JPS6296893A - Method of driving safety rod - Google Patents
Method of driving safety rodInfo
- Publication number
- JPS6296893A JPS6296893A JP60236789A JP23678985A JPS6296893A JP S6296893 A JPS6296893 A JP S6296893A JP 60236789 A JP60236789 A JP 60236789A JP 23678985 A JP23678985 A JP 23678985A JP S6296893 A JPS6296893 A JP S6296893A
- Authority
- JP
- Japan
- Prior art keywords
- safety rod
- safety
- standby position
- core tank
- rod guide
- 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.)
- Granted
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)
- Pressure Welding/Diffusion-Bonding (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】
（産業上の利用分野）
本発明は上部にピストンを有する安全棒を、シリンダー
構造となっている安全棒ガイドの内部な負圧にすること
により、待機位置まで駆動する方法に関する。Detailed Description of the Invention (Industrial Application Field) The present invention drives a safety rod having a piston at the top to a standby position by applying negative pressure inside a safety rod guide having a cylindrical structure. Regarding the method.
（従来の技術）
研究用原子炉や臨界実験装置では、異常時において急激
な反応度印加による原子炉の暴走事故を防止するために
、緊急時に臨界実験装置内に挿入して、核***の連鎖反
応を停止させる安全棒（中性子吸収材）を設置する。(Prior technology) In research reactors and critical experiment equipment, in order to prevent reactor runaway accidents due to sudden application of reactivity in abnormal situations, it is inserted into the critical experiment equipment in an emergency to prevent the chain reaction of nuclear fission. A safety rod (neutron absorbing material) will be installed to stop the
溶液状のウランある〜）はプルトニウム燃料を用いた臨
界実験装置では、高濃度の放射性物質を含んだ飛沫や放
射性ガス等が炉心タンク内に発生するので、これらの物
質が施設や外部に洩れて環境を汚染することのないよう
に炉心タンク内を負圧に維持した密閉構造としている。In a critical experiment device that uses plutonium fuel (which contains uranium in solution form), droplets and radioactive gas containing highly concentrated radioactive substances are generated in the reactor tank, so there is a risk that these substances may leak into the facility or outside. The reactor core tank has a sealed structure that maintains negative pressure in order to prevent environmental pollution.
そして、従来の研究用原子炉においては、安全棒を密閉
構造としているものがあるが、これは安全棒を密閉ハウ
ジング内とし、ノ・ウジングの外から電磁石を用いて待
機位置まで駆動し保持している。In some conventional research reactors, the safety rod has a sealed structure, but in this case, the safety rod is placed inside a sealed housing and is driven and held in the standby position using an electromagnet from outside the nozzle. ing.
（発明が解決しようとする問題点）
しかしながら以上述べた駆動方式は、安全棒を待機位置
に駆動し保持するために、強力な電磁力を必要とし、こ
の電磁力を発生させる電流による発熱のため水等を用い
た冷却を必要とするほか、駆動機構の形状が大きくなり
、装置設計上の大きな欠点となっている。(Problem to be Solved by the Invention) However, the drive method described above requires a strong electromagnetic force to drive and hold the safety rod in the standby position, and the electric current that generates this electromagnetic force generates heat. In addition to requiring cooling using water or the like, the shape of the drive mechanism becomes large, which is a major drawback in terms of device design.
特に溶液燃料を用いる臨界実験装置では、安全棒を装着
する炉心タンクが小さいため、有効な位置に安全棒を配
置することが困難である。Particularly in critical test equipment that uses solution fuel, the core tank in which the safety rods are installed is small, making it difficult to place the safety rods in effective positions.
（問題点を解決するための手段）
本発明は前記欠点を除去すべく、密閉度の高い状態で安
全棒を待機位置まで駆動し、保持する単純な小型の装置
を提供することを目的としている。(Means for Solving the Problems) In order to eliminate the above-mentioned drawbacks, the present invention aims to provide a simple and compact device for driving and holding a safety rod to a standby position in a highly sealed state. .
すなわち、安全棒上部と安全棒ガイドをピストンとシリ
ンダーの関係になる構造とし、シリンダー内部な負圧と
することによって、安全棒を所定の待機位置まで引き上
げるものである。そして、これにより本発明による安全
棒は、その可動部分を全て炉心タンクと同一の雰囲気と
する密閉構造内部に設置することができ、また臨界実験
装置の通常運転時には、炉心上部の待機位置に保持して
おくことができるのである。That is, the safety rod upper part and the safety rod guide are structured to have a piston-cylinder relationship, and by creating negative pressure inside the cylinder, the safety rod is pulled up to a predetermined standby position. As a result, the safety rod according to the present invention can be installed inside a sealed structure in which all of its movable parts are in the same atmosphere as the core tank, and during normal operation of the criticality experiment equipment, it can be maintained in a standby position at the top of the core. You can keep it.
