Pages that link to "PNO-III-87-001, on 870102,three Small Steam Leaks Discovered on Two of Four Main Steam Lines.During Power Reduction for Shutdown,Main Turbine Tripped on 18% Power.Cause Under Investigation.Instrument Lines Will Be Temporarily Plugged"
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The following pages link to PNO-III-87-001, on 870102,three Small Steam Leaks Discovered on Two of Four Main Steam Lines.During Power Reduction for Shutdown,Main Turbine Tripped on 18% Power.Cause Under Investigation.Instrument Lines Will Be Temporarily Plugged:
Displayed 50 items.
- PNO-III-85-098, on 851117,between 17,000 & 35,000 Gallons of Radioactive Water Released from Ruptured Seam in Condensate Storage Tank.Water Radioactivity Less than 0.4% of Regulatory Limit for Offsite Release (← links)
- PNO-III-85-083, on 850917,leak Observed in East Steam Bypass Line.Transient Power Spike Observed While Attempting to Isolate Line & Open Valve.Cause of Transient Not Determined. Cracked Piping Around Valve Under Investigation (← links)
- PNO-III-85-077, on 850904,leak Rate Test Connection Valve Installed on 850620 in Containment Sampling Sys Found Open & Attached Line Uncapped,Due to Unrevised Containment Valve Lineup Procedure.Valve Closed (← links)
- PNO-III-88-022, on 880318,received Bomb Threat Possibly Originating on Site.Site Access Restricted to Essential Personnel & Search of Facility Begun.No Explosive Devices Found & No Explosions Occurred.Investigation Continuing (← links)
- PNO-III-88-014, on 880226,portion of Automatic Start Circuitry for Plant Four Diesel Generators Not Fully Tested. Unusual Event Classification Terminated on 880227 Following Manual Reactor Scram.Maint & Testing Outage Begun (← links)
- PNO-III-86-037, on 860418,util Announced Extension of Outage to mid-Jul 1986.Licensee Review of Reevaluation of Design Work Performed on Concrete Embedments & Pipe Supports Will Be Completed by 860501 (← links)
- PNO-III-86-004, RHR Pump Motor Removed Offsite for Testing & Insp Following 851125 Failure Due to Mfg Defect.Pump Replaced.Generic Implications Under Investigation (← links)
- PNO-III-86-024, on 860317,backup Reactor Protection Sys Trip Breaker Failed to Trip During Bus a Transfer from Primary Electrical Supply.Caused by Repeated Testing.Manual Scram Inserted.Investigation Underway (← links)
- PNO-III-85-095, on 851113,unusual Noise & Vibration Observed in Emergency Diesel Generator.Operator Manually Tripped Diesel.Preliminary Evaluation Indicates Damage to Connecting Rod Bearing for Upper Crankshaft & Upper Piston Skirt (← links)
- PNO-III-85-076, on 850825,recirculation Pump B Problem Resulted in Brief Power Increase from 2.9 to 8.8%.Reactor Operators Tripped Pump After Failing to Reduce Pump Speed. Testing Disclosed No Problems W/Speed Control Circuitry (← links)
- PNO-III-85-070, on 850806,Monroe County Board of Commissioners Requested Full Investigation of Operational Procedures & Employee Credentials Due to 850702 Unplanned Criticality Not Reported to NRC Until 850715 (← links)
- PNO-III-85-066, on 850729,low Svc Water Flow Alarm Received During Surveillance Testing of Div I Diesel Generator. Generator Manually Tripped.Caused by Closed Bypass Valve in Line Returning Water to Reservoir.Investigation Underway (← links)
- PNO-III-85-058, on 850702,reactor Brought to Criticality W/O Shift Supervisor Realizing Incident.Caused by Reactor Operator Failing to Follow Proper Procedures for Moving Control Rods in Full Out Position.Incident Being Reviewed (← links)
- PNO-III-85-055, on 850709,reactor Tripped on Low Water Level. Caused by Operator Inattentiveness to Level Indicator.No ECCS Injection Occurred (← links)
