JPS6025752B2 - Reactor shutdown device - Google Patents

Reactor shutdown device

Info

Publication number
JPS6025752B2
JPS6025752B2 JP54155396A JP15539679A JPS6025752B2 JP S6025752 B2 JPS6025752 B2 JP S6025752B2 JP 54155396 A JP54155396 A JP 54155396A JP 15539679 A JP15539679 A JP 15539679A JP S6025752 B2 JPS6025752 B2 JP S6025752B2
Authority
JP
Japan
Prior art keywords
neutron
neutron absorber
guide tube
holding
shutdown device
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
Application number
JP54155396A
Other languages
Japanese (ja)
Other versions
JPS5679286A (en
Inventor
義彦 奈良
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Nippon Genshiryoku Jigyo KK
Original Assignee
Toshiba Corp
Nippon Genshiryoku Jigyo KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Nippon Genshiryoku Jigyo KK filed Critical Toshiba Corp
Priority to JP54155396A priority Critical patent/JPS6025752B2/en
Publication of JPS5679286A publication Critical patent/JPS5679286A/en
Publication of JPS6025752B2 publication Critical patent/JPS6025752B2/en
Expired legal-status Critical Current

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

  • Structure Of Emergency Protection For Nuclear Reactors (AREA)

Description

【発明の詳細な説明】 本発明は高速炉等の原子炉を停止させる装置に関する。[Detailed description of the invention] The present invention relates to an apparatus for shutting down a nuclear reactor such as a fast reactor.

一般に高速増殖炉等では炉停止の信頼性を増すため、出
力制御用の制御棒とは別に非常時等に炉心に挿入される
中性子吸収体を備えている。そして、従来これらの炉停
止装置としては外部からの機械的あるいは流体的な操作
力によって中性子吸収体を炉心に挿入するものがあるが
、このようなものは外部からの操作力に依存するため、
非常時等における信頼性に劣る不具合があった。また炉
心を流れる冷却材の過度の温度上昇に応勢して自動的に
中性子吸収体を炉心内に挿入し、外部からの操作力に依
存しないものもある。しかし、このようなものは反応度
挿入形事故等における作動の過程は中性子東の増加、燃
料の発熱量の増加、冷却材の温度上昇と云う過程を経て
作動することになり、応答性が悪く、高い応答性を要求
される高速炉の停止装置としては必らずしも満足すべき
ものではなかった。本発明は以上の事情にもとずし、て
なされたもので、その目的とするところは外部からの操
作力や信号等に依存せず、かつ応答性の高い原子炉停止
装置を得ることにある。In general, fast breeder reactors and the like are equipped with neutron absorbers that are inserted into the reactor core in emergencies, in addition to control rods for output control, in order to increase the reliability of reactor shutdown. Conventionally, these reactor shutdown devices insert neutron absorbers into the reactor core using mechanical or fluid operating force from the outside, but since such devices rely on external operating force,
There was a problem with poor reliability during emergencies. There are also systems that automatically insert neutron absorbers into the core in response to excessive temperature rises in the coolant flowing through the core, and do not rely on external operating force. However, in the event of a reactivity insertion type accident, such a device operates through the process of increasing neutron energy, increasing the calorific value of the fuel, and increasing the temperature of the coolant, resulting in poor responsiveness. However, this was not necessarily satisfactory as a fast reactor shutdown device that required high responsiveness. The present invention was made based on the above circumstances, and its purpose is to provide a nuclear reactor shutdown system that does not depend on external operating force or signals and has high responsiveness. be.

以下本発明を図面に示す実施例にしたがって説明する。The present invention will be explained below according to embodiments shown in the drawings.

