Document: 10 CFR Part 50
Document ID: 07c52eb1-b952-4f98-bfad-2525695d6ad5
Document Type: cfr
Title: Licensee event report system.
Source: 10 CFR Part 50
Source URL: https://www.ecfr.gov/current/title-10/part-50/section-50.73
Revision Date: 
Chapter: 
Section ID: 50.73
CFR Part: 50
CFR Title: 10

Content:
operation of the nuclear power plant including fires, toxic gas releases, or radioactive releases. ( b ) Contents. The Licensee Event Report shall contain: ( 1 ) A brief abstract describing the major occurrences during the event, including all component or system failures that contributed to the event and significant corrective action taken or planned to prevent recurrence. ( 2 ) ( i ) A clear, specific, narrative description of what occurred so that knowledgeable readers conversant with the design of commercial nuclear power plants, but not familiar with the details of a particular plant, can understand the complete event. ( ii ) The narrative description must include the following specific information as appropriate for the particular event: ( A ) Plant operating conditions before the event. ( B ) Status of structures, components, or systems that were inoperable at the start of the event and that contributed to the event. ( C ) Dates and approximate times of occurrences. ( D ) The cause of each component or system failure or personnel error, if known. ( E ) The failure mode, mechanism, and effect of each failed component, if known. ( F ) The Energy Industry Identification System component function identifier and system name of each component or system referred to in the LER. ( 1 ) The Energy Industry Identification System is defined in: IEEE Std 803-1983 (May 16, 1983) Recommended Practice for Unique Identification in Power Plants and Related Facilities—Principles and Definitions. ( 2 ) IEEE Std 803-1983 has been approved for incorporation by reference by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51 . ( 3 ) A notice of any changes made to the material incorporated by reference will be published in the Federal Register. Copies may be obtained from the Institute of Electrical and Electronics Engineers, 445 Hoes Lane, P.O. Box 1331, Piscataway, NJ 08855-1331. IEEE Std 803-1983 is available for inspection at the NRC's