JPH02221898A - Assembling method and support lattice for fuel assembly - Google Patents

Assembling method and support lattice for fuel assembly

Info

Publication number
JPH02221898A
JPH02221898A JP1040968A JP4096889A JPH02221898A JP H02221898 A JPH02221898 A JP H02221898A JP 1040968 A JP1040968 A JP 1040968A JP 4096889 A JP4096889 A JP 4096889A JP H02221898 A JPH02221898 A JP H02221898A
Authority
JP
Japan
Prior art keywords
fuel rod
spring
lattice
fuel
presser
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
Application number
JP1040968A
Other languages
Japanese (ja)
Inventor
Masahiro Kameda
亀田 允宏
Kazuichi Suzuki
鈴木 一一
Akio Santo
山藤 明男
Mamoru Gunji
軍司 守
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.)
Mitsubishi Nuclear Fuel Co Ltd
Original Assignee
Mitsubishi Nuclear Fuel Co Ltd
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 Mitsubishi Nuclear Fuel Co Ltd filed Critical Mitsubishi Nuclear Fuel Co Ltd
Priority to JP1040968A priority Critical patent/JPH02221898A/en
Publication of JPH02221898A publication Critical patent/JPH02221898A/en
Pending legal-status Critical Current

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00Energy generation of nuclear origin
    • Y02E30/30Nuclear fission reactors

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  • Monitoring And Testing Of Nuclear Reactors (AREA)

Abstract

PURPOSE:To smoothly and easily insert a fuel rod into a lattice space and to securely support the fuel rod after the insertion by inserting a presser into the lattice space in the inserting direction of the fuel rod. CONSTITUTION:The presser 12 consists of a T-shaped presser main body 12a, a couple of pressure rods 12b formed at the lower end of the center of the main body 12a, and support plates 12c provided on both right and left ends of the main body 12a. Then the presser 12 is inserted into the lattice space in the inserting direction of the fuel rod to press a rib 10e which projects sideward from a spring 10d to outside the lattice space and in this state, the fuel rod is inserted into the lattice space to make it difficult to contact the spring 10d or a dimple 10b when the fuel rod is inserted, thereby easily inserting the fuel rod. The presser 12 is removed after the insertion of the fuel rod and the spring is pressed against the fuel rod to securely support the fuel rod by the spring 10d and dimple 10b.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、燃料集合体を組み立てる際に、燃料棒を格子
空間に挿通し易い燃料集合体の組立方法及び燃料集合体
の支持格子に関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for assembling a fuel assembly that allows easy insertion of fuel rods into the grid space when assembling the fuel assembly, and a support grid for the fuel assembly.

〔従来の技術〕[Conventional technology]

加圧水型軽水炉に装荷される燃料集合体の一例として、
第8図に示すものが知られている。
As an example of a fuel assembly loaded into a pressurized water reactor,
The one shown in FIG. 8 is known.

この図において、符号l及び2は上下方向に離間して対
向配置された上部ノズル及び下部ノズルであり、これら
の上部ノズル1と下部ノズル2との間には、複数の制御
棒案内管3が渡されて固定されている。そして、これら
の制御棒案内管3の中途部には、複数の支持格子4が上
下方向に互いに離間して取り付けられている。
In this figure, numerals 1 and 2 indicate an upper nozzle and a lower nozzle that are vertically spaced and opposed to each other, and between these upper nozzle 1 and lower nozzle 2, a plurality of control rod guide tubes 3 are installed. Passed and fixed. A plurality of support grids 4 are attached to the middle portions of these control rod guide tubes 3 so as to be spaced apart from each other in the vertical direction.

