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Assessment of Dissimilar Weld Integrity: Final Report of the NESC-III Project

Funded under: FP6-JRC


Dissimilar metal welds are a common feature of light water reactors in connections between ferritic components and austenitic piping systems. Inspection difficulties, variability of material properties and residual stresses all combine to create problems for structural integrity assessment. The NESC-III project was organised by the Network for Evaluating Structural Components (NESC) as a complementary activity to the European Commission sponsored ADIMEW project, with the following objectives:
- Quantify the accuracy of structural integrity assessment procedures for defect-containing, dissimilar metal welds in aged PWR Class 1 piping.
- Utilise results of the ADIMEW large-scale test to determine the actual behaviour of a defect in a DMW of industrial scale.
- Address critical issues including: inspection performance, laboratory-scale fracture testing on welds and potential benefits of advanced fracture modelling.
- Use the results to promote best practice and the harmonisation of international standards.
This final project report summarises the main results and conclusions.

Additional information

Authors: TAYLOR N, European Commission, Joint Research Centre, Institute for Energy, Petten (NL);FAIDY C, EDF SEPTEN, Lyon (FR);GILLES P, EDF SEPTEN, Lyon (FR)
Bibliographic Reference: EUR 22510 EN (2006), 128 pp. Free of charge
Availability: Available from European Commission, JRC Knowledge Management Unit, Ispra (IT) Tel: +39 033278 9893 Fax: +39 033278 5409 E-mail: or Bruxelles (BE) Tel: +32 2 295 76 24 Fax: +32 2 299 63 22
Record Number: 200718937 / Last updated on: 2007-03-16
Original language: en
Available languages: en