Title: Summary Report of Events related to Design Deficiency
Publisher: Publications Office of the European Union
Publication Year: 2017
JRC N°: JRC107453
ISBN: 978-92-79-71480-1
ISSN: 1831-9424
Other Identifiers: EUR 28719 EN
OP KJ-NA-28719-EN-N
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC107453
DOI: 10.2760/006508
Type: EUR - Scientific and Technical Research Reports
Abstract: This summary report presents the results of a comprehensive study described in the topical study ‘Events related to design deficiency’. The study has been conducted to review the recent worldwide operating experience and to draw from it the lessons learned and recommendations to improve the safety performance of nuclear power plants (NPPs). The work covers all kinds of commercial power reactors currently or recently in operation and all off-power modes of operation. The sources of operating experience for the study are the international reporting system for operating experience (IRS) database, the licensee event reports (LERs) of the United States Nuclear Regulatory Commission (US NRC), the French operational experience database Sapide and the German operational experience database VERA. Thousands of event reports were screened to select those more relevant for the objectives of the study. This resulted in a list of 774 event reports. After different approaches applied in examining pre-defined categories and families of events, it was concluded that six common major issues could be defined to present the areas of concern in the best way. Accordingly, the 29 recommendations from this study are distributed under these topics: unanalysed conditions, instrumentation and control, robustness of design, ageing, internal and external hazards, and quality of documentation. These recommendations are expected to help the licensees and the regulatory authorities to recognise latent weaknesses dating from the design phases of the NPPs, before the start of NPP operation, and perform adequate measures to prevent the occurrence of events similar to those described in this report. The report can also be used as a good reference for new NPP construction projects.
JRC Directorate:Nuclear Safety and Security

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