JP7660452B2

JP7660452B2 - Condensation device and condensation method

Info

Publication number: JP7660452B2
Application number: JP2021112605A
Authority: JP
Inventors: 伸英原; 晋平岡安; 拓央小田; 浩一谷本; 健祐寺井; 聡広亀井; 洋章富田
Original assignee: Mitsubishi Heavy Industries Ltd
Current assignee: Mitsubishi Heavy Industries Ltd
Priority date: 2021-07-07
Filing date: 2021-07-07
Publication date: 2025-04-11
Anticipated expiration: 2041-07-07
Also published as: JP2023009384A

Description

本開示は、凝縮装置および凝縮方法に関する。 This disclosure relates to a condensation device and a condensation method.

例えば、特許文献１に、原子炉圧力容器を格納する格納容器の安全を確保するための格納容器保全設備が開示されている。この格納容器保全設備は、格納容器の外部に引き出されて設けられた排気配管と、格納容器の外部で排気配管に接続される希ガス貯留タンク（凝縮装置）と、希ガス貯留タンクの内部上方に配置され該希ガス貯留タンクの内部に散水してガス中の蒸気を凝縮させる散水部と、希ガス貯留タンクの内部に貯留された凝縮水の液相に配置され、該凝縮水中にガスを分散させて導入するガス導入部と、を備える。 For example, Patent Document 1 discloses a containment vessel maintenance equipment for ensuring the safety of a containment vessel that contains a reactor pressure vessel. This containment vessel maintenance equipment includes an exhaust pipe that is extended to the outside of the containment vessel, a rare gas storage tank (condenser) that is connected to the exhaust pipe outside the containment vessel, a water spraying unit that is disposed inside and above the rare gas storage tank and sprays water inside the rare gas storage tank to condense the vapor in the gas, and a gas introduction unit that is disposed in the liquid phase of the condensed water stored inside the rare gas storage tank and introduces the gas by dispersing it into the condensed water.

特許第６７４８０１２号公報Patent No. 6748012

上記格納容器保全設備は、原子力設備（原子力プラント）におけるシビアアクシデントを想定した対策として設置される。格納容器保全設備は、シビアアクシデント時に格納容器内の崩壊熱を徐熱するために冷却水がスプレイされるが、冷却水が蒸発したガスによって格納容器内の圧力が上昇することとなり、この圧力上昇を抑えるため格納容器から排気配管を通してガスが凝縮装置に送られる。凝縮装置では、ガス導入部から導入されたガスは、凝縮水中に分散されることにより、凝縮装置内でのガスの偏流を抑制し、該ガスに含まれる蒸気を凝縮水で冷却して凝縮できる。 The containment vessel maintenance equipment is installed as a measure in anticipation of severe accidents in nuclear facilities (nuclear plants). In the containment vessel maintenance equipment, cooling water is sprayed to remove decay heat inside the containment vessel in the event of a severe accident, but the pressure inside the containment vessel increases due to gas produced by evaporation of the cooling water, and to suppress this pressure increase, gas is sent from the containment vessel through exhaust piping to a condenser. In the condenser, the gas introduced from the gas inlet is dispersed into the condensed water, suppressing the uneven flow of gas within the condenser, and the steam contained in the gas can be cooled and condensed by the condensed water.

ところで、ガス導入部について、凝縮水の水面よりも上方の気相部にヘッダー管を配置し、当該ヘッダー管から下方に延びる複数のスパージャ管を凝縮水の液相に配置することで、スパージャ管の先端から凝縮水中にガスを分散させる構成が想定される。 As for the gas introduction section, a header pipe is arranged in the gas phase above the water surface of the condensed water, and multiple sparger pipes extending downward from the header pipe are arranged in the liquid phase of the condensed water, so that gas is dispersed into the condensed water from the tip of the sparger pipe.

しかし、このように想定した構成において、スパージャ管は、凝縮水の水位変動に対応できるように上下方向の長さを十分に確保する必要があり、当該長さにおいて振動が発生する。このため、スパージャ管は、振動によって荷重がかかり破損のおそれがある。 However, in this assumed configuration, the sparger pipe needs to have a sufficient vertical length to accommodate fluctuations in the condensed water level, and vibrations occur along that length. As a result, the sparger pipe is subject to loads caused by vibrations, which can cause it to break.

また、スパージャ管は、凝縮水中に供給されるガスに含まれる蒸気が急激に凝縮することで収縮により圧力が低下して凝縮水が吸い上げられ、その後にガスが再び供給され、これが繰り返されるチャギング現象が発生する。このため、スパージャ管は、チャギング現象に伴う振動によって荷重がかかり破損のおそれがある。 In addition, when the steam contained in the gas supplied into the condensed water suddenly condenses, the sparger pipe contracts, causing a drop in pressure and sucking up the condensed water, after which gas is supplied again, and this cycle is repeated, creating a chugging phenomenon. For this reason, the sparger pipe is subject to loads caused by the vibrations associated with the chugging phenomenon, which can cause it to break.

本開示は上述した課題を解決するものであり、スパージャ管への振動による荷重影響を防ぐことのできる凝縮装置および凝縮方法を提供することを目的とする。 The present disclosure aims to solve the above-mentioned problems and provide a condensation device and a condensation method that can prevent the load effect due to vibration on the sparger pipe.

上述の目的を達成するために、本開示の一態様に係る凝縮装置は、底部に凝縮水が貯留される貯留タンクと、前記貯留タンクの内部において前記凝縮水の水面より上の気相部に配置され前記貯留タンクの外部から蒸気を含むガスが供給されるヘッダー管と、前記ヘッダー管から下方に延びた先端が前記凝縮水の液相部に配置される複数のスパージャ管と、複数の前記スパージャ管を接続する接続部と、を備える。 In order to achieve the above-mentioned object, a condensation device according to one embodiment of the present disclosure includes a storage tank in which condensed water is stored at the bottom, a header pipe disposed in a gas phase portion above the water level of the condensed water inside the storage tank and to which gas containing steam is supplied from outside the storage tank, a number of sparger pipes whose ends extending downward from the header pipe are disposed in the liquid phase portion of the condensed water, and a connection portion connecting the multiple sparger pipes.

上述の目的を達成するために、本開示の一態様に係る凝縮装置は、底部に凝縮水が貯留される貯留タンクと、前記貯留タンクの内部において前記凝縮水の水面より上の気相部に配置され前記貯留タンクの外部から蒸気を含むガスが供給されるヘッダー管と、前記ヘッダー管から下方に延びた先端が前記凝縮水の液相部に配置される複数のスパージャ管と、を備え、前記スパージャ管は、先端部に設けられた開閉部と、前記開閉部を塞ぐように弾性支持する弾性部材と、を含み、前記ガスの圧力によって前記弾性部材の弾性力に抗して前記開閉部が開閉する。 In order to achieve the above-mentioned object, a condensation device according to one embodiment of the present disclosure includes a storage tank in which condensed water is stored at the bottom, a header pipe disposed in a gas phase portion above the water level of the condensed water inside the storage tank and to which gas containing steam is supplied from outside the storage tank, and a number of sparger pipes whose tips extending downward from the header pipe are disposed in the liquid phase portion of the condensed water, the sparger pipes including an opening/closing portion provided at the tip and an elastic member that elastically supports the opening/closing portion so as to close the opening/closing portion, and the opening/closing portion opens and closes against the elastic force of the elastic member due to the pressure of the gas.

上述の目的を達成するために、本開示の一態様に係る凝縮方法は、底部に凝縮水が貯留される貯留タンクと、前記貯留タンクの内部において前記凝縮水の水面より上の気相部に配置され前記貯留タンクの外部から蒸気を含むガスが供給され、前記ガスの供給側との間に開閉弁を介して複数に分岐して設けられるヘッダー管と、前記ヘッダー管から下方に延びた先端が前記凝縮水の液相部に配置される複数のスパージャ管と、前記ヘッダー管に送られるガスの圧力を検出する圧力検出部と、前記圧力検出部が検出する圧力に応じて各前記開閉弁を開閉制御する制御部と、を備える、凝縮装置を用いた凝縮方法であって、前記制御部は、前記圧力検出部が検出する圧力が上昇傾向にある場合に各前記開閉弁を開放制御する一方、前記圧力検出部が検出する圧力が下降傾向にある場合に各前記開閉弁の一部を閉鎖制御する。 In order to achieve the above-mentioned object, a condensation method according to one aspect of the present disclosure is a condensation method using a condensation device that includes a storage tank at the bottom of which condensed water is stored, a header pipe that is arranged in a gas phase portion above the water level of the condensed water inside the storage tank and to which gas containing steam is supplied from outside the storage tank and that is branched into multiple parts via an on-off valve between the gas supply side, multiple sparger pipes whose ends extending downward from the header pipe are arranged in the liquid phase portion of the condensed water, a pressure detection unit that detects the pressure of the gas sent to the header pipe, and a control unit that controls the opening and closing of each of the on-off valves in accordance with the pressure detected by the pressure detection unit, and the control unit controls each of the on-off valves to open when the pressure detected by the pressure detection unit is on an upward trend, and controls a part of each of the on-off valves to close when the pressure detected by the pressure detection unit is on a downward trend.

本開示は、スパージャ管への振動による荷重影響を防ぐことができる。 This disclosure can prevent the load effects of vibration on the sparger pipe.

図１は、実施形態に係る凝縮装置が適用される格納容器保全設備の構成図である。FIG. 1 is a configuration diagram of a containment vessel maintenance facility to which a condensation device according to an embodiment is applied. 図２は、実施形態に係る格納容器保全設備の制御系のブロック図である。FIG. 2 is a block diagram of a control system of the containment vessel integrity system according to the embodiment. 図３は、実施形態に係る凝縮装置の横断面図である。FIG. 3 is a cross-sectional view of a condensation device according to an embodiment. 図４は、実施形態に係る凝縮装置の縦断面図である。FIG. 4 is a vertical cross-sectional view of the condensation device according to the embodiment. 図５は、実施形態に係る凝縮装置の部分拡大断面図である。FIG. 5 is a partially enlarged cross-sectional view of the condensation device according to the embodiment. 図６は、実施形態に係る凝縮方法のフローチャートである。FIG. 6 is a flow chart of a condensation method according to an embodiment.

