Investigations on the partitioning of {sup 129}I from silver-impregnated silica in preparation for future transmutation
- Forschungszentrum Juelich GmbH (Germany). Inst. for Safety Research and Reactor Technology
According to the current state of the art in reprocessing technology, the {sup 129}I contained in spent fuel elements can be completely transferred to the dissolver off-gas and efficiently adsorbed on AgNO{sub 3}-impregnated silica (AC 6120). For future transmutation, the {sup 129}I should again be separated selectively and as completely as possible (>99%) from the AC 6120 adsorption matrix. Experimental studies show that a quantitative recovery of the iodine is possible by wet chemical and thermal processes. Extraction experiments using iodine-loaded AC 6120 with sodium sulfide solution provide recovery rates of 99 {+-} 1%. reduction with hydrogen at 500 C, in which gaseous HI was liberated, provided recovery rates of >99%. After the separation of iodine, the reduced AC 6120 can be used again as an adsorbent for molecular iodine.
- OSTI ID:
- 419732
- Journal Information:
- Nuclear Technology, Journal Name: Nuclear Technology Journal Issue: 1 Vol. 117; ISSN 0029-5450; ISSN NUTYBB
- Country of Publication:
- United States
- Language:
- English
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