JPH02147897A - Method and device for assembling fuel assembly - Google Patents
Method and device for assembling fuel assemblyInfo
- Publication number
- JPH02147897A JPH02147897A JP63301964A JP30196488A JPH02147897A JP H02147897 A JPH02147897 A JP H02147897A JP 63301964 A JP63301964 A JP 63301964A JP 30196488 A JP30196488 A JP 30196488A JP H02147897 A JPH02147897 A JP H02147897A
- Authority
- JP
- Japan
- Prior art keywords
- fuel rod
- fuel
- cover
- plug
- rod
- 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
- 239000000446 fuel Substances 0.000 title claims abstract description 174
- 238000000034 method Methods 0.000 title description 13
- 238000003825 pressing Methods 0.000 claims abstract description 6
- 230000002093 peripheral effect Effects 0.000 abstract description 8
- 238000003780 insertion Methods 0.000 abstract description 2
- 230000037431 insertion Effects 0.000 abstract description 2
- 210000000078 claw Anatomy 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 238000003466 welding Methods 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)
- Automatic Assembly (AREA)
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野」
本発明は、燃料集合体を組み立てる際に生じる燃料棒外
周部のスクラッチを防止するためになされた燃料集合体
の組立方法、およびその方法を実施するための組立装置
に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for assembling a fuel assembly and a method for preventing scratches on the outer periphery of fuel rods that occur when assembling a fuel assembly. The present invention relates to an assembly device for carrying out the assembly.
「従来の技術」
加圧水型軽水炉等の原子炉において使用される燃料集合
体の一例として、第９図、第１０図に示すものが知られ
ている。"Prior Art" As an example of a fuel assembly used in a nuclear reactor such as a pressurized water type light water reactor, those shown in FIGS. 9 and 10 are known.
これらの図中符号！および２は上下方向に離間して対向
配置された上部ノズルおよび下部ノズルを示し、これら
上部ノズル！と下部ノズル２との間には、複数ゝの制御
棒案内管３が渡されて固定されている。これら制御棒案
内管３の中途部には、複数の支持格子４が上下方向に互
いに離間して取り付けられている。そして、各支持格子
４の格子空間５を形成する壁部には第１０図に示すよう
に、燃料棒６を支持するためのデインプル７とスプリン
グ８とが互いに対向して形成されており、これにより、
燃料棒６を四方から抑圧支持する各セル９が作られてい
る。These symbols in the diagram! and 2 indicate an upper nozzle and a lower nozzle that are vertically spaced apart and opposed to each other, and these upper nozzles! A plurality of control rod guide tubes 3 are fixed and passed between the lower nozzle 2 and the lower nozzle 2. A plurality of support grids 4 are attached to the middle portions of these control rod guide tubes 3 so as to be spaced apart from each other in the vertical direction. As shown in FIG. 10, dimples 7 and springs 8 for supporting the fuel rods 6 are formed on the walls forming the grid spaces 5 of each support grid 4, facing each other. According to
Each cell 9 is made to suppress and support the fuel rod 6 from all sides.
次に、上記措成の燃料集合体の組立方法について説明す
る。Next, a method for assembling the fuel assembly constructed as described above will be explained.
まず、支持格子４を所定の間隔だけ離間させて配置し、
これら支持格子４の互いに対向する格子空間５の一部に
制御棒案内管３を挿通し、その−端部に燃料棒ガイドプ
レート（図示せず）を固定する。その後、制御棒案内管
３に支持された支持格子４の各セル９に、燃料棒６をグ
リッパにより保持して挿入し、スプリング８によりデイ
ンプル７を介して抑圧固定する。そして、全ての燃料棒
６を挿入通し終えた後、燃料棒ガイドプレートを取り外
し、上部ノズル！および下部ノズル２を制御棒案内管３
の両端部にそれぞれ固定する。First, the support grids 4 are arranged at predetermined intervals,
A control rod guide tube 3 is inserted into a portion of the mutually opposing grid spaces 5 of these support grids 4, and a fuel rod guide plate (not shown) is fixed to the lower end thereof. Thereafter, the fuel rods 6 are held by grippers and inserted into each cell 9 of the support grid 4 supported by the control rod guide tube 3, and are pressed and fixed by the spring 8 via the dimples 7. After inserting all the fuel rods 6, remove the fuel rod guide plate and open the upper nozzle! and lower nozzle 2 to control rod guide tube 3
be fixed to both ends of the
「発明が解決しようとする問題点」
ところで、上記燃料束°合体の組立方法にあっては、支
持格子４の各セル９に燃料棒６を挿入する際に、燃料棒
６の外周部が、スプリング８とデインプル７の間に挟ま
れるため、燃料棒６の外周部には、これらスプリング８
およびデインプル７により軸線方向に沿うスクラッチが
発生してしまう問題があった。"Problems to be Solved by the Invention" By the way, in the above-mentioned fuel bundle assembly method, when inserting the fuel rods 6 into each cell 9 of the support grid 4, the outer circumference of the fuel rods 6 These springs 8 are sandwiched between the spring 8 and the dimple 7, so the outer periphery of the fuel rod 6 is
Also, there was a problem in that the dimples 7 caused scratches along the axial direction.
