Thermal-Hydraulic Analysis of Concept Design of Spallation Target in Chinese Accelerator Driven Subcritical System

Abstract

A concept design of spallation target in Chinese Accelerator Driven Subcritical System (ADS) was proposed in this paper. Spallation target is located in the center of an ADS, which produces neutron source for nuclear transmutation. The thermal-hydraulic demands for spallation target were proposed, and Lead-Bismuth Eutectic (LBE) was chosen as the spallation target and the coolant for the ADS. The deposition heat in the spallation target was calculated by MCNPX code, and the thermal-hydraulic behavior in the spallation target zone was calculated by CFD code FLUENT. The target can fulfill the design tasks under current design parameters. Different design parameters as well as different window shapes were studied to find their impacts to the temperature distribution and velocity distribution, and a proper design was proposed for future ADS with higher input energy.