Section 208 of the Energy Reorganization Act of 1974 (Public Law 93-438) defines an “abnormal occurrence” (AO) as an unscheduled incident or event that the U.S. Nuclear Regulatory Commission (NRC) determines to be significant from the standpoint of public health or safety. The Federal Reports Elimination and Sunset Act of 1995 (Public Law 104-66) requires that the NRC report AOs to Congress annually in NUREG-0090, “Report to Congress on Abnormal Occurrences. An AO event description should be a clear, concise, and accurate report of what happened and must be consistent with the provisions of the Privacy Act and the Freedom of Information Act. The NRC provides guidance to Agreement State Radiation Control Programs on the information required for AO event descriptions at Agreement State-licensed facilities. For an AO event description to be included in the current fiscal year NUREG-0090, it must contain the following informational items: (1) a description of the applicable AO criteria from the appropriate section of Appendix A of NUREG-0090; (2) the date and place where the event occurred; (3) the nature and probable consequences of the event; (4) the cause or causes of the event; (5) actions taken by both the licensee and the Agreement State to prevent recurrence; and (6) and the event’s current status. The AO event description guidance contained above provides the Agreement State Radiation Control Programs the necessary tools to prepare potential AO event descriptions for submittal to the NRC via the Regional State Agreement Officer. |