JPS6318133B2 - - Google Patents
Info
- Publication number
- JPS6318133B2 JPS6318133B2 JP22065983A JP22065983A JPS6318133B2 JP S6318133 B2 JPS6318133 B2 JP S6318133B2 JP 22065983 A JP22065983 A JP 22065983A JP 22065983 A JP22065983 A JP 22065983A JP S6318133 B2 JPS6318133 B2 JP S6318133B2
- Authority
- JP
- Japan
- Prior art keywords
- permeable membrane
- hydrogen permeable
- temperature
- hydrogen
- heater
- 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
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 45
- 239000001257 hydrogen Substances 0.000 claims description 45
- 229910052739 hydrogen Inorganic materials 0.000 claims description 45
- 239000012528 membrane Substances 0.000 claims description 41
- 239000007789 gas Substances 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000012466 permeate Substances 0.000 claims 1
- 239000012530 fluid Substances 0.000 description 10
- 238000005070 sampling Methods 0.000 description 8
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 6
- 229910052708 sodium Inorganic materials 0.000 description 6
- 239000011734 sodium Substances 0.000 description 6
- 230000005855 radiation Effects 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 108010083687 Ion Pumps Proteins 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- NASFKTWZWDYFER-UHFFFAOYSA-N sodium;hydrate Chemical compound O.[Na] NASFKTWZWDYFER-UHFFFAOYSA-N 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N7/00—Analysing materials by measuring the pressure or volume of a gas or vapour
- G01N7/10—Analysing materials by measuring the pressure or volume of a gas or vapour by allowing diffusion of components through a porous wall and measuring a pressure or volume difference
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Examining Or Testing Airtightness (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明はカバーガス中水漏洩検出装置に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a water leakage detection device in a cover gas.
高速増殖炉の蒸気発生器では、伝熱管を介して
高温のナトリウムと水が接している。伝熱管にピ
ンホールやき裂が入り、伝熱管外に水が漏出する
水漏洩事故が発生すると、ナトリウム−水反応が
生じ、伝熱管の漏洩口の拡大（self−westage）
やさらに隣接の伝熱管への破損伝播（target−
westage）の危険性がある。
In the steam generator of a fast breeder reactor, high-temperature sodium and water come into contact through heat transfer tubes. When a pinhole or crack occurs in a heat exchanger tube and a water leakage accident occurs, a sodium-water reaction occurs and the leakage port of the heat exchanger tube expands (self-westage).
Furthermore, damage propagation to adjacent heat exchanger tubes (target-
westage).
そこで、この水漏洩事故を早期に、確実に検出
する手段として、ナトリウム−水反応により発生
する水素を検出する方法が有望視されている。水
素検出の為、一般に用いられているのが、ニツケ
ル膜等の水素透過性拡散膜を用いた水漏洩検出装
置である。水漏洩検出装置には、ナトリウム中の
水素を検出するものと、カバーガス中の水素を検
出するものの２種類がある。このうち、カバーガ
ス中水漏洩検出装置は、カバーガス空間やナトリ
ウム液面近傍およびダウンカマ部（ナトリウムの
スタグナント部）での水漏洩に対して有効と考え
られている。 Therefore, a method of detecting hydrogen generated by a sodium-water reaction is seen as a promising means for early and reliable detection of water leakage accidents. A water leak detection device that uses a hydrogen permeable diffusion membrane such as a nickel membrane is generally used to detect hydrogen. There are two types of water leak detection devices: one that detects hydrogen in sodium and one that detects hydrogen in cover gas. Among these, the water leakage detection device in the cover gas is considered to be effective against water leakage in the cover gas space, near the sodium liquid level, and in the downcomer part (sodium stagnant part).
