JPS6342239B2 - - Google Patents
Info
- Publication number
- JPS6342239B2 JPS6342239B2 JP58223540A JP22354083A JPS6342239B2 JP S6342239 B2 JPS6342239 B2 JP S6342239B2 JP 58223540 A JP58223540 A JP 58223540A JP 22354083 A JP22354083 A JP 22354083A JP S6342239 B2 JPS6342239 B2 JP S6342239B2
- Authority
- JP
- Japan
- Prior art keywords
- fuel assembly
- nuclear fuel
- binding material
- manufacturing
- water
- 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
Links
- 239000000446 fuel Substances 0.000 claims description 39
- 239000000463 material Substances 0.000 claims description 23
- 239000003758 nuclear fuel Substances 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 239000002904 solvent Substances 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000000155 melt Substances 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 2
- 230000008020 evaporation Effects 0.000 claims 1
- 238000001704 evaporation Methods 0.000 claims 1
- -1 or burns Substances 0.000 claims 1
- 125000006850 spacer group Chemical group 0.000 description 14
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000000452 restraining effect Effects 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
- Fuel Cell (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は核燃料集合体の製造方法に係り、特に
組立時において燃料棒表面に傷が発生することを
確実に防止するようにした核燃料集合体の製造方
法に関する。[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a method for manufacturing a nuclear fuel assembly, and in particular to a method for manufacturing a nuclear fuel assembly that reliably prevents damage to the surface of fuel rods during assembly. Regarding the manufacturing method.
一般に、原子炉用の燃料集合体においては、そ
の長手方向複数個所に燃料棒スペーサを設け、複
数本の燃料棒の間隔保持を行なうようにしてあ
る。
Generally, in a fuel assembly for a nuclear reactor, fuel rod spacers are provided at a plurality of locations in the longitudinal direction of the fuel assembly to maintain the spacing between the plurality of fuel rods.
すなわち、第１図は上記原子炉用の燃料集合体
の縦断面図であつて、燃料チヤンネル１内には、
上下両端部をそれぞれ上部タイプレート２および
下部タイプレート３に支持された複数本の燃料棒
４およびウオータロツド５が配列装着されてお
り、さらに上記燃料棒４を整列支持し燃料棒４の
横方向の振動を拘束するとともに冷却材の流路を
確保するためのスペーサ６が、上記燃料棒４の軸
方向に複数個設けられている。 That is, FIG. 1 is a longitudinal cross-sectional view of the fuel assembly for the above-mentioned nuclear reactor, and in the fuel channel 1, there are
A plurality of fuel rods 4 and water rods 5 are installed in an array, with their upper and lower ends supported by an upper tie plate 2 and a lower tie plate 3, respectively. A plurality of spacers 6 are provided in the axial direction of the fuel rods 4 for restraining vibration and ensuring a coolant flow path.
上記スペーサ６は、第２図および第３図に示す
ように正方形の外枠７を有し、その外枠７内に互
いに格子状に配設されたバー８，９およびデイバ
イダー１０，１１によつて複数個のセル１２が形
成されている。また、上記バー８，９の各交差部
には、各側部に外側方に突出する板ばね部１３ａ
を有するランタンスプリング１３が装着されてお
り、上記各セル１２内に挿入された燃料棒４を、
セル１２の隅角部から前記デイバイダ１０，１１
に形成されたＳベンド１０ａ，１１ａに対して弾
性的に圧接するようにしてある。 The spacer 6 has a square outer frame 7, as shown in FIGS. 2 and 3, and is comprised of bars 8, 9 and dividers 10, 11 arranged in a grid pattern within the outer frame 7. A plurality of cells 12 are formed. Further, at each intersection of the bars 8 and 9, a leaf spring portion 13a protruding outward on each side is provided.
A lantern spring 13 having
The dividers 10 and 11 from the corner of the cell 12
It is configured to elastically come into pressure contact with the S-bends 10a and 11a formed in the.
