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Analysis of Tube Support Plate Reinforcement Effects on Burst Pressure of Steam Generator Tubes with Axial Cracks

증기발생기 전열관지지판의 축균열 파열억제 효과 분석

  • 강용석 (한수원(주) 중앙연구원) ;
  • 이국희 (한수원(주) 중앙연구원) ;
  • 김홍덕 (한수원(주) 중앙연구원) ;
  • 박재학 (충북대학교 안전공학과)
  • Received : 2015.03.31
  • Accepted : 2015.08.18
  • Published : 2015.08.31

Abstract

A steam generator tubing is one of the main pressure boundary of the reactor coolant system in the nuclear power plants. Structural integrity refers to maintaining adequate margins against failure of the tubing. Burst pressure of a tube at tube support plate can be higher than that for a free-span tube because failure behaviors could be interfered from the tube support plate. Alternative repair criteria for out-diameter stress corrosion cracking indications in tubes to the drilled type tube support plate were developed, however, there are very limited information to the eggcrate type tube support plate. This paper discussed reinforcement effect of steam generator tube burst pressure with axial out-diameter stress corrosion cracking within an eggcrate type tube support plate. A series of tube burst tests were performed under the room temperature and it was found out that there is no significant but marginal effects.

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