Event Notification Report for June 24, 2017
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
06/23/2017 - 06/24/2017
EVENT NUMBERS
52826
Power Reactor
Event Number: 52826
Facility: SUSQUEHANNA
Region: 1 State: PA
Unit: [1] [2] []
RX Type: [1] GE-4,[2] GE-4
NRC Notified By: RONALD FRY
HQ OPS Officer: VINCE KLCO
Region: 1 State: PA
Unit: [1] [2] []
RX Type: [1] GE-4,[2] GE-4
NRC Notified By: RONALD FRY
HQ OPS Officer: VINCE KLCO
Notification Date: 06/24/2017
Notification Time: 15:42 [ET]
Event Date: 06/24/2017
Event Time: 10:28 [EDT]
Last Update Date: 06/24/2017
Notification Time: 15:42 [ET]
Event Date: 06/24/2017
Event Time: 10:28 [EDT]
Last Update Date: 06/24/2017
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(v)(C) - POT UNCNTRL RAD REL
10 CFR Section:
50.72(b)(3)(v)(C) - POT UNCNTRL RAD REL
Person (Organization):
FRANK ARNER (R1DO)
FRANK ARNER (R1DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 100 | Power Operation | 100 | Power Operation |
| 2 | N | Y | 100 | Power Operation | 100 | Power Operation |
LOSS OF SECONDARY CONTAINMENT
"On June 24, 2017 at 1028 [EDT], a loss of secondary containment occurred due to trip of 2V217A Zone III Filtered Exhaust Fan causing a reduction in D/P [differential pressure] to less than the required 0.25 WC [water column].
"2V217B Zone III Filtered Exhaust Fan started on low flow in AUTO as designed and secondary containment D/P was restored to greater than 0.25 WC by 1029 hours.
"This event is being reported under 10 CFR 50.72(b)(3)(v)(c) and per the guidance of NUREG 1022, Rev. 3, section 3.2.7 as a loss of a safety function. There is no redundant Susquehanna secondary containment system."
The licensee notified the NRC Resident Inspector.
"On June 24, 2017 at 1028 [EDT], a loss of secondary containment occurred due to trip of 2V217A Zone III Filtered Exhaust Fan causing a reduction in D/P [differential pressure] to less than the required 0.25 WC [water column].
"2V217B Zone III Filtered Exhaust Fan started on low flow in AUTO as designed and secondary containment D/P was restored to greater than 0.25 WC by 1029 hours.
"This event is being reported under 10 CFR 50.72(b)(3)(v)(c) and per the guidance of NUREG 1022, Rev. 3, section 3.2.7 as a loss of a safety function. There is no redundant Susquehanna secondary containment system."
The licensee notified the NRC Resident Inspector.