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Home NRC Library Document Collections Events, Reports Associated with Preliminary Notification Reports

Preliminary Notification (PN) Reports for 2010

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December
PNO-II-10-005 12/23/2010 Honeywell International, Inc.: Hydrofluoric Acid Release at the Honeywell Uranium Conversion Facility
PNO-III-10-018A 12/21/2010 NextEra Energy Point Beach: Point Beach Unit 2 Reactor Unplanned Shutdown Due to Control Rod Drive Problems (Update)
PNO-III-10-018 12/17/2010 NextEra Energy Point Beach: Point Beach Unit 2 Reactor Unplanned Shutdown Due to Control Rod Drive Problems
PNO-IV-10-006 12/03/2010 Pacific Steel and Recycling: Loss of Control of Licensed Material
PNO-III-10-017 12/03/2010 Fermi Power Plant, Unit 2: Condensate Overflows Into Turbine Building

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November
PNO-III-10-016 11/30/2010 Detroit Edison Company: Injured Person Transported Off-Site
PNO-IV-10-005B 11/29/2010 South Texas Project Unit 2 Reactor Trip and Notification of Unusual Event (Update)
PNO-I-10-006A 11/26/2010 Entergy Nuclear Operations, Inc.: Notification of Alert Declared Due to Explosion as a Result of 21 Main Transformer Failure at Indian Point Unit 2 (Update)
PNO-IV-10-005A 11/12/2010 South Texas Project Unit 2 Reactor Trip and Notification of Unusual Event (Update)
PNO-I-10-006 11/08/2010 Entergy Nuclear Operations, Inc.: Notification of Alert Declared Due to Explosion as a Result of 21 Main Transformer Failure at Indian Point Unit 2
PNO-IV-10-005 11/03/2010 South Texas Project Unit 2 Reactor Trip and Notification of Unusual Event

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October
PNO-IV-10-004A 10/14/2010 Wolf Creek Nuclear Operating Corp.: Wolf Creek Technical Specification Required Reactor Shutdown (Update)
PNO-IV-10-004 10/05/2010 Wolf Creek Nuclear Operating Corp.: Wolf Creek Technical Specification Required Reactor Shutdown

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September
PNO-IV-10-003A 09/07/2010 Entergy Operations, Inc.: Arkansas Nuclear One, Unit 2 Technical Specification Required Reactor Shutdown (Update)
PNO-IV-10-003 09/07/2010 Entergy Operations, Inc.: Arkansas Nuclear One, Unit 2 Technical Specification Required Reactor Shutdown

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August
PNO-III-10-015 08/31/2010 Exelon Generation Co.: Initiation of Reactive Inspection in Response to a Failure of the Mechanism that Cools Water Surrounding a Canister Containing Spent Fuel
PNO-III-10-014A 08/23/2010 Exelon Generation Co.: Braidwood Units 1 & 2 - Shutdown of Braidwood Reactors Unit 1 & 2 (Update)
PNO-III-10-014 08/17/2010 Exelon Generation Co.: Braidwood Units 1 & 2 - Shutdown of Braidwood Reactors Unit 1 & 2
PNO-II-10-004A 08/11/2010 Duke Energy Carolinas LLC.: Notification of Unusual Event Due to Loss of Annunciators (Update)
PNO-II-10-004 08/11/2010 Duke Energy Carolinas LLC.: Notification of Unusual Event Due to Loss of Annunciators
PNO-I-10-005 08/10/2010 PPL, Susquehanna, LLC: Susquehanna Station - Alert Declared Due to High Refrigerant Levels in the Unit 1 Reactor Building
PNO-III-10-013 08/09/2010 Former Breckenridge Disposal Site: Potentially Hazardous Material Spill at the Former Breckenridge Disposal Site
PNO-I-10-004A 08/04/2010 PPL, Susquehanna, LLC: Susquehanna Unit 1 Manual Scram and Shutdown Greater Than 72 Hours Due to an Internal Flooding Event (Update)

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July
PNO-111-10-012A 07/22/2010 Exelon Generation Co.: LaSalle Units 1 and 2 Leakage of Tritium from Onsite Storage Tank (Update)
PNO-I-10-004 07/20/2010 PPL, Susquehanna, LLC: Susquehanna Unit 1 Manual Scram and Shutdown Greater Than 72 Hours Due to an Internal Flooding Event
PNO-II-10-002B 07/08/2010 Carolina Power and Light Company: H.B. Robinson Steam Electric Plant - Fires Affecting Safety Related Equipment; Special Inspection Upgraded to an Augmented Inspection (update)
PNO-III-10-010A 07/06/2010 Entergy Nuclear Operations, Inc.: Update - Palisades Forced Shutdown for Greater than 72 Hours to Replace Leaking Control Rod Drive Seal
PNO-III-10-012 07/02/2010 Exelon Generation Co.: LaSalle Leakage of Tritium from Onsite Storage Tank

