IAEA ADS benchmark analysis of KUCA experiments: Phase I - 15254

This paper presents benchmark calculation results for the neutronics parameters of the Kyoto University Critical Assembly (KUCA) with an accelerator-driven system, concerning core reactivity, reaction rates of indium wires, and reaction rates of the activation foils installed to obtain the neutron spectrum. A developed MCNP model with the ENDF/B-VII.1 library simulates the details of all core configurations and components according to the benchmark specification. The calculation result is compared with the experimental value. Results of this benchmark analysis can be summarized as follows: First, the reactivity calculation result shows acceptable agreement with the measured value within 10% error for excess reactivity, and from 1.3% to around 13% error for subcriticality. Secondly, the indium wire reaction rates along the vertical of the core is calculated, and the result shows good agreement with the measured value