- PNO-III-80-054, on 800318,licensee Informed Region 3 That Channel 7 News in Detroit,Mi Plans to Televise 800321 Interview W/Site Contractor Employees Re Allegations of Improper Receipt Insp of Small Bore Pipe (← links)
- PNO-III-80-032, on 800219,correspondents from ABC 20/20 Program Will Interview Regional Director & Other Members Re NRC Investigation Into Allegations of Falsification of Qualification Records of Personnel Doing Design Work (← links)
- PNO-III-88-071, on 880809,brick Thrown Through Windshield of Contractor Vehicle & Driver Assaulted by Picketers.Incident Being Investigated by Monroe County Sheriff Dept.State Will Be Informed (← links)
- PNO-III-88-065, on 880723,unidentified Drywell Leakage Forces Shutdown.Leakage Believed Coming from RCIC Inboard Steam Isolation Valve & Two Valves in Reactor Water Cleanup Sys. Repairs,Maint & Insp Activities Planned (← links)
- PNO-III-88-064, on 880713,pressure Transient in RWCU Sys Caused Compression Fitting on Instrument Line to Separate, Releasing Water & Steam Contaminated W/Radioactivity in Reactor Bldg.Caused by Failed Fitting.Damaged Line Isolated (← links)
- PNO-III-88-019, on 880306,weapon Incident Involving Security Guard Occurred When During Verbal Confrontation One Security Guard Pointed Handgun at Second Guard.Individual Suspended & State of Mi Notified (← links)
- PNO-III-94-078, on 941002,planned anti-nuclear Demonstration Held on Public Highways at Road Intersections Leading to Access Roads & owner-controlled Area Gates to Plant.Media Covered Event.State of Mi Informed (← links)
- PNO-III-88-003, on 880115,regional Administrator Authorized Licensee to Exceed 75% for First Time & Proceed Up to 100% Power.On 880116,licensee Began Increasing Power But Encountered Vibration Problems on Two Main Steam Lines (← links)
- PNO-III-88-002, on 880111,reactor Tripped & HPCI & RCIC Sys Triggered Automatically Due to Trip of One Reactor Feedwater Pump.Caused by Feedwater Control Sys Power Supply Failure. Power Supply Replaced (← links)
- PNO-III-98-055, on 981113,licensee Shut Unit Down to Repair Steam Leak from Reactor Feedwater Check Valve.Valve Is SR & Would Provide Containment Isolation Function Under Accident Conditions (← links)
- PNO-III-88-001, on 871231,reactor Scrammed from 75% Power as Result of High Water Level in Reactor,Caused by Personnel Error During Installation of Auxiliary Computer Intended to Monitor Feedwater Heater Temp (← links)
- PNO-III-86-008, on 860125,roving Fire Watch Discovered Burning Insulation on Exhaust Line of Emergency Diesel Generator 13.Caused by Oil Soaking Insulation During Prior Disassembly & Oil Flushing.Fire Extinguished.Leak Repaired (← links)
- PNO-III-88-052, on 880528,water Hammer in RWCU Sys Damaged Fitting on 5/8 Inch Instrument Line & Caused Leak of Steam & Water Into RWCU Sys Pump Room.Caused by Water Hammer. Instrument Line Repaired (← links)
- PNO-III-87-048, on 870402,util Informed Region III That Some Licensed Operators May Not Have Attended All of Required Lectures of Requalification Program.Unit Will Not Restart, Pending Review of Program (← links)
- PNO-III-86-077, on 860806,fire & Electric Overload Alarm Received.Fire Located in Cubicle Containing Power Supply Breaker.Cause Unknown.Fire Extinguished.Power Supply Breaker & Affected Motor Control Ctr Inspected (← links)
- PNO-III-94-010, on 940216,licensee Announced Plan to Release Up to 1.5 Million Gals of Slightly Contaminated Water from Plant.Water Associated w/931225 Turbine Accident at Plant (← links)
- PNO-III-94-090, on 941219,reactor Operators Began Startup of Plant 2 Reactor Following Recovery from Turbine Generator Failure & Fire on 931225 (← links)
