JPS6111397B2 - - Google Patents
Info
- Publication number
- JPS6111397B2 JPS6111397B2 JP54143308A JP14330879A JPS6111397B2 JP S6111397 B2 JPS6111397 B2 JP S6111397B2 JP 54143308 A JP54143308 A JP 54143308A JP 14330879 A JP14330879 A JP 14330879A JP S6111397 B2 JPS6111397 B2 JP S6111397B2
- Authority
- JP
- Japan
- Prior art keywords
- center electrode
- voltage
- container
- terminal
- fuel
- 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
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、液体金属を冷却材とする原子力発電
装置における燃料棒の破損検出に使用される破損
燃料検出器に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a damaged fuel detector used for detecting damage to fuel rods in a nuclear power generation device that uses liquid metal as a coolant.
原子力発電装置の燃料（酸化ウラン）は完全に
密封された容器に収納されて使用される。この容
器が破損（ピンホールも含む）した場合は発電装
置の安全上ただちに交換を行なわなければならな
い。この破損検出は、燃料が核分裂して生成した
放射性生成物が冷却材に放出されることに着目
し、原子炉循環系の適当個所で放射性生成物を検
出することにより行なわれる。冷却材は液体金属
（主としてナトリウム）が使用され、液体金属を
空気から遮断するためにカバーガス（主としてア
ルゴンガス）を使用するが、通常このカバーガス
は清浄にするためにフイルタ等を通して循環して
おり、燃料破損時の放射性生成物はカバーガス中
に移行するので、このカバーガス循環系で破損燃
料検出を行なう。 The fuel (uranium oxide) used in nuclear power generation equipment is stored in completely sealed containers. If this container is damaged (including pinholes), it must be replaced immediately for the safety of the generator. This damage detection is carried out by focusing on the fact that radioactive products generated by nuclear fission of the fuel are released into the coolant, and by detecting radioactive products at appropriate locations in the reactor circulation system. Liquid metal (mainly sodium) is used as the coolant, and a cover gas (mainly argon gas) is used to isolate the liquid metal from the air, but this cover gas is usually circulated through a filter etc. to clean it. When the fuel is damaged, radioactive products migrate into the cover gas, so damaged fuel is detected in this cover gas circulation system.
通常カバーガス循環系に破損燃料検出用バイパ
ス配管を設け、第１図に示すような破損燃料検出
器にカバーガスを導く。破損燃料検出器はガス導
入管１と排出管２を有し、カバーガス容器３を通
つて流れる。容器３は外筒４と中心電極５および
この中心電極５を外筒４と絶縁するための絶縁体
６から構成される。流入したカバーガス（サンプ
ルガス）中に放射性生成物が含まれている場合、
中心電極５に外筒４に対して負極性の電圧を印加
しておくと、放射性生成物中の正電荷を持つた放
射性核種（主としてKr88、Xe138）は中心電極５に
付着する。ある定められた時間後、流入ガスをサ
ンプルガスから純アルゴンガスに切換え、且つ中
心電極５に正極性電圧を印加すると破損燃料検出
器は通常の比例計数管として動作するため、中心
電極５に付着した放射性核種の量を測定すること
ができ、この測定値より破損燃料検出を行なうこ
とができる。 Usually, a bypass pipe for detecting damaged fuel is provided in the cover gas circulation system, and the cover gas is guided to a damaged fuel detector as shown in FIG. The broken fuel detector has a gas inlet pipe 1 and an outlet pipe 2, which flow through a cover gas container 3. The container 3 is composed of an outer cylinder 4, a center electrode 5, and an insulator 6 for insulating the center electrode 5 from the outer cylinder 4. If the inflowing cover gas (sample gas) contains radioactive products,
When a negative voltage is applied to the center electrode 5 with respect to the outer cylinder 4, positively charged radionuclides (mainly Kr 88 and Xe 138 ) in the radioactive product adhere to the center electrode 5 . After a certain predetermined time, when the inflow gas is switched from the sample gas to pure argon gas and a positive polarity voltage is applied to the center electrode 5, the damaged fuel detector operates as a normal proportional counter tube, so that the fuel adheres to the center electrode 5. It is possible to measure the amount of radionuclides that have been released, and from this measurement value it is possible to detect damaged fuel.
上記のような破損燃料検出器を燃料棒の破損燃
料検出に使用する場合、破損燃料検出器自体の健
全性を常に自己チエツクし、異常になつた場合は
直ちに修復、交換を行なわなければならない。こ
の破損燃料検出器の場合、故障モードは中心電極
の断線である。 When using a damaged fuel detector as described above to detect damaged fuel in a fuel rod, it is necessary to constantly self-check the soundness of the damaged fuel detector itself, and if it becomes abnormal, it must be repaired or replaced immediately. In the case of this damaged fuel detector, the failure mode is a break in the center electrode.
本発明は、中心電極の断線検知機能を具備した
破損燃料検出器を提供することを目的とする。こ
のため本発明では、中心電極の信号出力端と反対
の端末に断線検知用端子を設け、この端子にその
電圧をモニタする電圧モニタを接続し、この電圧
モニタの出力喪失により中心電極の断線を検知し
て警報を発するようにして所期の目的を達成し
た。 SUMMARY OF THE INVENTION An object of the present invention is to provide a damaged fuel detector having a function of detecting disconnection of a center electrode. For this reason, in the present invention, a disconnection detection terminal is provided at the terminal opposite to the signal output end of the center electrode, a voltage monitor for monitoring the voltage is connected to this terminal, and a disconnection of the center electrode is detected by loss of the output of this voltage monitor. The intended purpose was achieved by detecting and issuing an alarm.
