Title:
ABSORBING METHOD OF IRRADIATION GROWTH IN FUEL ASSEMBLY FOR BOILING WATER REACTOR
Document Type and Number:
Japanese Patent JPH05333179
Kind Code:
A
Abstract:
PURPOSE: To properly absorb irradiation growth in response to the dispersion of the irradiation growth caused by the high burnup in a fuel assembly for a boiling water reactor.
CONSTITUTION: The upper end plug 2 of another fuel rod 1 is slidably inserted into the boss 4a of an upper tie plate 4 fixed to a tie rod 1a to form an absorption margin S for the irradiation growth in a fuel assembly for a boiling water reactor, and the absorption margin S for the inner fuel rod 1c is made larger as required than that of the outer fuel rod 1b within the fuel rods arranged into a square matrix, or/and the drop clearance from the upper tie plate of the upper end plug 2 of the outer fuel rod 1b is made larger than that of the inner fuel rod 1c.
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Inventors:
ITAGAKI NOBORU
Application Number:
JP17018392A
Publication Date:
December 17, 1993
Filing Date:
June 03, 1992
Export Citation:
Assignee:
NUCLEAR FUEL IND LTD
International Classes:
G21C3/33; (IPC1-7): G21C3/33
Attorney, Agent or Firm:
Taiichi Miyamoto