Event Notification Report for December 08, 2013
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
12/07/2013 - 12/08/2013
Power Reactor
Event Number: 49616
Facility: PALO VERDE
Region: 4 State: AZ
Unit: [1] [2] [3]
RX Type: [1] CE,[2] CE,[3] CE
NRC Notified By: JASON HILL
HQ OPS Officer: JEFF ROTTON
Region: 4 State: AZ
Unit: [1] [2] [3]
RX Type: [1] CE,[2] CE,[3] CE
NRC Notified By: JASON HILL
HQ OPS Officer: JEFF ROTTON
Notification Date: 12/08/2013
Notification Time: 10:53 [ET]
Event Date: 12/08/2013
Event Time: 08:00 [MST]
Last Update Date: 12/12/2013
Notification Time: 10:53 [ET]
Event Date: 12/08/2013
Event Time: 08:00 [MST]
Last Update Date: 12/12/2013
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 VASQUEZ (R4DO)
WILLIAM COOK (R1DO)
MICHAEL VASQUEZ (R4DO)
WILLIAM COOK (R1DO)
| 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 | N | 0 | Cold Shutdown | 0 | Cold Shutdown |
| 3 | N | Y | 100 | Power Operation | 100 | Power Operation |
LOSS OF ASSESSMENT DUE TO TECHNICAL SUPPORT CENTER UNINTERRUPTABLE POWER SUPPLY PLANNED REPLACEMENT
"The following event description is based on information currently available. If through subsequent reviews of this event additional information is identified that is pertinent to this event or alters the information being provided at this time a follow-up notification will be made via the ENS or under the reporting requirements of 10CFR50.73.
"At approximately 0800 Mountain Standard Time on December 8, 2013, Palo Verde Nuclear Generating Station (PVNGS) removed the Technical Support Center (TSC) uninterruptable power supply (UPS) from service for a planned replacement. The outage disables the Emergency Response Facility Data Acquisition and Display System (ERFDADS) inside the TSC, remote meteorological data display in the emergency response facilities and control rooms, and transmission of plant data to the Emergency Operations Facility (EOF) and to the NRC's Emergency Response Data System (ERDS). The outage is expected to be completed within five days.
"The TSC and EOF remain functional during the outage. The outage does not affect the availability of normal power to the TSC or back-up power from the TSC diesel generator. Existing telecommunication systems provided for the emergency response organization (ERO) remain functional to provide the ERO within the TSC and EOF the necessary emergency assessment capabilities, as described in the PVNGS Emergency Plan. The ERFDADS system in each of the three unit control rooms and unit satellite TSCs remain functional and are not affected by the TSC UPS outage. Compensatory measures exist within emergency plan implementing procedures to obtain meteorological tower data locally and from the National Weather Service.
"The ERO has been briefed on the effects of the planned TSC UPS outage.
"The NRC Resident Inspector has been informed.
"PVNGS will inform the NRC after the outage has been completed and the functionality of affected equipment has
been restored."
* * * UPDATE FROM DAVE HECKMAN TO HOWIE CROUCH AT 1632 EST ON 12/12/13 * * *
"The following event description is based on information currently available. If through subsequent reviews of this event, additional information is identified that is pertinent to this event or alters the information being provided at this time, a follow-up notification will be made via the ENS or under the reporting requirements of 10CFR50.73.
"This notification is an update to EN 49616 which provided notification of pre-planned maintenance activities on the Palo Verde Nuclear Generating Station (PVNGS) Technical Support Center (TSC) uninterruptable power supply (UPS) that disabled various Emergency Plan (E-Plan) data systems.
"At approximately 0915 Mountain Standard Time on December 12, 2013, PVNGS restored the affected data systems to service such that the functions of the E-Plan can now be performed without the use of alternate methods.
"The NRC Resident Inspector has been informed. "
Notified R4DO (Werner).
"The following event description is based on information currently available. If through subsequent reviews of this event additional information is identified that is pertinent to this event or alters the information being provided at this time a follow-up notification will be made via the ENS or under the reporting requirements of 10CFR50.73.
"At approximately 0800 Mountain Standard Time on December 8, 2013, Palo Verde Nuclear Generating Station (PVNGS) removed the Technical Support Center (TSC) uninterruptable power supply (UPS) from service for a planned replacement. The outage disables the Emergency Response Facility Data Acquisition and Display System (ERFDADS) inside the TSC, remote meteorological data display in the emergency response facilities and control rooms, and transmission of plant data to the Emergency Operations Facility (EOF) and to the NRC's Emergency Response Data System (ERDS). The outage is expected to be completed within five days.
"The TSC and EOF remain functional during the outage. The outage does not affect the availability of normal power to the TSC or back-up power from the TSC diesel generator. Existing telecommunication systems provided for the emergency response organization (ERO) remain functional to provide the ERO within the TSC and EOF the necessary emergency assessment capabilities, as described in the PVNGS Emergency Plan. The ERFDADS system in each of the three unit control rooms and unit satellite TSCs remain functional and are not affected by the TSC UPS outage. Compensatory measures exist within emergency plan implementing procedures to obtain meteorological tower data locally and from the National Weather Service.
