1996 年 38 巻 9 号 p. 760-770
All experiments planned in the JASPER, Japanese-American Shielding Program for Experimental Research, had been conducted between 1986 and 1992 under the cooperation between the U.S. Department of Energy and Power Reactor and Nuclear Fuel Development Corporation of Japan to obtain useful information on FBR shielding analysis accuracy. Tower Shielding Facility (TSF) of Oak Ridge National Laboratory was utilized for all the measurements. Results obtained from the post-experimental analyses are summarized in this report. Both characteristics for bulk shielding attenuation and streaming of neutron through configurations consisting of several materials including boron-carbide (B4C), graphite, stainless steel, sodium and etc. were clarified and the analysis accuracy confirmed. Prediction accuracy in both shielding property for configuration containing fissile material and sodium activation characteristics was confirmed. The shielding analysis system for fast reactors using a 2-dimensional discrete ordinates code as a standard has been improved and verified. Through those activities, useful information to be utilized in designing large FBR is accumulated.