JPH0723760Y2 - Structure of lower control rod guide tube - Google Patents
Structure of lower control rod guide tubeInfo
- Publication number
- JPH0723760Y2 JPH0723760Y2 JP1989072449U JP7244989U JPH0723760Y2 JP H0723760 Y2 JPH0723760 Y2 JP H0723760Y2 JP 1989072449 U JP1989072449 U JP 1989072449U JP 7244989 U JP7244989 U JP 7244989U JP H0723760 Y2 JPH0723760 Y2 JP H0723760Y2
- Authority
- JP
- Japan
- Prior art keywords
- guide tube
- control rod
- lower guide
- rod lower
- 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.)
- Expired - Lifetime
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
【考案の詳細な説明】 ［産業上の利用分野］ この考案は主として高速増殖炉等に設けられる制御棒下
部案内管の構造に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention mainly relates to the structure of a control rod lower guide tube provided in a fast breeder reactor or the like.
［従来の技術］ 第３図は従来の制御棒下部案内管の構造を示した側面図
で、第４図は第３図のスペーサパッド部の断面図であ
る。第３図において、１はハンドリングヘッド、２は案
内管本体、３はスペーサパッド、４はダッシュポット、
５は下部案内管ピン、６はエントランスノズル、７は連
結管スリーブ、８は支持板、９は燃料集合体を示し、こ
の燃料集合体９は六角形をしたラッパ管からなり、この
内部に多数の燃料棒が収納されているが、図では省略し
ている。[Prior Art] FIG. 3 is a side view showing the structure of a conventional control rod lower guide tube, and FIG. 4 is a cross-sectional view of the spacer pad portion of FIG. In FIG. 3, 1 is a handling head, 2 is a guide tube main body, 3 is a spacer pad, 4 is a dashpot,
5 is a lower guide pipe pin, 6 is an entrance nozzle, 7 is a connecting pipe sleeve, 8 is a support plate, 9 is a fuel assembly, and this fuel assembly 9 is composed of hexagonal trumpet tubes, and a large number of them are provided inside. The fuel rods are stored, but they are omitted in the figure.
また、第５図は第３図の制御棒下部案内管の詳細を示す
側面図である。FIG. 5 is a side view showing details of the control rod lower guide tube of FIG.
上記のように従来の制御棒下部案内管は第３図に示した
ような状態で炉心に配置されており、スペーサパッド３
の部分の水平断面図は第４図に示すような形状で、案内
管２等の胴部より若干外方に突き出しており、その突き
出した部分の水平断面は六角形をしている。そして、こ
の突き出した部分は隣接する６体の燃料集合体９と面接
触する構成になっている。As described above, the conventional control rod lower guide tube is arranged in the core in the state as shown in FIG.
The horizontal cross-sectional view of this portion is as shown in FIG. 4, and it protrudes slightly outward from the body of the guide tube 2 and the like, and the horizontal cross-section of the protruding portion is hexagonal. The protruding portion is in surface contact with the adjacent six fuel assemblies 9.
また、制御棒下部案内管は、流体力による浮上り防止の
ため、下部案内管ピン５を連結管スリーブ７の溝部に入
れ、案内管本体２を周方向に回転させて、固定するもの
である。従って、制御棒下部案内管を交換しようとする
と、第４図に示すように、ハンドリングヘッド１及びス
ペーサパッド３の断面形状が六角形であるため、案内管
本体２の周囲に装荷されている６体の燃料集合体９を引
抜いてから、案内管本体２を回転して、下部案内管ピン
５を連結管スリーブ７の溝から脱出させた後、取外しを
する必要がある。In order to prevent the control rod lower guide tube from rising due to fluid force, the lower guide tube pin 5 is inserted into the groove portion of the connecting tube sleeve 7, and the guide tube body 2 is circumferentially rotated and fixed. . Therefore, when the lower control rod guide tube is to be replaced, as shown in FIG. 4, since the handling head 1 and the spacer pad 3 have a hexagonal cross section, they are loaded around the guide tube body 2. After withdrawing the fuel assembly 9 of the body, it is necessary to rotate the guide tube body 2 so that the lower guide tube pin 5 is released from the groove of the connecting tube sleeve 7 and then removed.
