JPS63139598U - - Google Patents
Info
- Publication number
- JPS63139598U JPS63139598U JP1987031857U JP3185787U JPS63139598U JP S63139598 U JPS63139598 U JP S63139598U JP 1987031857 U JP1987031857 U JP 1987031857U JP 3185787 U JP3185787 U JP 3185787U JP S63139598 U JPS63139598 U JP S63139598U
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- fuel rods
- rods
- portion corresponding
- tie plate
- 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 claims description 17
- 229910001093 Zr alloy Inorganic materials 0.000 claims 1
- 238000005253 cladding Methods 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 239000003758 nuclear fuel Substances 0.000 claims 1
- 125000006850 spacer group Chemical group 0.000 claims 1
- 238000010586 diagram 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)
Description
第１図は本発明の燃料集合体の一実施例の横断
面図、第２図は従来の燃料集合体の横断面図、第
３図はＢＷＲにおける各種燃料棒の高速中性子照
射量、又は、燃焼度と燃料棒軸方向伸び率との関
係を示す特性図、第４図は従来の燃料集合体に改
良を加えた燃料集合体の下部構造の横断面図、第
５図は本発明の下部タイプレートの斜視図、第６
図は本発明の一実施例の下部構造の横断面図であ
る。
１…下部タイプレート、１ａ…下部タイプレー
ト厚み増加部分、１ｂ…下部タイプレートの水平
格子部分。
FIG. 1 is a cross-sectional view of an embodiment of the fuel assembly of the present invention, FIG. 2 is a cross-sectional view of a conventional fuel assembly, and FIG. 3 is a fast neutron irradiation amount of various fuel rods in BWR, or A characteristic diagram showing the relationship between burnup and fuel rod axial elongation rate. Figure 4 is a cross-sectional view of the lower structure of a fuel assembly that has been improved from the conventional fuel assembly. Figure 5 is the lower part of the present invention. Perspective view of tie plate, No. 6
The figure is a cross-sectional view of a lower structure according to an embodiment of the present invention. 1...lower tie plate, 1a...lower tie plate increased thickness portion, 1b...horizontal grid portion of lower tie plate.
Claims (1)
分裂性物質を含み円柱状の焼結体よりなる核燃料
ベレツトが密封された複数本の燃料棒と、前記燃
料棒の軸方向の両端部側にそれぞれ設けられ、前
記燃料棒の上・下部端栓をそれぞれ挿入して前記
燃料棒を一定間隔に保持する上・下部タイプレー
トと、前記燃料棒の一部で前記上・下部タイプレ
ートに固定され、かつ、これら両者間を結合して
いるタイロツドと、前記燃料棒の相互の間隔を保
持するスペーサと、前記構成物を内包する筒状の
チヤンネルボツクスからなる燃料集合体において
、 前記下部タイプレートの水平格子部分における
前記燃料棒の配列最外周部に対応する部分の軸方
向厚みを前記燃料棒の配列内部に対応する部分の
厚みより、燃料バンドル方向に厚くしたことを特
徴とする燃料集合体。[Claims for Utility Model Registration] A plurality of fuel rods each having a nuclear fuel beret made of a cylindrical sintered body containing a fissile material sealed inside a cladding tube made of a zirconium alloy, and an axial direction of the fuel rods. Upper and lower tie plates are provided on both end sides of the fuel rods and hold the fuel rods at a constant interval by inserting the upper and lower end plugs of the fuel rods, respectively; A fuel assembly consisting of a tie rod fixed to a tie plate and connecting these two, a spacer that maintains a mutual spacing between the fuel rods, and a cylindrical channel box containing the components, The horizontal lattice portion of the lower tie plate is characterized in that the axial thickness of the portion corresponding to the outermost periphery of the fuel rod array is made thicker in the fuel bundle direction than the thickness of the portion corresponding to the inside of the fuel rod array. fuel assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987031857U JPS63139598U (en) | 1987-03-06 | 1987-03-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987031857U JPS63139598U (en) | 1987-03-06 | 1987-03-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63139598U true JPS63139598U (en) | 1988-09-14 |
Family
ID=30837978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987031857U Pending JPS63139598U (en) | 1987-03-06 | 1987-03-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63139598U (en) |
-
1987
- 1987-03-06 JP JP1987031857U patent/JPS63139598U/ja active Pending
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