Published January 12, 1988 | Version v1
Patent Metadata-only

Fuel assembly

Creators

  • 1. Nippon Atomic Industry Group Co. Ltd., Tokyo

Description

Purpose: To flatten the axial power distribution of a fuel assembly without complicating the enrichment degree or gadolinia distribution in a fuel rod. Constitution: The fuel assembly for use in BWR type reactor according to the present invention has such a shape that the amount of moderators is increased upwardly in which water rods disposed with water removing portions of small neutron absorbing cross section are disposed in the lower region. The water removing portions are filled with porous pellets sintered from ceramics to constitute a water-proof structure. Further, burnable poisons may be added to the water removing portion. This can flatten the axial power distribution without deteriorating the fuel integrity. (Takahashi, M.)

Availability note (English)

Available from JAPIO. Also available from INPADOC.

Additional details

Publishing Information

Imprint Pagination
7 p.
IPC:
Int. Cl. G21C3/32.
IPC
Int. Cl. G21C3/32.
Patent number
JP patent document 63-6494/A/

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
19089401
Subject category
S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
Resource subtype / Literary indicator
Non-conventional Literature
Descriptors DEI
BURNABLE POISONS; BWR TYPE REACTORS; CERAMICS; FUEL ASSEMBLIES; FUEL PELLETS; MODERATORS; NEUTRON ABSORBERS; POROUS MATERIALS; POWER DISTRIBUTION; SINTERING
Descriptors DEC
DISTRIBUTION; ENRICHED URANIUM REACTORS; FABRICATION; MATERIALS; NUCLEAR POISONS; POWER REACTORS; REACTOR MATERIALS; REACTORS; SPATIAL DISTRIBUTION; THERMAL REACTORS; WATER COOLED REACTORS; WATER MODERATED REACTORS

Optional Information

Secondary number(s)
JP patent application 61-148212.