Community Research and Development Information Service - CORDIS

FP6

NESC III Destructive Examination Report, Inspection Task group, RRT Dissimilar Metal Weld Component

Funded under: FP6-JRC

Abstract

NESC-III is a project being performed by the Network for Evaluating Structural Components (NESC). NESC was set up over 10 years ago to address the verification of advanced structural integrity assessment techniques for safety-critical reactor components. Through its self-funded activities and associated projects, partly funded by the European Commission�s DG-RTD, it has developed a significant body of benchmark R&D data, in particular for large-scale tests performed under closely monitored conditions.
The overall objectives of NESC-III are:
- Quantify the accuracy of structural integrity assessment procedures for defect-containing, dissimilar metal welds in aged PWR Class 1 piping.
- Utilise results of a unique large scale test (ADIMEW) 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.
Within the project Task Group 1 has addressed the performance of non-destructive inspection techniques, based on robin-robin trials design to allow the participating teams to gain experience in both flaw detection and sizing in DMWs and to compare ultrasonic responses of sharp planar defects with those of realistic defects.
The JRC arranged the fabrication of a special mock-up with two DMWs (Weld A with 308L austenitic filler, as in the ADIMEW component, and Weld B with an Inconel 182 type filler). Both of these contained a series of simulated defects. The bore of the central ferritic section was clad to make the inspection task more realistic. The exact location, type and dimensions of the defects are kept strictly secret. The component was circulated to 7 European inspection teams in 2003-2004. The main ultrasonic techniques applied were: pulse echo; focused probes; phased array and TOFD.

Additional information

Authors: LOFAJ F, European Commission, Joint Research Centre, Institute for Energy, Petten (NL);SELDIS T, European Commission, Joint Research Centre, Institute for Energy, Petten (NL);WALLENDORF M, European Commission, Joint Research Centre, Institute for Energy, Petten (NL);IACONO I, European Commission, Joint Research Centre, Institute for Energy, Petten (NL);ERIKSEN B, European Commission, Joint Research Centre, Institute for Energy, Petten (NL);MENDES J, European Commission, Joint Research Centre, Institute for Energy, Petten (NL);METTEN L, European Commission, Joint Research Centre, Institute for Energy, Petten (NL)
Bibliographic Reference: EUR 22607 EN (2006), 52 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: jrc-info@ec.europa.eu or Bruxelles (BE) Tel: +32 2 295 76 24 Fax: +32 2 299 63 22
Record Number: 200718945 / Last updated on: 2007-03-16
Category: PUBLICATION
Original language: en
Available languages: en