そこで、上記核燃料集合体の組立てに際して
は、下部タイプレート３およびスペーサ６を所定
位置に固定し、燃料棒４およびウオータロツド５
をそれぞれスペーサ６のセル１２内に押し込み、
その下端を下部タイプレート３に装着し、上端に
上部タイプレート２を取りつけて固定する。 Therefore, when assembling the above-mentioned nuclear fuel assembly, the lower tie plate 3 and spacer 6 are fixed at predetermined positions, and the fuel rods 4 and water rods 5 are
into the cells 12 of the spacer 6,
The lower end is attached to the lower tie plate 3, and the upper tie plate 2 is attached and fixed to the upper end.
ところが、上述のような燃料集合体の組立てに
おいては、各燃料棒４をセル１２内に挿通させる
場合に、その燃料棒がスペーサ６のランタンスプ
リング１３の板ばね部１３ａおよびＳベンド１０
ａ，１１ａに摺接するため、燃料棒の表面に傷が
つくことがある。 However, in assembling the fuel assembly as described above, when each fuel rod 4 is inserted into the cell 12, the fuel rod is inserted into the leaf spring portion 13a of the lantern spring 13 of the spacer 6 and the S bend 10.
Since it comes into sliding contact with a and 11a, the surface of the fuel rod may be scratched.
したがつて、従来上記燃料棒の表面に傷がつく
ことを防止するために、スペーサのランタンスプ
リング１３の板ばね部１３ａやＳベンド１０ａ，
１１ａをひもで縛りつけてばねの突出部を押え、
燃料棒を挿入するセル内空間を大きくした状態で
燃料棒の挿入を行なうようなことが行なわれてい
る。 Therefore, conventionally, in order to prevent the surface of the fuel rod from being damaged, the leaf spring portion 13a of the lantern spring 13 of the spacer, the S-bend 10a,
Tie 11a with a string and hold down the protruding part of the spring.
Insertion of fuel rods is carried out in a state where the space inside the cell into which the fuel rods are inserted is enlarged.
しかしながら、上述のようにランタンスプリン
グの板ばね等の弾性部材を予めひもで縛りつけて
おくものにおいては、組立後には多数の燃料棒が
非常に密な状態に配列されることから、上記ひも
の結びを解くことがきわめて困難である等の問題
がある。 However, in the case where the elastic members such as the leaf springs of the lantern springs are tied in advance with string as described above, many fuel rods are arranged in a very dense manner after assembly, so it is difficult to tie the strings together. There are problems such as it being extremely difficult to solve.
本発明はこのような点に鑑み、比較的に簡単な
方法によつて、燃料棒の表面に傷が発生すること
を確実に防止し得るようにした核燃料集合体の製
造方法を得ることを目的とする。
In view of the above, an object of the present invention is to provide a method for manufacturing a nuclear fuel assembly that can reliably prevent the occurrence of scratches on the surface of fuel rods using a relatively simple method. shall be.
本発明は、水または溶剤に溶解するか或は低温
度に加熱することにより燃焼、溶融または蒸発す
る縛結材によつて、予め燃料棒押圧用弾性部材を
縛結圧縮してセル内空間を拡げておいて、上記セ
ル内にそれぞれ燃料棒を挿入し、しかる後核燃料
集合体を水または溶剤中に浸漬するか低温度に加
熱して上記縛結材を溶融または蒸発させ、上記弾
性部材を作動状態にすることを特徴とする。
The present invention binds and compresses an elastic member for pressing a fuel rod in advance using a binding material that burns, melts, or evaporates by dissolving in water or a solvent or heating to a low temperature, thereby filling a space inside a cell. The fuel rods are inserted into the cells after being expanded, and the nuclear fuel assembly is then immersed in water or a solvent or heated to a low temperature to melt or evaporate the binding material, and the elastic member is then immersed in the nuclear fuel assembly. It is characterized by being in an operating state.
以下、第４図乃至第６図を参照して本発明の一
実施例について説明する。
An embodiment of the present invention will be described below with reference to FIGS. 4 to 6.