以下に、本開示に係る実施形態を図面に基づいて詳細に説明する。なお、この実施形態によりこの発明が限定されるものではない。また、下記実施形態における構成要素には、当業者が置換可能かつ容易なもの、あるいは実質的に同一のものが含まれる。また、下記実施形態における構成要素は、適宜組み合わせが可能である。 Below, an embodiment of the present disclosure will be described in detail with reference to the drawings. Note that the present invention is not limited to this embodiment. Furthermore, the components in the following embodiment include those that are easily replaceable by a person skilled in the art, or those that are substantially the same. Furthermore, the components in the following embodiment can be combined as appropriate.

図１は、実施形態に係る凝縮装置が適用される格納容器保全設備の構成図である。図１において、格納容器１００は、原子力設備において、炉心である複数の燃料集合体を密閉状態で収容する原子炉圧力容器１０１を格納するものである。原子力設備では、原子炉圧力容器１０１にて加熱された高温・高圧の水の熱を利用して水蒸気（以下、単に蒸気と記載する）を発生させ、この蒸気で格納容器１００の外部に設けられた蒸気タービンを駆動して発電に供する。格納容器１００は、岩盤などの堅固な地盤上に立設され、鉄筋コンクリートなどにより堅牢に形成されていることで、内部に所定容量の凝縮性ガスである蒸気および空気、放射性希ガスなどの非凝縮性ガスを含むガスを所定圧力の範囲で封じ込めることが可能に構成されている。 Figure 1 is a diagram of a containment vessel maintenance facility to which a condensation device according to an embodiment is applied. In Figure 1, the containment vessel 100 contains a reactor pressure vessel 101 that contains a plurality of fuel assemblies, which are the core, in a sealed state in a nuclear power facility. In the nuclear power facility, water vapor (hereinafter simply referred to as steam) is generated using the heat of high-temperature, high-pressure water heated in the reactor pressure vessel 101, and this steam drives a steam turbine installed outside the containment vessel 100 to generate electricity. The containment vessel 100 is erected on solid ground such as bedrock and is robustly formed from reinforced concrete or the like, so that it is configured to be able to contain within a predetermined pressure range a predetermined volume of steam, which is a condensable gas, and gases, including air and non-condensable gases such as radioactive rare gases.

格納容器保全設備５０は、炉心が損傷して原子炉圧力容器１０１から溶融炉心が流出する過酷事象であるシビアアクシデント時において、格納容器１００の安全を確保する。格納容器保全設備５０は、圧力検出部１０と、フィルタユニット１１と、排気配管１２と、凝縮装置１３と、冷却部１４と、凝縮水送出部１５と、除湿装置１６と、第一吸着部１７と、第二吸着部１８と、貯留部１９と、を有する。 The containment vessel maintenance equipment 50 ensures the safety of the containment vessel 100 during a severe accident, which is a severe event in which the core is damaged and the molten core flows out of the reactor pressure vessel 101. The containment vessel maintenance equipment 50 has a pressure detection unit 10, a filter unit 11, an exhaust pipe 12, a condenser 13, a cooling unit 14, a condensed water discharge unit 15, a dehumidifier 16, a first adsorption unit 17, a second adsorption unit 18, and a storage unit 19.

圧力検出部１０は、格納容器１００の内部の圧力を検出する。 The pressure detection unit 10 detects the pressure inside the storage vessel 100.

フィルタユニット１１は、実施形態において格納容器１００の内部に設けられている。フィルタユニット１１は、ガスに含まれる放射性よう素や粒子状の放射性物質を捕捉するフィルタがケーシングの内部に設けられている。フィルタユニット１１は、ケーシングの内部に格納容器１００の内部のガスを通過させることで、フィルタによりガス中の放射性よう素や粒子状の放射性物質を除去する。ただし、キセノン（Ｘｅ）やクリプトン（Ｋｒ）のような放射性希ガス、蒸気や空気は、フィルタで捕捉できないためケーシングを通過する。従って、フィルタユニット１１は、放射性よう素や粒子状の放射性物質を捕捉して除去する一方で、凝縮性ガスである蒸気、および空気や放射性希ガスなどの非凝縮性ガスを含むガスを通過させる。 In the embodiment, the filter unit 11 is provided inside the containment vessel 100. The filter unit 11 is provided with a filter inside the casing that captures radioactive iodine and particulate radioactive materials contained in the gas. The filter unit 11 removes radioactive iodine and particulate radioactive materials in the gas by passing the gas inside the containment vessel 100 through the inside of the casing. However, radioactive rare gases such as xenon (Xe) and krypton (Kr), steam, and air cannot be captured by the filter and therefore pass through the casing. Therefore, the filter unit 11 captures and removes radioactive iodine and particulate radioactive materials, while allowing gases including steam, which is a condensable gas, and non-condensable gases such as air and radioactive rare gases to pass through.

排気配管１２は、一端がフィルタユニット１１に接続され、他端が格納容器１００の外部に引き出されて設けられている。排気配管１２は、その途中に、逆止弁１２Ａが設けられる。逆止弁１２Ａは、フィルタユニット１１に接続される一端側から格納容器１００の外部に引き出された他端側へのガスの通過を許容し、その逆の流れを阻止する。 The exhaust pipe 12 has one end connected to the filter unit 11 and the other end pulled out to the outside of the containment vessel 100. A check valve 12A is provided midway along the exhaust pipe 12. The check valve 12A allows gas to pass from the one end connected to the filter unit 11 to the other end pulled out to the outside of the containment vessel 100, and prevents gas from flowing in the opposite direction.

凝縮装置１３は、貯留タンク１３Ａと、ヘッダー管１３Ｂと、開閉弁１３Ｃと、スパージャ管１３Ｄと、散水部１３Ｅと、排水部１３Ｆと、排気部１３Ｇと、を備える。貯留タンク１３Ａは、半球状の底部と、半球状の頂部との間を円筒状の胴部で連結した密閉容器である。貯留タンク１３Ａは、底部に凝縮水１３Ｈが貯留される。ヘッダー管１３Ｂは、貯留タンク１３Ａの内部であって凝縮水１３Ｈの水面より上の気相部に配置される。ヘッダー管１３Ｂは、排気配管１２に接続される。開閉弁１３Ｃは、ヘッダー管１３Ｂと排気配管１２との間に配置され、排気配管１２とヘッダー管１３Ｂとを開閉する。スパージャ管１３Ｄは、ヘッダー管１３Ｂから下方に延びて設けられ、下方に延びた先端が凝縮水１３Ｈの内部の液相部に配置される。散水部１３Ｅは、貯留タンク１３Ａの内部であって上方に配置され、貯留タンク１３Ａの内部に散水する。散水による水は、凝縮水１３Ｈとして貯留タンク１３Ａの底部に貯留される。排水部１３Ｆは、貯留タンク１３Ａの底部に設けられ、凝縮水１３Ｈを貯留タンク１３Ａの外部に排水する部分である。排気部１３Ｇは、貯留タンク１３Ａの頂部に設けられ気相部の気体を貯留タンク１３Ａの外部に排気する部分である。従って、凝縮装置１３は、開閉弁１３Ｃの開放によってフィルタユニット１１を通過したガスが貯留タンク１３Ａに供給される。凝縮装置１３は、ヘッダー管１３Ｂを介してスパージャ管１３Ｄから凝縮水１３Ｈの内部にガスが供給され、凝縮水１３Ｈによってガス中の蒸気を凝縮する。また、凝縮装置１３は、ガス中の蒸気を凝縮することで蒸気と非凝縮性ガスとを分離する。 The condensation device 13 includes a storage tank 13A, a header pipe 13B, an on-off valve 13C, a sparger pipe 13D, a water spray section 13E, a drain section 13F, and an exhaust section 13G. The storage tank 13A is a sealed container with a hemispherical bottom and a hemispherical top connected by a cylindrical body. Condensed water 13H is stored at the bottom of the storage tank 13A. The header pipe 13B is disposed inside the storage tank 13A in a gas phase portion above the water surface of the condensed water 13H. The header pipe 13B is connected to the exhaust pipe 12. The on-off valve 13C is disposed between the header pipe 13B and the exhaust pipe 12, and opens and closes the exhaust pipe 12 and the header pipe 13B. The sparger pipe 13D is provided extending downward from the header pipe 13B, and the tip extending downward is disposed in the liquid phase portion inside the condensed water 13H. The water spraying section 13E is disposed inside and above the storage tank 13A, and sprays water into the inside of the storage tank 13A. The water sprayed is stored at the bottom of the storage tank 13A as condensed water 13H. The drainage section 13F is provided at the bottom of the storage tank 13A, and is a section that drains the condensed water 13H to the outside of the storage tank 13A. The exhaust section 13G is provided at the top of the storage tank 13A, and is a section that exhausts the gas in the gas phase to the outside of the storage tank 13A. Therefore, the condenser 13 supplies gas that has passed through the filter unit 11 to the storage tank 13A by opening the opening/closing valve 13C. The condenser 13 supplies gas from the sparger pipe 13D to the inside of the condensed water 13H through the header pipe 13B, and condenses the steam in the gas with the condensed water 13H. The condenser 13 also separates the steam from the non-condensable gas by condensing the steam in the gas.

