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| Entered date | Event description | |
|---|---|---|
| ENS 57053 | 26 March 2024 16:21:00 | The following information was provided by the licensee via phone and email: On March 26, 2024 at 1115 CDT, Grand Gulf Nuclear Station experienced an actuation of the reactor protection system (RPS) due to high reactor coolant system pressure. The plant was in Mode 4 at zero percent power and performing scram time testing. All rods were fully inserted at the time of the RPS actuation, and all required equipment responded as designed. This actuation is being reported in accordance with 10 CFR 50.72(b)(3)(iv)(A). The cause of the event is under investigation. The NRC resident inspector has been notified. |
| ENS 55451 | 9 September 2021 04:19:00 | At 0033 CDT on September 9, 2021, Grand Gulf Nuclear Station (GGNS) was operating at 70 percent power when the High Pressure Core Spray (HPCS) was declared inoperable. The inoperability determination was made due to control room annunciations. In accordance with GGNS Technical Specification 3.5.1.B.1, the Reactor Core Isolation Cooling system was verified to be operable. Troubleshooting is in progress. This event is being reported in accordance with 10 CFR 50.72(b)(3)(v)(D) as an event or condition which could have prevented the fulfillment of a safety function. The NRC Resident Inspector has been notified. |