第１図ないし第３図は本発明の第１実施例を示す。図中
１は外筒、２は案内管であり、これら外管１と案内管２
は炉心３に鉛直方向に挿入され、それらの下端部は炉心
支持板４，５によって支持されている。そして、この外
筒１と案内管２の間には複数の制御棒６・・・が環状に
配列されている。そしてこれら制御棒６…はハンドリン
グヘッド７に連結され、このハンドリングヘッド７を介
して制御榛駆動機構（図示せず）によって昇降されるよ
うに構成されている。また、下方の炉心支持板５には接
続部村８が設けられ、案内管２の下端部はこの接続部材
８内に鼓合している。そしてこの接続部材８はへッダ（
図示せず）等に接続され、この接続部材８を介して案内
管２内に液体ナトリウム等の冷却材が供Ｖ給されるよう
に構成されている。そして、上記案内管２の上部には中
性子吸収体収容ケース９が設けられ、この中性子吸収体
収容ケース９は案内管２内を落下して炉心３に挿入され
るように構成されている。そして、この中性子吸収体収
容ケース９内には中性子吸収体９ａ…が収容されている
。そして、この中性子吸収体収容ケース９の下部には保
持解放機構１０が設けられ、この保持解放機構１０は中
性子吸収体収容ケース９を案内管２の上部に保持し、ま
た非常時等にはこの保持を解放して中性子吸収体収容ケ
ース９を落下させるものである。次にこの保持解放機構
１０の構成について説明する。図中１１，１１は爪部材
であって、これら爪部材１１，１１はそれぞれ中間部を
軸１２，１２によって中性子吸収体収容ケース９に互に
対向して回動自在に枢着されている。そして、これら爪
部材１１，１１の下端部は中性子吸収体収容ケ−ス９の
周壁部に形成された透孔１３，１３から外方に突出し、
案内管２の内面に突設されたストツパ１４，１４に係合
してこの中性子吸収体収容ケース９を保持している。そ
して、これら爪部材１１，１１の上端部間には中性子応
動体１５が取付けられている。この中性子応動体１５は
核分裂物質をたとえば合金として含んだ材料で形成され
ている。そしてこの中性子応動体１５は炉Ｄ３からの中
性子によって核分烈反応を起し、発熱するように構成さ
れている。そして、通常の出力の場合にはこの中性子応
動体１５は案内管２内を流れる冷却材によって冷却され
一定の範囲の温度に維持されている。そして、この状態
では爪部材１１，１１がストッパ１４，１４に係合して
中性子吸収体収容ケース９を保持するように各部の寸法
が設定されている。また、反応度挿入事故等炉心３の出
力が過度に上昇した場合には炉心３からの中性子東の増
加によりこの中性子応動体１５の発熱量が増大して温度
が上昇し、、熱晒彰張あるいは材料の相変化によって膨
張してその長さが伸長するように構成されている。そし
て、この状態では爪部材１ １，１１の上端部が互に離
反する方向に押されて爪部材１１，１１が回動し、これ
ら爪部材１１，１１の下端部が没入してストッパ１４，
１４との係合が外れるように各部の寸法が設定されてい
る。以上の如く構成された本発明の第１実施例は、炉心
３の出力が正常の範囲内である場合には中性子応動体１
５の温度が所定の範囲に維持され、この中性予応動体１
５は所定の寸法であり、爪部材１１，１１はストッパー
４，１４に係合して中性子吸収体収容ケース９は案内管
２の上端部に保持されている。なお、この正常運転時に
は案内管２の周囲に環状に配置された制御棒６・・・を
制御棒駆動機構（図示せず）によって駆動し、炉心３の
出力の制御をおこなう。そして、反応度挿入事故等が生
じて炉心３の出力が過度に上昇した場合には、炉心３か
らの中性子東が増加し、中性子応動体１５内での反応度
が増加して発熱量が増し、その温度が所定の範囲以上に
上昇する。したがってこの中性子応動体１５は伸長し、
爪部村１１，１１が回動してストッパ１４，１４との係
合が外れ、中性子吸収体収容ケース９の保持が解放され
てこの中性子吸収体収容ケース９は案内管２内を落下し
、炉Ｄ３に挿入され、炉を停止する。そして、この第１
実施例のものは核分裂物質を含む中性子応動体１５の温
度上昇による伸長によって中性子吸収体９ａ・・・を内
蔵した中性子吸収体収容ケース９の保持を解放して落下
させ、炉心３に挿入するものであるから、外部からの操
作力、信号等に依存することがなく、信頼性が大である
とともに中性子東の増加に直接的に対応して中性子応動
体１５が伸長するので応答性にすぐれる。また、案内管
２は通常時の出力制御をなす環状に配置された制御棒６
・・・の内側に設けたので、全体の構成が簡単で小形化
し、炉心３の構造が簡略化される。なお、本発明は上記
の第１実施例には限定されない。1 to 3 show a first embodiment of the invention. In the figure, 1 is an outer tube, 2 is a guide tube, and these outer tube 1 and guide tube 2 are
are vertically inserted into the core 3, and their lower ends are supported by core support plates 4 and 5. A plurality of control rods 6 are arranged in an annular manner between the outer cylinder 1 and the guide tube 2. These control rods 6 are connected to a handling head 7, and are configured to be raised and lowered via the handling head 7 by a control rod drive mechanism (not shown). Further, a connecting portion 8 is provided on the lower core support plate 5, and the lower end portion of the guide tube 2 fits within this connecting member 8. This connecting member 8 is a header (
(not shown), etc., and is configured so that a coolant such as liquid sodium is supplied into the guide tube 2 via this connecting member 8. A neutron absorber housing case 9 is provided above the guide tube 2, and the neutron absorber housing case 9 is configured to fall within the guide tube 2 and be inserted into the reactor core 3. In this neutron absorber housing case 9, neutron absorbers 9a are housed. A holding and releasing mechanism 10 is provided at the lower part of the neutron absorber housing case 9, and this holding and releasing mechanism 10 holds the neutron absorber housing case 9 at the upper part of the guide tube 2, and in an emergency, etc. The holding is released and the neutron absorber housing case 9 is allowed to fall. Next, the configuration of this holding and releasing mechanism 10 will be explained. In the figure, reference numerals 11 and 11 indicate claw members, and these claw members 11 and 11 are rotatably connected to the neutron absorber storage case 9 by shafts 12 and 12 at their intermediate portions, respectively, so as to face each other. The lower end portions of these claw members 11, 11 protrude outward from through holes 13, 13 formed in the peripheral wall portion of the neutron absorber storage case 9.
