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As a large-scale passive pressurized water reactor (PWR), the CAP1400 can directly utilize nuclear fission heat for cogeneration, thereby enhancing energy conversion efficiency. This paper proposes an innovative cogeneration scheme for the CAP1400 nuclear power plant, integrating Intermediate Pressure Exhaust (referred to as IP-exhaust) steam extraction with a Dual-Unit Cascade Steam Extraction Heating System (referred to as DUCS) thermodynamic coupling architecture. This system achieves significant improvements in cogeneration efficiency and capacity through multi-stage heating of circulating water. Theoretical analyses and safety assessments confirm that this scheme can fulfill district heating demands while maintaining safe operational limits for both the steam turbine and reactor core. Additionally, its implementation offers considerable economic and environmental advantages, including reduced fossil fuel consumption and lower greenhouse gas emissions compared to conventional energy systems.

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Energy Consumption Analysis of Cogeneration Schemes for the CAP1400 PWR Nuclear Power Plant

  • 会议论文

  • 发表日期：

    2026年

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  • Baoguo Zhang,
  • Chunguang Liu,
  • Weiyan Meng,
  • Yufeng Shi,
  • Xu Li

摘要

As a large-scale passive pressurized water reactor (PWR), the CAP1400 can directly utilize nuclear fission heat for cogeneration, thereby enhancing energy conversion efficiency. This paper proposes an innovative cogeneration scheme for the CAP1400 nuclear power plant, integrating Intermediate Pressure Exhaust (referred to as IP-exhaust) steam extraction with a Dual-Unit Cascade Steam Extraction Heating System (referred to as DUCS) thermodynamic coupling architecture. This system achieves significant improvements in cogeneration efficiency and capacity through multi-stage heating of circulating water. Theoretical analyses and safety assessments confirm that this scheme can fulfill district heating demands while maintaining safe operational limits for both the steam turbine and reactor core. Additionally, its implementation offers considerable economic and environmental advantages, including reduced fossil fuel consumption and lower greenhouse gas emissions compared to conventional energy systems.