JPH0377960B2 - - Google Patents
Info
- Publication number
- JPH0377960B2 JPH0377960B2 JP59172664A JP17266484A JPH0377960B2 JP H0377960 B2 JPH0377960 B2 JP H0377960B2 JP 59172664 A JP59172664 A JP 59172664A JP 17266484 A JP17266484 A JP 17266484A JP H0377960 B2 JPH0377960 B2 JP H0377960B2
- Authority
- JP
- Japan
- Prior art keywords
- nuclear fuel
- hollow guide
- cylindrical housing
- upper nozzle
- fuel assembly
- 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
- 239000003758 nuclear fuel Substances 0.000 claims description 59
- 239000000446 fuel Substances 0.000 claims description 26
- 238000003780 insertion Methods 0.000 claims description 16
- 230000037431 insertion Effects 0.000 claims description 16
- 238000000605 extraction Methods 0.000 claims description 14
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 4
- 210000000078 claw Anatomy 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000005253 cladding Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- Monitoring And Testing Of Nuclear Reactors (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は核燃料集合体を分解・再組立てする核
燃料集合体の分解・再組立装置に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a nuclear fuel assembly disassembly/reassembly apparatus for disassembling and reassembling nuclear fuel assemblies.
（従来の技術）
第１５図に示すように加圧水型原子炉の核燃料
集合体１１は、多数の核燃料棒２と、同各核燃料
棒２を個別に受け入れる多数の開口をそれぞれに
設けた複数の支持格子４と、複数の制御棒用中空
案内管３と、多数の流れ孔を穿設した底部ノズル
５と、多数の流れ孔を穿設した上部ノズル１とを
有し、上記各支持格子４が上記各中空案内管３の
長手方向に間隔をおいて配設されるとともに同各
中空案内管３が同各支持格子４に挿通固定されて
同各中空案内管３が互いに平行に支持され、上記
各核燃料棒２が上記各支持格子２の各開口に挿通
されて弾性的に且つ互いに平行に支持され、上記
各中空案内管３の両端部が上記底部ノズル板５及
び上記上部ノズル板１の連絡孔に挿通溶接されて
いる。なお上記核燃料棒２は、燃料被覆管８と押
えばね９とペレツト１０とにより構成されてい
る。また６は計測管、７はノズルスプリング、１
８は上部ノズル１の底板、１９は下部ノズル５の
頂板である。前記核燃料棒２が破損若しくは損傷
した場合、これを核燃料集合体１１から抜取つ
て、修復したのち、再組立てする必要がある。そ
の場合、制御棒用中空案内管３の上端部または下
端部に挿入・溶接したねじ付スリーブ（図示せ
ず）を上部ノズル１の底板１８または下部ノズル
５の底板１９に設けた連絡孔に挿入し、固定用ね
じを同各ねじ付スリーブに螺合して、上部ノズル
１または下部ノズル５を中空案内管３の端部に着
脱自在に固定するようにしておけば、同各固定用
ねじを取外し、同上部ノズル１または同下部ノズ
ル５を中空案内管３の端部から取り除くことによ
り、核燃料棒２を核燃料集合体１１から抜取るこ
とができるし、逆の操作で再組立てすることがで
きる。(Prior Art) As shown in FIG. 15, a nuclear fuel assembly 11 of a pressurized water reactor includes a large number of nuclear fuel rods 2 and a plurality of supports each having a large number of openings for receiving each of the nuclear fuel rods 2 individually. Each support grid 4 has a grid 4, a plurality of hollow guide tubes 3 for control rods, a bottom nozzle 5 with a large number of flow holes, and an upper nozzle 1 with a large number of flow holes. The hollow guide tubes 3 are arranged at intervals in the longitudinal direction, and the hollow guide tubes 3 are inserted and fixed into the support grids 4 so that the hollow guide tubes 3 are supported parallel to each other. Each nuclear fuel rod 2 is inserted into each opening of each support grid 2 and supported elastically and parallel to each other, and both ends of each hollow guide tube 3 communicate with the bottom nozzle plate 5 and the top nozzle plate 1. It is inserted through the hole and welded. The nuclear fuel rod 2 is composed of a fuel cladding tube 8, a pressing spring 9, and a pellet 10. Also, 6 is a measurement tube, 7 is a nozzle spring, 1
8 is the bottom plate of the upper nozzle 1, and 19 is the top plate of the lower nozzle 5. When the nuclear fuel rod 2 is broken or damaged, it is necessary to remove it from the nuclear fuel assembly 11, repair it, and then reassemble it. In that case, insert a threaded sleeve (not shown) inserted and welded into the upper or lower end of the control rod hollow guide tube 3 into the communication hole provided in the bottom plate 18 of the upper nozzle 1 or the bottom plate 19 of the lower nozzle 5. However, if the fixing screws are screwed into the respective threaded sleeves to removably fix the upper nozzle 1 or the lower nozzle 5 to the end of the hollow guide tube 3, the fixing screws can be screwed into the respective threaded sleeves. By removing the upper nozzle 1 or the lower nozzle 5 from the end of the hollow guide tube 3, the nuclear fuel rod 2 can be extracted from the nuclear fuel assembly 11, and can be reassembled by performing the reverse operation. .
