JP3145085B2 - Spent fuel storage rack and manufacturing method thereof - Google Patents
Spent fuel storage rack and manufacturing method thereofInfo
- Publication number
- JP3145085B2 JP3145085B2 JP33237599A JP33237599A JP3145085B2 JP 3145085 B2 JP3145085 B2 JP 3145085B2 JP 33237599 A JP33237599 A JP 33237599A JP 33237599 A JP33237599 A JP 33237599A JP 3145085 B2 JP3145085 B2 JP 3145085B2
- Authority
- JP
- Japan
- Prior art keywords
- partition plate
- partition
- spent fuel
- partition plates
- storage rack
- 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)
- Hydrogen, Water And Hydrids (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、使用済燃料貯蔵ラ
ック及びその製造方法に係り、特に、燃料プール内に据
え付けるのに好適な使用済燃料貯蔵ラック及びその製造
方法に関する。The present invention relates to a spent fuel storage rack and a method of manufacturing the same, and more particularly, to a spent fuel storage rack suitable for being installed in a fuel pool and a method of manufacturing the same.
【０００２】[0002]
【従来の技術】従来の使用済燃料貯蔵ラックとしては、
特開昭55−1532号公報のような構造となっている。つま
り、図７ないし図９に示す様に複数個の角パイプ２３を
等間隔に並べてそれぞれの角パイプ２３間をスペーサ２
４にて連結しており、耐震性を向上させるために最外周
に存在する各角パイプ２３間の側面に補強部材２７また
は耐震用補強部材２５が溶接にて取付けられている。こ
の構造においては、角パイプ２３の間にはスペーサ２４
を設けて連結していることにより各燃料集合体相互間の
距離が大きいことからスペース効率をさげている。2. Description of the Related Art Conventional spent fuel storage racks include:
The structure is as shown in JP-A-55-1532. That is, as shown in FIGS. 7 to 9, a plurality of square pipes 23 are arranged at equal intervals, and
In order to improve the earthquake resistance, a reinforcing member 27 or an earthquake-resistant reinforcing member 25 is attached to a side surface between the square pipes 23 existing at the outermost periphery by welding. In this structure, a spacer 24 is provided between the square pipes 23.
The space efficiency is reduced because the distance between the fuel assemblies is large by providing and connecting the fuel assemblies.
【０００３】また、各燃料集合体相互間には２つの角パ
イプ２３の側壁が存在していることおよび耐震上から補
強部材２７を取付けることから使用済燃料貯蔵ラック自
体の重量が重くなり、建屋に対する荷重が大きいという
問題点があった。Further, since the two side walls of the square pipe 23 exist between the fuel assemblies and the reinforcing member 27 is attached from the viewpoint of earthquake resistance, the weight of the spent fuel storage rack itself becomes heavy, and the building However, there is a problem that the load is large.
【０００４】この問題点の解決方法として特開平1−280
296 号公報記載の技術がある。つまり図６に示すように
複数個の角筒体２１を市松模様に配置することにより前
記のスペーサ２４が不要となりスペース効率が上がり、
さらに各燃料集合体相互間は角筒体２１の側壁のみとな
り軽量化され、かつ、角筒体２１の長手方向に接合部材
２２を複数個溶接することにより耐震性も優れたものと
なる。As a method for solving this problem, Japanese Patent Laid-Open Publication No.
There is a technique described in Japanese Patent Publication No. 296. In other words, by arranging a plurality of rectangular cylinders 21 in a checkered pattern as shown in FIG.
Furthermore, the space between the fuel assemblies is reduced only by the side wall of the rectangular cylinder 21, and the earthquake resistance is improved by welding a plurality of joining members 22 in the longitudinal direction of the rectangular cylinder 21.
【０００５】また、特開平1−269091 号公報において
は、図８に示すように、平板状の横板３１と複数枚の帯
状縦板３２とを複数段にわたり交互に積層し格子状に形
成している。In Japanese Unexamined Patent Publication No. 1-26991, as shown in FIG. 8, a flat horizontal plate 31 and a plurality of band-shaped vertical plates 32 are alternately laminated in a plurality of stages to form a lattice. ing.
【０００６】これは、帯状縦板に形成された突起３３と
平板状横板に形成された溝３４とを組合わせており、さ
らに組合わせ部の両隅を脚長の短かい軽度の隅肉溶接３
５によって接着している。In this method, a projection 33 formed on a strip-shaped vertical plate and a groove 34 formed on a flat horizontal plate are combined, and both corners of the combined portion are lightly welded with short fillet length. 3
5 adhered.
