Event Notification Report for January 03, 2015
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
01/02/2015 - 01/03/2015
EVENT NUMBERS
50715
Power Reactor
Event Number: 50715
Facility: COMANCHE PEAK
Region: 4 State: TX
Unit: [1] [2] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: SAMUEL PEREZ
HQ OPS Officer: VINCE KLCO
Region: 4 State: TX
Unit: [1] [2] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: SAMUEL PEREZ
HQ OPS Officer: VINCE KLCO
Notification Date: 01/03/2015
Notification Time: 14:14 [ET]
Event Date: 01/03/2015
Event Time: 05:38 [CST]
Last Update Date: 01/03/2015
Notification Time: 14:14 [ET]
Event Date: 01/03/2015
Event Time: 05:38 [CST]
Last Update Date: 01/03/2015
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):
MICHAEL HAY (R4DO)
MICHAEL HAY (R4DO)
| 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 |
LOSS OF METEOROLOGICAL EMERGENCY ASSESSMENT CAPABILITY
"At 0538 [CST] on 01/03/2015, a partial loss of the 25KV Power Distribution System caused a loss of both the Primary and Backup Meteorological Towers at the Comanche Peak Nuclear Power Plant. This resulted in a major loss of emergency assessment capabilities in regard to meteorological conditions.
"The 25KV Plant Support Power Loop feeds certain non-safety-related support equipment and did not result in an impact to plant/unit operation.
"Meter and Relay technicians are performing ongoing investigation of the cause of the breaker trip.
"A similar incident occurred 01/02/2015 at 0314 [CST]. Reference [NRC] EN# 50713."
The licensee will notify the NRC Resident Inspector.
"At 0538 [CST] on 01/03/2015, a partial loss of the 25KV Power Distribution System caused a loss of both the Primary and Backup Meteorological Towers at the Comanche Peak Nuclear Power Plant. This resulted in a major loss of emergency assessment capabilities in regard to meteorological conditions.
"The 25KV Plant Support Power Loop feeds certain non-safety-related support equipment and did not result in an impact to plant/unit operation.
"Meter and Relay technicians are performing ongoing investigation of the cause of the breaker trip.
"A similar incident occurred 01/02/2015 at 0314 [CST]. Reference [NRC] EN# 50713."
The licensee will notify the NRC Resident Inspector.