ENS Event | |
|---|---|
18:23 Mar 8, 2018 | |
| Title | 60-Day Optional Telephonic Notification for an Invalid Edg Start During Outage Testing |
| Event Description | On March 8, 2018, an invalid system actuation occurred while preparations were underway to perform Safety Features Actuation System (SFAS) integrated response time surveillance testing during the recent Davis Besse Nuclear Power Station refueling outage. Several minutes after connecting a data recorder to monitor the Emergency Diesel Generator (EDG) 1 start signal, at 1323 hours0.0153 days <br />0.368 hours <br />0.00219 weeks <br />5.034015e-4 months <br /> [EST], the EDG started with no valid actuation signals or test inputs present. The EDG successfully came up to speed and voltage as expected. The associated essential 4160 volt electrical bus remained energized from the normal power supply, therefore, the EDG output breaker did not close to supply power to the bus. Troubleshooting determined the inadvertent actuation was due to a short in the test lead wires at the recorder connection caused by a faulty test lead. The test lead was replaced and the SFAS surveillance testing completed satisfactorily.
This event is being reported as an invalid system actuation per 10 CFR 50.73(a)(2)(iv)(A); this 60-day optional telephone notification is being made per 10 CFR 50.73(a)(i) in lieu of submitting a written Licensee Event Report. The NRC Resident Inspector was notified of the inadvertent EDG start at the time of the event and has been notified of this invalid specified system actuation notification. |
| Where | |
|---|---|
Davis Besse  Ohio (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.73(a)(1), Submit an LER, Invalid Actuation | |
| Time - Person (Reporting Time:+1363.45 h56.81 days <br />8.116 weeks <br />1.868 months <br />) | |
| Opened: | Bill Rayburn 12:50 May 4, 2018 |
| NRC Officer: | Dong Park |
| Last Updated: | May 4, 2018 |
| 53381 - NRC Website | |
WEEKMONTHYEARENS 533812018-03-08T18:23:0008 March 2018 18:23:00
[Table view]10 CFR 50.73(a)(1), Submit an LER 60-Day Optional Telephonic Notification for an Invalid Edg Start During Outage Testing 2018-03-08T18:23:00 | |