上記支持格子4は、第9図に示すように、複数の薄板帯
状のストラップ5を、その長手方向に等間隔に形成され
たスリットを互いに嵌め合わすことにより互いに直交さ
せ格子状に組んで内部に多数の格子空間6を形成したも
のであり、これらの格子空間6を形成する壁面には燃料
棒7を支持するためのディンプル8とスプリング9とが
互いに対向して形成されている。そして、格子空間6に
挿通された燃料棒7は、スプリング9によりディンプル
8に押圧されて支持されている。
As shown in FIG. 9, the support lattice 4 is constructed by assembling a plurality of thin strip-like straps 5 into a lattice shape by fitting slits formed at equal intervals in the longitudinal direction into each other so as to be orthogonal to each other. A large number of lattice spaces 6 are formed, and dimples 8 and springs 9 for supporting fuel rods 7 are formed on the walls forming these lattice spaces 6 to face each other. The fuel rods 7 inserted into the grid spaces 6 are supported by being pressed against the dimples 8 by springs 9.

次に、上記構成の燃料集合体の組立方法について説明す
る。
Next, a method for assembling the fuel assembly having the above configuration will be explained.

まず、支持格子4を所定の間隔だけ離間させて配置し、
これらの支持格子4の互いに対応する格子空間6の一部
に制御棒案内管3を挿通固定する。
First, the support grids 4 are arranged at predetermined intervals,
Control rod guide tubes 3 are inserted and fixed into portions of mutually corresponding grid spaces 6 of these support grids 4.

その後、制御棒案内管3に支持された支持格子4の格子
空間6に燃料棒7をスプリング9及びディンプル8に摺
動させつつ挿通する。このようにして、各格子空間6内
に燃料棒7をスプリング9及びディンプル8を介して配
置固定する。そして、総ての燃料棒7を挿通終了後、」
二部ノズルl及び下部ノズル2を制御棒案内管3の両端
部にそれぞれ固定する。
Thereafter, the fuel rods 7 are inserted into the grid spaces 6 of the support grid 4 supported by the control rod guide tubes 3 while being slid on the springs 9 and dimples 8. In this way, the fuel rods 7 are arranged and fixed in each grid space 6 via the springs 9 and dimples 8. After inserting all the fuel rods 7,
A two-part nozzle 1 and a lower nozzle 2 are fixed to both ends of the control rod guide tube 3, respectively.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

ところで、上記従来の燃料集合体の組立方法にあっては
、支持格子4の格子空間6に燃料棒7を挿通する際に、
燃料棒7の外周面が、ディンプル8とスプリング9との
間に挾まれ、スプリング9の弾性力に抗しつつ挿し通さ
なければならないため、挿通作業が難しいという問題が
ある。そして、通常、上記挿通作業を容易に行うことと
、挿通後に燃料棒を確実に保持することとは相反する面
を有している。
By the way, in the conventional fuel assembly assembly method described above, when inserting the fuel rods 7 into the lattice spaces 6 of the support lattice 4,
The outer circumferential surface of the fuel rod 7 is sandwiched between the dimple 8 and the spring 9, and it must be inserted while resisting the elastic force of the spring 9, so there is a problem that the insertion work is difficult. In general, facilitating the above-mentioned insertion operation and reliably holding the fuel rod after insertion are contradictory.

本発明は、上記事情に鑑みてなされたもので、その目的
とするところは、格子空間に燃料棒を挿通ずる際に、円
滑にかつ容易に挿通することかでき、しかも燃料棒挿通
後は確実に燃料棒を支持することができる燃料集合体の
組立方法及び燃料集合体の支持格子を提供することにあ
る。
The present invention has been made in view of the above-mentioned circumstances, and its purpose is to enable smooth and easy insertion of fuel rods into the lattice space, and to ensure that the fuel rods are inserted into the lattice space without fail. An object of the present invention is to provide a method for assembling a fuel assembly that can support fuel rods, and a support grid for the fuel assembly.