また、一方、支持格子４の各セル９に、燃料棒６より大
きい所定径のプラグを挿通させてスプリング８を一旦押
し広げ、スプリング８の押圧力およびセル９の径の調整
を行なった後、セル９内に燃料棒６を挿入さＵる方法が
ある。しかしながら、この方法の場合、燃料棒６を挿入
する前に、各セル９にそれぞれ調整用のプラグを挿通し
なければならず、それらの作業が面倒である欠点があっ
た。On the other hand, after inserting a plug with a predetermined diameter larger than the fuel rod 6 into each cell 9 of the support grid 4 and once expanding the spring 8 to adjust the pressing force of the spring 8 and the diameter of the cell 9, There is a method of inserting the fuel rod 6 into the cell 9. However, this method has the disadvantage that it is necessary to insert adjustment plugs into each cell 9 before inserting the fuel rods 6, which is a cumbersome task.
本発明は上記事情に鑑みてなされたもので、燃料集合体
組立の際に、燃料棒外周部へのスクラッチの発生を防止
すると同時に、スプリングの押圧力を調整することがで
きる燃料集合体の組立方法およびそれを好適に実施し得
る組立装置を提供することを目的とする。The present invention has been made in view of the above circumstances, and is capable of assembling a fuel assembly that can prevent the occurrence of scratches on the outer periphery of the fuel rods and at the same time adjust the pressing force of the spring. It is an object of the present invention to provide a method and an assembly device that can suitably carry out the method.
「問題点を解決するための手段」
本願発明の方法は、軸線方向に所定間隔をもって配置さ
れた支持格子の、少なくとも１つの燃料棒押圧用弾性部
材を有するセル内に、それぞれ燃料棒を挿入配置してな
る燃料集合体を組み立てるに際し、燃料棒の外周部ほぼ
全域を円筒状のカバーで覆うとともに、該カバーの先端
に、前記セルを押し広げるべくその径を前記カバーの径
以上に設定されたプラグを取り付け、前記カバーで覆っ
た状態のまま燃料棒を、前記プラグを移動方向前側とし
て前記セル内に挿入し、次いで、燃料棒の後端を把持し
前記プラグ及びカバーをさらに前方へ移動させて燃料棒
から取り外すことを特徴とする。"Means for Solving the Problems" The method of the present invention involves inserting and arranging fuel rods into cells of a support grid arranged at predetermined intervals in the axial direction, each having at least one elastic member for pressing the fuel rods. When assembling a fuel assembly, almost the entire outer circumference of the fuel rod is covered with a cylindrical cover, and a cylindrical cover is provided at the tip of the cover, the diameter of which is set to be larger than the diameter of the cover, in order to spread out the cells. With the plug attached and covered with the cover, insert the fuel rod into the cell with the plug at the front in the moving direction, then grasp the rear end of the fuel rod and move the plug and cover further forward. It is characterized in that it can be removed from the fuel rod.
また、本願発明の装置は、軸線方向に所定間隔置きに配
置した状態で支持格子を支持する組立台と、該組立台の
後方に配置されて、先端にセル押し広げ用のプラグを有
する円筒状のカバーで覆われた多数の燃料棒を、所定間
隔置きに並列に保持する燃料棒マガジンと、前記組立治
具の前方に配され、内蔵された燃料棒引き込み工具を後
方へ移動させて、前記燃料棒マガジンに収納している前
記燃料棒の先端に位置する前記プラグと係合し、該プラ
グを前方へ引き込むことにより、前記燃料棒を組立台で
支持した前記支持格子に挿通させる燃料棒引き込み機と
、前記燃料棒マガジンに併設され、該燃料棒マガジンが
燃料棒移動方向からずれたときそれに代わって前記組立
台の後方に位置し、燃料棒の後端を把持する燃料棒把持
機と、前記燃料棒引き込み機に併設され、該燃料棒引き
込み機が燃料棒移動方向からずれたときそれに代わって
組立台の前方に位置し、前記プラグと係合して該プラグ
を前記カバーごと前方へ移動させて燃料棒から取り外す
カバー除去機とを備えてなることを特徴とする。Further, the device of the present invention includes an assembly stand that supports the support grid while being arranged at predetermined intervals in the axial direction, and a cylindrical shape that is arranged behind the assembly stand and has a plug for pushing and expanding the cells at the tip. A fuel rod magazine that holds a large number of fuel rods covered with a cover of Fuel rod drawing in which the fuel rods are inserted into the support grid supported by the assembly table by engaging with the plugs located at the tips of the fuel rods stored in the fuel rod magazine and drawing the plugs forward; a fuel rod gripping machine that is attached to the fuel rod magazine and that is positioned behind the assembly table to grip the rear end of the fuel rod when the fuel rod magazine is deviated from the fuel rod movement direction; A fuel rod retractor is attached to the fuel rod retractor, and when the fuel rod retractor is deviated from the fuel rod movement direction, it is located in front of the assembly table in place of the fuel rod retractor, and engages with the plug to move the plug forward together with the cover. and a cover removing machine for removing the cover from the fuel rod.
