| U.S. Nuclear Regulatory Commission
Operations Center Event Reports For
10/06/2014 - 10/07/2014 ** EVENT NUMBERS ** |
 | !!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!! | | Power Reactor | Event Number: 50492 | Facility: PRAIRIE ISLAND
Region: 3 State: MN
Unit: [1] [ ] [ ]
RX Type: [1] W-2-LP,[2] W-2-LP
NRC Notified By: STEVE INGALLS
HQ OPS Officer: DANIEL MILLS | Notification Date: 09/25/2014
Notification Time: 00:04 [ET]
Event Date: 09/24/2014
Event Time: 15:33 [CDT]
Last Update Date: 10/06/2014 | Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(v)(D) - ACCIDENT MITIGATION
| Person (Organization):
NICK VALOS (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 | Event Text UNIT 1 TRAIN B RVLIS AND ICCM INOPERABLE DUE TO DATA ERRORS
"At 1533 CDT on September 24, during a Past Operability review for the Unit 1 Train B Inadequate Core Cooling Monitor (ICCM), it was discovered that due to data errors, the as left VDC [voltage DC] value for the Remote Display Power Supply was outside of acceptance criteria during the last performance of SP 1213B 'Inadequate Core Cooling Monitor Calibration,' completed on 8/25/2014. The Reactor Vessel Level Instrumentation System (RVLIS) and the Core Exit Thermocouples (CETs) are subsystems of the ICCM System and were determined to be inoperable during this timeframe. Therefore Tech Spec 3.3.3 Condition A for Train B RVLIS and Tech Spec 3.3.3 Condition B for CETs were not met. Also during this time, Unit 1 Train A ICCM was out of service from 1110 [CDT] on 9/8/2014 to 1530 [CDT] on 9/12/2014 for calibration. Thus, both trains of Core Exit Thermocouples and RVLIS were inoperable during this 4 day, 4 hour and 20 minute time period.
"ICCM System indication is used for Safety Injection Termination and Reinitiation criteria in the Emergency Operating Procedures (EOPs). During the time when both trains of ICCM were inoperable, B Train remained in service and was thought to be operable. This provided the potential for operators to perform an untimely SI Termination or Reinitiation during an accident based on inaccurate information. The Emergency Response Computer System was available to provide accurate backup information to the operators and for timely Emergency Action Limit classification
"This is reportable under 10 CFR 50.72 (b)(3)(v)(D), Event or Condition that Could Have Prevented Fulfillment of a Safety Function to Mitigate the Consequences of an Accident.
"Based on new information currently being received from Westinghouse, the ICCM Remote Display Power Supply only functions to communicate data to the display and has no effect on the data values. Thus the ICCM System may have been functioning properly. An update to this information will be provided once it is available
"The protection of the health and safety of the public was not affected by this issue.
"The Unit 1 Train B ICCM System was returned to operable status at 2300 [CDT] on 9/24/2014.
"The license has notified the NRC Senior Resident Inspector."
* * * RETRACTION AT 1408 EDT ON 10/6/2014 FROM NATHAN BIBUS TO DONG PARK * * *
"Based on further analysis and input from Westinghouse, the remote display 12V power supply is operable as long as data is still updating on the display. It was determined that the tolerance acceptance criteria within our procedure was conservative. For this application, the power supply can function at much less than 12V. The acceptance criteria within surveillance procedures were incorrect and procedure changes have been submitted to correct the tolerance. Therefore, there was no loss of safety function.
"The licensee has notified the NRC Resident Inspector."
Notified R3DO (Orlikowski). |
| Power Reactor | Event Number: 50510 | Facility: WOLF CREEK
Region: 4 State: KS
Unit: [1] [ ] [ ]
RX Type: [1] W-4-LP
NRC Notified By: MIKE NORRIS
HQ OPS Officer: MARK ABRAMOVITZ | Notification Date: 10/06/2014
Notification Time: 15:00 [ET]
Event Date: 10/06/2014
Event Time: 13:36 [CDT]
Last Update Date: 10/06/2014 | Emergency Class: ALERT
10 CFR Section:
50.72(a) (1) (i) - EMERGENCY DECLARED
| Person (Organization):
DON ALLEN (R4DO)
KRISS KENNEDY (R4DR)
BILL DEAN (NRR)
MARC DAPAS (R4RA)
JEFFERY GRANT (IRD)
SAMSON LEE (NRR)
|
| Unit | SCRAM Code | RX CRIT | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode | | 1 | N | Y | 100 | Power Operation | 100 | Power Operation | Event Text ALERT DECLARED - FIRE IN A DIESEL GENERATOR POTENTIAL TRANSFORMER
At 1336 CDT, Wolf Creek declared an Alert due to a fire. The fire in the "B" Emergency Diesel Generator potential transformer was extinguished using a portable CO2 fire extinguisher. Plant personnel were exposed to the smoke and were evaluated with no injuries noted. The plant continued to operate at 100% power throughout the event.
The licensee notified the NRC Resident Inspector, State of Kansas Division of Emergency Management, and the Coffey County Sheriff
Notified DHS SWO, DOE Ops Center, FEMA Ops Center, HHS Ops Center, NICC Watch Officer, USDA OPS Center, EPA EOC, FDA EOC, and Nuclear SSA via email.
* * * UPDATE AT 1648 EDT ON 10/6/2014 FROM AARON LUCAS TO MARK ABRAMOVITZ * * *
The Alert was terminated at 1542 CDT because the fire had been terminated within fifteen minutes and a walkdown of the area was clear.
The licensee notified the NRC Resident Inspector.
Notified the R4DO (Allen), IRD (Grant), NRR (Lee), DHS SWO, DOE Ops Center, FEMA Ops Center, HHS Ops Center, NICC Watch Officer, USDA OPS Center, EPA EOC, FDA EOC, and Nuclear SSA via email.. |
| Power Reactor | Event Number: 50511 | Facility: PRAIRIE ISLAND
Region: 3 State: MN
Unit: [1] [2] [ ]
RX Type: [1] W-2-LP,[2] W-2-LP
NRC Notified By: NATHAN BIBUS
HQ OPS Officer: DONG HWA PARK | Notification Date: 10/06/2014
Notification Time: 15:35 [ET]
Event Date: 10/06/2014
Event Time: 10:59 [CDT]
Last Update Date: 10/06/2014 | Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(xi) - OFFSITE NOTIFICATION
| Person (Organization):
ROBERT ORLIKOWSKI (R3DO)
|
| Unit | SCRAM Code | RX CRIT | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode | | 1 | N | Y | 84 | Power Operation | 84 | Power Operation | | 2 | N | Y | 99 | Power Operation | 99 | Power Operation | Event Text OFFSITE NOTIFICATION DUE TO FISH FOUND DEAD AFTER ZEBRA MUSSEL TREATMENT
"At 1059 CDT on October 6, 2014, the State of Minnesota and Environmental Services were notified that approximately 100 fish were found dead against the trash racks of the plant screen house. The licensee had completed zebra mussel treatment several days prior to this event and the fish deaths are attributed to this treatment.
"This is reportable under 10 CFR 50.72 (b)(2)(xi), News Release or Notification of Other Government Agency.
"The protection of the health and safety of the public was not affected by this issue.
"The licensee has notified the NRC Senior Resident Inspector." | |