第４図はスペーサ６のバー８，９の交差部に装
着するランタンスプリング１３の側面図であつ
て、このランタンスプリング１３の板ばね部１３
ａを、水または溶剤等によつて溶解する繊維質材
等からなる縛結材１４によつて予め縛結する。し
かして、このように板ばね部１３ａを縛結材１４
によつて縛結したランタンスプリング１３を、第
５図に示すようにスペーサ６のバー８，９の交差
部にそれぞれ組込むことによつて、各セル１２内
の燃料棒挿通用空間１５を大きくする。そこで、
この第５図の状態で燃料棒を上記セル１２内に挿
入し、その両端に下部タイプレートおよび上部タ
イプレートを取り付け、全ての組立てが終了した
後、その燃料集合体を水または溶剤に浸漬して縛
結材１４を溶解除去せしめ、ランタンスプリング
１３の板ばね部１３ａを作動状態とし、第６図に
示すように燃料棒４を所定位置に保持するように
する。 FIG. 4 is a side view of the lantern spring 13 attached to the intersection of the bars 8 and 9 of the spacer 6, and shows the plate spring portion 13 of the lantern spring 13.
a is tied in advance with a binding material 14 made of a fibrous material or the like that dissolves in water or a solvent. In this way, the plate spring portion 13a is tied to the binding material 14.
By assembling the lantern springs 13 tied together at the intersections of the bars 8 and 9 of the spacer 6 as shown in FIG. 5, the space 15 for fuel rod insertion in each cell 12 is enlarged. . Therefore,
Insert the fuel rod into the cell 12 in the state shown in Fig. 5, attach a lower tie plate and an upper tie plate to both ends of the fuel rod, and after completing all assembly, immerse the fuel assembly in water or solvent. The binding material 14 is melted and removed, and the plate spring portion 13a of the lantern spring 13 is activated to hold the fuel rod 4 in a predetermined position as shown in FIG.
なお、縛結材としては水溶性フイルムを使用
し、組立完了後燃料集合体を温水浴に浸漬してこ
れを除去するようにしてもよく、また縛結材とし
てアルコールに溶解する化成フイルムを用い、組
立完了後アルコールに浸漬してこれを除去し、或
はナイロン糸を用いて組立完了後これを300℃程
度に加熱してこれを除去するようにしてもよい。
但し、縛結材を加熱によつて除去する場合には、
その加熱温度は当該核燃料集合体の構成材料の特
性等から500℃以下に制限される。なお、第５図
および第６図において符号１６はスペーサ６の外
枠内面に形成された突起部である。 Note that a water-soluble film may be used as the binding material, and this may be removed by immersing the fuel assembly in a hot water bath after assembly is completed, or a chemical film that dissolves in alcohol may be used as the binding material. After assembly is completed, this may be removed by immersion in alcohol, or after assembly is completed, nylon thread may be used and heated to about 300° C. to remove this.
However, when removing the binding material by heating,
The heating temperature is limited to 500°C or less due to the characteristics of the constituent materials of the nuclear fuel assembly. In addition, in FIGS. 5 and 6, reference numeral 16 is a protrusion formed on the inner surface of the outer frame of the spacer 6. As shown in FIG.
以上説明したように、本発明においては水また
は溶剤に溶解するか或は低温度に加熱することに
より燃焼、溶融または蒸発する縛結材によつて、
予めランタンスプリングの如き燃料棒押圧用弾性
部材を縛結圧縮してセル内空間を拡げておいて、
上記セル内にそれぞれ燃料棒を挿入し、しかる後
核燃料集合体を水または溶剤中に浸漬するか低温
度に加熱して上記縛結材を溶融または蒸発させ、
上記弾性部材を作動状態とするようにしたので、
燃料棒挿入工程時においてはセル内空間が拡大さ
れていることにより燃料棒と燃料棒押圧部材等と
の摺接が殆どなくなり、燃料棒表面への傷の発生
を防止することができる。しかもその組立完了後
においては核燃料集合体を溶剤等の中に浸漬する
だけで縛結材を除去するので、従来のように組立
完了後いちいちひもを解く必要がなく、縛結材の
除去をきわめて容易に行なうことができて、核燃
料集合体の製造を簡単化することができる。
As explained above, in the present invention, a binding material that burns, melts, or evaporates by dissolving in water or a solvent or heating to a low temperature,
An elastic member for pressing the fuel rods, such as a lantern spring, is bound and compressed in advance to expand the space inside the cell.