〔課題を解決するための手段〕[Means to solve the problem]

上記目的を達成するために、本発明の燃料集合体の組立
方法は、燃料棒挿通方向に沿って形成されたスプリング
の側方に突出したリブを、押え具を燃料棒挿通方向に沿
って格子空間に押し込むことにより、格子空間外方に押
圧し、この格子空間に燃料棒を挿通した後に、上記押え
具を取り除いて、上記スプリングを上記燃料揮に押し付
けるものである。
In order to achieve the above object, the method for assembling a fuel assembly of the present invention includes a method for assembling a fuel assembly in which a rib formed along the fuel rod insertion direction that protrudes to the side of a spring is connected to a holding tool in a lattice pattern along the fuel rod insertion direction. By pushing into the space, the fuel rod is pressed outward from the lattice space, and after the fuel rod is inserted into the lattice space, the presser is removed and the spring is pressed against the fuel vapor.

また、本発明の燃料集合体の支持格子は、ストラップの
短手方向に沿ってスプリングが形成され、このスプリン
グの格子空間内方に突出した部分であって、この部分の
側方にリブが突出して形成されたものである。
Further, in the support lattice of the fuel assembly of the present invention, a spring is formed along the short direction of the strap, and a portion of this spring projects inward into the lattice space, and a rib protrudes from the side of this portion. It was formed by

〔作用〕[Effect]

本発明の燃料集合体の組立方法及び燃料集合体の支持格
子にあっては、押え具を燃料棒挿通方向に沿って格子空
間に挿し込むことによって、スプリングの側方に突出し
たリブを格子空間外方に押圧した状態において、」二記
格子空間に燃料棒を挿通ずることにより、燃料棒挿通後
にスプリングあるいはディンプルと燃料棒とが接触しに
くくなり、燃料棒を容易に挿通させることができる上に
、燃料棒挿通後に、上記押え具を取り除くことにより、
燃料棒にスプリングを押し付けて、燃料棒をスプリング
とディンプルとによって確実に支持する。
In the method for assembling a fuel assembly and the support grid for a fuel assembly of the present invention, by inserting the presser into the grid space along the fuel rod insertion direction, the ribs protruding to the side of the spring can be moved into the grid space. By inserting the fuel rod into the lattice space marked 2 in the state of being pressed outward, it becomes difficult for the spring or dimple to come into contact with the fuel rod after the fuel rod is inserted, and the fuel rod can be easily inserted. By removing the above-mentioned holding device after inserting the fuel rod,
A spring is pressed against a fuel rod to ensure that the fuel rod is supported by the spring and dimples.

〔実施例〕〔Example〕

以下、第1図ないし第7図に基づいて本発明の詳細な説
明する。
Hereinafter, the present invention will be explained in detail based on FIGS. 1 to 7.

第1図は本発明の一実施例の支持格子を示す斜視図であ
る。この支持格子IOは、格子状に組まれた内ストラツ
プlOaの四周に外ストラツプ(図示せず)が取付けら
れたものであり、格子空間を形成する壁部10aには、
ストラップの長手方向に沿って2列状のディンプル10
bが一方側に突出して形成されている。そして、ディン
プル10bの上下にはコルゲージリンIOCが形成され
ている。また、上下一対のディンプルfobの間には、
ストラップの短手方向に沿って(上下方向に沿って)、
山形のスプリングlodが上記ディンプルtabの突出
方向と反対の方向に突出して形成されており、このスプ
リング10dの中央部(ffiも突出している部分)の
両脇には、L字状のリブ10eがそれぞれ形成されてい
る。そして、上記スプリングlodの両脇にはストラッ
プ10Cが設けられている。
FIG. 1 is a perspective view showing a support grid according to an embodiment of the present invention. This support grid IO has outer straps (not shown) attached to the four circumferences of inner straps lOa arranged in a grid shape, and a wall portion 10a forming a grid space has
Two rows of dimples 10 along the length of the strap
b is formed to protrude to one side. Further, corrugated ring IOCs are formed above and below the dimple 10b. In addition, between the upper and lower pair of dimple fobs,
Along the short direction of the strap (along the vertical direction),
A chevron-shaped spring lod is formed to protrude in the opposite direction to the protruding direction of the dimple tab, and L-shaped ribs 10e are provided on both sides of the center portion of this spring 10d (the portion from which ffi also protrudes). each formed. Straps 10C are provided on both sides of the spring rod.

