JPH0454490A - Separator for fuel transportation - Google Patents
Separator for fuel transportationInfo
- Publication number
- JPH0454490A JPH0454490A JP2162906A JP16290690A JPH0454490A JP H0454490 A JPH0454490 A JP H0454490A JP 2162906 A JP2162906 A JP 2162906A JP 16290690 A JP16290690 A JP 16290690A JP H0454490 A JPH0454490 A JP H0454490A
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- flat plate
- separator
- heat
- fuel 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.)
- Pending
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 89
- 229910052751 metal Inorganic materials 0.000 claims abstract description 12
- 239000002184 metal Substances 0.000 claims abstract description 12
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 4
- 239000000057 synthetic resin Substances 0.000 claims abstract description 4
- 125000006850 spacer group Chemical group 0.000 claims description 4
- 229920005989 resin Polymers 0.000 abstract description 5
- 239000011347 resin Substances 0.000 abstract description 5
- 239000004642 Polyimide Substances 0.000 abstract description 2
- 229910001026 inconel Inorganic materials 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 229920001721 polyimide Polymers 0.000 abstract description 2
- 229920006015 heat resistant resin Polymers 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 230000000712 assembly Effects 0.000 description 4
- 238000000429 assembly Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 229910052778 Plutonium Inorganic materials 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229910052770 Uranium Inorganic materials 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- OYEHPCDNVJXUIW-UHFFFAOYSA-N plutonium atom Chemical compound [Pu] OYEHPCDNVJXUIW-UHFFFAOYSA-N 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 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
- Fuel Cell (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の目的〕
（産業上の利用分野）
本発明は燃料集合体を輸送する際の梱包時に使用するた
めの燃料輸送用セパレータに関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a fuel transport separator for use in packaging when transporting fuel assemblies.
（従来の技術）
沸騰水型原子炉に用いら九る代表的な燃料集合体を第８
図に示す。燃料集合体１は複数本の燃料棒５、燃料棒５
相互間の水平方向間隔を一定に保持するためのスペーサ
４、燃料棒５を支持する上部タイプレート２及び下部タ
イプレート３．この上部タイプレート２及び下部タイプ
レート３を結合する結合燃料棒６から構成されている。(Prior art) Typical fuel assemblies used in boiling water reactors are
As shown in the figure. The fuel assembly 1 includes a plurality of fuel rods 5, fuel rods 5
A spacer 4 for maintaining a constant horizontal spacing between them, an upper tie plate 2 and a lower tie plate 3 for supporting the fuel rods 5. It is composed of a combined fuel rod 6 that connects the upper tie plate 2 and the lower tie plate 3.
現在このような燃料集合体輸送時の梱包には、燃料棒の
振動によるフレッティングを防止するために、ポリエチ
レン製の燃料輸送用セパレータが用いられている。従来
のセパレータ７を第９図に斜視図で示し、燃料集合体へ
の装着状態を第１０図及び第１１図に示す。燃料輸送用
セパレータ７は格子状に配列された燃料棒５，５間に挿
入されるもので、燃料棒５に直接接触する突状支持部８
と、燃料棒５，５間に挿入され突状支持部８が圧力を受
は反力を生じる弾性平板９とから構成されている。Currently, polyethylene fuel transport separators are used in packaging for transporting such fuel assemblies in order to prevent fretting due to vibration of the fuel rods. A conventional separator 7 is shown in a perspective view in FIG. 9, and the state in which it is attached to a fuel assembly is shown in FIGS. 10 and 11. The fuel transport separator 7 is inserted between the fuel rods 5 arranged in a lattice pattern, and has a protruding support portion 8 that directly contacts the fuel rods 5.
and an elastic flat plate 9 which is inserted between the fuel rods 5, 5 and receives pressure from the protruding support portion 8 and generates a reaction force.
ばね性つまり弾性を有する平板９の反力が隣接する燃料
棒５に反力を加えることによって燃料棒５の振動を防ぐ
働きをする。The reaction force of the flat plate 9 having spring property, that is, elasticity, acts to prevent vibration of the fuel rods 5 by applying a reaction force to the adjacent fuel rods 5.
