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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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Text
April 18, 2008
PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE -- PNO-III-08-004
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 D.C. Cook Indiana Michigan Power Company Bridgman, MI Docket Nos. 50-315, 50-316 License Nos. DPR-58, DPR-74
Palisades Entergy Nuclear Operations, Inc.
Covert, MI Docket No. 50-255 License No. DPR-20 Licensee Emergency Classification x Notification of Unusual Event Alert Site Area Emergency General Emergency _ Not Applicable
SUBJECT:
UNUSUAL EVENTS DECLARED DUE TO EARTHQUAKE
DESCRIPTION:
At approximately 6:02 a.m. EDT on April 18, 2008, Indiana Michigan Power Company declared an Unusual Event, the lowest of four NRC emergency notification classifications, at the D.C. Cook Nuclear Plant. At approximately 6:03 a.m. EDT on April 18, 2008, Entergy Nuclear Operations, Inc. declared an Unusual Event at the Palisades Nuclear Plant. The Unusual Events were declared due to an earthquake, magnitude 5.2 on the Richter Scale (source: U.S. Geological Survey), centered in West Salem, Illinois, approximately 250 miles south of the D.C. Cook plant and approximately 280 miles south of the Palisades plant.
The earthquake was felt at the facilities and instrumentation installed in the plants also alerted the operators of the event. The facilities continued to operate normally with no indications of any adverse effects. D.C. Cook Unit 2 and Palisades continue to operate at full power. D.C. Cook Unit 1 was in a refueling outage at the time. To confirm that the earthquake had no adverse impact on the facilities, and in accordance with their procedures, personnel at D.C. Cook and Palisades performed detailed walkdowns of the facilities. No damage has been identified.
NRC inspectors at the sites responded to the event and are monitoring licensee activities from the control room. NRC inspectors also conducted walkdowns of safety significant portions of the facility to independently verify that the event did not have a negative impact on plant equipment. No damage was identified. The NRC's Region III office has maintained contact with the sites to ensure appropriate actions are being completed.
The Unusual Event at D.C. Cook was terminated at 9:05 a.m. EDT. Palisades remains in an Unusual Event pending completion of ongoing assessments.
The State of Michigan has been informed. The information in this preliminary notification has been reviewed with licensee management.
The D.C. Cook event was reported to the NRC Operations Center at 6:20 a.m. EDT and the Palisades event was reported to the NRC Operations Center at 6:23 a.m. EDT on April 18, 2008.
NRC Region III contacted all other operating reactors, large material licensees, and research reactors within Region III. The earthquake was not strong enough to set off seismic alarms, however, all operating reactors in Region III that felt the earthquake have commenced equipment walkdowns. In addition, NRC inspectors are conducting independent walkdowns at all operating reactors that felt the earthquake. No facilities have identified damage and no other emergency declarations were entered.
NRC Region II contacted the Paducah Gaseous Diffusion Plant in Paducah, Kentucky and the Honeywell facility in Metropolis, Illinois. Seismic activity was felt at both facilities. Plant personnel performed precautionary walkdowns of the facilities and found no evidence of damage. No emergency declarations were made at either facility.
This information is current as of 11:40 a.m. EDT on Friday, April 18, 2008.
CONTACTS:
Alex Garmoe Christine Lipa John Pelchat 630/829-9738 630/829-9619 404/562-4729
