Author:
Ge Yulin,Zhong Yao,Yuan Nan,Sun Yanbing,Yang Zhen,Ma Wei,Zou Liping,Murata Isao,Lu Liang
Abstract
Abstract
In recent years, genetic algorithms have been applied in
nuclear technology design, which have been shown to produce
optimized results more efficiently than traditional enumeration
methods. This advancement in optimization techniques is particularly
useful in the field of nuclear technology design, where complexity
is high and decision-making time is critical. It can be used to
optimize moderator materials for ANS to find composite materials
that provide high neutron beam quality. At present, the direct
combination of Monte Carlo method and genetic algorithm requires a
lot of computing resources and time. And the weights of different
optimization objectives are controversial. Thus, we propose a
two-step method based on NSGA II, which uses macroscopic section as
the intermediate parameters for optimization. It can greatly reduce
the time of genetic algorithm optimization. The method is applied to
the PAFA project of Sun Yat-sen University, the computational speed
has been increased by 50 times based on a 50-generation
optimization. And the results of the genetic algorithm show that the
neutron beam obtained by using composite materials as moderator is
30.8% better than that obtained by using only MgF2 as
moderator. The two-step genetic algorithm optimization has shown its
great potential in the optimization problem of moderator materials.
Subject
Mathematical Physics,Instrumentation