journal article·2023-11

Decontamination and solidification treatment on spent liquid scintillation cocktail

Sou Watanabe, Youko Takahatake, Hiromichi Ogi, Takeshi Osugi, Takumi Taniguchi, Junya Sato, Tsuyoshi Arai, Akihiko Kajinami

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Abstract

Treatment of spent scintillation cocktail generated by analysis of radioactivity is one of important tasks for management of nuclear laboratories. This study proposed a procedure consists of adsorption of radioactivity and solidification of residual liquid wastes, and fundamental performance of each step was experimentally tested. Batch-wise adsorption showed excellent adsorption performance of Ni onto silica-based adsorbent, and chelate reaction was suggested as the adsorption mechanism by EXAFS analysis. Alkaline activate material successfully solidified the liquid waste, and TG/DTA and XRD analyses revealed that the organic compounds exist inside the matrix. Only 1 % of the loaded organic compounds were leaked from the matrix by a leaching test, and most of the organic compounds should be stably kept inside the matrix.
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Research context

OpenAlex topics: Nuclear materials and radiation effects · Graphite, nuclear technology, radiation studies · Concrete and Cement Materials Research

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