（発明が解決しようとする問題点）
前記核燃料集合体１１を原子炉内で使用したの
ちは、前記固定用ねじのねじ山等に変形、焼付、
カジリ等が発生し易くて、同固定用ねじを取外
し、上部ノズル１または下部ノズル５を中空案内
管３の端部から取除いて、核燃料棒２を核燃料集
合体１１から抜取るとき及び再組立てするとき
に、支障を来す。また固定用ねじによる取付けで
は、締付力の不均一により、ガタが発生するとい
う問題があつた。(Problems to be Solved by the Invention) After the nuclear fuel assembly 11 is used in a nuclear reactor, the screw threads of the fixing screws, etc. may be deformed, seized, or
Galling is likely to occur, so when removing the fixing screw, removing the upper nozzle 1 or the lower nozzle 5 from the end of the hollow guide tube 3, and removing the nuclear fuel rod 2 from the nuclear fuel assembly 11, or when reassembling it. It causes trouble when doing so. Furthermore, when mounting with fixing screws, there is a problem in that looseness occurs due to uneven tightening force.
（問題点を解決するための手段）
本発明は前記の問題点に対処するもので、多数
の核燃料棒と、同各核燃料棒を個別に受け入れる
多数の開口をそれぞれに設けた複数の支持格子
と、複数の制御棒用中空案内管と、多数の流れ孔
を穿設した底部ノズル板と、多数の流れ孔を穿設
した上部ノズル板とを有し、上記各支持格子が上
記各中空案内管の長手方向に間隔をおいて配設さ
れるとともに同各中空案内管が同各支持格子に挿
通固定されて同各中空案内管が互いに平行に支持
され、上記各核燃料棒が上記各支持格子の各開口
に挿通されて弾性的に且つ互いに平行に支持さ
れ、上記各中空案内管の両端部が上記底部ノズル
板及び上記上部ノズル板の連絡孔に挿通固定され
ている核燃料集合体を分解・再組立てする核燃料
集合体の分解・再組立装置において、前記核燃料
集合体を受け入れる筒状ハウジングと、同筒状ハ
ウジングの開口部に近接して同筒状ハウジングの
側部に出退自在に設けられた燃料集合体の上部固
定装置と、同筒状ハウジングの開口部に移動可能
に設けられた溶着部切除装置と、同筒状ハウジン
グの開口部に移動可能に設けられた燃料棒挿入・
引出装置と、同筒状ハウジングの開口部に設けら
れた上部ノズル板の保持装置と、同筒状ハウジン
グの開口部に移動可能に設けられた中空案内管膨
出結合装置とにより構成したことを特徴とする核
燃料集合体の分解・再組立装置に係り、その目的
とする処は、上部ノズルまたは下部ノズルを中空
案内管の端部に固定用ねじを使用して取付けると
きに生じていたねじ山等の変形、焼付、カジリ、
或いはガタを防止できる核燃料集合体の分解・再
組立装置を供する点にある。(Means for Solving the Problems) The present invention addresses the above-mentioned problems by providing a plurality of support grids each having a large number of nuclear fuel rods and a large number of openings for individually receiving each of the nuclear fuel rods. , having a plurality of hollow guide tubes for control rods, a bottom nozzle plate having a plurality of flow holes perforated therein, and an upper nozzle plate having a plurality of flow holes perforated therein; The hollow guide tubes are arranged at intervals in the longitudinal direction, and the hollow guide tubes are inserted and fixed into the support grids so that the hollow guide tubes are supported in parallel to each other, and the nuclear fuel rods are supported in parallel to each other in the support grids. The nuclear fuel assembly is inserted into each opening and supported elastically and parallel to each other, and both ends of each of the hollow guide tubes are inserted and fixed into the communication holes of the bottom nozzle plate and the top nozzle plate. In a disassembly/reassembly device for a nuclear fuel assembly to be assembled, a cylindrical housing for receiving the nuclear fuel assembly, and a cylindrical housing provided near an opening of the cylindrical housing on a side of the cylindrical housing so as to be movable in and out of the cylindrical housing. An upper fixing device for the fuel assembly, a weld part cutting device movably provided in the opening of the cylindrical housing, and a fuel rod insertion/removal device movably provided in the opening of the cylindrical housing.
A drawing device, an upper nozzle plate holding device provided at the opening of the cylindrical housing, and a hollow guide tube expansion coupling device movably provided at the opening of the cylindrical housing. This device is characterized by disassembly and reassembly of nuclear fuel assemblies, and its purpose is to remove the threads that occur when attaching the upper or lower nozzle to the end of the hollow guide tube using fixing screws. Deformation, seizure, galling, etc.
Another object of the present invention is to provide a nuclear fuel assembly disassembly/reassembly device that can prevent rattling.
