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	Issue date	Title	Topic
PNO-III-98-035A, on 980624,reactor Tripped Automatically During Recovery Activities from Tornado Which Damaged Electrical Switchyard & Cut Off Offsite Power Supply	26 June 1998	PNO-III-98-035A:on 980624,reactor Tripped Automatically During Recovery Activities from Tornado Which Damaged Electrical Switchyard & Cut Off Offsite Power Supply
PNO-III-98-035, on 980624,plant Automatically Shut Down After Tornado Damaged Electrical Switchyard & Cut Off Offsite Power Supply.Licensee Declared Alert Under Emergency Plan. Licensee Assessing Extent of Damage	25 June 1998	PNO-III-98-035:on 980624,plant Automatically Shut Down After Tornado Damaged Electrical Switchyard & Cut Off Offsite Power Supply.Licensee Declared Alert Under Emergency Plan. Licensee Assessing Extent of Damage
PNO-III-98-009, on 980123,licensee Declared Unusual Event Under Emergency Plan Because of Spill of Up to 275 Gallons of Refrigerant Called Trichlorethylene.No Plant Personnel Were in Bldg at Time of Spill	23 January 1998	PNO-III-98-009:on 980123,licensee Declared Unusual Event Under Emergency Plan Because of Spill of Up to 275 Gallons of Refrigerant Called Trichlorethylene.No Plant Personnel Were in Bldg at Time of Spill
PNO-III-93-066, on 931202,licensee Commenced Shutdown to Replace Seal on RRP a Due to Indications of Increasing Degradation.License Estimates Outage Will Last Seven Days. Region III Will Monitor Plant Shutdown & Outage Activities	2 December 1993	PNO-III-93-066:on 931202,licensee Commenced Shutdown to Replace Seal on RRP a Due to Indications of Increasing Degradation.License Estimates Outage Will Last Seven Days. Region III Will Monitor Plant Shutdown & Outage Activities
PNO-III-93-018, on 930326,licensee Reported That Licensed Senior Reactor Operator Tested Positive for Alcohol During Routine Medical Exam.Individual Not Performing NRC-licensed Duties at Time of Incident,At Site Only for Medical Exam	26 March 1993	PNO-III-93-018:on 930326,licensee Reported That Licensed Senior Reactor Operator Tested Positive for Alcohol During Routine Medical Exam.Individual Not Performing NRC-licensed Duties at Time of Incident,At Site Only for Medical Exam
PNO-III-93-002B, on 930109,plant Shutdown for Leak Testing Other Maint Activities,Including Testing of Msiv.One Fuel Assembly Identified as Containing One Leaking Rod & Nine Fuel Assemblies Identified as Having Potential Leaks	1 February 1993	PNO-III-93-002B:on 930109,plant Shutdown for Leak Testing Other Maint Activities,Including Testing of Msiv.One Fuel Assembly Identified as Containing One Leaking Rod & Nine Fuel Assemblies Identified as Having Potential Leaks
PNO-III-93-002A, on 930109,plant Shut Down to Replace Leaking Fuel Bundle & Other Maint Acitivities,Including Testing of Main Steam Isolation Valves.Four Fuel Assemblies Have Been Confirmed as Containing One or More Leaking Rods	21 January 1993	PNO-III-93-002A:on 930109,plant Shut Down to Replace Leaking Fuel Bundle & Other Maint Acitivities,Including Testing of Main Steam Isolation Valves.Four Fuel Assemblies Have Been Confirmed as Containing One or More Leaking Rods
PNO-III-93-002, on 930109,unit Was Shut Down to Identify & Replace Leaking Fuel Bundle & to Perform Other Maint Activities.All Fuel Bundles Will Be Tested for Leakage & Any Leaking Bundles Will Be Replaced	11 January 1993	PNO-III-93-002:on 930109,unit Was Shut Down to Identify & Replace Leaking Fuel Bundle & to Perform Other Maint Activities.All Fuel Bundles Will Be Tested for Leakage & Any Leaking Bundles Will Be Replaced
PNO-III-92-058, on 921022,licensee Identified 7 Inch Long Crack at Weld Interface Between First 18 Inch Weldlet & 30 Inch Condensate Header for Number 4 Direct Contact Feedwater Heater.Licensee Decided to Commence Plant Shutdown	26 October 1992	PNO-III-92-058:on 921022,licensee Identified 7 Inch Long Crack at Weld Interface Between First 18 Inch Weldlet & 30 Inch Condensate Header for Number 4 Direct Contact Feedwater Heater.Licensee Decided to Commence Plant Shutdown
PNO-III-91-054, on 911222,36-inch Fiberglass Pipe Carrying Circulating Cooling Water from Cooling Towers to Plant Broke Outside Turbine Bldg.Leak Subsequently Stopped When Operators Closed Valve in Broken Line	23 December 1991	PNO-III-91-054:on 911222,36-inch Fiberglass Pipe Carrying Circulating Cooling Water from Cooling Towers to Plant Broke Outside Turbine Bldg.Leak Subsequently Stopped When Operators Closed Valve in Broken Line
PNO-II-89-066, licensees Prepared for Adverse Weather Conditions Due to Hurricane.Briefings Held W/Key Managers on Responsibilities to Check All Trailers,Secure Crane Hooks & Increase Emergency Food Supplies	21 September 1989	PNO-II-89-066:licensees Prepared for Adverse Weather Conditions Due to Hurricane.Briefings Held W/Key Managers on Responsibilities to Check All Trailers,Secure Crane Hooks & Increase Emergency Food Supplies
PNO-II-89-066A, updates Status of Hurricane Hugo for Nuclear Facilities in Southeast.Manning of Incident Response Ctr by Region II Continuing	21 September 1989	PNO-II-89-066A:updates Status of Hurricane Hugo for Nuclear Facilities in Southeast.Manning of Incident Response Ctr by Region II Continuing
PNO-III-89-061, on 890913,reactor Recirculation Valve Drifted Open from Normal 56% to About 78% Following Maint.Caused by Solenoid Valve Failure in mid-position Allowing Excessive Oil to Flow to Control Valve.State of Oh Notified	14 September 1989	PNO-III-89-061:on 890913,reactor Recirculation Valve Drifted Open from Normal 56% to About 78% Following Maint.Caused by Solenoid Valve Failure in mid-position Allowing Excessive Oil to Flow to Control Valve.State of Oh Notified
ML20247N007	11 September 1989	PNS-I-89-015:revised Notification of Telephone Threat, Correcting Event Date from 890909 to 890911.Call, Originating from Limerick or Peach Bottom,Received at Corporate Ofc.On 890525,threat Received at Peach Bottom
PNO-V-89-047, on 890808,earthquake & Aftershock of 5.1 & 4.2 Magnitudes,Respectively,Occurred Approx 15 Miles Southwest of San Jose,Ca.Reactors Shutdown During Earthquake.Tour of GE Reactor Disclosed No Damage	8 August 1989	PNO-V-89-047:on 890808,earthquake & Aftershock of 5.1 & 4.2 Magnitudes,Respectively,Occurred Approx 15 Miles Southwest of San Jose,Ca.Reactors Shutdown During Earthquake.Tour of GE Reactor Disclosed No Damage	Earthquake
PNO-IV-89-045, on 890703,earthquake Near Tremonton,Ut Occurred.Earthquake Safety Interlocks Did Not Trip & No Damage Occurred	5 July 1989	PNO-IV-89-045:on 890703,earthquake Near Tremonton,Ut Occurred.Earthquake Safety Interlocks Did Not Trip & No Damage Occurred	Earthquake