The neutron absorber housing case 9 is held by engaging with stoppers 14, 14 protruding from the inner surface of the guide tube 2. A neutron responsive body 15 is attached between the upper ends of these claw members 11, 11. The neutron response body 15 is made of a material containing fissile material, for example, as an alloy. The neutron reactor 15 is configured to cause a nuclear fission reaction with neutrons from the reactor D3 and generate heat. In the case of normal output, the neutron reactor 15 is cooled by the coolant flowing within the guide tube 2 and maintained at a temperature within a certain range. In this state, the dimensions of each part are set so that the claw members 11, 11 engage with the stoppers 14, 14 to hold the neutron absorber storage case 9. In addition, when the output of the reactor core 3 increases excessively due to a reactivity insertion accident, the calorific value of the neutron response body 15 increases due to the increase in neutrons from the reactor core 3, and the temperature rises. Alternatively, it is configured to expand and extend its length due to a phase change of the material. In this state, the upper ends of the claw members 11, 11 are pushed in the direction away from each other, causing the claw members 11, 11 to rotate, and the lower ends of these claw members 11, 11 are retracted, causing the stopper 14,
The dimensions of each part are set so that the engagement with 14 is released. In the first embodiment of the present invention configured as described above, when the output of the reactor core 3 is within the normal range, the neutron reactor 1
5 is maintained within a predetermined range, and this neutral pre-reaction body 1
Reference numeral 5 indicates a predetermined dimension, and the claw members 11, 11 engage with the stoppers 4, 14, so that the neutron absorber housing case 9 is held at the upper end of the guide tube 2. Note that during normal operation, the control rods 6 arranged annularly around the guide tube 2 are driven by a control rod drive mechanism (not shown) to control the output of the reactor core 3. If a reactivity insertion accident or the like occurs and the output of the core 3 increases excessively, the number of neutrons from the core 3 increases, the reactivity within the neutron response body 15 increases, and the amount of heat generated increases. , the temperature rises above a predetermined range. Therefore, this neutron responsive body 15 extends,
The claw sections 11, 11 rotate and disengage from the stoppers 14, 14, and the holding of the neutron absorber housing case 9 is released, and the neutron absorber housing case 9 falls within the guide tube 2. It is inserted into the furnace D3 and the furnace is stopped. And this first
In the embodiment, the neutron absorber housing case 9 containing the neutron absorbers 9a is released and dropped by elongation due to temperature rise of the neutron response body 15 containing fissile material, and is inserted into the reactor core 3. Therefore, it does not depend on external operating force, signals, etc., and has high reliability, and also has excellent responsiveness because the neutron response body 15 extends directly in response to an increase in neutron east. . The guide tube 2 also includes a control rod 6 arranged in an annular shape that controls the output during normal operation.
..., the overall configuration is simple and compact, and the structure of the core 3 is simplified. Note that the present invention is not limited to the first embodiment described above.

