Title:
上部ノズルのリーフスプリングの固定部ならびにその加工方法
Document Type and Number:
Japanese Patent JP3626429
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To shorten time for fabricating a square hole for installing a leaf spring and simplify installing and fixing of a leaf spring to upper nozzle. SOLUTION: In the fixing part A of the leaf spring at the upper part of a PWR nuclear fuel assembly, a groove of which the installation side of the leaf spring is open is machined to form a groove part 12 in the fixing part A by using a rotating tool at the prefabrication state. Then, a parallelepiped hole 7 having round deep corners is formed by also using the rotating tool.
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Inventors:
Sekiguchi Shoji
Kiyoshi Inoue
Kiyoshi Inoue
Application Number:
JP2001187461A
Publication Date:
March 09, 2005
Filing Date:
June 21, 2001
Export Citation:
Assignee:
Nuclear Fuel Industry Co., Ltd.
International Classes:
G21C21/00; G21C3/33; (IPC1-7): G21C3/33; G21C21/00
Domestic Patent References:
| JP3255390A | ||||
| JP63054094U |
Foreign References:
| US5267287 |
Attorney, Agent or Firm:
Taiichi Miyamoto