Multigroup Scattering Matrix Generation Method Using Weight-to-Flux Ratio Based on a Continuous Energy Monte Carlo Technique

Abstract

We have developed a deterministic group constant generation method based on the calculation results of a continuous energy Monte Carlo technique. This method features multigroup scattering matrix generation via a weight-to-flux ratio. We performed both diffusion and transport core calculations with this set of multigroup constants generated by the proposed method, which we then validated by both a comparison with a conventional method and a critical experiment analysis. The developed method is particularly useful for innovative fuel and future core designs as Monte Carlo calculations are applicable to any heavy material and the geometrical heterogeneity thereof.