Event Notification Report for September 25, 2005
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
09/24/2005 - 09/25/2005
EVENT NUMBERS
42013
!!!!! THIS EVENT HAS BEEN RETRACTED !!!!!
!!!!! THIS EVENT HAS BEEN RETRACTED !!!!!
Power Reactor
Event Number: 42013
Facility: MONTICELLO
Region: 3 State: MN
Unit: [1] [] []
RX Type: [1] GE-3
NRC Notified By: CURT ARNDT
HQ OPS Officer: JOHN MacKINNON
Region: 3 State: MN
Unit: [1] [] []
RX Type: [1] GE-3
NRC Notified By: CURT ARNDT
HQ OPS Officer: JOHN MacKINNON
Notification Date: 09/25/2005
Notification Time: 19:49 [ET]
Event Date: 09/25/2005
Event Time: 14:10 [CDT]
Last Update Date: 11/11/2005
Notification Time: 19:49 [ET]
Event Date: 09/25/2005
Event Time: 14:10 [CDT]
Last Update Date: 11/11/2005
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(ii)(B) - UNANALYZED CONDITION
10 CFR Section:
50.72(b)(3)(ii)(B) - UNANALYZED CONDITION
Person (Organization):
HIRONORI PETERSON (R3)
HIRONORI PETERSON (R3)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 100 | Power Operation | 100 | Power Operation |
DEGRADATION IN FIRE BARRIER DISCOVERED DURING AN INSPECTION
"During an inspection of structural steel in the Emergency Filtration Train (EFT) building, it was determined that a portion of the steel did not have adequate fire retardant material protecting the steel. This condition would have compromised the 3 hour-fire barrier between the 2 divisions of the Emergency Service Water (ESW) System, impacting # 11 Emergency Diesel Generator ESW Pumps, # 13 and # 14 ESW Pumps. This condition could have resulted in the inability to establish and maintain cold shutdown conditions in the event of a fire in this area. A fire impairment was entered and an hourly fire watch was established to address this condition. All ESW divisions are presently operable."
The NRC Resident Inspector will be notified of this event by the licensee.
* * * RETRACTION FROM SCHREIFELS TO HUFFMAN AT 15:45 EST ON 11/11/05 * * *
"Monticello is retracting the event notification based on further investigation of the issue. The station has completed calculations that confirm the affected steel beams are not required to maintain fire barrier integrity. Further, the fire severity in the zone will not cause the steel beams to fail. Therefore, the ability of the station to establish and maintain cold shutdown conditions in the event of a fire in this area was not impacted. Based on this information, Monticello has determined there was no unanalyzed condition as reported in Event Notification # 42013. The degraded fire retardant material has been replaced."
The licensee notified the NRC Resident Inspector.
"During an inspection of structural steel in the Emergency Filtration Train (EFT) building, it was determined that a portion of the steel did not have adequate fire retardant material protecting the steel. This condition would have compromised the 3 hour-fire barrier between the 2 divisions of the Emergency Service Water (ESW) System, impacting # 11 Emergency Diesel Generator ESW Pumps, # 13 and # 14 ESW Pumps. This condition could have resulted in the inability to establish and maintain cold shutdown conditions in the event of a fire in this area. A fire impairment was entered and an hourly fire watch was established to address this condition. All ESW divisions are presently operable."
The NRC Resident Inspector will be notified of this event by the licensee.
* * * RETRACTION FROM SCHREIFELS TO HUFFMAN AT 15:45 EST ON 11/11/05 * * *
"Monticello is retracting the event notification based on further investigation of the issue. The station has completed calculations that confirm the affected steel beams are not required to maintain fire barrier integrity. Further, the fire severity in the zone will not cause the steel beams to fail. Therefore, the ability of the station to establish and maintain cold shutdown conditions in the event of a fire in this area was not impacted. Based on this information, Monticello has determined there was no unanalyzed condition as reported in Event Notification # 42013. The degraded fire retardant material has been replaced."
The licensee notified the NRC Resident Inspector.