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Category:NRC Preliminary Notification of Event/Occurrence
MONTHYEARML21190A2422021-07-0909 July 2021 PNO-lll-21-001A: Donald C. Cook Nuclear Plant, Unit 2, Update: Unplanned Shutdown Greater than 7 Days Due to Main Steam Leakage ML21181A4162021-06-30030 June 2021 PNO-lll-21-001 Donald C. Cook Nuclear Plant, Unit 2: Unplanned Shutdown Greater than 7 Days Due to Main Steam Leakage PNO-III-20-001A, Update: Unplanned Shutdown Greater than 72 Hours Due to Reactor Coolant System Leakage Exceeding Technical Specification Limits2020-05-11011 May 2020 PNO-III-20-001A Update: Unplanned Shutdown Greater than 72 Hours Due to Reactor Coolant System Leakage Exceeding Technical Specification Limits PNO-III-20-001, Unplanned Shutdown Greater than 72 Hours Due to Reactor Coolant System Leakage Exceeding Technical Specification Limits2020-05-0404 May 2020 PNO-III-20-001: Unplanned Shutdown Greater than 72 Hours Due to Reactor Coolant System Leakage Exceeding Technical Specification Limits PNO-III-19-002, Palisades, Through-Wall Leak Identified on a Reactor Vessel Head Nozzle2018-11-14014 November 2018 PNO-III-19-002: Palisades, Through-Wall Leak Identified on a Reactor Vessel Head Nozzle PNO-III-19-001, Maintenance Outage to Repair Control Rod Drive and Failed Transformer2018-10-18018 October 2018 PNO-III-19-001: Maintenance Outage to Repair Control Rod Drive and Failed Transformer ML17256A7152017-09-13013 September 2017 PNO-III-2017-002: Donald C. Cook Notice of Unusual Event During Plant Shutdown Due to Increased Reactor Coolant System Leakage PNO-III-16-003, D.C. Cook Unit 2 Manual Trip Resulting in a Shutdown for Greater than 72 Hours2016-07-12012 July 2016 PNO-III-16-003: D.C. Cook Unit 2 Manual Trip Resulting in a Shutdown for Greater than 72 Hours PNO-III-15-007, A - D.C. Cook: Update to Technical Specification Required Shutdown of D.C. Cook Unit 1 Due to an Inoperable Emergency Diesel Generator2015-07-30030 July 2015 PNO-III-15-007A - D.C. Cook: Update to Technical Specification Required Shutdown of D.C. Cook Unit 1 Due to an Inoperable Emergency Diesel Generator ML15153A6192015-06-0202 June 2015 PNO-III-15-007 - D.C. Cook: Technical Specification Required Shutdown of D.C. Cook Unit 1 Due to an Inoperable Emergency Diesel Generator ML14316A5922014-11-12012 November 2014 PNO-lll-14-010A - Update: D.C. Cook Dual Unit Manual Trip Resulting in a Shutdown for Greater than 72 Hours on Unit 2 PNO-III-14-010, D.C. Cook Dual Unit Manual Trip Resulting in a Shutdown for Greater than 72 Hours on Unit 22014-11-0404 November 2014 PNO-III-14-010: D.C. Cook Dual Unit Manual Trip Resulting in a Shutdown for Greater than 72 Hours on Unit 2 PNO-III-14-002, A: Update, Palisades Control Rod Drive Mechanism Housing Flaws2014-03-14014 March 2014 PNO-III-14-002A: Update, Palisades Control Rod Drive Mechanism Housing Flaws ML14030A1902014-01-30030 January 2014 PNO-III-14-002: Palisades Control Rod Drive Mechanism Housing Flaws PNO-III-13-004, B, Update - Palisades Shutdown Due to Safety Injection Refueling Water Tank (SIRWT) Leakage2013-06-17017 June 2013 PNO-III-13-004B, Update - Palisades Shutdown Due to Safety Injection Refueling Water Tank (SIRWT) Leakage ML13129A4382013-05-0909 May 2013 PNO-III-13-004A - Update: Palisades Shutdown Due to Safety Injection Refueling Water Storage Tank (SIRWT) Leakage ML13126A2702013-05-0606 May 2013 PNO-III-13-004 - Palisades Shutdown Due to Safety Injections Refueling Water Storage Tank Leakage PNO-III-13-002, A - Update - Palisades Shutdown Due to Leakage from the Component Cooling Water (CCW) System2013-02-22022 February 2013 PNO-III-13-002A - Update - Palisades Shutdown Due to Leakage from the Component Cooling Water (CCW) System ML13046A4042013-02-15015 February 2013 PNO-III-13-002, Palisades Shutdown Due to Leakage from the Component Cooling Water (CCW) System ML12314A2712012-11-0909 November 2012 PNO-lll-12-015A (Update) Palisades Shutdown Due to Leakage from the Main Steam System ML12310A5052012-11-0505 November 2012 PNO-lll-12-015, Palisades Shutdown Due