［考案が解決しようとする課題］ 上記のように、従来の制御棒下部案内管を、炉心から引
出す場合、下部案内管ピン５を連結管スリーブ７の溝か
ら外すために案内管本体を周方向に回転する必要があ
る。ところが、前述のように案内管本体の外周に設けら
れたスペーサパッドはその水平断面形状が六角形をして
いるため、これを炉心から引出すために、隣接する周囲
の燃料集合体を取出した後でなければ制御棒下部案内管
を回転させることができず、したがって、交換作業には
多大の時間と労力を要するという問題があった。[Problems to be Solved by the Invention] As described above, when the conventional control rod lower guide tube is pulled out from the core, the guide tube body is circumferentially moved in order to remove the lower guide tube pin 5 from the groove of the connecting tube sleeve 7. Need to turn to. However, since the spacer pad provided on the outer circumference of the guide tube body has a hexagonal horizontal cross-sectional shape as described above, in order to pull out this from the core, Otherwise, the control rod lower guide tube cannot be rotated, and therefore, there has been a problem that the replacement work requires a lot of time and labor.
この考案はかかる課題を解決するためになされたもの
で、隣接する燃料集合体を取出さなくても回転すること
ができ、かつ炉心からの取出しが容易な制御棒下部案内
管を提供することを目的とする。The present invention has been made to solve the above problems, and it is an object of the present invention to provide a control rod lower guide tube that can rotate without taking out an adjacent fuel assembly and that can be easily taken out from the core. To aim.
［課題を解決するための手段］ 上記の目的を達成するために、この考案の制御棒下部案
内管の構造は制御棒下部案内管に設けられたハンドリン
グヘッド及びスペーサパッドの水平断面形状を円形にし
たものである。[Means for Solving the Problems] In order to achieve the above object, the structure of the control rod lower guide tube of the present invention is such that the horizontal cross-sectional shape of the handling head and the spacer pad provided in the control rod lower guide tube is circular. It was done.
［作用］ 上記の構成を有することにより、周囲の燃料集合体を予
め引抜かなくても、周囲の燃料集合体とのスペーサを保
ちつつ、制御棒下部案内管を回転して、浮上り防止のた
めの下部案内管ピンを連結管スリーブの溝から外せるよ
うになった。[Operation] With the above configuration, even if the surrounding fuel assemblies are not pulled out in advance, the control rod lower guide pipe is rotated while maintaining the spacer with the surrounding fuel assemblies to prevent floating. The lower guide tube pin for this can now be removed from the groove of the connecting tube sleeve.
［実施例］ 第１図は本考案の一実施例を示す制御棒下部案内管の水
平断面の形状を示す断面図で、第２図は第１図の制御棒
下部案内管の側面図であり、第３図乃至第５図と同一符
号は同一または相当部分を示すので説明は省略する。[Embodiment] FIG. 1 is a cross-sectional view showing a horizontal cross-sectional shape of a control rod lower guide tube showing an embodiment of the present invention, and FIG. 2 is a side view of the control rod lower guide tube of FIG. 3, the same reference numerals as those in FIGS. 3 to 5 indicate the same or corresponding portions, and the description thereof will be omitted.
第１図、第２図から明らかなように、ハンドリングヘッ
ド１及びスペーサパッド３の水平断面形状を円形にした
ので、制御棒下部案内管は、その周囲６体の炉心内の燃
料集合体９で形成される六角形状内で、回転可能なこと
を示している。As is clear from FIGS. 1 and 2, since the horizontal cross-sectional shape of the handling head 1 and the spacer pad 3 is circular, the control rod lower guide tube is the fuel assembly 9 in the core of the six surrounding bodies. It shows that it can rotate within the hexagonal shape formed.
