ENS Event | |
|---|---|
15:00 Sep 5, 2024 | |
| Title | Offsite Agency Notification of LOW-LEVELS of Tritium Detected in Groundwater |
| Event Description | The following information was provided by the licensee via phone and email:
On September 5, 2024, Southern California Edison reported, as a proactive measure, detectable levels of tritium in onsite groundwater wells to offsite government agencies. The tritium levels do not exceed reporting thresholds in the [Nuclear Energy Institute's] NEI 07-07 communication protocol, the offsite dose calculation manual, nor the NRC regulations in 10 CFR Part 20. Offsite ocean water samples have not identified the presence of tritium above detectable levels. An investigation is currently ongoing to determine the source of tritium and determine mitigative actions, if any. This notification is being made solely as a four-hour, non-emergency notification for a notification of another government agency. This event is reportable in accordance with 10 CFR 50.72(b)(2)(xi). There was no impact on the health and safety of the public or plant personnel. The NRC regional inspector will be notified. |
| Where | |
|---|---|
| Southern California Edison Company San Clemente, California (NRC Region 4) | |
| License number: | GL |
| Organization: | San Onofre |
| Reporting | |
| 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | |
| Time - Person (Reporting Time:+-3.9 h-0.163 days <br />-0.0232 weeks <br />-0.00534 months <br />) | |
| Opened: | Guadalupe Robles 11:06 Sep 5, 2024 |
| NRC Officer: | Robert A. Thompson |
| Last Updated: | Sep 5, 2024 |
| 57305 - NRC Website | |
Southern California Edison Company with 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | |
WEEKMONTHYEARENS 580272025-11-05T19:09:0005 November 2025 19:09:00
[Table view]10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification ENS 573052024-09-05T15:00:0005 September 2024 15:00:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Agency Notification of LOW-LEVELS of Tritium Detected in Groundwater ENS 572022024-07-01T14:34:0001 July 2024 14:34:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification for Reported Leak ENS 561322022-09-29T23:05:00029 September 2022 23:05:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification for Pollutant Discharge 2025-11-05T19:09:00 | |