ENS Event | |
|---|---|
18:05 Aug 23, 2011 | |
| Title | Notification of an Unusual Event Due to a Seismic Event |
| Event Description | At 1354, the Calvert Cliffs Nuclear Plant (CCNPP) felt seismic activity in the control room.
Both Unit 1 and Unit 2 maintained full power operations. At 1405 CCNPP declared an Unusual Event (UE) for Unit 1 and Unit 2. NRC Operations center was notified at 1453 via dedicated phone (CCNPP event 4189). Both Units continued to operating safely with no actuations. There were no radiological releases. An Issue Response Team (IRT) was formed and the site commenced walkdown and inspections of all systems, structures and components for possible seismic damage. All problems found will be entered into the site's Corrective Action Program (CAP) and evaluated for operability. The licensee notified the NRC Resident Inspector, State, and local government agencies.
They have terminated their Notification of Unusual Event as of 0005 EDT. The licensee has notified the NRC Resident Inspector. Notified R1DO (Krohn), IRD (Morris), DHS (Knox), FEMA (Via). |
| 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:+-3.2 h-0.133 days <br />-0.019 weeks <br />-0.00438 months <br />) | |
| Opened: | James Huber 14:53 Aug 23, 2011 |
| NRC Officer: | Howie Crouch |
| Last Updated: | Aug 24, 2011 |
| 47184 - NRC Website
Loading map... | |
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 | |