Inserting the fuel rods into each of the cells, then immersing the nuclear fuel assembly in water or a solvent or heating it to a low temperature to melt or evaporate the binding material,
Since the above elastic member is activated,
During the fuel rod insertion process, since the cell internal space is expanded, there is almost no sliding contact between the fuel rod and the fuel rod pressing member, etc., and it is possible to prevent the occurrence of scratches on the fuel rod surface. Furthermore, after the assembly is completed, the binding material is removed by simply immersing the nuclear fuel assembly in a solvent, etc., so there is no need to untie the laces each time the assembly is completed, making it extremely easy to remove the binding material. It can be easily carried out and the manufacturing of nuclear fuel assemblies can be simplified.
第１図は核燃料集合体の縦断側面図、第２図は
スペーサの拡大平面図、第３図は第２図の−
線に沿う断面側面図、第４図は縛結材で縛結した
状態のランタンスプリングの側面図、第５図は上
記縛結したランタンスプリングを組込んだ状態を
示すスペーサの一部拡大平面図、第６図は燃料棒
を挿入した後上記ランタンスプリングの縛結を除
去した状態のスペーサの一部拡大平面図である。
４……燃料棒、６……スペーサ、１２……セ
ル、１３……ランタンスプリング、１３ａ……板
ばね部、１４……縛結材。
Figure 1 is a longitudinal side view of the nuclear fuel assembly, Figure 2 is an enlarged plan view of the spacer, and Figure 3 is the same as in Figure 2.
FIG. 4 is a side view of the lantern spring bound with a binding material; FIG. 5 is a partially enlarged plan view of the spacer showing a state in which the bound lantern spring is incorporated. FIG. 6 is a partially enlarged plan view of the spacer with the lantern springs removed after the fuel rods have been inserted. 4... Fuel rod, 6... Spacer, 12... Cell, 13... Lantern spring, 13a... Leaf spring portion, 14... Binding material.
Claims (1)
イダー等によつて形成され、少なくとも１つの燃
料棒押圧弾性部材を設けたセル内にそれぞれ燃料
棒を挿入し、各燃料棒の間隔保持を行なうように
した核燃料集合体の製造方法において、水または
溶剤に溶解するか或は低温度に加熱することによ
り燃焼、溶融または蒸発する縛結材によつて、予
め上記弾性部材を縛結圧縮してセル内空間を拡げ
ておいて、上記セル内にそれぞれ燃料棒を挿入
し、しかる後核燃料集合体を水または溶剤中に浸
漬するか低温度に加熱して上記縛結材を溶融また
は蒸発させ、前記弾性部材を作動状態にすること
を特徴とする、核燃料集合体の製造方法。 ２ 縛結材は、500℃以下の気中または真空中で
燃焼、溶融または蒸発する材料からなることを特
徴とする、特許請求の範囲第１項記載の核燃料集
合体の製造方法。 ３ 縛結材は、500℃以下の水または溶剤或は蒸
気中で溶解する材料からなることを特徴とする、
特許請求の範囲第１項記載の核燃料集合体の製造
方法。 ４ 縛結材は水溶性フイルムであることを特徴と
する、特許請求の範囲第１項記載の核燃料集合体
の製造方法。 ５ 縛結材はアルコールに溶解する化成フイルム
であることを特徴とする、特許請求の範囲第１項
記載の核燃料集合体の製造方法。[Claims] 1. Each fuel rod is inserted into a cell formed by bars, dividers, etc. arranged in a lattice pattern and provided with at least one fuel rod pressing elastic member, and each fuel rod is In a method for manufacturing a nuclear fuel assembly in which spacing is maintained, the elastic members are bound in advance by a binding material that is dissolved in water or a solvent, or burns, melts, or evaporates by heating to a low temperature. The space inside the cells is expanded by tying and compressing, and the fuel rods are inserted into each of the cells, and then the nuclear fuel assembly is immersed in water or a solvent or heated to a low temperature to melt the tying material. Alternatively, a method for manufacturing a nuclear fuel assembly, characterized in that the elastic member is brought into operation by evaporation. 2. The method for manufacturing a nuclear fuel assembly according to claim 1, wherein the binding material is made of a material that burns, melts, or evaporates in air or vacuum at a temperature of 500° C. or lower. 3. The binding material is characterized by being made of a material that dissolves in water, solvent, or steam at temperatures below 500°C.
