The U.S. Nuclear Regulatory Commission is in the process of rescinding or revising guidance and policies posted on this webpage in accordance with Executive Order 14151 Ending Radical and Wasteful Government DEI Programs and Preferencing, and Executive Order 14168 Defending Women From Gender Ideology Extremism and Restoring Biological Truth to the Federal Government. In the interim, any previously issued diversity, equity, inclusion, or gender-related guidance on this webpage should be considered rescinded that is inconsistent with these Executive Orders.

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

On this page:

Download complete document

Publication Information

Manuscript Completed: September 2024
Date Published: September 2024

Prepared by:
P. LaFlamme

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

Availability Notice

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, being seriously degraded
  • the nuclear power plant being in an unanalyzed condition that significantly degrade splant 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.

Page Last Reviewed/Updated Tuesday, September 17, 2024