United States Nuclear Regulatory Commission - Protecting People and the Environment

Preliminary Notification (PN) Reports for 2006

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December 2006

PNO-IV-06-016A
12/14/2006 Pacific Gas & Electric Co. (Diablo Canyon Power Plant): Unusual Event at Diablo Canyon Power Plant (Update)
PNO-IV-06-016
12/12/2006 Pacific Gas & Electric Co. (Diablo Canyon Power Plant): Unusual Event at Diablo Canyon Power Plant

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November 2006

PNO-I-06-015 11/21/2006 McLeod Regional Medical Center: Exposure to Fetus from Thyroid Ablation Therapy
PNO-I-06-014A 11/20/2006 Calvert Cliffs, Unit 2: Shutdown Greater than 72 hours due to Reactor/Turbine Trip from the Unexpected Closure of Main Turbine Governor and Intercept Valves (Update)
PNO-I-06-014 11/17/2006 Calvert Cliffs, Unit 2: Shutdown Greater than 72 hours due to Reactor/Turbine Trip from the Unexpected Closure of Main Turbine Governor and Intercept Valves
PNO-I-06-013 11/15/2006 Princeton University: Leaking Strontium-90 Plated Source Identified at University
PNO-III-06-022 11/14/2006 Dominion Energy/Kewaunee: Kewaunee Reactor Shutdown and Startup
PNO-IV-06-015 11/13/2006 Nebraska Public Power District/Cooper Nuclear Station:Small Fire and Notification of Unusual Event at Cooper Nuclear Station
PNO-I-06-012 11/09/2006 AmerGen Energy Company, LLC/Oyster Creek Nuclear Generating Station: Evaluation of Oyster Creek Containment Design Function
PNO-IV-06-014 11/07/2006 Pacific EcoSoulutions (PECOS): Americium-241 Inhalation Exposures
PNO-II-06-004A 11/07/2006 AREVA NP, Inc./AREVA -Richland: Update on Workers Exposed to Hydrogen Fluoride (HF) Release
PNO-II-06-005A 11/06/2006 Brunswick Steam Electric Plant, Unit 2: Unusual Event Declared Due to Loss of Offsite Power to Unit 2 4kv Emergency Buses (Update)
PNO-II-06-005 11/02/2006 Brunswick Steam Electric Plant, Unit 2: Unusual Event Declared Due to Loss of Offsite Power to Unit 2, 4kV Emergency Buses

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October 2006

PNO-IV-06-013A 10/31/2006 Entergy Operations, Inc., Arkansas Nuclear One, Unit 2: Update - Termination of Alert at Arkansas Nuclear One, Unit 2
PNO-IV-06-013 10/30/2006 Entergy Operations, Inc., Arkansas Nuclear One, Unit 2: Alert at Arkansas Nuclear One, Unit 2
PNO-II-06-004 10/26/2006 AREVA NP, Inc./AREVA - Richland: Workers Exposed To Hydrogen Fluoride (HF) Release
PNO-I-06-011 10/10/2006 Exelon/Peach Bottom Station, Unit 2: Loss of Containment Integrity Due to Leak in a Test Return Line
PNO-II-06-003 10/09/2006 Surry Power Station: Partial Loss of Offsite Power to Surry Units 1 & 2 Safety System Emergency Busses and Unit 2 Manual Reactor Trip
PNO-IV-06-012 10/05/2006 Goolsby Testing: Radiographer's Radiation Dose in Excess of Regulatory Limits

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September 2006

PNO-IV-06-011 09/11/2006 FMC Idaho LLC: Nuclear Gauge Found in Shipment of Scrap Metal
PNO-III-06-020 09/08/2006 Braidwood 1 and 2: NRC’s Review of Exelon’s Plans for Resuming Radioactive Discharges Through the Braidwood Blowdown Line
PNO-I-06-010A 09/04/2006 FPL Energy Seabrook, LLC/Seabrook Station: Shutdown Greater than 72 Hours - Both Emergency Diesel Generators Inoperable Due to Problems in the Voltage Regulation Circuitry
PNO-I-06-010 09/01/2006 FPL Energy Seabrook, LLC/Seabrook Station: Shutdown Greater than 72 Hours - Both Emergency Diesel Generators Inoperable Due to Problems in the Voltage Regulation Circuitry

