JPH01242992A - Support lattice - Google Patents
Support latticeInfo
- Publication number
- JPH01242992A JPH01242992A JP63070153A JP7015388A JPH01242992A JP H01242992 A JPH01242992 A JP H01242992A JP 63070153 A JP63070153 A JP 63070153A JP 7015388 A JP7015388 A JP 7015388A JP H01242992 A JPH01242992 A JP H01242992A
- Authority
- JP
- Japan
- Prior art keywords
- strap
- thin plate
- projection
- welded
- longitudinal direction
- 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
- 238000003466 welding Methods 0.000 description 23
- 239000003758 nuclear fuel Substances 0.000 description 6
- 102100027340 Slit homolog 2 protein Human genes 0.000 description 4
- 101710133576 Slit homolog 2 protein Proteins 0.000 description 4
- 239000002826 coolant Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 101100049616 Drosophila melanogaster Strump gene Proteins 0.000 description 1
- 206010000496 acne Diseases 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
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
- Clamps And Clips (AREA)
- Cell Electrode Carriers And Collectors (AREA)
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野」
この発明は、核燃料集合体の支持格子に係わり、特にそ
の機械的強度を増大させたものに関する。DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a support grid for a nuclear fuel assembly, and particularly to one with increased mechanical strength.
「従来の技術」
原子炉に装荷される核燃料集合体は、多数の円柱状の燃
料ペレットを密封した多数の長尺の核燃料棒を一定の間
隔をおいて互いに平行になるように配置して形成されて
いる。``Prior art'' A nuclear fuel assembly loaded into a nuclear reactor is formed by arranging a large number of long nuclear fuel rods, in which a large number of cylindrical fuel pellets are sealed, parallel to each other at regular intervals. has been done.
上記核燃料棒をこのような位置関係に配置する手段とし
て支持格子が用いられている。A support grid is used as a means for arranging the nuclear fuel rods in such a positional relationship.
この支持格子は、第５図に示すような耐熱合金製の帯状
の薄板１にスリット２が形成された多数のストラップ３
を、スリット２を介して縦横に組んで格子状に形成され
たものである。This support grid consists of a large number of straps 3 in which slits 2 are formed in a belt-shaped thin plate 1 made of heat-resistant alloy, as shown in FIG.
are arranged vertically and horizontally through slits 2 to form a lattice shape.
すなわち、上記薄板１には、その一端縁から同薄板の長
手方向と直交する方向に向けて中央部まで切り込んでな
るスリット２が薄板１の長手方向に一定間隔毎に形成さ
れている。また、薄板１の一端縁には半円板状の溶接タ
ブ４がスリット２と同間隔毎に形成されており、各溶接
タブ４にはスリット２と同幅のスリット４ａがスリット
２の延長上に形成されている。一方、薄板ｌの他端縁に
は、上記溶接タブ４と対向する位置に半円板状の溶接タ
ブ５が形成されている。また、各溶接タブ５の直下の薄
板１の表裏面には、ピンプルと呼ばれる突起６．６が薄
板１の長手方向に薄板１の板厚と略同幅だけ離間して形
成されている。That is, in the thin plate 1, slits 2 are formed at regular intervals in the longitudinal direction of the thin plate 1, by cutting from one edge thereof to the center in a direction perpendicular to the longitudinal direction of the thin plate. In addition, semicircular welding tabs 4 are formed at one end edge of the thin plate 1 at the same intervals as the slits 2, and each welding tab 4 has a slit 4a having the same width as the slit 2 on the extension of the slit 2. is formed. On the other hand, a semicircular welding tab 5 is formed on the other edge of the thin plate 1 at a position facing the welding tab 4 described above. Further, on the front and back surfaces of the thin plate 1 directly below each welding tab 5, projections 6.6 called pimples are formed at intervals in the longitudinal direction of the thin plate 1 by approximately the same width as the thickness of the thin plate 1.
