Alert

Due to a lapse in appropriations, the NRC has ceased normal operations. However, excepted and exempted activities necessary to maintain critical health and safety functions—as well as essential progress on designated critical activities, including those specified in Executive Order 14300—will continue, consistent with the OMB-Approved NRC Lapse Plan.

Event Notification Report for June 22, 2015

U.S. Nuclear Regulatory Commission
Operations Center

Event Reports For
06/19/2015 - 06/22/2015

** EVENT NUMBERS **

51165

51168

Power Reactor	Event Number: 51165
Facility: QUAD CITIES Region: 3 State: IL Unit: [1] [2] [ ] RX Type: [1] GE-3,[2] GE-3 NRC Notified By: JAMES COX HQ OPS Officer: JEFF HERRERA	Notification Date: 06/19/2015 Notification Time: 10:03 [ET] Event Date: 06/19/2015 Event Time: 01:53 [CDT] Last Update Date: 06/19/2015
Emergency Class: NON EMERGENCY 10 CFR Section: 50.72(b)(3)(v)(C) - POT UNCNTRL RAD REL	Person (Organization): PATTY PELKE (R3DO)

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

Event Text

SECONDARY CONTAINMENT INTERLOCK DOORS OPEN SIMULTANEOUSLY

"On June 19, 2015, at 0153 CDT, two Secondary Containment interlock doors (1/2 EDG [Emergency Diesel Generator] room door and the Unit 1 reactor building door) were open simultaneously. The doors were immediately closed and secondary containment pressure remained negative.

"This condition represents a failure to meet surveillance requirement 3.6.4.1.2 given two doors in a single access opening were open simultaneously. As a result entry into Technical Specification 3.6.4.1, Condition A, was made momentarily due to secondary containment being inoperable.

"This event is reportable under 10 CFR 50.72(b)(3)(v)(C) as an event or condition that could have prevented the fulfillment of a safety function.

"The NRC Resident Inspector has been notified.

"The door has been posted to notify to restrict access.

"The State of Illinois Emergency Management has been notified."

Power Reactor	Event Number: 51168
Facility: LIMERICK Region: 1 State: PA Unit: [ ] [2] [ ] RX Type: [1] GE-4,[2] GE-4 NRC Notified By: DAN WILLIAMSON HQ OPS Officer: STEVE SANDIN	Notification Date: 06/21/2015 Notification Time: 20:25 [ET] Event Date: 06/21/2015 Event Time: 16:25 [EDT] Last Update Date: 06/21/2015
Emergency Class: NON EMERGENCY 10 CFR Section: 50.72(b)(3)(iv)(A) - VALID SPECIF SYS ACTUATION	Person (Organization): BRICE BICKETT (R1DO)

Unit	SCRAM Code	RX CRIT	Initial PWR	Initial RX Mode	Current PWR	Current RX Mode
2	N	Y	100	Power Operation	100	Power Operation

Event Text

MANUAL SECONDARY CONTAINMENT ISOLATION

"In response to a trip of Unit 2 reactor enclosure HVAC [Heating, Ventilation and Air Conditioning], subsequent loss of reactor enclosure delta-p and rising reactor enclosure room temperatures, a Unit 2 manual secondary containment isolation was initiated per station procedures. This manual isolation also resulted in an isolation signal to containment atmosphere control (CAC) system valves and primary containment instrument gas (PCIG) system valves. System responses were as expected.

"Unit 2 secondary containment delta-p and room temperatures were restored via the standby gas treatment system (SGTS), and Unit 2 secondary containment integrity remains intact and operable.

"Investigation of the trip of Unit 2 reactor enclosure HVAC is ongoing.

"This is being reported under 50.72(b)(3)(iv)(A) for containment isolation signal affecting containment isolation valves in more than one system."

The licensee informed the NRC Resident Inspector.

Page Last Reviewed/Updated Wednesday, March 24, 2021