The purpose of this paper is to introduce a new EUROATOM project focusing on the structural integrity assessment of dissimilar metal weld. The project started in February 2012 and will last 3 years. The project is coordinated by VTT with 10 partner organizations from Europe: Technical Research Centre of Finland, Finland (VTT) - Coordinator AREVA NP, France and Germany (ANP) Commissariat à l’Énergie Atomique et aux energies alternatives, France (CEA) Joint Research Centre of the European Commission, Belgium (JRC) EdF-Energy, United Kingdom (BE) Bay Zoltán Foundation for Applied Research, Hungary (BZF) Electricité de France, France (EDF) TECNATOM, Spain (TEC) Jožef Stefan Institute, Slovenia (JSI) Studsvik Nuclear AB, Sweden (STU). Within MULTIMETAL, the main objectives are:

- Develop a codification for fracture resistance testing in multi-metal specimens.

- Develop harmonized procedures for dissimilar metal welds integrity assessment.

The underlying aim of the project is to provide recommendations for a good practice approach for the integrity assessment (especially testing) of dissimilar metal welds as part of overall integrity analyses including leak-before-break (LBB) procedures.

The project will promote the development of a common understanding for structural integrity assessment of dissimilar metal welds (DMWs) in existing and future nuclear power plants (NPPs) in EU member states. It will provide the technical basis for the development of harmonized European codification for multi-metal components, which is currently non-existing. A trainee program will be finally developed and text book as well as learning materials will be issued. The project will interact with the European Network of Excellence NULIFE and NUGENIA.

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