One- and Two-step Coagulation Treatment of Radioactive Wastes (in Japanese)
The removal of long-life fission-products, especially Cs137, Sr90, and Ru106, was studied using jar-testers and slurry recirculation type flocculators. Bentonite-polyelectrolyte coagulation was found moat effective for Cs137 removal, phosphate coagulation for Sr90 removal, and sulfide coagulation for Ru106 removal. All cogualants employed removed Ce144 and Zr95. Removal of contaminants from mixtures of Cs137 , Sr90, and Ru106 improved by two-step coagulation with a combination of benterite-polyelectrolyte and a phosphate and/or sulfide. Phosphate coagulation followed by benterite-polyelectrolyte coagulation gave best results. The slurry recirculation type flocculator removed contaminants using smaller quantities of chemicals than the jartester. Various processes were applied to reduce the volume of sludge produced by coagulation, and a freezing treatment was found to reduce the volume to 1% or less of the original waste volume.
- Research Organization:
- Japan Atomic Energy Research Inst., Tokyo
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-15-024622
- OSTI ID:
- 4024912
- Journal Information:
- Nippon Genshiryoku Gakkai-Shi, Journal Name: Nippon Genshiryoku Gakkai-Shi Journal Issue: 5 Vol. 3; ISSN 0004-7120
- Country of Publication:
- Country unknown/Code not available
- Language:
- Japanese
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