第１図において、流体力による浮上り防止のため、制御
棒下部案内管に設けた下部案内管ピン５を連結管スリー
グ７の溝部に入れ、制御棒下部案内管を周方向に回転さ
せて固定する浮上り防止機構を設けているが、これに対
しては、炉心内の周囲の燃料集合体９を予め引抜かなく
ても回転して取外しができるので、制御棒下部案内管の
交換は容易に行える。In FIG. 1, in order to prevent floating due to fluid force, the lower guide pipe pin 5 provided in the lower control rod guide pipe is inserted into the groove of the connecting pipe sleek 7, and the lower control rod guide pipe is fixed by rotating in the circumferential direction. However, since it is possible to rotate and remove the peripheral fuel assemblies 9 in the core without pulling them out beforehand, it is easy to replace the control rod lower guide tube. You can do it.
［考案の効果］ 以上説明したとおり、この考案は制御棒下部案内管を交
換する際、周囲の炉心燃料集合体６体を交換前に引き抜
いて、炉内の貯蔵ポットに移す作業及び交換後に炉内の
貯蔵ポットから戻す作業が無くなり、燃料交換時や定期
検査時等に要する時間短縮が図れ、原子炉稼動率の向上
が達成できる。[Effects of the Invention] As described above, when replacing the lower control rod guide tube, the present invention pulls out the six core fuel assemblies in the surroundings before the replacement and transfers them to the storage pot in the reactor and after the replacement. Since the work of returning from the internal storage pot is eliminated, the time required for refueling and periodic inspections can be shortened, and the reactor operating rate can be improved.
第１図は本考案の一実施例を示す制御棒下部案内管の水
平断面の形状を示す断面図、第２図は第１図の制御棒下
部案内管の側面図、第３図は従来の制御棒下部案内管の
構造を示した側面図、第４図は第３図のスペーサパッド
部の断面図、第５図は第３図の制御棒下部案内管の詳細
を示す側面図である。 図中． 1:ハンドリングヘッド 2:案内管本体 3:スペーサパッド 4:ダッシュポット 5:下部案内管ピン 6:エントランスノズル 7:連結管スリーブ、8:支持板 9:炉心燃料集合体、10:制御棒FIG. 1 is a sectional view showing the shape of a horizontal section of a control rod lower guide tube showing an embodiment of the present invention, FIG. 2 is a side view of the control rod lower guide tube of FIG. 1, and FIG. FIG. 4 is a side view showing the structure of the control rod lower guide tube, FIG. 4 is a sectional view of the spacer pad portion of FIG. 3, and FIG. 5 is a side view showing the details of the control rod lower guide tube of FIG. In the figure. 1: Handling head 2: Guide tube body 3: Spacer pad 4: Dash pot 5: Lower guide tube pin 6: Entrance nozzle 7: Connecting tube sleeve, 8: Support plate 9: Core fuel assembly, 10: Control rod
Claims (1)
棒に対する制御棒下部案内管の構造において、前記制御
棒下部案内管に設けられたハンドリングヘッド及びスペ
ーサパッドの水平断面形状を円形にしたことを特徴とす
る制御棒下部案内管の構造。1. A structure of a control rod lower guide tube for a control rod arranged with a fuel assembly in a core, wherein a horizontal cross-sectional shape of a handling head and a spacer pad provided in the control rod lower guide tube is circular. The structure of the lower control rod guide tube, which is characterized in that
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989072449U JPH0723760Y2 (en) | 1989-06-22 | 1989-06-22 | Structure of lower control rod guide tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989072449U JPH0723760Y2 (en) | 1989-06-22 | 1989-06-22 | Structure of lower control rod guide tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0312195U JPH0312195U (en) | 1991-02-07 |
| JPH0723760Y2 true JPH0723760Y2 (en) | 1995-05-31 |
Family
ID=31610395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989072449U Expired - Lifetime JPH0723760Y2 (en) | 1989-06-22 | 1989-06-22 | Structure of lower control rod guide tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0723760Y2 (en) |
-
1989
- 1989-06-22 JP JP1989072449U patent/JPH0723760Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0312195U (en) | 1991-02-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |