On the chemisorption of Cs onto stainless steel structural material

Yamashita, Shinichiro ; Miwa, Shuhei ; Osaka, Masahiko ; Nagase, Fumihisa

Cesium (Cs) chemisorption behavior onto stainless steel (SS) structural materials under LWR severe accident conditions was investigated by means of a chemical equilibrium calculation. Two categories of compounds formed by the Cs-chemisorption onto the SS were identified by a literature review, i.e. Cs-Cr-O and Cs-Si-O system compounds. The chemical stability of Cs-including compounds was evaluated by a chemical equilibrium calculation as a function of oxygen potential. Results showed that Cs-Si-O compounds were stable under a wide range of oxygen potential, while Cs-Cr-O was formed under a limited range. It was also shown that B inclusion might suppress the formation of Cs-Si-O compounds by a formation of Cs-B-O vapor.

Language	:	English
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Meeting title	:	Nuclear Materials Conference 2014 (NuMat 2014)
Held date	:	2014/10
Location (city)	:	Clearwater
Location (country)	:	U.S.A.
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Keywords	:	Cesium; Chemisorption; Severe accident; Fukushima Daiichi Nuclear Power Station Accident; 福島第一原子力発電所事故
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Registration No. : BB20142217
JAEA Abstracts No. :
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