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

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.

Language	:	English
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Meeting title	:	日本原子力学会2022年春の年会
Held date	:	2022/03
Location (city)	:	神戸(online)
Location (country)	:	日本
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Keywords	:	Cesium; Chemical Interaction; CsAlSiO $_{4}$ ; shield plug; Fukushima Daiichi Nuclear Power Station Accident; Concrete; 福島第一原子力発電所事故
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Registration No. : BB20211223
JAEA Abstracts No. :
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