（実施 例） 以下、図面に基づいて本発明の一実施例を説明する。(Example) Hereinafter, one embodiment of the present invention will be described based on the drawings.
図は炉心タンクの上部に本発明の安全棒機構が設置され
た例を示すもので、臨界実験装置の停止状態の場合であ
る。The figure shows an example in which the safety rod mechanism of the present invention is installed in the upper part of the reactor core tank, and shows a case where the criticality experiment equipment is in a stopped state.
ベントライン１はベント系に接続されて、内部は外気よ
り数ｆｉ３〜士数１１（水柱）程度負圧に保たれている
。The vent line 1 is connected to a vent system, and the inside is maintained at a negative pressure of several fi3 to fi11 (water columns) below the outside air.
ベントパルプ２は安全棒ガイド１１の内部を真空にする
際、ベント系からの空気の流れ込みを遮断するためのも
ので通常は開になっている。The vent pulp 2 is used to block the flow of air from the vent system when creating a vacuum inside the safety rod guide 11, and is normally open.
負圧ライン３は真空系に接続されて、安全棒ガイド１１
の内部を真空にする際に用いる。The negative pressure line 3 is connected to the vacuum system, and the safety rod guide 11
Used to create a vacuum inside.
真空パルプ４は安全棒ガイド１１の内部を真空にする際
開けられるもので通常は閉になっている。The vacuum pulp 4 is opened when the inside of the safety rod guide 11 is evacuated, and is normally closed.
上部連結管５は安全棒ガイド１１とベント系および真空
系を結ぶもので、安全棒ガイド１１の内部を真空にする
際には真空系への排気ラインに、安全棒１６が炉心タン
ク１７内へ落下するときにはベント系からの給気ライン
となる。The upper connecting pipe 5 connects the safety rod guide 11 with the vent system and the vacuum system, and when the inside of the safety rod guide 11 is evacuated, the safety rod 16 is connected to the exhaust line to the vacuum system, and the safety rod 16 is connected to the inside of the core tank 17. When it falls, it becomes an air supply line from the vent system.
下部連結管６は安全棒ガイド１１とベント系を結ぶもの
で、安全棒ガイド１１の内部を真空にするときは、ベン
ト系からの給気ラインに、安全棒１６が炉心タンク１７
内へ落下するときはベント系への排気ラインとなる。The lower connecting pipe 6 connects the safety rod guide 11 and the vent system, and when creating a vacuum inside the safety rod guide 11, the safety rod 16 is connected to the air supply line from the vent system, and the safety rod 16 is connected to the core tank 17.
When it falls inside, it becomes an exhaust line to the vent system.
保持電磁石１０は電源ライン７、鉄心８およびコイル９
から構成され、臨界実験装置の運転時には安全棒１６を
電磁力により吸着し待機位置に保持しているが、異常時
には電源断により電磁力をなくし、安全棒１６を炉心タ
ンク１７内に自重により自然落下させる。The holding electromagnet 10 includes a power line 7, an iron core 8 and a coil 9.
During the operation of the critical experiment device, the safety rod 16 is attracted by electromagnetic force and held in the standby position. However, in the event of an abnormality, the electromagnetic force is eliminated by cutting off the power, and the safety rod 16 is automatically moved into the reactor core tank 17 by its own weight. let it fall.
安全棒ガイド１１は安全棒１６が円滑に上下するように
内面が仕上げられ、安全棒１６のアーマチャー１３のガ
イドおよびシリンダーとなる。The safety rod guide 11 has an inner surface finished so that the safety rod 16 can move up and down smoothly, and serves as a guide and a cylinder for the armature 13 of the safety rod 16.
ショツクアプンーバ−１２は安全棒１６が炉心タンク内
へ落下した際の衝撃力を緩和する。The shock absorber 12 relieves the impact force when the safety rod 16 falls into the core tank.
安全棒１６はピストンとなるアーマチャー１３、被覆管
１４および中性子吸収体１５から構成され、臨界実験装
置の運転時には炉心タンク１７の上部待機位置にあり、
異常時には炉心タンク１７内に自重により自然落下する
。The safety rod 16 is composed of an armature 13 serving as a piston, a cladding tube 14, and a neutron absorber 15, and is located at a standby position in the upper part of the core tank 17 during operation of the criticality experiment equipment.
