Event Notification Report for December 17, 2020
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
12/16/2020 - 12/17/2020
EVENT NUMBERS55025 55037 55038
Agreement State
Event Number: 55025
Rep Org: TEXAS DEPT OF STATE HEALTH SERVICES
Licensee: VALERO REFINING TEXAS LP
Region: 4
City: Texas City State: TX
County:
License #: L-02578
Agreement: Y
Docket:
NRC Notified By: Art Tucker
HQ OPS Officer: Solomon Sahle
Notification Date: 12/09/2020
Notification Time: 09:21 [ET]
Event Date: 12/08/2020
Event Time: 00:00 [CST]
Last Update Date: 12/09/2020
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
Person (Organization):
RAY KELLAR (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
Event Text
AGREEMENT STATE REPORT - SHUTTER MALFUNCTION
The following information was received from the Texas Department of State Health Services (the Agency) via email:
"On December 8, 2020, the Agency received an e-mail from the licensee stating that during routine testing the shutters on two nuclear gauges were found stuck in the open position. The gauges are Vega model SH-F1 both containing 20 milliCuries (original activity) cesium-137 sources. The licensee reported there is no risk of radiation exposure to members of the general public or workers at the facility due to the failures. The licensee stated they were working on a plan to repair the gauges and would provide that information once the plan is completed. Additional information will be provided as it is received in accordance with SA-300."
Texas Incident No: I-9815
Power Reactor
Event Number: 55037
Facility: Palo Verde
Region: 4 State: AZ
Unit: [1] [2] [3]
RX Type: [1] CE,[2] CE,[3] CE
NRC Notified By: Lorraine Weaver
HQ OPS Officer: Howie Crouch
Notification Date: 12/16/2020
Notification Time: 12:09 [ET]
Event Date: 12/15/2020
Event Time: 15:00 [MST]
Last Update Date: 12/16/2020
Emergency Class: Non Emergency
10 CFR Section:
26.719 - Fitness For Duty
Person (Organization):
YOUNG, CALE (R4)
FFD GROUP, (EMAIL)
Power Reactor Unit Info
| Unit |
SCRAM Code |
RX Crit |
Initial PWR |
Initial RX Mode |
Current PWR |
Current RX Mode |
| 1 |
N |
N |
100 |
Power Operation |
100 |
Power Operation |
| 2 |
N |
N |
100 |
Power Operation |
100 |
Power Operation |
| 3 |
N |
N |
100 |
Power Operation |
100 |
Power Operation |
Event Text
FITNESS FOR DUTY
A plant employee, after being selected for a random fitness-for-duty test, admitted to use of a controlled substance. The employee's unescorted access to the facility has been placed on hold pending an investigation.
The NRC Resident Inspector has been notified.
Power Reactor
Event Number: 55038
Facility: Harris
Region: 2 State: NC
Unit: [1] [] []
RX Type: [1] W-3-LP
NRC Notified By: Chris Hayes
HQ OPS Officer: Howie Crouch
Notification Date: 12/16/2020
Notification Time: 12:19 [ET]
Event Date: 12/16/2020
Event Time: 08:51 [EST]
Last Update Date: 12/16/2020
Emergency Class: Non Emergency
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS Actuation - Critical
Person (Organization):
MILLER, MARK (R2)
Power Reactor Unit Info
| Unit |
SCRAM Code |
RX Crit |
Initial PWR |
Initial RX Mode |
Current PWR |
Current RX Mode |
| 1 |
A/R |
Y |
80 |
Power Operation |
0 |
Hot Standby |
Event Text
AUTOMATIC REACTOR TRIP DUE TO GENERATOR LOCKOUT
"On December 16, 2020 at 0851 EST, with Harris Nuclear Plant Unit 1 in Mode 1 at 80 percent power, an automatic reactor trip occurred due to lockout of the main generator. The trip was not complex, with all systems responding normally post-trip. The initial assessment of this event indicates that there was a ground fault on the 'B' train of the non-safety electrical distribution system that caused the main generator lockout. Steam generator levels are being maintained by normal feedwater through the feedwater regulator bypass valves. Decay heat is being removed by using the condenser steam dump flow path.
"Due to the unplanned Reactor Protection System actuation while critical, this event is being reported as a four hour, non-emergency notification per 10 CFR 50.72(b)(2)(iv)(B).
"This condition does not affect the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified."
All rods inserted into the core during the trip. The electrical grid is stable and all safe shutdown equipment is available for service. No reliefs lifted during the transient.