ENS 57305

v t e 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.

ENS 57305 +/-
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
v • d • e

v t e Emergency Notification System
Southern California Edison Company with 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release
WEEKMONTHYEAR2025-11-05T19:09:00 [Table view]
[ENS list for Southern California Edison Company]

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