また、薄板ｌの幅方向中央部でかつスリット２の藺には
、核燃料棒を支持するための薄板１から突出するスプリ
ング７がスリット２と同間隔毎に形成されており、各ス
プリング７を薄板１の幅方向において挾む位置にはスプ
リング７の突出方向と逆方向に突出して核燃料棒を支持
するだめのデインプル８が形成されている。In addition, springs 7 protruding from the thin plate 1 for supporting the nuclear fuel rods are formed at the same intervals as the slits 2 at the center in the width direction of the thin plate 1 and at the side of the slit 2. A dimple 8 is formed at a position sandwiching the spring 1 in the width direction so as to protrude in a direction opposite to the direction in which the spring 7 protrudes and supports the nuclear fuel rod.
さらに、各デインプル８の外側には、薄板１をデインプ
ル８の突出方向と同方向に断面円弧状にかつ薄板１の長
手方向に延びるように張り出してなるコルゲーション（
突条）１０．１０が薄板１の長手方向に所定間隔毎に形
成されている。このコルゲーション１０は、ストラップ
３の座屈強度を増大させるためのものであり、その長さ
は隣接するスリット２．２間の長さより短く設定されて
いる。Furthermore, on the outside of each dimple 8, a corrugation (corrugation) is formed by protruding the thin plate 1 so as to have an arcuate cross section in the same direction as the protruding direction of the dimple 8 and extending in the longitudinal direction of the thin plate 1.
Projections 10, 10 are formed at predetermined intervals in the longitudinal direction of the thin plate 1. This corrugation 10 is for increasing the buckling strength of the strap 3, and its length is set shorter than the length between adjacent slits 2.2.
そして、上記支持格子は、第６図に示すように、縦部材
を構成するストラップ３のスリット２と横部材を構成す
るストラップ３のスリット２とを突き合わせて、これら
ストラップ３を互いに直交する位置関係に保持しつつ互
いのスリット２にはめ込むと共に突起６．６間に挾持さ
せることにより位置決め仮固定し、さらに溶接タブ４．
５にレーザビーム等を照射して、これら溶接タブ４．５
を溶融固化させることにより、交差部の端部を溶接する
ことにより形成されている。As shown in FIG. 6, the support grid is constructed by aligning the slits 2 of the straps 3 constituting the vertical members with the slits 2 of the straps 3 constituting the horizontal members, so that these straps 3 are arranged in a positional relationship perpendicular to each other. The welding tabs 4.6 are held in position and temporarily fixed by fitting them into the respective slits 2 and sandwiching them between the protrusions 6.6, and then welding tabs 4.6.
These welding tabs 4.5 are irradiated with a laser beam or the like to
It is formed by melting and solidifying the material and welding the ends of the intersection.
「発明が解決しようとする課題」
ところで、上記支持格子にあっては、これを構成するス
トラップ３にスリット２および突起６が形成されている
ため、コルゲーション１Ｇを不連続に形成せざるを得な
かった。したが）て、このコルゲーションＩＯの端部と
ストラッグ３同士の溶接部との間の座屈強度が弱く、地
震等により支持格子に大きな荷重が作用した場合に、こ
の部分が座屈する恐れがあっＩ；。"Problem to be Solved by the Invention" By the way, in the above-mentioned support grid, since the slits 2 and the protrusions 6 are formed in the strap 3 constituting the support grid, the corrugations 1G have to be formed discontinuously. Ta. However, the buckling strength between the end of the corrugation IO and the welded part between the strugs 3 is weak, and there is a risk that this part will buckle if a large load is applied to the support grid due to an earthquake or the like. I;.
上記のような欠点を改善するものとして特開昭６２−１
４８８９２号公報に記載のものがある。To improve the above-mentioned drawbacks, JP-A-62-1
There is one described in Japanese Patent No. 48892.
これに記載の支持格子は、第７図に示すように、薄帯板
（ストラップ）１１の端縁に波状部（コルゲーション）
１２を同端縁に沿い一体的に形成して、同各波状部１２
の交差部を溶着金属により接合したものである。As shown in FIG.
12 are integrally formed along the same end edge, and each of the same wavy portions 12
The intersections of the two are joined using welded metal.
しかし、この支持格子では、上記溶接タブ４゜５が形成
されておらず、しかも薄帯板１１を格子状に組んだ際に
、波状部１２が交差点回りに不均等に配置され、よって
、各波状部１１の交差部を溶接すると、支持格子の平面
視に８いて、溶接部が薄帯板１１の交差点回りに不均等
に配置されてしまい、溶接強度の点において信頼性に欠
けるという問題があった。However, in this support lattice, the welding tabs 4.degree. When the intersections of the corrugated portions 11 are welded, the welded portions are unevenly arranged around the intersections of the thin strip plates 11 when viewed from the top of the support grid, resulting in a problem of lack of reliability in terms of welding strength. there were.
