United States Nuclear Regulatory Commission - Protecting People and the Environment

Event Notification Report for August 17, 2012

U.S. Nuclear Regulatory Commission
Operations Center

Event Reports For
08/16/2012 - 08/17/2012

** EVENT NUMBERS **


48197 48198

To top of page
Power Reactor Event Number: 48197
Facility: FERMI
Region: 3 State: MI
Unit: [2] [ ] [ ]
RX Type: [2] GE-4
NRC Notified By: JEFF GROSS
HQ OPS Officer: JOHN SHOEMAKER
Notification Date: 08/16/2012
Notification Time: 21:02 [ET]
Event Date: 08/16/2012
Event Time: 14:58 [EDT]
Last Update Date: 08/17/2012
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(xiii) - LOSS COMM/ASMT/RESPONSE
Person (Organization):
JOHN GIESSNER (R3DO)

Unit SCRAM Code RX CRIT Initial PWR Initial RX Mode Current PWR Current RX Mode
2 N Y 68 Power Operation 68 Power Operation

Event Text

INTEGRATED PLANT COMPUTER FAILURE

"At approximately 1458 EDT on 8/16/12, a portion of the Fermi 2 Integrated Plant Computer System (IPCS) failed. This resulted in a loss of approximately 60 percent of data on the Safety Parameters Display System (SPDS).

"While IPCS and SPDS are not fully functional, the Emergency Plan can still be implemented if a plant emergency does occur, as assessment capabilities are available under alternate means.

"Repairs are in progress. A follow up message will be made when IPCS and SPDS are restored to fully functional status.

"This notification is being made pursuant to the requirements 10 CFR 50.72(b)(3)(xiii), any event that results in a major loss of emergency assessment capability."

The licensee has notified the NRC Resident Inspector.

* * * UPDATE FROM GROFF TO KLCO ON 8/17/12 AT 0429 EDT* * *

"At approximately 1458 EDT on 8/16/12, a portion of the Fermi 2 Integrated Plant Computer System (IPCS) failed. This resulted in a loss of approximately 60 percent of data on the Safety Parameters Display System (SPDS).

"At 2340 [EDT], plant personnel were able to restore full functionality of IPCS and SPDS, restoring full Emergency assessment capabilities to all onsite emergency response facilities."

The licensee notified the NRC Resident Inspector.

Notified the R3DO (Giessner).

To top of page
Power Reactor Event Number: 48198
Facility: SEQUOYAH
Region: 2 State: TN
Unit: [ ] [2] [ ]
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: TRACY SUDOKO
HQ OPS Officer: MARK ABRAMOVITZ
Notification Date: 08/16/2012
Notification Time: 22:09 [ET]
Event Date: 08/16/2012
Event Time: 19:26 [EDT]
Last Update Date: 08/16/2012
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL
50.72(b)(3)(iv)(A) - VALID SPECIF SYS ACTUATION
Person (Organization):
EUGENE GUTHRIE (R2DO)

Unit SCRAM Code RX CRIT Initial PWR Initial RX Mode Current PWR Current RX Mode
2 A/R Y 100 Power Operation 0 Hot Standby

Event Text

REACTOR TRIP FROM A REACTOR COOLANT PUMP TRIP

"At 1926 EDT on 8/16/2012, Unit 2 reactor automatically tripped on single loop loss of flow, following #4 RCP trip. Cause of RCP trip is under investigation.

"Following the reactor trip, all safety related equipment operated as designed. Auxiliary feedwater actuated as expected on loss of the operating main feedwater pumps.

"Unit 2 is currently being maintained in Mode 3 at NOP/NOT [normal operating pressure/normal operating temperature], with auxiliary feedwater supplying the steam generator.

"Method of decay heat removal is via steam dumps to condenser. Current RCS conditions: Temp = 547 degrees F and stable, Pressure = 2235 psig and stable. No indication of any primary/secondary leakage. All rods are inserted. Electrical alignment is normal, supplied from offsite power. No impact to Unit 1: Unit 1 is operating at 100% power / Mode 1."

The licensee notified the NRC Resident Inspector.

Page Last Reviewed/Updated Friday, August 17, 2012
Friday, August 17, 2012