United States Nuclear Regulatory Commission - Protecting People and the Environment

Preliminary Notification (PN) Reports for 2014

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July
PNO-I-14-003 07/29/2014 Dominion Nuclear Connecticut, Inc./Millstone Power Station Units 2: Shutdown Greater than 72 Hours due to a Technical Specification Required Shutdown for the Turbine Driven Auxiliary Feedwater Pump
PNO-II-14-005A 07/24/2014 South Carolina Electric & Gas/V.C. Summer, Unit 1: Shutdown Greater Than 72 Hours Due to Leaking Pressurizer Safety Valve – (Update)
PNO-II-14-005 07/14/2014 South Carolina Electric & Gas/V.C. Summer, Unit 1: Shutdown Greater Than 72 Hours Due to Leaking Pressurizer Safety Valve
PNO-III-14-007 07/09/2014 FirstEnergy Nuclear Operating Company/Davis-Besse Nuclear Power Station: Unusual Event Due To Smoke Detector Alarm In Containment Building
June
PNO-III-14-006 06/11/2014 Execon Generation Co./Dresden, Unit 2 and Unit 3: Report of Tritium at Dresden Sewage Treatment Plant
PNO-I-14-002A 06/02/2014 Dominion Nuclear Connecticut, Inc./Millstone Power Station Units 2 & 3: Unusual Event Declared Due to Loss of Offsite Power and Dual Reactor Trips – (Update)
May
PNO-I-14-002 05/28/2014 Dominion Nuclear Connecticut, Inc./Millstone Power Station Units 2 & 3: Unusual Event Declared Due to Loss of Offsite Power and Dual Reactor Trips
April
PNO-III-14-005A 04/29/2014 Exelon Generation Co./Dresden Unit 2: Shutdown due to Main Transformer Damage – (Update)
PNO-III-14-003A 04/28/2014 FirstEnergy Nuclear Operating Company/Davis-Besse: Shield Building Restoration – (Update)
PNO-III-14-005 04/15/2014 Exelon Generation Co./Dresden Unit 2: Shutdown due to Main Transformer Damage
PNO-II-14-004 04/07/2014

Carolina Power & Light Co./Robinson Unit 2: Shutdown Due to Steam Generator Tube Leak – (Update)

PNO-III-14-004 04/03/2014

FirstEnergy Nuclear Operating Company/Perry Nuclear Power Plant: Notification of Unusual Event Due to Toxic Chemical Leak

March
PNO-II-14-002A 03/14/2014

Entergy Nuclear Operations, Inc./Palisades: Control Rod Drive Mechanism Housing Flaws

PNO-II-14-004 03/10/2014 Carolina Power & Light Co./Robinson Unit 2: Shutdown Due to Steam Generator Tube Leak
February
PNO-III-14-003 02/19/2014 FirstEnergy Nuclear Operating Company/Davis-Besse: Shield Building Voids
January
PNO-III-14-001A 02/07/2014 Northern States Power Co./Monticello: Shutdown Due To Reactor Coolant System (RCS) Pressure Boundary Leakage In Excess Of Technical Specification Limits – (Update)
PNO-III-14-002 01/30/2014 Entergy Nuclear Operations, Inc.: Palisades Control Rod Drive Mechanism Housing Flaws
PNO-I-14-001 01/27/2014 Constellation Energy Nuclear Group, LLC/Calvert Cliffs Nuclear Power Plant: Dual Unit Trip Following the Loss of the '21' 13 kV Bus
PNO-II-14-001 01/21/2014 Progress Energy Carolinas, Inc. (PEC)/Harris Unit 1: Shutdown and Alert Declared due to Fire
PNO-III-14-001 01/21/2014 Northern States Power Co./Monticello: Shutdown Due To RCS Pressure Boundary Leakage In Excess Of Technical Specification Limits
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Page Last Reviewed/Updated Tuesday, July 29, 2014