Event Notification Report for January 18, 2015
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
01/17/2015 - 01/18/2015
EVENT NUMBERS
50743
Power Reactor
Event Number: 50743
Facility: DUANE ARNOLD
Region: 3 State: IA
Unit: [1] [] []
RX Type: [1] GE-4
NRC Notified By: DOUG PETERSON
HQ OPS Officer: JEFF ROTTON
Region: 3 State: IA
Unit: [1] [] []
RX Type: [1] GE-4
NRC Notified By: DOUG PETERSON
HQ OPS Officer: JEFF ROTTON
Notification Date: 01/19/2015
Notification Time: 02:30 [ET]
Event Date: 01/18/2015
Event Time: 21:31 [CST]
Last Update Date: 01/21/2015
Notification Time: 02:30 [ET]
Event Date: 01/18/2015
Event Time: 21:31 [CST]
Last Update Date: 01/21/2015
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(xiii) - LOSS COMM/ASMT/RESPONSE
10 CFR Section:
50.72(b)(3)(xiii) - LOSS COMM/ASMT/RESPONSE
Person (Organization):
HIRONORI PETERSON (R3DO)
HIRONORI PETERSON (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 |
LOSS OF NORMAL TECHNICAL SUPPORT CENTER POWER
"At 2131 CST on January 18, the Duane Arnold Energy Center [DAEC] Technical Support Center (TSC) Normal Power was lost when a single phase to the T4 '36KV-12.5KV DAEC SITE TRANSFORMER' was lost due to a blown primary side fuse. Automatic power transfer occurred to maintain power to the TSC from the TSC Emergency Diesel Generator (EDG) which automatically started. The TSC remained functional throughout the incident.
"This notification is being made pursuant to 10 CFR 50.72(b)(3)(xiii) due to the loss of an emergency assessment capability. An update will be provided once the normal power supply has been restored."
The licensee notified the NRC Resident Inspector.
* * * UPDATE FROM DOUG PETERSON TO VINCE KLCO AT 1419 EST AT 1/21/15 * * *
Normal power restored to the TSC.
The licensee notified the NRC Resident Inspector.
Notified the R3DO (Duncan).
"At 2131 CST on January 18, the Duane Arnold Energy Center [DAEC] Technical Support Center (TSC) Normal Power was lost when a single phase to the T4 '36KV-12.5KV DAEC SITE TRANSFORMER' was lost due to a blown primary side fuse. Automatic power transfer occurred to maintain power to the TSC from the TSC Emergency Diesel Generator (EDG) which automatically started. The TSC remained functional throughout the incident.
"This notification is being made pursuant to 10 CFR 50.72(b)(3)(xiii) due to the loss of an emergency assessment capability. An update will be provided once the normal power supply has been restored."
The licensee notified the NRC Resident Inspector.
* * * UPDATE FROM DOUG PETERSON TO VINCE KLCO AT 1419 EST AT 1/21/15 * * *
Normal power restored to the TSC.
The licensee notified the NRC Resident Inspector.
Notified the R3DO (Duncan).