「発明の目的」
この発明は、上記事情に鑑みてなされたものであり、従
来より機械的強度の優れた支持格子を提供することをそ
の目的としている。``Object of the Invention'' The present invention was made in view of the above circumstances, and an object of the present invention is to provide a support grid having better mechanical strength than the conventional one.
「課題を解決するための手段」
この発明の支持格子は、多数のストラップを、それに形
成されたスリット同士を互いに嵌合することにより格子
状に交差させ、この交差部の端部を接合してなり、上記
スリット間以外の上記ストラップの表裏面に、ストラッ
プの長手方向に延びかつストラップ表裏面から突出する
突条をストラップの長手方向に所定間隔を隔てて形成し
、これら突条の端部が、交差するストラップの表裏面に
当接すると共に、この当接部を溶接したことを特徴とし
ている。"Means for Solving the Problems" The support lattice of the present invention has a number of straps intersected in a lattice shape by fitting the slits formed therein with each other, and joining the ends of the intersections. Projections extending in the longitudinal direction of the strap and protruding from the front and back surfaces of the strap are formed at predetermined intervals in the longitudinal direction of the strap on the front and back surfaces of the strap other than between the slits, and the ends of these projections , is characterized in that it abuts the front and back surfaces of the intersecting straps, and that the abutting portions are welded.
「作用」
この発明の支持格子にあっては、ストラップの長手方向
に互いに離間する突条の端部と、交差するストラップの
表裏面との当接部を溶接することにより、突条がストラ
ップの長手方向に連続すると共に溶接箇所が従来より増
加するので、ストラップの座屈強度が向上し、この結果
支持格子の機械的強度が向上する。"Function" In the support grid of the present invention, the ends of the protrusions that are spaced apart from each other in the longitudinal direction of the strap are welded to the abutting parts of the front and back surfaces of the strap that intersect, so that the protrusions are attached to the strap. Since it is continuous in the longitudinal direction and the number of welding points is increased compared to the conventional method, the buckling strength of the strap is improved, and as a result, the mechanical strength of the support grid is improved.
「実施例」
第１図ないし第４図は、この発明の支持格子の一実施例
を示すものであり、これらの図に示す支持格子と、第６
図に示す支持格子との共通部分には同一符号を付してそ
の説明を省略する。"Embodiment" FIGS. 1 to 4 show an embodiment of the support grid of the present invention, and the support grid shown in these figures and the sixth embodiment are shown in FIGS.
The same reference numerals are given to the parts common to the support grid shown in the figure, and the explanation thereof will be omitted.
これらの図に示す支持格子は、ストラップ３の一端縁（
スリット２が形成されていない側の端縁）より若干中央
側の表面に、薄板１をデインプル８の突出方向と同方向
に断面円弧状にかつ薄板ｌの長手方向に延びるように張
り出してなるコルゲーション（突条）２０＆が薄板ｌの
長手方向に所定間隔毎に形成されると共に、裏面に、薄
板１をスプリング７の突出方向と同方向に断面円弧状に
かつ薄板ｌの長手方向に延びるように張り出してなるコ
ルゲーション（突条）２０ｂが、コルゲーション２０ａ
の直下にこれと同間隔毎に形成されている。The support grid shown in these figures is located at one end edge of the strap 3 (
A corrugation formed by projecting the thin plate 1 so as to have an arcuate cross section in the same direction as the protruding direction of the dimples 8 and extending in the longitudinal direction of the thin plate 1 on the surface slightly toward the center of the edge (the edge on the side where the slit 2 is not formed). (Protrusions) 20 & are formed at predetermined intervals in the longitudinal direction of the thin plate 1, and on the back side, the thin plate 1 has an arcuate cross section in the same direction as the protruding direction of the spring 7 and extends in the longitudinal direction of the thin plate 1. The protruding corrugation 20b is the corrugation 20a.
They are formed immediately below at the same intervals.
