AUTHOR=Liu Bin , Tan Yi , Jing Futing , Hu Guang , Yan Mingfei 

TITLE=Study on multi-objective optimization for nuclear reactor radiation shield design coupling genetic algorithm with paralleling discrete ordinate code

JOURNAL=Frontiers in Energy Research

VOLUME=Volume 10 - 2022

YEAR=2022

URL=https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2022.935648

DOI=10.3389/fenrg.2022.935648

ISSN=2296-598X

ABSTRACT=An optimization method combining genetic algorithm and the paralleling SN code HYDRA is developed and applied to shielding design of the Savannah reactor. Several approaches are studied to cope with the multi-objective optimization problem, such as the transforming into single-objective optimization approach, non-dominated sorting approach using NSGA-II and the approach of adding constraints on sub-objectives using the NSGA-II algorithm. Comparing with the current design methods, the optimization method developed in this paper show better performance since the HYDRA calculations are free of statistical fluctuations and the searching process is independent of human preferences. The multi-objective optimization approach with constraints on sub-objectives seems to have the best performance. More optimized individuals satisfying the constraints can be obtained and the optimized objectives show best improvements comparing with the initial design.