Proceedings of the KSME Conference (대한기계학회:학술대회논문집)

The Korean Society of Mechanical Engineers (대한기계학회)
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A Study on Applicability of Stainless Steel Type 316N to the PZR Surge-line of OPR1000 and APR1400

Type 316N 스테인리스강의 OPR1000 및 APR1400 가압기 밀림관 적용성에 대한 연구

  • 유완 (한국전력기술(주) 원자로설계사업본부 기계설계처) ;
  • 정성훈 (한국전력기술(주) 원자로설계사업본부 기계설계처) ;
  • 박성호 (한국전력기술(주) 원자로설계사업본부 기계설계처) ;
  • 손갑헌 (한국전력기술(주) 원자로설계사업본부 기계설계처) ;
  • 이봉상 (한국원자력연구소 재료파괴특성평가분야) ;
  • 김민철 (한국원자력연구소 재료파괴특성평가분야)
  • Published : 2008.11.05
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Abstract

The applicability of stainless steel type 316N to the PZR surge-lines of OPR1000 and APR1400 is investigated. So far, strainless steel type 347 has been used for the OPR1000 surge-lines. The degree of improvement in the leak-before-break(LBB) and component design margin is evaluated when stainless steel type 347 is substituted by type 316N. For the study, the tensile and J-R tests on type 316N and type 347 stainless steels were performed at 316 and the microstructure of both types was examined. Stainless steel type 316N shows the higher values on the stress-strain curves, J-R curves and stress intensity, Sm, compared to those of type 347. Therefore, stainless steel type 316N ensures the higher LBB and component design margins. As a result, this study shows that stainless steel type 316N could substitute type 347 for the surge-lines of OPR1000 and APR1400.

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