[2D15-21] FP Chemical Behavior

[2D18] FP chemistry in a high temperature region of LWR under a severe accident

(4)Thermodynamic property of cesium-silicates

*Eriko Suzuki¹, Kunihisa Nakajima¹, Shuhei Miwa¹, Masahiko Osaka¹, Yuji Ohishi², Hiroaki Muta², Ken Kurosaki² (1. JAEA, 2. Osaka Univ.)

Keywords:Cesium-silicates, Low temperature heat capacity, Entropy

Cesium-silicates were formed by Cs chemisorption onto stainless steel under LWR severe accident condition. To investigate thermodynamic property of the cesium-silicates, low temperature heat capacities of the cesium-silicates were measured. The heat capacity and entropy of Cs2Si4O9 at 298 K calculated by measurement data generally corresponded with estimated data by Neumann-kopp's law and previous report.