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Report No.

Thermochemical investigation of calcium silicate insulation with cesium hydroxide

Rizaal, M.   ; Nakajima, Kunihisa  ; Osaka, Masahiko  ; Saito, Takumi*; Erkan, N.*; Okamoto, Koji*

Experimental study using thermogravimetry and X-ray diffractometry was conducted to investigate chemical interaction between calcium silicate insulation and cesium hydroxide under steam and hydrogen atmospheres. This interaction might be one of the causes for the high dose rate reading outside the pedestal in 1F, Unit2. Our results suggested that some chemical interaction occurred in temperature range of 575-730$$^{circ}$$C regardless of atmospheres.



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