JPS5927290A - Reactor shutdown device - Google Patents
Reactor shutdown deviceInfo
- Publication number
- JPS5927290A JPS5927290A JP57136327A JP13632782A JPS5927290A JP S5927290 A JPS5927290 A JP S5927290A JP 57136327 A JP57136327 A JP 57136327A JP 13632782 A JP13632782 A JP 13632782A JP S5927290 A JPS5927290 A JP S5927290A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- guide tube
- reactor
- coolant
- temperature switch
- 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.)
- Pending
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
- Paper (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Steering Control In Accordance With Driving Conditions (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は高速増殖炉等において冷却材温度の異常上昇時
に動作して炉の運転を停止させる原子炉停止装置に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a nuclear reactor shutdown device that operates in a fast breeder reactor or the like to stop the operation of the reactor when the coolant temperature rises abnormally.
一般に高速増殖炉は、中性子吸収材を内蔵した制御棒を
炉心に挿脱して出方制御を行なうようになっていて、事
故時等の緊急時にはこの制御棒を炉心に全挿入して炉の
出方を停止させるようになっている。しかしてこのよう
な緊急時:、には炉の運転を確実に停止させる必要があ
るため、構造が簡単で確実に作動し得る原子炉停止装置
を必要とする。したがってこの種装置は、原子炉異常時
に出方されるスクラム信号にもとづいて制御棒駆動機構
等の外部機器を用いて作動する原子炉停止糸と、このよ
うな外部機器を用いることなく独立して動作する単独落
下式原子炉停止系とを並用して2束・3重の安全対策を
講じることが望まれている。、
そこで、次に述べるような従来の原子炉停止装置が開発
された。すなわち、前記制御棒は延長管の下部に吊下さ
れて炉心内に挿脱操作されるものであるが、制御棒と延
長管との間に設けられた電磁石への通電を温度スイッチ
で開成し制御棒を炉心内に落下させるものである。In general, fast breeder reactors are designed to control the exit of the reactor by inserting and removing a control rod containing a neutron absorber into the reactor core, and in the event of an emergency such as an accident, the control rod is fully inserted into the core and the reactor exits. It is designed to stop the driver. However, in such an emergency situation, it is necessary to reliably stop the operation of the reactor, so a reactor shutdown device that has a simple structure and can operate reliably is required. Therefore, this type of device has a reactor shutdown thread that operates using external equipment such as a control rod drive mechanism based on a scram signal issued during a reactor abnormality, and a reactor shutdown thread that operates independently without using such external equipment. It is desired to take double-bundle and triple-layer safety measures by using the single-drop type nuclear reactor shutdown system that operates at the same time. Therefore, the conventional reactor shutdown equipment described below was developed. That is, the control rods are suspended from the bottom of the extension tube and inserted into and removed from the reactor core, but the electromagnets installed between the control rods and the extension tube are energized by a temperature switch. The control rods are dropped into the reactor core.
ところが、前記温度スイッチは延長管の下部に取付けら
れておシ、冷却材の異常温度上昇を検出するのに比較的
長い時間を要し、冷却材の異常温度上昇に対する対策が
遅延する不具合があった。However, since the temperature switch is installed at the bottom of the extension pipe, it takes a relatively long time to detect an abnormal temperature rise in the coolant, which causes a delay in taking measures against the abnormal temperature rise in the coolant. Ta.
本発明の目的は、構造が簡単で確実に動作し駆hJ機構
%を用いた他の原子炉停止系とは独立して単独に作動す
ることができるとともに、冷却材の異常温度上昇を早期
に検出することができ、しかもイぎ転性の畠い原子炉停
止装置を提供することにある。The purpose of the present invention is to have a simple structure, to operate reliably, to be able to operate independently from other reactor shutdown systems using the hJ mechanism, and to prevent abnormal temperature rises in the coolant at an early stage. It is an object of the present invention to provide a nuclear reactor shutdown device that is capable of detecting and is capable of inverting.
