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자료유형
학술저널
저자정보
저널정보
한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제46권 제1호
발행연도
2014.1
수록면
39 - 46 (8page)

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A total loss of all heat sinks is considered a severe accident with a low probability of occurrence. Following a total lossof all heat sinks, the degasser/condenser relief valves (DCRV) become the sole means available for the depressurization ofthe primary heat transport system. If a nuclear power plant has a total loss of heat sinks accident, high-temperature steam anddifferential pressure between the primary heat transport system (PHTS) and the steam generator (SG) secondary side cancause a SG tube creep rupture. To protect the PHTS during a total loss of all heat sinks accident, a sufficient depressurizationcapability of the degasser/condenser relief valve and the SG tube integrity is very important. Therefore, an accurateestimation of the discharge through these valves is necessary to assess the impact of the PHTS overprotection and the SGtube integrity of the primary circuit. This paper describes the analysis of DCRV discharge capacity and the SG tube integrityunder a total loss of all heat sink using the CATHENA code. It was found that the DCRV's discharge capacity is enough toprotect the overpressure in the PHTS, and the SG tube integrity is maintained in a total loss of all heat accident.

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