Journal
PHYSICS OF ATOMIC NUCLEI
Volume 83, Issue 10, Pages 1396-1399Publisher
PLEIADES PUBLISHING INC
DOI: 10.1134/S1063778820100105
Keywords
reprocessing of nuclear fuel; actinides; nitrate solutions of actinides; organic reducing agents; microwave radiation; thermochemical reductive denitration; solid solutions of actinide oxides
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Funding
- GEOKHI RAS state assignment [0137-2019-0022]
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The use of microwave heating to produce solid solutions of actinide oxides in the processes of thermal denitration of model nitric acid solutions formed in reducing stripping schemes at the final stages of the PUREX process, containing U and Th (Pu simulator) and unreacted reducing agents (hydrazine, etc.), is proposed. As a result, after quantitative distilling of water vapor, acid, and volatile products into the collector, denitration reductive thermolysis of the concentrate (melt) of actinide nitrates containing 100% of a solid solution of oxides U(Th)O-2 takes place. The U-Th oxide powders obtained meet the regulatory requirements (TU 95414-2005) for ceramic powders.
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