たとえば第４図には本発明の第２実施例を示す。For example, FIG. 4 shows a second embodiment of the present invention.

この第２実施例は中性子吸収体収容ケース９の底部から
中性子応動体１５′を立設し、その上端部にテーパ状の
穣都材１６を取付けたもので、中性子応動体１５′が伸
長することによりこの襖部材１６が爪部材１１，１１の
上端部間に進入してこれら爪部材１１，１１を回動させ
、ストッパ１４，１４との係合を解除して中性子吸収体
収容ケース９を落下させるものである。また、第５図に
は本発明の第３実施例を示す。In this second embodiment, a neutron response body 15' is set upright from the bottom of the neutron absorber storage case 9, and a tapered core material 16 is attached to the upper end of the neutron response body 15', so that the neutron response body 15' is extended. As a result, the sliding door member 16 enters between the upper ends of the claw members 11, 11, rotates the claw members 11, 11, releases the engagement with the stoppers 14, 14, and opens the neutron absorber storage case 9. It is something that causes it to fall. Further, FIG. 5 shows a third embodiment of the present invention.

この第３実施例は中性子吸収体収容ケース９の外周面に
ストツパ１７，１７を突設し、また案内管２の内面に斜
上方に向けてばね板１８，１８を突設し、これらばね板
１８，１８の先端部に係止部材１９，１９を取付け、こ
れら係止部材１９，１９をストツパ１７，１７に係合さ
せて中性子吸収体収容ケース９を保持するように構成さ
れている。また、上記ばね板１８，１８の下方にはたと
えば筒状をなす中性子応動体２０を突設し、この中性子
応動体２０が伸長することによりばね板１８，１８を押
してこれらを互に離反する方向に変形させ、係止部材１
９，１９とストッパ１７，１７との係合を外して中性子
吸収体収容ケース９を落下させるものである。なお、上
記第２および第３実施例は上述の点以外は前記第１実施
例と同機の構成で、第４図ないし第５図中第１実施例と
対応する部分には同符号を附してその説明を省略する。
また、第６図には本発明の第４実施例を示す。In this third embodiment, stoppers 17, 17 are provided protruding from the outer peripheral surface of the neutron absorber storage case 9, and spring plates 18, 18 are provided protruding obliquely upward from the inner surface of the guide tube 2. Locking members 19, 19 are attached to the tips of the neutron absorber housing case 9, and the locking members 19, 19 are engaged with the stoppers 17, 17 to hold the neutron absorber housing case 9. Further, below the spring plates 18, 18, for example, a cylindrical neutron response body 20 is protruded, and when the neutron response body 20 extends, it pushes the spring plates 18, 18 in a direction that separates them from each other. and locking member 1
The neutron absorber storage case 9 is dropped by disengaging the stoppers 17 and 9, 19 from each other. The second and third embodiments have the same structure as the first embodiment except for the points mentioned above, and the same reference numerals are given to the parts in FIGS. 4 and 5 that correspond to those of the first embodiment. Therefore, the explanation will be omitted.
Further, FIG. 6 shows a fourth embodiment of the present invention.

この第４実施例は中性子吸収体２１・・・を流動し得る
粒状たとえば球状に形成してこれらの多数個を案内管２
の上部に収容したものである。そして、この案内管２の
上部にはこれを仕切る隔壁２２が設けられ、この隔壁２
２の中央部には落下口２３が形成されている。そして、
この落下口２３には下方から円板形の蓋状をなす中性子
応動体２４が取付けられ、この中性子応動体２４の周縁
部には鋼状をなす係着部材２５・・・が放射状に突設さ
れ、これら係着部材２５・・・は落下口２３の周縁部に
形成された係止部２６に係合している。そして上記の中
性子応動体２４が熱膨張して経が増大すると係着部材２
５・・・と係止部２６との係合が外れ、この蓋状の中性
子応動体２４が落下口２３から外れ、中性子吸収体２１
・・・が落下口２３より落下するように構成したもので
ある。また、第７図には本発明の第５実施例を示す。In this fourth embodiment, the neutron absorbers 21 are formed into fluid particles, such as spheres, and a large number of them are arranged in a guide tube 2.
It is housed in the upper part of the . A partition wall 22 is provided at the upper part of this guide tube 2 to partition it, and this partition wall 2
A drop port 23 is formed in the center of the container 2. and,
A neutron response body 24 in the form of a disc-shaped lid is attached to the drop port 23 from below, and steel-shaped engagement members 25 are provided radially protruding from the periphery of the neutron response body 24. The locking members 25 are engaged with locking portions 26 formed on the peripheral edge of the drop port 23. When the neutron responsive body 24 thermally expands and its diameter increases, the engaging member 2
5... is disengaged from the locking part 26, and the lid-shaped neutron response body 24 comes off from the drop opening 23, and the neutron absorber 21
. . . is configured to fall from the drop opening 23. Further, FIG. 7 shows a fifth embodiment of the present invention.

