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Application of 70-mm-dia Centrifugal Contactors in Pilot Plant Tests of Two Simplified TRPO Processes with Simulated High Level Waste

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High level waste (HLW) produced from reprocessing of the spent nuclear fuel still contains actinides, 90Sr, 137Cs, etc., which presents a significant hazard to the environment. Two simplified TRPO processes for the partitioning of HLW were developed with N, N'-dimethyl-3-oxa-glutaramic acid (DMOGA) as the stripping agent at the Institute of Nuclear and New Energy Technology (INET), Tsinghua University, China. The cold pilot plant tests of two simplified TRPO processes were carried out with the simulated HLW respectively, where 70-mm-dia centrifugal contactors were used in the stripping sections of two simplified TRPO processes for the removal of actinides in the loaded 30% TRPO-kerosene. The test results showed that 99.9% of the Nd and 99.9% of the Zr were stripped respectively, and the organic phase was recycled after being stripped and scrubbed. During the pilot plant tests, all of the 70-mm-dia centrifugal contactors were stable, working continuously with no stage failure or interruption in operation. All of the results demonstrate that these centrifugal contactors are promising for the stripping sections of two simplified TRPO processes.

Keywords: Centrifugal contactor; high level waste; partitioning; pilot plant test; simplified TRPO process

Document Type: Research Article

DOI: http://dx.doi.org/10.1080/01496390903182131

Affiliations: Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, China

Publication date: January 1, 2009

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