Preliminary design of safety system using phase change material for passively cooling of nuclear reactor containment building

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The new application of phase change material for passively cooling the containment building of a nuclear power plant provides many benefits such as minimized wall penetration, low maintenance cost, and the possibility of installation in currently operating power plants with a minimal design change. In this study, the applicability of PCM as a passive containment cooling system is verified through design and evaluation of the PCM condenser. In addition, the effective heat capacity method is verified for simulating the melting process of PCM in the condition of a reactor accident. The PCM condenser design is optimized with five design parameters; melting point, volume, heat transfer area, effective thermal conductivity, and total heat absorbed. The performance of the PCM condenser is evaluated by containment safety analysis and is compared to that of an active containment cooling system. Although the PCM condenser had a limitation for absorbing only a fixed amount of thermal energy due to the absence of an external heat sink, the PCM condenser shows better performance in the early stage after the accident initiation compared to the single spray system and finally maintains the integrity of the containment building.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Issue Date
2022-01
Language
English
Article Type
Article
Citation

APPLIED THERMAL ENGINEERING, v.200, pp.117672

ISSN
1359-4311
DOI
10.1016/j.applthermaleng.2021.117672
URI
http://hdl.handle.net/10203/288280
Appears in Collection
NE-Journal Papers(저널논문)
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