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| Issue date | Title | Topic | |
|---|---|---|---|
| PNO-III-94-006, on 940121,licensee Commenced Shutdown of Unit 2 to Repair Steam Leak That Was Discovered in Vicinity of SG 1.Leak Was Repaired 940125 & Plant Has Commenced Startup | 25 January 1994 | PNO-III-94-006:on 940121,licensee Commenced Shutdown of Unit 2 to Repair Steam Leak That Was Discovered in Vicinity of SG 1.Leak Was Repaired 940125 & Plant Has Commenced Startup | |
| PNO-III-92-045, on 920908,unit Shut Down Due to High Generator Vibrations.Cause Undetermined.Licensee Will Remove & Inspect Generator Rotor | 9 September 1992 | PNO-III-92-045:on 920908,unit Shut Down Due to High Generator Vibrations.Cause Undetermined.Licensee Will Remove & Inspect Generator Rotor | |
| PNO-III-90-049, on 900713,one Person Killed & Three Others Injured When Fatally Injured Worker Touched Live Contact in 4-kV Cabinet.Licensee Declared Unusual Event Under Emergency Plan & Subsequently Terminated | 13 July 1990 | PNO-III-90-049:on 900713,one Person Killed & Three Others Injured When Fatally Injured Worker Touched Live Contact in 4-kV Cabinet.Licensee Declared Unusual Event Under Emergency Plan & Subsequently Terminated | |
| PNO-III-90-033, on 900524,licensee Declared Emergency Plan After 765KV Switchyard Breaker Opened Unexpectedly & Control Room Received Rept of Fire & Explosion.Caused by Burning Oil from Crosstie Breaker L.Unit 1 Reduced Power to 62% | 24 May 1990 | PNO-III-90-033:on 900524,licensee Declared Emergency Plan After 765KV Switchyard Breaker Opened Unexpectedly & Control Room Received Rept of Fire & Explosion.Caused by Burning Oil from Crosstie Breaker L.Unit 1 Reduced Power to 62% | |
| PNO-III-87-113A, updates Util Evaluation of Defective & Incorrectly Installed Bolts in Facility Containment Access Area.Caused by Use of Improper Cutting & Welding Procedure. Evaluation Continuing | 3 September 1987 | PNO-III-87-113A:updates Util Evaluation of Defective & Incorrectly Installed Bolts in Facility Containment Access Area.Caused by Use of Improper Cutting & Welding Procedure. Evaluation Continuing | |
| PNO-III-87-100, on 870723,unusual Event Declared When Contractor Employee Wearing Slightly Contaminated Clothing Taken to Local Hosp.When Clothing Removed,Surveys of Individual & Hosp Showed No Contamination | 24 July 1987 | PNO-III-87-100:on 870723,unusual Event Declared When Contractor Employee Wearing Slightly Contaminated Clothing Taken to Local Hosp.When Clothing Removed,Surveys of Individual & Hosp Showed No Contamination | |
| PNO-III-87-098, on 870714,undervoltage on Reactor Coolant Pump Bus Occurred.Caused by Tripping of Unit from 80% Power Due to Voltage Variation.Licensee Decided to Shut Down Unit to Repair Minor Leaks in Reactor Cooling Sys | 15 July 1987 | PNO-III-87-098:on 870714,undervoltage on Reactor Coolant Pump Bus Occurred.Caused by Tripping of Unit from 80% Power Due to Voltage Variation.Licensee Decided to Shut Down Unit to Repair Minor Leaks in Reactor Cooling Sys | |
| PNO-III-87-081, on 870610,earthquake Measuring 5.0 on Richter Scale Occurred Near Lawrenceville,Il.Unusual Events Declared by Six Power Stations But No Damage Observed.Ground Motion Felt at Five Other Plants | 11 June 1987 | PNO-III-87-081:on 870610,earthquake Measuring 5.0 on Richter Scale Occurred Near Lawrenceville,Il.Unusual Events Declared by Six Power Stations But No Damage Observed.Ground Motion Felt at Five Other Plants | Earthquake |
| PNO-III-87-032, on 870302,slow,steady Increase in Primary to Secondary Steam Generator Tube Leakage Monitored.On 870303, Leak Estimated at 0.2 Gpm & Unit Taken Out of Svc.Tube Will Be Repaired & Surveillance & Maint Program Implemented | 4 March 1987 | PNO-III-87-032:on 870302,slow,steady Increase in Primary to Secondary Steam Generator Tube Leakage Monitored.On 870303, Leak Estimated at 0.2 Gpm & Unit Taken Out of Svc.Tube Will Be Repaired & Surveillance & Maint Program Implemented | |