「作用 」
燃料棒挿入の際、燃料棒の外周を覆うカバーを介して燃
料棒の先端に取り付けられたプラグが、セルのスプリン
グに当接してセルを所定量押し広げ、その後燃料棒がセ
ル内に挿入する。``Operation'' When a fuel rod is inserted, a plug attached to the tip of the fuel rod through a cover that covers the outer periphery of the fuel rod contacts the spring of the cell and expands the cell by a predetermined amount, and then the fuel rod is inserted into the cell. Insert into.
また、燃料棒がセル内に挿入するとき、同燃料棒の外周
部は、カバーによって覆われているため、スプリづグあ
るいはデインプルとは接触しない。Furthermore, when the fuel rod is inserted into the cell, the outer periphery of the fuel rod is covered by the cover, so that it does not come into contact with the sprigs or dimples.
「実施例」 以下、本発明の一実施例を図面を参照して説明する。"Example" Hereinafter, one embodiment of the present invention will be described with reference to the drawings.
まず、本発明装置について説明する。第２図は本発明装
置の概略構成を示す側面図、第３図は同平面図である。First, the apparatus of the present invention will be explained. FIG. 2 is a side view showing a schematic configuration of the device of the present invention, and FIG. 3 is a plan view thereof.
これらの図において符号ＩＯは燃料棒６を縦横に収納す
る燃料棒マガジン、１１は各支持格子４を軸線方向に所
定間隔をもって離間させた状態で保持する組立台、１２
は燃料棒引き込み機であり、これらは、燃料集合体を組
み立てる際の燃料棒の移動方向（第２図中ＡＢ方向）に
沿って同軸上に配されている。In these figures, reference numeral IO designates a fuel rod magazine that stores fuel rods 6 vertically and horizontally, 11 designates an assembly table that holds each support grid 4 at a predetermined distance in the axial direction, and 12
2 is a fuel rod retractor, and these are arranged coaxially along the moving direction of the fuel rods (direction AB in FIG. 2) when assembling the fuel assembly.
前記燃料棒引き込み機１２には駆動機構１３によって図
中Ａｎ方向へ移動する移動台１４が配設されている。こ
の移動台Ｉ４には複数の燃料棒弓き込み工具１５が着脱
ぎ在に取り付けられている。The fuel rod drawing machine 12 is provided with a moving table 14 that is moved in the direction An in the figure by a drive mechanism 13. A plurality of fuel rod cutting tools 15 are detachably attached to the movable table I4.
燃料棒引き込み工具１５は、プルロッドとインナーロッ
ドとからなり、プルロッドはガイドデユープの先端にフ
ィンガ１６がねじ嵌合により連結された構造となってい
る（第６図参照）。フィンガ１６は先端が閉塞された管
状のもので、その先端側は先細りテーパ状となっている
。また、フィンガ１６の中央から先端側は円周方向に複
数分割（例えば４分割、６分割）されて仮ばね状となり
、その先端には外爪１７が形成されている。外爪１７は
、プルミツド内の前記インナーロッドが先方へ移動する
際にフィンガ内周部のテーパー面が押されて拡径されて
、後述するプラグ４１の先端内周溝４１ｄに係合し得る
。The fuel rod retraction tool 15 consists of a pull rod and an inner rod, and the pull rod has a structure in which a finger 16 is connected to the tip of a guide duplex by screw fitting (see FIG. 6). The finger 16 is tubular with a closed end, and the end thereof is tapered. Further, the tip end side of the finger 16 is divided into a plurality of sections in the circumferential direction (for example, into 4 sections and 6 sections) to form a temporary spring shape, and an external claw 17 is formed at the tip end thereof. When the inner rod inside the pull mid moves forward, the outer claw 17 is expanded in diameter by pushing the tapered surface of the inner peripheral part of the finger, and can engage with the inner peripheral groove 41d at the tip of the plug 41, which will be described later.
以上の構成は、従来からある燃料集合体の組立装置とほ
ぼ同じである。The above configuration is almost the same as a conventional fuel assembly assembly apparatus.
本装置において、新設したところは以下に説明するとこ
ろである。The new features of this device will be explained below.
すなわち、第２図〜第５図で示す如く燃料棒マガジン１
０の組立台ＩＩ側の支柱２０は、レール２１に沿って、
燃料棒６の移動方向と直交する方向に移動自在とされて
いる。また、レール２Ｉ上には、組立台１１上に移動さ
れた各燃料棒６の後端を把持する燃料棒把持機２２が、
同レール２１に沿って移動自在に配設されている。That is, as shown in FIGS. 2 to 5, the fuel rod magazine 1
The support 20 on the side of the assembly table II of 0 runs along the rail 21,
It is movable in a direction perpendicular to the moving direction of the fuel rods 6. Further, on the rail 2I, there is a fuel rod gripping machine 22 that grips the rear end of each fuel rod 6 that has been moved onto the assembly table 11.
It is disposed so as to be movable along the rail 21.
