ENS Event | |
|---|---|
12:39 Dec 15, 2011 | |
| Title | Dual Unit Technical Specification 3.0.3 Required Shutdown Due to Loss of Control Room Chillers |
| Event Description | Control room area chilled water system 'B' train tripped while control room area chilled water system 'A' train was isolated for maintenance. Unit 1 and Unit 2 entered technical specification 3.0.3 at 0739 EST. Unit 1 shutdown commenced at 1030 EST. Unit 2 shutdown is scheduled to commence at 1100 EST. This plant condition also requires a notification under 10CFR50.72(b)(3)(v).
The licensee is investigating the cause of the trip on the 'B' train and is taking actions to restore the 'A' train to service and exit the shutdown. The electrical lineup is normal and all safety systems are operable. The NRC Resident Inspector has been notified. The states of North Carolina and South Carolina will be notified. Local county governments of York, Gaston, and Mecklenberg counties will also be notified. |
| Where | |
|---|---|
Catawba  South Carolina (NRC Region 2) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown | |
| Time - Person (Reporting Time:+-1.97 h-0.0821 days <br />-0.0117 weeks <br />-0.0027 months <br />) | |
| Opened: | Steve Christopher 10:41 Dec 15, 2011 |
| NRC Officer: | Joe O'Hara |
| Last Updated: | Dec 15, 2011 |
| 47525 - NRC Website
Loading map... | |
Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (99 %) |
Unit 2 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
WEEKMONTHYEARENS 575172025-01-28T13:32:00028 January 2025 13:32:00
[Table view]10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Required Shutdown ENS 475252011-12-15T12:39:00015 December 2011 12:39:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Dual Unit Technical Specification 3.0.3 Required Shutdown Due to Loss of Control Room Chillers ENS 400812003-08-16T11:53:00016 August 2003 11:53:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Unit 2 Commenced a Shutdown After Entering Tech Spec 3.0.3 2025-01-28T13:32:00 | |