CORE PROTECTION CALCULATOR SYSTEM: PAST, PRESENT, AND FUTURE
The Core Protection Calculator System (CPCS) was the first implementation of digital computers in a nuclear power plant safety protection system. The system was based on first principles to calculate the specified acceptable fuel design limit (SAFL) online. This approach provides the theoretical optimum safety margin. The first-of-its-kind system was installed in the United States at Arkansas Nuclear One Unit 2 (ANO-2) in 1980. Extensive efforts were made by Combustion Engineering and U.S. Nuclear Regulatory Commission (NRC) staff to gain licensing approval of the CPCS. Based on accumulated operating experience, numerous improvements were made to enhance the performance of the CPCS. The CPCS software provided the flexibility to readily accommodate these design changes. Currently, CPCS is implemented in 21 nuclear power plants in operation or under construction in the U.S.A. and Asia. The next generation CPCS wil focus on optimizing the plant protection by improving the SAFL calculation. By taking advantage of the advances in digital computer technology, the comprehensive safety analysis code wil be used online. A more detailed core power map using the incore detector signals wil be used as the basis of the departure from nucleate boiling ratio (DNBR) and local power density (LPD) calculation. A quick power reduction wil provide adequate margin for most of the design basis events. For these events, CPCS wil initiate a reactor power cutback as opposed to a reactor trip, which wil maintain the plant at a safe condition with a reduced power leveL.
Peter L.Hung
Westinghouse Electric Company LLC 20 International Drive Windsor, CT 06095 USA
国际会议
18th International Conference on Nuclear Engineering(第18届国际核能工程大会 ICONE 18)
西安
英文
1-8
2010-05-17（万方平台首次上网日期，不代表论文的发表时间）