The availability and operability of the EDGs is acknowledged as crucial for NPP safety during plant operation as well as during outages. The Stress Tests conducted in the European Union Countries following the Fukushima accident showed the importance of EDG as the vital stand-by source of AC electrical power. In that direction, a Topical Operation Experience Report on Events related to Emergency Diesel Generators [2] was generated. This topical report aims at analysing operating experience for the past twenty years and identifying events that involved faults of EDG due to various types of failures. The selected operating experience contained in event reports was further analysed in order to identify type of failure, attributes that contributed to the failure, EDG failure mode potential or real, discuss risk relevance, provide recommendations and summarize important lessons learned.
A time span of about 20 years was used to identify EDG related events. Four different databases (GRS, IRSN, IRS and U.S. NRC) were screened for relevant EDG-related events. Based on the different statistical analysis performed, a list of general recommendations related to specific issues identified by analysing the OE was generated. These recommendations were grouped in 6 main areas: preventive maintenance and testing; manufacturing and spare parts; operating experience feedback; protective devices; reliability; external events. At the end of the report, a table summarizing specific lessons learned is provided.
KANCEV Dusko;
DUCHAC Alexander;
2013-10-07
Publications Office of the European Union
JRC83672
978-92-79-32361-4 (print),
978-92-79-32360-7,
1018-5593 (print),
1831-9424 (online),
EUR 26055,
OP LD-NA-26055-EN-C (print),
OP LD-NA-26055-EN-N (online),
https://publications.jrc.ec.europa.eu/repository/handle/JRC83672,
10.2790/89222 (print),
10.2790/8893 (online),
