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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

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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."

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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 Monday, June 22, 2015
Monday, June 22, 2015