Radionuclides behavior in melting process and its products of non-combustible solid waste by induction heat melting
In Japan, the second stage burial plan is under consideration, and this plan will mainly aim to bury non-combustible low level radioactive wastes. Candidate treatment methods are a direct cement solidification method, a compacting method, and a melting method. The authors examined the residual fraction of radionuclides, such as Cs-134 (instead of Cs-137), Co-60, Sr-85 (instead of Sr-90), at typical melting conditions for non-combustible waste at laboratory scale tests and mock-up scale tests. The authors also examined the distribution behavior of these nuclides, because melted products of non-combustible waste have a structure of the pile of one ceramic layer and one metal layer. Volatilized Co-60 and Sr-85 was not detected and approximately all the amount of Co-60 and Sr-85 was collected in melted products. Residual fraction of Cs-134 was in the range of 50 to 90% at laboratory scale tests, and about 50% at mock-up scale tests. For the distribution behavior, Co-60 was not detected in a ceramic layer, and Cs-134 and Sr-85 were not detected in a metal layer.
- OSTI ID:
- 220933
- Report Number(s):
- CONF-950917--; ISBN 0-7918-1219-7
- Country of Publication:
- United States
- Language:
- English
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