Event Notification Report for February 12, 2023
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
02/11/2023 - 02/12/2023
EVENT NUMBERS
56350
56350
!!!!! THIS EVENT HAS BEEN RETRACTED !!!!!
!!!!! THIS EVENT HAS BEEN RETRACTED !!!!!
Power Reactor
Event Number: 56350
Facility: Beaver Valley
Region: 1 State: PA
Unit: [1] [2] []
RX Type: [1] W-3-LP,[2] W-3-LP
NRC Notified By: Patrick Harris
HQ OPS Officer: Ian Howard
Region: 1 State: PA
Unit: [1] [2] []
RX Type: [1] W-3-LP,[2] W-3-LP
NRC Notified By: Patrick Harris
HQ OPS Officer: Ian Howard
Notification Date: 02/12/2023
Notification Time: 14:41 [ET]
Event Date: 02/12/2023
Event Time: 08:00 [EST]
Last Update Date: 05/04/2023
Notification Time: 14:41 [ET]
Event Date: 02/12/2023
Event Time: 08:00 [EST]
Last Update Date: 05/04/2023
Emergency Class: Non Emergency
10 CFR Section:
50.72(b)(3)(ii)(B) - Unanalyzed Condition 50.72(b)(3)(v)(D) - Accident Mitigation
10 CFR Section:
50.72(b)(3)(ii)(B) - Unanalyzed Condition 50.72(b)(3)(v)(D) - Accident Mitigation
Person (Organization):
Cahill, Christopher (R1DO)
Cahill, Christopher (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 |
EN Revision Imported Date: 5/4/2023
EN Revision Text: CONTROL ROOM EMERGENCY VENTILATION SYSTEM INOPERABLE
The following information was provided by the licensee via phone call and email:
"At 0800 on February 12, 2023, it was discovered that both trains of control room emergency ventilation system were simultaneously inoperable due to a safety injection relief valve discharging to a Unit 1 sump. This leakage in conjunction with design basis loss of coolant accident may result in radiological dose exceeding limits to the exclusion area boundary and to the control room, which is common to both Unit 1 and Unit 2. Therefore, this condition is being reported as an eight-hour, nonemergency notification per 10 CFR 50.72(b)(3)(ii)(B) and 10 CFR 50.72(b)(3)(v)(D) as an 'Unanalyzed Condition and a Condition that Could Have Prevented Fulfillment of a Safety Function.'
"There was no impact on the health and safety of the public or plant personnel.
"The NRC Resident Inspector has been notified."
* * * RETRACTION FROM ROBERT TAYLOR TO DONALD NORWOOD AT 0530 EDT ON 3/17/2023 * * *
"Retraction of EN56350, Control Room Emergency Ventilation System Inoperable:
"Based on subsequent evaluation, it was determined that the control room emergency ventilation system remained operable due to the maximum measured leak rate being within the bounds of the analysis. The maximum measured leak rate of 32,594 cc/hr from the safety injection system did not challenge the calculated maximum engineered safety features leak rate of 45,600 cc/hr and remained within the current dose analysis limits. As such, this was not an unanalyzed condition and did not prevent the fulfillment of a safety function to mitigate the consequences of an accident.
"The NRC Resident Inspector has been notified."
Notified R1DO (Bickett).
EN Revision Text: CONTROL ROOM EMERGENCY VENTILATION SYSTEM INOPERABLE
The following information was provided by the licensee via phone call and email:
"At 0800 on February 12, 2023, it was discovered that both trains of control room emergency ventilation system were simultaneously inoperable due to a safety injection relief valve discharging to a Unit 1 sump. This leakage in conjunction with design basis loss of coolant accident may result in radiological dose exceeding limits to the exclusion area boundary and to the control room, which is common to both Unit 1 and Unit 2. Therefore, this condition is being reported as an eight-hour, nonemergency notification per 10 CFR 50.72(b)(3)(ii)(B) and 10 CFR 50.72(b)(3)(v)(D) as an 'Unanalyzed Condition and a Condition that Could Have Prevented Fulfillment of a Safety Function.'
"There was no impact on the health and safety of the public or plant personnel.
"The NRC Resident Inspector has been notified."
* * * RETRACTION FROM ROBERT TAYLOR TO DONALD NORWOOD AT 0530 EDT ON 3/17/2023 * * *
"Retraction of EN56350, Control Room Emergency Ventilation System Inoperable:
"Based on subsequent evaluation, it was determined that the control room emergency ventilation system remained operable due to the maximum measured leak rate being within the bounds of the analysis. The maximum measured leak rate of 32,594 cc/hr from the safety injection system did not challenge the calculated maximum engineered safety features leak rate of 45,600 cc/hr and remained within the current dose analysis limits. As such, this was not an unanalyzed condition and did not prevent the fulfillment of a safety function to mitigate the consequences of an accident.
"The NRC Resident Inspector has been notified."
Notified R1DO (Bickett).