Event Notification Report for October 10, 2014
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
10/09/2014 - 10/10/2014
EVENT NUMBERS
50523
!!!!! THIS EVENT HAS BEEN RETRACTED !!!!!
!!!!! THIS EVENT HAS BEEN RETRACTED !!!!!
Power Reactor
Event Number: 50523
Facility: PRAIRIE ISLAND
Region: 3 State: MN
Unit: [1] [2] []
RX Type: [1] W-2-LP,[2] W-2-LP
NRC Notified By: STEVE INGALLS
HQ OPS Officer: JOHN SHOEMAKER
Region: 3 State: MN
Unit: [1] [2] []
RX Type: [1] W-2-LP,[2] W-2-LP
NRC Notified By: STEVE INGALLS
HQ OPS Officer: JOHN SHOEMAKER
Notification Date: 10/11/2014
Notification Time: 00:03 [ET]
Event Date: 10/10/2014
Event Time: 17:17 [CDT]
Last Update Date: 11/18/2014
Notification Time: 00:03 [ET]
Event Date: 10/10/2014
Event Time: 17:17 [CDT]
Last Update Date: 11/18/2014
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):
ROBERT ORLIKOWSKI (R3DO)
ROBERT ORLIKOWSKI (R3DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | N | 0 | Cold Shutdown | 0 | Cold Shutdown |
| 2 | N | Y | 100 | Power Operation | 100 | Power Operation |
MISSING FIRE BARRIER
"During a Fire Penetration walkdown, an opening less than 1 [inch] tall under a duct was identified between the Train B Aux Feedwater Pump (AFWP) Room (Unit 1 side) and the Bus150/160 room. This constitutes a missing fire barrier between Fire Area (FA) 32 and FA 37 such that the required degree of separation for redundant safe shutdown trains is lacking.
"A firewatch has been established on the Unit 1 side of the AFWP Room and Bus 150/160 room. The compensatory fire watch will remain in place per F5 Appendix K until the fire barrier is returned to full functional status.
"The discovery of this non-compliance is being reported as an unanalyzed condition as defined by 10CFR50.72(b)(3)(ii)(B).
"The protection of the health and safety of the public was not affected by this issue.
"The licensee has notified the NRC Resident Inspector of this event."
* * * RETRACTION FROM DOUG LARSON TO DANIEL MILLS AT 2118 EST ON 11/18/2014 * * *
"Northern States Power Company (NSPM) has determined that the opening under the duct is not separating redundant equipment and no longer meets the regulatory definition of an unanalyzed condition. This was identified when it was determined that the redundant pressurizer heater cables credited for safe shutdown were routed through the same fire area. This was reported under EN 50531 (Unanalyzed Condition Due To Missing Fire Barrier). Since the missing fire barrier does not separate redundant equipment, the condition does not degrade plant safety, and is no longer reportable.
"The protection of the health and safety of the public was not affected by this issue.
"The licensee has notified the NRC Resident Inspector."
Notified R3DO (Peterson).
"During a Fire Penetration walkdown, an opening less than 1 [inch] tall under a duct was identified between the Train B Aux Feedwater Pump (AFWP) Room (Unit 1 side) and the Bus150/160 room. This constitutes a missing fire barrier between Fire Area (FA) 32 and FA 37 such that the required degree of separation for redundant safe shutdown trains is lacking.
"A firewatch has been established on the Unit 1 side of the AFWP Room and Bus 150/160 room. The compensatory fire watch will remain in place per F5 Appendix K until the fire barrier is returned to full functional status.
"The discovery of this non-compliance is being reported as an unanalyzed condition as defined by 10CFR50.72(b)(3)(ii)(B).
"The protection of the health and safety of the public was not affected by this issue.
"The licensee has notified the NRC Resident Inspector of this event."
* * * RETRACTION FROM DOUG LARSON TO DANIEL MILLS AT 2118 EST ON 11/18/2014 * * *
"Northern States Power Company (NSPM) has determined that the opening under the duct is not separating redundant equipment and no longer meets the regulatory definition of an unanalyzed condition. This was identified when it was determined that the redundant pressurizer heater cables credited for safe shutdown were routed through the same fire area. This was reported under EN 50531 (Unanalyzed Condition Due To Missing Fire Barrier). Since the missing fire barrier does not separate redundant equipment, the condition does not degrade plant safety, and is no longer reportable.
"The protection of the health and safety of the public was not affected by this issue.
"The licensee has notified the NRC Resident Inspector."
Notified R3DO (Peterson).