燃料棒把持機２２について説明すると、第７図中管号２
５はへＢ方向に移動自在とされた移動台を示し、この移
動台２５には、ロッド２７および連結部材２８を介して
外筒２６が取り付けられている。外筒２６は図では！つ
しが示してないが、実際には燃料集合体に組み込まれる
燃料棒６に対応して複数設けられている。外筒２６は燃
料棒６の後端部外周に嵌合される。外筒２６の先端から
若干奥方へ入った内周部には弾性材料（例えば、ポリウ
レタン）からなる円筒体２つが嵌め込まれている。外筒
２６内にはインナーロッド３ｏか軸線方向に沿って移動
自在に配設されている。インナーロッド３０の先端には
燃料棒６の後端外周に嵌合する円筒部３０ａが設けられ
ている。To explain the fuel rod gripping machine 22, pipe number 2 in Fig.
Reference numeral 5 denotes a movable table movable in the direction B, and an outer cylinder 26 is attached to the movable table 25 via a rod 27 and a connecting member 28. The outer cylinder 26 is not shown in the figure! Although not shown, a plurality of rods are actually provided corresponding to the fuel rods 6 to be incorporated into the fuel assembly. The outer cylinder 26 is fitted onto the outer periphery of the rear end portion of the fuel rod 6 . Two cylindrical bodies made of an elastic material (for example, polyurethane) are fitted into the inner peripheral portion of the outer cylinder 26, which is located slightly inward from the tip of the outer cylinder 26. An inner rod 3o is disposed within the outer cylinder 26 so as to be movable along the axial direction. A cylindrical portion 30a that fits on the outer periphery of the rear end of the fuel rod 6 is provided at the tip of the inner rod 30.
インナーロッド３０は前記ロッド２７の外周にＡＢ方向
移動自在とされたスライダ３１に連結されている。スラ
イダ３！は、ピン３２を中心に回動するアーム３３によ
って入方向へ移動されるとき、インナーロッド３ｏを入
方向へ移動させて、インナーロッド先端の円筒部３０ａ
と、外筒２６の内周部先端の突出部２．６ ａとの間で
、円筒体２９を挟む。円筒体２９は外方への移動が規制
されている関係上、内方へ膨らみ、燃料棒６後端を押圧
把持する。なお、スライダ３１あるいはインナーロッド
３０には復帰用のバネ（図示せず）が取り付けられ、ア
ーム３３が第７図で示す元の位置に戻ったときに、バネ
の復元力によってインナーロッド３０をＢ方向に移動さ
せて、円筒体２９の押圧を解除する。円筒体２９は自身
の弾性作用によって元の状態に戻り、燃料棒６の把持を
解く。The inner rod 30 is connected to the outer periphery of the rod 27 to a slider 31 that is movable in AB directions. Slider 3! When moved in the entry direction by the arm 33 rotating around the pin 32, the inner rod 3o is moved in the entry direction and the cylindrical portion 30a at the tip of the inner rod is moved.
The cylindrical body 29 is sandwiched between the cylindrical body 29 and the protruding portion 2.6a at the tip of the inner peripheral portion of the outer cylinder 26. Since the cylindrical body 29 is restricted from moving outward, it bulges inward and presses and grips the rear end of the fuel rod 6. A return spring (not shown) is attached to the slider 31 or the inner rod 30, and when the arm 33 returns to the original position shown in FIG. direction to release the pressure on the cylindrical body 29. The cylindrical body 29 returns to its original state by its own elastic action and releases its grip on the fuel rod 6.
また、前記燃料棒引き込み機１２にはカバー除去機３５
が併設され、燃料棒引き込み機１２およびカバー除去機
３５はレール３６に沿って、燃料棒６の移動方向と直交
する方向に移動自在とされている。Further, the fuel rod pulling machine 12 includes a cover removing machine 35.
The fuel rod pulling machine 12 and the cover removing machine 35 are movable along the rail 36 in a direction perpendicular to the moving direction of the fuel rods 6.
上記カバー除去機３５は、前記燃料棒引き込み機１２と
ほぼ同一の構成となっている。すなわち、前記燃料棒引
き込み機１２には駆動機構によって図中ＡＢ力方向移動
する移動台（ともに図示せず）が配設され、移動台には
複数のカバー引き込み工具３７が性膜自在に取り付けら
れている。カバー引き込み工具３７は、前記燃料棒引き
込み工具１５とほぼ同一の構成のもので、プルロッドと
インナーロッドとを有し、プルロッドの先端にはフィン
ガ３８が取り付けられている（第１図参照）。フィンガ
３８は、前述したフィンガ１６と同一のもので、インナ
ーロッドが先方へ移動するとき、フィンガ内周部のテー
パー面を押されて先端の外爪３９が拡径し、該外爪３９
がプラグ４１の先端内周ｌｌｉ ４ ＋ ｄに係合し得
るようになっている。The cover removing machine 35 has almost the same configuration as the fuel rod pulling machine 12. That is, the fuel rod retracting machine 12 is provided with a movable table (both not shown) that moves in the AB force direction in the figure by a drive mechanism, and a plurality of cover retracting tools 37 are freely attached to the movable table. ing. The cover retraction tool 37 has almost the same structure as the fuel rod retraction tool 15, and has a pull rod and an inner rod, and a finger 38 is attached to the tip of the pull rod (see FIG. 1). The finger 38 is the same as the finger 16 described above, and when the inner rod moves forward, the tapered surface of the inner peripheral part of the finger is pushed and the outer claw 39 at the tip expands in diameter.
can be engaged with the inner circumference lli 4 + d of the tip of the plug 41.
