Published April 11, 1981 | Version v1
Patent Metadata-only

Fuel assemblies for BWR type reactors

Creators

Description

Purpose: To suppress the maximum value of the power distribution in fuel assemblies by charging fuel rods having uranium 235 concentration and burnable poison content different from each other appropriately to each of the regions. Constitution: Fuel assemblies are arranged on four sides of a control rod in a cross-like cross section. Fuel rods and water rods are disposed within a channel box. The fuel rods and the water rods are supported at the both ends by upper tie plates and lower tie plates respectively and supported at the intermediate portions by spacers at an appropriate interval. The fuel rods are dispersed in 1st - 11th regions, in which the uranium 235 concentration and the burnable poison content in each of the regions are properly determined. (Horiuchi, T.)

Availability note (English)

Available from JAPATIC. Also available from INPADOC.

Additional details

Publishing Information

Imprint Pagination
9 p.
IPC:
Int. Cl. G21C3/30; G21C1/08.
IPC
Int. Cl. G21C3/30; G21C1/08.
Patent number
JP patent document 56-37589/A/

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
13675799
Subject category
S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
Resource subtype / Literary indicator
Non-conventional Literature
Descriptors DEI
BURNABLE POISONS; BWR TYPE REACTORS; CONFIGURATION; CONTROL ELEMENTS; FUEL ASSEMBLIES; NEUTRON FLUX FLATTENING; ORIENTATION; POWER DISTRIBUTION; SPACERS; URANIUM 235
Descriptors DEC
ACTINIDE NUCLEI; ALPHA DECAY RADIOISOTOPES; EVEN-ODD NUCLEI; HEAVY NUCLEI; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; MINUTES LIVING RADIOISOTOPES; NEUTRON ABSORBERS; NUCLEAR POISONS; NUCLEI; RADIOISOTOPES; REACTOR COMPONENTS; REACTOR MATERIALS; REACTORS; URANIUM ISOTOPES; WATER COOLED REACTORS; WATER MODERATED REACTORS; YEARS LIVING RADIOISOTOPES