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Verification of the AP1000 Nuclear Power Plant Simulator NPPSim Against RELAP5 for Transient Analysis

[+] Author Affiliations
Shifa Wu, Pengfei Wang, Huawei Fang, Xinyu Wei, Fuyu Zhao

Xi’an Jiaotong University, Xi’an, China

Paper No. ICONE24-60149, pp. V005T15A008; 8 pages
  • 2016 24th International Conference on Nuclear Engineering
  • Volume 5: Student Paper Competition
  • Charlotte, North Carolina, USA, June 26–30, 2016
  • Conference Sponsors: Nuclear Engineering Division
  • ISBN: 978-0-7918-5005-3
  • Copyright © 2016 by ASME


To thoroughly investigate the AP1000 reactor system, an AP1000 Nuclear Power Plant Simulator (NPPSim) was built and applied to the AP1000 transient and control system analysis in MATLAB/Simulink environment. In this study, a 100%–90%FP load step transient condition of AP1000 PWR was simulated by both NPPSim and RELAP5 simultaneously to verify the NPPSim’s capability of transient analysis. To realize this objective, a RELAP5 model of AP1000 PWR was firstly developed and relevant control systems were implemented in the input deck of RELAP5. Then the transient was performed to conduct this verification under the same conditions. The comparisons show a good agreement in terms of the changing trends. In addition, the deviations of the NPPSim simulation results and the RELAP5 calculating results are in the acceptable range. Therefore, the NPPSim is capable to implement the 100%–90%FP load step transient analysis for AP1000. More transient conditions should be simulated and studied for further verification.

Copyright © 2016 by ASME



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