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Application of phosphate modified CAC for incorporation of simulated secondary aqueous wastes in Fukushima Daiichi NPP, 2; Leaching test of simulated wasteforms with reduced water content

Garcia-Lodeiro, I.*; Irisawa, Keita  ; Lebon, R.*; Mahoney, D.*; Zhang, B.*; Taniguchi, Takumi ; Namiki, Masahiro*; Osugi, Takeshi ; Meguro, Yoshihiro  ; Kinoshita, Hajime*

Calcium aluminate cements modified with phosphate (CAP) have been studied as an alternative matrix for the encapsulation of aqueous secondary wastes arising from processing of contaminated waster in Fukushima Daiichi Nuclear Power Plant. The present study focuses on the immobilisation of Sr and the other elements present in the simulated wastes in the CAP cements. As a result, CAP has a great potential as a host matrix for aqueous secondary wastes currently stored in Fukushima. It was possible to incorporate the simulated secondary wastes and form stable solids that can retain Sr under exposure to water.

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