United States Nuclear Regulatory Commission - Protecting People and the Environment

Preliminary Notification (PN) Reports for 2007

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December 2007

PNO-III-07-016

12/26/2007

Nuclear Management Company: Prairie Island - Unplanned Unit 1 Shutdown Greater Than 72 Hours

PNO-II-07-009C

12/19/2007

Joseph M. Farley, Unit 1: Farley Augmented Inspection Team (AIT) (Update)

PNO-III-07-015A

12/06/2007

FirstEnergy Nuclear Operating Company/Perry Nuclear Power Station: Perry scram and feedwater loss (Update)

 
November 2007

PNO-III-07-015

11/28/2007

FirstEnergy Nuclear Operating Company/Perry Nuclear Power Station: Perry scram and feedwater loss

PNO-III-07-014

11/27/2007
Exelon Generation Co., Byron, IL; Byron Unit 1: Nitrogen Leak During Maintenance

PNO-IV-07-011

11/26/2007
Palo Verde Nuclear Generating Station (PVNGS): Unit 1 Technical Specification Required Shutdown

PNO-I-07-010

11/14/2007
Amergen Energy Company, LLC: Notification of Unusual Event Due to Indication of Unexpected Inventory Loss while in a Drain Down Condition

PNO-II-07-012A

11/07/2007
Catawba Nuclear Stations: Onsite Ground Water Tritium Contamination at the Catawba Nuclear Station Site (Update)

PNO-IV-07-010

11/02/2007
Palo Verde Nuclear Generating Station: Palo Verde Nuclear Generating Station (PVNGS) Notification of Unusual Event

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October 2007

PNO-III-07-012A

10/31/2007 Exelon Generation Company, LLC: Both Units at Byron Shut Down Due to Leak in Pipe (Update)

PNO-III-07-013

10/30/2007
Karmanos Cancer Center: Medical Event

PNO-IV-07-008D

10/26/2007
Southern California Edison Company San Onofre Units 2 & 3: Southern California Brush Fires and San Onofre Nuclear Generating Station Status (Update)

PNO-IV-07-008C

10/25/2007
Southern California Edison Company San Onofre Units 2 & 3: Southern California Brush Fires and San Onofre
Nuclear Generating Station (SONGS) Status (Update)

PNO-IV-07-008B

10/25/2007
Southern California Edison Company San Onofre Units 2 & 3: Southern California Brush Fires and San Onofre Nuclear Generating Station Status (Update)

PNO-II-07-013

10/24/2007
Browns Ferry 1, 2 and 3: Browns Ferry Refueling Floor Crane Cable Deformation

PNO-IV-07-009

10/24/2007
Entergy Operations, Inc. (Arkansas Nuclear One): Alert at Arkansas Nuclear One Unit 2

PNO-IV-07-008A

10/23/2007
Southern California Edison Company San Onofre Units 2 & 3: Southern California Brush Fires and San Onofre Nuclear Generating Station Status (Update)

PNO-IV-07-008

10/23/2007
Southern California Edison Company San Onofre Units 2 & 3: Southern California Brush Fires and San Onofre Nuclear Generating Station Status

PNO-III-07-012

10/23/2007 Exelon Generation Company, LLC: Both Units at Byron Shut Down Due to Leak in Pipe

PNO-II-07-009B

10/22/2007 Farley Unit 1: Extended Farley Augmented Inspection Team (AIT) (Update)

PNO-IV-07-007

10/22/2007 Arizona Public Service Company: Palo Verde Nuclear Generating Station, Unit 1 Technical Specification Required Reactor Shutdown

PNO-III-08-011

10/16/2007 Exelon Nuclear Generating Company: Tritium Leakage

PNO-III-07-010A

10/15/2007 Fermi: Unusual Event Terminated at Fermi & Special Inspection Team Dispatched (Update)

PNO-III-07-010

10/12/2007 Fermi: Unusual Event Declared at Fermi Due at Unexpected Piping Hole and Indentations

PNO-II-07-012

10/11/2007 Catawba Nuclear Station Units 1 & 2: Onsite Ground Water Tritium Contamination

