Event Notification Report for August 08, 2014
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
08/07/2014 - 08/08/2014
EVENT NUMBERS
50362
Power Reactor
Event Number: 50362
Facility: PRAIRIE ISLAND
Region: 3 State: MN
Unit: [1] [2] []
RX Type: [1] W-2-LP,[2] W-2-LP
NRC Notified By: WAYNE EPPEN
HQ OPS Officer: DANIEL MILLS
Region: 3 State: MN
Unit: [1] [2] []
RX Type: [1] W-2-LP,[2] W-2-LP
NRC Notified By: WAYNE EPPEN
HQ OPS Officer: DANIEL MILLS
Notification Date: 08/13/2014
Notification Time: 17:40 [ET]
Event Date: 08/08/2014
Event Time: 10:26 [CDT]
Last Update Date: 08/13/2014
Notification Time: 17:40 [ET]
Event Date: 08/08/2014
Event Time: 10:26 [CDT]
Last Update Date: 08/13/2014
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):
CHRISTINE LIPA (R3DO)
CHRISTINE LIPA (R3DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 100 | Power Operation | 100 | Power Operation |
| 2 | N | Y | 100 | Power Operation | 100 | Power Operation |
UNANALYZED CONDITION DUE TO LACK OF APPROPRIATE FUSE PROTECTION
"Based on industry operating experience, a drawing review was performed and it was determined that the control circuits for the DC Emergency Turbine Oil Pumps for both Unit 1 and Unit 2 are not fused properly. Therefore an overload within the control circuit could result in a fire that could propagate to multiple fire areas affecting safe shutdown equipment that could be compromised, which affects the Appendix R safe shutdown analysis. Based on this information, the determination was made that this condition meets the reporting criteria for 10 CFR 50.72(b)(3)(ii)(B).
"Compensatory measures were already in place in accordance with F5 Appendix K, Fire Protection system minimum requirements, for impaired fire protection equipment. Hourly fire watches are in place in the affected locations as a result of previous conditions. The presence of the compensatory measures in addition to automatic fire detection in these fire areas ensures the protection of the equipment.
"The protection of the health and safety of the public is not affected by this issue.
"The license has notified the NRC Senior Resident Inspector."
"Based on industry operating experience, a drawing review was performed and it was determined that the control circuits for the DC Emergency Turbine Oil Pumps for both Unit 1 and Unit 2 are not fused properly. Therefore an overload within the control circuit could result in a fire that could propagate to multiple fire areas affecting safe shutdown equipment that could be compromised, which affects the Appendix R safe shutdown analysis. Based on this information, the determination was made that this condition meets the reporting criteria for 10 CFR 50.72(b)(3)(ii)(B).
"Compensatory measures were already in place in accordance with F5 Appendix K, Fire Protection system minimum requirements, for impaired fire protection equipment. Hourly fire watches are in place in the affected locations as a result of previous conditions. The presence of the compensatory measures in addition to automatic fire detection in these fire areas ensures the protection of the equipment.
"The protection of the health and safety of the public is not affected by this issue.
"The license has notified the NRC Senior Resident Inspector."