【０００７】[0007]
【発明が解決しようとする課題】上記特開平1−280296
号公報では、市松模様に配列した角筒体２１の外壁面間
の距離２１ａが角筒体２１の内壁面間距離２１ｂと実質
的に等しくなるように配列する必要があり、隣接する角
筒体２１の双方のコーナ部分の曲率半径と接合部材２２
を使って両面間距離２１ａおよび２１ｂをおさえている
が、曲率半径部であることから両面間距離の精度を出す
ことが困難である。また、角筒体２１自体も精度よく製
作することが困難であることから寸法的に余裕をもった
少し大きめの角筒体２１にする必要がある。角筒体２１
の接合部材２２は長手方向に対して複数箇所設けている
が、コーナ部分の溶接にて耐震性を持たせることから隅
肉溶接の溶着金属量が多くなり、ラック自体の変形が増
加する。また、隣接する角筒体２１の双方のコーナ部分
の接合部材２２のない部分は、角筒体２１間に隙間が生
じ燃料集合体相互のしゃへい効果が低下する。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the publication, the distance 21a between the outer wall surfaces of the rectangular cylinders 21 arranged in a checkerboard pattern needs to be arranged so as to be substantially equal to the distance 21b between the inner wall surfaces of the rectangular cylinders 21. 21 and the radius of curvature of the two corner portions and the joining member 22
Is used to control the distances 21a and 21b between the two surfaces, but it is difficult to obtain the accuracy of the distance between the two surfaces because of the radius of curvature. In addition, since it is difficult to manufacture the rectangular cylinder 21 itself with high accuracy, it is necessary to make the rectangular cylinder 21 slightly larger with a margin in dimension. Square cylinder 21
Are provided at a plurality of positions in the longitudinal direction. However, since the corner portions are provided with earthquake resistance, the amount of welded metal in the fillet welding increases, and the deformation of the rack itself increases. In addition, at the corners of the adjacent square cylinders 21 where there is no joining member 22, a gap is formed between the square cylinders 21, and the shielding effect between the fuel assemblies is reduced.
【０００８】また、特開平1−269091 号公報では、突起
３３と溝３４との組合わせ寸法が非常に小さいため、耐
震性が弱く、かつ突起３３と溝３４の加工に時間がかか
る。In Japanese Patent Application Laid-Open No. 1-26991, since the combination of the projection 33 and the groove 34 is very small, the earthquake resistance is weak, and the processing of the projection 33 and the groove 34 takes time.
【０００９】本発明の目的は、溶接による変形を少なく
でき、かつ燃料プール内での使用済燃料集合体の貯蔵密
度を増加できる使用済燃料貯蔵ラック及びその製造方法
を提供することにある。An object of the present invention is to provide a spent fuel storage rack and a method of manufacturing the same, which can reduce deformation due to welding and can increase the storage density of spent fuel assemblies in a fuel pool.
【００１０】[0010]
【課題を解決するための手段】上記目的を達成する第１
発明の特徴は、仕切板を格子状に配置して構成され、前
記仕切板で囲まれかつそれぞれに１体の使用済燃料集合
体を収納する複数の空間が形成された使用済燃料貯蔵ラ
ックであって、 前記空間を複数配置できる幅を有し、貫通してなる複数
のスリットを有する複数の第１仕切板と、 １つの前記空間の幅を有して２つの前記第１仕切板間に
配置され、第1端面において長手方向に配置された複数
の第１突起部を有し、かつ前記第１端面とは別の第２端
面において長手方向に配置された複数の第２突起部を有
する複数の第２仕切板と、 前記第１突起部が前記第２仕切板の前記第１端面に対向
する一方の前記第１仕切板の前記スリットに挿入された
状態で、前記第２仕切板と前記一方の第１仕切板とを断
続的に接合した第１溶接部と、 前記第２突起部が前記第２仕切板の前記第２端面に対向
する他方の前記第１仕切板の前記スリットに挿入された
状態で、前記第２仕切板と前記他方の第１仕切板とを断
続的に接合した第２溶接部とを備えたことにある。A first aspect of the present invention for achieving the above object is as follows.
A feature of the present invention is a spent fuel storage rack which is configured by arranging partition plates in a lattice shape, and which is surrounded by the partition plates and has a plurality of spaces formed therein for accommodating one spent fuel assembly. And a plurality of first partition plates having a width capable of disposing a plurality of the spaces and having a plurality of slits penetrating therethrough, and having a width of one space between the two first partition plates. A plurality of first protrusions arranged in a longitudinal direction on a first end face, and a plurality of second protrusions arranged in a longitudinal direction on a second end face different from the first end face. A plurality of second partition plates, wherein the first projections are inserted into the slits of one of the first partition plates facing the first end surface of the second partition plate, A first welded portion intermittently joined to the one first partition plate; In a state where the portion is inserted into the slit of the other first partition plate facing the second end face of the second partition plate, the second partition plate and the other first partition plate are intermittently connected. And a second welded portion that has been joined.
【００１１】上記目的を達成する第２発明の特徴は、仕
切板を格子状に配置して構成され、前記仕切板で囲まれ
かつそれぞれに１体の使用済燃料集合体を収納する複数
の空間が形成された使用済燃料貯蔵ラックの製造方法で
あって、 前記空間を複数配置できる幅を有し、貫通してなる複数
のスリットを有する複数の第１仕切板を形成する工程
と、 １つの前記空間の幅を有し、一方の前記第１仕切板に対
向する第1端面において長手方向に配置された複数の第
１突起部を有し、かつ他方の前記第１仕切板に対向する
第２端面において長手方向に配置された複数の第２突起
部を有する複数の第２仕切板を形成する工程と、 各々の前記第２仕切板の前記第２突起部を、前記他方の
第１仕切板の前記スリット内に挿入する工程と、 前記第２突起部が前記他方の第１仕切板の前記スリット
内に挿入された状態で、前記各々の第２仕切板とその他
方の第１仕切板とを断続的に溶接する工程と、各々の前
記第２仕切板の前記第１突起部を、前記一方の第１仕切
板の前記スリット内に挿入する工程と、 前記第１突起部が前記一方の第１仕切板の前記スリット
内に挿入された状態で、前記各々の第２仕切板とその一
方の第１仕切板とを断続的に溶接する工程とを有するこ
とにある。A second feature of the present invention to achieve the above-mentioned object is that a plurality of spaces are formed by arranging partition plates in a grid pattern, and are surrounded by the partition plates and each store a single spent fuel assembly. Forming a plurality of first partition plates having a width capable of disposing a plurality of the spaces and having a plurality of slits formed therethrough; A second end having a width of the space, having a plurality of first protrusions arranged in a longitudinal direction on a first end face facing one of the first partition plates, and facing the other first partition plate; Forming a plurality of second partition plates having a plurality of second protrusion portions arranged in the longitudinal direction at two end surfaces; and forming the second protrusion portions of each of the second partition plates into the other first partition. The step of inserting into the slit of the plate, the second protrusion is A step of intermittently welding each of the second partition plates and the other first partition plate while being inserted into the slit of the other first partition plate, and a step of welding each of the second partition plates Inserting the first projections into the slits of the one first partition plate; and inserting the first projections into the slits of the one first partition plate, A step of intermittently welding each second partition plate and one of the first partition plates.