上記り字状のリブloeは、上記スプリングlOdの中
央部からスプリングlodの突出方向と反対の方向くデ
ィンプル10bの突出方向)に延出する支持部logと
、この支持部10gからストラップの長平方向に延出す
る翼部10hとから構成されている。そして、第1図に
示すように、上記スプリングlodに負何が加わってい
ない自由状態において、上記リブ10eの翼部tohは
、格子空間を形成する壁面から所定距離内方に寄った位
置に設定されている(第4図参照)。
The L-shaped rib loe has a support portion log extending from the center of the spring lOd in a direction opposite to the protrusion direction of the spring lod (a protrusion direction of the dimple 10b), and a support portion log extending from the support portion 10g in the longitudinal direction of the strap. It is composed of a wing portion 10h that extends to. As shown in FIG. 1, in a free state in which no negative force is applied to the spring lod, the wing portion toh of the rib 10e is set at a position a predetermined distance inward from the wall surface forming the lattice space. (See Figure 4).

上記のように構成された支持格子10の格子空間10i
に燃料棒11を挿通ずる場合には、あらかじめ、リブ1
0eの翼部10hを押え、燃料棒11と接触しない位置
までスプリングlodを変位させておく。
Grid space 10i of support grid 10 configured as described above
When inserting the fuel rod 11 into the rib 1,
Hold down the wing portion 10h of 0e and displace the spring rod to a position where it does not come into contact with the fuel rod 11.

この変位を4丸る手段としては、例えば、第2図に示す
ような押え具12が用いられる。この押丸具12は、T
字状の押え具本体12aと、この押尤具本体12aの中
央下端(′「字分岐端)に形成された一対の押圧棒12
bと、上記押え具本体12aの左右両端に設けられた支
持板12cとから構成されている。そして、上記両押圧
搾12bの先端は先細状に形成され、かつ両押圧搾12
bは、スプリング10dの両脇のリブlOeの翼部10
hに対応して所定間隔離間して互いに平行に設けられて
いる。また、上記押え具本体12aと支持板12cとの
間には、ストラップ10aの厚さより若干大きい間隙1
2dが形成されていると共に、該支持板12cの先端部
の、上記押え具本体12a側の面には、傾斜面12eが
形成されている。そして、両支持板12c間には、格子
空間10iを形成する、対向配置された一対のストラッ
プlOaより大きい間隔が設定されている。さらに、第
4図に示すように、上記各押圧棒12bの先端が上記翼
部10hに当接する位置において、上記各支持板12C
の先端が、内ストラツプ10aの、スプリング10dが
突出しているのと反対側の壁面側(ディンプルIObが
突出している側の壁面側)に位置するように設定されて
いる。さらにまた、第3図に示すものは、両支持板12
cが1つの格子空間10i内に挿入できるように、両支
持板12Cの間隔が小さく設定された押え具12°であ
り、その他の構成は上記押え具12と同様なので同符号
を付して説明を省略する。
As a means for rounding this displacement, for example, a presser 12 as shown in FIG. 2 is used. This presser tool 12 is T
A letter-shaped presser main body 12a, and a pair of press rods 12 formed at the lower center end ('''-shaped branch end) of the presser main body 12a.
b, and support plates 12c provided at both left and right ends of the presser main body 12a. The tip of the double press 12b is formed into a tapered shape, and the double press 12b has a tapered tip.
b is the wing portion 10 of the rib lOe on both sides of the spring 10d.
They are provided parallel to each other and spaced apart by a predetermined distance corresponding to h. Further, there is a gap 1 slightly larger than the thickness of the strap 10a between the presser main body 12a and the support plate 12c.
2d is formed, and an inclined surface 12e is formed on the surface of the tip of the support plate 12c facing the presser main body 12a. A distance is set between both support plates 12c that is larger than the pair of straps lOa that are arranged opposite to each other and form the lattice space 10i. Furthermore, as shown in FIG. 4, each of the support plates 12C is located at a position where the tip of each of the pressure rods 12b abuts the wing portion 10h.
The tip of the inner strap 10a is located on the wall surface side opposite to the side from which the spring 10d protrudes (the wall surface side on the side from which the dimple IOb protrudes). Furthermore, what is shown in FIG.
This is a presser 12° in which the spacing between both support plates 12C is set small so that C can be inserted into one lattice space 10i, and the other configuration is the same as the presser 12 described above, so the same reference numerals are given and explained. omitted.