| PNO-III-86-130, on 861105,during QA Audit of Contractor, Access Badges Removed Due to Inadequacies W/Screening Program.Employees Not Permitted to Return Until Screening Performed by Independent Organization | 6 November 1986 | PNO-III-86-130:on 861105,during QA Audit of Contractor, Access Badges Removed Due to Inadequacies W/Screening Program.Employees Not Permitted to Return Until Screening Performed by Independent Organization | |
| PNO-III-86-096, on 860911,bomb Threat Received at Telephone Switchboard,Stating That Bomb Placed in Training Ctr.Ctr Evacuated & Facility Searched.No Bomb Found.Nrc Info Assessment Team Notified | 12 September 1986 | PNO-III-86-096:on 860911,bomb Threat Received at Telephone Switchboard,Stating That Bomb Placed in Training Ctr.Ctr Evacuated & Facility Searched.No Bomb Found.Nrc Info Assessment Team Notified | |
| PNO-III-86-094, on 860910,federal Grand Jury in State of Mi Western District Indicted Util & Jg Del Percio W/Violations of NRC Fire Protection Requirements Occurring from Mar 1981 - Apr 1982 | 10 September 1986 | PNO-III-86-094:on 860910,federal Grand Jury in State of Mi Western District Indicted Util & Jg Del Percio W/Violations of NRC Fire Protection Requirements Occurring from Mar 1981 - Apr 1982 | |
| PNO-III-86-072, on 860722,reactor Tripped While Operating at 90% Power.Caused by Workman Error While Attempting to Calibr Stator Cooling Water Pressure Switches.Util Will Proceed to Cold Shutdown for Repairs & Perform Snubber Surveillances | 23 July 1986 | PNO-III-86-072:on 860722,reactor Tripped While Operating at 90% Power.Caused by Workman Error While Attempting to Calibr Stator Cooling Water Pressure Switches.Util Will Proceed to Cold Shutdown for Repairs & Perform Snubber Surveillances | |
| PNO-III-86-050, on 860528,at 90% Power,Unit Tripped Following Main Turbine Trip on Overspeed.Caused by Small Leakage in Pressurizer Spray Valve & Letdown Valve.Failure of intermediate-range Detector Under Investigation | 28 May 1986 | PNO-III-86-050:on 860528,at 90% Power,Unit Tripped Following Main Turbine Trip on Overspeed.Caused by Small Leakage in Pressurizer Spray Valve & Letdown Valve.Failure of intermediate-range Detector Under Investigation | |
| PNO-III-86-010, on 860201,auxiliary Transformer 2DC on Fire at Bushing Atop Unit.Caused by Trip from 80% Power Due to Main Electrical Fault on Transformer.Repairs & Bus Alignments Evaluated to Facilitate Restart | 3 February 1986 | PNO-III-86-010:on 860201,auxiliary Transformer 2DC on Fire at Bushing Atop Unit.Caused by Trip from 80% Power Due to Main Electrical Fault on Transformer.Repairs & Bus Alignments Evaluated to Facilitate Restart | |
| PNO-III-85-099, on 851125,primary Coolant Sys Leaks Noted After Reactor Trip.Most Repairs Completed in Hot Standby. Remaining Leaks,In Two Safety Injection Check Valves & Gasket Flange for Coolant Pump,Scheduled for Cold Repair | 27 November 1985 | PNO-III-85-099:on 851125,primary Coolant Sys Leaks Noted After Reactor Trip.Most Repairs Completed in Hot Standby. Remaining Leaks,In Two Safety Injection Check Valves & Gasket Flange for Coolant Pump,Scheduled for Cold Repair | |
| PNO-III-85-093C, on 851106,licensee Submitted Request for Restart Concurrence,Per 851030 Confirmatory Action Ltr.Insp & Testing of Reactor Trip Breakers Completed.Failed Breakers Shipped to Vendors for Testing & Evaluation | 7 November 1985 | PNO-III-85-093C:on 851106,licensee Submitted Request for Restart Concurrence,Per 851030 Confirmatory Action Ltr.Insp & Testing of Reactor Trip Breakers Completed.Failed Breakers Shipped to Vendors for Testing & Evaluation | |
| PNO-III-85-093B, on 851029,reactor Trip Breaker & Associated Undervoltage Trip Actuating Device Failed.Breaker Mods Expected to Be Completed on 851105.Elements of Confirmatory Action Ltr Met Except for Cause of Device Failure | 4 November 1985 | PNO-III-85-093B:on 851029,reactor Trip Breaker & Associated Undervoltage Trip Actuating Device Failed.Breaker Mods Expected to Be Completed on 851105.Elements of Confirmatory Action Ltr Met Except for Cause of Device Failure | |