本発明による原子炉停止装置は、炉心に立設され内部に
冷却利が流通する1部案内管と、この下部案内管の上方
に位置し炉外に設けられた駆動部によって昇降駆動され
る延長管と、この延長管に取着され磁力によって前記制
御棒を吸着保持する電磁石と、前記延長管を囲み前記下
部案内管の上部開口の直上で開口した上部案内管と、こ
の上部案内管の下部開口外周面に取付けられ冷却材の異
常温度上昇時に開成して前記電磁石への通電を断つ温度
スイッチと、この温度スイッチを囲み上下端が開口し前
記上部案内管の周囲に設りられたU流管とを具備したも
のである。したがって、冷却材の異常温度上昇を早期に
検出して迅速に対策を講じることがてきるものである。The nuclear reactor shutdown device according to the present invention includes a partial guide pipe that is installed upright in the reactor core and through which cooling power flows inside, and an extension that is located above the lower guide pipe and is driven up and down by a drive unit that is provided outside the reactor. a tube, an electromagnet attached to the extension tube to attract and hold the control rod by magnetic force, an upper guide tube that surrounds the extension tube and opens directly above the upper opening of the lower guide tube, and a lower part of the upper guide tube. A temperature switch is attached to the outer circumferential surface of the opening and opens when the temperature of the coolant rises abnormally to cut off the power to the electromagnet. It is equipped with a tube. Therefore, abnormal temperature rise of the coolant can be detected early and countermeasures can be taken quickly.
第1図ないし第2図を参照して本発明の一実施例を説明
する。An embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG.
図中1は液体金属冷却形為速増殖炉の原子炉容器、2は
炉心、3は遮蔽プラグ、4は炉心上部機構であって、こ
の炉心上部機構4には制御棒駆動機構5が設けられてい
る。6は上記制御棒駆動す構5を構成する上部案内管で
あり、この上部案内管6には延長管7が昇降自在に挿通
され、この延長管7は炉外に設けられた駆動部8によっ
て昇降駆動されるようになっている。In the figure, 1 is a reactor vessel of a liquid metal cooled rapid breeder reactor, 2 is a reactor core, 3 is a shielding plug, and 4 is a core upper mechanism, and this core upper mechanism 4 is provided with a control rod drive mechanism 5. ing. Reference numeral 6 denotes an upper guide tube constituting the control rod drive mechanism 5. An extension tube 7 is inserted into the upper guide tube 6 so as to be able to rise and fall freely. It is designed to be driven up and down.
一方、炉心2には多数のラッパ管9と案内管10とが所
定の配置で鉛直に装荷されている。On the other hand, a large number of trumpet tubes 9 and guide tubes 10 are vertically loaded in the core 2 in a predetermined arrangement.
これらう、/4′管9と案内管10は、高圧ゾレナム1
1を構成する上下の炉心支持板12.22によって支持
されておシ、各ラッノ4管9および案内管10内には、
上記高圧プレナム11内を流れる冷却材たとえば液体ナ
トリウムが流入して、各管内を下方から上方に向って流
通するようになっている。そして上記ラッノ4管9には
炉心燃料13が内蔵され、また案内管10には制御棒1
4が昇降自在に挿入されている。この制御棒14は中性
子吸収材15を内蔵しているとともに、その上端部に磁
性体16を有している。These pipes, the /4' pipe 9 and the guide pipe 10 are connected to the high pressure solenum 1
1, supported by upper and lower core support plates 12, 22 constituting 1, and inside each Rano 4 tube 9 and guide tube 10,
A coolant, such as liquid sodium, flowing through the high-pressure plenum 11 flows into each tube from the bottom to the top. The core fuel 13 is built into the Rano 4 tube 9, and the control rod 1 is contained in the guide tube 10.
4 is inserted so that it can be moved up and down. This control rod 14 contains a neutron absorbing material 15 and has a magnetic material 16 at its upper end.
そして前記延長管7の下端には上記磁性体16を吸着す
るvL磁石17が取着されている。A vL magnet 17 that attracts the magnetic body 16 is attached to the lower end of the extension tube 7.