（実施例）
次に本発明の核燃料集合体の分解・再組立装置
を第１図乃至第１４図に示す一実施例により説明
すると、第１図の１が上部ノズル、２が多数の核
燃料棒、３が複数の制御棒用案内管、４が複数の
支持格子、５が底部ノズル、１１が上記各部１〜
５を有する核燃料集合体、１０１が同核燃料集合
体１１を受け入れる筒状ハウジング、１２９が同
筒状ハウジング１０１の最上端部、１０２が同最
上端部１２９に連続して設けられた核燃料集合体
ガイド部、第１、２図の１０５が同ガイド部１０
２よりも下方に筒状ハウジング１０１の側部に取
付けられた支持格子４及び上部ノズル１の固定装
置用支持台、１０４が同支持台１０５上の前後左
右位置に配置された合計４台の駆動装置、１０６
が同各駆動装置１０４により前後進させられるロ
ツド、１０３が同各ロツド１０６の先端に取付け
られた支持格子及び上部ノズル支持片で、各駆動
装置１０４を一方向に駆動すると、各ロツド１０
６及び各支持片１０３が前進し、各支持片１０３
が上部ノズル１と最上部の支持格子４とその直下
の支持格子４とに当接して、これを固定するよう
に、また各駆動装置１０４を他方向に駆動する
と、各ロツド１０６及び支持片１０３が後退し、
各支持片１０３が上部ノズル１と最上部の支持格
子４とその直下の支持格子４とから離れて、これ
らを解放するようになつている。また第３図は、
上部ノズル１の位置計測装置を示しており、同上
部ノズル１の位置計測装置が、ダイヤルゲージ取
付台１５０と同取付台１５０に取付けられた電気
式ダイヤルゲージ１５１とダイヤルゲージロツド
１５４と上記筒状ケーシング１０１の最上端部１
２９に設けた位置決めピン穴１５３に嵌挿されて
上記取付台１５０及び電気式ダイヤルゲージ１５
１を所定の高さ位置（(h)参照）に保持する位置決
めピン１５２とにより構成されている。また第４
図の１０７が上部ノズル１の底板１８と制御棒用
中空案内管３との溶着部１２４を切除する（第５
図参照）ためのカツターで、同カツター１０７は
溶着部切除装置の駆動装置（図示せず）により回
転及び昇降が行なわれるようになつており、同駆
動装置が移動装置（図示せず）により上記筒状ハ
ウジング１０１の最上端部（開口部）１２９に移
動可能に支持されている。また第６図及び第７図
の１０８が燃料棒挿入・引出装置の駆動装置、１
０９が同駆動装置１０８に一体の支持部材で、同
駆動装置１０８及び同支持部材１０９も起動装置
（図示せず）により筒状ケーシング１０１の最上
端部１２９に移動可能に支持されている。また１
１１が同駆動装置１０８の駆動軸に接続した爪、
１１０が同爪１１１を取り囲んで上記支持部材１
０９に固定されたスリーブで、駆動装置１０８を
一方向に駆動すると、爪１１１が上昇し、それが
半径方向内方へ縮径して、核燃料棒２を掴むよう
に、また駆動装置１０８を他方向に駆動すると、
爪１１１が下降し、それが半径方向外方へ拡径し
て、核燃料棒２を離すようになつている。また第
７図は、上記第５、６図の核燃料棒挿入・引出装
置１２５の他の実施例で、この実施例の場合に
は、核燃料棒挿入・引出装置１２６が、スリーブ
１１２と押付棒１１３と保持用ゴム材１１４とに
より構成されている。また第９、１０、１１図
は、核燃料棒挿入・引出装置のうち、ダミー核燃
料棒１２３を核燃料集合体１１に挿入する際に互
いの座屈を防止するためにダミー核燃料棒１２３
をガイドする燃料棒挿入ガイド装置を示してお
り、同燃料棒挿入ガイド装置が、駆動装置１１５
と駆動軸１１６と同駆動装置１１６を介して矢印
方向に移動する二分割ガイド部材１１７とにより
構成され、同駆動装置１１５も筒状ケーシング１
０１の最上端部１２９に移動可能に支持されてい
る。また第１２、１３図は、上記筒状ハウジング
１０１の最上端部（開口部）１２９に設けられた
上部ノズル１の保持装置を示しており、同上部ノ
ズル１の保持装置が、上部ノズル１保持用ハウジ
ング１６０と同ハウジング１６０の底部に設けた
上部ノズル１の底板１８保持部１６５と同ハウジ
ング１６０の上端部に設けたフランジ１６６と前
記筒状ハウジング１０１の最上端部１２９に設け
た位置決めピン穴１５３に嵌挿されて上記ハウジ
ング１６０を所定の高さ位置（(h)参照）に保持す
る位置決めピン１６１，１６３とハウジング１６
０を位置決めピン１６１，１６３に締付け固定す
るナツト１６２，１６３とにより構成されてい
る。また第１４図は、制御棒用中空案内管３上端
部膨出装置１２８を示しており、同膨出装置１２
８が、駆動装置１１８と同駆動装置１１８に一体
のスペーサ１１９と同駆動装置１１８の駆動軸に
接続した押付棒１２０と同押付棒１２０の下端膨
出部と上記スペーサ１１９との間に介装された拡
管用ゴム材１２１とにより構成され、駆動装置１
１８を駆動して、押付棒１２０を上昇させると、
拡管用ゴム材１２１が圧縮されて、制御棒用中空
案内管３の上端部が上部ノズル１の底板１８の拡
管用溝１２２に喰い込んで、同中空案内管３の上
端部が同上部ノズル１の底板１８に固定されるよ
うになつている。なお上記駆動装置１１８も移動
装置（図示せず）により筒状ケーシング１０１の
最上端部１２９に移動可能に支持されている。(Embodiment) Next, the nuclear fuel assembly disassembly/reassembly apparatus of the present invention will be explained using an embodiment shown in FIGS. 1 to 14. In FIG. , 3 is a plurality of guide tubes for control rods, 4 is a plurality of support grids, 5 is a bottom nozzle, 11 is each of the above parts 1-
5, a cylindrical housing 101 that receives the nuclear fuel assembly 11, 129 the uppermost end of the cylindrical housing 101, and 102 a nuclear fuel assembly guide provided continuously to the uppermost end 129. 105 in Figures 1 and 2 is the same guide part 10.