"The ERO has been briefed on the effects of the planned TSC UPS outage.
"The NRC Resident Inspector has been informed.
"PVNGS will inform the NRC after the outage has been completed and the functionality of affected equipment has
been restored."
* * * UPDATE FROM DAVE HECKMAN TO HOWIE CROUCH AT 1632 EST ON 12/12/13 * * *
"The following event description is based on information currently available. If through subsequent reviews of this event, additional information is identified that is pertinent to this event or alters the information being provided at this time, a follow-up notification will be made via the ENS or under the reporting requirements of 10CFR50.73.
"This notification is an update to EN 49616 which provided notification of pre-planned maintenance activities on the Palo Verde Nuclear Generating Station (PVNGS) Technical Support Center (TSC) uninterruptable power supply (UPS) that disabled various Emergency Plan (E-Plan) data systems.
"At approximately 0915 Mountain Standard Time on December 12, 2013, PVNGS restored the affected data systems to service such that the functions of the E-Plan can now be performed without the use of alternate methods.
"The NRC Resident Inspector has been informed. "
Notified R4DO (Werner).
Power Reactor
Event Number: 49617
Facility: CLINTON
Region: 3 State: IL
Unit: [1] [] []
RX Type: [1] GE-6
NRC Notified By: DAN HUNT
HQ OPS Officer: JEFF ROTTON
Region: 3 State: IL
Unit: [1] [] []
RX Type: [1] GE-6
NRC Notified By: DAN HUNT
HQ OPS Officer: JEFF ROTTON
Notification Date: 12/09/2013
Notification Time: 01:15 [ET]
Event Date: 12/08/2013
Event Time: 20:27 [CST]
Last Update Date: 12/09/2013
Notification Time: 01:15 [ET]
Event Date: 12/08/2013
Event Time: 20:27 [CST]
Last Update Date: 12/09/2013
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL 50.72(b)(3)(v)(C) - POT UNCNTRL RAD REL 50.72(b)(3)(v)(D) - ACCIDENT MITIGATION
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL 50.72(b)(3)(v)(C) - POT UNCNTRL RAD REL 50.72(b)(3)(v)(D) - ACCIDENT MITIGATION
Person (Organization):
CHRISTINE LIPA (R3DO)
CHRISTINE LIPA (R3DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | M/R | Y | 97 | Power Operation | 0 | Hot Shutdown |
MANUAL SCRAM DUE TO LOSS OF DIVISION 1 480 VAC POWER CAUSING LOSS OF INSTRUMENT AIR TO CONTAINMENT AND SCRAM AIR HEADER
While operating at rated electrical power, the station experienced a transformer fault which resulted in a loss of Division 1 480 VAC power. This resulted in the operators inserting a Manual Scram due to loss of Instrument Air to Containment and the scram air header. On the scram, all control rods fully inserted and no safety relief valves lifted. Reactor vessel level is being maintained by normal feedwater and decay heat is being removed via steam to the main condenser through the steam bypass valves. The plant is currently in Mode 3 and proceeding to Mode 4 to comply with Technical Specification requirements. The plant is in a normal shutdown electrical lineup with the exception of the loss of Division 1 480 VAC power.
Reporting in accordance with 10CFR50.72(b)(3)(v)(C) due to loss of normal ventilation to secondary containment which resulted in a positive secondary containment pressure for approximately 15 minutes. Secondary Containment required pressure was restored at 2043 CST.
Reporting in accordance with 10CFR50.72(b)(3)(v)(D) due to loss of Division 1 480 VAC power resulting in loss of a single train of Low Pressure Core Spray.
The licensee has notified the NRC Resident Inspector.
While operating at rated electrical power, the station experienced a transformer fault which resulted in a loss of Division 1 480 VAC power. This resulted in the operators inserting a Manual Scram due to loss of Instrument Air to Containment and the scram air header. On the scram, all control rods fully inserted and no safety relief valves lifted. Reactor vessel level is being maintained by normal feedwater and decay heat is being removed via steam to the main condenser through the steam bypass valves. The plant is currently in Mode 3 and proceeding to Mode 4 to comply with Technical Specification requirements. The plant is in a normal shutdown electrical lineup with the exception of the loss of Division 1 480 VAC power.
Reporting in accordance with 10CFR50.72(b)(3)(v)(C) due to loss of normal ventilation to secondary containment which resulted in a positive secondary containment pressure for approximately 15 minutes. Secondary Containment required pressure was restored at 2043 CST.
Reporting in accordance with 10CFR50.72(b)(3)(v)(D) due to loss of Division 1 480 VAC power resulting in loss of a single train of Low Pressure Core Spray.
The licensee has notified the NRC Resident Inspector.