PNO-III-89-032, on 890425,while Plant Was in First Refueling Outage,Approx 30,000 Gallons of Condensate Storage Tank Water Inadvertently Was Drained Into Suppression Pool,W/Some Water Entering Drywell Over Weir Wall	28 April 1989	PNO-III-89-032:on 890425,while Plant Was in First Refueling Outage,Approx 30,000 Gallons of Condensate Storage Tank Water Inadvertently Was Drained Into Suppression Pool,W/Some Water Entering Drywell Over Weir Wall
PNO-V-89-022, on 880403,earthquake of Magnitude of 4.5 on Richter Scale Occurred 10 Miles Northeast of San Jose,Ca. Automatic Seismic Protection Did Not Trigger Shutdown. Reactors Manually Shutdown.No Radioactive Release Occurred	3 April 1989	PNO-V-89-022:on 880403,earthquake of Magnitude of 4.5 on Richter Scale Occurred 10 Miles Northeast of San Jose,Ca. Automatic Seismic Protection Did Not Trigger Shutdown. Reactors Manually Shutdown.No Radioactive Release Occurred	Earthquake
PNO-IV-89-020, Region IV Notified of Recent Reactor Trip at Palo Verde Unit 3 That Was Complicated by Inability to Open Steam Generator Atmospheric Dump Valves Mfg by Control Components,Inc.No Sticking Problems Noted at Other Plants	23 March 1989	PNO-IV-89-020:Region IV Notified of Recent Reactor Trip at Palo Verde Unit 3 That Was Complicated by Inability to Open Steam Generator Atmospheric Dump Valves Mfg by Control Components,Inc.No Sticking Problems Noted at Other Plants
PNO-III-88-104, on 881221,licensee Detected Increased Airborne Radioactivity in Turbine & Offgas Bldgs.Airborne Activity Escaped from Offgas Treatment Sys When Water Seals in Sys Drain Lines Were Lost	22 December 1988	PNO-III-88-104:on 881221,licensee Detected Increased Airborne Radioactivity in Turbine & Offgas Bldgs.Airborne Activity Escaped from Offgas Treatment Sys When Water Seals in Sys Drain Lines Were Lost	Loop seal
PNO-I-88-116, on 881108,voters Voted Down state-wide Referendum to Shutdown Plants in State of Ma If Nuclear Waste Produced in Process	9 November 1988	PNO-I-88-116:on 881108,voters Voted Down state-wide Referendum to Shutdown Plants in State of Ma If Nuclear Waste Produced in Process
PNO-III-88-081, on 880916,reactor Operators Observed Decrease in Flow Through Offgas Sys,Coupled W/Drop in Generator Electrical Output & Decrease in Main Condenser Vacuum. Plant Shut Down for Investigation Into Offgas Problem	19 September 1988	PNO-III-88-081:on 880916,reactor Operators Observed Decrease in Flow Through Offgas Sys,Coupled W/Drop in Generator Electrical Output & Decrease in Main Condenser Vacuum. Plant Shut Down for Investigation Into Offgas Problem	Loop seal
PNO-III-88-078, on 880904,fire Occurred in Two Charcoal Adsorber Tanks in Offgas Sys.Cause Under Investigation. Nitrogen Purge of Tanks Performed & Temps Reduced	6 September 1988	PNO-III-88-078:on 880904,fire Occurred in Two Charcoal Adsorber Tanks in Offgas Sys.Cause Under Investigation. Nitrogen Purge of Tanks Performed & Temps Reduced	Loop seal
PNO-V-88-044, on 880627,earthquake Occurred 5 Miles East of Santa Cruz,Ca.Seismic Instrumentation Not Triggered at Vallecitos,Aerotest Operations or at Univ of California at Berkeley	27 June 1988	PNO-V-88-044:on 880627,earthquake Occurred 5 Miles East of Santa Cruz,Ca.Seismic Instrumentation Not Triggered at Vallecitos,Aerotest Operations or at Univ of California at Berkeley	Earthquake
