ENS Event | |
|---|---|
11:30 Feb 19, 2009 | |
| Title | Power Supply Failure Resulting in a Tech Spec Required Shutdown |
| Event Description | The plant was operating in MODE 1 at 100% power. At 0228 on 2/19/09, a power supply to cabinet SA036D, Channel 1 of the Engineered Safety Features Actuation System (ESFAS) failed. As a result of the failure, both trains of control room ventilation isolation signal (CRVIS), containment purge isolation signal (CPIS), and fuel building isolation signal (FBIS) inadvertently actuated. The cause of the failure of SA036D is under investigation. Technical Specification (TS) Action 3.3.2.Q was entered which requires the plant to be in MODE 3 in 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and MODE 4 in 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />. Load reduction began at 0530. MODE 2 was entered at 0750. MODE 3 was entered at 0817.
All systems functioned properly. The NRC Resident Inspector has been notified. The licensee is replacing the entire power supply and will investigate the cause. |
| Where | |
|---|---|
Callaway  Missouri (NRC Region 4) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown | |
| Time - Person (Reporting Time:+-1.38 h-0.0575 days <br />-0.00821 weeks <br />-0.00189 months <br />) | |
| Opened: | David Lantz 10:07 Feb 19, 2009 |
| NRC Officer: | Mark Abramovitz |
| Last Updated: | Feb 19, 2009 |
| 44863 - NRC Website
Loading map... | |
Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Hot Standby (0 %) |
WEEKMONTHYEARENS 512532015-07-23T06:15:00023 July 2015 06:15:00
[Table view]10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Initiation of Plant Shutdown Due to Rcs Leakage ENS 448632009-02-19T11:30:00019 February 2009 11:30:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Power Supply Failure Resulting in a Tech Spec Required Shutdown ENS 417812005-06-17T00:02:00017 June 2005 00:02:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Unit Commenced a Tech Spec Required Shutdown Due to an Electrical Problem Affecting a Safety Related Battery ENS 415272005-03-26T09:00:00026 March 2005 09:00:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Required Shutdown Due to Inoperable Esw Train. ENS 402632003-10-21T06:00:00021 October 2003 06:00:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Plant Shutdown Required by Technical Specifications 2015-07-23T06:15:00 | |