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

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.