The support grid 4 and the support stand for the fixing device of the upper nozzle 1, which are attached to the side of the cylindrical housing 101 below the support stand 105, are arranged in the front, back, left and right positions on the support stand 105, for a total of four drives. device, 106
103 is a support grid and an upper nozzle support piece attached to the tip of each rod 106. When each drive device 104 is driven in one direction, each rod 10
6 and each support piece 103 move forward, and each support piece 103
When each drive device 104 is driven in the other direction, each rod 106 and support piece 103 are brought into contact with and fixed to the upper nozzle 1, the uppermost support grid 4, and the support grid 4 immediately below it. has retreated,
Each support piece 103 separates from and releases the upper nozzle 1, the uppermost support grid 4, and the support grid 4 directly below it. Also, Figure 3 shows
The position measuring device of the upper nozzle 1 is shown, and the position measuring device of the upper nozzle 1 includes a dial gauge mount 150, an electric dial gauge 151 attached to the mount 150, a dial gauge rod 154, and the tube. Uppermost end 1 of shaped casing 101
The mounting base 150 and the electric dial gauge 15 are fitted into the positioning pin holes 153 provided in the 29.
1 at a predetermined height position (see (h)). Also the fourth
107 in the figure cuts out the welded part 124 between the bottom plate 18 of the upper nozzle 1 and the control rod hollow guide tube 3 (the fifth
The cutter 107 is rotated and moved up and down by a drive device (not shown) of a welded part cutting device, and the drive device is driven by a moving device (not shown) to It is movably supported at the uppermost end (opening) 129 of the cylindrical housing 101 . 108 in FIGS. 6 and 7 is a drive device for the fuel rod insertion/extraction device;
Reference numeral 09 denotes a support member integrated with the drive device 108, and the drive device 108 and the support member 109 are also movably supported at the uppermost end 129 of the cylindrical casing 101 by a starting device (not shown). Also 1
11 is a claw connected to the drive shaft of the drive device 108;
110 surrounds the claw 111 and supports the support member 1.
When the drive device 108 is driven in one direction with the sleeve fixed to the sleeve 09, the pawl 111 rises and contracts radially inward to grip the nuclear fuel rod 2 and move the drive device 108 in the other direction. When driven in the direction,
The pawl 111 is lowered and expands radially outward to release the nuclear fuel rods 2. FIG. 7 shows another embodiment of the nuclear fuel rod insertion/extraction device 125 shown in FIGS. and a holding rubber material 114. Further, FIGS. 9, 10, and 11 show dummy nuclear fuel rods 123 in the nuclear fuel rod insertion/extraction device to prevent mutual buckling when inserting the dummy nuclear fuel rods 123 into the nuclear fuel assembly 11.
This figure shows a fuel rod insertion guide device that guides the drive device 115.
, a drive shaft 116 , and a two-part guide member 117 that moves in the direction of the arrow via the drive device 116 .
It is movably supported at the uppermost end 129 of 01. 12 and 13 show a holding device for the upper nozzle 1 provided at the uppermost end (opening) 129 of the cylindrical housing 101. housing 160, a holding part 165 for the bottom plate 18 of the upper nozzle 1 provided at the bottom of the housing 160, a flange 166 provided at the upper end of the housing 160, and a positioning pin hole provided at the uppermost end 129 of the cylindrical housing 101. Positioning pins 161 and 163 that are fitted into the housing 153 to hold the housing 160 at a predetermined height position (see (h)) and the housing 16
0 to positioning pins 161, 163. FIG. 14 also shows the upper end expansion device 128 of the control rod hollow guide tube 3.
8 is a drive device 118, a spacer 119 integrated with the drive device 118, a pressing rod 120 connected to the drive shaft of the driving device 118, and a bulging portion at the lower end of the pressing rod 120 interposed between the spacer 119. The drive device 1
18 to raise the pressing rod 120,
The tube expansion rubber material 121 is compressed, and the upper end of the control rod hollow guide tube 3 bites into the tube expansion groove 122 of the bottom plate 18 of the upper nozzle 1, and the upper end of the hollow guide tube 3 is inserted into the upper nozzle 1. It is designed to be fixed to the bottom plate 18 of. Note that the driving device 118 is also movably supported at the uppermost end 129 of the cylindrical casing 101 by a moving device (not shown).