PNO-II-07-011A

10/01/2007 Browns Ferry Unit 3: Pressure Boundary Leakage Discovered During Drywell Inspection (Update)

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September 2007

PNO-II-07-009A

09/28/2007 Joseph M. Farley Nuclear Plant Unit 1: Component Cooling Water Pump Breaker Failures (Update)
PNO-II-07-011 09/24/2007 Browns Ferry Unit 3: Pressure Boundary Leakage Discovered During Drywell Inspection

PNO-I-07-009

09/20/2007 Nine Mile Point Unit 2: Inadvert Discharge of Carbon Dioxide

PNO-I-07-008

09/14/2007 Vermont Yankee: Restoration of West Cooling Towers

PNO-II-07-010

09/10/2007 McGuire Nuclear Station: Special Inspection To Review Charging Pump Oil Coolers

PNO-II-07-009

09/10/2007 Joseph M. Farley Nuclear Plant Unit 1: Component Cooling Water Pump Breaker Failures

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August 2007

PNO-II-07-008A

08/31/2007 St. Lucie Unit 2: Shutdown to Repair Reactor Coolant Pump Seal Injection Line Leak (Update)

PNO-II-07-008

08/20/2007 St. Lucie Unit 2: Shutdown to Repair Reactor Coolant Pump Seal Injection Line Leak

PNO-I-07-007

08/08/2007 Peach Bottom Nuclear Generating Station: Alert Declared due to Carbon Dioxide Leak from a Portable Fire Extinguisher in the Diesel Generator Building

PNO-II-07-007

08/02/2007 Brunswick Steam and Electric Plant (Unit 1): Unit 1, ‘B’ Residual Heat Removal Service Water Motor Operated Supply Valve Failure
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July 2007

PNO-III-07-009A

07/24/2007 First Energy Nuclear Operating Company: Unexpected Reactor Shut Down Exceeding 72 Hours Due to Problem with Reactor Recirculation Pump Motor (Update)

PNO-I-07-006A

07/24/2007 Oyster Creek: Reactor Scram on Low Reactor Vessel Water Level Due to a Trip of the 'C' Reactor Feed Pump (Update)

PNO-I-07-006

07/19/2007 Oyster Creek: Reactor Scram on Low Reactor Vessel Water Level Due to a Trip of the 'C' Reactor Feed Pump

PNO-III-07-009

07/05/2007 First Energy Nuclear Operating Company: Unexpected Reactor Shut Down Exceeding 72 Hours Due to Problem with Reactor Recirculation Pump Motor

PNO-II-07-006

07/02/2007 North Anna Power Station (Unit 2): Unit 2 Spurious Safety Injection Partial Actuation and Reactor Trip

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June 2007

PNO-IV-07-006A

06/27/2007 San Onofre Nuclear Generating Station Unit 2: Unit 2 Reactor Shutdown (Update)

PNO-III-07-008A

06/26/2007 Point Beach Unit 1: Unit 1 Reactor Shutdown (Update)

PNO-IV-07-006

06/22/2007 San Onofre Nuclear Generating Station Unit 2: Unit 2 Reactor Shutdown

PNO-III-07-008

06/18/2007 Point Beach Unit 1: Unit 1 Reactor Shutdown

PNO-II-07-005

06/14/2007 Brunswick Steam Electric Plant: Onsite Surface Water and Ground Water Tritium Contamination

PNO-III-07-007A

06/11/2007 Point Beach Unit 1: Manual Reactor Trip (Update)

PNO-III-07-007

06/08/2007 Point Beach Unit 1: Manual Reactor Trip

PNO-IV-07-005A

06/04/2007 River Bend Station: Reactor Shutdown Due to Unexpected Change in Recircuation Flow (Update)

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May 2007
PNO-IV-07-005 05/23/2007 River Bend Station: Reactor Shutdown Due to Unexpected Change in Recirculation Flow
PNO-III-07-006A 05/14/2007 Entergy Nuclear Operations, Inc.: Palisades Shutdown Due to Low Steam Generator Level (Update)
PNO-III-07-006 05/09/2007 Entergy Nuclear Operations, Inc.: Palisades Shutdown Due to Low Steam Generator Level

