Development and verification of heat production and radiation damage energy production cross section module in the nuclear data processing code NECP-Atlas

摘要

The heat production and radiation damage energy production cross section are essential nuclear data to calculate the heating and displacements per atom (DPA) in nuclear material. A new module is developed in nuclear data processing code NECP-Atlas to calculate heat production and radiation damage energy production cross section. Besides of the NRT-DPA model used in the traditional nuclear data processing codes, the state-of-the-art Athermal Recombination Corrected DPA (ARC-DPA) model is also implemented to improve the precision of DPA calculation. ARC-DPA model can be extended from the NRT-DPA model by multiplying the efficiency function. The material constants in the efficiency function can be determined from Molecular Dynamics (MD) simulations or experiments. The material constants of some materials are obtained in this paper. Numerical results show that NECP-Atlas agrees well with NJOY2016 when they use the same models, and the ARC-DPA model implemented in NECP-Atlas improves the precision of DPA calculation. (C) 2020 Elsevier Ltd. All rights reserved.