Event Notification Report for July 18, 2012
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
07/17/2012 - 07/18/2012
Power Reactor
Event Number: 48117
Facility: LIMERICK
Region: 1 State: PA
Unit: [1] [] []
RX Type: [1] GE-4,[2] GE-4
NRC Notified By: BRIAN DEVINE
HQ OPS Officer: JOHN KNOKE
Region: 1 State: PA
Unit: [1] [] []
RX Type: [1] GE-4,[2] GE-4
NRC Notified By: BRIAN DEVINE
HQ OPS Officer: JOHN KNOKE
Notification Date: 07/18/2012
Notification Time: 09:33 [ET]
Event Date: 07/18/2012
Event Time: 08:15 [EDT]
Last Update Date: 07/18/2012
Notification Time: 09:33 [ET]
Event Date: 07/18/2012
Event Time: 08:15 [EDT]
Last Update Date: 07/18/2012
Emergency Class: UNUSUAL EVENT
10 CFR Section:
50.72(a) (1) (i) - EMERGENCY DECLARED 50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL
10 CFR Section:
50.72(a) (1) (i) - EMERGENCY DECLARED 50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL
Person (Organization):
ANTHONY DIMITRIADIS (R1DO)
DAVE LEW (DRA)
JACK DAVIS (NRR)
WILLIAM GOTT (IRD)
BRUCE BOGER (ET)
ANTHONY DIMITRIADIS (R1DO)
DAVE LEW (DRA)
JACK DAVIS (NRR)
WILLIAM GOTT (IRD)
BRUCE BOGER (ET)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | M/R | Y | 100 | Power Operation | 0 | Hot Shutdown |
UNUSUAL EVENT DECLARED DUE TO FLASHOVER IN THE LOAD CENTER TRANSFORMER CABINET
"An electrical transformer fault occurred resulting in a loss of both Recirc Pumps. The reactor was manually scrammed from 100% power as required by Plant Procedure OT-112.
"The electrical transformer was walked down by Operations supervisor. Licensee's assessment was that a flashover occurred, and was confined to the load center transformer cabinet. Based on observed damage, EAL declaration of HU3 was made."
HU3 is identified as an explosion within the Protected Area.
The licensee has notified the NRC Resident Inspector. Licensee also notified state, local and other government agencies.
Notified other agencies (DHS SWO, FEMA, DHS NICC)
* * * UPDATE FROM BRIAN DEVINE TO JOHN KNOKE AT 1022 EDT ON 07/18/12 * * *
"Limerick, Unit 1 is terminating from their Unusual Event (HU3) due to the initiating event and conditions no longer being present. The 124A Fault was isolated by the trip of the designed protection features (feeder breaker trip). A walkdown of the area/equipment was completed with no adverse conditions noted. Normal plant shutdown activities are in progress. The area/equipment is quarantined for investigation."
The licensee will be issuing a press release. Notified other agencies (DHS SWO, FEMA, DHS NICC)
The licensee has notified the NRC Resident Inspector. Notified R1DO (Dimitriadis) and NRR EO (Davis)
"An electrical transformer fault occurred resulting in a loss of both Recirc Pumps. The reactor was manually scrammed from 100% power as required by Plant Procedure OT-112.
"The electrical transformer was walked down by Operations supervisor. Licensee's assessment was that a flashover occurred, and was confined to the load center transformer cabinet. Based on observed damage, EAL declaration of HU3 was made."
HU3 is identified as an explosion within the Protected Area.
The licensee has notified the NRC Resident Inspector. Licensee also notified state, local and other government agencies.
Notified other agencies (DHS SWO, FEMA, DHS NICC)
* * * UPDATE FROM BRIAN DEVINE TO JOHN KNOKE AT 1022 EDT ON 07/18/12 * * *
"Limerick, Unit 1 is terminating from their Unusual Event (HU3) due to the initiating event and conditions no longer being present. The 124A Fault was isolated by the trip of the designed protection features (feeder breaker trip). A walkdown of the area/equipment was completed with no adverse conditions noted. Normal plant shutdown activities are in progress. The area/equipment is quarantined for investigation."
