JPH0224460B2 - - Google Patents
Info
- Publication number
- JPH0224460B2 JPH0224460B2 JP58151053A JP15105383A JPH0224460B2 JP H0224460 B2 JPH0224460 B2 JP H0224460B2 JP 58151053 A JP58151053 A JP 58151053A JP 15105383 A JP15105383 A JP 15105383A JP H0224460 B2 JPH0224460 B2 JP H0224460B2
- Authority
- JP
- Japan
- Prior art keywords
- hydrogen
- metal
- temperature
- measuring
- electrical resistance
- 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 - Lifetime
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
Description
【発明の詳細な説明】
発明の背景
発明の属する技術分野
本発明は高温・高圧水蒸気中の水素濃度を測定
する装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for measuring hydrogen concentration in high-temperature, high-pressure steam.
従来技術の説明
軽水炉では燃料被覆管にジルカロイを使用して
おり、このジルカロイと水（又は水蒸気）との反
応により水素ガスが生成し、これが一次冷却水中
に存在することが予想される。事実1979年に発生
した米国スリーマイルズ島（TMI）の原子炉事
故においては一次冷却水系内での水素爆発が検出
されている。従つて、高温・高圧水蒸気中の水素
の存在量、即ち水素濃度を測定する方法および装
置が必要であるが、かかる技術はいまだ開発され
ていない。Description of the Prior Art In light water reactors, Zircaloy is used for fuel cladding tubes, and hydrogen gas is generated by the reaction of this Zircaloy with water (or steam), and it is expected that this gas will be present in the primary cooling water. In fact, in the nuclear reactor accident at Three Miles Island (TMI) in the United States that occurred in 1979, a hydrogen explosion was detected in the primary cooling water system. Therefore, there is a need for a method and apparatus for measuring the amount of hydrogen present in high-temperature, high-pressure steam, that is, the hydrogen concentration, but such technology has not yet been developed.
発明の要約
本発明の目的は高温・高圧水蒸気中の水素濃度
を測定する装置を提供することである。SUMMARY OF THE INVENTION An object of the present invention is to provide an apparatus for measuring hydrogen concentration in high temperature, high pressure steam.
本発明の別の目的は軽水炉一次冷却水等の高
温・高圧水蒸気中で発生した水素濃度を測定する
ことにより燃料被覆管ジルカロイの腐食を防止す
ると共に事故時等の水素爆発を防止しひいては原
子炉の安全性を高めることである。 Another object of the present invention is to prevent corrosion of Zircaloy fuel cladding tubes and prevent hydrogen explosions in the event of an accident by measuring the hydrogen concentration generated in high-temperature, high-pressure steam such as light water reactor primary cooling water. The goal is to improve safety.
本発明のより特定的な目的は高温・高圧水蒸気
中で発生した水素ガスを焼結金属で支持された水
素透過能の大きな金属薄膜を透過させ、内部に設
置した水素吸収能の大きな金属線に吸収させ、こ
の金属線の電気抵抗の増加量を測定することによ
り吸収水素量を求めることから成る水蒸気中の水
素濃度を測定する装置を提供することである。 A more specific purpose of the present invention is to allow hydrogen gas generated in high-temperature, high-pressure steam to pass through a metal thin film with a high hydrogen permeability supported by sintered metal, and to pass through a metal wire with a high hydrogen absorption capacity installed inside. An object of the present invention is to provide an apparatus for measuring the hydrogen concentration in water vapor, which consists of determining the amount of hydrogen absorbed by absorbing hydrogen and measuring the amount of increase in the electrical resistance of the metal wire.
本発明の更に特定的な目的は(イ)焼結金属で画定
された小室；(ロ)該焼結金属で支持され該焼結金属
の外表面を被覆する水素透過能の大きな金属薄
膜；(ハ)該小室内に設置されている電気抵抗被測定
用線および(ニ)電気抵抗測定装置から主として構成
される高温・高圧水蒸気中の水素濃度を測定する
装置を提供することである。 More specific objects of the present invention are (a) a small chamber defined by sintered metal; (b) a metal thin film with a high hydrogen permeability supported by the sintered metal and covering the outer surface of the sintered metal; It is an object of the present invention to provide a device for measuring the hydrogen concentration in high-temperature, high-pressure steam, which is mainly composed of (c) a wire to be measured for electrical resistance installed in the small chamber and (d) an electrical resistance measuring device.
本発明の別の目的および利点は以下遂次明らか
にされる。 Other objects and advantages of the present invention will become apparent below.
