Development of an iodine immobilization technique by low temperature vitrification with BiPbO{sub 2}I
- JGC Corporation (Japan)
- Kyushu University (Japan)
- RWMC, Tokyo, 105-0001 (Japan)
This paper describes low temperature vitrification process with BiPbO{sub 2}I (BPI) as a promising immobilization technique in which Iodine-129 reacts with BiPbO{sub 2}NO{sub 3} (BPN) to form BPI, which is then solidified into a lead-boron-zinc glass matrix (PbO-B{sub 2}0{sub 3}-ZnO) using a low temperature vitrification process. Studies with EPMA, STEM-EDS and XRD found that iodine, lead and zinc were homogeneously dispersed in the waste form, and that there were no residual crystalline minerals in the amorphous glass matrix. Leaching tests conducted under typical geological disposal conditions show that iodine dissolves congruently with the BPI glass matrix in simulated seawater, whereas it dissolves incongruently in alkaline Ca(OH){sub 2} solutions. This is due to retention within an altered surface layer. (authors)
- Research Organization:
- American Society of Mechanical Engineers (ASME), Three Park Avenue, New York, NY 10016-5990 (United States); Technological Institute of the Royal Flemish Society of Engineers (TI-K VIV), Het Ingenieurshuis, Desguinlei 214, 2018 Antwerp (Belgium); Belgian Nuclear Society (BNS) - ASBL-VZW, c/o SCK-CEN, Avenue Hermann Debrouxlaan, 40 - B-1160 Brussels (Belgium)
- OSTI ID:
- 21156339
- Resource Relation:
- Conference: ICEM'07: 11. International Conference on Environmental Remediation and Radioactive Waste Management, Bruges (Belgium), 2-6 Sep 2007; Other Information: Country of input: France; 7 refs.; Proceedings may be ordered from ASME Order Department, 22 Law Drive, P.O. Box 2300, Fairfield, NJ 07007-2300 (United States)
- Country of Publication:
- United States
- Language:
- English
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