Event Report Guidelines 10 CFR 50.72(b)(3)(ii) and 10 CFR 50.73(a)(2)(ii) – Draft Report for Comment (NUREG-1022, Revision 3, Supplement 2)

This publication has been issued for public comment. Comments will be accepted until June 17, 2024. To submit comments, please see Docket ID Number NRC-2024-0037.

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Publication Information

Manuscript Completed: April 2024
Date Published: April 2024

Prepared by:
P. LaFlamme

Office of Nuclear Reactor Regulation
U.S. Nuclear Regulatory Commission
Washington, DC 20555

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Abstract

NUREG-1022, Revision 3, "Event Reporting Guidelines: 10 CFR 50.72 and 50.73," issued in January 2013, contains guidelines that the staff of the U.S. Nuclear Regulatory Commission (NRC) considers acceptable for use in meeting the requirements of Title 10 of the Code of Federal Regulations (10 CFR) 50.72, "Immediate notification requirements for operating nuclear power reactors,” and 10 CFR 50.73, "Licensee event report system." This supplement clarifies the guidance in section 3.2.4, "Degraded or Unanalyzed Condition," of NUREG-1022, Revision 3, which contains general guidance for event reporting under 10 CFR 50.72(b)(3)(ii) and 10 CFR 50.73(a)(2)(ii).

The regulations in 10 CFR 50.72(b)(3)(ii) and 10 CFR 50.73(a)(2)(ii) require reports for any event or condition that results in either of the following:

• the condition of the nuclear power plant, including its principal safety barriers, beingseriously degraded
• the nuclear power plant being in an unanalyzed condition that significantly degradesplant safety

In developing Supplement 2 to NUREG-1022, Revision 3, the NRC evaluated data on submitted and retracted event notifications and held a public meeting on August 9, 2023, to discuss this section 3.2.4 of NUREG-1022 with stakeholders. Supplement 2 provides updated guidance for nuclear power reactor licensees and can be used for evaluating and reporting degraded and unanalyzed conditions as described in 10 CFR 50.72(b)(3)(ii) and 10 CFR 50.73(a)(2)(ii). The specific guidance included in this supplement supersedes the guidance found in section 3.2.4 of NUREG-1022, Revision 3.