PNO-III-88-058, on 880623,reactor Scrammed from 84% Power Due to Turbine Trip.Caused by Damaged Latching Mechanism in Turbine Control Sys.Latching Mechanism Repaired	24 June 1988	PNO-III-88-058:on 880623,reactor Scrammed from 84% Power Due to Turbine Trip.Caused by Damaged Latching Mechanism in Turbine Control Sys.Latching Mechanism Repaired
PNO-III-88-055, on 880616,reactor Scrammed Due to High Power Level in Reactor Core.Caused by Spurious Signal Generated After Reinsertion of Printed Circut Board in Recirculation Control Sys.Cause of Spurious Signal Under Investigation	17 June 1988	PNO-III-88-055:on 880616,reactor Scrammed Due to High Power Level in Reactor Core.Caused by Spurious Signal Generated After Reinsertion of Printed Circut Board in Recirculation Control Sys.Cause of Spurious Signal Under Investigation
PNO-V-88-038, on 880612,earthquake Occurred on Calaveras Fault within 50 Miles of Identified Facilities.All Reactors Shutdown at Time of Earthquake.No Seismic Trips Observed. Insp Revealed No Signs of Damage at Facilities	13 June 1988	PNO-V-88-038:on 880612,earthquake Occurred on Calaveras Fault within 50 Miles of Identified Facilities.All Reactors Shutdown at Time of Earthquake.No Seismic Trips Observed. Insp Revealed No Signs of Damage at Facilities	Earthquake
PNO-III-88-045, on 880518,licensee Began Plant Shutdown from 100% Power to Repair Hydrogen Seal Oil Sys for Main Generator.Caused by Sys Level Controller Failure.Seal Oil Sys Repair & Main Generator Inspection Scheduled	18 May 1988	PNO-III-88-045:on 880518,licensee Began Plant Shutdown from 100% Power to Repair Hydrogen Seal Oil Sys for Main Generator.Caused by Sys Level Controller Failure.Seal Oil Sys Repair & Main Generator Inspection Scheduled
PNO-IV-88-040, on 880509,System Energy Resources,Inc to Manage & Operate All Middle South Nuclear Plants.Arkansas Power & Light & Louisiana Power & Light Will Apply for Appropriate License Amends	9 May 1988	PNO-IV-88-040:on 880509,System Energy Resources,Inc to Manage & Operate All Middle South Nuclear Plants.Arkansas Power & Light & Louisiana Power & Light Will Apply for Appropriate License Amends
PNO-III-88-016, on 880304,licensee Declared Alert After Both Trains of Decay Heat Removal Sys Were Declared Inoperable	7 March 1988	PNO-III-88-016:on 880304,licensee Declared Alert After Both Trains of Decay Heat Removal Sys Were Declared Inoperable
PNO-III-88-012, on 880222,unit Operating at Approx 100% Power,Drywell Floor Drain Sump Instrumentation Detected Unidentified Leakage Increase from 2.5 Gpm to 4.6 Gpm	23 February 1988	PNO-III-88-012:on 880222,unit Operating at Approx 100% Power,Drywell Floor Drain Sump Instrumentation Detected Unidentified Leakage Increase from 2.5 Gpm to 4.6 Gpm
PNO-I-88-020, on 880216,CA Mcneill Named Executive Director - Nuclear W/Responsibility of Directing Nuclear Operations, Including Nuclear Dept Reorganization & Restart Efforts of Peach Bottom	16 February 1988	PNO-I-88-020:on 880216,CA Mcneill Named Executive Director - Nuclear W/Responsibility of Directing Nuclear Operations, Including Nuclear Dept Reorganization & Restart Efforts of Peach Bottom
