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Report No.

Research and development on the melting test of low-level radioactive miscellaneous solid waste

Nakashio, Nobuyuki; Kameo, Yutaka ; Hoshi, Akiko ; Nakashima, Mikio

The Nuclear Science Research Institute of the Japan Atomic Energy Agency constructed the Advanced Volume Reduction Facilities (AVRF) in February 2003 for treatment of low-level radioactive miscellaneous solid waste (LLW). The waste volume reduction is carried out by a high-compaction process or melting processes in the AVRF. In advance of operating the melting process in the AVRF, melting tests of simulated LLW with RI tracers ($$^{60}$$Co, $$^{137}$$Cs and $$^{152}$$Eu) have been conducted by using the plasma melter in pilot scale. Viscosity of molten waste, chemical composition and physical properties of solidified products and distribution of the tracers in each product were investigated in various melting conditions. In this review, experimental results of the melting tests were discussed in order to contribute to actual treatment of LLW in the AVRF.



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