この第５実施例は隔壁２７の落下口２８に栓体状の中性
子応動体２９を取付けてこの落下口２８を閉塞したもの
である。そしてこの栓体状の中性子応動体２９は比較的
融点が低く、発熱によって溶融するように構成したもの
で、この溶融によって球状の中性子吸収体２１…が落下
口２８より落下するように構成したものである。また、
第８図には本発明の第６実施例を示す。In this fifth embodiment, a plug-shaped neutron response body 29 is attached to a drop port 28 of a partition wall 27 to close the drop port 28. The plug-shaped neutron response body 29 has a relatively low melting point and is configured to melt due to heat generation, and the spherical neutron absorber 21 is configured to fall from the drop port 28 by this melting. It is. Also,
FIG. 8 shows a sixth embodiment of the present invention.

この第６実施例は案内管２の上部を仕切る隔壁３０の流
下口３１に発熱によって溶融する千全体状の中性子応動
体３２を取付けてこの流下口３１を閉塞し、この案内管
２の上部に液体状の中性子吸収体３３を貯溜したもので
ある。そして、上記の中性子応動体３２が発熱によって
溶融することにより液状の中性子吸収体３３が流下口３
１より流下するものである。なお、上記第第５実施例お
よび第６実施例は前記第４実施例と同様の構成である。
また、第９図には本発明の第７実施例を示す。In this sixth embodiment, a neutron-responsive body 32 in the shape of a millimeter, which melts due to heat generation, is attached to the flow-through port 31 of a partition wall 30 that partitions the upper part of the guide tube 2, and this flow-through flow port 31 is closed. A liquid neutron absorber 33 is stored therein. When the neutron responsive body 32 is melted by heat generation, the liquid neutron absorbing body 33 is released into the flow port 3.
It flows downstream from 1. Note that the fifth and sixth embodiments have the same configuration as the fourth embodiment.
Further, FIG. 9 shows a seventh embodiment of the present invention.

この第７実施例は中性子吸収体１０・・・を収容した中
性子吸収体収容ケース９の下部に互に対向して一対の爪
部材３４，３４を軸３５，３５により回動自在に根着し
、これら爪部材３４，３４の上端部を中性子吸収体収容
ケース９の周壁に形成された透孔３６，３６から突出さ
せて案内管２内面に突設されたストツパ３７，３７にそ
れぞれ係止させたものである。また、この中性子吸収体
収容ケース９の下部内には中空状の車錘容器３８が収容
され、この車鍵容器３８内には不活性ガスが封入されて
いる。そしてこの車錘容器３８内上部には重錘３９が中
性子応動体４０１こよって吊持されている。この中性子
応動体４０は比較的融点が低く、発熱によって溶融する
ように構成されている。そして、この重錘容器３８は冷
却材中に浮遊するように構成され、上端部は中性子吸収
体収容ケース９内に設けられた仕切板４１に当接してい
る。また、この重鍵容器３８の下端部は湊状に形成され
、爪部材３４，３４の下端部間に鉄入している。そして
、この第７実施例は中性子応動体４０が発熱によって溶
融すると車錘３９が落下して重錘容器３８の底面に当り
、その衝撃によって重錘容器３８が下降して爪部材３４
，３４の下端部間に進入し、これら爪部村３４，３４を
回動させてストッパ３７，３７との係合を外し、中性子
吸収体収容ケース９を落下させるものである。この第７
実施例は重錘３９の落下による衝撃力で爪部材３４，３
４を作動させるので、これら爪部材３４，３４の回動に
多少の拘束を生じた場合でもこれらを回動してストッパ
３７，３７との係合を外すことができ、作動の信頼性が
高い。なお、重錘容器３８は浮力によって浮かせずにス
プリング等で弾性的に吊持しておいてもよい。また、第
１０図には本発明の第８実施例を示す。In this seventh embodiment, a pair of claw members 34, 34 are rotatably attached to the lower part of a neutron absorber storage case 9, which accommodates neutron absorbers 10, by means of shafts 35, 35, facing each other. , the upper ends of these claw members 34, 34 are made to protrude from through holes 36, 36 formed in the peripheral wall of the neutron absorber storage case 9, and are respectively engaged with stoppers 37, 37 provided protrudingly provided on the inner surface of the guide tube 2. It is something that Further, a hollow car weight container 38 is housed in the lower part of the neutron absorber storage case 9, and an inert gas is sealed in the car key container 38. A weight 39 is suspended in the upper part of the vehicle weight container 38 by a neutron response body 401. This neutron responsive body 40 has a relatively low melting point and is configured to melt due to heat generation. The weight container 38 is configured to float in the coolant, and its upper end is in contact with a partition plate 41 provided in the neutron absorber storage case 9. Further, the lower end of the heavy key container 38 is formed into a port shape, and an iron is inserted between the lower ends of the claw members 34 and 34. In this seventh embodiment, when the neutron responsive body 40 melts due to heat generation, the wheel weight 39 falls and hits the bottom of the weight container 38, and the weight container 38 descends due to the impact and the claw member 34
, 34, rotates these claw portions 34, 34 to disengage from the stoppers 37, 37, and drops the neutron absorber housing case 9. This seventh
In the embodiment, the claw members 34, 3 are moved by the impact force caused by the fall of the weight 39.
4, even if the rotation of these claw members 34, 34 is somewhat restricted, they can be rotated to disengage from the stoppers 37, 37, and the operation is highly reliable. . Note that the weight container 38 may not be floated by buoyancy but may be elastically suspended by a spring or the like. Further, FIG. 10 shows an eighth embodiment of the present invention.

