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Risk informed in-service inspection (ISI) has been considered a priority area within the multi-annual programme of the Nuclear Regulators Working Group of the European Commission.

During its meeting in November 1996 the NRWG decided to set up task-force to agree on the philosophy and principles of governing the risk-informed in-service inspection and testing of mechanical components of nuclear power plants, in order to maintain sufficient margins against leakage's and failure, considering dose exposures to the public.

The TF was made up of representatives from AVN, HSK, BfS, CSN, SKI, STUK and SONS, the latter participating in some TF meetings only. The chairman was the representative from SKI and Unit DG XI/C.2 of the European Commission provided by the TF with the corresponding technical secretary services.

The first task of the TF was the preparation of a questionnaire as a basis for the analysis of national and international activities in the field of risk-informed ISI. The questionnaire was sent to the members of the NRWG and responses from the participating countries and HSE and SZW. Appendix A of this document contains a summary of these responses along with corresponding analysis and conclusions.

The TF held six meetings and information on the progress was reported to the NRWG at its plenary sessions. ssions.

Additional information

Authors: NRWG TASKFORCE, European Commission (LU)
Bibliographic Reference: EUR 19153 EN (1999), 57pp.
Availability: Available from OOPEC Sales agents
ISBN: ISBN 92-828-7753-1
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