（発明が解決しようとする課題）
従来の燃料輸送用セパレータは発熱する燃料集合体の輸
送を考慮したものではない。従ってプルトニウムとウラ
ンの混合酸化物燃料のように、発熱し、燃料棒５の表面
が高温になる燃料集合体を輸送する際には、熱によって
燃料輸送用セパレータの持つ特性が大きく変化してしま
う。まず、熱によってセパレータ７の突状支持部８が融
解し、燃料棒３の表面に付着することが考えられる。ま
た、セパレータフの平板９が有する圧縮応力に対する反
力が減衰し、隣接する燃料棒５の振動を防止するのに十
分な反力が得られなくなる課題がある。(Problems to be Solved by the Invention) Conventional fuel transportation separators do not take into account transportation of fuel assemblies that generate heat. Therefore, when transporting a fuel assembly such as a mixed oxide fuel of plutonium and uranium that generates heat and the surface of the fuel rods 5 becomes hot, the characteristics of the fuel transport separator will change significantly due to the heat. . First, it is conceivable that the protruding support portion 8 of the separator 7 melts due to heat and adheres to the surface of the fuel rod 3. Further, there is a problem that the reaction force against the compressive stress of the flat plate 9 of the separator tuff is attenuated, making it impossible to obtain a reaction force sufficient to prevent vibrations of the adjacent fuel rods 5.
本発明は上記課題を解決するためになされたもので、燃
料棒５自体が発熱し、燃料棒５の表面が高温になった場
合でも、広い使用温度領域において、平板９の圧縮応力
に対する適度な反力が失われず、突状支持部８が融解し
て燃料棒５の表面に付着することもなく、さらに突状支
持部８が十分に柔らかく燃料棒５の表面に傷を付けずに
燃料集合体１の輸送時に燃料棒５の振動を防ぐことがで
きる燃料輸送用セパレータを提供することにある。The present invention has been made to solve the above problem, and even when the fuel rod 5 itself generates heat and the surface of the fuel rod 5 becomes high temperature, the flat plate 9 can maintain appropriate pressure against the compressive stress in a wide operating temperature range. The reaction force is not lost, the protruding support part 8 does not melt and adhere to the surface of the fuel rod 5, and the protruding support part 8 is soft enough to allow fuel assembly without damaging the surface of the fuel rod 5. An object of the present invention is to provide a separator for fuel transportation that can prevent vibration of fuel rods 5 during transportation of fuel rods 1.
（課題を解決するための手段）
本発明は複数本の燃料棒を格子状に配列し長手方向にほ
ぼ等間隔で配設した複数個のスペーサで前記燃料棒を結
束してなる燃料集合体の前記燃料棒間に平行な突状支持
部が両面に設けられた平板を挿入して前記各々の燃料棒
間を区分する燃料輸送用セパレータにおいて、前記平板
の少なくとも芯部材は弾性金属薄板で形成され、前記突
状支持部の少くとも表面部材は耐熱性樹脂で形成されて
いることを特徴とする。(Means for Solving the Problems) The present invention provides a fuel assembly formed by arranging a plurality of fuel rods in a lattice pattern and bundling the fuel rods with a plurality of spacers arranged at approximately equal intervals in the longitudinal direction. In the fuel transport separator that separates the fuel rods by inserting a flat plate having parallel protruding support parts on both sides between the fuel rods, at least a core member of the flat plate is formed of an elastic thin metal plate. , at least the surface member of the protruding support portion is formed of a heat-resistant resin.
（作 用）
上記のような構成にすると、平板を弾性金属薄板で形成
したので、広い温度領域にわたって、圧縮応力に対する
適度な反力が得られ、平板の表面に必要に応じてコーテ
ィングされた耐熱性樹脂によって燃料棒の表面を傷つけ
ない適度な硬度を得ながら燃料棒を保持して振動を防ぐ
。一方、燃料棒の表面が発熱しても燃料棒を支持する支
持部材が耐熱性のため溶融等で燃料棒の表面に付着する
ことはない。(Function) With the above configuration, since the flat plate is made of an elastic thin metal plate, an appropriate reaction force against compressive stress can be obtained over a wide temperature range, and the heat-resistant coating on the surface of the flat plate can be applied as needed. The flexible resin provides appropriate hardness to prevent damage to the surface of the fuel rod while holding the fuel rod and preventing vibration. On the other hand, even if the surface of the fuel rod generates heat, the support member that supports the fuel rod is heat resistant and will not melt or adhere to the surface of the fuel rod.