上記構成の押え具12.12°を燃料棒挿通に先だって
格子空RJI 10 iに挿入していくと、第4図と第
5図に示すように、押圧棒12bがリブlOeの翼部t
ohに接触した状態において、支持板12Cの傾斜面1
2eにストラップ10aの端部が接触しながら間隙12
d内に嵌まり込んでい(。この結果、上記押圧棒12b
は、リブ10eの翼部tohを格子空間lO1外方側に
押し付けるから、スプリングlOdとこのスプリングに
、対向しているディンプル10bとの間に燃料棒11を
挿通させるのに十分な間隔が形成される。
When the presser 12.12° having the above configuration is inserted into the lattice empty RJI 10i prior to the insertion of the fuel rod, the presser rod 12b presses against the wing portion t of the rib lOe, as shown in FIGS. 4 and 5.
In the state of contact with oh, the inclined surface 1 of the support plate 12C
2e while the end of the strap 10a is in contact with the gap 12.
d (.As a result, the above-mentioned pressing rod 12b
Since the wing portion toh of the rib 10e is pressed against the outer side of the lattice space lO1, a sufficient gap is formed between the spring lOd and the dimple 10b facing the spring to allow the fuel rod 11 to pass through. Ru.

この状態において、燃料棒11を格子空間10iに容易
に挿通した後に、上記押え具12.12゜を格子空11
1110 +から引き抜(と、今まで、スプリングlo
dを格子空間101外方側に付勢していた押圧力が取り
除かれるから、スプリング10dが格子空間101内方
側に移動して、燃料棒11は、スプリング10dとディ
ンプルlObとの間に確実に支持される(第6図におい
て、下側のスプリング10dは燃料棒挿通時の位置を、
かつ左側のスプリング10dは燃料棒保持状態を示して
いる)。
In this state, after easily inserting the fuel rod 11 into the lattice space 10i, the holding tool 12.12° is inserted into the lattice space 10i.
Pulled out from 1110 + (and until now, spring lo
Since the pressing force that had been urging d to the outside of the lattice space 101 is removed, the spring 10d moves inward to the lattice space 101, and the fuel rod 11 is securely placed between the spring 10d and the dimple lOb. (In Fig. 6, the lower spring 10d is at the position when the fuel rod is inserted,
The spring 10d on the left side shows the fuel rod holding state).

さらに、第7図は押え具の別の一例を示すもので、この
押え具12”は、2個の押え具12°を、互いに直交し
た状態で連結したもので、この押え具12”を用いれば
、一つの格子空間10+における一対のスプリングlo
dを同時に操作することができる。なお、上記実施例に
おいては、押え具12.12’   12”を用いた場
合について説明したが、上記押え具12.12’、12
”を用いずに、組立治具にリブ押え装置を設け、リブ押
え操作を自動化することも可能である。
Furthermore, FIG. 7 shows another example of the presser tool, and this presser tool 12'' is made by connecting two presser tools 12° orthogonally to each other. For example, a pair of springs lo in one lattice space 10+
d can be operated simultaneously. In addition, in the above embodiment, the case where the presser tools 12.12' and 12'' were used was explained, but the presser tools 12.12' and 12'' are used.
It is also possible to automate the rib pressing operation by providing a rib pressing device in the assembly jig without using ``.