【００１２】第１発明は、第２仕切板の第１端面に設け
られた第１突起部を一方の第１仕切板のスリット内に挿
入し、第２仕切板の第２端面に設けられた第２突起部を
他方の第１仕切板のスリット内に挿入するので、各第１
仕切板に対する第２仕切板の位置決めが簡単にできる。
更に、各々の第２仕切板と他方の第１仕切板とを断続的
に溶接し、また、各々の第２仕切板と一方の第１仕切板
とを断続的に溶接するので、溶接による変形が少なくな
る。第２発明も、同様な効果を生じる。In the first invention, the first projection provided on the first end surface of the second partition plate is inserted into the slit of one of the first partition plates and provided on the second end surface of the second partition plate. Since the second protrusion is inserted into the slit of the other first partition plate,
The positioning of the second partition plate with respect to the partition plate can be easily performed.
Furthermore, since each second partition plate and the other first partition plate are intermittently welded, and each second partition plate and one of the first partition plates are intermittently welded, deformation due to welding is performed. Is reduced. The second invention produces the same effect.
【００１３】特に、第１及び第２突起部が第２仕切板の
長手方向に複数存在するので、長手方向における第２仕
切板の位置決めも簡単にできる。In particular, since a plurality of the first and second projections exist in the longitudinal direction of the second partition plate, the positioning of the second partition plate in the longitudinal direction can be easily performed.
【００１４】更に、第１発明は、第１突起部を一方の第
１仕切板のスリット内に挿入し、第２突起部を他方の第
１仕切板のスリット内に挿入するので、一方の第１仕切
板と他方の第１仕切板との間の寸法精度、及びこれらの
第１仕切板の位置決め精度が向上し、溶接による第２仕
切板の歪の発生を著しく抑制できる。また、各第１仕切
板と各第２仕切板が溶接一体構造であるため、従来必要
とされていた耐震用バンドが不要になる。これらのこと
から、燃料プール内での使用済燃料集合体の貯蔵密度が
著しく増加する。Further, in the first invention, the first projection is inserted into the slit of one first partition plate, and the second projection is inserted into the slit of the other first partition plate. The dimensional accuracy between one partition plate and the other first partition plate and the positioning accuracy of these first partition plates are improved, and the occurrence of distortion of the second partition plate due to welding can be significantly suppressed. In addition, since each of the first partition plates and each of the second partition plates have a welded integral structure, a conventionally required earthquake-resistant band is not required. For these reasons, the storage density of the spent fuel assemblies in the fuel pool is significantly increased.
【００１５】[0015]
【発明の実施の形態】本発明による一実施例である使用
済燃料貯蔵ラックを、図１乃至図５により説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS A spent fuel storage rack according to an embodiment of the present invention will be described with reference to FIGS.
【００１６】本実施例の使用済燃料貯蔵ラックは、複数
の長尺仕切板１及び複数の短尺仕切板２を有する。長尺
仕切板１と短尺仕切板２とは格子状に組合わされ、各仕
切板間の距離、すなわち長尺仕切板面間距離１３ａ，短
尺仕切板面間距離１３ｂが実質的に等しい。これは、長
尺仕切板１に設けられた切込み部（貫通孔）の間隔が短
尺仕切板２の幅と等しいからである。The spent fuel storage rack of this embodiment has a plurality of long partition plates 1 and a plurality of short partition plates 2. The long partition plate 1 and the short partition plate 2 are combined in a lattice pattern, and the distance between the partition plates, that is, the distance 13a between the long partition plates and the distance 13b between the short partition plates are substantially equal. This is because the interval between the cut portions (through holes) provided in the long partition plate 1 is equal to the width of the short partition plate 2.
【００１７】長尺仕切板１は、図２に示すように、長手
方向に複数の下部切込み部６及び複数の上部切込み部７
を有する。下部切込み部６及び上部切込み部７は、一列
に交互に形成される。短尺仕切板２は、図３に示すよう
に、一端面の長手方向に複数の下部凸部８を、他の端面
の長手方向に複数の上部凸部９を有している。As shown in FIG. 2, the long partition plate 1 has a plurality of lower cuts 6 and a plurality of upper cuts 7 in the longitudinal direction.
