Evaluation of Pressure-Temperature Limit Curve for the Safe Operation of an RFV based on 3-D Finite Element Analyses

- Journal title : Transactions of the Korean Society of Mechanical Engineers A
- Volume 25, Issue 10, 2001, pp.1567-1574
- Publisher : The Korean Society of Mechanical Engineers
- DOI : 10.22634/KSME-A.2001.25.10.1567

Title & Authors

Evaluation of Pressure-Temperature Limit Curve for the Safe Operation of an RFV based on 3-D Finite Element Analyses

Lee, Taek-Jin; Park, Yun-Won; Lee, Jin-Ho; Choe, Jae-Bung; Kim, Yeong-Jin;

Lee, Taek-Jin; Park, Yun-Won; Lee, Jin-Ho; Choe, Jae-Bung; Kim, Yeong-Jin;

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.

Keywords

P-T Limit Curve;ASME Code Sec. XI;Stress Intensity Factor;J-T Analysis;Constraint Effect;

Language

Korean

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