Category:PNO

P

• PNO-I-02-017, Susquehanna - Unusual Event Declared Due to Onsite Fire/Explosion within the Protection Area
• PNO-I-02-020, Unusual Event Due to a Hydrogen Gas Ignition in the Off-Gas System (39348)
• PNO-I-03-003, Unusual Event Due to a Safety Injection Signal & Closure of the Main Steam Isolation Valves (39616)
• PNO-I-03-004, Millstone Nuclear Power Station, Unit 2, Unusual Events Declared Due to Reactor Trip with Leakage from Charging System (EN Nos. 39644 and 39645)
• PNO-I-03-006, Seabrook Station, Unusual Event Due to a Potential Intruder Inside the Protected Area (39686)
• PNO-I-03-013, Reactor Trip from 100% Power Due to a Turbine Trip - Media and Public Interest
• PNO-I-03-014, Unusual Event Declared Due to Fire in the Main Turbine
• PNO-I-03-016, Oyster Creek Bargaining Unit Strike at Oyster Creek (39876)
• PNO-I-03-024, Salem Nuclear Power Plant, Units 1 & 2, Elevated Tritium Levels in Groundwater - New Information
• PNO-I-03-027, Dual Unit Reactor Scram Due to Electrical Grid Disturbance
• PNO-I-04-009, Yankee Atomic Electric Company, Spill of Low-Level Radioactive Waste from Package While in Transit
• PNO-I-04-010, Yankee Atomic Electric Company, Notification of Unusual Event
• PNO-I-04-012, Connecticut Yankee Atomic Power Company, Fire in Vacant Administration Building at Decommissioning Reactor Site
• PNO-I-04-014, Connecticut Yankee Atomic Power Company, Fire Inside Containment Structure at Decommissioning Reactor Site
• PNO-I-05-017, Alert Declared at Millstone 3 Due to Main Steam Safety Valve Not Reseating After an SI Actuation on Low Main Steam Line Pressure
• PNO-I-05-018, A, Connecticut Yankee Atomic Power Company, Haddam Neck Plant, Supplement to Equipment Fire Inside Containment Structure at Decommissioning Reactor Site
• PNO-I-05-020, A: Supplement - Entergy'S Fitzpatrick Station Shutdown 72 Hrs; Repair Small Crack in Torus Portion of Primary Containment
• PNO-I-05-021, Connecticut Yankee Atomic Power Company, Haddam Neck Plant, Vehicle Accident Involving Spill of Low Level Contaminated Material
• PNO-I-05-022, Alert Declaration at Oyster Creek
• PNO-I-05-026, A Supplement - Hope Creek Shutdown Expected to Be Greater than 72 Hours to Repair an Inoperable Drywell to Suppression Chamber Vacuum Breaker
• PNO-I-05-028, Connecticut Yankee Atomic Power Company, Haddam Neck Report of Spent Fuel Pool Leak
• PNO-I-06-005, Millstone Unit 2, Shutdown Greater than 72 Hours - Turbine Driven Auxiliary Feedwater Pump Rotating Assembly Degradation
• PNO-I-06-009, Vermont Yankee Unusual Event Due to Indications of Fire in Electrical Switchgear Room
• PNO-I-06-010, A: Seabrook Power Station, Shutdown Greater than 72 Hours - Both Emergency Diesel Generators Inoperable Due to Problems in the Voltage Regulation Circuitry
• PNO-I-06-011, Peach Bottom, Unit 2, Loss of Containment Integrity Due to Leak in a Test Return Line
• PNO-I-06-012, Oyster Creek, Evaluation of Containment Design Function
• PNO-I-06-014, A: Calvert Cliffs Update of Preliminary Notification on Shutdown Greater than 72 Hours Due to Trip from Closure of Main Turbine Governor and Intercept Valves
• PNO-I-07-001, A: Update on Notification of Unusual Event (NOUE) Declared Due to Low Water Level in Indian Point Unit 3 Service Water Intake Bay
• PNO-I-07-002, Notification of Unusual Event (NOUE) Declared Due to Fire in Turbine Building Load Center at Peach Bottom, Unit 3
• PNO-I-07-004, A: Update - Unusual Event Declared Due to Explosion in 31 Main Power Transformer at Indian Point Unit 3
• PNO-I-07-006, A - NRC Resident Inspector - Update - Reactor Scram on Low Reactor Vessel Water Level Due to a Trip of the 'C' Reactor Feed Pump
• PNO-I-07-007, Peach Bottom Alert Declared Due to Carbon Dioxide Discharge in Diesel Generator Building
• PNO-I-07-008, Vermont Yankee, Restoration of West Cooling Towers
• PNO-I-07-009, Nine Mile Point Unit 2, Alert Declared Due to Inadvertent Discharge of Carbon Dioxide Into Electrical Switchgear Room
• PNO-I-08-001, A: Seabrook, Update - Unplanned Shutdown Greater than 72 Hrs Resulting from Automatic Reactor Trip Due to Ground Fault on 345kv Line
• PNO-I-08-002, Notification of Unusual Event for Ginna Station Due to Loss of Off-Site Land-Line Communications Due to High Winds
