Event Notification Report for July 09, 2017
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
07/08/2017 - 07/09/2017
EVENT NUMBERS
52843
Power Reactor
Event Number: 52843
Facility: GRAND GULF
Region: 4 State: MS
Unit: [1] [] []
RX Type: [1] GE-6
NRC Notified By: DAVID BURRUS
HQ OPS Officer: BETHANY CECERE
Region: 4 State: MS
Unit: [1] [] []
RX Type: [1] GE-6
NRC Notified By: DAVID BURRUS
HQ OPS Officer: BETHANY CECERE
Notification Date: 07/10/2017
Notification Time: 05:42 [ET]
Event Date: 07/09/2017
Event Time: 21:58 [CDT]
Last Update Date: 07/10/2017
Notification Time: 05:42 [ET]
Event Date: 07/09/2017
Event Time: 21:58 [CDT]
Last Update Date: 07/10/2017
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):
THOMAS FARNHOLTZ (R4DO)
THOMAS FARNHOLTZ (R4DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 100 | Power Operation | 100 | Power Operation |
LOSS OF SAFETY FUNCTION - CONTROL ROOM ENVELOPE INOPERABLE
"At 2158 [CDT] a door to the Control Room Envelope was left unsecure. GGNS [Grand Gulf Nuclear Station] identified that a loss of Safety Function occurred due to a breach in the Control Room Envelope resulting in inoperability of both divisions of Standby Fresh Air and therefore could have prevented fulfillment of its safety function. The Control Room Envelope was inoperable for one minute. This event is being reported under 10CFR 50.72(b)(3)(v)(D), as any event or condition that, at the time of discovery, could have prevented the fulfillment of the safety function of structures or systems that are needed to mitigate the consequences of an accident."
The licensee notified the NRC Resident Inspector.
"At 2158 [CDT] a door to the Control Room Envelope was left unsecure. GGNS [Grand Gulf Nuclear Station] identified that a loss of Safety Function occurred due to a breach in the Control Room Envelope resulting in inoperability of both divisions of Standby Fresh Air and therefore could have prevented fulfillment of its safety function. The Control Room Envelope was inoperable for one minute. This event is being reported under 10CFR 50.72(b)(3)(v)(D), as any event or condition that, at the time of discovery, could have prevented the fulfillment of the safety function of structures or systems that are needed to mitigate the consequences of an accident."
The licensee notified the NRC Resident Inspector.