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Patent Searching and Data


Title:
使用済み核燃料から稀土類を除去する方法
Document Type and Number:
Japanese Patent JP3916663
Kind Code:
B2
Abstract:
The present invention relates to a process for removing rare earth elements (RE) from spent nuclear fuel. The spent nuclear fuel is subjected to an oxidation step at a temperature of between about 200 DEG to about 800 DEG C. and a heating step at a temperature of between about 1000 DEG C. to about 1600 DEG C. The process results in the segregation of the spent fuel into a rare earth-rich fluorite-type phase and a rare earth-poor U3O8 phase. The RE-rich fluorite type phase is separated from the RE-poor U3O8 phase by conventional separation techniques such as sieving, air classification, sedimentation and the like.

Inventors:
Taylor, peter
Macea Charan, Roderick Joseph
Application Number:
JP53441596A
Publication Date:
May 16, 2007
Filing Date:
May 14, 1996
Export Citation:
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Assignee:
Atomic Energy of Canada Limited
International Classes:
G21C19/44; G21C19/46; C22B60/02; G21C19/48; G21F9/06; G21F9/28
Domestic Patent References:
JP57023897A
JP3123896A
JP58124998A
Attorney, Agent or Firm:
Hideto Asamura
Hajime Asamura
Sadafumi Kobori
Yukihiro Ikeda