基本信息:
- 专利标题： 制造烧结活性的U3O8粉末的方法和使用该U3O8粉末生产核燃料芯块的方法
- 专利标题（英）：Mehtod of preparation of sintering activity U308 powder and production method of nuclear fuel pellet by using U308 powder
- 申请号：CN200710197130.9 申请日：2007-12-05
- 公开(公告)号：CN101197199B 公开(公告)日：2011-11-23
- 发明人： 梁宰豪 , 李荣雨 , 姜起远 , 金钟宪 , 金健湜 , 宋根禹
- 申请人： 韩国原子力研究所 , 韩国水力原子力株式会社
- 申请人地址： 韩国大田市
- 专利权人： 韩国原子力研究所,韩国水力原子力株式会社
- 当前专利权人： 韩电原子力燃料株式会社,韩国水力原子力株式会社
- 当前专利权人地址： 韩国大田市
- 代理机构： 中原信达知识产权代理有限责任公司
- 代理人： 梁晓广; 陆锦华
- 优先权： 10-2006-0122535 2006.12.05 KR
- 主分类号： G21C3/62
- IPC分类号： G21C3/62 ; G21C21/02 ; C01G43/025
There is provided a method of producing U3O8 powder having large surface area and small particle size by oxidizing defective UO2 pellets and manufacturing nuclear fuel pellets which are stable in a pore structure and high in density through the use of a mixture comprising UO2 powder and U3O8 powder. The method includes producing an U308 powder having a surface area of at least 1 m<2>/g by oxidizing defective UO2 pellets at a temperature of 300 to 370 DEG C in such a way that a maximum weight increase rate per 1g of the UO2 pellets is up to 0.06 wt %/min; producing a mixed powder by mixing the U3O8 powder with an UO2 powder by 2 to 15 wt %; producing a compact by compression molding the mixed powder; and sintering the compact in a reducing gas atmosphere at a temperature of 1600 to 1800 DEG C. In addition, a small amount of an Al-compound may be added to the oxidized U3O8 powder before the U3O8 powder is mixed with the UO2 powder. The additive such as Al is mixed with the U3O8 powder and then mixed with the UO2 powder to produce the pellets by a conventional production method. This ensures a stable pore structure, high density and a considerable increase in a crystal grain size.
公开/授权文献:
- CN101197199A 制造烧结活性的U3O8粉末的方法和使用该U3O8粉末生产核燃料芯块的方法 公开/授权日：2008-06-11
IPC结构图谱:
| G | 物理 |
| --G21 | 核物理；核工程 |
| ----G21C | 核反应堆 |
| ------G21C3/00 | 反应堆燃料元件及其组装；用作反应堆燃料元件的材料的选择 |
| --------G21C3/42 | .用于反应堆燃料的材料选择 |
| ----------G21C3/44 | ..流体或流动的反应堆燃料 |
| ------------G21C3/62 | ...陶质燃料 |