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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
