급수가열기 전열관 교체 후 전열관 손상 원인 분석 Analysis of Tube Damage Cause for Feedwater Heaters Since Tubes Replacement
한국기계기술학회지
(韓國機械技術學會誌)
제22권 제4호
(2020.08)
pp.685-692
pp.685-692
한국기계기술학회
(Korean Society of Mechanical Technology)
초록
The feedwater heaters are critical components in a nuclear power plant. As the operation years of heaters go by, the maintenance costs required for continuous operation increase. Integral drains cooler is the separate heat exchanger combined in the heater shell. The integral drains cooler must be isolated from the other zones. The integral drains cooler must be free from leakage and the entrance into the zone be sealed against the entrance of steam from the condensing zone. Cause of tubes leakage since tubes replacement is the same as the cause before tubes replacement. Therefore, feedwater refurbishment method was selected by heater internal structure condition.
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