to Leakage from the Main Steam System PNO-III-12-012, Palisades Leakage from the Service Water System2012-09-25025 September 2012 PNO-III-12-012: Palisades Leakage from the Service Water System PNO-III-12-007, A, Update, Palisades Shutdown Due to Increase in Unidentified Reactor Coolant System Leakage2012-08-30030 August 2012 PNO-III-12-007A, Update, Palisades Shutdown Due to Increase in Unidentified Reactor Coolant System Leakage PNO-III-12-004, A: Update - Palisades Shutdown Due to Safety Injection Refueling Water Storage Tank Leakage2012-07-11011 July 2012 PNO-III-12-004A: Update - Palisades Shutdown Due to Safety Injection Refueling Water Storage Tank Leakage ML12166A2612012-06-14014 June 2012 PNO-III-12-004 - Palisades Shutdown Due to Safety Injection Refueling Water Storage Tank Leakage PNO-III-11-011, A - Palisades Reactor Trip (Update)2011-10-0303 October 2011 PNO-III-11-011-A - Palisades Reactor Trip (Update) ML11269A2302011-09-26026 September 2011 PNO-III-11-011 Palisades Nuclear Plant Reactor Trip PNO-III-11-010, Palisades - Unplanned Shutdown Greater than 72 Hours and Notification of Unusual Event2011-09-19019 September 2011 PNO-III-11-010 - Palisades - Unplanned Shutdown Greater than 72 Hours and Notification of Unusual Event ML1123601032011-08-23023 August 2011 PNO-II-11-005: North Anna, Emergency Declarations Due to Seismic Event PNO-III-11-003, Palisades Shutdown Due to Loss of Main Generator Electrical Load2011-01-24024 January 2011 PNO-III-11-003, Palisades Shutdown Due to Loss of Main Generator Electrical Load PNO-III-11-001, ; Palisades, Unusual Event and 72-Hour Limiting Condition for Operation Due to 4160 V Ground Fault2011-01-11011 January 2011 PNO-III-11-001; Palisades, Unusual Event and 72-Hour Limiting Condition for Operation Due to 4160 V Ground Fault PNO-III-10-010, A: Update - Palisades Forced Shutdown for Greater than 72 Hours to Replace Leaking Control Rod Drive Seal2010-07-0606 July 2010 PNO-III-10-010A: Update - Palisades Forced Shutdown for Greater than 72 Hours to Replace Leaking Control Rod Drive Seal ML1017605222010-06-25025 June 2010 PNO-III-10-010 - Palisades - Forced Shutdown for Greater than 72 Hours to Replace Leaking Control Rod Drive Seal PNO-I-10-003, Unusual Event Declarations Due to Seismic Activity (Vermont Yankee and D.C. Cook)2010-06-23023 June 2010 PNO-I-10-003: Unusual Event Declarations Due to Seismic Activity (Vermont Yankee and D.C. Cook) PNO-III-09-015, D.C. Cook Unit 1, Return to 100 Percent Power2009-12-23023 December 2009 PNO-III-09-015: D.C. Cook Unit 1, Return to 100 Percent Power PNO-III-09-014, D.C. Cook Unit 1, Restart2009-12-18018 December 2009 PNO-III-09-014: D.C. Cook Unit 1, Restart PNO-III-09-013, D. C. Cook Unit 1 Mode Change Following 14 Months Forced Outage2009-11-23023 November 2009 PNO-III-09-013 - D. C. Cook Unit 1 Mode Change Following 14 Months Forced Outage PNO-III-09-006, A: D.C. Cook Unit 2, Forced Shutdown for Greater than 72 Hours to Repair Reactor Coolant Pump Seal (Update)2009-08-10010 August 2009 PNO-III-09-006A: D.C. Cook Unit 2, Forced Shutdown for Greater than 72 Hours to Repair Reactor Coolant Pump Seal (Update) ML0920901352009-07-28028 July 2009 PNO-III-09-006: D.C. Cook, Unit 2 Forced Shutdown for Greater than 72 Hours to Repair Reactor Coolant Pump Seal PNO-III-09-001, A - Palisades Forced Shutdown for Greater than 72 Hours to Replace Leaking Control Rob Drive Seal (Update)2009-02-23023 February 2009 PNO-III-09-001A - Palisades Forced Shutdown for Greater than 72 Hours to Replace Leaking Control Rob Drive Seal (Update) ML0904905272009-02-18018 February 2009 PNO-III-09-001, Palisades Forced Shutdown for Greater than 72 Hours to Replace Leaking Control Rod Drive Seals PNO-III-08-011, D. C. Cook - Unit 1 Manual Trip Due to Main Turbine Generator Fire and Significant Fire Suppression System Degradation2008-09-22022 September 2008 PNO-III-08-011: D. C. Cook - Unit 1 Manual Trip Due to Main Turbine Generator Fire and Significant Fire Suppression System Degradation PNO-III-08-008, A - Palisades - Forced Shutdown to Replace Leaking