Recent activities for accelerator driven system in JAEA

Sugawara, Takanori  ; Nishihara, Kenji  ; Sasa, Toshinobu   ; Oigawa, Hiroyuki 

In Japan Atomic Energy Agency (JAEA), various R&D for 800 MWt, lead bismuth eutectic (LBE) cooled ADS have been performed to transmute minor actinides (MA) discharged from spent fuel of commercial nuclear power plants. This study introduces the latest two activities for the ADS in JAEA. The first one is the uncertainty analysis for the subcritical core. Since uncertainties of the current MA nuclear data are supposed to be larger than those of other nuclides, it is necessary to improve the accuracy of the neutronics design. We discuss the effect of MA-loaded experiments for its improvement by using the cross-section adjustment procedure. The second activity is the structural analysis of the beam window. The discussions for the feasible concept are performed by using Finite Element Method.