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Modification of Current Leak Before Break Criteria for Nuclear Piping System

원자력 발전소 배관에 대한 파단전누설 개념 적용기준의 수정

  • 유영준 (한국원자력 연구소) ;
  • 김영진 (성균관대학교 기계설계학과)
  • Published : 1996.06.01

Abstract

The puopose of this paper is sto modify the current LBB criteria. The validity of current LBB criteria and current standard LBB analysis mehtod are evaluated using linear elastic fracture mechanics and elastic-plastic fracture mechanics. The results of evaluation demonstrate that the current LBB driteria are very conservative and some level of margins already exist in the standard LBB analysis method. Thus, the margin on load .root. and margin on crack size 2 can be eliminated to extend LBB application for the samller diameter pipe.

Keywords

Leak Before Break;LBB;Leak Rate;Stability Evaluation;LBB Criteria