Following the incident (through-wall crack and crazing zones) of May 1998 on the principal mixing zone of the residual heat removal system at CIVAUX nuclear plant, EDF has initiated a R&D programme to understand the incident and assess the risks of damage on other nuclear plant mixing zones. The programme includes different sectors of development: assessment of temperature fluctuations in mixing zones, study of high-cycle thermal fatigue behaviour of austenitic steel and development of mechanical methodologies for damage assessment and propagation of crazing zones (thermal striping). A series of tests is being performed in support of the programme. The paper develops the description of each sector of the programme: tests performed, on-site measurements and numerical interpretations. The first results are presented.
Evaluation of the Risk of Damages in Mixing Zones: EDF R&D Programme
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Stephan, JM, Curtit, F, Vindeirinho, C, Taheri, S, Akamatsu, M, & Peniguel, C. "Evaluation of the Risk of Damages in Mixing Zones: EDF R&D Programme." Proceedings of the ASME 2002 Pressure Vessels and Piping Conference. Fatigue, Fracture and Damage Analysis, Volume 1. Vancouver, BC, Canada. August 5–9, 2002. pp. 33-38. ASME. https://doi.org/10.1115/PVP2002-1328
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