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논문 기본 정보

저자정보
(부산대학교) (부산대학교)
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대한기계학회 대한기계학회 춘추학술대회 대한기계학회 2019년 학술대회
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    초록·키워드

    A freeze plug facility of pressurized heavy water reactor (PHWR) power plants is installed to inject liquid nitrogen into the pipe to isolate the primary heat transportation system throughout the maintenance of PHWR power plants. In 2017, at a PHWR power plant, coolant leakage occurred in the freeze plug installed in front of the emergency core cooling system isolation valve. In this work, the comparative study of mock-up testing and numerical analysis was performed to analyze the cause of the leakage and further improve the reliability of PHWR power plants. A freeze plug mock-up facility was constructed and several testing was conducted from various perspectives, which was then compared with numerical analysis results from finite element analysis. Based on the comparative study, potential improvement on the maintenance procedure for the freeze plug facility is suggested, which can be useful information for the safe operation of PHWR power plants.

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