[1I07-12] FP behavior

[1I10] Fundamental Research on Fission Product Chemistry

(4)Chemical state of adsorbed Cesium under LWR severe accident studied by hard X-ray photoelectron spectroscopy

*Masaaki Kobata¹, Tetsuo Okane¹, Keisuke Kobayashi¹, Kenji Ohwada², Kunihisa Nakajima¹, Eriko Suzuki¹, Masahiko Osaka¹ (1. Japan Atomic Energy Agency, 2. National Institutes for Quantum and Radiological Science and Technology)

Keywords:hard X-ray photoelectron spectroscopy, LWR severe accident, Chemical state, Cesium

To understand the chemisorption behavior of Cesium (Cs) under an LWR severe accident, we have studied the Cs chemisorbed surfaces of the simulation samples (stainless steel) by hard X-ray photoelectron spectroscopy(HAXPES). It was found that the chemical states of Cs adsorbed on the sample surface were varied in dependence upon a silicon concentration of sample.