冷却部１４は、循環配管１４Ａと、熱交換器１４Ｂと、冷却ポンプ１４Ｃと、を備える。循環配管１４Ａは、一端が貯留タンク１３Ａの排水部１３Ｆに接続され、他端が貯留タンク１３Ａの上部にて貯留タンク１３Ａの内部の散水部１３Ｅに接続される。従って、循環配管１４Ａは、貯留タンク１３Ａを含みループ状に設けられている。熱交換器１４Ｂは、循環配管１４Ａの途中に設けられる。熱交換器１４Ｂは、冷却水が供給されるケーシングの内部に循環配管１４Ａの途中に介在された伝熱管が設けられる。熱交換器１４Ｂは、ケーシングの内部に冷却水が通過する。冷却水は、例えば、海水や湖水などがあり、図示しない冷却水供給ポンプにより供給されてケーシングの内部を経て海や湖に戻される。冷却ポンプ１４Ｃは、循環配管１４Ａの途中に設けられており、貯留タンク１３Ａに貯留された凝縮水１３Ｈを循環配管１４Ａによって循環させる。従って、貯留タンク１３Ａに貯留された凝縮水１３Ｈは、熱交換器１４Ｂを経由して冷却されて貯留タンク１３Ａの散水部１３Ｅから散水される。 The cooling section 14 includes a circulation pipe 14A, a heat exchanger 14B, and a cooling pump 14C. One end of the circulation pipe 14A is connected to the drainage section 13F of the storage tank 13A, and the other end is connected to the water spray section 13E inside the storage tank 13A at the top of the storage tank 13A. Therefore, the circulation pipe 14A is provided in a loop shape including the storage tank 13A. The heat exchanger 14B is provided in the middle of the circulation pipe 14A. The heat exchanger 14B is provided with a heat transfer tube interposed in the middle of the circulation pipe 14A inside the casing to which the cooling water is supplied. The cooling water passes through the inside of the heat exchanger 14B. The cooling water is, for example, seawater or lake water, and is supplied by a cooling water supply pump (not shown) and returned to the sea or lake through the inside of the casing. The cooling pump 14C is provided in the middle of the circulation pipe 14A, and circulates the condensed water 13H stored in the storage tank 13A through the circulation pipe 14A. Therefore, the condensed water 13H stored in the storage tank 13A is cooled via the heat exchanger 14B and sprayed from the spray section 13E of the storage tank 13A.

凝縮水送出部１５は、送出配管１５Ａと、送出ポンプ１５Ｂと、送出開閉弁１５Ｃと、逆止弁１５Ｄと、を備える。送出配管１５Ａは、一端が貯留タンク１３Ａの排水部１３Ｆに接続され、他端が格納容器１００の内部に至り設けられている。送出配管１５Ａは、一端部が冷却部１４の循環配管１４Ａの一端部と共用される。送出ポンプ１５Ｂは、送出配管１５Ａの途中に設けられており、貯留タンク１３Ａに貯留された凝縮水１３Ｈを送出配管１５Ａによって格納容器１００の内部に送り出す。送出開閉弁１５Ｃは、送出配管１５Ａにおいて送出ポンプ１５Ｂよりも一端側（貯留タンク１３Ａ側）に設けられる。送出開閉弁１５Ｃは、送出配管１５Ａを開閉する。逆止弁１５Ｄは、送出配管１５Ａの他端側に接続されている。逆止弁１５Ｄは、送出配管１５Ａにおいて送出ポンプ１５Ｂよりも他端側（格納容器１００側）に設けられる。逆止弁１５Ｄは、貯留タンク１３Ａに接続される一端側から格納容器１００の内部に設けられた他端側への凝縮水１３Ｈの通過を許容し、その逆の流れを阻止する。 The condensed water discharge section 15 includes a discharge pipe 15A, a discharge pump 15B, a discharge on-off valve 15C, and a check valve 15D. One end of the discharge pipe 15A is connected to the drainage section 13F of the storage tank 13A, and the other end is provided to reach the inside of the containment vessel 100. One end of the discharge pipe 15A is shared with one end of the circulation pipe 14A of the cooling section 14. The discharge pump 15B is provided in the middle of the discharge pipe 15A, and discharges the condensed water 13H stored in the storage tank 13A to the inside of the containment vessel 100 through the discharge pipe 15A. The discharge on-off valve 15C is provided on the discharge pipe 15A at one end side (storage tank 13A side) of the discharge pump 15B. The discharge on-off valve 15C opens and closes the discharge pipe 15A. The check valve 15D is connected to the other end of the delivery pipe 15A. The check valve 15D is provided on the other end side (the storage vessel 100 side) of the delivery pipe 15A from the delivery pump 15B. The check valve 15D allows the passage of condensed water 13H from one end connected to the storage tank 13A to the other end provided inside the storage vessel 100, and prevents the reverse flow.

除湿装置１６は、除湿配管１６Ａと、除湿器１６Ｂと、を備える。除湿配管１６Ａは、貯留タンク１３Ａの排気部１３Ｇに接続され、貯留タンク１３Ａの内部の非凝縮性ガスを貯留タンク１３Ａの外部に送り出す。除湿配管１６Ａは、不図示の開閉弁によって開閉される。除湿器１６Ｂは、除湿配管１６Ａの途中に設けられ、除湿配管１６Ａを通過する非凝縮性ガスから湿分を除去する。 The dehumidification device 16 includes a dehumidification pipe 16A and a dehumidifier 16B. The dehumidification pipe 16A is connected to the exhaust section 13G of the storage tank 13A, and sends the non-condensable gas inside the storage tank 13A to the outside of the storage tank 13A. The dehumidification pipe 16A is opened and closed by an opening and closing valve (not shown). The dehumidifier 16B is provided midway along the dehumidification pipe 16A, and removes moisture from the non-condensable gas passing through the dehumidification pipe 16A.

第一吸着部１７は、吸着塔１７Ａと、第一排気管１７Ｂと、第二排気管１７Ｃと、真空ポンプ１７Ｄと、を備える。吸着塔１７Ａは、除湿配管１６Ａが接続される。従って、吸着塔１７Ａは、除湿器１６Ｂによって除湿された非凝縮性ガスが送られる。吸着塔１７Ａは、密閉容器の内部に希ガス吸着材が収容される。従って、吸着塔１７Ａは、非凝縮性ガスに含まれる放射性希ガスを吸着する。第一排気管１７Ｂは、吸着塔１７Ａに接続され、不図示の開閉弁によって開閉される。第一排気管１７Ｂは、開放時に、希ガス吸着材に吸着されなかった空気が大気に放出される。第二排気管１７Ｃは、吸着塔１７Ａに接続され、不図示の開閉弁によって開閉される。真空ポンプ１７Ｄは、第二排気管１７Ｃに設けられる。第二排気管１７Ｃは、開放時に、真空ポンプ１７Ｄの駆動によって、希ガス吸着材に吸着されている放射性希ガスが送り出される。 The first adsorption section 17 includes an adsorption tower 17A, a first exhaust pipe 17B, a second exhaust pipe 17C, and a vacuum pump 17D. The adsorption tower 17A is connected to a dehumidification pipe 16A. Thus, the non-condensable gas dehumidified by the dehumidifier 16B is sent to the adsorption tower 17A. The adsorption tower 17A contains a rare gas adsorbent inside a sealed container. Thus, the adsorption tower 17A adsorbs the radioactive rare gas contained in the non-condensable gas. The first exhaust pipe 17B is connected to the adsorption tower 17A and is opened and closed by an on-off valve (not shown). When the first exhaust pipe 17B is opened, air that has not been adsorbed by the rare gas adsorbent is released to the atmosphere. The second exhaust pipe 17C is connected to the adsorption tower 17A and is opened and closed by an on-off valve (not shown). The vacuum pump 17D is provided in the second exhaust pipe 17C. When the second exhaust pipe 17C is open, the radioactive rare gas adsorbed in the rare gas adsorbent is pumped out by driving the vacuum pump 17D.

第二吸着部１８は、吸着塔１８Ａと、第一排気管１８Ｂと、第二排気管１８Ｃと、真空ポンプ１８Ｄと、を備える。吸着塔１８Ａは、第一吸着部１７の第二排気管１７Ｃが接続される。従って、吸着塔１８Ａは、第一吸着部１７の吸着塔１７Ａから送り出された放射性希ガスが送られる。吸着塔１８Ａは、密閉容器の内部に希ガス吸着材が収容される。従って、吸着塔１８Ａは、送られた放射性希ガスを吸着する。第一排気管１８Ｂは、吸着塔１８Ａに接続され、不図示の開閉弁によって開閉される。第一排気管１８Ｂは、開放時に、希ガス吸着材に吸着されなかった空気が大気に放出される。第二排気管１８Ｃは、吸着塔１８Ａに接続され、不図示の開閉弁によって開閉される。真空ポンプ１８Ｄは、第二排気管１８Ｃに設けられる。第二排気管１８Ｃは、開放時に、真空ポンプ１７Ｄの駆動によって、希ガス吸着材に吸着されている放射性希ガスが送り出される。従って、第二吸着部１８は、第一吸着部１７と協働して放射性希ガスを濃縮することで減容する。 The second adsorption section 18 includes an adsorption tower 18A, a first exhaust pipe 18B, a second exhaust pipe 18C, and a vacuum pump 18D. The adsorption tower 18A is connected to the second exhaust pipe 17C of the first adsorption section 17. Thus, the adsorption tower 18A is sent the radioactive rare gas sent from the adsorption tower 17A of the first adsorption section 17. The adsorption tower 18A contains a rare gas adsorbent inside a sealed container. Thus, the adsorption tower 18A adsorbs the sent radioactive rare gas. The first exhaust pipe 18B is connected to the adsorption tower 18A and is opened and closed by an opening and closing valve (not shown). When the first exhaust pipe 18B is opened, air that has not been adsorbed by the rare gas adsorbent is released to the atmosphere. The second exhaust pipe 18C is connected to the adsorption tower 18A and is opened and closed by an opening and closing valve (not shown). The vacuum pump 18D is provided in the second exhaust pipe 18C. When the second exhaust pipe 18C is open, the radioactive rare gas adsorbed in the rare gas adsorbent is pumped out by driving the vacuum pump 17D. Therefore, the second adsorption section 18 works together with the first adsorption section 17 to reduce the volume by concentrating the radioactive rare gas.

