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Preliminary Notification (PN) Reports for 2008

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December
PNO-III-08-013A 12/22/2008 Exelon Generation Company, LLC/Quad Cities Station 2: Quad Cities Unit 2 Startup After Repairs to the Steam Piping Bellows Failure Inside of the Main Condenser - Update
PNO-III-08-013 12/15/2008 Quad Cities: Unit 2 Shutdown Due to a Steam Piping Bellows Failure Inside of the Main Condenser
PNO-I-08-013A 12/05/2008 Oyster Creek: Shutdown Greater than 72 Hours: Automatic Reactor Scram due to Main Transformer Fault (Update)
PNO-I-08-013 12/01/2008 Oyster Creek: Shutdown Greater than 72 Hours; Automatic Reactor Scram due to Main Transformer Fault

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November
PNO-I-08-012 11/17/2008 AmerGen Energy Company, LLC: Results of Implementationof Oyster Creek License Renewal Commitments Related to the Drywell Primary Containment.

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October
PNO-III-08-012A 10/29/2008 Quad Cities: Notice of Unusual Event Due to Onsite Explosion (Update)
PNO-I-08-011 10/27/2008 PPL Susquehanna, LLC: Alert Declared Due to High Nitrogen Levels in a Unit 2 Safety-Related Pump Room
PNO-III-08-012 10/27/2008 Quad Cities Nuclear Power Plant: Quad Cities Notice of Unusual Even Due to Onsite Explosion

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September
PNO-III-08-009A 09/29/2008 Monticello Nuclear Generating Station Nuclear Management Company (NMC): Unplanned Shutdown Greater Than 72 Hours (Update)
PNO-III-08-011 09/22/2008 D. C. Cook Power Plant, Indiana Michigan Power Company, American Electric Power (AEP): DC Cook Unit 1 Manual Trip Due to Main Turbine Generator Fire and Significant Fire Suppression System Degradation
PNO-III-08-010 09/17/2008 Monticello Nuclear Generating Station, Nuclear Management Company (NMC): Monticello Loss-of-Offsite-Power
PNO-III-08-009 09/15/2008 Monticello Nuclear Generating Station Nuclear Management Company (NMC): Unplanned Shutdown Greater Than 72 Hours
PNO-IV-08-008A 09/11/2008 Entergy Operations, Inc., Waterford-3 and River Bend Station: NRC Response to Hurricane Gustav (Update)
PNO-IV-08-009 09/09/2008 Department of the Air Force, Lackland Air Force Base: Unintended Dose To An Embryo/Fetus
PNO-IV-08-007A 09/08/2008 Pacific Gas and Electric Company, Diablo Canyon Power Plant: Notice of Unusual Event at Diablo Canyon Unit 2 (Update)
PNO-IV-08-008 09/02/2008 Entergy Operations, Inc., Waterford-3 and River Bend Station: NRC Response to Hurricane Gustav

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August
PNO-I-08-010 08/28/2008 PSEG: Hope Creek Generating Station Notification of Unusual Event Due to Indications of Internal Flooding
PNO-II-08-010 08/20/2008 Florida Power and Light Company: Unit 1 Shutdown Due to out of Specification Steam Generator Water Chemistry
PNO-IV-08-007 08/18/2008 Pacific Gas and Electric Company, Diablo Canyon Power Plant: Notice of Unusual Event at Diablo Canyon Unit 2
PNO-II-08-009 08/18/2008 Florida Power and Light Company, Turkey Point: Unit 4 Shutdown to Repair Piping Leak
PNO-III-08-008A 08/11/2008 Entergy Nuclear Operations, Inc., Palisades Nuclear Power Plant: Palisades Forced Shutdown to Replace Leaking Control Rod Drive Seals (Update)
PNO-III-08-008 08/07/2008 Entergy Nuclear Operations, Inc., Palisades Nuclear Power Plant: Palisades Forced Shutdown to Replace Leaking Control Rod Drive Seals
PNO-III-08-007A 08/04/2008 Prairie Island: Unplanned Unit 1 Shutdown Greater than 72 Hours/Special Inspection (Update)
PNO-III-08-007 08/01/2008 Prairie Island: Unplanned Unit 1 Shutdown Greater than 72 Hours/Special Inspection

