Event Notification Report for August 12, 2016
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
08/11/2016 - 08/12/2016
EVENT NUMBERS
52179
Power Reactor
Event Number: 52179
Facility: WATERFORD
Region: 4 State: LA
Unit: [3] [] []
RX Type: [3] CE
NRC Notified By: MARIA ZAMBER
HQ OPS Officer: VINCE KLCO
Region: 4 State: LA
Unit: [3] [] []
RX Type: [3] CE
NRC Notified By: MARIA ZAMBER
HQ OPS Officer: VINCE KLCO
Notification Date: 08/15/2016
Notification Time: 14:10 [ET]
Event Date: 08/12/2016
Event Time: 17:04 [CDT]
Last Update Date: 08/15/2016
Notification Time: 14:10 [ET]
Event Date: 08/12/2016
Event Time: 17:04 [CDT]
Last Update Date: 08/15/2016
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(v)(D) - ACCIDENT MITIGATION
10 CFR Section:
50.72(b)(3)(v)(D) - ACCIDENT MITIGATION
Person (Organization):
DAVID PROULX (R4DO)
DAVID PROULX (R4DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 3 | N | Y | 100 | Power Operation | 100 | Power Operation |
LOSS OF BOTH LOOPS OF ESSENTIAL SERVICES CHILLED WATER
"This is a non-emergency notification from Waterford 3. On August 12, 2016, at 1704 CDT, the shift operating crew entered Technical Specification (TS) 3.0.3 due to both trains of Essential Services Chilled Water being inoperable. Essential Services Chilled Water Loop A had previously been declared inoperable for maintenance on August 11, 2016. On August 12, 2016, at 1704, the shift operating crew noted that Loop B Essential Services Chilled Water outlet temperature exceeded the allowed TS limit of 42 degrees Fahrenheit. Essential Chiller AB was subsequently aligned to Loop B and TS 3.0.3 was exited on August 12, 2016 at 1802 when outlet temperature was verified less than or equal to 42 degrees Fahrenheit.
"On August 15, 2016, subsequent review of this event determined that this event was reportable under 10 CFR 50.72(b)(3)(v)(D), 'event or condition that could have prevented fulfillment of a safety function of structures or systems that are needed to (D) mitigate the consequences of an accident' due to both Essential Services Chilled Water Loops being inoperable.
"The NRC Resident Inspector has been notified."
"This is a non-emergency notification from Waterford 3. On August 12, 2016, at 1704 CDT, the shift operating crew entered Technical Specification (TS) 3.0.3 due to both trains of Essential Services Chilled Water being inoperable. Essential Services Chilled Water Loop A had previously been declared inoperable for maintenance on August 11, 2016. On August 12, 2016, at 1704, the shift operating crew noted that Loop B Essential Services Chilled Water outlet temperature exceeded the allowed TS limit of 42 degrees Fahrenheit. Essential Chiller AB was subsequently aligned to Loop B and TS 3.0.3 was exited on August 12, 2016 at 1802 when outlet temperature was verified less than or equal to 42 degrees Fahrenheit.
"On August 15, 2016, subsequent review of this event determined that this event was reportable under 10 CFR 50.72(b)(3)(v)(D), 'event or condition that could have prevented fulfillment of a safety function of structures or systems that are needed to (D) mitigate the consequences of an accident' due to both Essential Services Chilled Water Loops being inoperable.
"The NRC Resident Inspector has been notified."