A method for manufacturing a nuclear fuel assembly according to claim 1. 4. The method for manufacturing a nuclear fuel assembly according to claim 1, wherein the binding material is a water-soluble film. 5. The method for producing a nuclear fuel assembly according to claim 1, wherein the binding material is a chemical film that dissolves in alcohol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58223540A JPS60114795A (en) | 1983-11-28 | 1983-11-28 | Manufacture of nuclear fuel aggregate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58223540A JPS60114795A (en) | 1983-11-28 | 1983-11-28 | Manufacture of nuclear fuel aggregate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60114795A JPS60114795A (en) | 1985-06-21 |
| JPS6342239B2 true JPS6342239B2 (en) | 1988-08-22 |
Family
ID=16799758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58223540A Granted JPS60114795A (en) | 1983-11-28 | 1983-11-28 | Manufacture of nuclear fuel aggregate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60114795A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0427847U (en) * | 1990-06-28 | 1992-03-05 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11257597B2 (en) * | 2018-12-31 | 2022-02-22 | Global Nuclear Fuel—Americas, LLC | Systems and methods for debris-free nuclear component handling |
-
1983
- 1983-11-28 JP JP58223540A patent/JPS60114795A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0427847U (en) * | 1990-06-28 | 1992-03-05 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60114795A (en) | 1985-06-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR940004770B1 (en) | Nuclear fuel assemlby including a debris trap | |
| KR100982302B1 (en) | Debris Filtering Bottom Spacer Grid with Louvers for Preventing Fuel Rod Uplift | |
| KR100932436B1 (en) | Support grid with canoe-shaped spring to prevent fuel rod fretting wear | |
| US3715275A (en) | Bimetallic spacer grid arrangement | |
| KR101072381B1 (en) | Top nozzle assembly having improved hold down performance in a fuel assembly of a nuclear reactor | |
| US3192621A (en) | Fuel elements for nuclear reactors | |
| US5173252A (en) | Removable springs for ferrule spacer | |
| US3664924A (en) | Nuclear reactor spring ferrule spacer grid | |
| JPS6342239B2 (en) | ||
| JPS6349757Y2 (en) | ||
| KR102716922B1 (en) | Oil absorbent cloth containing feather | |
| JPS5985335A (en) | Manufacture of watch band | |
| JPS64636Y2 (en) | ||
| US3080616A (en) | Method of making fiber-clad storage battery plates | |
| JPH0622237Y2 (en) | Fuel assembly spacer | |
| TWI443681B (en) | Method for production of spacers for nuclear reactor | |
| JPS5952998B2 (en) | fuel rod | |
| JPS64679B2 (en) | ||
| JPS58179389A (en) | Nuclear fuel element | |
| JPH022114B2 (en) | ||
| JPS59231475A (en) | Aggregate of nuclear fuel | |
| JPS63241495A (en) | Method and device for assembling fuel body | |
| JPS64678B2 (en) | ||
| JPS60256086A (en) | Method of assembling fuel | |
| JPS62228970A (en) | Spacer of fuel aggregate for boiling water type reactor |