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July
PNO-IV-08-006 07/29/2008 Southern California Edison Company (San Onofre Nuclear Generating Station): Seismic Event Near San Onfore Nuclear Generating Station and University of California (Irvine) Research Reactor
PNO-I-08-009B 07/22/2008 Entergy Nuclear Operations, Inc., Vermont Yankee Nuclear Power Station, Unit 1: Water Leak in a Cooling Tower at Vermont Yankee (Update)
PNO-I-08-009A 07/16/2008 Entergy Nuclear Operations, Inc., Vermont Yankee Nuclear Power Station, Unit 1: Water Leak in a Cooling Tower at Vermont Yankee (Update)
PNO-I-08-009 07/11/2008 Entergy Nuclear Operations, Inc., Vermont Yankee Nuclear Power Station, Unit 1: Water Leak in a Cooling Tower at Vermont Yankee
PNO-IV-2008-004B 07/11/2008 U.S. Department of Commerce, National Institute of Standards and Technology: Contamination Event (Update)

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June
PNO-II-08-008 06/27/2008 Duke Energy Carolinas, LLC/McGuire Nuclear Station: Unit 1 Shutdown Due to Loss of 1B Reactor Coolant Pump
PNO-IV-08-004A 06/20/2008 U.S. Department of Commerce, National Institute of Standards & Technology: Contamination Event (Update)
PNO-III-08-006A 06/20/2008 Florida Power and Light/Duane Arnold Energy Center: Status of Duane Arnold Notice of Unusual Event (Update)
PNO-III-08-006 06/16/2008 Florida Power and Light/Duane Arnold Energy Center: Status of Duane Arnold Notice of Unusual Event
PNO-III-08-005 06/13/2008 Detroit Edison Company/Fermi 2: Fermi Declaration of Notification of Unusual Event Due to partial Loss of Annunciators in Control Room. NRC Entered monitoring Mode
PNO-IV-08-005 06/12/2008 Kansas State University: Alert Declared Due to Tornado Damage to Kansas State University Reactor Facility
PNO-IV-08-004 06/11/2008 U.S. Department of Commerce, National Institute of Standards & Technology: Contamination Event

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May
PNO-I-08-006A 05/30/2008 Vermont Yankee Nuclear Power Station: Transfer of Spent Fuel from Spent Fuel Storage Pool to Onsite Independent Spent Fuel Storage Installation (ISFSI) (Update)
PNO-I-08-007 05/27/2008 Millstone Nuclear Power Station Unit 2: Unusual Event Declared Due to Loss of Offsite Power at Millstone Unit 2
PNO-II-08-007 05/19/2008 Watts Bar Nuclear Plant: Unit 1 Shutdown Due to Main Generator Stator Cooling Water Leak
PNO-II-08-006 05/16/2008 Westinghouse Electric Corporation: Declaration of Alert Due to Loss of Offsite Water Supply
PNO-I-08-005 05/13/2008 Nine Mile Point Nuclear Power Station, Unit 1: Unusual Event Declared Due to Loss of Offsite Power at Nine Mile Point Unit 1

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April
PNO-II-08-005 04/21/2008 Paducah Gaseous Diffusion Plant: Licensee Response to Earthquake on April 21, 2008
PNO-III-08-004A 04/18/2008 Indiana Michigan Power Company/D.C. Cook Entergy Nuclear Operations, Inc./Palisades: Unusual Events Declared Due to Earthquake (Update)
PNO-III-08-004 04/18/2008 Indiana Michigan Power Company/D.C. Cook Entergy Nuclear Operations, Inc./Palisades: Unusual Events Declared Due to Earthquake
PNO-III-08-003 04/08/2008 FPL Energy Point Beach, LLC: Possible Security Threat
PNO-I-08-004 04/07/2008 Notification of Unusual Event Due to Increase in Unidentified Leakage Following Shutdown for a Refueling Outage