そして、互いに薄板１の長手方向に隣接するコルゲーシ
ョン２０１，２０１（２０ｂ、２ Ｑｂ）間の距離は薄
板１の厚さと略等しく設定されている。これらコルゲー
ション２０１（２０ｂ）の端部は、交差するストラップ
３の表裏面に当接しており、この当接部は溶接されてい
る。The distance between the corrugations 201, 201 (20b, 2Qb) adjacent to each other in the longitudinal direction of the thin plate 1 is set to be approximately equal to the thickness of the thin plate 1. The ends of these corrugations 201 (20b) are in contact with the front and back surfaces of the intersecting straps 3, and these contact portions are welded.
また、上記ストラップ３の各打抜部２２の左右両側でか
つスリット２．２間に位置していない部分の表面には、
上記コルゲーション２０１と同方向に突出するコルゲー
ション２３１，２３１が形成されると共に、裏面には上
記コルゲーション２０ｂと同方向に突出するコルゲーシ
ョン２３ｂ、２３ｂが形成されている。これらコルゲー
ション２３１（２３ｂ）の端部は、交差するスリット３
の表裏面に当接しており、この当接部は溶接されている
。Further, on the surface of the portions of the strap 3 on the left and right sides of each punched portion 22 and not located between the slits 2.2,
Corrugations 231, 231 protruding in the same direction as the corrugation 201 are formed, and corrugations 23b, 23b protruding in the same direction as the corrugation 20b are formed on the back surface. The ends of these corrugations 231 (23b) have intersecting slits 3
The contact portions are welded together.
なお、ストラップ３同士の交差部の端部は上記溶接タブ
４．５により溶接されている。Note that the ends of the intersections of the straps 3 are welded by the welding tabs 4.5.
しかして、上記構成の支持格子によれば以下に示すよう
な効果を奏する。According to the support grid having the above structure, the following effects can be achieved.
■ストラップ３の長手方向に互いに離間するコルゲーシ
ョン２０＊、２０ｂをそれらの端部が、交差するストラ
ップ３の表裏面に当接するように形成し、この当接部を
溶接したので、コルゲーション２０＊（２０ｂ）がスト
ラップ３の長手方向に連続して、ストラップ３の座屈強
度が向上し、この結果支持格子の機械的強度が向上する
。■The corrugations 20* and 20b, which are spaced apart from each other in the longitudinal direction of the strap 3, are formed so that their ends abut against the front and back surfaces of the intersecting strap 3, and these abutting parts are welded, so that the corrugations 20* ( 20b) is continuous in the longitudinal direction of the strap 3, increasing the buckling strength of the strap 3 and, as a result, increasing the mechanical strength of the support grid.
■ストラップ３に上記コルゲーション２０ｉ、２０ｂに
加えてコルゲーション２３ｓ、２３ｂ形成したので、さ
らに支持格子の機械的強度が向上する。(2) Since corrugations 23s and 23b are formed on the strap 3 in addition to the corrugations 20i and 20b, the mechanical strength of the support grid is further improved.
■コルゲーション２０ａ、２０ｂおよびコルゲーション
２３ｇ、２３ｂのそれぞれ端部とこれらに当接するスト
ラップ３の表裏面との当接部を溶接したので、従来に比
べ溶接箇所が多くなり、この結果支持格子の機械的強度
が向上する。■Since the ends of the corrugations 20a, 20b and the corrugations 23g, 23b are welded to the front and back surfaces of the strap 3 that contact them, there are more welding points than in the past, and as a result, the mechanical Strength is improved.
■互いに隣接するコルゲーション２０！、２０！および
２０ｂ、２０ｂのそれぞれの端部、さらには互いに隣接
するコルゲーション２３ｘ、２３ｘおよび２３ｂ、２３
ｂのそれぞれの端部を、交差するストラッグ３の表裏面
に当接させるようにしたので、これらコルゲーション２
０１，２０ｂ、２３！、２３ｂＩ−よりストラップ３の
位置決めをすることができ、したがって従来のビンプル
と呼ばれる突起６．６を形成する必要がない。■20 corrugations adjacent to each other! , 20! and the respective ends of 20b, 20b, as well as the corrugations 23x, 23x and 23b, 23 adjacent to each other.
Since each end of b is brought into contact with the front and back surfaces of the intersecting strugs 3, these corrugations 2
01, 20b, 23! , 23bI-, the strap 3 can be positioned, and therefore there is no need to form the conventional protrusion 6.6 called a bin pull.
