CONCEPT OF OPTIMIZATION FOR GEOLOGIC DISPOSAL COMBINED WITH P-AND-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 (partit ioning, and burning and/or transmutation) treatment has the potential merits for improving the present geologic disposal scenario, and is di scussed 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 o f GSC than the current disposal scenario. The total cost for P&B/T tre atment with thermal and fast B/T reactors can be minimized by. the var iation of recycle period, and by the adjustment of out-core optimizati on and in-core optimization. The partitioning can be done by three plu s 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) th e selection of radio-nuclide with high mobility through deep geologic media, and (3) the grouping of MA (minor actinide) and LLFP (long-live d fission product) selected by the items (1) and (2). based on B/T cha racteristics and decay acceleration ratio of nuclear reactions. (C) 19 97 Published by Elsevier Science Ltd.