JPS6145197B2 - - Google Patents
Info
- Publication number
- JPS6145197B2 JPS6145197B2 JP55123924A JP12392480A JPS6145197B2 JP S6145197 B2 JPS6145197 B2 JP S6145197B2 JP 55123924 A JP55123924 A JP 55123924A JP 12392480 A JP12392480 A JP 12392480A JP S6145197 B2 JPS6145197 B2 JP S6145197B2
- Authority
- JP
- Japan
- Prior art keywords
- control rod
- filter
- drain
- housing
- exchanger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000001914 filtration Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000012535 impurity Substances 0.000 description 7
- 230000002285 radioactive effect Effects 0.000 description 5
- 206010073306 Exposure to radiation Diseases 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Monitoring And Testing Of Nuclear Reactors (AREA)
Description
【発明の詳細な説明】
本発明は、原子炉の制御棒交換時に制御棒ハウ
ジングから漏洩する水中の放射性不純物を除去
する制御棒交換機の過装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control rod exchange device for removing radioactive impurities in water leaking from a control rod housing during control rod exchange of a nuclear reactor.
一般に、原子炉における定期検査時、圧力容器
の炉心に装荷されている制御棒は交換される。即
ち、この制御棒の交換作業は、通常、圧力容器の
炉心に装荷された制御棒を圧力容器の上位に設け
られた巻上機の吊ロープで、把持ツールを介し
て、炉心から引抜いて交換するようになつている
けれども、この制御棒の下部が上記圧力容器の底
部に設けられた制御棒案内管と一体をなす制御棒
ハウジング内に挿入されているため、この制御棒
ハウジングの内周と制御棒の外周との間隙に塵埃
や水あかが附着すると、この制御棒が円滑に引抜
けない関係上、上記制御棒ハウジング内に挿着さ
れた制御棒駆動機構を制御棒交換機と称する制御
棒交換用のボルト脱着機を使用して取外し、しか
る後、この制御棒ハウジング内に制御棒押上げ装
置を挿入して制御棒を巻上機の吊ロープで引き上
げると共に、下方から上記制御棒押上げ装置で制
御棒を押上げ幇助するようになつている。 Generally, during periodic inspections of nuclear reactors, control rods loaded in the core of a pressure vessel are replaced. In other words, this control rod replacement work is normally done by pulling the control rods loaded into the core of the pressure vessel out of the core using a gripping tool using a hoisting rope installed above the pressure vessel. However, since the lower part of this control rod is inserted into a control rod housing that is integrated with the control rod guide tube provided at the bottom of the pressure vessel, the inner circumference of this control rod housing and If dust or water scale adheres to the gap between the control rod and the outer periphery, the control rod cannot be pulled out smoothly. Therefore, the control rod drive mechanism inserted into the control rod housing is called a control rod exchanger. After that, the control rod lifting device is inserted into the control rod housing and the control rod is pulled up with the hoisting rope of the hoisting machine, and the control rod lifting device is removed from below. The control rod is pushed up to provide assistance.
しかしながら、上記制御棒駆動機構は制御棒ハ
ウジングの下部にボルト等によつて設置されてい
るため、これを制御棒交換機で取外すとき、制御
棒ハウジング内に流入している放射化した炉水が
床面に漏洩してこれらが格納容器内を汚染するお
それがある。 However, since the control rod drive mechanism described above is installed at the bottom of the control rod housing with bolts, etc., when it is removed using a control rod exchanger, activated reactor water flowing into the control rod housing spills onto the floor. There is a risk that these substances may leak to surfaces and contaminate the inside of the containment vessel.
本発明は、上述した点に鑑み、制御棒交換機の
本体に排水カバーを設け、上記本体の一部に排水
孔を穿設し、この排水孔にフイルターを着脱自在
に挿着し、上記排水孔に排水ホースを附設し、こ
れにより、制御棒交換時、水中の放射性不純物
を安全に回収し、併せて、被曝することなく、放
射性不純物を簡単に過処理し得るようにしたこ
とを目的とする制御棒交換機の過装置を提供す
るものである。 In view of the above-mentioned points, the present invention provides a drain cover on the main body of a control rod exchanger, a drain hole is bored in a part of the main body, a filter is detachably inserted into the drain hole, and the drain cover is provided in the main body of the control rod exchanger. A drainage hose was attached to the tank to allow safe collection of radioactive impurities in the water when replacing control rods, and also to allow easy overtreatment of radioactive impurities without exposure to radiation. The present invention provides a control rod exchange device.
以下、本発明を図示の一実施例について説明す
る。 Hereinafter, the present invention will be described with reference to an illustrated embodiment.
