Concept of optimization for geologic disposal combined with P&B/T (partitioning, and burning and/or transmutation) treatment in self-completed fuel cycle

Abstract

Self-Completed Fuel Cycle combined with multiple-recycle P&B/T ( partitioning, and burning and/or transmutation) treatment has the potential merits for improving the present geologic disposal scenario, and is discussed herein based on three plus one criteria for partitioning. The number reduction of GSC ( glass solidified canister, i.e. waste package) is important concept to decrease the cost of geologic disposal. The cost needed for P&B/T treatment can be saved by the number reduction of GSC than the current disposal scenario. The total cost for P&B/T treatment with thermal and fast B/T reactors can be minimized by the variation of recycle period, and by the adjustment of out-core optimization and in-core optimization. The partitioning can be done by three plus one criteria, that is (1) the selection of long-lived radio-nuclide with high Hazard Index at 1,000 years after the fuel discharge, (2) the selection of radio-nuclide with high mobility through deep geologic media, and (3) the grouping of MA (minor actinide) and LLFP (long-lived fission product) selected by the items (1) and (2), based on B/T characteristics and decay acceleration ratio of nuclear reactions.