Preparation method of SiC-based UCO core fuel pellet

The invention belongs to the technical field of SiC-based nuclear fuel pellet preparation, and particularly relates to a preparation method of a SiC-based UCO core fuel pellet. The preparation method comprises the following steps: slowly adding U3O8 powder into a mixed solution of concentrated nitri...

Full description

Saved in:
Bibliographic Details
Main Authors MENG YING, SUI ZHENG, GUO BOLONG, LIANG FANGZHI, ZHANG YU, LIU WENTAO, ZHANG JINGXUE
Format Patent
LanguageChinese
English
Published 30.04.2021
Subjects
NUCLEAR ENGINEERING
NUCLEAR PHYSICS
NUCLEAR REACTORS
PHYSICS
Online AccessGet full text

Cover

More Information
Summary:The invention belongs to the technical field of SiC-based nuclear fuel pellet preparation, and particularly relates to a preparation method of a SiC-based UCO core fuel pellet. The preparation method comprises the following steps: slowly adding U3O8 powder into a mixed solution of concentrated nitric acid and deionized water, preparing uranyl nitrate and urea into a thickening agent, adding the thickening agent into the mixed solution, standing, dispersing gel through a dispersing head to prepare UO3/C gel balls, aging, washing and drying to remove impurities and moisture, and finally roasting in a CO atmosphere to prepare UO2 + UC2 UCO microspheres; and uniformly mixing UCO coating particles prepared by fluidization coating with SiC powder, selecting a steel die to cold press the mixed powder into a green body, packaging the green body into a hot pressing die to carry out hot pressing sintering under vacuum, taking out the hot pressing die after sintering is finished to take out the pellet, and polishing the
Bibliography:Application Number: CN202011609611