Analysis of the cracking behavior of Alloy 600 RVH penetrations. Part 1: Stress analysis and K computation
- Framatome, Paris (France)
- EDF-SEPTEN, Villeurbanne (France)
The study presented here concerns the analysis of crack propagation behavior in the Alloy 600 RVH penetrations used in the French 900 and 1300 MWe PWR series. The damage mechanism identified is clearly the SCC in primary water environment. Consequently the analysis presented here is based on: (1) the stress analysis carried out on the RVH penetrations, (2) the SCC model developed in primary water environment and at the operating temperatures, and (3) the fracture mechanics concepts. The different steps involved in the study are: (1) Evaluation of the stress state for the case of the peripheral configuration of RVH penetrations; the case retained here is that of a conic tube with stress analysis conducted using multi-pass welding. (2) Computation of the influence functions (IF) for a polynomial stress distribution in case of a tube of Ri/t ratio (internal diameter/thickness) corresponding to that of an RVH penetration. (3) Establishment of a propagation law based on study and review of data available in the literature. (4) Conduction of a parametric study of crack propagation using several initial defects. (5) Analysis of crack propagation of defects observed in various reactors and comparison with measured propagation rates. This paper (Part 1) deals with the first two steps namely Stress Analysis and K Computation.
- OSTI ID:
- 403286
- Report Number(s):
- CONF-960706-; ISBN 0-7918-1771-7; TRN: 97:000221
- Resource Relation:
- Conference: American Society of Mechanical Engineers (ASME) pressure vessels and piping conference, Montreal (Canada), 21-26 Jul 1996; Other Information: PBD: 1996; Related Information: Is Part Of Fatigue and fracture -- 1996: Volume 2. PVP-Volume 324; Yoon, K.K. [ed.] [Framatome Technologies, Lynchburg, VA (United States)]; Bhandari, S. [ed.] [Framatome, Paris (France)]; Bloom, J.M. [ed.] [Babcock and Wilcox, Alliance, OH (United States)]; Mehta, H. [ed.] [GE Nuclear Energy, San Jose, CA (United States)]; Wilkowski, G. [ed.] [Battelle, Columbus, OH (United States)]; PB: 295 p.
- Country of Publication:
- United States
- Language:
- English
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