doi.org
A. I. Shirokov, Yu. A. Voroshilov, A. V. Konnikov — Radioactive Waste · This paper elaborates on a method providing the extraction of cesium-strontium fraction that has been refined and tested to support the implementation of the new Sustainable Nuclear Fuel Cycle product line. An extraction mixture based on the dicyclohexyl-18-crown-6 and dibenzo-21-crown-7 crown ethers in trihydrododecafluoroheptanol (n3 telomer alcohol) was applied. The test was conducted on a pilot unit using mixer-settler-type extractors fitted within a “hot” chamber at the RT-1 plant. Highly active PUREX raffinate generated from the reprocessing of spent nuclear fuel (SNF) from a WWER-1000 reactor unit was used as a feed solution. Approximately 7 dm3 of cesiumstrontium concentrate was produced in a continuous dynamic mode. The study demonstrates the high degree of the cesium-strontium (short-lived) fraction treatment from long-lived radionuclides.
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