Event Notification Report for October 23, 2015
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
10/22/2015 - 10/23/2015
EVENT NUMBERS
51492
Power Reactor
Event Number: 51492
Facility: WATERFORD
Region: 4 State: LA
Unit: [3] [] []
RX Type: [3] CE
NRC Notified By: SCOTT MEIKLEJOHN
HQ OPS Officer: DANIEL MILLS
Region: 4 State: LA
Unit: [3] [] []
RX Type: [3] CE
NRC Notified By: SCOTT MEIKLEJOHN
HQ OPS Officer: DANIEL MILLS
Notification Date: 10/23/2015
Notification Time: 12:04 [ET]
Event Date: 10/23/2015
Event Time: 00:00 [CDT]
Last Update Date: 10/23/2015
Notification Time: 12:04 [ET]
Event Date: 10/23/2015
Event Time: 00:00 [CDT]
Last Update Date: 10/23/2015
Emergency Class: NON EMERGENCY
10 CFR Section:
21.21(d)(3)(i) - DEFECTS AND NONCOMPLIANCE
10 CFR Section:
21.21(d)(3)(i) - DEFECTS AND NONCOMPLIANCE
Person (Organization):
GREG WERNER (R4DO)
PART 21/50.55 REACT (EMAI)
GREG WERNER (R4DO)
PART 21/50.55 REACT (EMAI)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 3 | N | Y | 100 | Power Operation | 100 | Power Operation |
PART 21 - WESTINGHOUSE TYPE KIR-60 CURRENT TRANSFORMER
The following is excerpted from LER 2015-007 submitted by the licensee (see related EN #51348):
"On October 9, 2015, Waterford 3 received information from the external evaluation concerning the Generator Differential Current Transformer. The evaluation concluded that a manufacturing defect internal to the current transformer was the cause of the failure. On October 22, 2015, engineering evaluation determined the manufacturing defect could create a substantial safety hazard, as defined in 10 CFR 21, and provided the site vice president information of the defect the same day. Additional information identified in the report is as follows:
"Constructor - Westinghouse Type KIR-60 current transformer, style 7524A01G16, serial number 28218571; Defect and safety hazard - There were voids found in the insulation, and the thickness of the insulation material around the fault area appeared reduced when compared to the other areas of the current transformer. There is only one transformer of this type remaining installed in the plant. Scheduled replacement is no later than November 15, 2015."
The following is excerpted from LER 2015-007 submitted by the licensee (see related EN #51348):
"On October 9, 2015, Waterford 3 received information from the external evaluation concerning the Generator Differential Current Transformer. The evaluation concluded that a manufacturing defect internal to the current transformer was the cause of the failure. On October 22, 2015, engineering evaluation determined the manufacturing defect could create a substantial safety hazard, as defined in 10 CFR 21, and provided the site vice president information of the defect the same day. Additional information identified in the report is as follows:
"Constructor - Westinghouse Type KIR-60 current transformer, style 7524A01G16, serial number 28218571; Defect and safety hazard - There were voids found in the insulation, and the thickness of the insulation material around the fault area appeared reduced when compared to the other areas of the current transformer. There is only one transformer of this type remaining installed in the plant. Scheduled replacement is no later than November 15, 2015."