Development and Benchmark calculations of Monte Carlo Transport Program MATS for R&D of Accelerator-Driven System

摘要: Accelerator-driven System (ADS) is widely regarded as the most effective transmutation solution of nuclear waste. The Monte Carlo transport simulation of full-energy-range particles, which are involved in both the spallation target and the sub-critical blanket, forms the foundation of ADS simulation studies. Based on the Monte Carlo simulation programs OpenMC and GMT, a program named MATS has been developed, dedicated to the simulation study of the ADS target-reactor system. The physical calculation functions of the program rely on an electromagnetic interaction module, a hadronic interaction module, a high-energy cross-section module, traditional reactor-oriented calculation functions and the nuclear data library. This equips MATS with the capability to simulate the transport processes of particles in a wide-energy range, which is essential for R\&D of ADS because that there will be an underestimation of neutron fluence and heat density at the level of more than 10\% when the neutrons above 20 MeV can not be transported. The benchmark calculations show that MATS can be used to perform ADS physical studies with reasonable deviations which are dominated by the spallation models. The development background of the program, the transport framework and functional modules, the details of the validations and the further development plans are introduced.