18はこの電磁石に給電するケーブルであって、このケ
ーブル18の途中には電磁石17に対する通断電をなす
温度スイッチ19が設けられている0この温度スイッチ
19は、冷却材が正常な温度のときには接点を閉じてい
るが、冷却材温度が通電の原子炉出力運転時よりも高温
となった異常温度上昇時に、その熱を受けて変形するこ
とによシ開成し、電磁石17に対する通電を断つように
なっでいる。18 is a cable that supplies power to this electromagnet, and a temperature switch 19 is provided in the middle of this cable 18 to turn on/off electricity to the electromagnet 17. This temperature switch 19 is turned on when the coolant is at a normal temperature. The contact is closed, but when the coolant temperature rises abnormally to a higher temperature than during energized reactor output operation, it deforms due to the heat and opens, cutting off the energization to the electromagnet 17. It is becoming.
前記温度スイッチ19は上部案内管6の下部開口外周面
に取付りられている。そして、温度スイッチ19を囲む
ように整流管20が前記上S案内管6の外周面に沿って
設けられている。The temperature switch 19 is attached to the outer peripheral surface of the lower opening of the upper guide tube 6. A rectifier tube 20 is provided along the outer peripheral surface of the upper S guide tube 6 so as to surround the temperature switch 19.
整流管20の上下端部は開口しており、前記炉心2から
流出する冷却劇を前記温度スイッチ19の周囲に案内す
るように構成されている。The upper and lower ends of the rectifier tube 20 are open, and are configured to guide the cooling fluid flowing out from the reactor core 2 around the temperature switch 19.
以上のように構成された一実施例装置は、冷却側温度が
正常なときには温度スイッチ19が閉成しているから、
ケーブル18に通電して電磁石12を常時励磁状態にし
ておくOそしてその磁力によシ制御棒14の上端部すな
わち磁性体16を吸着し、制御棒14を吊持させた状態
で駆動部8により延長管7を引き上け、制御棒14を炉
心領域から退避させるOこうすることによって炉の出力
運転が可能となり、冷却材は炉心2にて加熱されて高温
となり、炉容器1外に導出されて図示しない中間熱交換
器に導かれ、熱交換を行なって再び炉容器1に導入され
る。In one embodiment of the apparatus configured as described above, the temperature switch 19 is closed when the cooling side temperature is normal.
The cable 18 is energized to keep the electromagnet 12 in an energized state at all times.The upper end of the control rod 14, that is, the magnetic body 16, is attracted by the magnetic force, and the control rod 14 is suspended by the drive unit 8. The extension tube 7 is pulled up and the control rods 14 are evacuated from the reactor core region. By doing this, the reactor can be operated at its output, and the coolant is heated in the reactor core 2 to a high temperature and is led out of the reactor vessel 1. The fuel is then guided to an intermediate heat exchanger (not shown), undergoes heat exchange, and is then introduced into the furnace vessel 1 again.
そして冷却材の一部は上部案内管6を加熱し、温度スイ
ッチ19も加熱されるが、冷却材温度が正常のときには
、温度スイッチ19は閉成し7たままとなるため、電磁
石17は励磁状態が維持される。したがって制御棒14
はその上限位置に保持され、炉の出力運転が継続される
。A part of the coolant heats the upper guide tube 6 and the temperature switch 19 is also heated, but when the coolant temperature is normal, the temperature switch 19 remains closed, so the electromagnet 17 is excited. The state is maintained. Therefore, the control rod 14
is held at its upper limit position, and the furnace continues to operate at power.
