급수가열기 전열관 교체 후 전열관 손상 원인 분석
Analysis of Tube Damage Cause for Feedwater Heaters Since Tubes Replacement
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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.
Abstract
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.
참고문헌 (6)
- Electric Power Research Institute, "Feedwater Heater Maintenance Guide", 2-1~2-2 (2002)
- Song S. Y., "Analysis of Damage Causes for Feedwater Heater Shell Side in the Nuclear Power Plants", Transactions of Korean Society of Pressure Vessels and Piping, pp.18~26
- Electric Power Research Institute, "Feedwater Heater Maintenance Guide", 4-8~4-13 (2002)
- Electric Power Research Institute, "Feedwater Heater Maintenance Guide", 2-10~2-11 (2002)
- Bruce W Schafer, "Feedwater Heater Life Extension- Tube expansion at drain cooler end plates", Feedwater Heater Seminar, pp.14-3~14-13 (2007)
- Electric Power Research Institute, "Feedwater Heater Maintenance Guide", 8-2~8-5 (2002)