Having. The lower cuts 6 and the upper cuts 7 are alternately formed in a line. As shown in FIG. 3, the short partition plate 2 has a plurality of lower protrusions 8 in the longitudinal direction of one end surface and a plurality of upper protrusions 9 in the longitudinal direction of the other end surface.
【００１８】本実施例の使用済燃料貯蔵ラックの組立て
の途中段階を、図４に示している。水平方向に置かれた
長尺仕切板１の下部切込み部６に、短尺仕切板２の一端
面に設けられた下部凸部８を組込む。この状態で、長尺
仕切板１と短尺仕切板２は、それぞれの交点を上方から
の溶接によって施された下部溶着金属１０，１１にて一
体化されている。短尺仕切板２は、長尺仕切板１に対し
て垂直方向に立てられている。下部溶着金属１０，１１
は、長尺仕切板１及び短尺仕切板２の溶接変形を少なく
するために、短尺仕切板２の左右にそれぞれ断続的に、
特に千鳥形に配列される。１つの短尺仕切板２の長尺仕
切板１への溶接が終了した後、その短尺仕切板２と平行
に配置される別の短尺仕切板２の下部凸部８が長尺仕切
板１の他の下部切込み部６に組み込まれ、前述のように
長尺仕切板１と短尺仕切板２との交点での溶接が行われ
る。FIG. 4 shows an intermediate stage of assembling the spent fuel storage rack of this embodiment. The lower projection 8 provided on one end surface of the short partition plate 2 is incorporated into the lower cut portion 6 of the long partition plate 1 placed in the horizontal direction. In this state, the long partition plate 1 and the short partition plate 2 are integrated by the lower welding metals 10 and 11 in which the respective intersections are welded from above. The short partition plate 2 stands upright with respect to the long partition plate 1. Lower weld metal 10, 11
In order to reduce welding deformation of the long partition plate 1 and the short partition plate 2, the left and right of the short partition plate 2 are intermittently respectively.
In particular, they are arranged in a staggered pattern. After the welding of one short partition plate 2 to the long partition plate 1 is completed, the lower convex portion 8 of another short partition plate 2 arranged in parallel with the short partition plate 2 is connected to the other of the long partition plate 1. At the intersection of the long partition plate 1 and the short partition plate 2 as described above.
【００１９】一列に配置される短尺仕切板２の長尺仕切
板１への溶接が終了した後、これらの短尺仕切板２の複
数の上部凸部９が、これらの短尺仕切板２の上方に位置
される他の長尺仕切板１の複数の上部切込部７に組み込
まれる。短尺仕切板２の複数の上部凸部９は、他の長尺
仕切板１の上面よりの栓溶接によって施された上部溶着
金属１２にて他の長尺仕切板１と一体化されている。上
記の組立手順を下部側より順次上方に向かって施工する
ことにより、使用済燃料貯蔵ラックが組み立てられる。After the welding of the short partitions 2 arranged in a line to the long partitions 1 is completed, the plurality of upper projections 9 of these short partitions 2 are placed above these short partitions 2. It is incorporated into a plurality of upper cut portions 7 of another long partition plate 1 to be positioned. The plurality of upper convex portions 9 of the short partition plate 2 are integrated with the other long partition plate 1 by an upper weld metal 12 which is formed by plug welding from the upper surface of the other long partition plate 1. The spent fuel storage rack is assembled by sequentially performing the above assembling procedure upward from the lower side.
【００２０】最終的に、短尺仕切板２の凸部が、上記と
同様に、側部仕切板３及び底板４の切込部内に組み込ま
れ、短尺仕切板２が側部仕切板３及び底板４に溶接され
る。その後、ラックの支持脚５が底板４に溶接により取
付けられて使用済燃料貯蔵ラックが完成される。Finally, the projections of the short partition plate 2 are assembled into the cut portions of the side partition plate 3 and the bottom plate 4 in the same manner as described above, and the short partition plate 2 is connected to the side partition plate 3 and the bottom plate 4. To be welded. After that, the support legs 5 of the rack are attached to the bottom plate 4 by welding to complete the spent fuel storage rack.
【００２１】長尺仕切板１および短尺仕切板２の素材と
して中性子吸収材のボロンを含有されたステンレス鋼を
使用することによりさらにしゃへい効果をあげることが
できる。The use of stainless steel containing boron as a neutron absorbing material as a material of the long partition plate 1 and the short partition plate 2 can further enhance the shielding effect.
【００２２】本実施例の構造によれば、仕切板間距離す
なわち長尺仕切板面間距離１３ａおよび短尺仕切板面間
距離１３ｂは、長尺仕切板１に設けられた上・下部切込
み６，７と隣りの列の上・下部切込み６，７との間の距
離および短尺仕切板２の幅寸法により決定されるが、そ
のいずれも機械により加工が可能であり高精度にでき
る。さらに長尺仕切板１に設けられた上・下部切込み
６，７と短尺仕切板２に設けられた上・下部凸部９，８
がそれぞれ組合わされること、かつ下から順序よく組立
が可能でありすべての溶接が最も作業性の良好な下向溶
接ができることから溶接による歪を最少限にすることが
できる。According to the structure of this embodiment, the distance between the partition plates, that is, the distance 13a between the long partition plate surfaces and the distance 13b between the short partition plate surfaces are determined by the upper and lower cuts 6 provided on the long partition plate 1. It is determined by the distance between the upper and lower cuts 6 and 7 in the adjacent row and the width of the short partition plate 2, all of which can be machined and have high precision. Further, upper and lower cuts 6 and 7 provided on the long partition plate 1 and upper and lower convex portions 9 and 8 provided on the short partition plate 2.