（実施例）
第１図から第７図を参照しながら本発明に係る燃料輸送
用セパレータの各々の実施例を説明する。(Example) Each example of the fuel transport separator according to the present invention will be described with reference to FIGS. 1 to 7.
第１図に示した第１の実施例におけるセパレータ１０は
芯部材として弾性を有する金属性平板１１と、この平板
１１の両面に形成された突状支持部１２と、この突状支
持部１２および平板１１の全面にわたって被覆した耐熱
性樹脂層１３とから構成されている。The separator 10 in the first embodiment shown in FIG. The heat-resistant resin layer 13 covers the entire surface of the flat plate 11.
平板１１としてはたとえばインコネル材を、耐熱性樹脂
層１３としてはたとえばポリイミド系の合成樹脂が使用
される。The flat plate 11 is made of, for example, Inconel material, and the heat-resistant resin layer 13 is made of, for example, a polyimide-based synthetic resin.
ここで、平板１１と突状支持部材１２としては弾力性を
有する金属で形成して高温時でも圧縮応力に対する適度
な反力を失わない役割を果している。Here, the flat plate 11 and the protruding support member 12 are made of elastic metal, and play the role of not losing an appropriate reaction force against compressive stress even at high temperatures.
耐熱性樹脂層１３は燃料棒５と接触するが、突状支持部
１２の硬度を適切に保ちながら高温時において燃料棒５
の表面に付着することがないようにしている。The heat-resistant resin layer 13 is in contact with the fuel rod 5, and the hardness of the protruding support portion 12 is maintained appropriately while the fuel rod 5 is in contact with the fuel rod 5 at high temperatures.
to prevent it from adhering to the surface.
しかして、第１の実施例におけるセパレータ１０は第１
０図および第１１図に示したように燃料集合体１に装着
することによって高温時の輸送においても燃料棒５の振
動を防止することができる。Therefore, the separator 10 in the first embodiment is
By attaching it to the fuel assembly 1 as shown in FIGS. 0 and 11, vibration of the fuel rod 5 can be prevented even during transportation at high temperatures.
第２図に示した第２の実施例におけるセパレータ１４は
弾性金属薄板Ｉ５の両面に凹凸面Ｉ６を形成してこの凹
凸面１６を突状支持部とし、金属薄板１５の表面に耐熱
性樹脂層１３をコティングしたことにある。The separator 14 in the second embodiment shown in FIG. 2 has an uneven surface I6 formed on both sides of an elastic thin metal plate I5, the uneven surface 16 is used as a protruding support part, and a heat-resistant resin layer is formed on the surface of the thin metal plate 15. This is due to the coating of 13.
この第２の実施例によれば金属薄板１５をプレス加工し
て一体的に凹凸面１６を形成することができるので製作
が容易になる効果がある他は第１の実施例と同様の作用
効果を奏する。According to this second embodiment, since the uneven surface 16 can be integrally formed by pressing the thin metal plate 15, the manufacturing is facilitated, and other effects are the same as those of the first embodiment. play.
第３図に示した第３の実施例では若干厚みを有する弾性
金属薄板１５の両面に直接耐熱性合成樹脂で形状した直
方体の角形突状支持部１７を取着してセパレータ１８を
構成している。In the third embodiment shown in FIG. 3, a separator 18 is constructed by directly attaching rectangular parallelepiped protruding supports 17 made of heat-resistant synthetic resin to both sides of a slightly thick elastic metal thin plate 15. There is.
この第３の実施例によれば加工がさらに容易になる他は
第１の実施例と同様の作用効果を奏する。The third embodiment provides the same effects as the first embodiment, except that processing becomes easier.
