ENS 57400
ENS Event | |
|---|---|
11:00 Oct 28, 2024 | |
| Title | Criticality Accident and Alarm System Out of Service for Testing |
| Event Description | The following information was provided by the licensee via phone and email:
The American Centrifuge Plant (ACP) Criticality Accident and Alarm System (CAAS) is designed to detect a nuclear criticality accident, and provide audible and visual alarms that alert personnel to evacuate the immediate area, as required by 10 CFR 70.24, criticality accident requirements. Periodic maintenance and testing, of the CAAS, is scheduled to commence on Monday, October 28, 2024, at approximately 0700 EDT. The maintenance and testing is expected to last approximately 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> and affect the X-3001, including the North area. The CAAS will be temporarily taken out of service and declared inoperable, to perform the periodic maintenance and testing in accordance with approved plant procedures. In accordance with License Application Section 5.4.4 compensatory measures will be implemented for the ACP. These measures include, but may not be limited to the following: � Presence of essential personnel during the maintenance and testing activities; � Evacuation of non-essential personnel from affected areas and the immediate evacuation zone prior to taking CAAS equipment out of service; � Limiting access to the area by restricting material movements, including fissile material movement, while the CAAS is inoperable; � Use of personal alarming dosimeters for personnel authorized to access the area during the CAAS outage; � Compensatory measures will remain in place until CAAS coverage is verified to be operational and the CAAS is declared operable in accordance with approved plant procedures. American Centrifuge Operating, LLC (ACO) will notify the NRC when CAAS coverage is returned to normal operation. The licensee has notified the NRC Project Manager and Region II Senior Inspector. ACP condition notification number: 12198 The Department of Energy has been notified. |
| Where | |
|---|---|
| American Centrifuge Plant Piketon, Ohio (NRC Region 2) | |
| License number: | SNM-2011 |
| Reporting | |
| 10 CFR 70.50(b)(2) | |
| Time - Person (Reporting Time:+-91.87 h-3.828 days <br />-0.547 weeks <br />-0.126 months <br />) | |
| Opened: | Mike Leonhart 15:08 Oct 24, 2024 |
| NRC Officer: | Natalie Starfish |
| Last Updated: | Oct 24, 2024 |
| 57400 - NRC Website | |
American Centrifuge Plant with 10 CFR 70.50(b)(2) | |
WEEKMONTHYEARENS 574002024-10-28T11:00:00028 October 2024 11:00:00
[Table view]10 CFR 70.50(b)(2) Criticality Accident and Alarm System Out of Service for Testing ENS 572162024-07-09T11:46:0009 July 2024 11:46:00 10 CFR 70.50(b)(2) Criticality Accident and Alarm System Out of Service for Testing ENS 566472023-08-01T13:06:0001 August 2023 13:06:00 10 CFR 70.50(b)(2) Preplanned Outage of a Required Safety Monitoring System 2024-07-09T11:46:00 | |