열교환기 전열관 내부 이물질에 의한 건전성 평가방법

This study is concerned about an establishment of methodology for tube integrity evaluation due to foreign object in tube side of heat exchanger on power plants. Tube damage by foreign object in tube side treats tube integrity and makes heat exchanging function loss, nevertheless, the evaluation of tube integrity is difficult and do not established well now. The method introduced in this paper has following characteristics. a) First, some resonable conservative assumption is set up for simplifying the problems after definition of problem, b) Moving track of foreign object is followed by reviewing the geometric size of tube and foreign object, c) Establishment of integrity evaluation method based on tube damage mechanism is selected and formulated under previous assumption and d) Finally, regulatory or design requirements are checked. As an example of application for above methodology, tube integrity by two arbitrary shape foreign objects such as spring and tubing were evaluated. This method would be easily used as directional guideline for evaluating integrity of tube due to foreign object in tube side of heat exchanger on power plants.