■上記■に述べたように、ストラップ３同士の溶接箇所
が従来に比べ多くなるので、ストラップ３同士の交差部
の端部を溶接する溶接タブ４．５のボリュームを小さく
することができる。この結果、支持格子の冷却材の流路
断面積を大きくすることができ、よって、冷却材の圧力
損失を低減することができる。(2) As described in (2) above, since the number of welding points between the straps 3 is increased compared to the conventional case, the volume of the welding tab 4.5 that welds the ends of the intersections of the straps 3 can be reduced. As a result, the flow cross-sectional area of the coolant in the support grid can be increased, and therefore the pressure loss of the coolant can be reduced.
■コルゲーション２０ａ、２０ｂおよび２３ｓ、２３ｂ
を、ストラップ３の表裏面から突出させかつそれぞれの
端部が、交差するストラップ３の表裏面に当接するよう
に形成し、これら当接部を溶接したので、これら溶接部
が支持格子の平面視においてストラップ３同士の交差点
口りに均等に配置され、よって溶接強度の点においても
高い信頼性が得られる。■Corrugation 20a, 20b and 23s, 23b
are formed so that they protrude from the front and back surfaces of the strap 3 and their respective ends abut against the front and back surfaces of the intersecting straps 3, and these abutting portions are welded, so that these welded portions are visible in plan view of the support grid. The straps 3 are arranged evenly at the intersections of the straps 3, and therefore high reliability can be obtained in terms of welding strength.
「発明の効果」
以上説明したように、この発明の支持格子によれば以下
のような効果を奏する。"Effects of the Invention" As explained above, the support grid of the present invention provides the following effects.
■ストラップの長手方向に互いに離間する突条をそれら
の端部が、交差するストラップの表裏面に当接するよう
に形成し、この当接部を溶接したので、突条がストラッ
プの長手方向に連続して、ストランプの座屈強度が向上
し、この結果支持格子の機械的強度が向上する。■Protrusions that are spaced apart from each other in the longitudinal direction of the strap are formed so that their ends contact the front and back surfaces of the intersecting straps, and these abutting parts are welded, so that the protrusions are continuous in the longitudinal direction of the strap. As a result, the buckling strength of the strump is improved, and as a result, the mechanical strength of the support grid is improved.
■溶接タブによる溶接に加え、突条の端部とこれに当接
するストラップの表裏面との当接部を溶接したので、従
来に比べ溶接箇所が多くなり、この結果支持格子のｉｗ
的強度が向上する。■In addition to welding with welding tabs, we welded the contact areas between the ends of the protrusions and the front and back surfaces of the straps that contact them, so there are more welding points than before, and as a result, the support grid's iw
The target strength is improved.
■ストラップの表裏面に形成され、互いに隣接する突条
の端部を、交差するストラップの表裏面に当接させるよ
うにしたので、これら突条により支持格子を組み立てる
際のストラップの位置決めをすることができる。■The ends of adjacent protrusions formed on the front and back surfaces of the straps are brought into contact with the front and back surfaces of the intersecting straps, so these protrusions can be used to position the straps when assembling the support grid. Can be done.
■ストラップ同士の溶接箇所が従来に比べ多くなるので
、ストラップ同士の交差部の端部を溶接する溶接タブの
ボリュームを小さくすることができる。この結果、支持
格子の冷却材の流路断面積を大きくすることができ、よ
って、冷却材の圧力損失を低減することができる。■Since there are more welding points between straps than in the past, it is possible to reduce the volume of the welding tab that welds the ends of the intersections of straps. As a result, the flow cross-sectional area of the coolant in the support grid can be increased, and therefore the pressure loss of the coolant can be reduced.
■突条を、ストラップの表裏面から突出させかつそれぞ
れの端部が、交差するストラップの表裏面に当接するよ
うに形成し、これら当接部を溶接したので、これら溶接
部が支持格子の平面視においてストラップ同士の交差点
口りに均等に配置され、よって溶接強度の点においても
高い信頼性が得られる。■Protrusions were formed so that they protruded from the front and back surfaces of the straps, and their respective ends abutted on the front and back surfaces of the intersecting straps, and these contact areas were welded, so that these welded areas were in the plane of the support grid. When viewed from the outside, the straps are evenly arranged at the intersections of the straps, thus providing high reliability in terms of welding strength.