貯留部１９は、密閉容器で構成され、第二吸着部１８の第二排気管１８Ｃが接続される。従って、貯留部１９は、第二吸着部１８の吸着塔１８Ａから送り出された放射性希ガスが送られる。貯留部１９は、送られた放射性希ガスを貯留する。 The storage section 19 is composed of a sealed container, and is connected to the second exhaust pipe 18C of the second adsorption section 18. Therefore, the radioactive rare gas sent from the adsorption tower 18A of the second adsorption section 18 is sent to the storage section 19. The storage section 19 stores the sent radioactive rare gas.

図２は、実施形態に係る格納容器保全設備の制御系のブロック図である。 Figure 2 is a block diagram of the control system for the containment vessel maintenance equipment according to the embodiment.

上述した格納容器保全設備５０は、図２に示す制御部２０により制御される。制御部２０は、例えば、コンピュータであり、図には明示しないが、ＣＰＵ（Central Processing Unit）のようなマイクロプロセッサを含む演算処理装置などにより実現される。制御部２０は、圧力検出部１０が接続される。制御部２０は、凝縮装置１３の開閉弁１３Ｃが接続される。制御部２０は、冷却部１４の冷却ポンプ１４Ｃが接続される。制御部２０は、凝縮水送出部１５の送出ポンプ１５Ｂと送出開閉弁１５Ｃが接続される。制御部２０は、第一吸着部１７の真空ポンプ１７Ｄが接続される。制御部２０は、第二吸着部１８の真空ポンプ１８Ｄが接続される。また、図には明示しないが、制御部２０は、除湿装置１６の除湿配管１６Ａを開閉する開閉弁や、第一吸着部１７の第一排気管１７Ｂを開閉する開閉弁や、第一吸着部１７の第二排気管１７Ｃを開閉する開閉弁や、第二吸着部１８の第一排気管１８Ｂを開閉する開閉弁や、第二吸着部１８の第二排気管１８Ｃを開閉する開閉弁も接続される。 The containment vessel maintenance equipment 50 described above is controlled by the control unit 20 shown in FIG. 2. The control unit 20 is, for example, a computer, and is realized by an arithmetic processing device including a microprocessor such as a CPU (Central Processing Unit), although not shown in the figure. The pressure detection unit 10 is connected to the control unit 20. The on-off valve 13C of the condenser 13 is connected to the control unit 20. The cooling pump 14C of the cooling unit 14 is connected to the control unit 20. The delivery pump 15B and the delivery on-off valve 15C of the condensed water delivery unit 15 are connected to the control unit 20. The vacuum pump 17D of the first adsorption unit 17 is connected to the control unit 20. The vacuum pump 18D of the second adsorption unit 18 is connected to the control unit 20. In addition, although not shown in the figure, the control unit 20 is also connected to an on-off valve that opens and closes the dehumidification pipe 16A of the dehumidifier 16, an on-off valve that opens and closes the first exhaust pipe 17B of the first adsorption unit 17, an on-off valve that opens and closes the second exhaust pipe 17C of the first adsorption unit 17, an on-off valve that opens and closes the first exhaust pipe 18B of the second adsorption unit 18, and an on-off valve that opens and closes the second exhaust pipe 18C of the second adsorption unit 18.

格納容器保全設備５０では、制御部２０は、圧力検出部１０によって検出される格納容器１００の内部の圧力が所定値を超えた場合、開閉弁１３Ｃを開放制御する。格納容器保全設備５０は、開閉弁１３Ｃの開放によって、格納容器１００の内部からフィルタユニット１１を通過した凝縮性ガスである蒸気、および空気や放射性希ガスなどの非凝縮性ガスが排気配管１２からヘッダー管１３Ｂおよびスパージャ管１３Ｄを経て貯留タンク１３Ａに送られる。凝縮装置１３は、貯留タンク１３Ａの内部の液相部である凝縮水１３Ｈによって蒸気が凝縮される。一方、凝縮装置１３は、貯留タンク１３Ａの内部の気相部に非凝縮性ガスが貯留される。また、格納容器保全設備５０では、制御部２０は、冷却部１４の、冷却ポンプ１４Ｃを駆動制御する。格納容器保全設備５０は、冷却ポンプ１４Ｃの駆動によって、貯留タンク１３Ａの内部の凝縮水１３Ｈが循環配管１４Ａによって循環され散水部１３Ｅから散水される。また、格納容器保全設備５０では、制御部２０は、送出開閉弁１５Ｃを開放制御し、送出ポンプ１５Ｂを駆動制御する。格納容器保全設備５０は、送出開閉弁１５Ｃの開放、送出ポンプ１５Ｂの駆動によって、貯留タンク１３Ａの内部の凝縮水１３Ｈが格納容器１００の内部に送られて格納容器１００の冷却などに用いられる。凝縮装置１３は、凝縮水１３Ｈを格納容器１００に送ることで貯留タンク１３Ａの内部の凝縮水１３Ｈの水位が設定範囲内に調整され、スパージャ管１３Ｄの先端側が凝縮水１３Ｈの内部に常に配置される。また、格納容器保全設備５０では、制御部２０の制御によって、貯留タンク１３Ａの内部の非凝縮性ガスが除湿装置１６で除湿され、かつ第一吸着部１７および第二吸着部１８で空気が除去された放射性希ガスが貯留部１９に貯留される。 In the containment vessel maintenance equipment 50, the control unit 20 controls the opening of the on-off valve 13C when the pressure inside the containment vessel 100 detected by the pressure detection unit 10 exceeds a predetermined value. In the containment vessel maintenance equipment 50, by opening the on-off valve 13C, steam, which is a condensable gas that has passed through the filter unit 11 from inside the containment vessel 100, and non-condensable gases such as air and radioactive rare gases are sent from the exhaust pipe 12 through the header pipe 13B and the sparger pipe 13D to the storage tank 13A. In the condensation device 13, the steam is condensed by the condensed water 13H, which is the liquid phase inside the storage tank 13A. On the other hand, in the condensation device 13, the non-condensable gas is stored in the gas phase inside the storage tank 13A. In addition, in the containment vessel maintenance equipment 50, the control unit 20 drives and controls the cooling pump 14C of the cooling unit 14. In the containment vessel maintenance equipment 50, the cooling pump 14C is driven to circulate the condensed water 13H in the storage tank 13A through the circulation pipe 14A and to spray the water from the spray unit 13E. In the containment vessel maintenance equipment 50, the control unit 20 controls the opening of the delivery on-off valve 15C and drives the delivery pump 15B. In the containment vessel maintenance equipment 50, the condensed water 13H in the storage tank 13A is sent to the inside of the containment vessel 100 by opening the delivery on-off valve 15C and driving the delivery pump 15B, and is used for cooling the containment vessel 100, etc. In the condensation device 13, the water level of the condensed water 13H in the storage tank 13A is adjusted to within a set range by sending the condensed water 13H to the containment vessel 100, and the tip side of the sparger pipe 13D is always positioned inside the condensed water 13H. In addition, in the containment vessel maintenance equipment 50, the non-condensable gas inside the storage tank 13A is dehumidified by the dehumidifier 16 under the control of the control unit 20, and the radioactive rare gas from which the air has been removed in the first adsorption unit 17 and the second adsorption unit 18 is stored in the storage unit 19.

図３は、実施形態に係る凝縮装置の横断面図である。図４は、実施形態に係る凝縮装置の縦断面図である。図５は、実施形態に係る凝縮装置の部分拡大断面図である。 Figure 3 is a cross-sectional view of a condensation device according to an embodiment. Figure 4 is a vertical cross-sectional view of a condensation device according to an embodiment. Figure 5 is a partially enlarged cross-sectional view of a condensation device according to an embodiment.

実施形態の凝縮装置１３は、図３から図５に示すように、複数のスパージャ管１３Ｄを接続する接続部１３Ｋを備える。接続部１３Ｋは、複数のスパージャ管１３Ｄを連結する。接続部１３Ｋは、スパージャ管１３Ｄの先端部に配置される。接続部１３Ｋは、例えば、ステンレス鋼のような耐水性の金属などの剛性部材で構成された本体部材１３Ｋａと、耐水性の合成樹脂材やゴム材などの可撓性部材で構成された接合部材１３Ｋｂと、を含む。接合部材１３Ｋｂは、スパージャ管１３Ｄへの取り付け部分に設けられる。接合部材１３Ｋｂは、例えば、スパージャ管１３Ｄ周りに取り付けられるようにリング状に形成される。本体部材１３Ｋａは、各スパージャ管１３Ｄに設けられた各接合部材１３Ｋｂを接続するように設けられる。本体部材１３Ｋａは、例えば、板状または棒状に形成される。なお、接続部１３Ｋは、全体が耐水性の合成樹脂材やゴム材などの可撓性部材で構成されてもよい。 As shown in Figs. 3 to 5, the condensation device 13 of the embodiment includes a connection portion 13K that connects multiple sparger pipes 13D. The connection portion 13K connects multiple sparger pipes 13D. The connection portion 13K is arranged at the tip of the sparger pipe 13D. The connection portion 13K includes a main body member 13Ka made of a rigid member such as a water-resistant metal such as stainless steel, and a joint member 13Kb made of a flexible member such as a water-resistant synthetic resin material or rubber material. The joint member 13Kb is provided at the attachment portion to the sparger pipe 13D. The joint member 13Kb is formed, for example, in a ring shape so as to be attached around the sparger pipe 13D. The main body member 13Ka is provided so as to connect each joint member 13Kb provided on each sparger pipe 13D. The main body member 13Ka is formed, for example, in a plate shape or a rod shape. The connection portion 13K may be entirely made of a flexible member such as a water-resistant synthetic resin material or rubber material.

