BR2/CHIVAS Irradation in support of enhanced surveillance of nuclear reactor pressure vessels

Albert Fabry, Serge Bodart, Paul de Bakker, Rachid Chaouadi, Luigi Puzzolante, Eric van Walle, José Van de Velde, Robert Gérard

Research outputpeer-review


An enhanced reactor pressure vessel surveillance technology is being developed in Belgium. The aim is to determine in-service shifts of static initiations fracture toughness in a more direct and precise manner than possible through the current indexation procedure to the CVN impact test.The technology entails the reconstruction, precracking and slow bend testing of broken CVN remnants, and emphasizes the maximization of information by combining static tensile dislocation theory and micromechanical modeling provide the interpretation tools allowing to justify plant-specific embrittlement trend curves.
This enhanced surveillance technology is being actively validated. An important component in this effort is BR2/Chivas Accelerated Irradiated an Testing Programme, summarized in this paper.
The results of the first irradiaton to 5 E19 cm^-2 (>1MeV, nominal) at a temperature of 290°C are presented, as well as preliminary data from an irradiation to the same fluence at 260°C. The lower temperature was selected to match the operation temperatures of the recently sampled BR3 and Chooz-A vessels; the results obtained by BR2/CHIVAS exposure of BR3 base metal specimens are compared to the results from the vessel testing programme.
Original languageEnglish
Title of host publication IAEA Specialists' Meeting on Irradiation Embrittlement and Mitigation, 23 - 26 October. 1995, Espoo, Finland
PublisherIAEA - International Atomic Energy Agency
Number of pages21
StatePublished - 1995
Event1995 - IAEA Specialists Meeting on Irradiation Embrittlement and Mitigation - Espoo
Duration: 23 Oct 199526 Oct 1995


Conference1995 - IAEA Specialists Meeting on Irradiation Embrittlement and Mitigation

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