PNO-I-88-017, on 880202,util to Announce Change to Corporate Mgt,Per Highly Critical INPO Ltr.Jh Austin Will Retire as of 880301 & Jl Everett Will Assume Duties of President Until Replacement Named	2 February 1988	PNO-I-88-017:on 880202,util to Announce Change to Corporate Mgt,Per Highly Critical INPO Ltr.Jh Austin Will Retire as of 880301 & Jl Everett Will Assume Duties of President Until Replacement Named
PNO-I-88-001, on 880104,realignment of Nuclear Mgt Updated. Action Provides for Corporate Officer at Each Plant to Elevate Level of Plant in Corporate Mgt Structure	4 January 1988	PNO-I-88-001:on 880104,realignment of Nuclear Mgt Updated. Action Provides for Corporate Officer at Each Plant to Elevate Level of Plant in Corporate Mgt Structure
PNO-III-87-148, low But Detectable Levels of I-131 Measured from Sample of Sewage Sludge Analyzed for Radioactivity,Per Resident 871125 Request.Second Sample Collected & Measured on 871202.No Evidence of Abnormal Releases from Plant	3 December 1987	PNO-III-87-148:low But Detectable Levels of I-131 Measured from Sample of Sewage Sludge Analyzed for Radioactivity,Per Resident 871125 Request.Second Sample Collected & Measured on 871202.No Evidence of Abnormal Releases from Plant
PNO-III-87-146, on 871129,one Valve Did Not Perform Properly During Surveillance Testing of Msiv.Caused by Deformation of Seal Matls in solenoid-operated Pilot Valve Due to Excessive Heat from Steam Leaks.Valves Rebuilt	30 November 1987	PNO-III-87-146:on 871129,one Valve Did Not Perform Properly During Surveillance Testing of Msiv.Caused by Deformation of Seal Matls in solenoid-operated Pilot Valve Due to Excessive Heat from Steam Leaks.Valves Rebuilt	Stroke time
PNO-V-87-076, on 871123-24,two Moderate Earthquakes Centered Near Westmoreland,Ca Occurred,Triggering Seismic Alarms at San Onofre.Unusal Event Declared.Plant Sys & Components Not Adversely Affected.Effects on Other Locations Noted	24 November 1987	PNO-V-87-076:on 871123-24,two Moderate Earthquakes Centered Near Westmoreland,Ca Occurred,Triggering Seismic Alarms at San Onofre.Unusal Event Declared.Plant Sys & Components Not Adversely Affected.Effects on Other Locations Noted	Earthquake
PNO-III-87-138, on 871103,reactor Shutdown After Two MSIV Failed to Close.Valves Recycled Resulting in Acceptable Time Responses.Augumented Insp Team Dispatched to Plant Site to Review Possible Causes of MSIV Closure Problems	3 November 1987	PNO-III-87-138:on 871103,reactor Shutdown After Two MSIV Failed to Close.Valves Recycled Resulting in Acceptable Time Responses.Augumented Insp Team Dispatched to Plant Site to Review Possible Causes of MSIV Closure Problems
PNO-III-87-137, on 871027,reactor Srammed & ECCS Actuation Occurred Due to Deenergized Bus L12.Caused by Operator Mistakenly Tripping Supply Breaker from Transformer to Bus. Power Restored	27 October 1987	PNO-III-87-137:on 871027,reactor Srammed & ECCS Actuation Occurred Due to Deenergized Bus L12.Caused by Operator Mistakenly Tripping Supply Breaker from Transformer to Bus. Power Restored
PNO-II-87-069, on 871012,Turkey Point Units 3 & 4 Declared NOUE Based on Potential for Hurricane Force Winds & Technical Support Ctr Activated for Mgt of Storm Preparation & Operations.St Lucie Also Made Severe Weather Preparations	13 October 1987	PNO-II-87-069:on 871012,Turkey Point Units 3 & 4 Declared NOUE Based on Potential for Hurricane Force Winds & Technical Support Ctr Activated for Mgt of Storm Preparation & Operations.St Lucie Also Made Severe Weather Preparations