Qualification of a three-dimensional core dynamics analysis program coupled with a detailed mesh division for commercial boiling water reactors-I

摘要

A three-dimensional time-domain core dynamics analysis program called SUPER-STANDY was developed with a detailed mesh division that makes various trial-and-error procedures and experience-based expertise unnecessary and that can treat the stability peculiar to the boiling water reactor (BWR) core accurately. The program was applied to a plant where regional instability was observed. The results showed that BWR stability can be analyzed using SUPER-STANDY by adding only the core uniform initial disturbance input without considering the reactor core radial regional division. The core regional mode instability can be properly analyzed by the multiregional analysis program.