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March
PNO-III-08-002A 03/28/2008 Exelon Generation LLC/Byron Unit 2: Byron Unit 2 Notice of Unusual Event Due to Loss of Offsite Power to Vital Busses (Update)
PNO-IV-08-003A 03/26/2008 Omaha Public Power District, Fort Calhoun Station: Fort Calhoun Station Reactor Trip and Shutdown Expected to Be Greater than 72 Hours (Supplemental)
PNO-III-08-002 03/26/2008 Exelon Generation LLC/Byron Unit 2: Byron Unit 2 Notice of Unusual Event Due to Loss of Offsite Power to Vital Busses
PNO-II-08-003A 03/19/2008 Progress Energy, Crystal River Nuclear Plant Unit 3: Circumferential Indications in Alloy 600 Weld in Decay Heat Drop Line (Update)
PNO-IV-08-003 03/17/2008 Omaha Public Power District, Fort Calhoun Station: Fort Calhoun Station Reactor Trip and Shutdown Expected to Be Greater than 72 Hours
PNO-II-08-004 03/14/2008 Farley Nuclear Plant Unit 1: Alert Due to 1B Emergency Diesel Generator (EDG) Exhaust Header Failure at Farley
PNO-II-08-001A 03/10/2008 Global Nuclear Fuel - Americas L. L. C.: Alert Declared Based on Moderator Alarm in Moderator-Limited Process Vessel (Update)
PNO-II-08-0003 03/05/2008 Progress Energy, Crystal River Nuclear Plant Unit 3: Circumferential Indications in Alloy 600 Weld in Decay Heat Drop Line
PNO-IV-2008-002A 03/06/2008 Sabia, Inc. - Idaho Falls, Idaho: SR-90 Contamination Event (Update)
PNO-IV-2008-002 03/02/2008 Sabia, Inc. - Idaho Falls, Idaho: Contamination of Worker

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February
PNO-II-08-002 02/27/2008 Turkey Point Units 3 & 4: Dual Unit Trip at Turkey Point Due to Grid Disturbance
PNO-I-08-003A 02/15/2008 Limerick Generating Station, Unit 2: Shutdown Exceeding 72 Hours (Update)
PNO-I-08-003 02/11/2008 Limerick Generating Station, Unit 2: Shutdown Exceeding 72 Hours
PNO-III-08-001B 02/05/2008 Point Beach Unit 1: Notice of Unusual Event Due to Loss of Offsite Power to Vital Busses (Update)

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January
PNO-I-08-001A 01/31/2008 Seabrook: Unplanned Shutdown Greater than 72 Hours Resulting from Automatic Reactor Trip Due to Ground Fault on 345kv Line (Update)
PNO-II-08-001 01/31/2008 Global Nuclear Fuel - Americas L. L. C.: Alert Declared Based on Moderator Alarm in Moderator-Limited Process Vessel
PNO-I-08-002 01/30/2008 Ginna Nuclear Power Plant: Loss of Site Communications Due to High Winds
PNO-I-08-001 01/22/2008 Seabrook: Unplanned Shutdown Greater than 72 Hours Resulting from Automatic Reactor Trip Due to Ground Fault on 345kv Line
PNO-III-08-001A 01/18/2008 Point Beach Unit 1: Notice of Unusual Event Due to Loss of Offsite Power to Vital Busses (Update)
PNO-III-08-001 01/16/2008 Point Beach Unit 1: Notice of Unusual Event Due to Loss of Offsite Power to Vital Busses
PNO-IV-08-001A 01/16/2008 Wolf Creek Generating Station: Unplanned Shutdown Greater Than 72 Hours Due To Emergency Core Cooling System Voiding (Event Notification 43895) (Update)
PNO-IV-08-001 01/15/2008 Wolf Creek Generating Station: Unplanned Shutdown Greater Than 72 Hours Due To Emergency Core Cooling System Voiding (Event Notification 43895)

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Page Last Reviewed/Updated Tuesday, March 9, 2021