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Report No.

Method for separation of Cs from acid solution dissolving radionuclides and microanalysis of solution with ICP-AES

Kanazawa, Toru*; Hidaka, Akihide   ; Kudo, Tamotsu ; Nakamura, Takehiko* ; Fuketa, Toyoshi

As a part of release evaluation in VEGA program, the mass balances of released and deposited FP onto the test apparatus are estimated from gamma ray measurement for acid solution leached from the apparatus, but short-life or radionuclides without emitting $$gamma$$ rays and very small quantity of elements cannot be quantified. Therefore, a microanalysis by ICP-AES is planed for acid solution leached from apparatuses. Since Cs have strong $$gamma$$ ray spectrum, they have to be removed from solution in advance to avoid contamination of ICP system and to decrease exposure to $$gamma$$ ray. The method for Cs separation using inorganic ion exchanger, AMP was applied to the test solutions. The results showed that more than 99.9% of Cs could be removed from test solution, and once removed Sb by AMP was recovered by using a complexing agent such as citric acid. The ICP-AES analysis showed that amount of U, Sr and Zr were successfully quantified. The release and deposition will be quantified through ICP-AES analysis for acid solutions from which Cs is separated by AMP or other precipitation method.



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