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August 2006

PNO-IV-06-010 08/15/2006 Southern California Edison/San Onofre Nuclear Generating Station, Unit 1: Tritium Detected in Water Samples Taken on the Site
PNO-III-06-019 08/14/2006 Dominion Generation Co./Kewaunee Nuclear Power Plant: Tritium Detected in Groundwater Beneath Plant Buildings
PNO-III-06-017A 08/03/2006 American Electric Power/D. C. Cook: D. C. Cook Unit 1 Shuts Down Due to High Containment Air Temperature (Update)
PNO-III-06-018 08/02/2006 Detroit Edison Co./Fermi: Fermi 2 Reactor Shutdown and Unusual Event
PNO-III-06-017 08/01/2006 American Electric Power/D. C. Cook: D. C. Cook Unit 1 Shuts Down Due to High Containment Air Temperature

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July 2006

PNO-IV-06-003A 07/07/2006

Arizona Public Service Company/Palo Verde Nuclear
Generating Station Unit 1: Update - Palo Verde Unit 1 Extended Shutdown to Repair Shutdown Cooling Valve Vibration

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June 2006

PNO-IV-06-009 06/30/2006 Union Electric Company/Callaway Plant: Radioactive Contamination Identified by Licensee at Locations Along the Plant Discharge Pipeline
PNO-IV-06-008A 06/30/2006 U.S. Department of the Interior, U.S. Geological Survey: Update - Leakage of Contaminated Water from Storage Tank
PNO-IV-06-008 06/27/2006 U.S. Department of the Interior, U.S. Geological Survey: Leakage of Contaminated Water from Storage Tank
PNO-III-06-016 06/21/2006 FirstEnergy Operating Company/Perry: Unusual Event Declared Due to Earth Quake
PNO-IV-06-007 06/19/2006 Team Industrial Services, Inc.: Radiographer's Radiation Dose in Excess of Regulatory Limits
PNO-III-06-015 06/13/2006 Braidwood: Braidwood Tritium Contamination Issues (Update)
PNO-II-06-002A 06/13/2006 Crystal River Nuclear Plant, Unit 3: Update of Region II Response to Tropical Storm Alberto
PNO-II-06-002 06/12/2006 Crystal River Nuclear Plant, Unit 3: Region II Response to Tropical Storm Alberto

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May 2006
PNO-II-06-001A 05/26/2006 Catawba Nuclear Station: Loss of Offsite Power and Dual Unit Reactor Trip (Update)
PNO-III-06-014 05/23/2006 Kewaunee: Procedure Adherence Problems During Reactor Startup
PNO-III-06-012A 05/17/2006 Dominion Energy Kewaunee, Inc.: Kewaunee Manual Reactor Shutdown Following Feedwater Pump Trip (Update)
PNO-IV-06-006 05/15/2006 Bozeman Deaconess Foundation: Medical Event Involving Iodine-125 Seed Implant
PNO-III-06-013 05/12/2006 Nuclear Management Company/Palisades Nuclear Plant: Shutdown to Investigate Control Rod Withdrawal Problem
PNO-I-06-008 05/03/2006 Contour Engineering: Agreement State Report of Worker Fatality and Damaged Moisture Density Gauge at Construction Site

