NDLI: Experimental Program to Monitor the Irradiation Induced Embrittlement of the French Reactor Pressure Vessel Steels

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Chas, Guillaume Rupa, Nathalie Bourgoin, Josseline Hotellier, Astrid Saillet, Se´bastien
Copyright Year	2004
Abstract	By monitoring the irradiation-induced embrittlement of materials, the Pressure Vessel Surveillance Program (PVSP) contributes to the RPV integrity and lifetime assessments. This program is implemented on each PWR Unit in France; it is mainly based on Charpy tests, which are widely used in the nuclear industry to characterize the mechanical properties of the materials. Moreover, toughness tests are also carried out to check the conservatism of the PVSP methodology. This paper first describes the procedure followed for the Pressure Vessel Surveillance Program. It presents the irradiation capsules: the samples materials (low alloy Mn, Ni, Mo vessel steel including base metals, heat affected zones, welds and a reference material) and the mechanical tests performed. Then it draws up a synthesis of the analysis of about 180 capsules removed from the reactors at fluence levels up to 7.1019 n/cm2 (E > 1 MeV). This database gathers the results of more than 10,000 Charpy tests and 250 toughness tests. The experimental results confirm the conservatism of the Code-based methodology applied to the toughness assessment.
Sponsorship	Pressure Vessels and Piping Division
Starting Page	25
Ending Page	35
Page Count	11
File Format	PDF
ISBN	0791846857
DOI	10.1115/PVP2004-3054
Volume Number	Storage Tank Integrity and Materials Evaluation
Conference Proceedings	ASME/JSME 2004 Pressure Vessels and Piping Conference
Language	English
Publisher Date	2004-07-25
Publisher Place	San Diego, California, USA
Access Restriction	Subscribed
Subject Keyword	Irradiation effects Transition temperature Pressure vessel surveillance program (pvsp) Charpy v testing Low alloy steel Fracture toughness Reactor vessels Surveillance Pressure vessels Irradiation (radiation exposure) Embrittlement Steel
Content Type	Text
Resource Type	Article

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