（作用）
次に前記核燃料集合体の分解・再組立装置の作
用を説明する。第１図に示すように核燃料集合体
１１を筒状ケーシング１０１に挿入したのち、支
持格子及び上部ノズルの固定装置の各駆動装置１
０４を駆動し、各ロツド１０６及び各支持格子及
び上部ノズル支持片１０３を前進させ、各支持格
子支持片１０３を核燃料集合体１１の上部ノズル
１と最上部及びその直下の各支持格子４，４に当
接させて、核燃料集合体１１を支持するとともに
上記各支持格子４，４の直上にある上部ノズル１
の位置決めを行なう。このとき、核燃料集合体１
１の底部は、ピン（図示せず）等により筒状ケー
シング１０１の底部に位置決めされている。次い
で第３図に示すように上部ノズル１の位置計測装
置により、上部ノズル１の高さ位置を計測し、上
部ノズル１の取付状況についての情報を収集す
る。即ち、第３図に示すように位置決めピン１５
２を筒状ケーシング１０１の最上端部１２９に設
けられたピン穴１５３に挿入する。このときの位
置決めピン１５２の高さは(h)であるので、筒状ハ
ウジング１０１に設けた基準点から上部ノズル１
の頂部までの高さは(a)であることが判る。この場
合、上部ノズル１の高さは（Ｓ）である。次いで
第４図に示すように、制御棒中空案内管３と上部
ノズル１の底板１８との溶接部１２４をカツター
１０７により、第５図のように切除し、全ての溶
接部１２４を切除した後、上部ノズル１を取外
す。次いで第６図または第８図に示す燃料棒挿
入・引出装置を損傷した核燃料棒の位置に、移動
装置（図示せず）により移動し、駆動装置１０８
を駆動して、爪１１０により損傷した核燃料棒２
の上端を掴み、次いで筒状ハウジング１０１を下
方に移動させるか、上記挿入・引出装置１２５ま
たは１２６を上方に移動させて、損傷した核燃料
棒２を取り出す。次いでダミー燃料棒１２３を上
記燃料棒挿入・引出装置１２５または１２６に取
付け、適当な位置に第９、１０図のガイド部材１
１７を取付け、次いで引抜の場合と逆方向に筒状
ケーシング１０１または燃料棒挿入・引出装置１
２５または１２６を移動させて、ダミー燃料棒１
２３を挿入する。なお第１１図に示すようにダミ
ー燃料棒１２３の先端を円錐形状にしておくと、
支持格子４への挿入を容易に行なうことができ
る。次いで、第１２、１３図の上部ノズル保持装
置により、上部ノズル１を燃料集合体１１の上部
位置に復帰させる。第１３図に示した位置決めピ
ン１６１，１６３の高さ（h1）（h2）及び筒状ハ
ウジング１０１の最上部から上部ノズルの上面ま
で高さ（α1）（α2）は、第３図に示したノズル位
置計測装置が測定した測定結果であるピンの高さ
(h)及び筒状ハウジング１０１の基準点から上部ノ
ズル１の頂部までの高さ（α）により調整されて
いる。この場合、上部ノズル１の高さは（Ｓ）で
ある。上部ノズル１をノズル保持部１６５の上に
乗せて、ノズル保持装置を下方に移動させて行く
と、支持片１０３及びノズルガイド部にまず接触
して、適正な位置修正が行なわれる。その結果、
制御棒用中空案内管３が上部ノズル１の底板１８
のテーパにそつて取付穴に入る。この状態で、位
置決めピン１６１，１６３をピン穴１５３に入れ
て、上部ノズル１を取り外す。以上で上部ノズル
１は最適な状態に復帰する。位置決めピン１６
１，１６３の長さは必ずしも等しくはない。また
ノズル保持装置を先に取付調整した後、上部ノズ
ル１を挿入しても同様の結果を得られる。以上に
より、上部ノズル１が核燃料集合体１１の上部位
置に復帰するが、この状態になると、中空案内管
膨出結合装置１２８を制御棒用中空案内管３位置
に移動させる。上部ノズル１の底板１８には、拡
管用溝１２２が切つてあり、膨出結合装置１２８
の先端を制御棒用中空案内管３に挿入すると、ス
ペーサー１１９により、拡管用ゴム１２１が、拡
管用溝１２２に対応する。拡管は、押付棒１２０
を駆動装置１１８により引上げることにより、行
なわれる。拡管後の状態は、第４図に示すとおり
である。拡管により、上部ノズル１が、燃料集合
体１１に取付けられる。一方、破損した核燃料棒
２は、ダミー燃料棒１２３と取換えられて、補修
が完了する。その後、支持片１０３及びノズルガ
イドを外して、燃料集合体１１を取出す。またノ
ズル保持装置は、２分割して取り外すことができ
る。(Function) Next, the function of the nuclear fuel assembly disassembly/reassembly device will be explained. After inserting the nuclear fuel assembly 11 into the cylindrical casing 101 as shown in FIG.
04 to advance each rod 106, each support grid, and the upper nozzle support piece 103, and move each support grid support piece 103 to the upper nozzle 1 of the nuclear fuel assembly 11, the uppermost part, and each support grid 4, 4 immediately below it. The upper nozzle 1 supports the nuclear fuel assembly 11 in contact with the upper nozzle 1 and is located directly above each of the support grids 4, 4.
Perform positioning. At this time, nuclear fuel assembly 1
1 is positioned at the bottom of the cylindrical casing 101 by a pin (not shown) or the like. Next, as shown in FIG. 3, the height position of the upper nozzle 1 is measured by the position measuring device for the upper nozzle 1, and information about the installation status of the upper nozzle 1 is collected. That is, as shown in FIG.
