ENS 42969
ENS Event | |
|---|---|
14:34 Sep 25, 2006 | |
| Title | Invalid System Actuation - Partial Phase a Containment Isolation |
| Event Description | This 60-day telephone notification is being made under the reporting requirements specified in 10 CFR 50.73(a)(2)(iv)(A) to describe an invalid actuation partial containment Phase A isolation affecting more than one system.
On 09/25/2006 at approximately 1034 hours0.012 days <br />0.287 hours <br />0.00171 weeks <br />3.93437e-4 months <br />, while in MODE 6, 'Refueling Operations' with no core alterations in progress, a partial Containment Phase 'A' Isolation occurred without a valid initiating signal from the Train 'A' Solid State Protection System. All components responded as designed and Operations verified stable conditions in accordance with plant operating procedures. The following components were actuated: 1-XCR-100, Containment Air Supply Header No. 2 Containment Isolation Valve, 1-XCR-102, Control Air Supply Header No. 1 Containment Isolation Valve, 1-VCR-11, Glycol to Air Handling Units, 1-VCR-21, Glycol from Air Handling Units, 1-DCR-600, Containment Sumps to Dirty Waste Hold-up Tank Containment Isolation Valve, 1-DCR-610, Ice Condenser Fans Cooler Units Drain to WDS Containment Isolation Valve, 1-CCR-455, CCW to Reactor Support Coolers Containment Isolation Valve, 1-QCR-919, Demin Water to Containment Isolation Valve, 1-QRV-51, Pressurizer Auxiliary Spray Line from CVCS Isolation Valve, 1-QRV-61, Alternate Charging Line to Cold Leg 1 Isolation Valve, 1-QRV-62, Normal Charging Line to Cold Leg 4 Isolation Valve. All components responded as expected. The remaining Phase 'A' components did not actuate because they had been previously removed from service. This event was caused by an intermittent electrical connection at Universal Logic Card A313 receptacle and a failed A213 card. The inadequate receptacle spring tension on the A313 card has been corrected, and the failed A213 card has been replaced. There were no safety consequences or impacts on the health and safety of the public. The event has been entered into the Donald C. Cook Nuclear Plant's corrective action program. The NRC Senior Resident was notified of this report, time 1220, 11/7/06. |
| Where | |
|---|---|
Cook  Michigan (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.73(a)(1), Submit an LER, Invalid Actuation | |
| Time - Person (Reporting Time:+1029.7 h42.904 days <br />6.129 weeks <br />1.41 months <br />) | |
| Opened: | Dale Turinetti 13:16 Nov 7, 2006 |
| NRC Officer: | Bill Gott |
| Last Updated: | Nov 7, 2006 |
| 42969 - NRC Website
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WEEKMONTHYEARENS 429692006-09-25T14:34:00025 September 2006 14:34:00
[Table view]10 CFR 50.73(a)(1), Submit an LER Invalid System Actuation - Partial Phase a Containment Isolation 2006-09-25T14:34:00 | |