MODELLING OF CORE PROTECTION CALCULATOR BASED ON STRUCTURED ANALYSIS FOR KOREAN STANDARD NUCLEAR POWER PLANT SIMULATOR

摘要

A nuclear power plant simulator was developed for Korean Standard Nuclear Power Plant (KSNP) in Korea; The Core Protection Caldulator(CPC) for the simulator has been also developed. The CPC is a digital computer-based core protection system, which performs on-line calculation of Departure from Nucleate Boiling Ratio(DNBR) and Local Power Density(LPD). It initiates reactor trip when the core conditions exceed designated DNBR or LPD limitations. With this system, it is possible to increase capacity factor and safety of nuclear power plants, because the CPC can protect reactor core with, accurate calculation. In this study, the function of CPC is analyzed in detail based on Structured Analysis. Compared with plant test results, the predictions with the model show reasonable results.