発明の詳細な説明
本発明は、高温・高圧水蒸気中で発生した水素
ガスを焼結金属で支持された水素透過能の大きな
金属薄膜を透過させ、内部に設置した水素吸収能
の大きな金属線に吸収させ、ついでこの金属線の
電気抵抗の増加量を測定することにより吸収水素
量を求めることから成る水蒸気中の水素濃度を測
定する装置に関する。Detailed Description of the Invention The present invention allows hydrogen gas generated in high-temperature, high-pressure steam to permeate through a metal thin film with a high hydrogen permeability supported by sintered metal, and to pass through a metal wire with a high hydrogen absorption capacity installed inside. The present invention relates to an apparatus for measuring the hydrogen concentration in water vapor, which comprises absorbing hydrogen and then determining the amount of absorbed hydrogen by measuring the amount of increase in the electrical resistance of the metal wire.
更に、本発明は(イ)焼結金属で画定された小室；
(ロ)該焼結金属で支持され該焼結金属の外表面を被
覆する水素透過能の大きな金属薄膜；(ハ)該小室内
に設置されている電気抵抗被測定用線および(ニ)電
気抵抗測定装置から主として構成される高温・高
圧水蒸気中の水素濃度を測定する装置に関する。 Further, the present invention provides (a) a chamber defined by sintered metal;
(b) A metal thin film with high hydrogen permeability that is supported by the sintered metal and covers the outer surface of the sintered metal; (c) A wire to be measured for electrical resistance installed in the small chamber and (d) Electrical The present invention relates to a device for measuring hydrogen concentration in high-temperature, high-pressure steam, which mainly consists of a resistance measuring device.
本発明の構成を図面に基づいて説明する。 The configuration of the present invention will be explained based on the drawings.
図は本発明の装置の一具体例の縦断面図であ
る。 The figure is a longitudinal sectional view of a specific example of the device of the present invention.
図において、は水素透過能の大きな金属薄
膜、は焼結金属、は電気抵抗被測定用線、
はヒーター線での温度を一定に保つためのもの
である。は熱電対での温度の検出のためのも
のであり、は本装置を高温・高圧水蒸気中へ保
持するとともに、電気抵抗測定装置と接続するた
めの電気リード線類を外部に取り出すためのチユ
ーブである。 In the figure, is a thin metal film with high hydrogen permeability, is a sintered metal, is the electrical resistance wire to be measured,
is to keep the temperature at the heater wire constant. is for detecting temperature with a thermocouple, and is a tube for holding this device in high-temperature, high-pressure steam and for taking out electrical lead wires for connection to an electrical resistance measuring device. be.
高温・高圧水蒸気（軽水炉一次冷却水の場合約
350℃、80〜120気圧）中で発生した水素ガスは、
の金属薄膜を拡散透過し、の焼結金属の空孔
を通しての電気抵抗被測定用金属線に吸収され
る。の金属線は水素を吸収することにより電気
抵抗が増加するのでこの増加量より吸収した水素
量を求める。の金属線の電気抵抗はその温度に
より変動するため、のヒーターで温度を一定に
保持する。吸収水素量の検出限度は、その温度制
御の度合いと密接に関連する。次に予め測定した
校正データーに基ずき吸収した水素量から、高
温・高圧水蒸気中の水素濃度が測定される。 High temperature/high pressure steam (approx. for light water reactor primary cooling water)
Hydrogen gas generated at 350℃ and 80 to 120 atmospheres is
It diffuses through the thin metal film and is absorbed by the metal wire to be measured for electrical resistance through the pores of the sintered metal. Since the electrical resistance of the metal wire increases as it absorbs hydrogen, the amount of absorbed hydrogen is determined from this increase. The electrical resistance of the metal wire changes depending on its temperature, so the temperature is kept constant with the heater. The detection limit of the amount of absorbed hydrogen is closely related to the degree of temperature control. Next, the hydrogen concentration in the high-temperature, high-pressure steam is measured from the amount of absorbed hydrogen based on the calibration data measured in advance.
本発明の装置で使用する最外被覆層の金属薄膜
の厚さと面積は水素濃度検出の応答速度と密接
に関連するが、高温水中で表面に酸化被覆を作ら
ず水素透過能の大きな金属で、水素脆化が生じな
いもの、例えばPd−Ag合金やNi等が好ましい。
の焼結金属はの金属薄膜を周囲の水蒸気の高
圧から守るためのものであり水素の拡散透過の障
害にはならない。この厚さは水蒸気圧力に十分耐
えるように設計され、その形状はチユーブ状が好
ましく、材質はNiあるいはSusが好ましい。の
電気抵抗被測定用線はPd，Ｖ，Ti等水素吸収能
の大きな金属が好ましい。 The thickness and area of the metal thin film of the outermost coating layer used in the device of the present invention are closely related to the response speed of hydrogen concentration detection. It is preferable to use a material that does not cause hydrogen embrittlement, such as a Pd-Ag alloy or Ni.
The purpose of the sintered metal is to protect the thin metal film from the high pressure of surrounding water vapor, and it does not impede the diffusion and permeation of hydrogen. This thickness is designed to sufficiently withstand water vapor pressure, the shape is preferably tube-like, and the material is preferably Ni or Sus. The wire to be measured for electrical resistance is preferably a metal with a large hydrogen absorption capacity, such as Pd, V, or Ti.