Are combined with each other, and the assembling can be performed in order from the bottom, and since all welding can be performed with downward welding having the best workability, distortion due to welding can be minimized.
【００２３】長尺仕切板と短尺仕切板との取付けは、長
尺仕切板に設けられた切込み部に差し込まれた短尺仕切
板の凸部を栓溶接により行うが、差し込み部分が拘束さ
れていることより溶接による変形が押さえられる。さら
に栓溶接のため溶接の裏側からの空気の供給がしゃ断さ
れ、バックシールをしなくても、高品質の溶接を得るこ
とができる。Attachment of the long partition plate and the short partition plate is performed by plug welding of a convex portion of the short partition plate inserted into a cut portion provided on the long partition plate, but the inserted portion is restricted. As a result, deformation due to welding is suppressed. Further, the supply of air from the back side of the welding is cut off by plug welding, so that high-quality welding can be obtained without back sealing.
【００２４】また、構成部材がすべて板材であり製作時
の部品類の保管・組立スペースが少なくて作業ができ
る。Further, since all the constituent members are plate members, the space for storing and assembling parts at the time of manufacture is small, and work can be performed.
【００２５】本実施例の使用済燃料貯蔵ラックは、図５
に示すように自動溶接による製作が可能となる。FIG. 5 shows a spent fuel storage rack of this embodiment.
As shown in (1), production by automatic welding becomes possible.
【００２６】本実施例の使用済燃料貯蔵ラックは、構造
が、長尺仕切板１に設けられた切込み部６，７に差し込
まれた短尺仕切板２の凸部８，９を溶着金属１０，１
１，１２にて一体化しており差し込み部が拘束されてい
ることから耐震性に優れている。従って、従来の使用済
燃料貯蔵ラックが備えているような特別に耐震用のバン
ド及びサポート等の設置が不要となる。このことにより
使用済燃料貯蔵ラック自体の外形寸法が小さくでき、燃
料貯蔵プール全体スペースにおいて使用済燃料の貯蔵密
度を高めることができる。The spent fuel storage rack of this embodiment has a structure in which the projections 8 and 9 of the short partition plate 2 inserted into the cut portions 6 and 7 provided in the long partition plate 1 are welded to the metal 10, respectively. 1
It is excellent in earthquake resistance because it is integrated at 1 and 12 and the insertion part is restricted. Therefore, there is no need to install special seismic bands and supports, which are provided in the conventional spent fuel storage rack. As a result, the outer dimensions of the spent fuel storage rack itself can be reduced, and the storage density of the spent fuel can be increased in the entire space of the fuel storage pool.
【００２７】さらに、仕切板を格子状に組立てられてお
り仕切板間には隙間がないことから貯蔵燃料間が完全に
仕切られている状態となっている。これによりそれぞれ
の燃料間の放射能しゃへい効果が優れている。Further, the partition plates are assembled in a lattice shape, and there is no gap between the partition plates, so that the storage fuel is completely partitioned. Thereby, the radiation shielding effect between the respective fuels is excellent.
【００２８】使用済燃料貯蔵ラックは、原子炉建屋内に
設けられた冷却水が充満されている燃料貯蔵プール（図
示せず）内に据付けられ、隣合う長尺仕切り板１及び隣
合う短尺仕切り板２によって仕切られた空間内に使用済
燃料集合体を挿入し貯蔵している。隣接する使用済燃料
集合体相互間には、長尺仕切り板１及び短尺仕切り板２
（中性子しゃへい壁）、及び減速材である冷却水が存在
しているので、使用済燃料集合体の再臨界を防止でき
る。また、使用済燃料集合体相互間の距離を可能な限り
小さくしかつラック全体の外形寸法を小さくしスペース
効率を上げることにより燃料貯蔵プール内での燃料貯蔵
効率を上げることができる。更に、耐震用のバンドおよ
びサポート等の設置が不要となるので、使用済燃料貯蔵
ラックの重量を低減でき、原子炉建屋に対する荷重が低
減される。The spent fuel storage rack is installed in a fuel storage pool (not shown) provided in the reactor building and filled with cooling water, and an adjacent long partition plate 1 and an adjacent short partition are provided. Spent fuel assemblies are inserted and stored in the space partitioned by the plate 2. A long partition plate 1 and a short partition plate 2 are provided between adjacent spent fuel assemblies.
Since the (neutron shielding wall) and the cooling water as a moderator are present, re-criticality of the spent fuel assembly can be prevented. Further, the fuel storage efficiency in the fuel storage pool can be increased by minimizing the distance between the spent fuel assemblies and reducing the outer dimensions of the entire rack to increase the space efficiency. Further, since it is not necessary to install a seismic band and a support, the weight of the spent fuel storage rack can be reduced, and the load on the reactor building can be reduced.