しかして、冷却材の流量が低下するなど何らかの事故が
発生して冷却材温度が異常に上昇した場合には、整流管
20に案内された高温の冷却材が温度スイッチ19の周
囲を流通する。したがって、温度スイッチ19は冷却材
によって加熱され早期に冷却材の異常温度上昇を検出す
ることになる。このため、温度スイッチ19は開成し、
電磁石17は解磁され制御棒14は案内管10内を自重
によシ落下し炉心内に全挿入される。したがって、炉の
出力は低下し、やがて炉の運転は停止する。なお、この
ような原子炉異常時には他の安全系装置によってスクラ
ム信号が出力され、駆動部8が作動して制御棒14の強
制落下も行なわれる。If some kind of accident occurs such as a decrease in the flow rate of the coolant and the temperature of the coolant rises abnormally, the high temperature coolant guided through the rectifier tube 20 flows around the temperature switch 19. Therefore, the temperature switch 19 is heated by the coolant and detects an abnormal temperature rise of the coolant at an early stage. Therefore, the temperature switch 19 is opened,
The electromagnet 17 is demagnetized, and the control rod 14 falls under its own weight inside the guide tube 10 and is fully inserted into the reactor core. Therefore, the output of the furnace decreases and eventually the furnace stops operating. Incidentally, when such a reactor abnormality occurs, a scram signal is outputted by other safety system devices, and the drive section 8 is operated to forcefully drop the control rod 14.
このように本実施例によれば、冷却材温度の異常上昇時
に自動的に制御棒14を落下させることができ、この落
下動作は原子炉異常時に出されるスクラム信号等の電気
信号とは無関係に単独で行なわれるから、他の原子炉停
止系、たとえはスクラム信号にもとづいて駆動部8を動
作させ、制御棒14を強制落下させるようにした原子炉
停止系などが万一正常に作動しない場合であっても、制
御棒14を確実に炉心領域に落下させることができ安全
である。しかも本実施例の原子炉停止系は温度スイッチ
19と電磁石17とで構成されるものであって、これら
は構造がm1単で確実に作動し得る利点がある。したが
って、他の原子炉停止系のバックアップとしてきわめて
有効で6D、原子炉の安全性を格段に向上させることが
できる。In this way, according to this embodiment, the control rod 14 can be automatically dropped when the coolant temperature rises abnormally, and this dropping operation is independent of the electrical signal such as the scram signal that is issued when the reactor is abnormal. Since this is carried out independently, in the unlikely event that other reactor shutdown systems, such as a reactor shutdown system that operates the drive unit 8 based on the scram signal and forcibly drops the control rod 14, do not operate normally. Even in this case, the control rods 14 can be reliably dropped into the core region and are safe. Furthermore, the reactor shutdown system of this embodiment is composed of a temperature switch 19 and an electromagnet 17, which have the advantage of being able to operate reliably with a simple structure of m1. Therefore, it is extremely effective as a backup for other reactor shutdown systems, and the safety of the reactor can be significantly improved.
さらに、本実施例によれば、温度スイッチ19を上部案
内管6の下部開口外周面に増刊けて、温度スイッチ19
が下部案内管10の上部開口10aの・直上に位置する
ようにしたから、う、ツク管9甑、案内管10の出口部
から流出する冷却材の温度を、従来と比較してよシ短時
間で検出して異常温度上昇をさらに早期に検知できる。Furthermore, according to this embodiment, the temperature switch 19 is additionally provided on the outer peripheral surface of the lower opening of the upper guide tube 6, and the temperature switch 19
Since it is located directly above the upper opening 10a of the lower guide tube 10, the temperature of the coolant flowing out from the outlet of the guide tube 9 and the guide tube 10 can be reduced compared to the conventional method. Abnormal temperature rise can be detected even earlier by detecting the time.
しかも、前記温度スイッチ19は整流管20で囲まれて
いるので冷却材は整流管20に案内されて温度スイッチ
19の周囲を流通するのでさらに一層短時間で異常温度
上昇を検出できる◇
なおこの発明は、駆動部によって制御棒の上下位置を任
意に調節して出力調整を行なうようにしたいわゆる出力
調整棒に適用できるのは勿論のこと、このような出力調
整機能を持たずに単に原子炉停止機能のみを持たせるよ
うにした安全棒としても同様に適用可能である。Moreover, since the temperature switch 19 is surrounded by the rectifier tube 20, the coolant is guided by the rectifier tube 20 and flows around the temperature switch 19, so that an abnormal temperature rise can be detected in an even shorter time◇This invention Of course, this can be applied to so-called output adjustment rods that adjust the output by arbitrarily adjusting the vertical position of the control rod using the drive unit, but it can also be used to simply shut down the reactor without such an output adjustment function. It can also be similarly applied as a safety rod that only has a function.
