Event Notification Report for January 07, 2013
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
01/06/2013 - 01/07/2013
EVENT NUMBERS
48656
Power Reactor
Event Number: 48656
Facility: COLUMBIA GENERATING STATION
Region: 4 State: WA
Unit: [2] [] []
RX Type: [2] GE-5
NRC Notified By: RYAN OAKES
HQ OPS Officer: BILL HUFFMAN
Region: 4 State: WA
Unit: [2] [] []
RX Type: [2] GE-5
NRC Notified By: RYAN OAKES
HQ OPS Officer: BILL HUFFMAN
Notification Date: 01/07/2013
Notification Time: 19:29 [ET]
Event Date: 01/07/2013
Event Time: 14:27 [PST]
Last Update Date: 01/07/2013
Notification Time: 19:29 [ET]
Event Date: 01/07/2013
Event Time: 14:27 [PST]
Last Update Date: 01/07/2013
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(v)(C) - POT UNCNTRL RAD REL 50.72(b)(3)(v)(D) - ACCIDENT MITIGATION
10 CFR Section:
50.72(b)(3)(v)(C) - POT UNCNTRL RAD REL 50.72(b)(3)(v)(D) - ACCIDENT MITIGATION
Person (Organization):
VINCENT GADDY (R4DO)
VINCENT GADDY (R4DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 2 | N | Y | 100 | Power Operation | 100 | Power Operation |
SECONDARY CONTAINMENT MOMENTARILY INOPERABLE
"Technical Specification 3.6.4.1 (Secondary Containment) requires that the secondary containment be operable. Surveillance requirement 3.6.4.1.3 requires verifying each secondary containment access inner door or each secondary containment access outer door in each access opening is closed.
"Maintenance personnel were moving scaffolding through Reactor Building outer security door (R-304) when an equipment operator opened inner door (R-305) to exit the Reactor Building. This resulted in both the Reactor Building inner and outer access doors being simultaneously open for a short duration. Normally, the doors are interlocked in which the inner door would not be able to be opened prior to the outer security door being closed.
"The equipment operator immediately closed the door and notified the Main Control Room. The outer security door (R-304) has been key-locked closed, until corrective actions can be determined.
"Columbia Generating Station is investigating why the interlock feature failed.
"There were no radiological releases associated with this event.
"No safety system actuations or isolations occurred."
The licensee has notified the NRC Resident Inspector.
Note: See similar event reported by licensee on 12/30/12, EN #48639, involving containment door interlock failure on doors R-204 and R-205.
"Technical Specification 3.6.4.1 (Secondary Containment) requires that the secondary containment be operable. Surveillance requirement 3.6.4.1.3 requires verifying each secondary containment access inner door or each secondary containment access outer door in each access opening is closed.
"Maintenance personnel were moving scaffolding through Reactor Building outer security door (R-304) when an equipment operator opened inner door (R-305) to exit the Reactor Building. This resulted in both the Reactor Building inner and outer access doors being simultaneously open for a short duration. Normally, the doors are interlocked in which the inner door would not be able to be opened prior to the outer security door being closed.
"The equipment operator immediately closed the door and notified the Main Control Room. The outer security door (R-304) has been key-locked closed, until corrective actions can be determined.
"Columbia Generating Station is investigating why the interlock feature failed.
"There were no radiological releases associated with this event.
"No safety system actuations or isolations occurred."
The licensee has notified the NRC Resident Inspector.
Note: See similar event reported by licensee on 12/30/12, EN #48639, involving containment door interlock failure on doors R-204 and R-205.