なお゛、このようにほぼ同一構成である、燃料棒引き込
み機１２とカバー除去機３５とを別ＩＩηに設けたのは
、カバー除去機３５によって取り外したカバー４０およ
びプラグ４１を、再利用のため該カバー除去機３５から
取り外す作業と、燃料棒引き込み機１２によるマガジン
ＩＯからの燃料棒６の引き込み作業とを並行して行うた
めであり、また、双方の引き込み距離が異なるためであ
る。Furthermore, the reason why the fuel rod pulling machine 12 and the cover removing machine 35, which have almost the same configuration, are provided separately is that the cover 40 and plug 41 removed by the cover removing machine 35 can be reused. This is because the work of removing the cover from the cover removing machine 35 and the work of drawing the fuel rods 6 from the magazine IO by the fuel rod drawing machine 12 are performed in parallel, and also because the drawing distances for both are different.
次に、上記装置を用いた燃料集合体の組み立て方法につ
いて説明する。Next, a method for assembling a fuel assembly using the above device will be explained.
まず、第１図および第６図に示すように、燃料棒６の外
周部の後端を残すほぼ全域を円筒状のカバー４０で覆う
。該カバー４０は金属製のものでもプラスデック製のも
のでもよく、燃料棒６を覆い得るよう、内径を燃料棒６
の径Ｑ０よりも大きく設定されていればよい。First, as shown in FIGS. 1 and 6, almost the entire area of the outer periphery of the fuel rod 6 except for the rear end is covered with a cylindrical cover 40. The cover 40 may be made of metal or plastic deck, and has an inner diameter so that it can cover the fuel rod 6.
It is sufficient if the diameter is set larger than the diameter Q0.
カバー４０の先端（燃料棒の移動方向前方）には、プラ
グ４１が溶接等適宜固定手段で取り付けである。プラグ
４１は、第１０図で示すスプリング８あるいはデインプ
ル７に当接してスプリング８を変形させ、セル９を押し
広げるものであり、同プラグ４１は、セル径よりら小さ
く設定された先端小径部４１ａと、セル９を押し広げ得
るよう、その径σ、を面記カバー４０の外径ｆ２．より
もさらに大径に設定された後端の大径部４１ｃと、画部
分４１ａ、４１ｃをつなぐ中間のテーパ部／ｌｌｂとを
備える。A plug 41 is attached to the tip of the cover 40 (forward in the direction of movement of the fuel rods) by suitable fixing means such as welding. The plug 41 comes into contact with the spring 8 or the dimple 7 shown in FIG. 10 to deform the spring 8 and spread the cell 9. Then, in order to spread the cell 9, its diameter σ is set to the outer diameter f2 of the surface cover 40. It is provided with a large diameter portion 41c at the rear end which is set to have a larger diameter than the above, and an intermediate tapered portion /llb that connects the image portions 41a and 41c.
なお、この例においては、カバー４０の外径をプラグ４
１の大径部外径より小に設定しているが、同じ大きさに
設定してもよい。In this example, the outer diameter of the cover 40 is set to the plug 4.
Although it is set to be smaller than the outer diameter of the large diameter portion of No. 1, it may be set to the same size.
小径部４１ａの先端には、前記燃料棒引き込み工具１５
およびカバー引き込み工具３７の外爪１７．３９にそれ
ぞれ係合する内周溝４１ｄが形成されている。また、大
径部４１ｃの後側には、外周に前記カバー４゛０が嵌合
状態で連結される連結部４１ｅが設けられている。The fuel rod retracting tool 15 is installed at the tip of the small diameter portion 41a.
and an inner circumferential groove 41d that engages with the outer claws 17 and 39 of the cover retracting tool 37, respectively. Further, on the rear side of the large diameter portion 41c, there is provided a connecting portion 41e on the outer periphery of which the cover 4'0 is connected in a fitted state.
上記カバー４０で覆われかつ先端にプラグ４１が取り付
けられた燃料棒６を、プラグ４１を移動方向前方へ向け
て燃料棒マガジンｌＯに組み込む。The fuel rod 6 covered with the cover 40 and having a plug 41 attached to its tip is assembled into the fuel rod magazine IO with the plug 41 facing forward in the direction of movement.
次に、第２図、第３図に示す如く、組立台ＩＩの前方に
配置させた燃料棒引き込み機Ｉ２から、移動台１４の移
動により燃料棒引き込み工具１５を後方に延ばし、先端
に取り付けたフィンガ１６の外爪１７を、前述した如く
インナーロッドの移動操作によってプラグ４１後端の内
周溝４１ｄに係合さ仕、この状態で引き込み工具１５を
前方へ引き込み、燃料棒６を組立台ＩＩで支持している
各支持格子４に挿入する。Next, as shown in FIGS. 2 and 3, the fuel rod retracting tool 15 is extended rearward by moving the moving table 14 from the fuel rod retracting machine I2 placed in front of the assembly table II, and attached to the tip. The outer claw 17 of the finger 16 is engaged with the inner circumferential groove 41d at the rear end of the plug 41 by moving the inner rod as described above, and in this state, the retraction tool 15 is pulled forward and the fuel rod 6 is moved to the assembly table II. Insert into each support grid 4 supported by.