| PNO-III-85-093, on 851029,reactor Tripped on Spurious Low Flow Signal in Primary Sys.Unit Will Remain Shut Down Until Licensee Investigation Completed & NRC Concurs W/Findings. Special Insp Team Dispatched.State of Mi Will Be Notified | 29 October 1985 | PNO-III-85-093:on 851029,reactor Tripped on Spurious Low Flow Signal in Primary Sys.Unit Will Remain Shut Down Until Licensee Investigation Completed & NRC Concurs W/Findings. Special Insp Team Dispatched.State of Mi Will Be Notified | |
| PNO-III-85-059, on 850716,facility Shut Down to Investigate Increasing primary-to-secondary Sys Leakage in Two Steam Generators.Cause Not Stated.Eddy Current Testing Will Be Performed to Locate & Plug Leaking Tubes | 16 July 1985 | PNO-III-85-059:on 850716,facility Shut Down to Investigate Increasing primary-to-secondary Sys Leakage in Two Steam Generators.Cause Not Stated.Eddy Current Testing Will Be Performed to Locate & Plug Leaking Tubes | |
| PNO-III-82-076A, on 820804,stuck Fuel Assembly Freed & Transferred W/O Incident to Spent Fuel Storage Pool.No Release of Radioactivity Evident.Assembly Placed in Normal Storage Location in Spent Fuel Storage | 5 August 1982 | PNO-III-82-076A:on 820804,stuck Fuel Assembly Freed & Transferred W/O Incident to Spent Fuel Storage Pool.No Release of Radioactivity Evident.Assembly Placed in Normal Storage Location in Spent Fuel Storage | |
| PNO-III-82-076, on 820804,fuel Assembly Became Wedged in Device Used to Move Assemblies from Vertical to Horizontal Position for Movement Through Fuel Transfer Canal.Caused by Tilting Device in Horizontal Position Instead of Vertical | 4 August 1982 | PNO-III-82-076:on 820804,fuel Assembly Became Wedged in Device Used to Move Assemblies from Vertical to Horizontal Position for Movement Through Fuel Transfer Canal.Caused by Tilting Device in Horizontal Position Instead of Vertical | Fuel cladding |
| PNO-III-82-073, on 820731,unit Shut Down After Tube Leak Rate of 0.17 Gpm Determined in Steam Generator 2.Licensee Estimates Unit Will Be Down for Several Days for Testing & Leak Location Activities | 3 August 1982 | PNO-III-82-073:on 820731,unit Shut Down After Tube Leak Rate of 0.17 Gpm Determined in Steam Generator 2.Licensee Estimates Unit Will Be Down for Several Days for Testing & Leak Location Activities | |
| ML20216J707 | 13 November 1978 | PNO-78-192:on 781109,Unit 2 Shutdown for Scheduled Maint & Was in Cold Shutdown at Time of fire.Carbon-dioxide & Dry Chemical Fire Extinguishers,Water to Control & Finally Extinguish Fire.State of Mi Notified | |
| ML20248L083 | 13 March 1978 | PNO-78-044:on 780310,plant Achieved Initial Criticality.Rod Positions & Boron Concentration at Initial Criticality Were in Very Close Agreement W/Predicted Values.Unit 2 Currently in Low Power Physics Testing | |
| ML20207G591 | 18 November 1977 | PNO-77-205:on 771118,DC Cook Unit 1 Reactor Initiated Shutdown in Compliance with Order Issued by NRR to Imeco & Impco.Suspension of Power Operation of Facility Will Continue Until Qualified Connectors Installed | |
| ML20126D190 | 12 August 1977 | PNO-77-143:Pacific Pump Co Supplied Facilities W/Production Lot of 40 Pumps Mfg Using Shafts Made of Inferior Matl. Cause Unstated.All Utils W/Pumps Were Notified.Nrc Headquarters Notified on 770812 | |
| ML20151U706 | 31 March 1977 | PNO-77-049:on 770330,allegation of Falsification of QC Records Occurred.Region III Personnel Have Appointment to Meet with Individual on 770407.Individual Unavailable Earlier,Due to Move of Residence | Nondestructive Examination |
| ML20249B900 | 20 September 1976 | PNO-76-158:on 760917,util Informed Region III by Telephone That an Industrial Accident Has Resulted in Death by Asphyxiation of One Construction Worker & Hospitalization of Two Other Workers | Fatality |
| ML20249B306 | 11 May 1976 | PNO-76-085:on 760510,auxiliary Bldg Evacuated as Precautionary Measure for Approx 1 H Due to Leakage of Rc Water from Rc Filter Drain Valve.Region 3 Radiation Protection Specialist Conducting Routine Insp | |
| ML20236W949 | 4 December 1975 | PN-75-144:on 751204,oil in Oil Bath Air Cleaner for Diesel Generator Cd Was Accidentally Ignited.Plant Personnel Extinguished Fire Before Fire Department Arrived.No Injuries to Personnel & No Damage to Facility Resulted |