The licensee will be issuing a press release. Notified other agencies (DHS SWO, FEMA, DHS NICC)
The licensee has notified the NRC Resident Inspector. Notified R1DO (Dimitriadis) and NRR EO (Davis)
Agreement State
Event Number: 48130
Rep Org: ILLINOIS EMERGENCY MGMT. AGENCY
Licensee: FLINT HILLS RESOURCES CHEMICAL INTERMEDIATES
Region: 3
City: JOLIET State: IL
County:
License #:
Agreement: Y
Docket: 01337-01
NRC Notified By: DAREN PERRERO
HQ OPS Officer: VINCE KLCO
Licensee: FLINT HILLS RESOURCES CHEMICAL INTERMEDIATES
Region: 3
City: JOLIET State: IL
County:
License #:
Agreement: Y
Docket: 01337-01
NRC Notified By: DAREN PERRERO
HQ OPS Officer: VINCE KLCO
Notification Date: 07/24/2012
Notification Time: 15:50 [ET]
Event Date: 07/18/2012
Event Time: 00:00 [CDT]
Last Update Date: 07/24/2012
Notification Time: 15:50 [ET]
Event Date: 07/18/2012
Event Time: 00:00 [CDT]
Last Update Date: 07/24/2012
Emergency Class: NON EMERGENCY
10 CFR Section:
10 CFR Section:
Person (Organization):
TAMARA BLOOMER (R3DO)
FSME via email
TAMARA BLOOMER (R3DO)
FSME via email
AGREEMENT STATE REPORT - GAUGE SHUTTER FAILURE
The following information was received by email:
"On the evening of July 18, 2012 the licensee's radiation safety officer contacted the [Illinois Emergency Management] Agency's Radiation Duty Officer to advise that a fixed gauge had failed to perform as expected when an attempt was made to close the shutter in advance of work scheduled to be performed on the vessel it was mounted on. The RSO reports that although the spindle of the handle rotated, the shutter did not close. The shutter remained stuck in the 'open' position and would not close. As a result, the planned work was deferred and access to the confined space has been prohibited. The gauge is mounted such that there are no adjacent work stations and unrestricted access is not possible. Radiation monitoring performed by the radiation safety officer showed no abnormal readings.
"The gauge shutter had been successfully tested in March with no abnormalities at that time. The gauge is mounted in such a way that although it is exposed to ambient temperatures, it is not directly exposed to the elements by virtue of an overhead cover. The gauge has not been subjected to any corrosives or solvents or other conditions which exceed the gauge prototype's test conditions. Arrangements have been made to have the manufacturer's representative on-site to conduct an evaluation and effect repairs as necessary at the end of the week."
The fixed gauge is a model SA-1 manufactured by Ronan Engineering (serial number 69094). The gauge contains a Cs-137 sealed source (.082 Ci).
Illinois Incident: IL 12011
The following information was received by email:
"On the evening of July 18, 2012 the licensee's radiation safety officer contacted the [Illinois Emergency Management] Agency's Radiation Duty Officer to advise that a fixed gauge had failed to perform as expected when an attempt was made to close the shutter in advance of work scheduled to be performed on the vessel it was mounted on. The RSO reports that although the spindle of the handle rotated, the shutter did not close. The shutter remained stuck in the 'open' position and would not close. As a result, the planned work was deferred and access to the confined space has been prohibited. The gauge is mounted such that there are no adjacent work stations and unrestricted access is not possible. Radiation monitoring performed by the radiation safety officer showed no abnormal readings.
"The gauge shutter had been successfully tested in March with no abnormalities at that time. The gauge is mounted in such a way that although it is exposed to ambient temperatures, it is not directly exposed to the elements by virtue of an overhead cover. The gauge has not been subjected to any corrosives or solvents or other conditions which exceed the gauge prototype's test conditions. Arrangements have been made to have the manufacturer's representative on-site to conduct an evaluation and effect repairs as necessary at the end of the week."
The fixed gauge is a model SA-1 manufactured by Ronan Engineering (serial number 69094). The gauge contains a Cs-137 sealed source (.082 Ci).
Illinois Incident: IL 12011