ENS 41205
ENS Event | |
|---|---|
22:35 Sep 18, 2004 | |
| Title | Discovery of After-The-Fact Emergency Condition (Unusual Event) |
| Event Description | At 1735, 9/18/04, Callaway Control Room received an alarm on K0008 (Fire Protection Alarm and Control Workstation) for the Communication Corridor Lobby 2047 elevation. Initial investigation found significant smoke in the area of the Communication Corridor Elevator Room. During the investigation, a report was received in the Control Room that a small fire had occurred on the roof and had been extinguished. At 1743, the Callaway Fire Brigade was activated to investigate the source of the smoke. Upon arriving at the scene, no flames were observed and the Brigade began removing visquene [plastic] to facilitate observing additional areas within the room. At this time, small flames were observed and plant Emergency Alarm Level (EAL) 3E, 'Fire within the Protected Area boundary not extinguished within 15 minutes of verification' 15-minute time limit was entered. The fire was extinguished using a single powder type extinguisher and declared out at 1754.
At 1910, an Operator reported that the Communication Corridor fire had reflashed. The Fire Brigade was reactivated and the fire was extinguished at 1919 using a single powder type extinguisher. After determining the temperature of the elevator room ceiling was 250 degrees F, water was applied to the ceiling from inside the room and from the roof above. After verification that the fire was extinguished, a continuous fire watch was established for both the affected room and roof area. Initial evaluation of the fire event concluded that the fire was extinguished within 15 minutes of discovery, and due to the size and location of the fire, the fire did not pose any safety significance. No safety systems had been impacted, Control Room habitability was not impacted, no safety system functions were required, and no safety functions were lost. Based upon this evaluation, it was decided that in accordance with guidance provided by EAL 3E, declaration of an Unusual Event was not required. Upon further review of the event associated with NRC Integrated Inspection Report 05000483/2004004, at 0925, 11/18/04, it was determined that a fire existed from the initial alarm at 1735 and lasted longer than 15 minutes. Because the initial fire lasted longer than 15 minutes, an Unusual Event should have been declared in accordance with plant Emergency Alarm Level 3E, 'Fire within the Protected Area boundary not extinguished within 15 minutes of verification.' Per guidance given in NUREG 1022, Revision 2, Section 3.1.1, 'Immediate Notifications', an ENS notification is being made within one hour of discovery of the event. No actual declaration of the emergency class will be made since the event has been concluded and the basis for the emergency no longer exists. The licensee will inform both state and local agencies and has informed the NRC Resident Inspector. |
| Where | |
|---|---|
Callaway  Missouri (NRC Region 4) | |
| Reporting | |
| Other Unspec Reqmnt | |
| Time - Person (Reporting Time:+1451.28 h60.47 days <br />8.639 weeks <br />1.988 months <br />) | |
| Opened: | Bruce Bredeman 10:52 Nov 18, 2004 |
| NRC Officer: | Bill Gott |
| Last Updated: | Nov 18, 2004 |
| 41205 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
WEEKMONTHYEARENS 559722022-05-02T04:05:0002 May 2022 04:05:00
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