この第８実施例は案内管２の上端部に中空状の軍錘容器
４２を取付け、この童錘容器４２の底部に取付けた磁石
４３によって中性子吸収体収容ケース９の上端部に取付
けたアーマチュア４４を吸引して中性子吸収体収容ケー
ス９を保持したものである。そして、上記重錘容器４２
内には不活性ガスが封入されているとともにその上部に
は発熱によって溶融する中性子応動体４５によって重錘
４６が吊持されている。そしてこの第８実施例は中性子
応動体４６が溶融することによって重錘４６が落下して
磁石４３に衝突し「その衝撃によってアーマチュア４４
を引き離して中性子吸収体収容ケ−ス９を落下させるも
のである。さらに本発明は上記の各実施例にも限定され
ず、要は核分裂物質を含む中性子応動体の発熱による変
形、溶融その他の物理的変化によって中性子吸収体の保
持を解放して落下させ、炉心に挿入するように構成すれ
ばよい。In this eighth embodiment, a hollow military weight container 42 is attached to the upper end of the guide tube 2, and an armature 44 is attached to the upper end of the neutron absorber storage case 9 by a magnet 43 attached to the bottom of the dowel container 42. The neutron absorber housing case 9 is held by suctioning the neutron absorber. And the weight container 42
An inert gas is sealed inside, and a weight 46 is suspended above the neutron response body 45 which melts due to heat generation. In this eighth embodiment, when the neutron response body 46 melts, the weight 46 falls and collides with the magnet 43.
The neutron absorber housing case 9 is dropped by separating the two. Furthermore, the present invention is not limited to the above-mentioned embodiments, but the point is that the neutron absorber containing fissile material is deformed due to heat generation, melted, and other physical changes to release the neutron absorber and allow it to fall into the reactor core. What is necessary is to configure it so that it can be inserted.

上述の如く本発明は炉心に挿入された案内管の上部に中
性子吸収体を保持しておき、核分裂物質を含む中性子応
動体の発熱による変形、溶融等の物理的変化によって上
訪中性子吸収体の保持を解放し、案内管内を落下させて
炉心に挿入し、炉を停止させるものである。As described above, the present invention holds a neutron absorber in the upper part of a guide tube inserted into a reactor core, and retains the neutron absorber by physical changes such as deformation and melting due to heat generation of the neutron reactor containing fissile material. The guide tube is released and inserted into the reactor core, and the reactor is stopped.

