ENS Event | |
|---|---|
07:00 Jul 26, 2018 | |
| Title | Disabled Ventilation System |
| Event Description | On 7/26/18 at approximately 1355 PDT, the Building 103 laboratory facility ventilation exhaust system was disabled during a scheduled evacuation drill at the Vallecitos Nuclear Center (VNC).
The system was restored on 7/26/18 at approximately 1407 PDT. There were no active fissile material operations in Building 103, thus no unsafe condition existed, and no release of material occurred. This event is being reported pursuant to the requirements of 10 CFR 70.50 (b)(2). The licensee will notify the NRC Region 4 office.
EN53527, made July 27, 2018, reported an event in accordance with 10CFR70.50(b)(2) in which the Vallecitos Nuclear Center Building 103 facility ventilation exhaust system was disabled for approximately 12 minutes. At the time of the report, information regarding the special nuclear material (SNM) in the affected Building 103 areas was not available and a conservative decision was made that the ventilation system was required to prevent releases or exposures to radioactive materials exceeding regulatory limits or to mitigate the consequences of an accident. Based on a subsequent review of SNM inventory records and additional survey measurements, it has been determined the event report should be retracted due to the minimal amount of SNM that could have been affected. Notified R4 Fuel Cycle Decommissioning Branch and NMSS Enrichment and Conversion Branch. Notified R4DO (Vasquez) and NMSS Events Notification (email). |
| Where | |
|---|---|
| General Electric Co. Pleasanton, California (NRC Region 4) | |
| License number: | SNM-960 |
| Reporting | |
| Part 70 App A (B)(2) | |
| Time - Person (Reporting Time:+30 h1.25 days <br />0.179 weeks <br />0.0411 months <br />) | |
| Opened: | Scott Murray 13:00 Jul 27, 2018 |
| NRC Officer: | Andrew Waugh |
| Last Updated: | Aug 7, 2018 |
| 53527 - NRC Website | |
General Electric Co. with Part 70 App A (B)(2) | |
WEEKMONTHYEARENS 535272018-07-26T07:00:00026 July 2018 07:00:00
[Table view]Part 70 App A (B)(2) Disabled Ventilation System 2018-07-26T07:00:00 | |