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Report No.
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Thermodynamic property of cesium-silicates

Suzuki, Eriko   ; Nakajima, Kunihisa  ; Osaka, Masahiko  ; Oishi, Yuji*; Muta, Hiroaki*; Kurosaki, Ken*

In LWR severe accident condition, Cesium(Cs)-silicates (CsFeSiO$$_{4}$$, Cs$$_{2}$$Si$$_{2}$$O$$_{5}$$, Cs$$_{2}$$Si$$_{4}$$O$$_{9}$$) could be formed by Cs chemisorption onto reactor structural materials. For evaluation of chemisorption/re-vaporization behaviour, thermal property of each Cesium-silicates were investigated by low temperature heat capacity measurement. As a result, actual measurement values of standard entropy, which have evaluated by estimate values, were obtained. Especially for Cs$$_{2}$$Si$$_{4}$$O$$_{9}$$, more reliable value of standard formation Gibbs energy was able to be evaluated.

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