上述した構成の装置を使用することによつて、
従来直接知ることが出来なかつた軽水炉一次冷却
水（水蒸気）中の水素濃度を測定することが出来
る。これにより燃料被覆管ジルカロイの腐食防止
に役立つとともに、事故時等に素速やく水素濃度
を検出し水素爆発防止に役立ち、原子炉の安全性
を高めることができる。また、たとえの金属膜
に欠陥が生じて、水蒸気が内部に浸入した場合で
も、他の装置類に被害を及ぼすことはない。 By using the device configured as described above,
It is now possible to measure the hydrogen concentration in the primary cooling water (steam) of a light water reactor, which was previously impossible to measure directly. This not only helps prevent corrosion of the Zircaloy fuel cladding tube, but also helps prevent hydrogen explosions by quickly detecting hydrogen concentration in the event of an accident, increasing reactor safety. Furthermore, even if a defect occurs in the metal film and water vapor infiltrates into the interior, it will not cause damage to other equipment.
図は本発明の装置の一例の縦断面図である。 The figure is a longitudinal sectional view of an example of the device of the present invention.
Claims (1)
素透過能の大きな金属薄膜を透過させ、内部に設
置した水素吸収能の大きな電気抵抗被測定用金属
線に吸収させ、ついでこの金属線の電気抵抗の増
加量を測定することにより吸収水素量を求めるこ
とから成る水蒸気中の水素濃度を測定する装置に
おいて、前記装置が (イ) 焼結金属で画定された小室、 (ロ) 焼結金属で支持され、前記焼結金属の外表面
を被覆する水素透過能の大きな金属薄膜、 (ハ) 前記小室内に設置されている電気抵抗被測定
用金属線、 (ニ) 前記金属線の温度を一定に保持するための加
熱手段、及び (ホ) 前記金属線の温度を測定するための温度測定
手段から主として構成されることを特徴とする
装置。[Scope of Claims] 1. Hydrogen gas generated in high-temperature, high-pressure steam is passed through a metal thin film with a high hydrogen permeability, absorbed by a metal wire to be measured with electrical resistance and a high hydrogen absorption capacity installed inside, and then In a device for measuring the hydrogen concentration in water vapor, which consists of determining the amount of absorbed hydrogen by measuring the amount of increase in the electrical resistance of the metal wire, the device comprises (a) a small chamber defined by sintered metal; ) a metal thin film with a high hydrogen permeability supported by a sintered metal and covering the outer surface of the sintered metal; (c) a metal wire for electrical resistance measurement installed in the small chamber; (d) the metal. An apparatus characterized in that it mainly comprises a heating means for keeping the temperature of the metal wire constant; and (e) a temperature measuring means for measuring the temperature of the metal wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15105383A JPS6042647A (en) | 1983-08-19 | 1983-08-19 | Method and device for measuring concentration of hydrogen in high temperature and high pressure steam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15105383A JPS6042647A (en) | 1983-08-19 | 1983-08-19 | Method and device for measuring concentration of hydrogen in high temperature and high pressure steam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6042647A JPS6042647A (en) | 1985-03-06 |
| JPH0224460B2 true JPH0224460B2 (en) | 1990-05-29 |
Family
ID=15510265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15105383A Granted JPS6042647A (en) | 1983-08-19 | 1983-08-19 | Method and device for measuring concentration of hydrogen in high temperature and high pressure steam |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6042647A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7563022B2 (en) * | 2003-11-28 | 2009-07-21 | Ontario Power Generation Inc. | Methods and apparatus for inspecting reactor pressure tubes |
| JP4714825B2 (en) * | 2005-03-01 | 2011-06-29 | 国立大学法人東北大学 | Dissolved hydrogen sensor using metal thin film |
| JP6784486B2 (en) * | 2015-10-13 | 2020-11-11 | 株式会社ミクニ | Hydrogen sensor and its manufacturing method |
| JP6585463B2 (en) * | 2015-10-23 | 2019-10-02 | 株式会社東芝 | Hydrogen concentration measuring device for nuclear facilities |
| JP6526587B2 (en) * | 2016-03-10 | 2019-06-05 | 株式会社東芝 | Hydrogen sensor system |
| JP6799474B2 (en) * | 2017-02-07 | 2020-12-16 | 株式会社東芝 | Hydrogen sensor |
| JP2018138876A (en) * | 2017-02-24 | 2018-09-06 | 株式会社東芝 | Hydrogen concentration measuring element and hydrogen concentration measuring device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5550148A (en) * | 1978-10-06 | 1980-04-11 | Hitachi Ltd | Hydrogen concentration detecting method and device |
-
1983
- 1983-08-19 JP JP15105383A patent/JPS6042647A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6042647A (en) | 1985-03-06 |
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