〔発明の効果〕〔Effect of the invention〕

以上説明したように、本発明の燃料集合体の組立方法は
、燃料棒挿通方向に沿って形成されたスプリングの側方
に突出したリブを、押え具を燃料棒挿通方向に沿って格
子空間に挿し込むことにより、格子空間外方に押圧し、
この格子空間に燃料棒を挿通した後に、上記押え具を取
り除いて、上記スプリングを上記燃料棒に押し付けるも
のであるから、燃料棒挿通方向に沿って格子空間に挿し
込まれた押え具によって、スプリングの側方に突出した
リブを格子空間外方に押圧した状態において、上記格子
空間に燃料棒を挿通ずることにより、燃料棒挿通時にス
プリングあるいはディンプルと燃料棒とが接触しにくく
なり、燃料棒を容易に挿通させることができる上に、燃
料棒の外表面にスクラッチが発生することを防止できる
As explained above, in the method for assembling a fuel assembly of the present invention, the ribs protruding to the side of the springs formed along the fuel rod insertion direction are moved by moving the presser into the lattice space along the fuel rod insertion direction. By inserting it, it is pressed outward into the lattice space,
After the fuel rod is inserted into the lattice space, the presser is removed and the spring is pressed against the fuel rod. By inserting the fuel rod into the lattice space in a state in which the sidewardly projecting ribs are pressed outward from the lattice space, it becomes difficult for the spring or dimple to come into contact with the fuel rod when the fuel rod is inserted. Not only can it be easily inserted, it can also prevent scratches from occurring on the outer surface of the fuel rod.

また、本発明の燃料集合体の支持格子は、ストラップの
短手方向に沿ってスプリングが形成され、このスプリン
グの格子空間内方に突出した部分であって、この部分の
側方にリブが突出して形成されたものであるから、リブ
にかかる押圧力を解除することにより、スプリングとデ
ィンプルとによって燃料棒を確実に支持することができ
る上に、従。
Further, in the support lattice of the fuel assembly of the present invention, a spring is formed along the short direction of the strap, and a portion of this spring projects inward into the lattice space, and a rib protrudes from the side of this portion. By releasing the pressing force applied to the ribs, the fuel rods can be reliably supported by the springs and dimples.

来の支持格子のスプリング部のみを変更するだけでよ<
、製作が容易である。
Just change only the spring part of the support grid.
, easy to manufacture.

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

第1図は本発明の一実施例を示す支持格子の斜視図、第
2図は押え具の一例を示す斜視図、第3図は押九具の他
の一例を示す斜視図、第4図は押え具を挿入する状態の
説明図、第5図は押え具を押管した状態の説明図、第6
図は燃料棒が挿通された支持格子の平面図、第7図は押
え具の別の一例を示す斜視図、第8図は従来の燃料集合
体の正面図、第9図は従来の支持格子部の平面図である
。 10・・・・・・支持格子、11・・・・・・燃料棒、
12.12’、12”・・・・・・押え具、loa・・
・・・・内ストラツプ(壁部)、10b・・・・・・デ
ィンプル、10d・・・・・・スプリング、10e・・
・・・・リブ、101・・・・・・格子空間。 第8図
FIG. 1 is a perspective view of a support grid showing an embodiment of the present invention, FIG. 2 is a perspective view of an example of a presser, FIG. 3 is a perspective view of another example of a presser, and FIG. Fig. 5 is an explanatory diagram of the state in which the presser is inserted, Fig. 5 is an explanatory diagram of the state in which the presser is inserted, and Fig. 6
The figure is a plan view of a support grid into which fuel rods are inserted, FIG. 7 is a perspective view showing another example of a holding device, FIG. 8 is a front view of a conventional fuel assembly, and FIG. 9 is a conventional support grid. FIG. 10...Support grid, 11...Fuel rod,
12.12', 12"...presser, loa...
...inner strap (wall), 10b... dimple, 10d... spring, 10e...
...Rib, 101... Lattice space. Figure 8

Claims (2)

