Published August 22, 1985 | Version v1
Patent Open

Process for producing oxidic sintered nuclear fuel pellets

Creators

Description

Powdered UO2 with random properties in mixed with a powder containing rare earth oxide whose particles have a fluorite-type crystal lattice at least in a surface layer and/or will form this type of crystal lattice upon sintering. The mixture is compressed into pellets and sintered in a reducing gas atmosphere at 15000C to 17500C to obtain high-density sintered pellets. (orig./PW)

Availability note (English)

MF available from INIS under the Report Number.

Abstract (German)

Uran-Dioxid-Basispulver mit beliebigen Eigenschaften wird mit seltenerd-oxidhaltigem Pulver gemischt, dessen Partikel mindestens in einer Oberflaechenschicht ein Kristallgitter des Fluorittypus aufweisen und/oder beim Sintern bilden. Dieses wird zu Presslingen kompaktiert, die in einer reduzierend wirkenden Gasatmosphaere bei 15000C bis 17500C zu hochdichten Sinterkoerpern gesintert werden. (orig./PW)

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Additional details

Additional titles

Original title (German)
Verfahren zum Herstellen von oxidischen Kernbrennstoffsinterkoerpern

Publishing Information

Imprint Pagination
10 p.
IPC:
Int. Cl. G21C 3/62; C04B 35/51.
IPC
Int. Cl. G21C 3/62; C04B 35/51.
Patent number
DE patent document 3406084/A/

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
17038897
Subject category
S11: NUCLEAR FUEL CYCLE AND FUEL MATERIALS; S36: MATERIALS SCIENCE;
Descriptors DEI
ANNEALING; BINARY MIXTURES; CERAMICS; COMPACTING; CRYSTAL LATTICES; FUEL PELLETS; GADOLINIUM ADDITIONS; GADOLINIUM OXIDES; MIXING; NUCLEAR FUELS; PELLETIZING; POWDERS; QUANTITY RATIO; REDUCTION; SINTERING; SURFACE PROPERTIES; URANIUM DIOXIDE
Descriptors DEC
ACTINIDE COMPOUNDS; CHALCOGENIDES; CHEMICAL REACTIONS; CRYSTAL STRUCTURE; DISPERSIONS; ENERGY SOURCES; FABRICATION; FUELS; GADOLINIUM COMPOUNDS; HEAT TREATMENTS; MATERIALS; MIXTURES; MOLDING; OXIDES; OXYGEN COMPOUNDS; RARE EARTH ADDITIONS; RARE EARTH COMPOUNDS; REACTOR MATERIALS; URANIUM COMPOUNDS; URANIUM OXIDES