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- W3165586214 abstract "In the present high burn-up strategy in Japan, the economic efficiency and reduction of the spent nuclear fuel have been in progress. On the other hand, in the further progress of the strategy, several issues may appear. The amount and activity of nuclides, heat generation, and radiation for a fuel pin in the typical 17x17 PWR assembly were calculated as functions of burn-up and cooling time, using the SWAT code system. Waste loading in glass waste forms from spent UO{sub 2} fuel and MOX fuel were discussed, assuming the number of glass canisters of 150 liter per THM is 1.25 at 45 GWd/THM. The number of glass canisters per GWd is almost constant in the range of burn-up up to 70 GWd/THM. The amount of molybdate from Pu-239 fissions linearly increases as a function of burn-up similarly like increase from U-235 fissions. The current vitrification technology may not face serious situation to be required substantial reduction in waste loading relating to molybdate up to 70 GWd/THM. The initial cooling period prior to vitrification, the waste loading and the interim storage period prior to final disposal are major factors which determine the way of storage and final disposal. The higher burn-up above 45 GWd/THM may require pretreatment of HLLW or substantial reduction in waste loading to retain the integrity of the ceramic melter for e.g. five years. Further promotion of high burn-up strategy should be consistent with nuclear fuel cycle including waste management. A potential approach, a conceptual new reprocessing system for thermal reactors is described. (author)" @default.
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- W3165586214 date "2005-07-01" @default.
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- W3165586214 title "Key issues in nuclear fuel cycle concerning high burn-up strategy" @default.
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