Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Evaluation of Pressure-Temperature Limit Curve for the Safe Operation of an RFV based on 3-D Finite Element Analyses

유한요소해석을 이용한 원자로용기 압력-온도 한계곡선의 평가

  • 이택진 (한국원자력안전기술원 방사선. 공학연구실) ;
  • 박윤원 (한국원자력안전기술원 방사선. 공학연구실) ;
  • 이진호 (한국원자력안전기술원 방사선. 공학연구실) ;
  • 최재붕 (성균관대학교 기계공학부) ;
  • 김영진
  • Published : 2001.10.01
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Abstract

In order to operate an RPV safely it is necessary to keep the pressure-temperature (P-T) limit during the heatup and cooldown process. While the ASME Code provides the P-T limit curve for safe operation, this limit curve has been prepared under conservative assumptions In this paper the effects of conservative assumptions involved in the P-T limit curve specified in the ASME Code Sec. XI were investigated. Three different parameters the crack depth the cladding thickness and the cooling rate, were reviewed based on 3-D finite element analyses. Also the constraint effect on P-T limit curve generation was investigated based on J- T approach. It was shown that the crack depth and the constraint effect change the safe region in P-T limit curve significantly Therefore it is recommended to prepare a more precise P-T limit curve based on finite element analysis to obtain P-T limit for safe operation of an RPV.

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References

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