Multi-objective Optimization Method And Platform Development For Marine Reactor Radiation Shielding Design

Radiation shield design is an important part of reactor engineering design,which directly affects the realization of overall design goals.Especially for the marine nuclear reactor,the radiation shielding design requires not only the specified area to meet the radiation dose limit,but also strict control of the weight and volume of the shielding system,which is a typical multi-objective optimization problem.In order to improve the payload,speed and maneuverability of nuclear-powered ships,while fully ensuring the radiation safety of professional personnel outside the reactor cabin and the service life of key equipment outside the reactor,the reactor device is required to be small and light,and the equipment layout is compact,making the marine The radiation shielding design requirements of the reactor are more stringent,and the multi-objective constraints such as dose,weight,and volume need to be considered for comprehensive optimization design.Aiming at the multi-objective optimization problem of marine reactor radiation shielding,this paper first builds a multi-objective optimization mathematical model of marine reactor radiation shielding;secondly,establishes a multi-objective intelligent optimization method of radiation shielding based on evolutionary multi-target genetic algorithm;again,based on the framework of SALOME platform,the functional modules of radiation shielding modeling,multi-objective intelligent optimization and shielding results visualization are integrated into the platform,which is a multi-objective optimization platform for radiation shielding design of marine reactor;finally,the Savannah icebreaker reactor(Savannah)model and the marine reactor(MRX)model are used to verify the applicability of the multi-objective optimization method and the platform.The numerical verification results show that the method and platform implemented in this paper can automatically adjust and iteratively optimize the key design parameters such as the material types and structural sizes of the marine reactor radiation shielding system,and quickly obtain the optimized radiation shielding scheme that meets the multi-objective constraints.In this paper,the advanced intelligent optimization algorithm is combined with the radiation shielding calculation method,and an intelligent multi-objective optimization algorithm suitable for marine reactor radiation shielding design is established.The method in this paper can provide some technical support for improving the design performance and design efficiency of the marine reactor radiation shield,and can also provide some valuable reference suggestions for the conceptual design of the new-type reactor radiation shield.