第４図に示した第４図の実施例は第３の実施例における
角形突状支持部１７の代りに半円柱形突状支持部１９を
使用してセパレータ２０を構成している他は第３の実施
例と同様である。The embodiment shown in FIG. 4 uses a semi-cylindrical protruding support part 19 instead of the rectangular protruding support part 17 in the third embodiment, except that the separator 20 is composed of a separator 20. This is similar to the third embodiment.
この実施例では燃料棒５に対する接触つまり当りが滑ら
かになり挿入、引抜き性が容易になる他は第３の実施例
と同様の作用効果を素する。This embodiment has the same functions and effects as the third embodiment, except that the contact with the fuel rod 5 is smooth and insertion and withdrawal are facilitated.
第５図に示した第５の実施例は若干厚みを有する弾性金
属薄板１５に角形突状支持部１７を取着し、金属薄板１
５の全面に耐熱性樹脂層１３を形成してセパレータ２１
を構成している。In the fifth embodiment shown in FIG.
A heat-resistant resin layer 13 is formed on the entire surface of the separator 21.
It consists of
この実施例では第３の実施例と同様の作用効果を奏する
他は表面が滑らかなことによって、ＩＭ料料金合体１対
する装着および取り外し時に燃料棒５を傷付けない効果
をさらに高めることができる。This embodiment has the same functions and effects as the third embodiment, and the smooth surface further enhances the effect of not damaging the fuel rods 5 during installation and removal from the IM fuel assembly 1.
第６図に示した第６の実施例では第１から第５までの実
施例におけるセパレータ１０．１４．１８．２０゜２１
のいずれか（（第６図および第７図ではセパレータ１０
で代表する）を燃料集合体１の燃料棒５の間隔に見合う
数だけ使用して耐熱性樹脂製コ字状枠体２２に取着した
例を示している。In the sixth embodiment shown in FIG. 6, the separators 10.14.18.20°21 in the first to fifth embodiments are
((In Figs. 6 and 7, the separator 10
The figure shows an example in which a number of fuel rods (represented by ) corresponding to the spacing between the fuel rods 5 of the fuel assembly 1 are used and attached to a U-shaped frame 22 made of heat-resistant resin.
セパレータ■０は燃料集合体ｌの幅の１７２の長さとし
、第７図に示したように２個１組として使用し、燃料集
合体１に装着する。The separators (20) have a length of 172 times the width of the fuel assembly (1), and are used in pairs as shown in FIG. 7 and attached to the fuel assembly (1).
この実施例によれば枠体２２を設けることによって燃料
集合体１を構成する外周の燃料棒５を外側からも押さえ
ることが可能になり、燃料集合体１の外周の燃料棒５の
輸送時の振動をさらに低減することができる。According to this embodiment, by providing the frame 22, it becomes possible to hold down the fuel rods 5 on the outer periphery of the fuel assembly 1 from the outside, so that when the fuel rods 5 on the outer periphery of the fuel assembly 1 are transported, Vibration can be further reduced.
また、セパレータ１０は数枚積層して使用することもで
き、この場合には装着および取り外し時に要する作業時
間が大幅に短縮され、作業員の放射線被曝の低減化がで
きる。Furthermore, several separators 10 can be used in a stacked manner. In this case, the working time required for mounting and removing the separators 10 can be significantly shortened, and the radiation exposure of workers can be reduced.
本発明によれば高温時においても、圧縮応力に対する反
力を失わず、融解して燃料棒に付着することもなく、燃
料棒に傷を付けない適度な硬度で燃料棒の振動を防ぐこ
とができる。したがって、燃料棒が高温になる場合でも
燃料集合体の振動によるフレッティングを防止すること
ができる。According to the present invention, even at high temperatures, the reaction force against compressive stress is not lost, the fuel rods do not melt and adhere to the fuel rods, and the vibration of the fuel rods can be prevented with an appropriate hardness that does not damage the fuel rods. can. Therefore, even when the fuel rods reach high temperatures, fretting due to vibration of the fuel assembly can be prevented.