【００２９】以上の如く、本実施例によれば、全体の貯
蔵密度をあげたうえ安価に高精度でかつ信頼性の高い使
用済燃料貯蔵ラックの製作ができる。更に、次のような
効果を達成できる。 （１）長尺仕切板１に設けられた上・下部切込み６，７
と短尺仕切板２に設けられた上・下部凸部９，８がそれ
ぞれ組合わされて組立てられるため仕切板間の寸法精度
が良く、さらに溶接による短尺仕切板２の歪の発生をお
さえることができる。 （２）組立溶接は下向き溶接が可能であり自動溶接化の
適用ができ高品質の製品が少ない工数で得られる。 （３）枠板を使用するため、製作時の部品類の保管・組
立スペースが少なくてよい。 （４）溶接一体構造であるため耐震性に優れている事か
ら耐震用バンドが不要となり、外形寸法を小さくするこ
とができ全体の貯蔵密度をあげることができる。 （５）燃料自体は個々に仕切板にて仕切られており、隣
接の燃料との間には隙間がなく放射能しゃへい効果が優
れている。 （６）特殊な製法となる角筒体の製作が不要となり単純
な板材の組立構造であり製作工数が少なくて製造でき
る。 （７）仕切板を等間隔に２枚平行に取りつけ２重構造と
し、その隙間に冷却水を保有することにより優れた放射
能しゃへい効果を得ることができる。As described above, according to this embodiment, a high-precision and highly reliable spent fuel storage rack can be manufactured inexpensively while increasing the overall storage density. Further, the following effects can be achieved. (1) Upper and lower cuts 6 and 7 provided in long partition plate 1
The upper and lower projections 9 and 8 provided on the short partition plate 2 are combined and assembled, so that the dimensional accuracy between the partition plates is good, and furthermore, the generation of distortion of the short partition plate 2 due to welding can be suppressed. . (2) Assembling welding can be performed by downward welding, automatic welding can be applied, and high-quality products can be obtained with a small number of man-hours. (3) Since a frame plate is used, a space for storing and assembling parts at the time of manufacturing may be small. (4) Since it has a single-piece welded structure, it has excellent seismic resistance, so that no seismic band is required, the external dimensions can be reduced, and the overall storage density can be increased. (5) The fuel itself is separated by a partition plate, and there is no gap between adjacent fuels, so that the radioactive shielding effect is excellent. (6) It is not necessary to manufacture a rectangular cylindrical body, which is a special manufacturing method, and it is a simple plate assembly structure, and can be manufactured with a small number of manufacturing steps. (7) An excellent radiation shielding effect can be obtained by installing two partition plates in parallel at equal intervals to form a double structure and holding cooling water in the gaps.
【００３０】本発明の他の実施例を図１１により説明す
る。本実施例は、長尺仕切板１及び短尺仕切板２，２′
をそれぞれ２枚隙間を設けて配置した構造としている。
長尺仕切板１間の冷却水保有空間２９および短尺仕切板
間の冷却水保有空間３０に冷却水を保有することにより
貯蔵された使用済燃料間の放射能しゃヘい効果をさらに
優れたものにすることができる。この２枚構造の仕切板
の組立ても前記と同様に下部切り込み６，上部切り込み
７および下部凸部８，上部凸部９を組合わせた上で製造
する。Another embodiment of the present invention will be described with reference to FIG. In this embodiment, the long partition plate 1 and the short partition plates 2, 2 '
Are arranged with two gaps between them.
The cooling water holding space 29 between the long partition plates 1 and the cooling water holding space 30 between the short partition plates 1 further retain the cooling water, thereby further improving the radiation shielding effect between the stored spent fuels. Can be Even in the case of assembling the partition plate having the two-sheet structure, the lower cut 6, the upper cut 7, the lower convex portion 8, and the upper convex portion 9 are assembled in the same manner as described above.
【００３１】[0031]
【発明の効果】第１発明及び第２発明によれば、溶接に
よる変形を少なくでき、かつ燃料プール内での使用済燃
料集合体の貯蔵密度を増加できる。According to the first and second aspects of the invention, deformation due to welding can be reduced, and the storage density of spent fuel assemblies in the fuel pool can be increased.
【図１】本発明の好適な一実施例である使用済燃料貯蔵
ラックの全体構成の斜視図である。FIG. 1 is a perspective view of the entire configuration of a spent fuel storage rack according to a preferred embodiment of the present invention.
【図２】図１に示す長尺仕切板の構成図である。FIG. 2 is a configuration diagram of a long partition plate shown in FIG.
【図３】図１に示す短尺仕切板の斜視図である。FIG. 3 is a perspective view of the short partition shown in FIG.
【図４】図１に示す仕切板の組立手順状態を示す説明図
である。FIG. 4 is an explanatory view showing an assembly procedure state of the partition plate shown in FIG. 1;
【図５】図１に示す使用済燃料貯蔵ラックの組立作業状
態の例を示す説明図である。FIG. 5 is an explanatory view showing an example of an assembly operation state of the spent fuel storage rack shown in FIG. 1;
【図６】従来の使用済燃料貯蔵ラックの部分平断面図で
ある。FIG. 6 is a partial plan sectional view of a conventional spent fuel storage rack.
【図７】従来の他の使用済燃料貯蔵ラックの部分平断面
図である。FIG. 7 is a partial plan sectional view of another conventional spent fuel storage rack.
【図８】従来の他の使用済燃料貯蔵ラックの部分平断面
図である。FIG. 8 is a partial plan sectional view of another conventional spent fuel storage rack.
【図９】従来の使用済燃料貯蔵ラックの実施例の全体斜
視図である。FIG. 9 is an overall perspective view of a conventional spent fuel storage rack according to an embodiment.
【図１０】従来の使用済燃料貯蔵ラックの実施例の全体
斜視図である。FIG. 10 is an overall perspective view of an embodiment of a conventional spent fuel storage rack.
