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In nuclear engineering, structural integrity is particularly important because nuclear facilities must be capable of preventing the leakage of radioactive materials under normal, abnormal, and accidental conditions. This paper aims to investigate the resistance of a Nuclear-Grade HVAC damper in a nuclear power plant against typical seismic loads. A finite element analysis (FEA) was conducted using ANSYS. Firstly, modal analyses were performed to predict the dynamic characteristics of the air damper using the Block-Lanczos algorithm. Subsequently, seismic analyses were performed by combining different loads, including dead weight (DW), operating pressure (P), seismic loads (SL), and maintenance live loads (L), under various operating conditions. Finally, this paper evaluates briefly the results of seismic analysis for Nuclear-Grade HVAC damper, which satisfactorily met the stress and deflection criteria according to the ASME codes.

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Modal and Seismic Analyses for Nuclear-Grade HVAC Damper in Nuclear Power Plant

  • 会议论文

  • 发表日期：

    2026年

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  • Zhe Lyu,
  • Xipeng Ma,
  • Lihui Jiao

摘要

In nuclear engineering, structural integrity is particularly important because nuclear facilities must be capable of preventing the leakage of radioactive materials under normal, abnormal, and accidental conditions. This paper aims to investigate the resistance of a Nuclear-Grade HVAC damper in a nuclear power plant against typical seismic loads. A finite element analysis (FEA) was conducted using ANSYS. Firstly, modal analyses were performed to predict the dynamic characteristics of the air damper using the Block-Lanczos algorithm. Subsequently, seismic analyses were performed by combining different loads, including dead weight (DW), operating pressure (P), seismic loads (SL), and maintenance live loads (L), under various operating conditions. Finally, this paper evaluates briefly the results of seismic analysis for Nuclear-Grade HVAC damper, which satisfactorily met the stress and deflection criteria according to the ASME codes.