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April 2006
PNO-III-06-012 04/28/2006 Dominion Energy Kewaunee, Inc./Kewaunee: Manual Reactor Shutdown Following Feedwater Pump Trip
PNO-III-06-004B 04/20/2006 Byron Units 1 and 2: Resumption of Effluent Discharges (Update)
PNO-I-06-007 04/19/2006 Team Industrial Services, Inc.: Radiography Source Failed to Retract
PNO-III-06-011 04/07/2006 Exelon Generation Co./Braidwood: Tritiated Steam Released to the Environment
PNO-III-06-010 04/07/2006 Exelon/Quad Cities 2: Cracking Identified in Unit 2 Steam Dryer
PNO-I-06-5A 04/07/2006 Millstone Unit 2: Update on Shutdown Greater than 72 Hours - Millstone Unit 2 Turbine Driven Auxiliary Feedwater Pump Rotating Assembly Degradation (Update)
PNO-III-06-009 04/06/2006 FirstEnergy Nuclear Operating Co./Perry Nuclear Power Plant: Low Level Tritium Identified in Underdrain System
PNO-I-06-006 04/06/2006 Certified Testing Laboratories, Inc.: Licensed Material in a Vehicle on Fire on a New Jersey Highway
PNO-III-06-008 04/03/2006 Indiana University Medical Center: Medical Event Involving Incorrect Brachytherapy Source Positioning

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March 2006
PNO-III-06-004A 03/31/2006 Exelon Generation Co/Byron: Tritium Leakage (Update)
PNO-III-06-007 03/30/2006 Exelon Generation Co/Braidwood: Tritium Contamination Issues
PNO-IV-06-005 03/29/2006 Columbia Generating Station, Energy Northwest: Notice of Unusual Event Due to Range Fire in Proximity of the Columbia Nuclear Plant
PNO-IV-06-004 03/29/2006 San Onofre, Unit 3, Southern California Edison Co.: Shutdown of San Onofre Unit 3 to Investigate Safety Injection Tank Gaskets
PNO-IV-06-003 03/29/2006 Palo Verde Nuclear Generating Station, Unit 1, Arizona Public Service Company: Palo Verde Unit 1 Extended Shutdown to Repair Shutdown Cooling Valve Vibration
PNO-IV-06-002 03/23/2006 South Texas Project Nuclear Operation Company: Fire Affecting Non Safety-Related Equipment Located in a Safety-Related Room
PNO-III-06-005B 03/20/2006 Exelon Generation Co/LaSalle: Unit 1 Restarts from Reactor Trip (Update)
PNO-IV-06-001 03/17/2006 Arizona Public Service Company/Palo Verde Nuclear Generating Station: Followup for Tritium Contamination Found in Water Onsite
PNO-III-06-005A 03/08/2006 Exelon Generation Co./LaSalle: Indication Failure for Three Control Rods Following Reactor Trip (Update)
PNO-I-06-004 03/03/2006 Philadelphia Fire Dept, Homeland Security/Counter Terrorism Force: Identification of Troxler Density Gauge Containing Radioactive Material in Northeast Philadelphia, Pennsylvania
PNO-I-06-003 03/02/2006 Susquehanna Steam Electric Station: Alert Declaration at Susquehanna

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February 2006
PNO-III-06-006 02/24/2006 Byron Nuclear Plant/Exelon Generation Co.: Unusual Event Declared Due to a Fire Within the Plant Protected Area
PNO-III-06-005 02/20/2006
LaSalle Unit 1/Exelon Generation Co.: LaSalle - Indication Failure for 3 Control Rods Following Reactor Trip
PNO-I-06-002 02/16/2006 Mostoller Landfill: Identification of Radioactive Material at a Pennsylvania Landfill
PNO-III-06-004 02/15/2006 Exelon Generation Co./Dresden and Byron: Tritium Leakage
PNO-III-06-003 02/06/2006 Nuclear Management Company/Prairie Island: Technical Specification Required Shutdown of Prairie Island Unit 2 for Greater than 72 Hours
PNO-I-06-001A 02/01/2006 Unison Industries, Inc.: Agreement State Report (Update)

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January 2006
PNO-I-06-001 01/30/2006 Unison Industries Inc.: Agreement State Report
PNO-III-06-002 01/23/2006 Davis-Besse: Security Event at Davis-Besse
PNO-III-06-001A 01/19/2006 Exelon Generation Co./Quad Cities: Degraded Actuators for Electromagnetic Relief Valves (Update)
PNO-III-06-001 01/17/2006 Exelon Generation Co./Quad Cities: Degraded Actuators for Electromagnetic Relief Valves
Page Last Reviewed/Updated Friday, August 23, 2013