ENS 57609
ENS Event | |
|---|---|
18:48 Mar 15, 2025 | |
| Title | Automatic Start of the Division III Emergency Diesel Generator |
| Event Description | The following information was provided by the licensee via phone and email:
On March 15, 2025, at 1248 CDT, Grand Gulf Nuclear Station (GGNS) was operating in mode 1 at 100 percent reactor power when a grid disturbance (degraded voltage) resulted in a valid specified system actuation (automatic start) of the division Ill emergency diesel generator (EDG). The division Ill EDG started and repowered the '17' AC safety-related electrical bus as designed. GGNS is currently in mode 1 at 100 percent reactor power. No radiological releases have occurred due to this event and no other safety system actuations occurred. This event is being reported under 10 CFR 50.72(b)(3)(iv)(A), as an event or condition that results in a valid specified system actuation due to the automatic start of the division Ill EDG on bus undervoltage due to a grid disturbance. The NRC Senior Resident Inspector has been notified. |
| Where | |
|---|---|
Grand Gulf  Mississippi (NRC Region 4) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(iv)(A), System Actuation | |
| Time - Person (Reporting Time:+-3.27 h-0.136 days <br />-0.0195 weeks <br />-0.00448 months <br />) | |
| Opened: | Mike Riehl 15:32 Mar 15, 2025 |
| NRC Officer: | Sam Colvard |
| Last Updated: | Mar 15, 2025 |
| 57609 - NRC Website
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