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June
PNO-III-10-011 06/29/2010 First Energy Nuclear Operating Company: Davis-Besse Start-Up Following Repairs of Control Rod Drive Mechanism Nozzle Flaw Indications
PNO-II-10-003 06/29/2010 Honeywell International, Inc.: Bargaining Unit Lock-Out at Honeywell- Metropolis Works
PNO-III-10-010 06/24/2010 Entergy Nuclear Operations, Inc.: Palisades – Forced Shutdown for Greater than 72 Hours to Replace Leaking Control Rod Drive Seal
PNO-I-10-003 06/23/2010 Entergy Nuclear Operations, Inc./American Electric Power: Unusual Event Declarations Due to Seismic Activity at Vermont Yankee and D.C. Cook Stations
PNO-IV-10-002 06/23/2010 Pacific Gas and Electric Company: Alert at Diablo Canyon Power Plant Unit 1
PNO-III-10-009A 06/17/2010 Detroit Edison Company: Fermi 2 Alert and Unplanned Shutdown for Greater Than 72 Hours (Update)
PNO-III-10-009 06/07/2010 Detroit Edison Company: Fermi 2 Alert and Unplanned Shutdown for Greater Than 72 Hours

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May
PNO-I-10-002 05/28/2010 Entergy Nuclear Operations, Inc.: Loss of Normal Communications / Storm Impact Offsite at Vermont Yankee
PNO-III-10-008 05/20/2010 First Energy Nuclear Operating Company: Public Availability of Two NRC Employees Differing Professional Opinions Concerning Past Issues at Davis Besse
PNO-III-10-007 05/19/2010 Exelon Generation Co./Quad Cities: Unusual Event Declared at Quad Cities Due to Freon Leak in the Access Building
PNO-III-10-006A 05/19/2010 FirstEnergy Nuclear Operating Company/Perry Nuclear Power Station: Manual Reactor Scram Due to Loss of Control Rod Drive Charging Water Header Pumps (Update)
PNO-III-10-006 05/14/2010 FirstEnergy Nuclear Operating Company/Perry Nuclear Power Station: Manual Reactor Scram Due to Loss of Control Rod Drive Charging Water Header Pumps

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April
PNO-II-10-002A 04/15/2010 Carolina Power and Light Company: H.B. Robinson Steam Electric Plant - Fires Affecting Safety Related Equipment (Update)
PNO-III-10-003A 04/12/2010 First Energy Nuclear Operating Company: Davis-Besse Control Rod Drive Mechanism Nozzle Indications (Update)

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March
PNO-III-10-005A 03/31/2010 First Energy Nuclear Operating Company: Turbine-Driven Feedwater Pump Fire Caused by Leak in Lube Oil System (Update)
PNO-III-10-004A 03/31/2010 Detroit Edison Company: Fermi 2 Scram and Unplanned Shutdown for Greater Than 72 Hours (Update)
PNO-III-10-004 03/30/2010 Detroit Edison Company: Fermi 2 Scram and Unplanned Shutdown for Greater Than 72 Hours
PNO-III-10-005 03/30/2010 First Energy Nuclear Operating Company: Turbine-Driven Feedwater Pump Fire Caused by Leak in Lube Oil System
PNO-II-10-002 03/29/2010 Carolina Power and Light Company: H.B. Robinson Steam Electric Plant - Fires Affecting Safety Related Equipment
PNO-III-10-003 03/16/2010 First Energy Nuclear Operating Company: Davis-Besse Control Rod Drive Mechanism Nozzle Indications
PNO-I-10-001A 03/01/2010 Constellation Energy Nuclear Group, Inc.: Update - Calvert Cliffs Dual-Unit Trip Due to Partial Loss of Offsite Power

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February
PNO-I-10-001 02/19/2010 Constellation Energy Nuclear Group, Inc.: Calvert Cliffs Dual-Unit Trip Due to Partial Loss of Offsite Power
PNO-II-10-001 02/19/2010 Catawba Nuclear Station, Unit 1: RCS Pressure Boundary Leakage identified on RTD Weld

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January
PNO-III-10-002 01/21/2010 Prairie Island Units 1 and 2, Northern States Power-Minnesota: Fire in a Nonsafety-Related Diesel Generator
PNO-IV-10-001A 01/19/2010 Pacific Gas and Electric Company: Earthquake Near Humboldt Bay Power Plant (Update)
PNO-IV-10-001 01/11/2010 Pacific Gas and Electric Company: Earthquake Near Humboldt Bay Power Plant
PNO-III-10-001 01/11/2010 Exelon Generation Co., LLC: Braidwood Station Declaration of Unusual Event Due to Fire within the Protected Area

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Page Last Reviewed/Updated Tuesday, March 9, 2021