また、実施形態の凝縮装置１３は、図５に示すように、スパージャ管１３Ｄにおいて、スパージャ管１３Ｄを経て貯留タンク１３Ａの内部に送られるガスの圧力に応じて開閉可能な栓部１３Ｌを備える。栓部１３Ｌは、スパージャ管１３Ｄの先端部に設けられてスパージャ管１３Ｄの内部を上下方向に移動可能に設けられた開閉部１３Ｌａと、開閉部１３Ｌａを塞ぐように弾性力を生じる弾性部材１３Ｌｂと、を含む。開閉部１３Ｌａは、スパージャ管１３Ｄの内径よりも小さい径の板部材であって、スパージャ管１３Ｄの内壁に配置されたリング状の弁座１３Ｌｃに当接するように、上方に移動することでスパージャ管１３Ｄを閉鎖する。また、開閉部１３Ｌａは、弁座１３Ｌｃから離れるように、下方に移動することでスパージャ管１３Ｄを開放する。弾性部材１３Ｌｂは、例えば、圧縮コイルバネによって構成され、スパージャ管１３Ｄの先端の内側に設けられた係止部１３Ｌｄと開閉部１３Ｌａとの間に配置され、その弾性力によって開閉部１３Ｌａを弁座１３Ｌｃに当接するように付勢する。従って、スパージャ管１３Ｄを経て貯留タンク１３Ａの内部に送られるガスの圧力が弾性部材１３Ｌｂの弾性力を超える場合、開閉部１３Ｌａは、弁座１３Ｌｃから離れてスパージャ管１３Ｄを開放する。一方、ガスの圧力が弾性部材１３Ｌｂの弾性力よりも小さい場合、開閉部１３Ｌａは、弁座１３Ｌｃに当接してスパージャ管１３Ｄを閉鎖する。 As shown in FIG. 5, the condensation device 13 of the embodiment includes a stopper portion 13L that can be opened and closed in response to the pressure of the gas sent to the inside of the storage tank 13A through the sparger pipe 13D in the sparger pipe 13D. The stopper portion 13L includes an opening/closing portion 13La that is provided at the tip of the sparger pipe 13D and is movable vertically inside the sparger pipe 13D, and an elastic member 13Lb that generates an elastic force to close the opening/closing portion 13La. The opening/closing portion 13La is a plate member with a diameter smaller than the inner diameter of the sparger pipe 13D, and closes the sparger pipe 13D by moving upward so as to abut against a ring-shaped valve seat 13Lc arranged on the inner wall of the sparger pipe 13D. The opening/closing portion 13La opens the sparger pipe 13D by moving downward so as to move away from the valve seat 13Lc. The elastic member 13Lb is, for example, a compression coil spring, and is disposed between the locking portion 13Ld provided on the inside of the tip of the sparger pipe 13D and the opening/closing portion 13La, and biases the opening/closing portion 13La to abut against the valve seat 13Lc by its elastic force. Therefore, when the pressure of the gas sent to the inside of the storage tank 13A through the sparger pipe 13D exceeds the elastic force of the elastic member 13Lb, the opening/closing portion 13La moves away from the valve seat 13Lc to open the sparger pipe 13D. On the other hand, when the gas pressure is smaller than the elastic force of the elastic member 13Lb, the opening/closing portion 13La abuts against the valve seat 13Lc to close the sparger pipe 13D.

また、実施形態の凝縮装置１３は、図４に示すように、貯留タンク１３Ａの内部に多孔板１３Ｍを備える。多孔板１３Ｍは、貯留タンク１３Ａの内部において、スパージャ管１３Ｄの下方で貯留タンクを上下に仕切るように設けられる。多孔板１３Ｍは、上下方向に貫通する複数の孔１３Ｍａが形成される。多孔板１３Ｍは、網で構成されていてもよく、パンチングメタルで構成されていてもよい。 As shown in FIG. 4, the condensation device 13 of the embodiment includes a perforated plate 13M inside the storage tank 13A. The perforated plate 13M is provided inside the storage tank 13A below the sparger pipe 13D so as to separate the storage tank into upper and lower parts. The perforated plate 13M has a plurality of holes 13Ma formed therethrough in the vertical direction. The perforated plate 13M may be made of a mesh or punched metal.

また、実施形態の凝縮装置１３は、図４に示すように、貯留タンク１３Ａの底部に排水部１３Ｆを備える。排水部１３Ｆは、上述したように、凝縮水１３Ｈを貯留タンク１３Ａの外部に排水する部分であり、冷却部１４の循環配管１４Ａと、凝縮水送出部１５の送出配管１５Ａとが接続される。排水部１３Ｆは、貯留タンク１３Ａの内部の半球状の底部の中央に配置され、排水管１３Ｆａと、閉塞部１３Ｆｂと、貫通孔１３Ｆｃと、を含む。排水管１３Ｆａは、貯留タンク１３Ａの内部において底部から上方に延びる筒状に形成される。排水管１３Ｆａは、その下端が循環配管１４Ａおよび送出配管１５Ａに接続される。閉塞部１３Ｆｂは、排水管１３Ｆａの上端を塞ぐ部分である。貫通孔１３Ｆｃは、排水管１３Ｆａの周壁に貫通して複数設けられる。貫通孔１３Ｆｃは、排水管１３Ｆａの上側に配置される。従って、凝縮装置１３は、貯留タンク１３Ａの内部の凝縮水１３Ｈが貫通孔１３Ｆｃから排水管１３Ｆａの内部に流れ、排水管１３Ｆａの下端から循環配管１４Ａおよび送出配管１５Ａに排水される。 In addition, as shown in FIG. 4, the condensation device 13 of the embodiment includes a drainage section 13F at the bottom of the storage tank 13A. As described above, the drainage section 13F is a section that drains the condensed water 13H to the outside of the storage tank 13A, and is connected to the circulation pipe 14A of the cooling section 14 and the delivery pipe 15A of the condensed water delivery section 15. The drainage section 13F is disposed at the center of the hemispherical bottom inside the storage tank 13A, and includes a drainage pipe 13Fa, a blocking section 13Fb, and a through hole 13Fc. The drainage pipe 13Fa is formed in a cylindrical shape extending upward from the bottom inside the storage tank 13A. The lower end of the drainage pipe 13Fa is connected to the circulation pipe 14A and the delivery pipe 15A. The blocking section 13Fb is a section that blocks the upper end of the drainage pipe 13Fa. A plurality of through holes 13Fc are provided penetrating the peripheral wall of the drain pipe 13Fa. The through holes 13Fc are located on the upper side of the drain pipe 13Fa. Therefore, in the condensation device 13, the condensed water 13H inside the storage tank 13A flows from the through holes 13Fc into the inside of the drain pipe 13Fa, and is drained from the lower end of the drain pipe 13Fa to the circulation pipe 14A and the delivery pipe 15A.

また、実施形態の凝縮装置１３は、図３および図４に示すように、ヘッダー管１３Ｂが分岐して設けられ、それぞれが開閉弁１３Ｃを介して排気配管１２に接続される。ヘッダー管１３Ｂは、実施形態では、第一ヘッダー管１３Ｂ１と、第二ヘッダー管１３Ｂ２との２つに分岐して設けられる。 As shown in Figs. 3 and 4, the condenser 13 of the embodiment has a branched header pipe 13B, each of which is connected to the exhaust pipe 12 via an on-off valve 13C. In the embodiment, the header pipe 13B is branched into two header pipes, a first header pipe 13B1 and a second header pipe 13B2.

第一ヘッダー管１３Ｂ１は、開閉弁１３Ｃに接続されて貯留タンク１３Ａの内外に貫通する接続部１３Ｂ１ａと、貯留タンク１３Ａの内部において接続部１３Ｂ１ａに繋がるヘッダー部１３Ｂ１ｂと、を含む。接続部１３Ｂ１ａは、開閉弁１３Ｃからヘッダー部１３Ｂ１ｂに接続する配管である。ヘッダー部１３Ｂ１ｂは、スパージャ管１３Ｄが設けられる配管であって、貯留タンク１３Ａの円筒状の胴部に沿って円弧状（Ｃ字状）に形成される。実施形態のヘッダー部１３Ｂ１ｂは、貯留タンク１３Ａの内部において、接続部１３Ｂ１ａから水平方向の両側にそれぞれ配置され、貯留タンク１３Ａの円筒状の胴部に沿って周方向に延びて設けられる。 The first header pipe 13B1 includes a connection portion 13B1a that is connected to the on-off valve 13C and penetrates the inside and outside of the storage tank 13A, and a header portion 13B1b that is connected to the connection portion 13B1a inside the storage tank 13A. The connection portion 13B1a is a pipe that connects the on-off valve 13C to the header portion 13B1b. The header portion 13B1b is a pipe in which the sparger pipe 13D is provided, and is formed in an arc shape (C-shape) along the cylindrical body of the storage tank 13A. In the embodiment, the header portion 13B1b is disposed on both sides of the connection portion 13B1a in the horizontal direction inside the storage tank 13A, and is provided to extend circumferentially along the cylindrical body of the storage tank 13A.