Control Rod Drive (CRD) Seal Packages (Update)2008-08-11011 August 2008 PNO-III-08-008A - Palisades - Forced Shutdown to Replace Leaking Control Rod Drive (CRD) Seal Packages (Update) ML0822003472008-08-0707 August 2008 PNO-III-08-008 - Palisades Forced Shutdown to Replace Leaking Control Rod Drive Seals PNO-III-08-004, A, Cook and Palisades, Update - Unusual Events Declared Due to Earthquake2008-04-18018 April 2008 PNO-III-08-004A, Cook and Palisades, Update - Unusual Events Declared Due to Earthquake ML0810903102008-04-18018 April 2008 PNO-III-08-004: Cook & Palisades, Unusual Events Declared Due to Earthquake PNO-III-07-006, A: Palisades, Shutdown Due to Low Steam Generator Level (Update)2007-05-14014 May 2007 PNO-III-07-006A: Palisades, Shutdown Due to Low Steam Generator Level (Update) ML0712905812007-05-0909 May 2007 PNO-III-07-006: Palisades Shutdown Due to Low Steam Generator Level PNO-III-07-003, A - Palisades: Shutdown to Replace Heat Damaged Cables (Update)2007-03-0505 March 2007 PNO-III-07-003A - Palisades: Shutdown to Replace Heat Damaged Cables (Update) ML0705805222007-02-27027 February 2007 PNO-III-07-003: Palisades - Palisades Shutdown to Replace Heat-Damaged Cables 2021-07-09
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April 18, 2008 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE -- PNO-III-08-004A 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.
Facilities Licensee Emergency Classification D.C. Cook x Notification of Unusual Event Indiana Michigan Power Company Alert Bridgman, MI Site Area Emergency Docket Nos. 50-315, 50-316 General Emergency License Nos. DPR-58, DPR-74 _ Not Applicable Palisades Entergy Nuclear Operations, Inc.
Covert, MI Docket No. 50-255 License No. DPR-20
SUBJECT:
UPDATE - UNUSUAL EVENTS DECLARED DUE TO EARTHQUAKE DESCRIPTION:
At approximately 5:36 a.m. EDT on April 18, 2008, a magnitude 5.2 earthquake occurred that was centered near West Salem, Illinois. An Unusual Event was declared at two nuclear power stations, D.C. Cook and Palisades, as a result of on-site seismic activity. NRC personnel responded to the site and to the Region III office to closely monitor plant conditions. At approximately 11:14 a.m. EDT a 4.6 magnitude aftershock occurred that was felt at both facilities. Licensee personnel and NRC inspectors conducted independent equipment walkdowns after the initial earthquake and the aftershock. No issues were identified.
The Unusual Event at D.C. Cook was initially terminated at 9:05 a.m. EDT following equipment walkdowns. However, the licensee re-entered the Unusual Event at 11:45 a.m. EDT, following the aftershock. The second Unusual Event was terminated at 4:00 p.m. EDT, following completion of additional equipment walkdowns and evaluations.
The Unusual Event at Palisades was terminated at 2:31 p.m. EDT following completion of equipment walkdowns and evaluation.
The State of Michigan has been informed. The information in the preliminary notification has been reviewed with licensee management.
Several other Region III and Region IV nuclear power reactors experienced seismic activity from the initial earthquake and the aftershock that remained below the threshold for emergency declaration. Equipment walkdowns were conducted by licensee personnel at all operating power reactors that felt seismic activity. In addition, NRC inspectors conducted independent equipment walkdowns. No issues were identified at any facility.
Additionally, the NRC contacted three research and test reactors, two fuel cycle facilities, and 23 facilities licensed to possess self-shielded irradiators and medical devices containing large quantities of sealed sources. These facilities are located in areas of Illinois, Indiana, Kentucky, Michigan, and Missouri that may have experienced seismic activity. The NRC confirmed that no equipment issues were identified at any of the facilities.
This information is current as of 4:00 p.m. EDT on Friday, April 18, 2008.
CONTACTS:
Alex Garmoe Christine Lipa John Pelchat Thomas Farnholtz 630/829-9738 630/829-9619 404/562-4729 817/860-8243