Advanced orient cycle, toward realizing intensified transmutation and utilization of radioactive wastes
- Japan Atomic Energy Agency (Japan)
- Tokyo Institute of Technology (Japan)
- Toshiba Corporation (Japan)
- Tohoku University (Japan)
To minimize the ecological burden originating in nuclear fuel recycling, a new R and D strategy, Adv.- ORIENT (Advanced Optimization by Recycling Instructive Elements) cycle, was set forth. In this context, mutual separation of f-elements, such as minor actinide (MA)/lanthanide (Ln) and Am/Cm, are essential to enhance the MA (particularly {sup 241}Am) burning. Isotope separation before transmutation is inevitably required in the case of some long-lived fission products (LLFPs) like {sup 126}Sn, {sup 135}Cs, etc. The separation and utilization of rare metal fission products (RMFPs: Ru, Rh, Pd, Tc, Se, Te, etc.) can offer a new direction in the partitioning and transmutation (P and T) field. Separation of exothermic nuclides {sup 90}Sr, {sup 137}Cs as well as MA will significantly help to mitigate the repository tasks. A key separation tool is ion exchange chromatography (IXC) by a tertiary pyridine resin having soft donor nitrogen atoms. This method has provided individual recovery of pure Am and Cm products with a Pu/U/Np fraction from irradiated fuel in just a 3-step separation. A catalytic electrolytic extraction (CEE) method by Pd{sub adatom} has been employed to separate, purify and fabricate RMFP catalysts. High separation efficiency of RMFP proved hydrochloric acid as a suitable media for their recovery. Different functioned ion exchangers, e.g., ammonium molybdophosphate (AMP), have been investigated for the separation of Cs{sup +}. Theoretical and laboratory studies on the isotope separation of LLFPs were begun for {sup 79}Se, {sup 126}Sn and {sup 135}Cs. (authors)
- Research Organization:
- American Nuclear Society, 555 North Kensington Avenue, La Grange Park, IL 60526 (United States)
- OSTI ID:
- 20979579
- Resource Relation:
- Conference: Advanced nuclear fuel cycles and systems (GLOBAL 2007), Boise - Idaho (United States), 9-13 Sep 2007; Other Information: Country of input: France; 22 refs; Related Information: In: Proceedings of GLOBAL 2007 conference on advanced nuclear fuel cycles and systems, 1873 pages.
- Country of Publication:
- United States
- Language:
- English
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