このとき、燃料棒挿入の前にプラグ４１がスプリング８
およびデインプル７に当接して、セル９を拡径する。し
たがって、スプリング８の押圧力Ｅ 整カ行なえ、かつ
、それらを燃料棒６の挿入と同時に行なうことができる
。したがって、たとえ、燃料棒６の外周部を覆うカバー
４０が柔らかい材料で作った場合でも、燃料棒６外周部
にスクラッチは殆ど生じない。At this time, the plug 41 is inserted into the spring 8 before the fuel rod is inserted.
and contacts the dimple 7 to expand the diameter of the cell 9. Therefore, the pressing force E of the spring 8 can be adjusted and can be done simultaneously with the insertion of the fuel rod 6. Therefore, even if the cover 40 covering the outer periphery of the fuel rod 6 is made of a soft material, scratches hardly occur on the outer periphery of the fuel rod 6.
また、上記燃料棒６の挿入において、先端にプラグ４１
のついたカバー４０と燃料棒６とは、特別な固定手段を
用いていない。これは、燃料棒６が長く（例えば４〜５
Ｉ＋＋）燃料棒６とカバー４０との接触面積を広く採れ
るため、両者に発生する摩擦力に、Ｌって、燃料棒６を
カバー４０と一体的に移動できるためである。In addition, when inserting the fuel rod 6, a plug 41 is attached to the tip.
No special fixing means is used for the cover 40 and the fuel rod 6. This is because the fuel rods 6 are long (for example, 4 to 5
I++) This is because the contact area between the fuel rods 6 and the cover 40 can be widened, and the frictional force generated between the two allows the fuel rods 6 to move integrally with the cover 40.
上記燃料棒６の支持格子４への挿入操作の後、燃料棒引
き込み工具１５のインナーロッドを後退させて外爪！７
とプラグ４１との係合を解く。そして、燃料棒引き込み
工具１５をさらに若干前方へ移動させた後、燃料棒引き
込み機１２およびカバー除去機３５を第５図に示す如く
Ｃ方向にずらし、カバー除去機３５を組立台１１の前方
に位置させる。After the fuel rod 6 is inserted into the support grid 4, the inner rod of the fuel rod retracting tool 15 is retreated and the outer rod is opened! 7
and the plug 41 are disengaged. After further moving the fuel rod retracting tool 15 slightly forward, the fuel rod retracting machine 12 and the cover removing machine 35 are shifted in the direction C as shown in FIG. position.
上記操作に並行して、燃料棒マガジンｌＯの前側の支柱
２０および燃料棒把持機２２をＣ方向へずらし、燃料棒
把持機２２を組立台１１の後方に位置させる。In parallel with the above operation, the front support column 20 and fuel rod gripper 22 of the fuel rod magazine IO are shifted in the C direction, and the fuel rod gripper 22 is positioned behind the assembly table 11.
次に、燃料棒把持機２２の移動台２５を第７図中入方向
へ移動させ、外筒２６の先端を燃料棒６の後端に嵌合さ
せる。そして、前述した如くアーム３３を回動しインナ
ーロッド３０をＣ方向に移動さＵｏて、同把持機２２の
外筒２６内に組み込んだ円筒体２９により燃料棒６の後
端を把持する（第１図参照）。Next, the movable table 25 of the fuel rod gripper 22 is moved in the direction shown in FIG. Then, as described above, the arm 33 is rotated to move the inner rod 30 in the C direction, and the rear end of the fuel rod 6 is gripped by the cylindrical body 29 built into the outer cylinder 26 of the gripper 22 (the (See Figure 1).
次いで、カバー除去機３５のカバー引き込み工具３７を
後方（第５図中日方向）へ若干移動させて、前述した操
作によりフィンガ３８の外爪３９を拡径させてプラグ４
１の内周溝４１ｄに係合する。Next, the cover retracting tool 37 of the cover removing machine 35 is moved slightly rearward (in the direction of Chunichi in FIG.
It engages with the inner circumferential groove 41d of No. 1.
この状態、で、フィンガ３°８を前方へ移動させて、同
プラグおよびカバー４０を燃料棒６から引き抜き除去す
る。In this state, the finger 3°8 is moved forward and the plug and cover 40 are pulled out and removed from the fuel rod 6.
以上の操作によって、燃料棒６を外周部にスクラッチを
形成さＵｏることなく、支持格子４内に挿入セットする
ことができる。By the above operations, the fuel rods 6 can be inserted and set into the support grid 4 without forming scratches on the outer periphery.
