Community Research and Development Information Service - CORDIS


Leak Before Break (LBB) has been considered a priority area within the multi-annual programme (1996-2000) of the Nuclear Regulators Working Group (NRWG) of the European Commission.

During its meeting in November 1996 the NRWG set up a Task Force (TF) to compare and contrast the approaches taken by the safety authorities in the field of LBB for pressure retaining components of existing Nuclear Power Plants (NPPs). Existing practices are described in the report. The ultimate goal was to provide a set of good practices deemed useful by members of the TF.

The TF held five meetings and progress was reported to the NRWG at its plenary sessions.

The present report represents the work product of the activities conducted by TF. These activities were mainly concentrated on those aspects directly related with nuclear safety, bearing in mind the overall safety concept of defence in depth. All the other aspects linked with the methodology for the application of the LBB concept have also been considered in a more general way. Chapter 6 "Conclusions and Recommendations" constitutes a brief synthesis of the discussions held by the group on key issues developed in previous chapters , and it is organized into the following sections: Impact on design basis, technical substantiation, limitations of LBB application, procedures and LBB implementation.

Additional information

Authors: The Nuclear Regulators' Working Group Task Force on Leak Before Break,
Bibliographic Reference: EUR 18549 EN (2000) 52pp., EUR 8.50
Availability: Available from EUR-OP sales agents
ISBN: ISBN 92-828-9173-9
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