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자료유형
학술저널
저자정보
방정진 (중앙대학교) 정동욱 (중앙대학교) 김한곤 (한국수력원자력(주)한수원중앙연구원)
저널정보
한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제53권 제8호
발행연도
2021.8
수록면
2,499 - 2,508 (10page)
DOI
https://doi.org/10.1016/j.net.2021.01.039

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Passive containment cooling systems (PCCSs) have been actively studied to improve the inherent safetyof nuclear power plants. Hered, we present two concepts, open-loop PCCS (OL-PCCS) and closed-loopPCCS (CL-PCCS), applicable to the PWR with a concrete-type containment. We analyzed the heatremoval performance and flow instability of these PCCS concepts using the GOTHIC code. In bothcases, PCCS performance improved when a passive containment cooling heat exchanger (PCCX) wasinstalled in the lower part of the containment building. The OL-PCCS was found to be superior in terms ofheat-removal performance. However, in terms of flow instability, the OL-PCCS was more vulnerable thanthe CL-PCCS. In particular, the possibility of flow instability was higher when the PCCX was installed inthe upper part of the containment. Therefore, the installation location of the OL-PCCS should berestricted to minimize flow instability. Conversely, a CL-PCCS can be installed without any positionalrestriction by adjusting the initial system pressure within the loop, which eliminates flow instability. These results could be used as base data for the thermo-hydraulic evaluation of PCCS in PWR with a largedry concrete-type containment

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