したがって外部からの操作力や信号等に依存することが
なく、信頼性が大であるとともに中性子応動体は炉Ｄか
らの中性子東の増加に直接的に対応して発熱するもので
あるから、応答性にすぐれる等その効果は大である。Therefore, it does not depend on external operating force or signals, and is highly reliable.The neutron-responsive body generates heat in direct response to the increase in neutrons from the reactor D. Its effects are great, including improved sex.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図ないし第３図は本発明の第１実施例を示し、第１
図は全体の縦断面図、第２図は第１図のロー０線に沿う
断面図、第３図は要部の縦断面図である。 また第４図は同第２実施例の要部の縦断面図、第５図は
同第３実施例の姿部の縦断面図、第６図は同第４実施例
の要部の縦断面図、第７図は同第５実施例の要部の縦断
面図、第８図は同第６実施例の姿部の縦断面図、第９図
は同第７実施例の要部の縦断面図、第１０図は同第８実
施例の要部の縦断面図である。１・…・・外筒、２…・
・・案内管、３・・・・・・炉心、６・・・・・・制御
棒、９…・・・中性子吸収体収容ケース、９ａ・・・・
・・中性子吸収体、１０・・・・・・保持解放機構、１
１・・・・・・爪部材、１４・・・・・・ストッパ、１
５，１５′・・・・・・中性子応動体、１７・・・・・
・ストッパ、１９・・・・・・係着部材、２０・・・・
・・中性子応動体、２１・・・・・・中性子吸収体、２
３・・…・落下口、２４・・・・・・中性子応動体、２
８・・・・・・落下口、２９・・・・・・中性子応動体
、３１・・・・・・流下口、３２・・・・・・中性子応
動体、３３・・・・・・中性子吸収体、３４・・・・・
・爪部材、３７・・・・・・ストッパ、３９・・・・・
・車錘、４０・・・・・・中性子応動体、４３・…・・
磁石、４４・・・・・・アーマチュア、４５・・・・・
・中性子応動体、４６・・・・・・車錘。 第１図 第２図 第３図 第４図 第５図 第６図 第７図 第８図 第９図 第１０図1 to 3 show a first embodiment of the present invention.
The figure is a longitudinal sectional view of the whole, FIG. 2 is a sectional view taken along the row 0 line in FIG. 1, and FIG. 3 is a longitudinal sectional view of the main part. Fig. 4 is a vertical sectional view of the main part of the second embodiment, Fig. 5 is a longitudinal sectional view of the main part of the third embodiment, and Fig. 6 is a longitudinal sectional view of the main part of the fourth embodiment. 7 is a vertical sectional view of the main part of the fifth embodiment, FIG. 8 is a vertical sectional view of the main part of the sixth embodiment, and FIG. 9 is a longitudinal sectional view of the main part of the seventh embodiment. The top view and FIG. 10 are longitudinal sectional views of the main parts of the eighth embodiment. 1...outer cylinder, 2...
... Guide tube, 3 ... Core, 6 ... Control rod, 9 ... Neutron absorber housing case, 9a ...
...Neutron absorber, 10...Retention and release mechanism, 1
1...Claw member, 14...Stopper, 1
5,15'...neutron response body, 17...
・Stopper, 19... Attachment member, 20...
...Neutron reactor, 21...Neutron absorber, 2
3... Fall port, 24... Neutron response body, 2
8... Falling port, 29... Neutron response body, 31... Outflow port, 32... Neutron response body, 33... Neutron Absorber, 34...
・Claw member, 37... Stopper, 39...
・Wheel weight, 40...Neutron response body, 43...
Magnet, 44... Armature, 45...
・Neutron response body, 46...wheel weight. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10

Claims (1)

