Advanced orient cycle, toward realizing intensified transmutation and utlization of radioactive wastes

Masaki Ozawa, Shinichi Koyama, Tatsuya Suzuki, Reiko Fujita, Hitoshi Mimura, Yasuhiko Fujii

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)


To minimize the ecological burden originating in nuclear fuel recycling, a new R&D strategy, Adv.-ORIENT (Advanced Optimization by Recycling instructive Elemente) cycle, was set forth. In this context, mutual separation off-elements, such as minor actinide (MA)/lanthanide (Ln) and Am/Cm, are essential to enhance the MA (particularly 241Am) burning. Isotope separation before transmutation is inevitably required in the case of some long-lived fission products (LLFPs) like 126Sn, 133Cs, 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&T) field. Separation of exothermic nuclides 90Sr, 137Cs 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 Pdadatom 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+. Theoretical and laboratory studies on the isotope separation of LLFPs were begun for 79Se, 126Sn and 135Cs.

Original languageEnglish
Title of host publicationGLOBAL 2007
Subtitle of host publicationAdvanced Nuclear Fuel Cycles and Systems
Number of pages7
Publication statusPublished - 2007
Externally publishedYes
EventGLOBAL 2007: Advanced Nuclear Fuel Cycles and Systems - Boise, ID, United States
Duration: 2007 Sep 92007 Sep 13

Publication series

NameGLOBAL 2007: Advanced Nuclear Fuel Cycles and Systems


OtherGLOBAL 2007: Advanced Nuclear Fuel Cycles and Systems
Country/TerritoryUnited States
CityBoise, ID

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Fuel Technology
  • Nuclear Energy and Engineering


Dive into the research topics of 'Advanced orient cycle, toward realizing intensified transmutation and utlization of radioactive wastes'. Together they form a unique fingerprint.

Cite this