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Due to a lapse in appropriations, the NRC has ceased normal operations. However, excepted and exempted activities necessary to maintain critical health and safety functions—as well as essential progress on designated critical activities, including those specified in Executive Order 14300—will continue, consistent with the OMB-Approved NRC Lapse Plan.

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Preliminary Notification (PN) Reports for 2015

| January | February | March | April | May | June | July | August | September | October | November | December |

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December
PNO-III-15-010A 12/03/2015 Northern States Power Co.: (Update) Monticello Automatic Scram Due to Reactor Protection System Signal
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November
PNO-III-15-010 11/27/2015 Northern States Power Co.: Monticello Automatic Scram Due to Reactor Protection System Signal
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October
PNO-III-15-009A 10/02/2015 DTE Energy Company: (Update) Fermi Power Plant – Unplanned Shutdown Greater than 72 Hours Following the Loss of Cooling Water in the Turbine Building
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September
PNO-III-15-009 09/15/2015 DTE Energy Company: Fermi Power Plant – Unplanned Shutdown Greater than 72 Hours Following the Loss of Cooling Water in the Turbine Building
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August
PNO-IV-15-02-A 08/26/2015 International Isotopes Incorporated: (Update) – Personnel Radiation Overexposure in Excess of Regulatory Limits
PNO-IV-15-02 08/21/2015 International Isotopes Incorporated: Personnel Radiation Overexposure in Excess of Regulatory Limits
PNO-II-15-002A 08/19/2015 Honeywell International, Inc.: (Update) – Alert At Honeywell Metropolis Works Due To Uf6 Leak
PNO-II-15-002 08/02/2015 Honeywell International, Inc.: Alert At Honeywell Metropolis Works Due To Uf6 Leak
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July
PNO-III-15-007-A 07/30/2015 Indiana Michigan Power Company: (Update) – Technical Specification Required Shutdown of D.C. Cook Unit 1 due to an Inoperable Emergency Diesel Generator
PNO-IV-15-001-A 07/28/2015 Union Electric Company: (Update) – Callaway Plant Technical Specification Shutdown Due To Reactor Coolant System Leakage
PNO-IV-15-001 07/24/2015 Union Electric Company: Callaway Plant Technical Specification Shutdown Due to Reactor Coolant System Leakage
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June
PNO-III-15-008 06/09/2015 Northern States Power Co.: Prairie Island Unit 2 Shutdown due to Trip of Main Power Turbine
PNO-III-15-007 06/02/2015 Indiana Michigan Power Company: Technical Specification Required Shutdown of D.C. Cook Unit 1 due to an Inoperable Emergency Diesel Generator
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May
PNO-I-15-002A 05/27/2015 Entergy Nuclear Operations, Inc.: (Update) – Indian Point Nuclear Power Station Unit No. 3 – Shutdown Greater than 72 Hours due to Reactor Trip Following #31 Main Transformer Failure
PNO-III-15-006 05/13/2015 FirstEnergy Nuclear Operating Co: Shutdown of Davis-Besse Due to Secondary Side Steam Line Rupture
PNO-I-15-002 05/11/2015 Entergy Nuclear Operations, Inc.: Indian Point Nuclear Power Station Unit No. 3 – Shutdown Greater than 72 Hours due to Reactor Trip Following #31 Main Transformer Failure
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April
PNO-III-15-005A 04/06/2015 DTE Energy Company: (Update) – Fermi Power Plant – Unplanned Shutdown Greater Than 72 Hours Following a Cooling Water Leak in Containment
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March
PNO-III-15-003A 03/26/2015 Northern States Power Co.: (Update) – Shutdown of Prairie Island Unit 2 Due to Loss of Instrument Air to Containment Building
PNO-III-15-005 03/24/2015 DTE Energy Company: Fermi Power Plant – Unplanned Shutdown Greater Than 72 Hours Following a Cooling Water Leak in Containment
PNO-III-15-004 03/10/2015 Exelon Generation Company, LLC: Byron Unit 1 Automatic Shutdown After Falling Ice Caused Main Power Transformer Short Circuit
PNO-III-15-003 03/10/2015 Northern States Power Co.: Shutdown of Prairie Island Unit 2 Due To Loss of Instrument Air To Containment Building and Notification of Unusual Event
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February
PNO-II-15-001A 02/23/2015 NextEra Energy: (Update) – St. Lucie, Unit 2 – Shutdown Greater than 72 Hours due to Condenser Tube Leak
PNO-II-15-001 02/17/2015 NextEra Energy: St. Lucie, Unit 2 – Shutdown Greater than 72 Hours due to Condenser Tube Leak
PNO-III-15-001A 02/17/2015 Northern States Power Co.: (Update) – Shutdown of Prairie Island Unit 1 due to Increasing Trend in Reactor Coolant System Leakage
PNO-III-15-002 02/11/2015 Exelon Generation Co.: Dresden Unit 2 Shutdown due to Loss Of Feedwater Level Control
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January
PNO-I-15-001 01/29/2015 Pilgrim Nuclear Power Station: Shutdown greater than 72 hours due to Reactor Scram following a Partial Loss of Offsite Power
PNO-III-15-001 01/27/2015 Northern States Power Co.: Shutdown of Prairie Island Unit 1 due to Increasing Trend In Reactor Coolant System Leakage
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Page Last Reviewed/Updated Tuesday, March 09, 2021

Page Last Reviewed/Updated Tuesday, March 09, 2021