PRE-EVALUATION OF FUSION SHIELDING BENCHMARK EXPERIMENT

A shielding benchmark experiment is very useful to test the design cod e and nuclear data for fusion devices. There are many types of benchma rk experiment that should be done in fusion shielding problems, but ti me and budget are limited. Therefore it will be important to select an d determine the effective experimental configurations by precalculatio n before the experiment. We did pre-evaluations of three types of shie lding benchmark experiment to determine the experimental assembly conf igurations. The types of experiment discussed are the void effect expe riment, the auxiliary shield experiment, and the SCM (superconductive magnet) nuclear heating experiment. These calculations were performed by using two-dimensional discrete ordinate transport code DOT3.5 with first collision source prepared by GRTUNCL code. Group constants used was FUSION-40 (neutron 42 group, photon 21 group, P5 Legendre expansio n) processed from Japanese Evaluated Nuclear Data Library JENDL-3. All three types of configuration were finally determined with considerati on of detector efficiencies and measurement time.