Preparation of silver vanadate glass containing PbO or TeO2 for radioactive iodine immobilization

초록

In this study, iodine immobilization matrices were developed using PbO or TeO2 as additives in AgI-Ag2O-V2O5 glass systems. Excluding oxygen, iodine loading in the matrix was observed to be 32-36% by weight. The waste form was fabricated by melting at 800 C for 1 h. The normalized release of elements in the waste form was below the order of 10(-1) g/m(2), thereby confirming the immobilization of iodine and satisfying the USA regulation (< 2 g/m(2)). Iodine release was suppressed by the addition of PbO and TeO2; however, silver release was not as suppressed as effectively as iodine. This paper also discusses the structural factors affecting the chemical durability of the glass matrix.

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