従来例を第１図に示す。サンプリングした流体
１は、水素検出計３の入口２から入り、内筒７を
通過後、水素透過膜部１６に到り、内筒７と外筒
９の間のアニユラス空間１７を通つて出口１０よ
りサンプリング配管に戻される。真空室１１は水
素透過膜８で水素透過膜部１６と隔てられてお
り、動的測定用のイオンポンプ１３と真空計１２
が設置され、水素透過膜８を透過してくる水素に
よる圧力変化を測定し、水漏洩を検出する。水素
透過膜８の水素透過率には温度依存性（１℃で１
％の誤差）があり、水素透過膜の温度を一定に保
持する必要があるが、水素透過膜８は0.3〜0.5mm
程度と薄く、直接ヒータで加熱することはできな
い。従つて、水素透過膜８の上流側のサンプリン
グ流体１の温度を一定に制御して、水素透過膜８
の温度を制御する方法が採られている。すなわ
ち、内筒７内に流体１の加熱用ヒータ４を設置
し、水素透過膜部５の流体の温度を熱電対１５で
測定し、水素透過膜部５の流体の温度を一定に保
持するように、ヒータ４の出力を温度制御器６で
制御し、水素透過膜８の温度を一定に保持する。 A conventional example is shown in FIG. The sampled fluid 1 enters the hydrogen detector 3 from the inlet 2, passes through the inner cylinder 7, reaches the hydrogen permeable membrane section 16, passes through the annulus space 17 between the inner cylinder 7 and the outer cylinder 9, and exits at the outlet 10. The sample is then returned to the sampling pipe. The vacuum chamber 11 is separated from the hydrogen permeable membrane part 16 by a hydrogen permeable membrane 8, and is equipped with an ion pump 13 for dynamic measurement and a vacuum gauge 12.
is installed to measure pressure changes due to hydrogen passing through the hydrogen permeable membrane 8 and detect water leakage. The hydrogen permeability of the hydrogen permeable membrane 8 is temperature dependent (1 at 1°C).
% error), and it is necessary to maintain the temperature of the hydrogen permeable membrane constant, but the hydrogen permeable membrane 8 has an error of 0.3 to 0.5 mm.
It is so thin that it cannot be heated directly with a heater. Therefore, by controlling the temperature of the sampling fluid 1 on the upstream side of the hydrogen permeable membrane 8 to be constant, the hydrogen permeable membrane 8
A method is adopted to control the temperature of That is, a heater 4 for heating the fluid 1 is installed in the inner cylinder 7, and the temperature of the fluid in the hydrogen permeable membrane section 5 is measured with a thermocouple 15, so that the temperature of the fluid in the hydrogen permeable membrane section 5 is maintained constant. Next, the output of the heater 4 is controlled by the temperature controller 6 to maintain the temperature of the hydrogen permeable membrane 8 constant.
このような方式は、サンプリング流体がナトリ
ウムのように熱容量が大きく、熱伝導率が良い場
合には、水素透過膜８の温度を容易に制御でき
る。しかし、カバーガス中水漏洩検出装置のよう
にサンプリング流体がガス（Ar）である場合は、
ガスが水素透過膜部１６に輸送する熱量はナトリ
ウムの場合の1/3000、熱伝導率も1/2000程度とな
るため、水素透過膜８からの放熱が無視し得なく
なる。例えば、水素透過膜８と流体１および真空
室の壁１８との温度差が各々１℃の時の、流体か
ら水素透過膜への熱伝達率h1と水素透過膜から真
空室壁への熱伝達率h2を比較する。前者は円管内
層強制対流熱伝達の式（内筒７の径は十分に保守
的な10φを用いた）を、後者には輻射伝熱の式を
用いて計算すれば、h1〜8.8kcal／m2・ｈ・℃、
h2〜22.6kcal／m2・ｈ・℃となる。すなわち、h2
3h1となり、水素透過膜からの輻射による放熱
量がガスの輸送熱量と比較して約３倍大きく、水
素透過膜の温度制御がしにくいという欠点があ
る。 In such a system, when the sampling fluid has a large heat capacity and good thermal conductivity, such as sodium, the temperature of the hydrogen permeable membrane 8 can be easily controlled. However, when the sampling fluid is gas (Ar), such as in a cover gas water leak detection device,
Since the amount of heat transported by the gas to the hydrogen permeable membrane portion 16 is 1/3000 of that of sodium, and the thermal conductivity is also approximately 1/2000, the heat dissipation from the hydrogen permeable membrane 8 cannot be ignored. For example, when the temperature difference between the hydrogen permeable membrane 8 and the fluid 1 and the wall 18 of the vacuum chamber is 1°C, the heat transfer coefficient h 1 from the fluid to the hydrogen permeable membrane and the heat transfer rate from the hydrogen permeable membrane to the vacuum chamber wall are Compare the transmissibility h2 . If the former is calculated using the formula for forced convection heat transfer in the inner layer of a circular tube (the diameter of the inner cylinder 7 is a sufficiently conservative 10φ), and the latter is calculated using the formula for radiation heat transfer, h 1 ~ 8.8kcal is calculated. / m2・h・℃,
h2 ~ 22.6kcal/ m2・h・℃. i.e. h 2
3h 1 , and the amount of heat dissipated by radiation from the hydrogen permeable membrane is about three times larger than the amount of heat transported by the gas, which has the disadvantage that it is difficult to control the temperature of the hydrogen permeable membrane.
