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

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

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.

Language	:	Japanese
Journal	:	Nihon Genshiryoku Gakkai Wabun Rombunshi
Volume	:	3
Number	:	4
Pages	:	p.354 - 362
Publication Year/Month	:	2004/12
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Paper URL	:	https://doi.org/10.3327/taesj2002.3.354
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Keywords	:	溶出試験; 溶融固化体; 低レベル放射性廃棄物; プラズマ溶融; 塩基度; 化学組成; 溶出層
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Registration No. : A20030580
JAEA Abstracts No. : 330111
Paper Submission No. : 21530

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