2 into the pin hole 153 provided in the uppermost end 129 of the cylindrical casing 101. Since the height of the positioning pin 152 at this time is (h), the upper nozzle 1 is
It can be seen that the height to the top of is (a). In this case, the height of the upper nozzle 1 is (S). Next, as shown in FIG. 4, the welded portion 124 between the control rod hollow guide tube 3 and the bottom plate 18 of the upper nozzle 1 is cut out using a cutter 107 as shown in FIG. 5, and after cutting out all the welded portions 124. , remove the upper nozzle 1. Next, the fuel rod insertion/extraction device shown in FIG. 6 or FIG. 8 is moved to the position of the damaged nuclear fuel rod by a moving device (not shown), and the driving device 108
The nuclear fuel rod 2 damaged by the claw 110
Then, the cylindrical housing 101 is moved downward or the insertion/extraction device 125 or 126 is moved upward to remove the damaged nuclear fuel rod 2. Next, the dummy fuel rod 123 is attached to the fuel rod insertion/extraction device 125 or 126, and the guide member 1 shown in FIGS. 9 and 10 is attached to the appropriate position.
17, and then insert the cylindrical casing 101 or the fuel rod insertion/extraction device 1 in the opposite direction to the case of extraction.
25 or 126 to move the dummy fuel rod 1.
Insert 23. Note that if the tip of the dummy fuel rod 123 is made into a conical shape as shown in FIG.
It can be easily inserted into the support grid 4. Next, the upper nozzle 1 is returned to the upper position of the fuel assembly 11 using the upper nozzle holding device shown in FIGS. The heights (h 1 ) (h 2 ) of the positioning pins 161 and 163 and the heights (α 1 ) (α 2 ) from the top of the cylindrical housing 101 to the upper surface of the upper nozzle shown in FIG. The height of the pin, which is the measurement result of the nozzle position measuring device shown in the figure.
(h) and the height (α) from the reference point of the cylindrical housing 101 to the top of the upper nozzle 1. In this case, the height of the upper nozzle 1 is (S). When the upper nozzle 1 is placed on the nozzle holding portion 165 and the nozzle holding device is moved downward, it first comes into contact with the support piece 103 and the nozzle guide portion, and proper position correction is performed. the result,
The control rod hollow guide tube 3 is connected to the bottom plate 18 of the upper nozzle 1.
Insert into the mounting hole along the taper. In this state, positioning pins 161 and 163 are inserted into pin holes 153, and upper nozzle 1 is removed. With the above steps, the upper nozzle 1 returns to its optimal state. Positioning pin 16
The lengths of 1,163 are not necessarily equal. Moreover, the same result can be obtained even if the upper nozzle 1 is inserted after the nozzle holding device is installed and adjusted first. As a result of the above, the upper nozzle 1 returns to the upper position of the nuclear fuel assembly 11, and in this state, the hollow guide tube expansion coupling device 128 is moved to the control rod hollow guide tube 3 position. A tube expansion groove 122 is cut in the bottom plate 18 of the upper nozzle 1, and an expansion coupling device 128 is formed.
When the tip of the control rod is inserted into the control rod hollow guide tube 3, the spacer 119 causes the tube expansion rubber 121 to correspond to the tube expansion groove 122. To expand the tube, use the pressing rod 120
This is done by pulling up using the drive device 118. The state after expansion is as shown in FIG. The upper nozzle 1 is attached to the fuel assembly 11 by pipe expansion. Meanwhile, the damaged nuclear fuel rod 2 is replaced with a dummy fuel rod 123, and the repair is completed. After that, the support piece 103 and the nozzle guide are removed, and the fuel assembly 11 is taken out. Further, the nozzle holding device can be separated into two parts and removed.
（発明の効果）
本発明は前記のように多数の核燃料棒と、同各
核燃料棒を個別に受け入れる多数の開口をそれぞ
れに設けた複数の支持格子と、複数の制御棒用中
空案内管と、多数の流れ孔を穿設した底部ノズル
板と、多数の流れ孔を穿設した上部ノズル板とを
有し、上記各支持格子が上記各中空案内管の長手
方向に間隔をおいて配設されるとともに同各中空
案内管が同各支持格子に挿通固定されて同各中空
案内管が互いに平行に支持され、上記各核燃料棒
が上記各支持格子の各開口に挿通されて弾性的に
且つ互いに平行に支持され、上記各中空案内管の
両端部が上記底部ノズル板及び上記上部ノズル板
の連絡孔に挿通固定されている核燃料集合体を分
解・再組立てする核燃料集合体の分解・再組立装
置において、前記核燃料集合体を受け入れる筒状
ハウジングと、同筒状ハウジングの開口部に近接
して同筒状ハウジングの側部に出退自在に設けら
れた燃料集合体の上部固定装置と、同筒状ハウジ
ングの開口部に移動可能に設けられた溶着部切除
装置と、同筒状ハウジングの開口部に移動可能に
設けられた燃料棒挿入・引出装置と、同筒状ハウ
ジングの開口部に設けられた上部ノズル板の保持
装置と、同筒状ハウジングの開口部に移動可能に
設けられた中空案内管膨出結合装置とにより構成