「発明の効果」
以上説明したように本発明方法によれば、燃料棒の外周
部ほぼ全域を円筒状のカバーで覆うとともに、該カバー
の先端に、前記セルを押し広げるべくその径を前記カバ
ー・の径以上に設定されたプラグを取り付け、前記カバ
ーで覆った状態のまま燃料棒を、前記プラグを移動方向
ｎτ■側として前記セル内に挿入し、次いで、燃料棒の
後端を把持し前記プラグ及びカバーをさらに前方へ移動
させて燃料棒から取り外すから、燃料棒をセルへ挿入す
る際、同燃料棒の外周部がセルと接触するのを防止でき
、スクラッチの発生を防止できる。また、支持格子のセ
ル内へのプラグ挿通を、燃料棒の挿入と同時に行なえ、
従来の方法のような、燃料棒の挿入とは別にプラグを挿
通させる等の面倒な作業を行なう必要はない。"Effects of the Invention" As explained above, according to the method of the present invention, almost the entire outer periphery of a fuel rod is covered with a cylindrical cover, and the diameter of the cover is set at the tip of the cover so as to spread out the cells. Attach a plug with a diameter larger than or equal to , insert the fuel rod covered with the cover into the cell with the plug on the nτ■ side in the moving direction, and then grasp the rear end of the fuel rod. Since the plug and cover are moved further forward and removed from the fuel rod, when the fuel rod is inserted into the cell, the outer circumference of the fuel rod can be prevented from coming into contact with the cell, and scratches can be prevented from occurring. In addition, the plugs can be inserted into the cells of the support grid at the same time as the fuel rods are inserted.
Unlike the conventional method, there is no need to perform troublesome work such as inserting a plug separately from inserting the fuel rod.
また、本発明装置によれば、軸線方向に所定間隔置きに
配置した状態で支Ｐｉ格子を支持する組立台と、該組立
台の後方に配置されて、先端にセル押し広げ用のプラグ
を有する円筒状のカバーで覆われた多数の燃料棒を、所
定間隔置きに並列に保持する燃料棒マガジンと、前記組
立治具の前方に配され、内蔵された燃料棒引き込み工具
を後方へ移動させて、前記燃料棒マガジンに収納してい
る前記燃料棒の先端に位置する前記プラグと係合し、該
プラグを前方へ引き込むことにより、前記燃料棒を組立
台で支持した前記支持格子に挿通させる燃料棒引き込み
機と、前記燃料棒マガジンに併設され、該燃料棒マガジ
ンが燃料棒移動方向からずれたときそれに代わって前記
組立台の後方に位置し、燃料棒の後端を把持する燃料棒
把持機と、前記燃料棒引き込み機に併設され、該燃料棒
引き込み機が燃料棒移動方向からずれたときそれに代わ
って組立台の前方に位置し、前記プラグと係合して該プ
ラグを前記カバーごと前方へ移動させて燃料棒から取り
外すカバー除去機とを備えているから、上記方法を簡便
なｈ■成で実施できる。Further, the device of the present invention has an assembly table that supports the supporting Pi grids while being arranged at predetermined intervals in the axial direction, and a plug placed at the rear of the assembly table for pushing and expanding the cells at the tip. A fuel rod magazine holds a large number of fuel rods covered with a cylindrical cover in parallel at predetermined intervals, and a built-in fuel rod retracting tool placed in front of the assembly jig is moved rearward. , a fuel that engages with the plug located at the tip of the fuel rod stored in the fuel rod magazine and pulls the plug forward to insert the fuel rod into the support grid supported on the assembly table; a rod pulling machine; and a fuel rod gripping machine, which is attached to the fuel rod magazine and is positioned behind the assembly table in place of the fuel rod magazine when it deviates from the fuel rod moving direction, and grips the rear ends of the fuel rods. is attached to the fuel rod retractor, and when the fuel rod retractor deviates from the direction of fuel rod movement, it is located in front of the assembly stand instead, and engages with the plug to move the plug forward along with the cover. Since the fuel rod is equipped with a cover removing machine that moves the fuel rod to the fuel rod and removes the cover from the fuel rod, the above method can be carried out with a simple construction.
第１図〜第８図は・本発明装置の一実施例を示し、第１
図は後述する第４図におけるＩ矢視部分の拡大詳細図、
第２図は装置の側面図、第３図は同平面図、第４図は同
装置の燃料集合体組立途中の状聾を示す側面図、第５図
は同平面図、第６図は第２図における■矢視部分の拡大
詳細図、第７図は第４図における■矢視部分後拡大詳細
図、第８図は第７図の■−■線に沿う断面図。第９図は
燃料集合体の正面図、第１Ｏ図は第８図に示す支持格子
の一部平面図である。
８・・・・・・フィンガ、
０・・・・・・カバー
１ｄ・・・・・・内周溝。Figures 1 to 8 show one embodiment of the device of the present invention;
The figure is an enlarged detailed view of the I arrow section in Figure 4, which will be described later.
Fig. 2 is a side view of the device, Fig. 3 is a plan view of the same, Fig. 4 is a side view showing the state of the device during assembly of a fuel assembly, Fig. 5 is a plan view of the same, and Fig. 6 is a plan view of the same. 2. FIG. 7 is an enlarged detailed view of the portion shown in FIG. 4 as shown in FIG. 4. FIG. FIG. 9 is a front view of the fuel assembly, and FIG. 1O is a partial plan view of the support grid shown in FIG. 8. 8...Finger, 0...Cover 1d...Inner circumferential groove.
