[1G05-06] Molten Salt Reactor

[1G05] Research and development of a small chloride molten salt fast reactor

(1) Evaluation of power distribution by a coupling calculation of neutronics and thermal-hydroulics

*Yoshihisa Tahara¹, Satoshi Chiba¹, Hiroyasu Mochizuki¹ (1. Tokyo Tech)

Keywords:molten salt reactor, fast reactor, chloride, thermal-hydraulics, coupling calculation

In a molten salt reactor analysis, a coupling calculation between neutronics and thermal-hydraulics is needed since fuel material moves in the core and primary loops. Thus, the core power distribution was calculated by a coupling method and the coupling effect was evaluated. Based on the temperature distribution obtained by RELAP5, the power distribution was calculated using the Monte Carlo code SERPENT2, considering fuel density distribution and doppler broadening of nuclei. As a result, it was found that the coupling calculation slightly moves the core power distribution toward the core bottom.