第１図乃至第４図において、符号１は圧力容器
の底部に設けられ、しかも圧力容器の炉心にまで
延設された制御棒ハウジング（制御棒駆動機構ハ
ウジングともいう）であつて、この制御棒ハウジ
ング１の下部開口部１ａには周知の制御棒駆動機
構２が取付ボルト３によつて固着されている。 In FIGS. 1 to 4, reference numeral 1 denotes a control rod housing (also referred to as a control rod drive mechanism housing) provided at the bottom of the pressure vessel and extending to the core of the pressure vessel. A well-known control rod drive mechanism 2 is fixed to a lower opening 1a of the housing 1 with a mounting bolt 3.
一方、制御棒交換時には、上記制御棒駆動機構
２の下位には制御棒交換用ボルト脱着機による制
御棒交換機４の本体５が配設されており、この制
御棒交換機４の本体５の外周には筒状をなす排水
カバー６が上記制御棒ハウジング１の下部開口部
１ａの一部に弾発的に接触するようにして設けら
れている。又上記本体５の上部にはボルト着脱杆
７が可逆回転し得るようにして設けられており、
このボルト着脱杆７に近接した上記本体５には排
水孔８が垂直の向きに穿設されている。さらにこ
の排水孔８の上部流入口８ａには、第３図に拡大
して示されるように、フランジ９ａを備えた円錐
形をなすフイルター９が着脱自在に挿着されてお
り、このフイルター９は、制御棒ハウジング１内
の放射化した漏洩炉水の不純物を過するように
なつている。さらに又、上記排水孔８の下部流出
口８ｂには排水ホース１０が附設されており、こ
の排水ホース１０の下端部１０ａは格納容器１１
に設けられたピツト１２に延設されている。又、
上記制御棒駆動機構２を設置した制御棒ハウジン
グ１内には、第４図に拡大して示されるように、
フランジ１３ａを有し、しかも膨出部１３ｂを形
成したフイルター１３が設けられており、このフ
イルター１３は上記フイルター９と同じように、
水中の放射化した不純物を過するようになつ
ている。 On the other hand, when exchanging control rods, the main body 5 of the control rod exchanger 4 is provided below the control rod drive mechanism 2, and the main body 5 of the control rod exchanger 4 is equipped with a control rod exchange bolt detacher. A cylindrical drainage cover 6 is provided so as to resiliently contact a portion of the lower opening 1a of the control rod housing 1. Further, a bolt attachment/detachment rod 7 is provided on the upper part of the main body 5 so as to be able to rotate reversibly.
A drainage hole 8 is vertically bored in the main body 5 adjacent to the bolt attachment/detachment rod 7. Further, as shown in an enlarged view in FIG. 3, a conical filter 9 with a flange 9a is removably inserted into the upper inlet 8a of the drain hole 8. , the impurities of the activated leaked reactor water in the control rod housing 1 are filtered out. Furthermore, a drain hose 10 is attached to the lower outlet 8b of the drain hole 8, and the lower end 10a of the drain hose 10 is connected to the containment vessel 11.
It extends into a pit 12 provided in the. or,
Inside the control rod housing 1 in which the control rod drive mechanism 2 is installed, as shown in an enlarged view in FIG.
A filter 13 having a flange 13a and a bulge 13b is provided, and like the filter 9 described above, this filter 13 has the following features:
It has become possible to detect radioactive impurities in water.
従つて、今、圧力容器の定期検査時、上記制御
棒駆動機構２を取外すとき、上記制御棒交換機４
によつて行われる。即ち、この制御棒交換機４
を、第２図に示されるように制御棒駆動機構２の
下位に配設し、しかも、筒状をなす排水カバー６
を上記制御棒ハウジング１の下部開口部１ａの一
部に接触させる。次に、上記制御棒交換機４のボ
ルト脱着杆７を上記取付ボルト３に嵌合して回転
することにより、この取付ボルト３を取外す。こ
のとき制御棒ハウジング１内に漏洩した水の不
純物は、排水孔８のフイルター９によつて過さ
れ、このフイルター９を通つた水は排水ホース１
０を介してピツト１２へ排棄されるようになつて
いる。 Therefore, when the control rod drive mechanism 2 is removed during periodic inspection of the pressure vessel, the control rod exchanger 4
It is carried out by. That is, this control rod exchanger 4
is disposed below the control rod drive mechanism 2 as shown in FIG.
is brought into contact with a part of the lower opening 1a of the control rod housing 1. Next, the bolt attachment rod 7 of the control rod exchanger 4 is fitted onto the attachment bolt 3 and rotated to remove the attachment bolt 3. At this time, impurities in the water leaking into the control rod housing 1 are passed through the filter 9 of the drain hole 8, and the water that has passed through the filter 9 is passed through the drain hose 1.
0 to the pit 12.
