专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JPS6425093A MANUFACTURING METHOD OF OXIDE NUCLEAR FUEL BODY 失效
公开(公告)号：JPS6425093A
公开(公告)日：1989-01-27
申请号：JP17998687
申请日：1987-07-21
申请人： MITSUBISHI ATOMIC POWER IND
发明人： HARADA YUHEI , ASAMI KOJI
IPC分类号： G21C3/62
摘要： PURPOSE:To obtain nuclear fuel body whose fission product gas is less by preliminarily sintering oxide nuclear fuel pellets in the prescribed treating temperature and the H2 gas surrounding, further sintering it in the CO2 environment and reducing and heat-treating it in the H2 gas environment. CONSTITUTION:UO2+x powder of raw material is roughly shaped and granulated granulation powder in which lubricant such as stearic acid zinc is added is compressed into green pellets and the green pellets are charged into a pellet charging chamber 1 from the direction of an arrow mark 4. They are kept for an hour in the temperature of 1,400-1,600 deg.C in the H2 gas environment preliminary sintering area 5 of the chamber 1 to sinter preliminarily. Next, they are passed through a weir 7 by N2 gas curtain and sintered for about 8hr at the same temperature and in CO2 gas environment sintering area 2. Further, they are passed through the weir 7 by N2 gas curtain and heat-treated for about an hour at the same temperature and in H2 gas environment reducing area 6. They are cooled in a cooling and pellet take-out chamber 3, taken out and fed to next process.

IPRDB