Resonance Calculation and Speedup Optimization for 2D Arbitrary Geometry Subgroup

Resonance calculation is the footstone of the reactor lattice design,core design and fuel management.The subgroup resonance calculation method which bases on subgroup parameter,uses the transport equation as a solver and solves the subgroup flux for effective resonance self-shield cross section,finally achieves 2D complicated geometrical resonance calculation.As the transport solver is used iteratively for every resonance energy group,the calculation efficiency is lower than that of equivalence theory.This study is based on the subgroup resonance method and subgroup resonance calculation code designed by ourselves.The multi-group library,transport calculation source,and multi resonance nuclides iteration are proposed and completed.The verification of benchmarks showed that the scheme can increase the efficiency while keeping the same accuracy and insure the engineering practicability.