していて、前記の作用が行なわれるので、上部ノ
ズル（または下部ノズル）を中空案内管の端部に
固定用ねじを使用して取付けるときに生じていた
ねじ山等の変形、焼付、カジリ、或いは締付力の
不均一に基づくガタを防止できる効果がある。(Effects of the Invention) As described above, the present invention includes a large number of nuclear fuel rods, a plurality of support grids each having a large number of openings for individually receiving each of the nuclear fuel rods, and a plurality of hollow guide tubes for control rods. It has a bottom nozzle plate having a plurality of flow holes formed therein, and an upper nozzle plate having a plurality of flow holes formed therein, and each of the support grids is arranged at intervals in the longitudinal direction of each of the hollow guide tubes. At the same time, the hollow guide tubes are inserted and fixed into the support grids so that the hollow guide tubes are supported parallel to each other, and the nuclear fuel rods are inserted into the openings of the support grids so that they are elastically and mutually supported. A nuclear fuel assembly disassembly and reassembly device for disassembling and reassembling a nuclear fuel assembly that is supported in parallel and in which both ends of each of the hollow guide tubes are inserted and fixed into communication holes of the bottom nozzle plate and the upper nozzle plate. , a cylindrical housing for receiving the nuclear fuel assembly; an upper fixing device for the fuel assembly provided on a side of the cylindrical housing so as to be movable in and out of the cylindrical housing near the opening of the cylindrical housing; A weld part cutting device movably provided in the opening of the cylindrical housing; a fuel rod insertion/extraction device movably provided in the opening of the cylindrical housing; It consists of a holding device for the upper nozzle plate, and a hollow guide tube expansion coupling device movably provided in the opening of the cylindrical housing. This has the effect of preventing deformation, seizure, galling of the threads, etc., which occurs when the nozzle is attached to the end of the hollow guide tube using a fixing screw, or looseness due to uneven tightening force.
第１図は本発明に係る核燃料集合体の分解・再
組立装置の一実施例を示す縦断側面図、第２図は
第１図の矢視−線に沿う支持格子固定装置の
横断平面図、第３図は上部ノズルの位置計測装置
を示す縦断側面図、第４図は溶着部切除装置の縦
断側面図、第５図は溶着部切除後の状態を示す縦
断側面図、第６図は燃料棒挿入・引出装置の１例
を示す縦断側面図、第７図は第６図の矢視−
線に沿う横断平面図、第８図は燃料棒挿入・引出
装置の他の例を示す縦断側面図、第９図は燃料棒
挿入・引出装置の一部である燃料棒挿入ガイド装
置を示す側面図、第１０図はその平面図、第１１
図はダミー燃料棒と支持格子との関係を示す側面
図、第１２図は上部ノズル板の保持装置を示す平
面図、第１３図はその縦断側面図、第１４図は中
空案内管膨出結合装置を示す縦断側面図、第１５
図は核燃料集合体を示す斜視図である。
１……上部ノズル、２……核燃料棒、３……制
御棒用中空案内管、４……支持格子、５……下部
ノズル、１１……核燃料集合体、１８……上部ノ
ズル１の底板、１９……下部ノズル５の頂板、１
０１……筒状ケーシング、１２９……筒状ケーシ
ング１０１の開口部、１０３，１０４，１０６…
…燃料集合体上部固定装置、１２５または１２６
……燃料棒挿入・引出装置、１２８……中空案内
管膨出結合膨出装置。
FIG. 1 is a vertical cross-sectional side view showing an embodiment of the nuclear fuel assembly disassembly/reassembly device according to the present invention, FIG. 2 is a cross-sectional plan view of the support grid fixing device along the arrow line in FIG. 1, Fig. 3 is a longitudinal side view showing the position measuring device for the upper nozzle, Fig. 4 is a longitudinal side view of the weld part cutting device, Fig. 5 is a longitudinal side view showing the state after the weld part has been removed, and Fig. 6 is the fuel A vertical sectional side view showing an example of a rod insertion/extraction device, FIG. 7 is taken in the direction of the arrow in FIG.
8 is a longitudinal sectional side view showing another example of the fuel rod insertion/extraction device, and FIG. 9 is a side view showing a fuel rod insertion guide device that is part of the fuel rod insertion/extraction device. Fig. 10 is the plan view, Fig. 11
Figure 12 is a side view showing the relationship between the dummy fuel rod and the support grid, Figure 12 is a plan view showing the upper nozzle plate holding device, Figure 13 is its vertical side view, and Figure 14 is the hollow guide tube bulging joint. Vertical side view showing the device, No. 15
The figure is a perspective view showing a nuclear fuel assembly. DESCRIPTION OF SYMBOLS 1... Upper nozzle, 2... Nuclear fuel rod, 3... Hollow guide tube for control rods, 4... Support grid, 5... Lower nozzle, 11... Nuclear fuel assembly, 18... Bottom plate of upper nozzle 1, 19...Top plate of lower nozzle 5, 1
01...Tubular casing, 129...Opening of tubular casing 101, 103, 104, 106...
...Fuel assembly upper fixing device, 125 or 126
...Fuel rod insertion/extraction device, 128...Hollow guide tube expansion coupling expansion device.
