Regulators, researchers and industry representatives need to exchange information and views on the current regulation and technical issues associated with RI-ISI and NDT qualification by discussing and contrasting the different approaches taken for the further optimisation of in-service inspections in nuclear power plants. The workshop also covered R&D activities performed by international and regional task groups.
Pressurised thermal shock continues to be an important issue for long-term operation. In the past, FALSIRE, and ICAS benchmarks (OCDE/NEA projects) assessed deterministic approaches and first highlighted probabilistic issues. Probabilistic approaches are more and more widely used. The CSNI and its Integrity of Components and Structures working group (IAGE WG) considered there was a need to clearly understand how calculations were performed in the different NEA member countries. Furthermore, recommendations on improvements or on common basis that could be adopted were found to be very valuable. Consequently, in June 2001 the CSNI initiated a benchmark on the probabilistic approach to examining the reactor pressure vessel.
The main objectives of the benchmark on "Probabilistic Approaches of RPV" (PROSIR) were to:
The benchmark consisted of four phases over a period of 4 years:
Several organisations (or teams) from nine OECD/NEA member countries and the European Commission (USA , Sweden, Czech Republic, Germany, Spain, Japan, Korea, EC and France) accepted the invitation to participate in the benchmark.
Building up on this benchmark, this workshop aims to gather participating organisations but also others (utilities, researchers, academics) who could contribute to the discussion and share their experience and techniques on probabilistic approaches of mechanical components in nuclear power plants.
The CSNI Working Group on the Integrity on Components and Structures and in particular its sub-group on the metallic components has produced several studies over the last few years. Recent relevant references are given below.
NEA/CSNI/R(2005)9 Status report on developments and cooperation on Risk-Informed In-Service-Inspection (RI-ISI) and Non-destructive Testing (NDT) Qualification in OECD/NEA member countries
NEA/CSNI/R(2005)3 Review of developments and cooperation on Risk-Informed In-Service-Inspection (RI-ISI) and Non-destructive Testing (NDT) Qualification in OECD/NEA member countries – Responses to the questionnaire
NEA/CSNI/R(2004)9 Proceedings of the CSNI Workshop on "International developments and cooperation on Risk-Informed In-Service-Inspection (RI-ISI) and Non-destructive Testing (NDT) Qualification" Hosted by SKI. Stockholm , Sweden - April 13-14, 2004
NEA/CSNI/R(1994)12 FALSIRE: phase 1: CSNI Project for Fracture Analyses of Large-Scale International Reference Experiments (phase 1): comparison report, 1994.
NEA/CSNI/R(1996)1 FALSIRE: phase II: CSNI project for Fracture Analyses of Large- Scale International Reference Experiments, 1996.
NEA/CSNI/R(1999)3 Comparison Report of RPV Pressurised Thermal Shock International Comparative Assessment Study ( PTS ICAS )
Last updated: 21 June 2006