【図１１】本発明における仕切板を２重構造とした他の
実施例である使用済燃料貯蔵ラックの斜視図である。FIG. 11 is a perspective view of a spent fuel storage rack according to another embodiment of the present invention in which the partition plate has a double structure.
１…長尺仕切板、２…短尺仕切板、２′…２重構造とし
た短尺仕切板、３…側部仕切板、４…底板、５…ラック
の支持脚、６…下部切込み、７…上部切込み、８…下部
凸部、９…上部凸部、１０…下部溶着金属、１１…下部
溶着金属、１２…上部溶着金属、１３ａ…長尺仕切板面
間距離、１３ｂ…短尺仕切板面間距離、１４…自動溶接
ロボット、１５…昇降装置、２１…角筒体、２１ａ…角
筒体の内壁面間距離、２１ｂ…角筒体の外壁面間距離、
２２…接合部材、２３…角パイプ、２４…スペーサ、２
５…耐震用補強部材、２６…ラックの支持脚、２７…補
強部材、２８…ラックの支持脚、２９…長尺仕切板間の
冷却水保有空間、３０…短尺仕切板間の冷却水保有空
間、３１…平板状横板、３２…帯状縦板、３３…帯状縦
板に形成された突起、３４…平板状横板に形成された
溝、３５…隅肉溶接部。DESCRIPTION OF SYMBOLS 1 ... Long partition plate, 2 ... Short partition plate, 2 '... Double-structured short partition plate, 3 ... Side partition plate, 4 ... Bottom plate, 5 ... Rack support leg, 6 ... Lower cut, 7 ... Upper notch, 8: Lower convex portion, 9: Upper convex portion, 10: Lower weld metal, 11: Lower weld metal, 12: Upper weld metal, 13a: Distance between long partition plates, 13b: Distance between short partition plates Distance, 14: Automatic welding robot, 15: Lifting device, 21: Square cylinder, 21a: Distance between inner wall surfaces of the square cylinder, 21b: Distance between outer wall surfaces of the square cylinder,
22 joining member, 23 square pipe, 24 spacer, 2
5: Reinforcement member for earthquake resistance, 26: Support leg of rack, 27: Reinforcement member, 28: Support leg of rack, 29: Cooling water holding space between long partition plates, 30: Cooling water holding space between short partition plates Reference numeral 31 denotes a flat horizontal plate, 32 denotes a vertical band plate, 33 denotes a projection formed on the vertical vertical plate, 34 denotes a groove formed on the horizontal horizontal plate, and 35 denotes a fillet weld.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 恩田 直人 茨城県日立市幸町三丁目１番１号 株式 会社 日立製作所 日立工場内 (72)発明者 小林 正宏 茨城県日立市幸町三丁目１番１号 株式 会社 日立製作所 日立工場内 (72)発明者 高山 建夫 茨城県日立市幸町三丁目２番２号 日立 ニュークリアエンジニアリング株式会社 内 (72)発明者 矢田 良夫 茨城県日立市幸町三丁目１番１号 株式 会社 日立製作所 日立工場内 (56)参考文献 特開 平５−80188（ＪＰ，Ａ) 特開 昭53−65597（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) G21C 19/07 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Naoto Onda 3-1-1, Sachimachi, Hitachi-City, Ibaraki Pref. Hitachi, Ltd. Inside the Hitachi Plant (72) Inventor Masahiro Kobayashi 3-1-1, Sachimachi, Hitachi-City, Ibaraki No. 1 Hitachi, Ltd. Hitachi Plant (72) Inventor Tateo Takayama 2-2-2, Kochi-cho, Hitachi-shi, Ibaraki Hitachi Nuclear Engineering Co., Ltd. (72) Inventor Yoshio Yada 3-chome, Kochi-cho, Hitachi, Ibaraki No. 1 Hitachi, Ltd. Hitachi Plant (56) References JP-A-5-80188 (JP, A) JP-A-53-65597 (JP, A) (58) Fields investigated (Int. Cl. 7) , DB name) G21C 19/07
Claims (5)
仕切板で囲まれかつそれぞれに１体の使用済燃料集合体
を収納する複数の空間が形成された使用済燃料貯蔵ラッ
クであって、 前記空間を複数配置できる幅を有し、貫通してなる複数
のスリットを有する複数の第１仕切板と、 １つの前記空間の幅を有して２つの前記第１仕切板間に
配置され、第1端面において長手方向に配置された複数
の第１突起部を有し、かつ前記第１端面とは別の第２端
面において長手方向に配置された複数の第２突起部を有
する複数の第２仕切板と、 前記第１突起部が前記第２仕切板の前記第１端面に対向
する一方の前記第１仕切板の前記スリットに挿入された
状態で、前記第２仕切板と前記一方の第１仕切板とを断
続的に接合した第１溶接部と、 前記第２突起部が前記第２仕切板の前記第２端面に対向
する他方の前記第１仕切板の前記スリットに挿入された
状態で、前記第２仕切板と前記他方の第１仕切板とを断
続的に接合した第２溶接部とを備え、 前記空間が、前記第１溶接部及び前記第２溶接部を含む
各前記第２仕切板間にそれぞれ形成されていることを特
徴とする使用済燃料貯蔵ラック。1. A spent fuel storage rack comprising partition plates arranged in a grid pattern, wherein a plurality of spaces are formed, each of which is surrounded by the partition plates and accommodates a single spent fuel assembly. And a plurality of first partition plates having a width capable of disposing a plurality of the spaces and having a plurality of slits penetrating therethrough, and having a width of one space between the two first partition plates. A plurality of first protrusions arranged in a longitudinal direction on a first end face, and a plurality of second protrusions arranged in a longitudinal direction on a second end face different from the first end face. A plurality of second partition plates, wherein the first projections are inserted into the slits of one of the first partition plates facing the first end surface of the second partition plate, A first welded portion intermittently joined to the one first partition plate; and the second protrusion Is intermittently joined to the second partition plate while the second partition plate is inserted into the slit of the other first partition plate facing the second end face of the second partition plate. A spent fuel storage rack, wherein the space is formed between each of the second partition plates including the first welded portion and the second welded portion.
