Published May 16, 1997 | Version v1
Patent Metadata-only

Manufacturing method of nuclear fuel particle

Creators

Description

Ammonium diuranate particles generated by an outside gelling method are heated in air at about 400degC to 800degC to remove a gelling aid such as polyvinyl alcohol thereby forming UO3 or U3O8 particles. The particles are heated/sintered in a slightly oxidative atmosphere. The slightly oxidizing atmosphere comprises an inert gas such as N2 having an oxygen concentration of from 10-3 to 5 x 102ppm or a CO/CO2 gas having the same oxygen concentration. The heating temperature is set to about 1000 to 1400degC. Then, they are heated in a reducing atmosphere containing hydrogen at about 1000 to 1400degC so as to determine the O/U ratio of UO3 or U3O8 particles to 2.0±0.05. Fuel particles having a large grain size for high burn-up degree to be used in a HTGR type reactor are thus formed by conducting a low temperature oxidation and reduction sintering method without adding U3O8. (I.N.)

Availability note (English)

Available from JAPIO. Also available from EPO.

Additional details

Publishing Information

Imprint Pagination
4 p.
IPC:
Int. Cl. G21C3/62; C01G43/01; G21C21/02.
IPC
Int. Cl. G21C3/62; C01G43/01; G21C21/02.
Patent number
JP patent document 9-127280/A/

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
28064631
Subject category
S22: GENERAL STUDIES OF NUCLEAR REACTORS;
Resource subtype / Literary indicator
Non-conventional Literature
Descriptors DEI
ADU; CONTROLLED ATMOSPHERES; FUEL PARTICLES; HEATING; PRODUCTION; SINTERING; TEMPERATURE RANGE; URANIUM OXIDES U3O8; URANIUM TRIOXIDE
Descriptors DEC
ACTINIDE COMPOUNDS; AMMONIUM COMPOUNDS; AMMONIUM URANATES; CHALCOGENIDES; FABRICATION; OXIDES; OXYGEN COMPOUNDS; URANATES; URANIUM COMPOUNDS; URANIUM OXIDES

Optional Information

Secondary number(s)
JP patent application 7-309955.