| 摘要 |
PURPOSE: To eliminate the need of complementary adjusting treatment, such as the milling, screening, granulation, etc., by treating the initial solution of a soluble salt of one or more elements with hydrogen peroxide and settling a peroxide suspended in a mother liquor. CONSTITUTION: The method for manufacturing nuclear fuel pellets is composed of a plurality of steps, and the method is started with the solution of a soluble salt of one or more metals or elements M for forming final sintered oxide pellets. A nitrate is specially preferable as the soluble salt and a peroxide is settled while the peroxide is suspended in a mother liquor by treating the solution of the nitrate with hydrogen peroxide and an ammonia solution. The solid is separated form the solution and washed and, thereafter, the obtained solid powder is calcined to an oxide and the oxide is reduced in a atmosphere containing hydrogen and nitrogen in a furnace. After all agglomerates formed during the heat treatment are removed from the reduced powder, green pellets are obtained by molding the powder with pressure and the pellets are sintered. The settled powder does not require any adjusting operations, such as the milling, particle size distribution adjusting operation, granulation, etc.
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