• PNO-I-08-003, A: Limerick, Update - Shutdown Exceeding 72 Hrs
• PNO-I-08-006, A: Vermont Yankee Nuclear Power Station, (Update) Transfer of Spent Fuel from Spent Fuel Storage Pool to Onsite Independent Spent Fuel Storage Installation (ISFSI)
• PNO-I-08-009, A: Vermont Yankee, Update - Water Leak in a Cooling Tower
• PNO-I-08-010, Hope Creek Generating Station Notification of Unusual Event Due to Indications of Internal Flooding
• PNO-I-08-011, Susquehanna, 10/27/08, Alert Declared Due to High Nitrogen Levels in Unit 2 Safety-Related Pump Room
• PNO-I-08-013, A - Update - Oyster Creek: Automatic Reactor Scram Due to Main Transformer Fault
• PNO-I-09-001, A: Exelon Generation Company, LLC, Update - Oyster Creek Unusual Event and Automatic Reactor Scram Due to Fire in M1A Main Transformer
• PNO-I-09-002, A: Oyster Creek, Update - Shutdown Greater than 72 Hours: Manual Reactor Scram Following Loss of Cooling to Main Transformer, Dated 05/04/2009
• PNO-I-09-003, A: Indian Point Unit 3 Shutdown Due to Feedpump Issues, Dated 06/08/09
• PNO-I-09-004, A: Updated - Millstone Unit 2 Reactor Trip and Shutdown Greater than 72 Hours
• PNO-I-09-005, A: Update: Oyster Creek Reactor Trip and Unusual Event Due to a Loss of Offsite Power and Shutdown Greater than 72 Hours
• PNO-I-09-006, Three Mile Island Unit 1 - Contamination Event (Update)
• PNO-I-09-007, A: Update - Millstone Unit 3 Reactor Trip and Shutdown Greater than 72 Hours
• PNO-I-10-001, A: Update - Calvert Cliffs Dual Unit Reactor Trip Due to Partial Loss of Offsite Power
• PNO-I-10-002, Loss of Normal Communications / Storm Impact Offsite at Vermont Yankee
• PNO-I-10-003, Unusual Event Declarations Due to Seismic Activity (Vermont Yankee and D.C. Cook)
• PNO-I-10-004, A: Update: Susquehanna Unit 1 Manual Scram and Shutdown Greater than 72 Hours Due to an Internal Flooding Event
• PNO-I-10-005, Susquehanna Alert Due to High Refrigerant Levels in Unit 1 Reactor Bldg
• PNO-I-10-006, Notification of Alert Declared Due to Explosion as a Result of 21 Main Transformer Failure at Indian Point, Unit 2
• PNO-I-11-001, Nine Mile Point Units 1 and 2 Strike
• PNO-I-11-002, A: Update - Salem Unit 2, Notification of Unusual Event Due to Reactor Coolant System Leak Greater than 10 Gpm and Technical Specifications Required Shutdown
• PNO-I-11-003, A, Update: Nine Mile Point Unit 2 Notification of Unusual Event Due to Reactor Coolant System Leak Greater than 10 Gpm and Plant Shutdown Greater than Three Days
• PNO-I-11-004, A Update - Nine Mile Point Unit 2 Technical Specification-Required Shutdown Due to an Increase in Unidentified Reactor Coolant System Leakage
• PNO-I-12-001, A: Update - Salem Generating Unit 1 Inadvertent Safety Injection and Notification of Unusual Event Due to Fire Alarm in Containment
• PNO-I-12-002, G: Update - Status of Union Lockout at Pilgrim Nuclear Power Station
• PNO-I-12-003, A Update: Shutdown Expected to Be Greater than 72 Hours to Repair a Leak from a Chemical Decontamination Pipe on the '1A' Reactor Recirculation Loop
• PNO-I-12-004, Limerick, Unit1, Notification of Unusual Event Declared Due to Electrical Fault in Non-Safety Related Transformer 7-18-2012
• PNO-I-12-005, Oyster Creek Reactor Shutdown and Unusual Event Due to a Loss of Offsite Power and Shutdown Greater than 72 Hours
• PNO-I-12-006, A Update - Three Mile Island Shutdown Due to Reactor Coolant System Leak
• PNO-I-12-007, Hurricane Sandy Causes Oyster Creek Alert and Shutdowns of Reactors at Nine Mile Point Unit 1, Indian Point Unit 3, and Salem Unit 1
• PNO-I-12-008, Fitzpatrick Notice of Unusual Event for Fire in Main Transformer
• PNO-I-13-001, D - Update: Pilgrim Station: Unusual Event Declared Due to Loss of Offsite Power During Winter Storm Nemo
• PNO-I-14-001, Calvert Cliffs Dual Unit Trip Following the Loss of the 21 13kV Bus
• PNO-I-14-002, A - UPDATE- Millstone Dual Unit Trip with Loss of Offsite Power
• PNO-I-14-003, Millstone, Unit 2. Shutdown Greater than 72 Hours Due to TS-Required Shutdown for the TDAFW
• PNO-I-15-001, Pilgrim: Shutdown Greater than 72 Hours Due to Reactor Scram Following a Partial Loss of Offsite Power
• PNO-I-15-002, A - Update - Indian Point Nuclear Power Station Unit No. 3: Shutdown Greater than 72 Hours Due to Reactor Trip Following 31 Main Transformer Failure
• PNO-I-22-001, Susquehanna Notification of Bankruptcy Filing by Talen Energy Supply
• PNO-I-79-001, on 790922,stable Natural Circulation Flow Was Lost.Caused by Diminishing Heat Input from Core
• PNO-I-79-005, on 791008,licensee Employee Picked Up 7.5 Mci Cs-137 Source Which Separated from Retraction Rod of Moisture Density Gauge.Employee Carried Source in Pocket for 30 Minutes,Receiving 10-15 Rems to Whole Body
• PNO-I-79-035, on 791213,NRC Contacted by Univ of MD Poison Control Ctr Re Individual Who Became Ill After Contact W/ Toxic Matl at Sharpstown,Md.Region 1 Will Continue to Review Matter to Determine Whether Radiation Was Involved
• PNO-I-79-039, on 791218,two Former Employees of Const Contractors Made Statements That Welding & Concrete Work Improperly Performed.Region 1 Conducting Investigation of Allegations
• PNO-I-79-040, on 791218,contractor Painter Fell from Ladder in Reactor Bldg & Sprained Ankle.Painter Was Treated & Released from Hosp.No Radiation or Contamination Involved
• PNO-I-79-045, b on 791228,Region 1 Requested Licensee Assure That Radiation Level of 1 Rem/Hour Under Trailer Bed Be Reduced to Less than 200 Millirem/Hour Prior to Release from Depot
• PNO-I-80-001, on 800104,isolation Condenser Isolated.Addl Insps of Containment Wall in Progress.Power Operation Will Continue Per Tech Specs for 15 Days.Precedures Require Power Be Reduced to 40% 24-h After Removing Condenser from Svc
• PNO-I-80-002, on 800223,observed Two Individuals Climb Protected Area Barrier Fence on East Side of Site. Individuals Eluded Security Force Surveillance.All Onsite Personnel Identified
• PNO-I-80-024, on 800210,facility Lost Incoming 345 Kv Transmission Line.Caused by External Power Sys Problems.Core Defueled & Spent Fuel Pool Temp Remained Relatively Constant During Event
• PNO-I-80-025A, on 800211,40.5 Ci Xe-133 Released Representing 37% Tech Spec for Instantaneous Release.On 800212 Local Emergency Declared in Auxiliary Bldg Again Due to Ion Exchanger.No Release Evident
• PNO-I-80-026, on 800125,27 & 0213,pinhole Leaks Found in Transfer Pipe from Condensate Storage Tank During Insp of Pipe.Contaminated Soil Was Removed & Pipe Replaced.Media Interest Expected
• PNO-I-80-028, on 800214,during Plant Startup W/Turbine at Rated Speed But Not Tied to Grid,Loud Noise Was Heard in Low Pressure Turbine Accompainied by Excessive Vibration. Turbine Coasted to Stop & Could Not Be Rotated
• PNO-I-80-030, on 800218,while Refueling Core W/Pool Clarity & W/Approx 1/3 Core in Place,Problems Experienced in Seating Assembly.Assembly Placed in Core Improperly & Tilted Over. Area Evacuated
• PNO-I-80-031, on 800131,licensee Identified Nine Fuel Assemblies Containing Leaking Fuel Pins.At Least Two Pins Appeared to Have Missing Segments.Cause Not Stated.Damaged Fuel Assemblies Being Replaced
• PNO-I-80-034, on 800302,two Individuals Showed Significant Whole Body Counts of Co-60.Licensee Review Indicated Exposure Occurred While Wiping Down Control Rod Blade Tool W/No Respiratory Protection
• PNO-I-80-034A, on 800302,two Individuals Were Exposed to Co-60.Deposition Calculated in Lungs & Lower Large Intestine within Allowable Quarterly & Lifetime Limits.No Future Action Anticipated
• PNO-I-80-041, on 800313,radiological Surveys of Site Grounds Uncovered Three Small Patches of Contaminated Soil Outside Controlled Area.Approx Three Tablespoons Soil Removed.Survey Continuing to Determine If Other Areas Contaminated
• PNO-I-80-042, on 800317,notified by Several Sources That Radioactive Matl Package Containing 13.8 Ci Ir-192 Source in Radiographic Device Dropped at Philadelphia Airport Was Leaking.Nonradioactive Insulating Matl Spilled Out
• PNO-I-80-043, on 800318,one Truck Full of Chlorine Rail Tank Car Derailed at Broken Switch on Licensee Property.Car Presently Located Outside Protected Area,But Is Upright, Intact, & Stable.Formulating Plans to Replace Car on Rail
• PNO-I-80-044, on 800318,call Received from Individual in Belmont,Ma Re Retrieval of Gamma Sample Charger from Trash Compactor in Winchester,Ma.Unlabelled Sealed Source Reading 11 Mrem/Hr Found.Little Radiation Exposure Occurred
• PNO-I-80-051, on 800328,licensee Reported That Core Spray Sys Sparger Insp Found 28 New Cracks.Proposed Repairs Include Installation of Clamps
• PNO-I-80-054, on 800402,plant Tripped from Full Power Due to Ground in Reactor Protective Sys.Ground Will Be Repaired & Plant Returned to Svc
• PNO-I-80-095, on 800624,Home Transportation Co tractor- Trailer Carrying Low Level Radwaste from Oswego,Ny to Barnwell,Sc Developed Air Suspension Sys & Axle Trouble on Route 81 South of Syracuse,Ny
• PNO-I-80-128, on 800909,portable Gantry Fell on Summer Work/ Study Student Working in Reactor Bldg Causing Fractured Skull & Internal Injuries.Reactor Was Shutdown.No Radiation or Contamination Was Involved
• PNO-I-80-130A, Ocean County,Nj Radiological Officer Conducted Radiation Survey of Landfill Due to Rumors of Radwaste Dumping.No Abnormal Activity Levels Were Detected
• PNO-I-80-135, on 800924,both Containment Spray Pumps Discovered in pull-to-lock Position After Tagging by Operators Per Containment Entry Procedure.Switches Returned to Automatic Position & Change to Procedure Initiated
• PNO-I-80-156, on 801021,plant Superintendent Issued Court Summons to Respond to Concerns of Rowe Nuclear Conversion Campaign.Util Also Notified That Application for Preliminary Injunction & Temporary Restraining Order Had Been Filed
• PNO-I-80-157, on 801023,well Logging Source Containing 1500 Mci Cs-137 Lost at Depth of 3,700 Ft in Franklin Township, Pa.Retrieval Unsuccessful.Hole Will Be Sealed & Placarded If Addl Recovery Attempts Fail
• PNO-I-82-042, on 820611,spent Resin Found on Ground Near Turbine Bldg.Roofs of Turbine,Reactor,Offgas & Retube Bldgs Contaminated.No Personnel or Offsite Locations Contaminated. Source of Resin Under Investigation
• PNO-I-82-042A, Re Release of Spent Resin.Site Surveys Confirmed Contamination of Turbine,Administration,Augmented Offgas & Retube Bldg Roofs.Duct Surveillance Program Established.No Offsite Release Identified
• PNO-I-82-043, on 820614,leak from Trucks Carrying U Hexafluoride for Export Under License XSNM-1913 Noticed at Truck Stop in Keysers Ridge,Md.Trucks & Liquid Surveyed.No Abnormal Radiation Levels Found
• PNO-I-82-044, on 820619,w/Unit 3 at Full Power,Hpci & Reactor Core Isolation Cooling Sys Injected Water to Core for 30 Before Safety Injection Verified Unnecessary.Caused by Degradation of Power Supply Unit
• PNO-I-82-045, on 820618,rept Submitted to Resident Inspector of Apparently Falsified Records of Composition Analysis of Sample Burnable Poison Pellets.Failure to Analyze Pellets Discovered During 820614-18 Audit
• PNO-I-82-046, on 820611,plugged Vent Filter Caused Backflow of Condensate Water & Resin Beads Into Svc Air Sys in New Radwaste Facility
• PNO-I-82-048, on 820701,unit Will Be Shut Down for 3 Days to Repair back0eakage Through Check Valve Between Common Safety Injection Header & Safety Injection Tank 11A
• PNO-I-82-049, on 820630,smoke in Control Bldg Traced to Fire in Two nonsafety-related Cable Trays Just Outside Switchgear Room.Cables Appear to Be Cut as Well as Burned. Damage Limited to Two Cable Trays.Local Police Notified
• PNO-I-82-050, on 820703,1.5 Ci Cs-137 Well Logging Source Severed from Cable Near Bottom of Well in Scottsdale,Pa. Attempts to Recover Source Unsuccessful.Licensee Plans to Cement Hole & Install Plaque Describing Source
• PNO-I-82-052, on 820715,moisture Gauge Containing 8-mCi Cs-137 Rod & 40-mCi Am-241/Be Source Run Over & Damaged by High Lift.Source Retracted Into Lead Shield at Time of Accident.Leak Test Underway.Site Roped Off
• PNO-I-82-053, on 820725,entire Shipment of New Fuel Received at Facility for First Core Load.No Discrepancies Identified
• PNO-I-82-054, on 820723,after Purging Unit 2 Containment Through Encl Bldg Filtration Sys to Unit 1 Vent Stack,Unit 2 Stack Gaseous Release Rates Exceeded Administrative Limits. Caused by Mispositioned Valve in Encl Bldg Exhaust Sys
• PNO-I-82-055, on 820727,Teamsters Union Personnel Demonstrated at Facility Access Road to Protest Delivery of New Fuel.Maint Personnel Transported Fuel to Reactor Bldg. Intervenor Press Conference & Demonstration Planned
• PNO-I-83-038A, on 830427,recirculation Loop a Riser Exam Completed.One Weld in Each of Two Risers Had Crack Indications.Data Forwarded to GE for More Detailed Analysis. Licensee Addressing Repair Method & Impact on Outage
• PNO-I-83-043, on 830430,Troxler Gauge 34-ll-B,containing Approx 40 Mci Am-241 Damaged at Const Site.Caused by Accidentally Cracking Gauge Case W/Backhoe Bucket.Wipes Taken & Analyzed.Gauge Shipped to Manufacturer for Repair
• PNO-I-83-101B, during Dec 1982,water from Irradiator Pool Pumped Onto Facility Floor During Filtering Operations. Contaminated Water Removed.Contaminated Steel Tank Removed During 850819-30
• PNO-I-84-060, on 840703,cold Shutdown Plant Condition Following Reactor Scram from 100% Power
• PNO-I-85-037, on 850516,reactor Shut Down After One of Two Diesel Generators & One of Four LPCI Pumps Found Inoperable. Cause Not Stated.Diesel Generator B Returned to Svc & LPCI Pipe Supports Repaired
• PNO-I-85-037A, on 850523,reactor Shutdown Initiated Due to Lubricating Oil Circulation Pump Motor Tripping on Diesel Generator B.Generator Declared Inoperable.Shutdown Will Be Terminated After Oil Circulation Pump Motor Replaced
• PNO-I-85-039, on 850522,several Fires Identified & Extinguished Outside Facility Structure & Inside Industrial Security Area.Caused by Apparent Arson.Investigation Initiated & Security Measures Increased
• PNO-I-85-041, on 850601,facility Reported Damaged by 850531 Tornado.Small Fire,Resulting from Damage to Transformer, Extinguished by Personnel.No Licensed Matl Disturbed.Media Interest Widespread
• PNO-I-85-042, on 850612,during Recovery Process Following Reactor Trip,Reactor Bldg Deluge Fire Protection Sys Initiated.Caused by Smoke from Hot Blistering Paint on Scram Discharge Vol Piping.Reactor Currently in Cold Shutdown
• PNO-I-85-043, on 850623,10 Indications of Unacceptable Size of Steam Generator Shell Transition Girth Weld Per ASME Section XI Found Through Ultrasonic Exam.Caused by pre-existing Flaws Present After 1983 Repairs
• PNO-I-85-044, on 850628,RCS Water Inventory Balance Indicated Unidentified Leak Rate Increased from 0.72 Gpm (Tech Spec Limit Is 1.0 Gpm) on 850627 & Steam Observed Leaking from Inlet Flange of Pressurizer Relief Valve PR-4
• PNO-I-85-045, anti-Shoreham Demonstrations Planned at Site During Wk of 850705.Demonstrators Plan Civil Disobedience of Nonviolent Nature at Gate.Task Force Established to Plan for Event
• PNO-I-85-046, on 850630,reactor Scrammed from 100% Power Due to Generator Load Reject.Caused by Generator Neutral Phase Overvoltage Condition.Test & Repairs Will Be Completed by 850707
• PNO-I-85-047A, on 850707,initiation of Startup Delayed for 36 H Due to Problems Encountered W/Installation of Structural Support on Two Suppression Pool Temp Instruments. Steam Lines Drained
• PNO-I-85-048, on 850709,maint Worker Suffered First Degree Burns to Hands & Second Degree Burns to Arms & Face While Cleaning 13 Kv Transformer Disconnect Panel.Short Circuit Caused Voltage Transient.Sys Lineup Being Restored
• PNO-I-85-049, on 850712,seven Man Picket Line Was Set Up at Plant Main Entrance to Protest Use of non-union Contractor Employed at Site on 850708.Plant Security Declared Security Alert.Local Police Providing Support for Traffic Control
• PNO-I-85-050, on 850715,reactor Tripped from Full Power When Pressure Dropped to Thermal Margin/Low Pressure Setpoint of Approx 2,130 Psi.Caused by Failure of Both Pressurizer Spray Valves to Shut
• PNO-I-85-051, on 850717,diesel Generator 1 Failed Monthly Surveillance Test Due to Woodward Governor Load Limit Setting Being Set at 3,instead of Normal Setting of 10. Caused by Possible Tampering W/Generator Setting
• PNO-I-85-051A, on 850717,diesel Generator 1 Failed Monthly Surveillance Test.Initially Attributed to Possible Tampering W/Load Limit Setting Knob.Investigation Concluded That Knob May Have Been Inadvertently Moved During Cleaning
• PNO-I-85-052, on 850722,reactor Shutdown Initiated as Result of Degradation of Emergency Svc Water Sys.Caused by HX Differential Pressure Problems.Use of Television Camera to Examine Inner Pipe Wall Planned
• PNO-I-85-053, on 850726,scram Signal Generated Due to Low Reactor Water Level.Normal Suction Valve from Suppression Pool for Loop a Opened Before Alternate Suction for Shutdown Cooling Valve Closed.Approx 3,000 Gallons Drained
• PNO-I-85-054, on 850801,irradiator Containing 22 Ci Co-60 & Other Radioactive Matl Found Underwater Due to Flooding in Stone Science Bldg.Caused by 4-inch Rainfall.Fire Dept Wants to Pump Area to Prevent Electrical Fires
• PNO-I-85-055, instrumentation Valves Mispositioned.State of Me Notified by Telcon on 850807.W/o Encl
• PNO-I-85-056, on 850808,technician Experienced Radiation Exposure by Entering Traversing in-core Probe (TIP) Room. Technician Received 1.29 Rem Dose.Caused by TIP Probe Attaching Cable That Was Recently Stuck in-core
• PNO-I-85-057, on 850812,facility Began Shutdown Due to Unusual Event.Caused by Inoperable LPCI Loop a Due to Diesel Generator E3 Out of Svc for Annual Insp & RHR-LPCI Outer Isolation Valve (MO-154A) Not Opening During Surveillance
• PNO-I-85-058, on 850813,reactor Tripped & Main Steam Line Isolation Occurred Due to Indicated Steam Line Area High Radiation.Caused by Air Introduction Into Feedwater Sys While Placing Demineralizer in Svc
• PNO-I-85-059, on 850815,unplanned 2% Power Excursion Occurred for 3-5 While Increasing Power to Permit Operational Testing of HPCI Sys.Power Ascension Program Testing Suspended Until Problem Resolved
• PNO-I-85-060, on 850819,unit Shut Down.Caused by Diesel Generator E2 Out of Svc for Annual Insp & RHR-LPCI Outer Isolation Valve MO-154A Not Opening During Surveillance. Valve Will Be Repaired & Diesel Generator Returned to Svc
• PNO-I-85-061, on 850827,Inst of Scrap Iron & Steel Reported Slightly Contaminated Steel at Unidentified Facility Near Pittsburgh,Pa.Caused by Ra-226 Contamination from Well Drilling Equipment
• PNO-I-85-062, on 850829,at 100% Power,Reactor Tripped & Safety Injection Occurred.Caused by Broken Pipe Fitting on Instrument Air Compressor Tank in Turbine Bldg.Pressurizer Pressure Restored to Normal
• PNO-I-85-064, on 850904,carbon Dioxide Fire Protection Sys Initiation Occurred,Causing Discharge of 17 Tons of Liquid Cardox Into Fuel Storage Area.Plant Evacuated & Search & Rescue Stations Established
• PNO-I-85-064A, on 850904,gas Discharged Into Diesel Generator Through Fire Suppression Sys Nozzles & Drifted to Access Bay for Four Fuel Tank Rooms & Adjacent Areas.Cause Unknown. Investigation Underway
• PNO-I-85-066, on 850907,fire Broke Out in Relay Room During CRD Surveillance Testing.Reactor Manually Tripped.Licensee Troubleshooting to Determine Cause
• PNO-I-85-066A, on 850911,licensee Implemented Maint/Test Procedure to Identify Cause of 850907 Fire in CRD Power Distribution Panels.Fire Caused by Overload of Rods on Auxiliary Power Supply,Causing Excessive Dc Current
• PNO-I-85-067, on 850923,malfunction of One Reactor Protection Sys Ac Breaker Caused Small Electrical Fire.Operator Deenergized Breaker from Feeder Bus & Fire Extinguished. Spare Breaker Installed
• PNO-I-85-067A, on 850924-25,failed Reactor Protection Sys Breaker Removed & Examined.Failure Caused by Mechanical Binding within Breaker Closure Assembly.Investigation Continuing
• PNO-I-85-068, on 850923,chemistry Technician Determined to Be Missing & Possibly Drowned After Being Sent to Obtain Environ Water Grab Sample from Discharge Canal.Search by Util & State Police Unsuccessful
• PNO-I-85-069, on 850921,fire Caused Damage to Large Portion of Lab,Resulting in Possible Loss of 75 Mci C-14. Investigation Continuing
• PNO-I-85-070, on 850925,RHR Loop B & HPCI Inoperable.Caused by Sheared Motor Mounting Bolts on Motor Operator.Piping Sys Integrity Unaffected
• PNO-I-85-071, on 850927,Hurricane Gloria Located 50 Miles East of Cape May,Nj.Reactor Facilities Located Along Coast Implementing Procedures Per Emergency Plans.Listed Plants Shutting Down.Oyster Creek Reduced Power Levels to 35%
• PNO-I-85-071A, on 850927,Hurricane Gloria Located at Northampton,Ma Moving in Northeasterly Direction.Status Downgrade to Tropical Storm Expected Early Evening on 850927.Salem Unit 1 & Millstone Complex Suffered Damage
• PNO-I-85-072, advising That Current Util Contract W/Yoh Security Guards Expires on 851001.Contingency Security Guard Force Assembled.Strike Not Expected to Affect Plant Operations
• PNO-I-85-073, on 851001,unit Placed in Cold Shutdown After Ground Fault Found in Reactor Coolant Pump Motor.Pump Motor Will Be Removed to Allow Util & GE to Determine Whether Fault Accessible
• PNO-I-85-074, wastes Containing I-125,H-3,I-131,Cl-36 & P-32 Lost.Untrained Custodial Worker Entered Labs & Emptied Wastes Into Normal Trash Compactor.Waste Removed & Disposed of in Saugus,Ma
• PNO-I-85-075, on 851006,plant Tripped.Caused by Condensation in Condenser Vacuum Sensing Line Reaching Sensor Causing Turbine Trip W/Automatic Reactor Trip.Plant in Cold Shutdown for Maint & Mod to Condenser
• PNO-I-85-076, on 851009,reactor Shut Down After Unsuccessful Attempt to Identify Cause of 1.5 Gpm Leak from Reactor Coolant Pump 11A Controlled Bleed Off Line.Caused by Cracked Weld
• PNO-I-85-077, on 851008,radiographer Received Whole Body Dose of 15.5 Rem.Caused by Failure to Retract 100-Ci Ir-192 Source to Shielded Position in Exposure Device.Radiographer Removed from Radiation Work for Remainder of Quarter
• PNO-I-85-078, on 851011,isolation Valve to Low Pressure Sys Piping Opened & Discharge of Reactor Coolant to Cleanup Demineralizer Precoat Pump Area Occurred.Cause Under Investigation.Cleanup in Progress
• PNO-I-85-078A, on 851011,reactor Coolant Spill from RWCU Sys to 779 Ft Elevation of Reactor Bldg Occurred.Caused by Lifting of 150 Psig Precoat Feed Relief Valve.Spill Cleaned & Access to Area Restored
• PNO-I-85-079, on 851016,steam Leak Identified on Drain Line from Associated Main Turbine Control Valve Header.Caused by through-wall Crack in Weld Associated W/Pipe Elbow.Power Reduced from 40% to Make Repairs
• PNO-I-85-080, on 851017,plant Tripped on Low Level Due to Loss of All Three turbine-driven Main Feed Pumps.Cause Unstated.Reactor Vessel Level Recovered by HPCI & RCIC Injection
• PNO-I-85-081, on 851022,missing 50-mCi Cs-137 Brachytherapy Source Reported.Source Possibly Removed from Premises by Laundry Servicer.State of Nj Informed
• PNO-I-85-082, on 851018,4 Kv nonsafety-related Electrical Breaker Exploded,Injuring Two Const Workers.Workers Taken to Hosp for Treatment.Vendor Representatives & OSHA Investigating Cause of Event
• PNO-I-85-083, on 851031,unmonitored Release of 1,600 Gallons Radioactive Water from Unit 1 Boric Acid Holding Tank Occurred.Caused by Personnel Error.Leak Isolated & Sewers Monitored.Unit 2 Worker Contaminated on Shoe
• PNO-I-85-084, on 851101,plant Scrammed from 100% Power Due to Loss of Instrument Air & Failure of Feed Regulator Valves to Lockup.Licensee Will Install Correct Cable to One Dc Emergency Isolation Valve
• PNO-I-85-085, on 851106,fire Protection Deluge Sys in Cable Tunnel Automatically Actuated.Smoke Smelled at Scene.Sys Isolated After 10 Minutes of Operation.Visual Insp of Cable Tunnel Revealed No Apparent Damage
• PNO-I-85-085A, on 851106,licensee Secured from Unusual Event Declared Due to Automatic Actuation of Cable Tunnel Deluge Sys.Caused by Faulty Printed Circuit Card.Ground on Nonvital Bus Damaged by Deluge Sys Corrected
• PNO-I-85-086, Nuclear Pharmacy,Inc Delivery Drivers Threatened to Call Strike During Wk of 851111 at Philadelphia Pharmacy.Licensee Mgt & Drivers Negotiating.Mgt Believes No Agreement Will Occur to Prevent Strike
• PNO-I-85-087, on 851120,reactor Scram Occurred Due to Main Generator Trip Causing Main Turbine Trip.After Scram,Main Steam Lines Isolated.Plant Brought to Cold Shutdown.Operator Manually Initiated Isolation Condenser
• PNO-I-85-088, on 851121,normal 345 Kv Offsite Power Lost as Result of Personnel Error During Surveillance of Offsite Power Source Breakers.Emergency Gas Turbine Generator Failed to Start.Shutdown Capability Lost for 5 Minutes
• PNO-I-85-089, on 851118,employee Received About 250 Rems C-14 to Skin of Hand.Caused by Spill & Inappropriate Gloves. Employee Will Be Examined by Physician.Detailed Measurements & Calculations Ongoing
• PNO-I-85-090, on 851202,Units I & II Tripped from Full & 80% Power,Respectively.Caused by Deenergization of Engineered Safeguards Svc Transformer III & Momentary Loss of Control to Reactor Feed Pumps.Transformer Being Tested
• PNO-I-85-091, on 851202,univ Inadvertently Disposed of Package Containing 2 Mci P-32 to Normal Trash.Trash Subsequently Transferred to Landfill & Buried Under Large Amount of Trash.Hazard to Public Minimal
• PNO-I-85-092, on 851205,PUC of State of PA Voted 3.2 Billion Dollar Cost Cap.Unit About 30% Complete.Restart of Const Planned in Jan 1986 Pending Board of Directors Approval.Fuel Load Planned for Early 1990
• PNO-I-85-094, on 851226,reactor Scrammed on Low Reactor Water Level.Caused by Loss of Feed Pump & Fluctuations in Feedwater Level Control Sys.Condensate & Feedwater Sys Isolated.Rcic Sys Manually Started to Control Water Level
• PNO-I-85-095, on 851230,seal Failure on RCS Makeup Pump 1A Occurred,Spilling Approx 300 Gallons of Water on Floor.Nine Personnel Slightly Contaminated.Approx 46 Ci Released from Plant.Pump Drained.Personnel Cleaned Up Room
• PNO-I-86-001, on 860109,technician Entered High Radiation Area During Treatment of Patient Undergoing Co-60 Teletherapy.Door Interlock on Treatment Room Inoperative. Exposure Estimated at No Greater than 100 Mrems
• PNO-I-86-002, on 860109,fire Protection Deluge Sys for Auxiliary Transformer Manually Actuated by Unknown Person at Local Fire Box.Caused by Intentional Act of Tampering or Harassment.Addl Security Patrols Instituted
• PNO-I-86-003, on 860115,reactor Manually Scrammed After Power Reduction to 70%.Caused When Oil Observed Spraying from Main Transformer.Oil Spray Caused by Excessive Heat Buildup.Transformer Will Be Inspected & Repaired
• PNO-I-86-004, on 860117,nine Plant Workers Contaminated w/short-lived Rb-88 & Cs-138.Caused by Buildup of Gases in Offgas Bldg After Offgas Sys Shut Down for Maint.Slight Radioactivity Detected at Bldg Vent
• PNO-I-86-005, on 860118,licensee Conducted Normal Reactor Shutdown After Discovering Potential for Overstressing Containment Penetration in Event of Postulated Emergency Condenser Steam Line Break.Evaluation Continuing
• PNO-I-86-006, on 860123,facility Achieved Initial Criticality.Criticality Boron Concentration Was 1,591 Ppm, 32 Ppm Above Predicted Concentration & within Tech Spec Max Margin of 100 Ppm
• PNO-I-86-007, on 860123,bomb-like Device Discovered in Containment Encl Ventilation Fan Room.Both Plant & State of Nh Police Notified.Plant Police Conducting Investigation.No Bomb Threat Received
• PNO-I-86-008, on 860124,unit Scrammed from 95% Power After Diesel Generator E-2 Tripped When Loaded W/Certain Emergency Buses.Caused by Mechanical Failure of Scavenging Air Blower. Addl Damage Caused by Debris
• PNO-I-86-009, on 860127,reactor Shut Down to Repair Leaking Expansion Bellows on Feedwater Heater Extraction Steam Line. Cause of Leakage Not Stated.Outage Should Last 1 Wk
• PNO-I-86-009A, on 860204,plant Restarted Following Outage to Replace Turbine Extraction Steam Bellows Inside Main Condenser
• PNO-I-86-010, on 860123,Mo-99-Tc-99m Generator Picked Up by Federal Express for Shipment to Hollywood,Fl.Generator Lost in Transit.Federal Express Presently Searching.Safety Hazard Possible If Package Opened & Contents Released
• PNO-I-86-011, on 860201,plant Placed in Commercial Operation. Plant Operating at 99.5% Power.Util Received License to Load Fuel & Conduct Low Power Testing on 841026 & full-power License on 850808
• PNO-I-86-012, on 860206,during Routine Closure Surveillance, Inboard MSIV Failed to Close.Main Steam Lines Isolated.One Inboard MSIV Remains Open.Investigation & Repair of Valve Underway
• PNO-I-86-013, on 860207,150 Rads of Co-60 Administered to Wrong Patient.Patient Treatment Suspended Pending Results of Internal Investigation
• PNO-I-86-013A, on 860207,wrong Patient Received Prescribed Dose of 150 Rads After Kidney Transplant.Caused When Clerk Entered Order for Wrong Kidney Patient.Proper Patient Treated.Required Notifications Made
• PNO-I-86-014, on 860208,squib Valve a Failed to Open When Sys Actuated.Caused by Firing Circuit Being Miswired. Wiring Error Alo Exists in Squib B.Reactor Currently Defueled as Part of Extended Outage for Piping Replacement
• PNO-I-86-015, on 860216,water in Condenser Pumped to Condensate Storage Tank,Resulting in Overflow.Caused by Blown Fuse in Main Condenser Hotwell Level Control Sys.Water Drained by Yard Drain Sys & Released to River
• PNO-I-86-017, on 860220,CPN Corp Model MC-2 Moisture/Density Gauge w/10-mCi Cs-137 & 50-mCi Am-241 Sources Reported Stolen.Gauge Stored in Locked Case in Locked Wooden Box Nailed to Floor of Locked Trailer.Locks Broken
• PNO-I-86-018, on 860214,83-mCi Cs-137 Calibr Source Discovered Missing.Theft Suspected Due to Lock on Source Holder Being Changed.Investigation in Progress