以上述べたように本発明によれば、制御棒交換
機４の本体５に排水カバー６を設け、上記本体５
の一部に排水孔８を穿設し、この排水孔８にフイ
ルター９を着脱自在に挿着し、上記排水孔８に排
水ホース１０を附設してあるので、制御棒ハウジ
ング１内に漏洩した放射性不純物を有効に過す
ることができるばかりでなく、取扱い操作も簡単
であり、さらに被曝するおそれも少なくなる等の
優れた効果を有する。 As described above, according to the present invention, the drain cover 6 is provided on the main body 5 of the control rod exchanger 4, and the main body 5
A drain hole 8 is drilled in a part of the control rod housing 1, a filter 9 is removably inserted into the drain hole 8, and a drain hose 10 is attached to the drain hole 8. Not only can it effectively remove radioactive impurities, it is also easy to handle and has excellent effects such as reducing the risk of exposure to radiation.
第１図は本発明による制御棒交換機の過装置
の一部を破載して示す側面図、第２図は本発明の
主要部を拡大して示す図、第３図及び第４図は本
発明に使用される各フイルターの断面図である。
１……制御棒ハウジング、２……制御棒駆動機
構、３……取付ボルト、４……制御棒交換機、５
……本体、６……排水カバー、８……排水孔、９
……フイルター、１０……排水ホース。
FIG. 1 is a side view showing a part of the control rod exchanger according to the present invention, with the main part of the invention enlarged, and FIGS. FIG. 3 is a cross-sectional view of each filter used in the invention. 1...Control rod housing, 2...Control rod drive mechanism, 3...Mounting bolt, 4...Control rod exchanger, 5
...Body, 6...Drain cover, 8...Drain hole, 9
... Filter, 10 ... Drain hose.
Claims (1)
記本体の一部に排水孔を穿設し、この排水孔にフ
イルターを着脱自在に挿着し、上記排水孔に排水
ホースを附設したことを特徴とする制御棒交換機
の過装置。 ２ フイルターをフランジを備えた円錐形にした
ことを特徴とする特許請求の範囲第１項記載の制
御棒交換機の過装置。[Claims] 1. A drain cover is provided on the main body of the control rod exchanger, a drain hole is bored in a part of the main body, a filter is removably inserted into the drain hole, and a drain hose is inserted into the drain hole. A control rod exchange device characterized in that it is equipped with. 2. A filtering device for a control rod exchanger according to claim 1, wherein the filter has a conical shape with a flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55123924A JPS5748692A (en) | 1980-09-06 | 1980-09-06 | Filter device of control rod exchanging machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55123924A JPS5748692A (en) | 1980-09-06 | 1980-09-06 | Filter device of control rod exchanging machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5748692A JPS5748692A (en) | 1982-03-20 |
| JPS6145197B2 true JPS6145197B2 (en) | 1986-10-07 |
Family
ID=14872706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55123924A Granted JPS5748692A (en) | 1980-09-06 | 1980-09-06 | Filter device of control rod exchanging machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5748692A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60143127A (en) * | 1984-10-09 | 1985-07-29 | Honda Motor Co Ltd | Clutch release device for saddle type vehicles |
-
1980
- 1980-09-06 JP JP55123924A patent/JPS5748692A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5748692A (en) | 1982-03-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4336103A (en) | Method of repairing partly burnt-off fuel elements in the fuel-element pit pressurized water reactors and device therefor | |
| JPH0643293A (en) | How to adjust and recycle used ion cartridges | |
| JPS6145197B2 (en) | ||
| US4883588A (en) | Underwater filter system | |
| CA1141677A (en) | Bottom loaded filter for radioactive liquids | |
| CN105139911A (en) | Spent fuel storage pool bottom scrubbing device | |
| JPS6118478Y2 (en) | ||
| JP4387891B2 (en) | Contaminated water discharge jig with cable lead-out structure | |
| JP4421643B2 (en) | Resin discharging structure and discharging method of ion exchange resin tower | |
| JP5239416B2 (en) | Circulating filtration system for radioactive waste water and its filter replacement method | |
| JP4253137B2 (en) | Solid-liquid separator maintenance cask | |
| JP3668656B2 (en) | Fuel inspection device | |
| JP3197747B2 (en) | Reactor built-in recirculation pump top plug | |
| JPS59157596A (en) | Method and device for removing crud of reactor fuel pool | |
| JPS61278799A (en) | Processor for reactive fluid | |
| JPS6346879Y2 (en) | ||
| JPS6026997B2 (en) | Control rod drive filter cleaning device | |
| JP2006313134A (en) | Drum conceal type ion-exchange resin column | |
| JPH0584478B2 (en) | ||
| JPH01318997A (en) | Filter | |
| JPS589094A (en) | Cleaning device for Incore monitor installation part | |
| JPS6326360B2 (en) | ||
| KR20260048299A (en) | Canister for the disposal of hazardous radioactive waste in underground borehole storage | |
| JP2001051091A (en) | Underwater welding method for containment vessel | |
| JPS6032637Y2 (en) | Nuclear reactor plug insertion device |