【特許請求の範囲】[Claims] (1)支持格子の格子空間に燃料棒が挿通され、この燃
料棒が上記格子空間を画成する壁部に対向形成されたデ
ィンプル及びスプリングに支持された燃料集合体を組み
立てるに際し、 燃料棒挿通方向に沿って形成されたスプリングの側方に
突出したリブを、押え具を燃料棒挿通方向に沿って格子
空間に押し込むことにより、格子空間外方に押圧し、こ
の格子空間に燃料棒を挿通した後に、上記押え具を取り
除いて、上記スプリングを上記燃料棒に押し付けること
を特徴とする燃料集合体の組立方法。
(1) When assembling a fuel assembly in which a fuel rod is inserted into the lattice space of the support lattice, and the fuel rod is supported by dimples and springs formed oppositely on the wall defining the lattice space, the fuel rod insertion is performed. By pushing the holding tool into the lattice space along the fuel rod insertion direction, the ribs that protrude to the side of the spring formed along the direction are pressed outward from the lattice space, and the fuel rod is inserted into the lattice space. After that, the presser is removed and the spring is pressed against the fuel rod.
(2)複数の薄板帯状をなすストラップを互いに交差さ
せて多数の格子空間を形成し、これらの格子空間を形成
するストラップに、スプリングとこのスプリングに対向
配置されるディンプルとを形成してなる燃料集合体の支
持格子において、 上記ストラップの短手方向に沿ってスプリングが形成さ
れ、このスプリングの格子空間内方に突出した部分であ
って、この部分の側方にリブが突出して形成されたこと
を特徴とする燃料集合体の支持格子。
(2) A fuel in which a plurality of straps in the form of thin plate bands are crossed with each other to form a large number of lattice spaces, and the straps forming these lattice spaces are formed with springs and dimples arranged opposite to the springs. In the support lattice of the aggregate, a spring is formed along the short direction of the strap, and a portion of this spring projects inward of the lattice space, and a rib is formed to protrude from the side of this portion. A support grid for a fuel assembly characterized by:
JP1040968A 1989-02-21 1989-02-21 Assembling method and support lattice for fuel assembly Pending JPH02221898A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1040968A JPH02221898A (en) 1989-02-21 1989-02-21 Assembling method and support lattice for fuel assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1040968A JPH02221898A (en) 1989-02-21 1989-02-21 Assembling method and support lattice for fuel assembly

Publications (1)

Publication Number Publication Date
JPH02221898A true JPH02221898A (en) 1990-09-04

Family

ID=12595267

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1040968A Pending JPH02221898A (en) 1989-02-21 1989-02-21 Assembling method and support lattice for fuel assembly

Country Status (1)

Country Link
JP (1) JPH02221898A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5531532A (en) * 1993-09-24 1996-07-02 Esselte Meto International Gmbh Printer and a printer with a fastening device for attaching a peripheral device to the printer
KR100432581B1 (en) * 2001-07-10 2004-05-24 한국수력원자력 주식회사 Spacer Grid for Uniform Conformal Contact with Fuel Rod and for Extending the Elastic Range of the Grid Spring
CN103578577A (en) * 2012-08-06 2014-02-12 韩电原子力燃料株式会社 Spacer grid for a nuclear fuel assembly to reduce flow-induced vibration

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61225695A (en) * 1985-03-28 1986-10-07 ウエスチングハウス エレクトリック コ−ポレ−ション Method and device for charging fuel rod to lattice for fuel aggregate

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61225695A (en) * 1985-03-28 1986-10-07 ウエスチングハウス エレクトリック コ−ポレ−ション Method and device for charging fuel rod to lattice for fuel aggregate

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5531532A (en) * 1993-09-24 1996-07-02 Esselte Meto International Gmbh Printer and a printer with a fastening device for attaching a peripheral device to the printer
KR100432581B1 (en) * 2001-07-10 2004-05-24 한국수력원자력 주식회사 Spacer Grid for Uniform Conformal Contact with Fuel Rod and for Extending the Elastic Range of the Grid Spring
CN103578577A (en) * 2012-08-06 2014-02-12 韩电原子力燃料株式会社 Spacer grid for a nuclear fuel assembly to reduce flow-induced vibration

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