第二ヘッダー管１３Ｂ２は、他の開閉弁１３Ｃに接続されて貯留タンク１３Ａの内外に貫通する接続部１３Ｂ２ａと、貯留タンク１３Ａの内部において接続部１３Ｂ２ａに繋がるヘッダー部１３Ｂ２ｂと、を含む。接続部１３Ｂ２ａは、開閉弁１３Ｃからヘッダー部１３Ｂ２ｂに接続する配管である。ヘッダー部１３Ｂ２ｂは、スパージャ管１３Ｄが設けられる配管であって、貯留タンク１３Ａの円筒状の胴部に沿って円弧状（Ｃ字状）に形成される。実施形態のヘッダー部１３Ｂ２ｂは、貯留タンク１３Ａの内部において、接続部１３Ｂ２ａから水平方向の両側にそれぞれ配置され、貯留タンク１３Ａの円筒状の胴部に沿って周方向に延びて設けられる。第二ヘッダー管１３Ｂ２のヘッダー部１３Ｂ２ｂは、図４に示すように、第一ヘッダー管１３Ｂ１のヘッダー部１３Ｂ１ｂの内側で水平方向に沿って配置される。 The second header pipe 13B2 includes a connection part 13B2a that is connected to another on-off valve 13C and penetrates the inside and outside of the storage tank 13A, and a header part 13B2b that is connected to the connection part 13B2a inside the storage tank 13A. The connection part 13B2a is a pipe that connects the on-off valve 13C to the header part 13B2b. The header part 13B2b is a pipe in which the sparger pipe 13D is provided, and is formed in an arc shape (C-shape) along the cylindrical body of the storage tank 13A. The header part 13B2b of the embodiment is arranged on both sides of the connection part 13B2a in the horizontal direction inside the storage tank 13A, and is provided to extend in the circumferential direction along the cylindrical body of the storage tank 13A. The header part 13B2b of the second header pipe 13B2 is arranged along the horizontal direction inside the header part 13B1b of the first header pipe 13B1, as shown in FIG. 4.

そして、スパージャ管１３Ｄは、図３に示すように、それぞれのヘッダー部１３Ｂ１ｂおよびヘッダー部１３Ｂ２ｂに沿って平面視で円弧状に配列される。また、スパージャ管１３Ｄを接続する接続部１３Ｋは、それぞれのヘッダー部１３Ｂ１ｂおよびヘッダー部１３Ｂ２ｂごとにスパージャ管１３Ｄを接続するように円弧状に形成される。 The sparger pipes 13D are arranged in an arc shape in plan view along each of the header sections 13B1b and 13B2b, as shown in FIG. 3. The connection sections 13K that connect the sparger pipes 13D are formed in an arc shape so as to connect the sparger pipes 13D to each of the header sections 13B1b and 13B2b.

よって、実施形態の凝縮装置１３は、ヘッダー管１３Ｂが、ガスの供給側である排気配管１２との間に開閉弁１３Ｃを介して複数に分岐して設けられる。実施形態の凝縮装置１３は、ヘッダー管１３Ｂが、第一ヘッダー管１３Ｂ１と第二ヘッダー管１３Ｂ２との２つに分岐して構成されている。この構成に限らず、凝縮装置１３は、第一ヘッダー管１３Ｂ１の各ヘッダー部１３Ｂ１ｂが、それぞれ開閉弁１３Ｃを介して分岐して構成され、第二ヘッダー管１３Ｂ２の各ヘッダー部１３Ｂ２ｂが、それぞれ開閉弁１３Ｃを介して分岐して構成されて、計４つに分岐して構成されてもよい。なお、各開閉弁１３Ｃは、それぞれ上記制御部２０によって開閉制御される。 Therefore, in the condensation device 13 of the embodiment, the header pipe 13B is provided between the exhaust pipe 12, which is the gas supply side, and is branched into multiple parts via the on-off valve 13C. In the condensation device 13 of the embodiment, the header pipe 13B is branched into two parts, a first header pipe 13B1 and a second header pipe 13B2. This configuration is not limited to this, and the condensation device 13 may be branched into a total of four parts, with each header section 13B1b of the first header pipe 13B1 branched via an on-off valve 13C, and each header section 13B2b of the second header pipe 13B2 branched via an on-off valve 13C. Note that each on-off valve 13C is controlled to open and close by the control unit 20.

また、実施形態の凝縮装置１３は、図３および図４に示すように、ヘッダー管１３Ｂを載置する支持部１３Ｊを備える。支持部１３Ｊは、貯留タンク１３Ａの内部に固定され、各ヘッダー部１３Ｂ１ｂ，１３Ｂ２ｂを支持する。支持部１３Ｊは、図４に示すように、貯留タンク１３Ａの内壁から内側に水平方向に延びて設けられた複数の支持部材１３Ｊａと、支持部材１３Ｊａを補強する補強部材１３Ｊｂと、支持部材１３Ｊａの上側に配置されてヘッダー管１３Ｂ（各ヘッダー部１３Ｂ１ｂ，１３Ｂ２ｂ）を水平方向への移動を許容して載置する載置部材１３Ｊｃと、を含む。 The condensation device 13 of the embodiment also includes a support portion 13J on which the header pipe 13B is placed, as shown in Figs. 3 and 4. The support portion 13J is fixed inside the storage tank 13A and supports each of the header portions 13B1b, 13B2b. As shown in Fig. 4, the support portion 13J includes a plurality of support members 13Ja extending horizontally inward from the inner wall of the storage tank 13A, reinforcing members 13Jb that reinforce the support members 13Ja, and a placement member 13Jc that is disposed above the support members 13Ja and allows the header pipe 13B (each of the header portions 13B1b, 13B2b) to be moved horizontally while being placed thereon.

このように、実施形態の凝縮装置１３は、底部に凝縮水１３Ｈが貯留される貯留タンク１３Ａと、貯留タンク１３Ａの内部において凝縮水１３Ｈの水面より上の気相部に配置され貯留タンク１３Ａの外部から蒸気を含むガスが供給されるヘッダー管１３Ｂと、ヘッダー管１３Ｂから下方に延びた先端が凝縮水１３Ｈの液相部に配置される複数のスパージャ管１３Ｄと、複数のスパージャ管１３Ｄを接続する接続部１３Ｋと、を備える。 Thus, the condensation device 13 of the embodiment includes a storage tank 13A in which condensed water 13H is stored at the bottom, a header pipe 13B that is disposed in the gas phase portion above the water surface of the condensed water 13H inside the storage tank 13A and to which gas containing steam is supplied from outside the storage tank 13A, a number of sparger pipes 13D whose tips extending downward from the header pipe 13B are disposed in the liquid phase portion of the condensed water 13H, and a connection portion 13K that connects the multiple sparger pipes 13D.

この凝縮装置１３によれば、複数のスパージャ管１３Ｄを接続部１３Ｋで接続したことで、スパージャ管１３Ｄ同士の振動モードが一致することを防ぎ、かつ各スパージャ管１３Ｄがフリーになることを防止する。この結果、実施形態の凝縮装置１３は、スパージャ管１３Ｄへの振動による荷重影響を防ぐことができる。 According to this condensation device 13, by connecting multiple sparger pipes 13D with connection parts 13K, the vibration modes of the sparger pipes 13D are prevented from matching, and each sparger pipe 13D is prevented from becoming free. As a result, the condensation device 13 of this embodiment can prevent the load effect due to vibration on the sparger pipes 13D.

また、実施形態の凝縮装置１３では、接続部１３Ｋは、スパージャ管１３Ｄへの取り付け部分に設けられた可撓性を有する接合部材１３Ｋｂを含む。従って、この凝縮装置１３によれば、可撓性を有する接合部材１３Ｋｂによって、各スパージャ管１３Ｄ管の振動の伝達を防げるため、スパージャ管１３Ｄへの振動による荷重影響を防ぐ効果を顕著に得ることができる。また、実施形態の凝縮装置１３では、接続部１３Ｋは、それ自体が可撓性を有する構成としても、各スパージャ管１３Ｄ管の振動の伝達を防げるため、同様の効果が得られる。 In addition, in the condensation device 13 of the embodiment, the connection portion 13K includes a flexible joint member 13Kb provided at the attachment portion to the sparger pipe 13D. Therefore, according to this condensation device 13, the flexible joint member 13Kb can prevent the transmission of vibrations of each sparger pipe 13D, so that the effect of preventing the load effect due to vibrations on the sparger pipe 13D can be significantly obtained. In addition, in the condensation device 13 of the embodiment, even if the connection portion 13K itself is configured to be flexible, the same effect can be obtained because the transmission of vibrations of each sparger pipe 13D can be prevented.

また、実施形態の凝縮装置１３では、スパージャ管１３Ｄにガスの圧力に応じて開閉可能な栓部１３Ｌを備える。従って、この凝縮装置１３によれば、ガスの圧力が高いときは、栓部１３Ｌが開放されてスパージャ管１３Ｄからガスを凝縮水１３Ｈに排出することができる。一方、この凝縮装置１３によれば、チャギング現象が発生するような上流側圧力の低い条件では、栓部１３Ｌが閉鎖することでガスが流れないため、チャギング現象の発生を防止できる。この結果、実施形態の凝縮装置１３は、チャギング現象に伴う振動によるスパージャ管１３Ｄへの荷重影響を防ぐことができる。 In addition, in the condensation device 13 of the embodiment, the sparger pipe 13D is provided with a plug portion 13L that can be opened and closed depending on the gas pressure. Therefore, with this condensation device 13, when the gas pressure is high, the plug portion 13L is opened and the gas can be discharged from the sparger pipe 13D to the condensed water 13H. On the other hand, with this condensation device 13, under conditions of low upstream pressure where chugging occurs, the plug portion 13L is closed to prevent gas from flowing, thereby preventing the occurrence of the chugging phenomenon. As a result, the condensation device 13 of the embodiment can prevent the load effect on the sparger pipe 13D due to vibrations associated with the chugging phenomenon.

また、実施形態の凝縮装置１３では、貯留タンク１３Ａの底部に設けられて凝縮水１３Ｈを外部に排出する排水部１３Ｆと、貯留タンク１３Ａの内部でスパージャ管１３Ｄと排水部１３Ｆとの間に配置され貯留タンク１３Ａを上下に仕切るように設けられた多孔板１３Ｍと、を備える。ここで、一般に、ガスが水中に噴流噴出され、このガスが排水部１３Ｆから凝縮水１３Ｈと共に排出されると、凝縮水１３Ｈを排水するためのポンプ側にガスが巻き込まれ、ポンプの軸の折損などの問題が生じるおそれがある。この点、実施形態の凝縮装置１３によれば、スパージャ管１３Ｄと排水部１３Ｆとの間に設けた多孔板１３Ｍがガスの抵抗になって、多孔板１３Ｍよりも下側に気泡が侵入し難くできる。また、この凝縮装置１３によれば、多孔板１３Ｍにてガスの気泡が合一することでガスの浮力が増して上昇しやすくなり、多孔板１３Ｍよりも下側に気泡が侵入し難くできる。この結果、実施形態の凝縮装置１３は、ガスが排水部１３Ｆから凝縮水１３Ｈと共に排出される事態を防ぎ、ポンプの軸の折損などの問題を防止できる。 In addition, the condensation device 13 of the embodiment includes a drainage section 13F that is provided at the bottom of the storage tank 13A and discharges the condensed water 13H to the outside, and a perforated plate 13M that is disposed between the sparger pipe 13D and the drainage section 13F inside the storage tank 13A and is provided to separate the storage tank 13A into upper and lower parts. Generally, when gas is jetted into the water and discharged from the drainage section 13F together with the condensed water 13H, the gas may be caught in the pump for draining the condensed water 13H, which may cause problems such as breakage of the pump shaft. In this regard, according to the condensation device 13 of the embodiment, the perforated plate 13M provided between the sparger pipe 13D and the drainage section 13F acts as a resistance to the gas, making it difficult for air bubbles to penetrate below the perforated plate 13M. In addition, with this condensation device 13, the gas bubbles coalesce at the perforated plate 13M, increasing the buoyancy of the gas and making it easier for the gas to rise, and it is difficult for the air bubbles to penetrate below the perforated plate 13M. As a result, the condensation device 13 of this embodiment can prevent the gas from being discharged from the drainage section 13F together with the condensed water 13H, and can prevent problems such as breakage of the pump shaft.

また、実施形態の凝縮装置１３では、貯留タンク１３Ａの底部において凝縮水１３Ｈを外部に排出する排水部１３Ｆを備え、排水部１３Ｆは、貯留タンク１３Ａの底部において上方に延びて設けられて下端が貯留タンク１３Ａの外部に通じる排水管１３Ｆａと、排水管１３Ｆａの上端を塞ぐ閉塞部１３Ｆｂと、排水管１３Ｆａの周壁に形成された貫通孔１３Ｆｃと、を含む。ここで、一般に、貯留タンク１３Ａの底部に排水穴が設けられている場合、排水穴への吸い込みによる渦が発生し、ガスが凝縮水１３Ｈと共に排出され易くなる。この点、実施形態の凝縮装置１３によれば、排水管１３Ｆａの上端を閉塞部１３Ｆｂで塞ぎ、排水管１３Ｆａの周壁に貫通孔１３Ｆｃを形成することで、吸い込みによる渦が発生を抑制できる。この結果、実施形態の凝縮装置１３は、ガスが排水部１３Ｆから凝縮水１３Ｈと共に排出される事態を防ぎ、ポンプの軸の折損などの問題を防止できる。なお、貯留タンク１３Ａは、半球状の底部のお椀型の下方に向かって断面積が小さくなり、直方向の水の流れが大きくなるため、ガスの吸い込み度合いが大きい。この点、実施形態の凝縮装置１３によれば、貫通孔１３Ｆｃを排水管１３Ｆａの上側に配置することで、ガスの吸い込みをし難くできる。 In addition, the condensation device 13 of the embodiment is provided with a drainage section 13F that discharges the condensed water 13H to the outside at the bottom of the storage tank 13A, and the drainage section 13F includes a drainage pipe 13Fa that extends upward at the bottom of the storage tank 13A and whose lower end leads to the outside of the storage tank 13A, a blocking section 13Fb that blocks the upper end of the drainage pipe 13Fa, and a through hole 13Fc formed in the peripheral wall of the drainage pipe 13Fa. Generally, when a drainage hole is provided at the bottom of the storage tank 13A, a vortex is generated by suction into the drainage hole, making it easier for gas to be discharged together with the condensed water 13H. In this regard, according to the condensation device 13 of the embodiment, the upper end of the drainage pipe 13Fa is blocked by the blocking section 13Fb, and a through hole 13Fc is formed in the peripheral wall of the drainage pipe 13Fa, so that the generation of a vortex due to suction can be suppressed. As a result, the condensation device 13 of the embodiment can prevent the gas from being discharged from the drain 13F together with the condensed water 13H, and can prevent problems such as breakage of the pump shaft. In addition, the cross-sectional area of the storage tank 13A decreases toward the bottom of the hemispherical bowl-shaped bottom, and the vertical water flow increases, so the degree of gas absorption is high. In this regard, according to the condensation device 13 of the embodiment, the through hole 13Fc is located above the drain pipe 13Fa, making it difficult for gas to be absorbed.

また、実施形態の凝縮装置１３では、貯留タンク１３Ａの内部に固定されてヘッダー管１３Ｂを水平方向への移動を許容して載置する支持部１３Ｊを備える。ここで、一般に、ヘッダー管１３Ｂを介してスパージャ管１３Ｄから高温のガスを噴出する構成にあっては、ヘッダー管１３Ｂが熱伸びを生じる。この点、実施形態の凝縮装置１３によれば、支持部１３Ｊによって、ヘッダー管１３Ｂが水平方向への移動を許容して載置されていることで、熱伸びに対してヘッダー管１３Ｂが拘束されず、支持構造に荷重が生じなどの影響を防止できる。 The condensation device 13 of the embodiment is also provided with a support 13J that is fixed inside the storage tank 13A and supports the header pipe 13B while allowing it to move horizontally. Generally, in a configuration in which high-temperature gas is ejected from the sparger pipe 13D via the header pipe 13B, the header pipe 13B undergoes thermal expansion. In this regard, according to the condensation device 13 of the embodiment, the header pipe 13B is supported by the support 13J while allowing it to move horizontally, so that the header pipe 13B is not restricted by thermal expansion, and effects such as load on the support structure can be prevented.

また、実施形態の凝縮装置１３では、ヘッダー管１３Ｂは、ガスの供給側である排気配管１２との間に開閉弁１３Ｃを介して複数に分岐して設けられ、ヘッダー管１３Ｂに送られるガスの圧力を検出する圧力検出部１０と、圧力検出部１０が検出する圧力に応じて各開閉弁１３Ｃを開閉制御する制御部２０と、を備える。 In addition, in the embodiment of the condensation device 13, the header pipe 13B is branched into multiple parts via on-off valves 13C between the header pipe 13B and the exhaust pipe 12, which is the gas supply side, and is equipped with a pressure detection unit 10 that detects the pressure of the gas sent to the header pipe 13B, and a control unit 20 that controls the opening and closing of each on-off valve 13C depending on the pressure detected by the pressure detection unit 10.

そして、実施形態の凝縮方法では、制御部２０は、圧力検出部１０が検出する圧力が上昇傾向にある場合に各開閉弁１３Ｃを開放制御する一方、圧力検出部１０が検出する圧力が下降傾向にある場合に各開閉弁１３Ｃの一部を閉鎖制御する。 In the condensation method of the embodiment, the control unit 20 controls each on-off valve 13C to be open when the pressure detected by the pressure detection unit 10 is on an upward trend, and controls some of the on-off valves 13C to be closed when the pressure detected by the pressure detection unit 10 is on a downward trend.

具体的に、実施形態の凝縮方法を、図６の実施形態に係る凝縮方法のフローチャートに示す。 Specifically, the condensation method of the embodiment is shown in the flowchart of the condensation method of the embodiment in Figure 6.

図６に示すように、制御部２０は、圧力検出部１０が検出する圧力を入力し、当該圧力が上昇傾向にある場合（ステップＳ１：Ｙｅｓ）、全ての開閉弁１３Ｃを開放制御する（ステップＳ２）。なお、制御部２０は、圧力が上昇傾向にない場合は（ステップＳ１：Ｎｏ）、圧力検出部１０が検出する圧力を入力し続ける。その後、制御部２０は、圧力検出部１０が検出する圧力を入力し続け、当該圧力が下降傾向にある場合（ステップＳ３：Ｙｅｓ）、一部の開閉弁１３Ｃを閉鎖制御する（ステップＳ４）。ステップＳ４において、具体的に、制御部２０は、上述した第一ヘッダー管１３Ｂ１と第二ヘッダー管１３Ｂ２とについて、例えば、第一ヘッダー管１３Ｂ１が接続される開閉弁１３Ｃを閉鎖制御し、第二ヘッダー管１３Ｂ２接続される開閉弁１３Ｃを開放制御する。なお、制御部２０は、圧力が下降傾向にない場合は（ステップＳ３：Ｎｏ）、圧力検出部１０が検出する圧力を入力し続ける。その後、制御部２０は、圧力検出部１０が検出する圧力を入力し続け、当該圧力が所定圧力Ｘ未満となった場合（ステップＳ５：Ｙｅｓ）、全ての開閉弁１３Ｃを閉鎖制御する（ステップＳ６）。なお、制御部２０は、圧力が所定圧力Ｘ以上の場合は（ステップＳ５：Ｎｏ）、圧力検出部１０が検出する圧力を入力し続ける。 6, the control unit 20 inputs the pressure detected by the pressure detection unit 10, and if the pressure is on the rise (step S1: Yes), controls all the on-off valves 13C to be open (step S2). If the pressure is not on the rise (step S1: No), the control unit 20 continues to input the pressure detected by the pressure detection unit 10. After that, the control unit 20 continues to input the pressure detected by the pressure detection unit 10, and if the pressure is on the fall (step S3: Yes), controls some of the on-off valves 13C to be closed (step S4). In step S4, specifically, for the first header pipe 13B1 and the second header pipe 13B2 described above, for example, the control unit 20 controls the on-off valve 13C connected to the first header pipe 13B1 to be closed, and controls the on-off valve 13C connected to the second header pipe 13B2 to be open. If the pressure is not on the fall (step S3: No), the control unit 20 continues to input the pressure detected by the pressure detection unit 10. Thereafter, the control unit 20 continues to input the pressure detected by the pressure detection unit 10, and when the pressure becomes less than the predetermined pressure X (step S5: Yes), controls all the on-off valves 13C to close (step S6). Note that when the pressure is equal to or greater than the predetermined pressure X (step S5: No), the control unit 20 continues to input the pressure detected by the pressure detection unit 10.