Claims (2)
の、少なくとも１つの燃料棒押圧用弾性部材を有するセ
ル内に、それぞれ燃料棒を挿入配置してなる燃料集合体
を組み立てるに際し、 燃料棒の外周部ほぼ全域を円筒状のカバーで覆うととも
に、該カバーの先端に、前記セルを押し広げるべくその
径を前記カバーの径以上に設定されたプラグを取り付け
、前記カバーで覆った状態のまま燃料棒を、前記プラグ
を移動方向前側として前記セル内に挿入し、次いで、燃
料棒の後端を把持し前記プラグ及びカバーをさらに前方
へ移動させて燃料棒から取り外すことを特徴とする燃料
集合体の組立方法。(1) When assembling a fuel assembly in which fuel rods are inserted into cells each having at least one fuel rod pressing elastic member of a support grid arranged at predetermined intervals in the axial direction, Almost the entire outer periphery is covered with a cylindrical cover, and a plug is attached to the tip of the cover, the diameter of which is set to be larger than the diameter of the cover in order to spread the cells, and the fuel is poured while covered with the cover. A fuel assembly characterized in that the rod is inserted into the cell with the plug at the front in the direction of movement, and then the rear end of the fuel rod is grasped and the plug and cover are moved further forward and removed from the fuel rod. How to assemble.
子を支持する組立台と、 該組立台の後方に配置されて、先端にセル押し広げ用の
プラグを有する円筒状のカバーで覆われた多数の燃料棒
を、所定間隔置きに並列に保持する燃料棒マガジンと、 前記組立治具の前方に配され、内蔵された燃料棒引き込
み工具を後方へ移動させて、前記燃料棒マガジンに収納
している前記燃料棒の先端に位置する前記プラグと係合
し、該プラグを前方へ引き込むことにより、前記燃料棒
を組立台で支持した前記支持格子に挿通させる燃料棒引
き込み機と、前記燃料棒マガジンに併設され、該燃料棒
マガジンが燃料棒移動方向からずれたときそれに代わっ
て前記組立台の後方に位置し、燃料棒の後端を把持する
燃料棒把持機と、 前記燃料棒引き込み機に併設され、該燃料棒引き込み機
が燃料棒移動方向からずれたときそれに代わって組立台
の前方に位置し、前記プラグと係合して該プラグを前記
カバーごと前方へ移動させて燃料棒から取り外すカバー
除去機とを備えてなることを特徴とする燃料集合体の組
立装置。(2) An assembly table that supports the support grids while being arranged at predetermined intervals in the axial direction, and a cylindrical cover placed behind the assembly table and covered with a cylindrical cover having a plug for pushing and expanding the cells at the tip. a fuel rod magazine that holds a large number of fuel rods in parallel at predetermined intervals; and a built-in fuel rod retracting tool placed in front of the assembly jig, which is moved rearward and stored in the fuel rod magazine. a fuel rod retractor that engages with the plug located at the tip of the fuel rod and draws the plug forward to insert the fuel rod through the support grid supported on an assembly stand; a fuel rod gripping machine that is attached to a rod magazine and is positioned behind the assembly stand to grip the rear ends of the fuel rods when the fuel rod magazine deviates from the fuel rod movement direction; and the fuel rod retracting machine When the fuel rod pulling machine deviates from the direction of fuel rod movement, it is located in front of the assembly table instead, engages with the plug, moves the plug forward together with the cover, and removes the fuel rod from the fuel rod. A fuel assembly assembly device comprising a cover removing machine for removing the cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63301964A JPH083553B2 (en) | 1988-11-29 | 1988-11-29 | Assembly method and apparatus for fuel assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63301964A JPH083553B2 (en) | 1988-11-29 | 1988-11-29 | Assembly method and apparatus for fuel assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02147897A true JPH02147897A (en) | 1990-06-06 |
| JPH083553B2 JPH083553B2 (en) | 1996-01-17 |
Family
ID=17903245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63301964A Expired - Lifetime JPH083553B2 (en) | 1988-11-29 | 1988-11-29 | Assembly method and apparatus for fuel assembly |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH083553B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111656459A (en) * | 2018-01-29 | 2020-09-11 | 韩电原子力燃料株式会社 | Nuclear fuel rod end distance adjusting device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5311294A (en) * | 1976-07-17 | 1978-02-01 | Genshi Nenryo Kogyo | Method of assembling reactor fuel assembly |
| JPS60181680A (en) * | 1984-02-29 | 1985-09-17 | 日本ニユクリア・フユエル株式会社 | Method of assembling and overhauling nuclear fuel aggregate |
| JPS60225998A (en) * | 1984-04-24 | 1985-11-11 | 三菱電機株式会社 | Home security sensor transmission system |
-
1988
- 1988-11-29 JP JP63301964A patent/JPH083553B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5311294A (en) * | 1976-07-17 | 1978-02-01 | Genshi Nenryo Kogyo | Method of assembling reactor fuel assembly |
| JPS60181680A (en) * | 1984-02-29 | 1985-09-17 | 日本ニユクリア・フユエル株式会社 | Method of assembling and overhauling nuclear fuel aggregate |
| JPS60225998A (en) * | 1984-04-24 | 1985-11-11 | 三菱電機株式会社 | Home security sensor transmission system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111656459A (en) * | 2018-01-29 | 2020-09-11 | 韩电原子力燃料株式会社 | Nuclear fuel rod end distance adjusting device |
| CN111656459B (en) * | 2018-01-29 | 2023-10-17 | 韩电原子力燃料株式会社 | Nuclear fuel rod end distance adjusting device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH083553B2 (en) | 1996-01-17 |
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