Published June 4, 1980 | Version v1
Patent Open

Process to produce homogenized reactor fuels

Creators

Description

The fuels consist of a mixture of PuO2 and UO2. In order to increase the homogeneity of mechanically mixed fuels the pellets are sintered in a hydrogen atmosphere with a sufficiently low oxygen potential. This results in a reduction of Pu+4 to Pu+3. By the reduction process water vapor is obtained increasing the pressure within the PuO2 particles and causing PuO2 to be pressed into the uranium oxide structure. (DG)

Availability note (English)

MF available from INIS under the Report Number; Available from Deutsches Patentamt, Muenchen (Germany, F.R.).

Abstract (German)

Die Brennstoffe bestehen aus einem Gemisch aus PuO2 und UO2. Um die Homogenitaet mechanisch vermischter Brennstoffe zu erhoehen, wird eine Sinterung der Brennstoffpillen in einer Wasserstoffatmosphaere mit hinreichend niedrigem Sauerstoffpotential durchgefuehrt. Hierbei wird Pu+4 zu Pu+3 reduziert. Dieser Reduktionsvorgang ergibt Wasserdampf, der den Druck innerhalb der PuO2-Teilchen steigert und bewirkt, dass PuO2 in das Uranoxidgefuege gepresst wird. (DG)

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Additional details

Additional titles

Original title (German)
Verfahren zur Herstellung homogenisierter Kernreaktor-Brennstoffe

Publishing Information

Imprint Pagination
24 p.
IPC:
Int. Cl. G21C 3/58.
IPC
Int. Cl. G21C 3/58.
Patent number
DE patent document 2947375/A/

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
14745375
Subject category
S11: NUCLEAR FUEL CYCLE AND FUEL MATERIALS;
Descriptors DEI
FABRICATION; FUEL ELEMENTS; HOMOGENEOUS MIXTURES; MIXED OXIDE FUELS; NUCLEAR FUELS; PLUTONIUM OXIDES; REDUCTION; URANIUM OXIDES
Descriptors DEC
ACTINIDE COMPOUNDS; CHALCOGENIDES; CHEMICAL REACTIONS; DISPERSIONS; ENERGY SOURCES; FUELS; MATERIALS; MIXTURES; OXIDES; OXYGEN COMPOUNDS; PLUTONIUM COMPOUNDS; REACTOR COMPONENTS; REACTOR MATERIALS; SOLID FUELS; TRANSURANIUM COMPOUNDS; URANIUM COMPOUNDS