ENS 51257
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ENS Event | |
|---|---|
18:57 Jul 23, 2015 | |
| Title | Auxiliary Feedwater Manual Start Due to Loss of Main Feedwater Pump During Plant Cooldown |
| Event Description | During plant cooldown in response to conditions reported to the NRC in Event Notification 51253, Callaway was in Mode 3 (Hot Standby) and on the way to Mode 5 (Cold Shutdown). In accordance with cooldown procedures, Callaway was operating with one Main Feedwater Pump when the pump speed unexpectedly lowered to 0 RPM. The pump was manually tripped in response to the condition. This led to a decrease in water level in the steam generators. In response, operators manually activated the Auxiliary Feedwater System. All systems and components functioned normally in response to the event, and plant operators are currently continuing the controlled shutdown from Mode 3 to Mode 5. Safety related buses are receiving normal off-site power and the grid is currently stable.
The NRC Resident Inspector was notified. |
| Where | |
|---|---|
Callaway  Missouri (NRC Region 4) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(iv)(A), System Actuation | |
| Time - Person (Reporting Time:+0.7 h0.0292 days <br />0.00417 weeks <br />9.5886e-4 months <br />) | |
| Opened: | Rob Stough 19:39 Jul 23, 2015 |
| NRC Officer: | Jeff Rotton |
| Last Updated: | Jul 23, 2015 |
| 51257 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Not Critical |
| Scram | No |
| Before | Hot Standby (0 %) |
| After | Cold Shutdown (0 %) |
WEEKMONTHYEARENS 570432024-03-22T01:56:00022 March 2024 01:56:00
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