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Formation of Cs-compounds by chemical interaction of CsOH and concrete at various temperatures

高温における水酸化セシウムとコンクリートとの化学的相互作用によるセシウム化合物の生成

Luu, V. N. ; 中島 邦久  

Luu, V. N.; Nakajima, Kunihisa

To investigate the source of high dose rates at the concrete shield plugs of Unit 2 and 3 at 1F, high temperature tests on the mixture of CsOH and pulverized concrete/main components were conducted. Results showed that both water-soluble and -insoluble phases were formed below 300$$^{circ}$$C. Namely, Cs$$_{2}$$CO$$_{3}$$(H$$_{2}$$O)$$_{3}$$ was formed due to chemical reaction with CaCO$$_{3}$$ at room temperature. The authors will discuss the possibility that this might be one of the main trapping mechanisms on shield plugs.

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