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Journal Articles

Chemical stability of solidified products made from incombustible wastes by plasma melting

Kameo, Yutaka; Haraga, Tomoko; Nakashio, Nobuyuki; Hoshi, Akiko; Nakashima, Mikio

Nihon Genshiryoku Gakkai Wabun Rombunshi, 3(4), p.354 - 362, 2004/12

https://doi.org/10.3327/taesj2002.3.354

In order to investigate chemical stability of solidified products made from Low Level Radioactive Wastes (LLW) by plasma melting, a leaching test based on the MCC (Material Characterization Center)-3S Agitated Powder Leach Test Method was performed to determine Normalized Elemental Mass Loss (NL $_{i}$ ) of both main components (Na, Al, Si, Ca, and Fe) of the solidified product and radioactive tracers ( $^{60}$ Co, $^{137}$ Cs, and $^{152}$ Eu) incorporated into it. The results of leaching test indicated that NLi value was greatly affected by basicity defined as weight ratio of CaO to SiO $_{2}$ in the solidified product, while effect of FeO concentration on NL $_{i}$ value was small. In the case of basicity less than 0.8, logarithm of NL $_{i}$ linearly increased with the basicity, implying that NL $_{i}$ value can be estimated by chemical composition of the solidified products.