含有するステンレス鋼で構成される請求項１の使用済燃
料貯蔵ラック。2. The spent fuel storage rack according to claim 1, wherein said first partition plate and said second partition plate are made of stainless steel containing boron.
さ方向に複数のスリットが配置された複数のスリット列
を有し、各前記スリット列は前記第１突起部が挿入され
る複数の第１スリット、及び前記第２突起部が挿入され
る複数の前記第２スリットを含んでいる請求項１または
請求項２の使用済燃料貯蔵ラック。3. The first partition plate has a plurality of slit rows in which a plurality of slits are arranged in a height direction of the fuel storage rack, and each of the slit rows is a plurality of slit rows into which the first protrusion is inserted. 3. The spent fuel storage rack according to claim 1, further comprising a first slit and a plurality of the second slits into which the second protrusions are inserted. 4.
仕切板で囲まれかつそれぞれに１体の使用済燃料集合体
を収納する複数の空間が形成された使用済燃料貯蔵ラッ
クの製造方法であって、 前記空間を複数配置できる幅を有し、貫通してなる複数
のスリットを有する複数の第１仕切板を形成する工程
と、 １つの前記空間の幅を有し、一方の前記第１仕切板に対
向する第1端面において長手方向に配置された複数の第
１突起部を有し、かつ他方の前記第１仕切板に対向する
第２端面において長手方向に配置された複数の第２突起
部を有する複数の第２仕切板を形成する工程と、 各々の前記第２仕切板の前記第２突起部を、前記他方の
第１仕切板の前記スリット内に挿入する工程と、 前記第２突起部が前記他方の第１仕切板の前記スリット
内に挿入された状態で、前記各々の第２仕切板とその他
方の第１仕切板とを断続的に溶接する工程と、各々の前
記第２仕切板の前記第１突起部を、前記一方の第１仕切
板の前記スリット内に挿入する工程と、 前記第１突起部が前記一方の第１仕切板の前記スリット
内に挿入された状態で、前記各々の第２仕切板とその一
方の第１仕切板とを断続的に溶接する工程とを有するこ
とを特徴とする使用済燃料貯蔵ラックの製造方法。4. A spent fuel storage rack comprising a plurality of partition plates arranged in a grid pattern, each of which is surrounded by said partition plate and has a plurality of spaces for accommodating a single spent fuel assembly. A manufacturing method, comprising: forming a plurality of first partition plates having a width capable of disposing a plurality of the spaces and having a plurality of slits penetrating; and having a width of one space; A plurality of first protrusions disposed longitudinally on a first end face facing the first partition plate, and a plurality of first protrusions disposed longitudinally on a second end face facing the other first partition plate; Forming a plurality of second partition plates having the second projections, and inserting the second projections of each of the second partition plates into the slits of the other first partition plate. The second projection is in the slit of the other first partition plate; In the inserted state, a step of intermittently welding each of the second partition plates and the other first partition plate, and connecting the first protrusions of each of the second partition plates to the one of the first partition plates. Inserting the first projection into the slit of one of the first partition plates, and inserting the first protrusion into the slit of the one first partition plate; And a step of intermittently welding the partition and the partition plate.
の溶接が、下向溶接である請求項４の使用済燃料貯蔵ラ
ックの製造方法。5. The method for manufacturing a spent fuel storage rack according to claim 4, wherein the welding of the second partition plate and the other first partition plate is downward welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33237599A JP3145085B2 (en) | 1999-11-24 | 1999-11-24 | Spent fuel storage rack and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33237599A JP3145085B2 (en) | 1999-11-24 | 1999-11-24 | Spent fuel storage rack and manufacturing method thereof |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3241693A Division JP3020675B2 (en) | 1991-09-20 | 1991-09-20 | Spent fuel storage rack and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000121782A JP2000121782A (en) | 2000-04-28 |
| JP3145085B2 true JP3145085B2 (en) | 2001-03-12 |
Family
ID=18254273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33237599A Expired - Lifetime JP3145085B2 (en) | 1999-11-24 | 1999-11-24 | Spent fuel storage rack and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3145085B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200488199Y1 (en) * | 2015-11-23 | 2018-12-26 | 씨제이제일제당 주식회사 | a container for packing kimchi |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010014681A (en) * | 2008-07-07 | 2010-01-21 | Toshiba Corp | Spent fuel storage rack and manufacturing method therefor |
-
1999
- 1999-11-24 JP JP33237599A patent/JP3145085B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200488199Y1 (en) * | 2015-11-23 | 2018-12-26 | 씨제이제일제당 주식회사 | a container for packing kimchi |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000121782A (en) | 2000-04-28 |
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