Claims (1)
け入れる多数の開口をそれぞれに設けた複数の支
持格子と、複数の制御棒用中空案内管と、多数の
流れ孔を穿設した底部ノズル板と、多数の流れ孔
を穿設した上部ノズル板とを有し、上記各支持格
子が上記各中空案内管の長手方向に間隔をおいて
配設されるとともに同各中空案内管が同各支持格
子に挿通固定されて同各中空案内管が互いに平行
に支持され、上記各核燃料棒が上記各支持格子の
各開口に挿通されて弾性的に且つ互いに平行に支
持され、上記各中空案内管の両端部が上記底部ノ
ズル板及び上記上部ノズル板の連絡孔に挿通固定
されている核燃料集合体を分解・再組立てする核
燃料集合体の分解・再組立装置において、前記核
燃料集合体を受け入れる筒状ハウジングと、同筒
状ハウジンウの開口部に近接して同筒状ハウジン
グの側部に出退自在に設けられた燃料集合体の上
部固定装置と、同筒状ハウジングの開口部に移動
可能に設けられた溶着部切除装置と、同筒状ハウ
ジングの開口部に移動可能に設けられた燃料棒挿
入・引出装置と、同筒状ハウジングの開口部に設
けられた上部ノズル板の保持装置と、同筒状ハウ
ジングの開口部に移動可能に設けられた中空案内
管膨出結合装置とにより構成したことを特徴とす
る核燃料集合体の分解・再組立装置。1. A plurality of nuclear fuel rods, a plurality of support grids each having a plurality of openings for individually receiving each nuclear fuel rod, a plurality of hollow guide tubes for control rods, and a bottom nozzle plate having a plurality of flow holes. and an upper nozzle plate having a plurality of flow holes, each of the support grids being arranged at intervals in the longitudinal direction of each of the hollow guide tubes, and each of the hollow guide tubes having the same support grid. The hollow guide tubes are inserted and fixed into the grid and supported in parallel to each other, the nuclear fuel rods are inserted through the openings of the support grid and supported elastically and parallel to each other, and the hollow guide tubes are A cylindrical housing for receiving the nuclear fuel assembly in a nuclear fuel assembly disassembly/reassembly apparatus for disassembling and reassembling a nuclear fuel assembly whose both ends are inserted and fixed into communication holes of the bottom nozzle plate and the upper nozzle plate. an upper fixing device for the fuel assembly, which is movably provided on the side of the cylindrical housing in proximity to the opening of the cylindrical housing; a fuel rod insertion/extraction device movably provided in the opening of the cylindrical housing; a holding device for the upper nozzle plate provided in the opening of the cylindrical housing; 1. A disassembly/reassembly device for a nuclear fuel assembly, comprising a hollow guide tube bulging coupling device movably provided in an opening of a shaped housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59172664A JPS6150098A (en) | 1984-08-20 | 1984-08-20 | Overhaul and re-assembly device for nuclear fuel aggregate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59172664A JPS6150098A (en) | 1984-08-20 | 1984-08-20 | Overhaul and re-assembly device for nuclear fuel aggregate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6150098A JPS6150098A (en) | 1986-03-12 |
| JPH0377960B2 true JPH0377960B2 (en) | 1991-12-12 |
Family
ID=15946081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59172664A Granted JPS6150098A (en) | 1984-08-20 | 1984-08-20 | Overhaul and re-assembly device for nuclear fuel aggregate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6150098A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5630229A (en) * | 1995-10-17 | 1997-05-20 | Billy International, Ltd. | Zipperless wetsuit |
-
1984
- 1984-08-20 JP JP59172664A patent/JPS6150098A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6150098A (en) | 1986-03-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR0168623B1 (en) | Method for extracting a locking sleeve from a demountable guide tube of a nuclear reactor fuel assembly | |
| TWI375798B (en) | Die design with integrated assembly aid | |
| US5359633A (en) | Assembly method and grid for nuclear fuel assembly | |
| US4699758A (en) | Reusable locking tube in a reconstitutable fuel assembly | |
| JPH0377960B2 (en) | ||
| JPH0659088A (en) | Method for replacing guide pin of fuel assembly and guide pin for replacement | |
| JPH083552B2 (en) | Fuel assembly upper nozzle | |
| JPH0566993B2 (en) | ||
| KR940008251B1 (en) | Fixture for inserting locking tubes in reconstitutable nuclear fuel assembly | |
| US5120492A (en) | Device for extracting a blocking sleeve from a removable guide tube of a fuel assembly of a nuclear reactor | |
| CN210413339U (en) | Crystal dismounting device | |
| KR890001107A (en) | Systems and methods for removing and coalescing fuel rods in a nuclear fuel assembly | |
| JP2017134034A (en) | Device for taking concrete core | |
| CN217588048U (en) | Circuit board program burning device | |
| JPH052280B2 (en) | ||
| CN112055810B (en) | Fatigue testing device for WH type framework expansion tool | |
| EP0222623A1 (en) | Fixture for rectifying guide-thimble damage in reconstitutable nuclear fuel assemblies | |
| CN211562119U (en) | Filter element mounting tool | |
| JPS6161094A (en) | Method and device for mounting fuel aggregate to upper nozzle | |
| JPH026011B2 (en) | ||
| CN111521041A (en) | Sleeving method of tube plate and heat exchange tube | |
| CN216689079U (en) | Continuous rigid frame arch suspender embedded pipe positioning device | |
| JPH0464599B2 (en) | ||
| CN113370301B (en) | Machining jig for motor controller board | |
| CN113514348A (en) | Four-linkage direct shear apparatus and use method thereof |