以下、図面を参照して本発明の実施例を説明す
る。第２図は本発明による破損燃料検出器の一実
施例を示すブロツク接続図である。第２図におい
て、破損燃料検出器１１の中心電極１５の一端の
信号出力用端子１２には電源１３の負極側が接続
され、この電源１３の正極側は破損燃料検出器の
外筒１４に接続され。中心電極１５の信号出力端
と反対側の端末に断線検知用端子１６を設け、こ
の端子１６にその電圧をモニタする電圧モニタ１
７が接続され、この電圧モニタ１７の出力側は警
報表示器１８に接続される。 Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a block diagram showing one embodiment of the damaged fuel detector according to the present invention. In FIG. 2, the negative electrode side of a power source 13 is connected to the signal output terminal 12 at one end of the center electrode 15 of the damaged fuel detector 11, and the positive electrode side of this power source 13 is connected to the outer cylinder 14 of the damaged fuel detector. . A disconnection detection terminal 16 is provided at the terminal opposite to the signal output terminal of the center electrode 15, and a voltage monitor 1 that monitors the voltage is provided at this terminal 16.
7 is connected, and the output side of this voltage monitor 17 is connected to an alarm indicator 18.
上記のように構成された本発明一実施例の破損
燃料検出器１１によれば、電圧モニタ１７により
断線検知用端子１６の電圧を常時モニタすること
により中心電極１５の断線を検知することができ
る。すなわち、中心電極１５には常時電圧が印加
されているため、もし電圧モニタ１７の出力がな
くなれば、これは中心電極１５の断線と判定さ
れ、警報表示器１８により警報を発する。 According to the damaged fuel detector 11 of the embodiment of the present invention configured as described above, a disconnection of the center electrode 15 can be detected by constantly monitoring the voltage of the disconnection detection terminal 16 using the voltage monitor 17. . That is, since a voltage is constantly applied to the center electrode 15, if the output of the voltage monitor 17 disappears, this is determined to be a disconnection of the center electrode 15, and the alarm indicator 18 issues an alarm.
以上詳述したように本発明によれば、故障モー
ドの中心である中心電極の断線検知機能を具備し
た破損燃料検出器を提供することができ、原子力
発電装置における燃料棒の破損検出の信頼性向上
に寄与するところが大きい。 As described in detail above, according to the present invention, it is possible to provide a damaged fuel detector equipped with a function of detecting disconnection of the center electrode, which is the center of failure mode, thereby increasing the reliability of fuel rod damage detection in nuclear power generation equipment. It greatly contributes to improvement.
第１図は破損燃料検出器の一般的構造を示す断
面図、第２図は本発明による破損燃料検出器の一
実施例の構成を示すブロツク接続図である。
１１……破損燃料検出器、１２……信号出力用
端子、１４……外筒、１５……中心電極、１６…
…断線検知用端子、１７……電圧モニタ、１８…
…警報表示器。
FIG. 1 is a sectional view showing the general structure of a damaged fuel detector, and FIG. 2 is a block connection diagram showing the structure of one embodiment of the damaged fuel detector according to the present invention. DESCRIPTION OF SYMBOLS 11... Damaged fuel detector, 12... Signal output terminal, 14... Outer cylinder, 15... Center electrode, 16...
...Disconnection detection terminal, 17...Voltage monitor, 18...
...Alarm indicator.
Claims (1)
ら絶縁されて容器の軸線方向に張設され容器に対
し負極性の電圧が印加される中心電極とを具備
し、液体金属を冷却材とする原子力発電装置にお
ける前記液体金属のカバーガスをサンプルガスと
して所定時間流通させた後純アルゴンガスに切換
え且つ中心電極に正極性電圧を印加して前記中心
電極に付着したサンプルガス中の放射性核種の量
を測定して燃料棒の破損を検出する破損燃料検出
器において、前記中心電極の信号出力端と反対の
端末に断線検知用端子を設けこの端子にその電圧
をモニタする電圧モニタを接続してこの電圧モニ
タの出力喪失により前記中心電極の断線を検知す
る機能を具えたことを特徴とする破損燃料検出
器。1. A nuclear power generation device that uses liquid metal as a coolant, and is equipped with a container through which sample gas flows, and a center electrode that is insulated from the container and stretched in the axial direction of the container, and applies a voltage of negative polarity to the container. After flowing the liquid metal cover gas as a sample gas for a predetermined time, switching to pure argon gas and applying a positive polarity voltage to the center electrode to measure the amount of radionuclides in the sample gas attached to the center electrode. In a broken fuel detector that detects damage to fuel rods, a disconnection detection terminal is provided at the terminal opposite to the signal output terminal of the center electrode, and a voltage monitor for monitoring the voltage is connected to this terminal. A damaged fuel detector comprising a function of detecting disconnection of the center electrode due to loss of output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14330879A JPS5667796A (en) | 1979-11-07 | 1979-11-07 | Failed fuel eetector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14330879A JPS5667796A (en) | 1979-11-07 | 1979-11-07 | Failed fuel eetector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5667796A JPS5667796A (en) | 1981-06-08 |
| JPS6111397B2 true JPS6111397B2 (en) | 1986-04-02 |
Family
ID=15335735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14330879A Granted JPS5667796A (en) | 1979-11-07 | 1979-11-07 | Failed fuel eetector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5667796A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0682999U (en) * | 1993-01-07 | 1994-11-29 | 良默 林 | Roll |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1434611B1 (en) | 2001-10-12 | 2006-06-07 | Coloplast A/S | Sealing device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5423894A (en) * | 1977-07-25 | 1979-02-22 | Toshiba Corp | Detector for nuclear fission product gas |
-
1979
- 1979-11-07 JP JP14330879A patent/JPS5667796A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0682999U (en) * | 1993-01-07 | 1994-11-29 | 良默 林 | Roll |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5667796A (en) | 1981-06-08 |
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