TWO-DIMENSIONAL BWR CORE ANALYSIS USING MULTI-ASSEMBLY CASMO5 AND SIMULATES

摘要

An analysis of a two-dimensional (2D) Boiling Water Reactor (BWR) using Multi-Assembly CASMO5 (C5) and SIMULATE5 (S5) is presented in this work. To model representative conditions of a BWR core depletion in 2D, certain approximations are introduced and a methodology presented that allow users to verify the accuracy of the nodal homogenized S5 model relative to a high-order, full-core transport results provided by multi-assembly C5. Previous assembly burnup and void history, as well as instantaneous conditions such as fuel temperature and void distribution, may be consistently modeled in both codes using the approach presented in this paper. Numerical results, which demonstrate the high level of accuracy achieved by the S5 nodal model relative to the reference fine-mesh transport solution obtained from C5, are presented for a BWR cycle depletion.