- PNO-III-86-067, on 860708,Monroe County Board of Commissioners Adopted Resolution,By 5 to 3 Vote,Requesting Congressman Dingell to Hold Hearings on Adequacy of GE Mark 1 Containment (← links)
- ML20207J065 (redirect page) (← links)
- PNO-III-87-001 (redirect page) (← links)
- PNO-III-86-069, on 860715,full Scram & ECCS Actuation Occurred During Heatup of Reactor Pressure Vessel.Approx 10 Gallons of Water Injected Into Vessel.Caused by Pressure Spike from Flow Perturbation.State of Mi Informed (← links)
- PNO-III-86-097, on 860912,authorization Granted to Increase Power Level to 20%.Power Escalation Expected This Wk.Power Increase Previously Recommended for 860910 (← links)
- PNO-III-98-015, on 980201,reactor Scrammed from 96% Power Following Trip of Main Turbine.Main Turbine Trip Resulted from Main Generator Load Rejection Protective Signal. Investigation Continuing (← links)
- PNO-III-87-055, on 870410-11,licensee Identified Several Steam Leaks in Main Steam Line & HPCI & RCIC Sys Declared Inoperable.Caused by Cracked Welds & Blown Fuse, Respectively.Reactor Shut Down for Steam Line Repairs (← links)
- PNO-III-87-075, on 870521,licensee Shut Unit Down from 7% Power to Repair Valve Packing Leak Detected on 870520 in Rwcu.Source of Leak Determined & Valve Opened & Closed to Stop Leakage Through Packing (← links)
- PNO-III-86-088, on 860902,normal Plant Shutdown Began for Repair of Malfunctioning torus-to-reactor Bldg Vacuum Breaker Isolation Valve.Repair Effort Expected to Take More than 48 H.Addl Maint Will Be Conducted During Shutdown (← links)
- PNO-III-86-136, on 861117,283,000 Gallons of Water Lost from Condensate Storage Tank Following Maint on Valve.Caused by Breaking of Weld to HPCI Test Return Pipe.Radwaste Spill Occurred During Transfer of Spilled Water (← links)
- PNO-III-87-001, A:on 870102,licensee Discovered Three Small Steam Leaks on Two of Four Main Steam Lines & on 870105, Following Repairs & Return of Steam Lines to Svc,Cracked Weld on Instrument Line/Valve Connection Found (redirect page) (← links)
- PNO-III-87-103, on 870727,licensee Reduced Power to Approx 2% to Repair Feedwater Check Valve Which Was Leaking. Unusual Event Under Licensee Emergency Plan Was Declared,Due to Required Shutdown (← links)
- PNO-III-86-148, on 861217,guns,knives,ammunition & Marijuana Found in Possession of Truck Driver Seeking Entrance to Protected Area.Driver Denied Access & Arrested by State Police.Driver Involved W/Paramilitary Organization for Hire (← links)
- PNO-III-90-026, on 900410,reactor Scrammed When Inboard MSIVs Began to Drift Shut Because of Loss of Pressure in Containment Pneumatic Nitrogen Sys (← links)
- PNO-III-89-028, on 890417,fire Occurred in Ofc Switchgear in Room in Bldg within Plant Protected Area.Fire Extinguished. Local Fire Marshall Investigating Incident & Extent of Damage (← links)
- PNO-III-89-063, on 890922,picketers Protested Licensee Use of Nonbldg Trade Union Personnel to Perform Insp & Maint Work During Outage by Disrupting Outage Contractor Traffic from Entering Gate.Two Arrests Made by County Sheriff Dept (← links)
- PNO-III-87-130, on 871006,loaded .25 Caliber Automatic Pistol Found During Search of tractor-trailer Delivering Empty Radwaste Container to Plant Protected Area.Individual Denied Site Access & Detained Until Arrival of Police (← links)
- PNO-III-87-133, on 871009,licensee Authorized to Resume Operations Following Maint Outage.Limitation of 50% Power Remains in Effect.Licensee Will Provide Monthly Repts on Status of Preventive Maint Program & Improvement Plans (← links)
- PNO-III-87-116A, updates Discovery of Turbine Bldg Pipe Support Damage.Addl Damage to Feedwater Heater Emergency Drain Lines Identified.Cause Undetermined.Damage Under Evaluation & Repair Plans Developed (← links)