本発明の目的は、上記欠点をなくして水素透過
膜の温度を安定かつ容易に制御できるカバーガス
中水漏洩検出装置を提供するにある。
SUMMARY OF THE INVENTION An object of the present invention is to provide a water leakage detection device in a cover gas that eliminates the above drawbacks and can stably and easily control the temperature of a hydrogen permeable membrane.
本発明はカバーガス中水漏洩検出装置の検出計
の水素透過膜に対向する真空側容器壁に設置した
ヒータの出力を、水素透過膜の温度で一定に制御
することにより、上記目的を達成しようとしたも
のである。
The present invention aims to achieve the above object by controlling the output of a heater installed on the wall of the vacuum side container facing the hydrogen permeable membrane of the detector of the water leakage in cover gas detector to be constant at the temperature of the hydrogen permeable membrane. That is.
第２図に本発明の一実施例を示す。検出計３の
入口２から流入したガス１は、内筒７を通過後水
素透過膜部１６に到り、内筒７と外筒９間のアニ
ユラス部１７を通つて出口１０より流出する。水
素透過膜８の温度制御の為に、真空室外壁にヒー
タ１９を設置してある。ヒータ１９の出力は、水
素透過膜部５の温度を一定に保持するように温度
制御器６と電力調整器２０で制御される。本実施
例によれば、温度変動による誤差を従来例と同程
度に保つのに必要なヒータの容量が約1/3に低減
でき、ヒータの寿命も長くなる。逆にヒータの容
量が同じであれば、外乱による温度変動に対する
応答性が約３倍になる。また、内挿ヒータを取り
除くことができるため検出計の構造が簡単にな
り、検出計外部にヒータを設置できるため、メン
テナンスが容易になるという効果もある。
FIG. 2 shows an embodiment of the present invention. Gas 1 flowing in from the inlet 2 of the detector 3 passes through the inner cylinder 7 and reaches the hydrogen permeable membrane part 16, passes through the annulus part 17 between the inner cylinder 7 and the outer cylinder 9, and flows out from the outlet 10. In order to control the temperature of the hydrogen permeable membrane 8, a heater 19 is installed on the outer wall of the vacuum chamber. The output of the heater 19 is controlled by the temperature controller 6 and the power regulator 20 so as to keep the temperature of the hydrogen permeable membrane section 5 constant. According to this embodiment, the capacity of the heater required to maintain errors due to temperature fluctuations to the same level as the conventional example can be reduced to about 1/3, and the life of the heater can be extended. Conversely, if the capacity of the heater is the same, the responsiveness to temperature fluctuations due to external disturbances will be approximately three times greater. Furthermore, since the interpolation heater can be removed, the structure of the detector is simplified, and the heater can be installed outside the detector, making maintenance easier.
第３図は本発明の他の実施例を示したものであ
る。第２図と異なるのは、水素透過膜８の温度制
御のために、上流側のガスを加熱するヒータ４の
出力と真空室１１の容器壁に設置したヒータ１９
の出力を同時に制御する構成とした点にある。ヒ
ータ４とヒータ１９の出力は、温度制御器６と
各々に取付けられた電力調整器２０により、水素
透過膜部５の温度を一定に保持するように制御さ
れる。この実施例では、水素透過膜の上流側のガ
スの輸送熱量と、水素透過膜からの輻射による放
熱量の両方を制御することになり、水素透過膜の
より安定な温度制御が可能となる。また、ヒータ
４とヒータ１９に各々独立に電力調整器２０を設
置することにより、１台の温度制御器で両ヒータ
を制御することができる。従つて、両ヒータの最
適な出力配分（この場合、ヒータ４容量：ヒータ
１９容量＝３：１）を任意に設定することがで
き、サンプリング流量やサンプリングガス温度を
任意に設定しても、電力調整器で両ヒータの出力
を調整することにより、水素透過膜の温度を容易
に制御することが可能となる。 FIG. 3 shows another embodiment of the invention. What is different from FIG. 2 is the output of the heater 4 that heats the gas on the upstream side and the heater 19 installed on the container wall of the vacuum chamber 11 in order to control the temperature of the hydrogen permeable membrane 8.
