Published November 22, 1991 | Version v1
Patent Metadata-only

Fuel assembly and nuclear reactor

Creators

Description

The present invention concerns a fuel assembly filled with uranium/plutonium mixed fuels arranged densely in a light water cooled and light water moderated reactor. In a BWR type reactor, for example, the void coefficient of coolants flowing upward along the axial direction of a fuel assembly is higher at the downstream. Accordingly, fuels of lower plutonium enrichment degree than that in the upstream region are used in the downstream region of the coolant of higher average void coefficient of burning. Increase of the void coefficient due to high void coefficient is suppressed by using fuels of low enrichment degree. Since the void coefficient of the reactor core is kept low, the void coefficient can be improved with no decrease in reactivity. (T.M.)

Availability note (English)

Available from JAPIO. Also available from INPADOC.

Additional details

Publishing Information

Imprint Pagination
9 p.
IPC:
Int. Cl. G21C3/328; G21C3/62.
IPC
Int. Cl. G21C3/328; G21C3/62.
Patent number
JP patent document 3-262993/A/

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
23059244
Subject category
S22: GENERAL STUDIES OF NUCLEAR REACTORS;
Resource subtype / Literary indicator
Non-conventional Literature
Descriptors DEI
CONFIGURATION; COOLANTS; DISTRIBUTION; FLUID FLOW; FUEL ASSEMBLIES; GROUTING; MIXED OXIDE FUELS; QUANTITY RATIO; VOID COEFFICIENT
Descriptors DEC
ENERGY SOURCES; FUELS; MATERIALS; NUCLEAR FUELS; REACTIVITY COEFFICIENTS; REACTOR MATERIALS; SOLID FUELS

Optional Information

Secondary number(s)
JP patent application 2-61013.