• NUCLEAR TECHNIQUES
  • Vol. 48, Issue 3, 030601 (2025)
Chengming HAO1,*, Jing ZHAO1, Tao WANG2, Tiebo LIANG1..., Yu WANG1, Huitian XU1, Yan SUN1, Qiao YU1 and Hao ZHANG1|Show fewer author(s)
Author Affiliations
  • 1Nuclear Power Institute of China, Chengdu 610005, China
  • 2No.92351 Unit of PLA, Sanya 527000, China
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    DOI: 10.11889/j.0253-3219.2025.hjs.48.230140 Cite this Article
    Chengming HAO, Jing ZHAO, Tao WANG, Tiebo LIANG, Yu WANG, Huitian XU, Yan SUN, Qiao YU, Hao ZHANG. Applicability of secondary-developed RELAP5 code for PRS operation analysis under inclined conditions[J]. NUCLEAR TECHNIQUES, 2025, 48(3): 030601 Copy Citation Text show less

    Abstract

    Background

    The operational characteristics of passive residual heat removal systems (PRS) under marine conditions are crucial for the thermal and hydraulic safety of offshore floating nuclear power plants.

    Purpose

    This study aims to verify the applicability of the re-developed RELAP5 code under inclined conditions.

    Methods

    Based on the small-scaled secondary side of the PRS experimental device, simulation of the experiments were carried out by using the secondary-developed RELAP5 code under the operating conditions of the inclination angle from -24° to +24°. Then, a comparative analysis of experimental data was performed to verify the applicability of this secondary-developed code.

    Results

    The results show that the length of the condensing section in the C-type heat exchanger is changed under inclination conditions, and the larger the tilt angle, the better the overall heat transfer effect is achieved. Besides, the re-developed RELAP5 code can effectively predict changes in the system operating characteristics under tilt conditions, and the deviation between the calculated results and the experimental values is within ±4%.

    Conclusions

    The results of this study provides some reference for the design of the secondary side passive heat removal system under marine conditions.

    Chengming HAO, Jing ZHAO, Tao WANG, Tiebo LIANG, Yu WANG, Huitian XU, Yan SUN, Qiao YU, Hao ZHANG. Applicability of secondary-developed RELAP5 code for PRS operation analysis under inclined conditions[J]. NUCLEAR TECHNIQUES, 2025, 48(3): 030601
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