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The aim of the Emergency Diesel Generator (EDG) is to provide emergency electrical power to the critical nuclear power plant equipments in case of onsite, offsite events and/or power sources become unavailable or degraded. The EDG control system, as the core control components of EDG, its safety and reliability are of vital importance. At present, the EDG control system of a nuclear power plant in China is imported from abroad and mainly composed of relays, threshold modules, signal modules, etc. It caused many problems such as outdated equipment products, difficulty of technical maintenance, and high operation and maintenance costs. In order to solve the problems above, on the premise of retaining the original cabinet, external interfaces of the system, level 0 cables, etc., and according to the technical characteristics of NASPIC, which is independently developed by Nuclear Power Institute of China (NPIC), as well as the requirements of regulatory standards, a replacement analysis was conducted and a digital EDG control system has been developed. The analysis results indicate that the digital EDG control system based on NASPIC can achieve all the functions and performance of the original system, and can realize the reuse of all the original communication interfaces and signal interfaces. In order to ensure that the digital EDG control system can work safely and stably in the original cabinet, in according with regulatory standards, cabinet seismic and heat dissipation simulation analysis was conducted. First, the cabinet model was established in ABAQUS software, and the cabinet seismic reconstruction scheme was designed based on finite element calculation. Then, with FloTHERM software, the internal layout of the cabinet was optimized based on computer fluid dynamics technology (CFD). Finally, a prototype of the EDG control system was manufactured. The results of the functional performance testing and equipment qualification of the prototype have confirmed that it meets the requirements of regulatory standards, which means the prototype is suitable for application in practical projects, providing a novel solution for the engineering implementation of domestic substitution for the EDG control system.

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Design and Verification of Domestic Substitution of Emergency Diesel Generator Control System of Nuclear Power Plant Based on NASPIC

  • 会议论文

  • 发表日期：

    2025年

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  • Jianfeng Yao,
  • Xianjian He,
  • Zhao Chen,
  • Jing Wen,
  • Haotian Liang,
  • Yifan Wang

摘要

The aim of the Emergency Diesel Generator (EDG) is to provide emergency electrical power to the critical nuclear power plant equipments in case of onsite, offsite events and/or power sources become unavailable or degraded. The EDG control system, as the core control components of EDG, its safety and reliability are of vital importance. At present, the EDG control system of a nuclear power plant in China is imported from abroad and mainly composed of relays, threshold modules, signal modules, etc. It caused many problems such as outdated equipment products, difficulty of technical maintenance, and high operation and maintenance costs. In order to solve the problems above, on the premise of retaining the original cabinet, external interfaces of the system, level 0 cables, etc., and according to the technical characteristics of NASPIC, which is independently developed by Nuclear Power Institute of China (NPIC), as well as the requirements of regulatory standards, a replacement analysis was conducted and a digital EDG control system has been developed. The analysis results indicate that the digital EDG control system based on NASPIC can achieve all the functions and performance of the original system, and can realize the reuse of all the original communication interfaces and signal interfaces. In order to ensure that the digital EDG control system can work safely and stably in the original cabinet, in according with regulatory standards, cabinet seismic and heat dissipation simulation analysis was conducted. First, the cabinet model was established in ABAQUS software, and the cabinet seismic reconstruction scheme was designed based on finite element calculation. Then, with FloTHERM software, the internal layout of the cabinet was optimized based on computer fluid dynamics technology (CFD). Finally, a prototype of the EDG control system was manufactured. The results of the functional performance testing and equipment qualification of the prototype have confirmed that it meets the requirements of regulatory standards, which means the prototype is suitable for application in practical projects, providing a novel solution for the engineering implementation of domestic substitution for the EDG control system.