【特許請求の範囲】 １ 炉心に鉛直方向に沿つて挿入された案内管と、この
案内管内上部に設けられたこの案内管内を上記炉心まで
落下可能な中性子吸収体と、上記案内管の上部に設けら
れ上記中性子吸収体を上記案内管上部に保持するととも
に核分裂物質を含有し中性子束の増加によつて温度が上
昇して物理的変化をする中性子応動体を有し、この中性
子応動体の変化によつて上記中性子吸収体の保持を解放
して落下させる保持解放機構とを具備したことを特徴と
する原子炉停止装置。 ２ 前記案内管は制御棒駆動機構によつて駆動される環
状に配置された複数の制御棒の中心に配置されているこ
とを特徴とする前記特許請求の範囲第１項記載の原子炉
停止装置。 ３ 前記中性子吸収体は中性子吸収体収容ケース内に収
容され、また前記保持解放機構は前記中性子応動体の熱
変形によつて上記中性子吸収体収容ケースの保持を解放
するものであることを特徴とする前記特許請求の範囲第
１項記載の原子炉停止装置。 ４ 前記中性子吸収体は流動可能な多数の粒状をなし、
また前記保持解放機構は前記案内管上部を仕切り上記粒
状の中性子吸収体を前記案内管上部に保持する蓋体を有
し前記中性子応動体の熱変形によつて上記蓋体を解放す
るものであることを特徴とする前記特許請求の範囲第１
項記載の原子炉の停止装置。 ５ 前記中性子吸収体は流動可能な多数の粒子をなし、
また前記保持解放機構の中性子応動体は前記案内管の上
部を仕切り上記粒状の中性子吸収体を前記案内管上部に
保持する溶融可能な栓状体に形成され、この栓状の中性
子応動体の溶融により上記粒状の中性子吸収体を落下さ
せるものであることを特徴とする前記特許請求の範囲第
１項記載の原子炉停止装置。 ６ 前記中性子吸収体は液状をなし、また前記保持解放
機構の中性子応動体は前記案内管の上部を仕切り上記液
状の中性子吸収体を前記案内管の上部に保持する溶融可
能な栓状体に形成され、この栓状の中性子応動体の溶融
により上記液状の中性子吸収体を流下させるものである
ことを特徴とする前記特許請求の範囲第１項記載の原子
炉停止装置。 ７ 前記中性子吸収体は中性子吸収体収容ケース内に収
容され、また前記保持解放機構は溶融可能な中性子応動
体によつて吊持された重錘を有しこの重錘の落下による
衝撃によつて上記中性子吸収体収容ケースの保持を解放
するものであることを特徴とする前記特許請求の範囲第
１項記載の原子炉停止装置。[Scope of Claims] 1. A guide tube inserted vertically into the reactor core, a neutron absorber provided at the upper part of the guide tube and capable of falling into the core, and a neutron absorber installed at the upper part of the guide tube. The neutron absorber is provided at the upper part of the guide tube, and the neutron reactor contains a fissile material and undergoes a physical change due to an increase in temperature due to an increase in neutron flux. A nuclear reactor shutdown device comprising: a holding and releasing mechanism for releasing the holding of the neutron absorber and causing it to fall. 2. The nuclear reactor shutdown device according to claim 1, wherein the guide tube is arranged at the center of a plurality of annularly arranged control rods driven by a control rod drive mechanism. . 3. The neutron absorber is housed in a neutron absorber housing case, and the holding and releasing mechanism releases the holding of the neutron absorber housing case by thermal deformation of the neutron responsive body. A nuclear reactor shutdown device according to claim 1. 4. The neutron absorber has a large number of flowable particles,
Further, the holding and releasing mechanism has a lid that partitions the upper part of the guide tube and holds the granular neutron absorber in the upper part of the guide tube, and releases the lid by thermal deformation of the neutron responsive body. Claim 1 is characterized in that:
Shutdown device for nuclear reactor as described in section. 5. The neutron absorber comprises a large number of flowable particles,
Further, the neutron response body of the holding and releasing mechanism is formed into a meltable plug-like body that partitions the upper part of the guide tube and holds the granular neutron absorber at the upper part of the guide tube, and the neutron response body of the plug-shaped neutron response body is melted. 2. The nuclear reactor shutdown device according to claim 1, wherein the granular neutron absorber is caused to fall. 6 The neutron absorber is in a liquid state, and the neutron response body of the holding and releasing mechanism is formed into a meltable plug-like body that partitions the upper part of the guide tube and holds the liquid neutron absorber in the upper part of the guide tube. 2. The nuclear reactor shutdown device according to claim 1, wherein the liquid neutron absorber flows down by melting the plug-shaped neutron reactor. 7. The neutron absorber is housed in a neutron absorber storage case, and the holding and releasing mechanism has a weight suspended by a meltable neutron response body, and is energized by the impact caused by the fall of the weight. The nuclear reactor shutdown device according to claim 1, characterized in that the neutron absorber housing case is released from being held.
JP54155396A 1979-11-30 1979-11-30 Reactor shutdown device Expired JPS6025752B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54155396A JPS6025752B2 (en) 1979-11-30 1979-11-30 Reactor shutdown device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54155396A JPS6025752B2 (en) 1979-11-30 1979-11-30 Reactor shutdown device

Publications (2)

Publication Number Publication Date
JPS5679286A JPS5679286A (en) 1981-06-29
JPS6025752B2 true JPS6025752B2 (en) 1985-06-20

Family

ID=15605036

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54155396A Expired JPS6025752B2 (en) 1979-11-30 1979-11-30 Reactor shutdown device

Country Status (1)

Country Link
JP (1) JPS6025752B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6615605B2 (en) * 2015-12-25 2019-12-04 株式会社東芝 Fast reactor core and fast reactor

Also Published As

Publication number Publication date
JPS5679286A (en) 1981-06-29

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