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Category:NRC Preliminary Notification of Event/Occurrence
MONTHYEARPNO-III-10-007, Unusual Event Declared at Quad Cities Due to Freon Leak in the Access Building2010-05-19019 May 2010
PNO-III-10-007, Unusual Event Declared at Quad Cities Due to Freon Leak in the Access Building
PNO-III-08-013, A: Quad Cities Unit 2 Startup After Repairs to the Steam Piping Bellows Failure Inside of the Main Condenser - Update2008-12-22022 December 2008
PNO-III-08-013A: Quad Cities Unit 2 Startup After Repairs to the Steam Piping Bellows Failure Inside of the Main Condenser - Update
ML0835005792008-12-15015 December 2008
PNO-III-08-013, Quad Cities, Unit 2 Shutdown Due to a Steam Piping Bellows Failure Inside of the Main Condenser
PNO-III-08-012, A - Quad Cities Notice of Unusual Event Due to Onsite Explosion - Update2008-10-29029 October 2008
PNO-III-08-012A - Quad Cities Notice of Unusual Event Due to Onsite Explosion - Update
ML0830100982008-10-27027 October 2008
PNO-III-08-012 - Quad Cities Notice of Unusual Event Due to Onsite Explosion
ML0728902622007-10-16016 October 2007
PNO-III-08-011:Exelon Nuclear Generating Co, Tritium Leakage
PNO-III-06-010, Exelon Generation Co - Cracking Identified in Unit 2 Steam Dryer2006-04-0707 April 2006
PNO-III-06-010, Exelon Generation Co - Cracking Identified in Unit 2 Steam Dryer
PNO-III-06-001, A Quad Cities Degraded Actuators for Electromagnetic Relief Valves (Update)2006-01-19019 January 2006
PNO-III-06-001A Quad Cities Degraded Actuators for Electromagnetic Relief Valves (Update)
ML0601707552006-01-17017 January 2006
PNO-III-06-001 Quad Cities: Degraded Actuators for Electromagnetic Relief Valves
PNO-III-03-026, A: Quad Cities, Cracks Discovered in Unit 2 Steam Dryer - Update2003-06-20020 June 2003
PNO-III-03-026A: Quad Cities, Cracks Discovered in Unit 2 Steam Dryer - Update
PNO-III-03-020, A: Quad Cities, Alert Declared Due to Relief Valve Failing to Close (Update)2003-04-17017 April 2003
PNO-III-03-020A: Quad Cities, Alert Declared Due to Relief Valve Failing to Close (Update)
PNO-III-02-032, Shutdown to Determine and Correct the Cause of Fluctuations in Main Steam Line Parameters (Flow, Pressure, Carryover)2002-07-15015 July 2002
PNO-III-02-032 - Shutdown to Determine and Correct the Cause of Fluctuations in Main Steam Line Parameters (Flow, Pressure, Carryover)
PNO-III-02-001, Shut Down Due to Jet Pump Inoperability2002-01-10010 January 2002
PNO-III-02-001 - Shut Down Due to Jet Pump Inoperability
2010-05-19
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PRELIMINARY NOTIFICATION - REGION III May 19, 2010 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE -- PNO-III-10-007
This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interest significance. The information is as initially received without verification or evaluation, and is basically all that is known by the Region III staff on this date.
Facility Quad Cities Exelon Generation Co.
Cordova, IL Docket Nos. 50-254; 50-265;72-053 License Nos. DPR-29; DPR-30 Licensee Emergency Classification x Notification of Unusual Event Alert Site Area Emergency General Emergency Not Applicable
SUBJECT:
UNUSUAL EVENT DECLARED AT QUAD CITIES DUE TO FREON LEAK IN THE ACCESS BUILDING
DESCRIPTION:
An Unusual Event was declared at the Quad Cities Nuclear Plant on May 19, 2010, at
13:30 p.m. due to a Freon leak in the plant's Access Facility.
The leak was coming from a valve associated with a refrigeration unit on the roof of the building and has been isolated.
All personnel were evacuated from the area. The problem was confined to the Access Facility, which is not connected to any other buildings.
This issue had no impact on plant operation. Both Quad Cities units remained at full power.
The plant's radiation protection personnel took air samples inside the building to make sure Freon readings were down to acceptable levels and to allow acce ss through the A ccess Facility.
NRC resident inspectors monitored the event from the control room and were in communication with NRC Region III and Headquarters staff.
The State of Illinois has been informed.
The information presented herein has been discussed with the licensee and is current as of 4:00 p.m. (CDT) on May 19, 2010.
ADAMS Accession Number ML101390615.
CONTACT: Mark Ring Brian Cushman 630-829-9703 309-654-2227