In the event of an abnormality, it naturally falls into the core tank 17 due to its own weight.
炉心タンク１７は臨界実験装置の運転時には、給排液ラ
イン１８から溶液燃料が供給されこれを保持する。During operation of the critical experiment device, the core tank 17 is supplied with solution fuel from the liquid supply/drainage line 18 and holds it.
臨界実験装置の運転時に安全棒１６を待機位置に駆動す
るには先ずベントパルプ２を閉じ真空バルブ４を開ける
ことにより安全棒ガイド１１の内部真空度を上昇させる
。これにより安全棒１６は上方に動き始め保持電磁石１
０に達するまで上昇する。次に保持電磁石１０のコイル
９に電流を流し安全棒１６を保持電磁石１０に電磁力に
よって吸着させ、真空バルブ４を閉じてベントパルプ２
を開げることにより、安全棒ガイド１１内および上部連
結管５内はベント系と同じ負圧レベルに戻り、安全棒１
６が待機状態となる。To drive the safety rod 16 to the standby position during operation of the critical experiment apparatus, first the vent pulp 2 is closed and the vacuum valve 4 is opened to increase the internal vacuum degree of the safety rod guide 11. As a result, the safety rod 16 begins to move upward and the holding electromagnet 1
It increases until it reaches 0. Next, a current is applied to the coil 9 of the holding electromagnet 10 to cause the safety rod 16 to be attracted to the holding electromagnet 10 by electromagnetic force, and the vacuum valve 4 is closed to remove the vent pulp 2.
By opening it, the inside of the safety rod guide 11 and the inside of the upper connecting pipe 5 return to the same negative pressure level as the vent system, and the safety rod 1
6 is in a standby state.
臨界実験装置の異常時には、保持電磁石１０の電源を切
ることにより、安全棒１６を炉心タンク１７内に落下さ
せる。この時、安全棒ガイド１１０安全棒１６の上部に
は上部連結管５を通してベント系より給気され、安全棒
ガイド１１内にありアーマチャー１３より下部の空気は
下部連結管６を通してベント系へ排気され、安全棒１６
は自重たより自然落下する。When an abnormality occurs in the criticality experiment equipment, the safety rod 16 is dropped into the core tank 17 by turning off the power to the holding electromagnet 10. At this time, air is supplied to the upper part of the safety rod guide 110 and the safety rod 16 from the vent system through the upper connecting pipe 5, and the air inside the safety rod guide 11 and below the armature 13 is exhausted through the lower connecting pipe 6 to the vent system. , safety rod 16
falls naturally due to its own weight.
（発明の効果）
以上述べたように、安全棒上部と安全棒ガイドをピスト
ンとシリンダー状の機構とし、シリンダー内部を負圧に
して安全棒を待機位置へ駆動する本発明は、安全棒駆動
機構を小型化、単純化することができる。(Effects of the Invention) As described above, the present invention has a safety rod drive mechanism in which the safety rod upper part and the safety rod guide are made into a piston and cylinder-like mechanism, and the safety rod is driven to the standby position by applying negative pressure inside the cylinder. can be made smaller and simpler.
第１図は炉心タンクの上部に本発明の安全棒機構を設置
した場合の縦断面図である。FIG. 1 is a longitudinal cross-sectional view of the safety rod mechanism of the present invention installed in the upper part of the reactor core tank.
Claims (1)
係になる構造とし、シリンダー内部を負圧にすることに
よつて、安全棒を所定の待機位置まで引抜くことによる
安全棒の駆動方法。A safety rod driving method in which the upper part of the safety rod and the safety rod guide are structured to have a piston-cylinder relationship, and the safety rod is pulled out to a predetermined standby position by creating negative pressure inside the cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60236789A JPH0631778B2 (en) | 1985-10-23 | 1985-10-23 | Driving method of safety rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60236789A JPH0631778B2 (en) | 1985-10-23 | 1985-10-23 | Driving method of safety rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6296893A true JPS6296893A (en) | 1987-05-06 |
| JPH0631778B2 JPH0631778B2 (en) | 1994-04-27 |
Family
ID=17005817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60236789A Expired - Lifetime JPH0631778B2 (en) | 1985-10-23 | 1985-10-23 | Driving method of safety rod |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0631778B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63135892A (en) * | 1986-11-28 | 1988-06-08 | 日本原子力研究所 | Safety rod drive |
-
1985
- 1985-10-23 JP JP60236789A patent/JPH0631778B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63135892A (en) * | 1986-11-28 | 1988-06-08 | 日本原子力研究所 | Safety rod drive |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0631778B2 (en) | 1994-04-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |