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| Issue date | Title | Topic | |
|---|---|---|---|
| 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-93-002B, 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-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 | |
| 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-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-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-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-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-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-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-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-III-87-094, on 870709,w/unit in Shutdown for Maint,Smoke from Smoldering Fire in Main Condenser Observed.Smoke Emanated from Smoldering Piping Insulation Inside Condenser. Cause of Fire Unknown.No Release of Radioactivity Occurred | 9 July 1987 | PNO-III-87-094:on 870709,w/unit in Shutdown for Maint,Smoke from Smoldering Fire in Main Condenser Observed.Smoke Emanated from Smoldering Piping Insulation Inside Condenser. Cause of Fire Unknown.No Release of Radioactivity Occurred | |
| PNO-III-87-093, on 870630,operators Manually Tripped Reactor Following Detection of Hydrogen in Isophase Bus Ducting. Caused by Failed Main Generator Bushing.Unit Expected to Remain in Hot Shut Down While Bushing Being Replaced | 1 July 1987 | PNO-III-87-093:on 870630,operators Manually Tripped Reactor Following Detection of Hydrogen in Isophase Bus Ducting. Caused by Failed Main Generator Bushing.Unit Expected to Remain in Hot Shut Down While Bushing Being Replaced | |
| PNO-III-87-083A, on 870617,while Operating at 29% Power During Reactor Recirculation Test,Recirculation Pumps Tripped & Natural Circulation Established.Ait Being Sent to Site.Corrected Version of PNO-III-87-083 | 18 June 1987 | PNO-III-87-083A:on 870617,while Operating at 29% Power During Reactor Recirculation Test,Recirculation Pumps Tripped & Natural Circulation Established.Ait Being Sent to Site.Corrected Version of PNO-III-87-083 | |
| PNO-III-87-056A, on 870413,operators Manually Scrammed Unit from 3% Power Due to Steam Leak from Drain Line in Condenser Bay.Caused by Weld Failure During Excessive Turbulence.Parts of Line Replaced,Rerouted & Secured W/Addl Supports | 28 April 1987 | PNO-III-87-056A:on 870413,operators Manually Scrammed Unit from 3% Power Due to Steam Leak from Drain Line in Condenser Bay.Caused by Weld Failure During Excessive Turbulence.Parts of Line Replaced,Rerouted & Secured W/Addl Supports | |
| PNO-III-87-056, on 870413,unit Manually Scrammed Upon Discovery of Steam Leak from Turbine Bldg Condenser Bay Drain Line.Caused by Weld Failure.Cause of Failure Under Investigation | 14 April 1987 | PNO-III-87-056:on 870413,unit Manually Scrammed Upon Discovery of Steam Leak from Turbine Bldg Condenser Bay Drain Line.Caused by Weld Failure.Cause of Failure Under Investigation | |
| PNO-III-87-011, on 870123,licensee Began Shutdown from 5% Power to Repair Steam Isolation Valve for Turbine in RCIC Sys.During Testing,Valve Would Not Open Because of Failure of Motor Operator.Repair Expected to Take More than 2 Days | 23 January 1987 | PNO-III-87-011:on 870123,licensee Began Shutdown from 5% Power to Repair Steam Isolation Valve for Turbine in RCIC Sys.During Testing,Valve Would Not Open Because of Failure of Motor Operator.Repair Expected to Take More than 2 Days | |
| PNO-III-87-004, rept Submitted on 870107 to State of Oh Governor Rf Celeste Re Emergency Planning at Facilities Recommended That Plants Be Limited to 5% Power Until Emergency Planning Deficiencies Corrected | 7 January 1987 | PNO-III-87-004:rept Submitted on 870107 to State of Oh Governor Rf Celeste Re Emergency Planning at Facilities Recommended That Plants Be Limited to 5% Power Until Emergency Planning Deficiencies Corrected | |
| PNO-III-86-157, on 861230,while Operating at 8% Power,Util Began Unit Shut Down Because of High Conductivity (Water Impurity) Above Tech Spec Limits in Rcs.Caused by Tube Leak in Main Condenser.Condenser Tubes to Be Inspected | 31 December 1986 | PNO-III-86-157:on 861230,while Operating at 8% Power,Util Began Unit Shut Down Because of High Conductivity (Water Impurity) Above Tech Spec Limits in Rcs.Caused by Tube Leak in Main Condenser.Condenser Tubes to Be Inspected | |
| PNO-III-86-155, on 861223,US Court of Appeals,Sixth Circuit, Cincinnati,Oh,Lifted Stay Which Restricted Operation of Plant to 5 Percent Power.Licensee Plans to Start Plant Up During Weekend of 861227 & Resume Power Ascension Testing | 24 December 1986 | PNO-III-86-155:on 861223,US Court of Appeals,Sixth Circuit, Cincinnati,Oh,Lifted Stay Which Restricted Operation of Plant to 5 Percent Power.Licensee Plans to Start Plant Up During Weekend of 861227 & Resume Power Ascension Testing | |
| PNO-III-86-133, on 861113,NRC Issued Full Power Ol.Plant Startup Expected on 861116,following Maint & Mod Outage | 13 November 1986 | PNO-III-86-133:on 861113,NRC Issued Full Power Ol.Plant Startup Expected on 861116,following Maint & Mod Outage | |
| PNO-III-86-115, US Court of Appeals,Sixth Circuit,In Cincinnati,Oh,Rescinded 860904 Order Prohibiting NRC from Voting on Issuance of Full Power OL for Facility.State of Oh Will Be Notified | 14 October 1986 | PNO-III-86-115:US Court of Appeals,Sixth Circuit,In Cincinnati,Oh,Rescinded 860904 Order Prohibiting NRC from Voting on Issuance of Full Power OL for Facility.State of Oh Will Be Notified | |
| PNO-III-86-089, on 860904,electrical Fire Started in Listed Control Room Cabinet.Div 1 Containment Atmosphere Monitoring,Suppression Pool Makeup & Drywell Vacuum Relief Sys Declared Inoperable.Fire Extinguished.Damages Listed | 4 September 1986 | PNO-III-86-089:on 860904,electrical Fire Started in Listed Control Room Cabinet.Div 1 Containment Atmosphere Monitoring,Suppression Pool Makeup & Drywell Vacuum Relief Sys Declared Inoperable.Fire Extinguished.Damages Listed | |
| PNO-III-86-082, on 860815,R Celeste,Governor of Ohio, Announced Withdrawal of Support & Implementing Directive for Emergency Plans for Two Facilities.Ltr Sent to Lw Zech Encl | 15 August 1986 | PNO-III-86-082:on 860815,R Celeste,Governor of Ohio, Announced Withdrawal of Support & Implementing Directive for Emergency Plans for Two Facilities.Ltr Sent to Lw Zech Encl | Earthquake Chernobyl |
| PNO-III-86-059A, on 860623,util Continued to Maintain Nitrogen Atmosphere on Both Trains of Offgas Sys Charcoal Adsorbers.Highest Temp Reading 182 F at Bottom of Third Tank in Train B.Fire Out.Unusual Event Terminated | 23 June 1986 | PNO-III-86-059A:on 860623,util Continued to Maintain Nitrogen Atmosphere on Both Trains of Offgas Sys Charcoal Adsorbers.Highest Temp Reading 182 F at Bottom of Third Tank in Train B.Fire Out.Unusual Event Terminated | |
| PNO-III-86-059, on 860620,licensee Determined That Fire Existed in off-gas Treatment Sys Charcoal Absorbers.Caused by Space Heater.Reactor Shut Down at Time of Event & Will Remain Shut Down | 20 June 1986 | PNO-III-86-059:on 860620,licensee Determined That Fire Existed in off-gas Treatment Sys Charcoal Absorbers.Caused by Space Heater.Reactor Shut Down at Time of Event & Will Remain Shut Down | |
| PNO-III-86-055, on 860606,during Initial Criticality,Two Intermediate Source Range Monitors Did Not Respond to Neutron Flux & Were Declared Inoperable.Cause Not Stated. Channels Will Be Repaired | 6 June 1986 | PNO-III-86-055:on 860606,during Initial Criticality,Two Intermediate Source Range Monitors Did Not Respond to Neutron Flux & Were Declared Inoperable.Cause Not Stated. Channels Will Be Repaired | |
| PNO-III-86-056, on 860606,Cuyahoga County (State of Oh) Commission Proposed Extension of Emergency Planning Zone Beyond Current 10-mile Radius.Meeting W/Governor Celeste to Discuss Emergency Planning Requested | 6 June 1986 | PNO-III-86-056:on 860606,Cuyahoga County (State of Oh) Commission Proposed Extension of Emergency Planning Zone Beyond Current 10-mile Radius.Meeting W/Governor Celeste to Discuss Emergency Planning Requested | |
| PNO-III-86-028, on 860318,OL Issued.License Limited to Fuel Loading & Operation Up to 5% Power.Fuel Loading Will Take About 2 Wks to Complete | 19 March 1986 | PNO-III-86-028:on 860318,OL Issued.License Limited to Fuel Loading & Operation Up to 5% Power.Fuel Loading Will Take About 2 Wks to Complete | |
| PNO-III-86-023, on 860308,licensee Noted Drywell Pressure Instrument Isolated by Mispositioned Valve on Sys Declared Operable for Fuel Load.Mispositioning May Have Occurred During Mod & Maint Activities.Corrective Program Initiated | 14 March 1986 | PNO-III-86-023:on 860308,licensee Noted Drywell Pressure Instrument Isolated by Mispositioned Valve on Sys Declared Operable for Fuel Load.Mispositioning May Have Occurred During Mod & Maint Activities.Corrective Program Initiated | |
| PNO-III-86-009B, on 860206,small Earthquake Occurred.No After Shock Felt & No Instrumentation Registered Tremor. Earthquake on 860131 Resulted in No Structural Damage to Plant | 6 February 1986 | PNO-III-86-009B:on 860206,small Earthquake Occurred.No After Shock Felt & No Instrumentation Registered Tremor. Earthquake on 860131 Resulted in No Structural Damage to Plant | Earthquake |
| PNO-III-86-009A, on 860131,earthquake Experienced at Plant. Site Response Activities Accomplished by Implementing Emergency Plan,Although Action Not Required Prior to Licensing.No Significant Damage Noted | 3 February 1986 | PNO-III-86-009A:on 860131,earthquake Experienced at Plant. Site Response Activities Accomplished by Implementing Emergency Plan,Although Action Not Required Prior to Licensing.No Significant Damage Noted | Safe Shutdown Earthquake Operating Basis Earthquake Earthquake Scaffolding |
| PNO-III-86-009, on 860131,earthquake Felt at Plant.No Significant Damage Reported.Some Site Personnel Evacuated. Site Area Emergency Declared.Supporting Documentation Encl | 31 January 1986 | PNO-III-86-009:on 860131,earthquake Felt at Plant.No Significant Damage Reported.Some Site Personnel Evacuated. Site Area Emergency Declared.Supporting Documentation Encl | Earthquake |
| PNO-III-85-053, on 850625,utils Announced Signing of Agreement to Combine Under New Holding Company,Scheduled by End of 1985.Utils Will Retain Local Identity & Considerable Autonomy.Affiliation Will Increase Efficiency & Lower Costs | 26 June 1985 | PNO-III-85-053:on 850625,utils Announced Signing of Agreement to Combine Under New Holding Company,Scheduled by End of 1985.Utils Will Retain Local Identity & Considerable Autonomy.Affiliation Will Increase Efficiency & Lower Costs |