Measurement of Reaction Rate Distribution in Partial Mockups for the ITER TBM with DT Neutrons

Abstract

In the previous studies, the calculated TPRs were overestimated by more than 10 % compared with the measured values in the experiment with a neutron source reflector. In order to confirm that these overestimation are found on other reactions, reaction rate distributions are measured on ¹⁹⁷Au(n,γ)¹⁹⁸Au and ⁹³Nb(n,2n)^92mNb in the ITER TBM mockups with and without a reflector by the activation foil method with DT neutron irradiation experiments. Analyses are performed with MCNP-4C and FENDL-2.1. The ratios of the calculation results to the experimental ones with a reflector are slightly larger than those without a reflector on the reaction rate of ¹⁹⁷Au(n,γ)¹⁹⁸Au.