ENS Event | |
|---|---|
08:45 Apr 2, 2010 | |
| Title | Unit Commenced Shutdown After Declaring Motor-Driven Emergency Feedwater System Inoperable |
| Event Description | At 0445 [EDT], VC Summer Nuclear Station commenced a shutdown required by Technical Specification 3.7.1.2 Action b. FCV 03541-EF, emergency motor driven feedwater flow control valve 'B', was declared inoperable due to the failure of Surveillance Requirement 4.7.1.2.b at 0154 [EDT]. In accordance with 3.7.1.2 Action b, hot standby is required to be achieved within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> (0754 EDT). At approximately 87% power, FCV 03541-EF was repaired and the associated Technical Specification was exited at 0608 [EDT]. The power descent has been stopped, and all systems are functioning as required.
The licensee will inform state/local agencies and has informed the NRC Resident Inspector. |
| Where | |
|---|---|
Summer  South Carolina (NRC Region 2) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown | |
| Time - Person (Reporting Time:+-1.28 h-0.0533 days <br />-0.00762 weeks <br />-0.00175 months <br />) | |
| Opened: | Jason Weathersby 07:28 Apr 2, 2010 |
| NRC Officer: | Steve Sandin |
| Last Updated: | Apr 2, 2010 |
| 45806 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (87 %) |
WEEKMONTHYEARENS 458062010-04-02T08:45:0002 April 2010 08:45:00
[Table view]10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Unit Commenced Shutdown After Declaring Motor-Driven Emergency Feedwater System Inoperable ENS 406282004-03-30T16:29:00030 March 2004 16:29:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation, 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown, 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded Automatic Reactor Trip Due to Lo-Lo Steam Generator Level 2010-04-02T08:45:00 | |