The point is that the configuration is such that the outputs of both are controlled simultaneously. The outputs of the heaters 4 and 19 are controlled by a temperature controller 6 and a power regulator 20 attached to each so as to maintain the temperature of the hydrogen permeable membrane section 5 constant. In this embodiment, both the amount of heat transported by the gas on the upstream side of the hydrogen permeable membrane and the amount of heat dissipated by radiation from the hydrogen permeable membrane are controlled, making it possible to control the temperature of the hydrogen permeable membrane more stably. Furthermore, by independently installing power regulators 20 for the heaters 4 and 19, both heaters can be controlled by one temperature controller. Therefore, the optimal output distribution between both heaters (in this case, heater 4 capacity: heater 19 capacity = 3:1) can be set arbitrarily, and even if the sampling flow rate and sampling gas temperature are set arbitrarily, the power By adjusting the output of both heaters with a regulator, it becomes possible to easily control the temperature of the hydrogen permeable membrane.
以上説明したように本発明によれば、カバーガ
ス中水漏洩検出装置の水素透過膜の温度を安定か
つ容易に制御できる。
As described above, according to the present invention, it is possible to stably and easily control the temperature of the hydrogen permeable membrane of the water in cover gas leak detection device.
第１図は従来のサンプリング型水漏洩検出装置
の構成図、第２図、第３図は本発明による実施例
の構成図である。
１……サンプリング流体、２……検出計入口、
３……検出計本体、４……内挿ヒータ、６……温
度制御器、７……内筒、８……水素透過膜、９…
…外筒、１０……検出計出口、１１……真空室、
１２……真空計、１３……イオンポンプ、１５…
…熱電対、１８……真空室壁、１９……ヒータ、
２０……電力調整器、２１……ガード、２２……
液体金属（Li）、２３……フランジ、２４……水
素透過膜壁。
FIG. 1 is a configuration diagram of a conventional sampling type water leak detection device, and FIGS. 2 and 3 are configuration diagrams of an embodiment according to the present invention. 1... Sampling fluid, 2... Detector inlet,
3... Detector body, 4... Inserted heater, 6... Temperature controller, 7... Inner cylinder, 8... Hydrogen permeable membrane, 9...
... Outer cylinder, 10 ... Detector outlet, 11 ... Vacuum chamber,
12... Vacuum gauge, 13... Ion pump, 15...
...Thermocouple, 18... Vacuum chamber wall, 19... Heater,
20... Power regulator, 21... Guard, 22...
Liquid metal (Li), 23... flange, 24... hydrogen permeable membrane wall.
Claims (1)
と、該透過膜を内部に含み、該透過膜と容器の間
の空間が真空側となるように、該透過膜を境にし
て、ガス側と真空側に分離された筒状の容器、お
よび該透過膜の温度を検出する手段とからなるカ
バーガス中水漏洩検出装置において、該透過膜に
対向する真空側容器壁に設置した加熱手段の入力
を、該透過膜の温度の検出値を用いて制御するこ
とを特徴とするカバーガス中水素検出装置。1 A cylindrical permeable membrane that allows hydrogen in the gas to permeate; In a cover gas water leak detection device consisting of a cylindrical container separated into a vacuum side and a means for detecting the temperature of the permeable membrane, the heating means installed on the wall of the vacuum side container facing the permeable membrane. An apparatus for detecting hydrogen in a cover gas, characterized in that an input is controlled using a detected value of the temperature of the permeable membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22065983A JPS60113129A (en) | 1983-11-25 | 1983-11-25 | Detector for hydrogen in cover gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22065983A JPS60113129A (en) | 1983-11-25 | 1983-11-25 | Detector for hydrogen in cover gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60113129A JPS60113129A (en) | 1985-06-19 |
| JPS6318133B2 true JPS6318133B2 (en) | 1988-04-16 |
Family
ID=16754432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22065983A Granted JPS60113129A (en) | 1983-11-25 | 1983-11-25 | Detector for hydrogen in cover gas |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60113129A (en) |
-
1983
- 1983-11-25 JP JP22065983A patent/JPS60113129A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60113129A (en) | 1985-06-19 |
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