本発明によれば、延長管下部に制御棒を磁力によって吸
着・保持する電磁石を設けるとともに、冷却材の異常温
度上昇時に開成して電磁石への通電を断つ温度スイッチ
を上部案内管の下部開口外周面に設け、前記温度スイッ
チの周囲に冷却材を案内する整流管を設け、冷却劇の異
常高温時に制御棒を自動的に落下させるようにしたから
、駆動機構等を用いた他の原子炉停止系とは独立した単
独落下式の原子炉停止系として作動でき、多重の安全装
置として高い信頼性を得ることができるとともに早期に
冷却材の異常温度上昇を検知することができる等その効
果は犬である。According to the present invention, an electromagnet that attracts and holds the control rod by magnetic force is provided at the lower part of the extension tube, and a temperature switch is installed around the lower opening of the upper guide tube to open and cut off power to the electromagnet when the coolant temperature rises abnormally. A rectifier tube is installed around the temperature switch to guide the coolant, and the control rod is automatically dropped in the event of an abnormally high temperature during a cooling operation. It can operate as a standalone drop-type reactor shutdown system independent of the rest of the reactor system, and is highly reliable as a multi-layered safety device, as well as being able to detect abnormal temperature rises in the coolant at an early stage. It is.
図面はこの発明の一実施例を示し、第1図は高速増畑炉
の縦断面図、第2図は炉心の一部と制御棒駆動機構の下
部を示す縦断面図である。
2・・・炉心、2・・・延長管、8・・・駆動部、10
・・・案内管、10IL・・・上部開口、14・・・制
御棒、17・・・電磁石、19・・・温度スイッチ、2
0・・・整流管。The drawings show an embodiment of the present invention, with FIG. 1 being a longitudinal cross-sectional view of a high-speed field expansion reactor, and FIG. 2 being a longitudinal cross-sectional view showing a part of the reactor core and the lower part of the control rod drive mechanism. 2... Core, 2... Extension tube, 8... Drive section, 10
...Guide tube, 10IL...Top opening, 14...Control rod, 17...Electromagnet, 19...Temperature switch, 2
0... Rectifier tube.
Claims (1)
この下部案内管の上方に位置し炉外に設けられた駆動部
によって昇降駆動される延長管と、この延長管に取着さ
れ磁力によって前記制御棒を吸着・保持する電磁石と、
前記延長管を囲み前記下部案内管の上部開口の直上で開
口した上部案内管と、この上部案内管の下部開口外周面
に取付けられ冷却材の異常温度上昇時に開成して前記電
磁石への通電を断つ温度スイッチと、この温度スイッチ
を囲み上下端が開口し前記上部案内管の周囲に設けられ
た整流管とを具備したことを特徴とする原子炉停止装置
。a lower guide pipe installed in the reactor core and through which coolant flows;
an extension tube located above the lower guide tube and driven up and down by a drive unit provided outside the furnace; an electromagnet attached to the extension tube that attracts and holds the control rod by magnetic force;
An upper guide tube that surrounds the extension tube and opens directly above the upper opening of the lower guide tube; and an upper guide tube that is attached to the outer peripheral surface of the lower opening of the upper guide tube and opens when the coolant temperature rises abnormally to energize the electromagnet. 1. A nuclear reactor shutdown device comprising: a temperature switch for disconnecting; and a rectifier tube surrounding the temperature switch, having open upper and lower ends, and provided around the upper guide tube.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57136327A JPS5927290A (en) | 1982-08-06 | 1982-08-06 | Reactor shutdown device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57136327A JPS5927290A (en) | 1982-08-06 | 1982-08-06 | Reactor shutdown device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5927290A true JPS5927290A (en) | 1984-02-13 |
Family
ID=15172627
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP57136327A Pending JPS5927290A (en) | 1982-08-06 | 1982-08-06 | Reactor shutdown device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5927290A (en) |
-
1982
- 1982-08-06 JP JP57136327A patent/JPS5927290A/en active Pending
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