The paper presents an assessment of existing constraint-based procedures for as-received and aged nuclear power plant components, which has been performed as part of the European project VOCALIST. Current analytical procedures and gaps in understanding and limitations in constraint-based procedures are summarized and a First Best-Practice Handbook for constraint-based procedures is outlined. This handbook is based on case studies provided by the VOCALIST partners. The cases are selected to provide an overview of the state-of-the art methods include two-parameter and local approach analyses for cleavage and ductile tearing of different structural components.

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