ENS 46276
ENS Event | |
|---|---|
14:58 Sep 24, 2010 | |
| Title | Unusual Event Declared Based On Short Duration Loss Of Security Equipment |
| Event Description | The licensee declared an Unusual Event at 1053 EDT based on a short duration loss of a security system. The basis for the Unusual Event is Emergency Action Level (EAL AU6.1.1.) for a security process issue. Compensatory issues were implemented. The equipment has been restored and proper function is being verified.
The licensee has notified the NRC Resident Inspector, State and local authorities. Contact the HOO for additional details.
The licensee exited the Unusual Event at 1315 EDT on 9/23/2010. Notified the R1DO (Dentel), NRREO (Lee), IRD (Marshall), ILTAB (Pearson), DHS (Hill), FEMA (Biscoe), and 73.71 group (e-mail).
While performing planned maintenance on the security computer, the computer unexpectedly froze. As a result, compensatory actions were implemented and a site unusual event was declared. Further review has determined that the security event was misclassified. The security computer froze due to equipment malfunction caused by a hardware issue, not a security threat. Unusual event criteria was not met. Therefore, this notification is being retracted. This event has been entered in our corrective action program. The NRC Resident Inspector has been notified." Notified the R1DO (Gray). |
| Where | |
|---|---|
Calvert Cliffs  Maryland (NRC Region 1) | |
| Reporting | |
| Emergency class: | Unusual Event |
| 10 CFR 50.72(a) (1) (i), Emergency Class Declaration | |
| Time - Person (Reporting Time:+-3.67 h-0.153 days <br />-0.0218 weeks <br />-0.00503 months <br />) | |
| Opened: | Kevin Dougherty 11:18 Sep 24, 2010 |
| NRC Officer: | Bill Huffman |
| Last Updated: | Sep 29, 2010 |
| 46276 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
Unit 2 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
WEEKMONTHYEARENS 472082011-08-28T03:02:00028 August 2011 03:02:00
[Table view]10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(a)(1)(i), Emergency Class Declaration, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Unusual Event - Transformer Explosion Near Turbine Building ENS 471842011-08-23T18:05:00023 August 2011 18:05:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Notification of an Unusual Event Due to a Seismic Event ENS 462762010-09-24T14:58:00024 September 2010 14:58:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Based on Short Duration Loss of Security Equipment ENS 440042008-02-23T08:14:00023 February 2008 08:14:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Due to High Dose Equivalent Iodine Greater than Tech Spec Requirement 2011-08-28T03:02:00 | |