第１図および第２図は本発明の第１および第２の実施例
をそれぞれ示す縦断面図、第３図から第５図は本発明の
第３から第５の実施例をそれぞれ示す斜視図、第６図は
本発明の第６の実施例を示す正面図、第７図は第６図に
おけるセパレータを燃料集合体内に装着した状態を一部
概略的に示す横断面図、第８図から第１１図は従来例を
説明するためのもので、第８図は燃料集合体を一部断面
図で側面図、第９図はセパレ〜りの斜視図、第１０図は
燃料集合体内にセパレータを装着した状態を示す横断面
図、第１１図は燃料棒間にセパレータが装着された状態
を示す斜視図である。
ｌ・・・燃料集合体 ２・・・上部タイプレー
ト３・・・下部タイプレート ４・・・スペーサ５・
・・燃料棒 ６・・・結合燃料棒７・・・
セパレータ（従来） ８，１２・・・突状支持部９．
１１・・・平板
１０．１４．１８，２０．２１・・・セパレータ（本発
明）Ｉ３・・・耐熱性樹脂層
１６・・・凹凸面
２２・・・枠体
Ｉ５・・・金属薄板
１７・・・角
代理人 弁理士 則 近 憲 佑
第
図
第
図
第
図
第
図
第
図
第
図1 and 2 are longitudinal cross-sectional views showing the first and second embodiments of the present invention, respectively, and FIGS. 3 to 5 are perspective views showing the third to fifth embodiments of the present invention, respectively. , FIG. 6 is a front view showing a sixth embodiment of the present invention, FIG. 7 is a cross-sectional view partially schematically showing a state in which the separator in FIG. 6 is installed in a fuel assembly, and FIG. Fig. 11 is for explaining a conventional example, Fig. 8 is a side view with a partial cross section of the fuel assembly, Fig. 9 is a perspective view of the separator, and Fig. 10 is a separator inside the fuel assembly. FIG. 11 is a cross-sectional view showing the state in which the fuel rods are installed, and FIG. 11 is a perspective view showing the state in which the separators are installed between the fuel rods. l...Fuel assembly 2...Upper tie plate 3...Lower tie plate 4...Spacer 5...
... Fuel rod 6 ... Combined fuel rod 7 ...
Separator (conventional) 8, 12... Protruding support portion 9.
11... Flat plate 10.14.18, 20.21... Separator (present invention) I3... Heat-resistant resin layer 16... Uneven surface 22... Frame I5... Metal thin plate 17... ...Kaku Agent Patent Attorney Noriyuki Chika Diagram Diagram Diagram Diagram Diagram Diagram Diagram
Claims (1)
で配設した複数個のスペーサで前記燃料棒を結束してな
る燃料集合体の前記燃料棒間に平行な突状支持部が両面
に設けられた平板を挿入して前記各々の燃料棒間を区分
する燃料輸送用セパレータにおいて、前記平板の少なく
とも芯部材は弾性金属薄板で形成され、前記突状支持部
の少なくとも表面部材は耐熱性樹脂で形成されているこ
とを特徴とする燃料輸送用セパレータ。A fuel assembly in which a plurality of fuel rods are arranged in a lattice pattern and bound together by a plurality of spacers arranged at approximately equal intervals in the longitudinal direction has protruding support portions parallel to each other between the fuel rods. In a fuel transportation separator that divides the fuel rods by inserting flat plates provided on both sides, at least a core member of the flat plate is formed of an elastic thin metal plate, and at least a surface member of the projecting support part is heat-resistant. A separator for fuel transportation, characterized in that it is made of a synthetic resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2162906A JPH0454490A (en) | 1990-06-22 | 1990-06-22 | Separator for fuel transportation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2162906A JPH0454490A (en) | 1990-06-22 | 1990-06-22 | Separator for fuel transportation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0454490A true JPH0454490A (en) | 1992-02-21 |
Family
ID=15763481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2162906A Pending JPH0454490A (en) | 1990-06-22 | 1990-06-22 | Separator for fuel transportation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0454490A (en) |
-
1990
- 1990-06-22 JP JP2162906A patent/JPH0454490A/en active Pending
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