即ち、格納容器保全設備５０において、シビアアクシデント時に格納容器１００内の崩壊熱を徐熱するために冷却水がスプレイされ、冷却水が蒸発したガスによって格納容器１００の内部の圧力が上昇する（ステップＳ１：Ｙｅｓ）。そして、凝縮装置１３では、この圧力上昇を抑えるため格納容器１００から貯留タンク１３Ａにガスが送られる（ステップＳ２）。その後、凝縮装置１３は、格納容器１００の内部の圧力の上昇度合いが下がって上流側から流れてくる蒸気流量が少なくなった条件において（ステップＳ３：Ｙｅｓ）、分岐した一部のヘッダー管（第一ヘッダー管１３Ｂ１）を閉鎖することで（ステップＳ４）、スパージャ管１３Ｄの１本当たりの蒸気質量流束を低減することが可能となる。これにより、凝縮装置１３および凝縮方法によれば、チャギング現象を発生しにくくできる。この結果、凝縮装置１３および凝縮方法は、チャギング現象に伴う振動によるスパージャ管１３Ｄへの荷重影響を防ぐことができる。なお、凝縮装置１３は、格納容器１００の内部の圧力が格納容器１００の保全を確保可能な予め設定した圧力Ｘ未満になった条件において（ステップＳ５：Ｙｅｓ）、ガスを貯留タンク１３Ａに送ることを止める（ステップＳ６）。 That is, in the containment vessel maintenance equipment 50, cooling water is sprayed to remove the decay heat in the containment vessel 100 in the event of a severe accident, and the pressure inside the containment vessel 100 rises due to the gas generated by the evaporation of the cooling water (step S1: Yes). Then, in the condensation device 13, gas is sent from the containment vessel 100 to the storage tank 13A to suppress this pressure rise (step S2). After that, under conditions where the degree of pressure rise inside the containment vessel 100 decreases and the steam flow rate flowing from the upstream side decreases (step S3: Yes), the condensation device 13 closes a part of the branched header pipes (first header pipe 13B1) (step S4), thereby making it possible to reduce the steam mass flux per sparger pipe 13D. As a result, the condensation device 13 and the condensation method can make the chugging phenomenon less likely to occur. As a result, the condensation device 13 and the condensation method can prevent the load effect on the sparger pipe 13D due to the vibration associated with the chugging phenomenon. In addition, when the pressure inside the storage vessel 100 falls below a preset pressure X that ensures the integrity of the storage vessel 100 (step S5: Yes), the condenser 13 stops sending gas to the storage tank 13A (step S6).

上述した実施形態の凝縮装置１３および凝縮方法にあっては、格納容器保全設備５０に適用される例を説明したが、この限りではない。実施形態の凝縮装置１３および凝縮方法は、底部に凝縮水１３Ｈが貯留される貯留タンク１３Ａと、貯留タンク１３Ａの内部において凝縮水１３Ｈの水面より上の気相部に配置され貯留タンク１３Ａの外部から蒸気を含むガスが供給されるヘッダー管１３Ｂと、ヘッダー管１３Ｂから下方に延びた先端が凝縮水１３Ｈの液相部に配置される複数のスパージャ管１３Ｄと、を備える構成において、適用される。 The condensation device 13 and condensation method of the above-mentioned embodiment are applied to the containment vessel maintenance equipment 50, but are not limited thereto. The condensation device 13 and condensation method of the embodiment are applied to a configuration including a storage tank 13A in which condensed water 13H is stored at the bottom, a header pipe 13B that is disposed in a gas phase portion above the water surface of the condensed water 13H inside the storage tank 13A and to which gas containing steam is supplied from outside the storage tank 13A, and a plurality of sparger pipes 13D whose tips extending downward from the header pipe 13B are disposed in the liquid phase portion of the condensed water 13H.

１０圧力検出部
１３凝縮装置
１３Ａ貯留タンク
１３Ｂヘッダー管
１３Ｃ開閉弁
１３Ｄスパージャ管
１３Ｆ排水部
１３Ｆａ排水管
１３Ｆｂ閉塞部
１３Ｆｃ貫通孔
１３Ｈ凝縮水
１３Ｊ支持部
１３Ｋ接続部
１３Ｋｂ接合部材
１３Ｌａ開閉部
１３Ｌｂ弾性部材
１３Ｍ多孔板
２０制御部 REFERENCE SIGNS LIST 10 Pressure detection unit 13 Condenser 13A Storage tank 13B Header pipe 13C Opening/closing valve 13D Sparger pipe 13F Drainage unit 13Fa Drainage pipe 13Fb Blocking unit 13Fc Through hole 13H Condensed water 13J Support unit 13K Connection unit 13Kb Joint member 13La Opening/closing unit 13Lb Elastic member 13M Perforated plate 20 Control unit

Claims

a storage tank at the bottom of which condensed water is stored;
a header pipe disposed in a gas phase portion above the water level of the condensed water inside the storage tank and receiving a gas containing steam from outside the storage tank;
A plurality of sparger pipes, each having a tip extending downward from the header pipe and disposed in a liquid phase portion of the condensed water;
A connection portion that connects a plurality of the sparger pipes;
Equipped with
The condensation device, wherein the connection portion includes a flexible joint member provided at an attachment portion to each of the sparger pipes, and a main body member composed of a rigid member provided to connect only the joint members provided on the sparger pipes.

a storage tank at the bottom of which condensed water is stored;
a header pipe disposed in a gas phase portion above the water level of the condensed water inside the storage tank and receiving a gas containing steam from outside the storage tank;
A plurality of sparger pipes, each having a tip extending downward from the header pipe and disposed in a liquid phase portion of the condensed water;
A connection portion that connects a plurality of the sparger pipes;
Equipped with
A condensation device, wherein the connection portion is entirely flexible.

a storage tank at the bottom of which condensed water is stored;
a header pipe disposed in a gas phase portion above the water level of the condensed water inside the storage tank and receiving a gas containing steam from outside the storage tank;
A plurality of sparger pipes, each having a tip extending downward from the header pipe and disposed in a liquid phase portion of the condensed water;
A connection portion that connects a plurality of the sparger pipes;
a drainage section provided at the bottom of the storage tank for discharging the condensed water to the outside;
A perforated plate disposed between the sparger pipe and the drainage portion inside the storage tank so as to divide the storage tank into upper and lower parts;
A condensation device comprising:

a storage tank at the bottom of which condensed water is stored;
a header pipe disposed in a gas phase portion above the water level of the condensed water inside the storage tank and receiving a gas containing steam from outside the storage tank;
A plurality of sparger pipes, each having a tip extending downward from the header pipe and disposed in a liquid phase portion of the condensed water;
A connection portion that connects a plurality of the sparger pipes;
a drainage section at the bottom of the storage tank for draining the condensed water to the outside,
The drainage section of the condensation device includes a drainage pipe extending upward from the bottom of the storage tank and having a lower end leading to the outside of the storage tank, a blocking section that blocks the upper end of the drainage pipe, and a through hole formed in the peripheral wall of the drainage pipe.

a storage tank at the bottom of which condensed water is stored;
a header pipe disposed in a gas phase portion above the water level of the condensed water inside the storage tank and receiving a gas containing steam from outside the storage tank;
A plurality of sparger pipes, each having a tip extending downward from the header pipe and disposed in a liquid phase portion of the condensed water;
A connection portion that connects a plurality of the sparger pipes;
a support portion that is fixed inside the storage tank and supports the header pipe while allowing the header pipe to move in a horizontal direction.

a storage tank at the bottom of which condensed water is stored;
a header pipe disposed in a gas phase portion above the water level of the condensed water inside the storage tank and receiving a gas containing steam from outside the storage tank;
A plurality of sparger pipes, each having a tip extending downward from the header pipe and disposed in a liquid phase portion of the condensed water;
A connection portion that connects a plurality of the sparger pipes;
Equipped with
The header pipe is branched into a plurality of parts via an on-off valve between the header pipe and the gas supply side,
a pressure detection unit that detects the pressure of the gas sent to the header pipe;
a control unit that controls opening and closing of each of the on-off valves in response to the pressure detected by the pressure detection unit;
A condensation device comprising:

a storage tank at the bottom of which condensed water is stored;
a header pipe disposed in a gas phase portion above the water level of the condensed water inside the storage tank and receiving a gas containing steam from outside the storage tank;
A plurality of sparger pipes, each having a tip extending downward from the header pipe and disposed in a liquid phase portion of the condensed water;
Equipped with
The sparger pipe includes an opening/closing portion provided at a tip portion and an elastic member that elastically supports the opening/closing portion so as to close the opening/closing portion, and the opening/closing portion opens and closes against the elastic force of the elastic member due to the pressure of the gas.

a storage tank at the bottom of which condensed water is stored;
a header pipe arranged in a gas phase portion above the water level of the condensed water inside the storage tank, to which a gas containing steam is supplied from outside the storage tank, and which is branched into a plurality of header pipes via an on-off valve between the gas supply side and the header pipe;
A plurality of sparger pipes, each having a tip extending downward from the header pipe and disposed in a liquid phase portion of the condensed water;
a pressure detection unit that detects the pressure of the gas sent to the header pipe;
a control unit that controls opening and closing of each of the on-off valves in response to the pressure detected by the pressure detection unit;
A condensation method using a condensation device comprising:
The control unit controls each of the on-off valves to be open when the pressure detected by the pressure detection unit is on an upward trend, and controls some of the on-off valves to be closed when the pressure detected by the pressure detection unit is on a downward trend.