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April 2007
PNO-II-07-004 04/25/2007 Vogtle Nuclear Plant Unit 2: Automatic Reactor Trip/ Plant Shutdown Greater Than 72 Hours
PNO-I-07-004A 04/20/2007 Indian Point Unit 3: Unusual Event Declared Due to Explosion in 31 Main Power Transformer at Indian Point Unit 3 (Update)
PNO-I-07-005 04/20/2007 Cardinal Health, Inc.: Stolen Nuclear Medicine Syringes
PNO-IV-07-004A 04/11/2007 Energy Northwest (Columbia Generating Station):
Forced Outage Resulting from a Technical Specification Required Plant Shut Down (Update)
PNO-IV-07-004 04/09/2007 Energy Northwest (Columbia Generating Station): Alert Declaration Due to a Transformer Fire and Initiation
of a Technical Specification Required Plant Shutdown
PNO-I-07-004 04/06/2007 Indian Point Unit 3.: Notification of Unusual Event (NOUE) Declared Due to Fire in 'B' Phase Main Power Transformer at Indian Point Unit 3
PNO-IV-07-003 04/05/2007 Callaway Nuclear Station: Callaway Alert Declaration Due to a Suspected Transformer Fire
PNO-II-07-003 04/03/2007 Brunswick Unit 1: Plant Shutdown Required by Technical Specifications

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March 2007
PNO-I-07-003A 03/26/2007 Underwood Engineering Testing Co., Inc.:
Found Troxler Moisture/Density Portable Gauge (Update)
PNO-I-07-003 03/23/2007 Underwood Engineering Testing Co., Inc.:
Found Troxler Moisture/Density Portable Gauge
PNO-III-07-005 03/20/2007 Nuclear Management Co./Prairie Island: Prairie Island Non-Credible Bomb Threat
PNO-III-07-004A 03/12/2007 Kewaunee: Reactor Shutdown (Update)
PNO-II-07-002
03/09/2007 Vogtle: Vogtle Unit 2 Notification of Unusual event (Noue) Due to Reactor Coolant System (RCS) Leakage in Excess of 10 Gallons Per Minute (GPM)
PNO-IV-07-001A
03/07/2007 IPS: Update: Radiation Dose in Excess of Regulatory Limits
PNO-III-07-003A 03/05/2007 Palisades Nuclear Plant: Palisades Shutdown To Replace Heat-Damaged Cables (Update)
PNO-III-07-004 03/01/2007 Kewaunee: Reactor Shutdown

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February 2007
PNO-IV-07-002 02/27/2007 Southwest Research Institute: Report of Leaking Source
PNO-IV-07-001 02/27/2007 IPS: Radiation Does in Excess of Regulatory Limits
PNO-III-07-003 02/27/2007 Palisades Nuclear Plant: Palisades Shutdown To Replace Heat-Damaged Cables
PNO-I-07-002 02/27/2007 Peach Bottom Unit 3: Notification of Unusual Event Declared
PNO-I-06-013A 02/01/2007 Princeton University: Leaking Strontium-90 Plated Source Identified at University (Update)

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January 2007
PNO-III-07-002 01/26/2007 Potential Overexposure of a Radiographer
PNO-III-07-001A 01/22/2007 Nuclear Management Co./Monticello: Monticello Reactor Shutdown Due to Turbine Control Valve Failure (Update)
PNO-II-06-004B 01/22/2007 AREVA NP, Inc.: Workers Exposed To Hydrogen Fluoride (HF) Release (Update)
PNO-III-07-001 01/12/2007 Nuclear Management Company/Monticello: Monticello Reactor Shutdown Due to Turbine Control Valve Failure (Event Notification EN 43088)
PNO-II-07-001 01/04/2007 Paducah Gaseous Diffusion Plant: Press Interest in Transportation Accident
Page Last Reviewed/Updated Wednesday, February 26, 2014