第１図ないし第４図はこの発明の一実施例を示すもので
あり、第１図は支持格子の要部を示す斜視図、第２図は
組立前のストラップの要部の側面図、第３図は組立後の
ストラップの要部の断面図、第４図は第３図におけるＩ
Ｖ−ＩＶ線線断断面図第５図および第６図は従来の支持
格子の第−例を示すものであり、第５図はストラップの
要部の側面図、＠６図は支持格子の要部の斜視図、第７
図は従来の支持格子の第二例を示す要部の平面図である
、１・・・・・・薄板、２−−−−−−スリット、３・
・・・・・ストラップ、
２０ｓ、２０ｂ・・・・・・コルゲーション（突Ｉ、）
、２３直、２３ｂ・・・・・・コルゲーション（突条）
、。1 to 4 show an embodiment of the present invention, in which FIG. 1 is a perspective view showing the main parts of the support grid, FIG. 2 is a side view of the main parts of the strap before assembly, and FIG. Figure 3 is a sectional view of the main parts of the strap after assembly, and Figure 4 is I in Figure 3.
5 and 6, which are cross-sectional views taken along the line V-IV, show the first example of a conventional support grid. Perspective view of section 7
The figure is a plan view of the main parts of a second example of a conventional support grid.
...Strap, 20s, 20b...Corrugation (Tab I,)
, 23 straight, 23b... Corrugation (projection)
,.
Claims (1)
する方向に切り込んでなるスリットが上記薄板の長手方
向に一定間隔毎に形成された多数のストラップを、上記
スリット同士を互いに嵌合することにより格子状に交差
させ、この交差部の端部を接合してなる支持格子におい
て、 上記スリット間以外の上記ストラップの表裏面に、上記
ストラップの長手方向に延びかつ上記表裏面から突出す
る突条を上記ストラップの長手方向に所定間隔を隔てて
形成し、これら突条の端部が、交差する上記ストラップ
の表裏面に当接すると共に、この当接部を溶接したこと
を特徴とする支持格子。[Scope of Claims] A large number of straps each having a plurality of slits formed by cutting a strip-shaped thin plate from one end thereof in a direction perpendicular to the longitudinal direction of the thin plate at regular intervals in the longitudinal direction of the thin plate, In a support lattice formed by fitting the slits into each other to intersect in a lattice shape and joining the ends of the intersections, a support lattice that extends in the longitudinal direction of the strap and that Protrusions projecting from the front and back surfaces of the strap are formed at predetermined intervals in the longitudinal direction of the strap, the ends of these protrusions abut against the intersecting front and back surfaces of the strap, and the abutting portions are welded. A support grid featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63070153A JPH067190B2 (en) | 1988-03-24 | 1988-03-24 | Support grid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63070153A JPH067190B2 (en) | 1988-03-24 | 1988-03-24 | Support grid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01242992A true JPH01242992A (en) | 1989-09-27 |
| JPH067190B2 JPH067190B2 (en) | 1994-01-26 |
Family
ID=13423347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63070153A Expired - Lifetime JPH067190B2 (en) | 1988-03-24 | 1988-03-24 | Support grid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH067190B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| US8238511B2 (en) * | 2009-06-09 | 2012-08-07 | Westinghouse Electric Company Llc | Nuclear fuel assembly protective bottom grid |
| US9953730B2 (en) | 2011-05-20 | 2018-04-24 | Areva Np | Strip for a nuclear fuel assembly spacer grid |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20140019924A (en) * | 2012-08-06 | 2014-02-18 | 한전원자력연료 주식회사 | Spacer grid of a nuclear fuel assembly to prevent flow-induced vibration |
-
1988
- 1988-03-24 JP JP63070153A patent/JPH067190B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| US8238511B2 (en) * | 2009-06-09 | 2012-08-07 | Westinghouse Electric Company Llc | Nuclear fuel assembly protective bottom grid |
| US9953730B2 (en) | 2011-05-20 | 2018-04-24 | Areva Np | Strip for a nuclear fuel assembly spacer grid |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH067190B2 (en) | 1994-01-26 |
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