Method for preparing fuel pellet from uranium-molybdenum powder

The invention belongs to the nuclear industry and can be used for preparing a fuel pellet from uranium-molybdenum metal powder, and the metal powder is enriched to 7% by uranium-235 and can be used for a fuel element of a nuclear reactor. The pellet sintering is carried out in an inert argon atmosph...

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Main Authors LISIKOV ALEKSANDR VLADIMIROVICH, MIKHEEV EVGENY NIKOLAEVICH, KARPYUK, LEONID ALEKSANDROVICH, MISOLIN DENIS SERGEEVICH, NOVIKOV VLADIMIR VLADIMIROVICH, SHIPUNOV NIKOLAI IVANOVICH, SIVOV ROMAN BORISOVICH
Format Patent
LanguageChinese
English
Published 07.03.2023
Subjects
NUCLEAR ENGINEERING
NUCLEAR PHYSICS
NUCLEAR REACTORS
PHYSICS
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Summary:The invention belongs to the nuclear industry and can be used for preparing a fuel pellet from uranium-molybdenum metal powder, and the metal powder is enriched to 7% by uranium-235 and can be used for a fuel element of a nuclear reactor. The pellet sintering is carried out in an inert argon atmosphere at a temperature ranging from 1100 DEG C to 1155 DEG C. As initial powder, a particle size of 160 [mu] m and a molybdenum content of 9.0 to 10.5 wt.% are used. The powder is preheated at a temperature of 500 DEG C for 10-20 hours (in an argon medium) and then cold pressed into pellets in a mold at a pressure of up to 950 MPa. According to another method, when a uranium molybdenum pellet is prepared using a binder (plasticizer), the pellet is heated in argon from 300 DEG C to 450 DEG C prior to sintering for a period of 2-4 hours to remove the binder. The invention allows for increasing the uranium content in the fuel, reducing the heat accumulated in the nuclear reactor core, and reducing the energy release in
Bibliography:Application Number: CN202080101755