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| Issue date | Title | Topic | |
|---|---|---|---|
| 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-87-060A, on 870427,reactor Entered 72 H Tech Spec Action Statement.Caused by Inoperable Shutdown Condenser Inlet Valve 1B.Licensee Plans to Reduce Power from 98% on 870429 & Complete Permanent Shutdown on 870430 | 28 April 1987 | PNO-III-87-060A:on 870427,reactor Entered 72 H Tech Spec Action Statement.Caused by Inoperable Shutdown Condenser Inlet Valve 1B.Licensee Plans to Reduce Power from 98% on 870429 & Complete Permanent Shutdown on 870430 | |
| PNO-III-87-060, on 870424,util Authorized Permanent Shutdown of Plant Due to Economic Reasons.Plant Will Be Put in Cold Shutdown Mode within Next 2 Wks.No Organizational Changes Will Be Made But Plant Staff Will Be Reduced | 27 April 1987 | PNO-III-87-060:on 870424,util Authorized Permanent Shutdown of Plant Due to Economic Reasons.Plant Will Be Put in Cold Shutdown Mode within Next 2 Wks.No Organizational Changes Will Be Made But Plant Staff Will Be Reduced | |
| PNO-III-86-071, on 860719,lightning Struck Main Transmission Line Immediately Adjacent to Plant,Resulting in Loss of All Offsite Power.Both Diesel Generators Automatically Started, Picking Up All Vital Loads as Designed.Power Restored | 21 July 1986 | PNO-III-86-071:on 860719,lightning Struck Main Transmission Line Immediately Adjacent to Plant,Resulting in Loss of All Offsite Power.Both Diesel Generators Automatically Started, Picking Up All Vital Loads as Designed.Power Restored | |
| PNO-III-86-070, on 860716,small Drip Wise Leak Observed on 8- Inch Suction Line to DHR Pump,Following Reactor Trip. Insulation Removed.Leak Due to Two Cracks Immediately Adjacent to Test Plug Weld | 18 July 1986 | PNO-III-86-070:on 860716,small Drip Wise Leak Observed on 8- Inch Suction Line to DHR Pump,Following Reactor Trip. Insulation Removed.Leak Due to Two Cracks Immediately Adjacent to Test Plug Weld | |
| PNO-III-86-061, on 860622,reactor Tripped as Result of Signal Showing MSIV Not Fully Open.Caused by Failed Relay in MSIV Circuitry Giving Incorrect Indication.Relay Replaced & Tested | 23 June 1986 | PNO-III-86-061:on 860622,reactor Tripped as Result of Signal Showing MSIV Not Fully Open.Caused by Failed Relay in MSIV Circuitry Giving Incorrect Indication.Relay Replaced & Tested | Reactor Vessel Water Level |
| PNO-III-86-043, on 860510,containment Smoke Alarm Received in Control Room Re Smoke in Forced Circulating Pump Room 1B. Caused by Oil Used on Bypass Valve Dripping on Heated Pipe Insulation.Insulation Replaced | 12 May 1986 | PNO-III-86-043:on 860510,containment Smoke Alarm Received in Control Room Re Smoke in Forced Circulating Pump Room 1B. Caused by Oil Used on Bypass Valve Dripping on Heated Pipe Insulation.Insulation Replaced | |
| PNO-III-86-018, on 860307,reactor Automatically Tripped While in Process of Shutting Down for Scheduled 5-wk Maint & Refueling Outage.Caused When One Rod Failed to Fully Insert. Rod Manually Inserted.Breaker B Replaced | 10 March 1986 | PNO-III-86-018:on 860307,reactor Automatically Tripped While in Process of Shutting Down for Scheduled 5-wk Maint & Refueling Outage.Caused When One Rod Failed to Fully Insert. Rod Manually Inserted.Breaker B Replaced | |
| PNO-III-86-007, on 860125,unit Manually Shut Down.Caused by Excessive Seal Leakage on CRD 13.Unit Taken to Cold Shutdown to Permit Removal & Replacement of CRD Mechanism.Restart of Unit Expected by 860131 | 27 January 1986 | PNO-III-86-007:on 860125,unit Manually Shut Down.Caused by Excessive Seal Leakage on CRD 13.Unit Taken to Cold Shutdown to Permit Removal & Replacement of CRD Mechanism.Restart of Unit Expected by 860131 | Hydrostatic |
| PNO-III-85-092A, on 851023,unit Shut Down Due to High Neutron Flux During Startup.Insp Team Concluded That Reactor Sys Equipment Functioned Acceptably.Electronic Circuit Cards Replaced | 24 October 1985 | PNO-III-85-092A:on 851023,unit Shut Down Due to High Neutron Flux During Startup.Insp Team Concluded That Reactor Sys Equipment Functioned Acceptably.Electronic Circuit Cards Replaced | |
| PNO-III-85-092, on 851023,reactor Failed to Trip Automatically Following High Flux Alarm.Cause Undetermined. Reactor Shut Down Pending Results of Investigation | 23 October 1985 | PNO-III-85-092:on 851023,reactor Failed to Trip Automatically Following High Flux Alarm.Cause Undetermined. Reactor Shut Down Pending Results of Investigation | |
| PNO-III-85-091, on 851022,loss of Offsite Power Occurred Due to Inadvertent Opening of Circuit Breaker in Switchyard. Caused by Personnel Winterizing Equipment.Accumulator Repressurized & Circuit Breaker Closed | 22 October 1985 | PNO-III-85-091:on 851022,loss of Offsite Power Occurred Due to Inadvertent Opening of Circuit Breaker in Switchyard. Caused by Personnel Winterizing Equipment.Accumulator Repressurized & Circuit Breaker Closed | |
| PNO-III-82-064, on 820702,radioactive Water from Condensate Water Sys Escaped Through Failed Gasket Ground Glass Sight in Condensate Demineralizer Room.Water Flowed Into Turbine Bldg,Sump & to Outside Environ.Investigation Underway | 2 July 1982 | PNO-III-82-064:on 820702,radioactive Water from Condensate Water Sys Escaped Through Failed Gasket Ground Glass Sight in Condensate Demineralizer Room.Water Flowed Into Turbine Bldg,Sump & to Outside Environ.Investigation Underway | |
| ML20151U636 | 19 May 1977 | PNO-77-087:on 770515,licensee Identified Two Failed Fuel Bundles with Parts of Fuel Rods Missing.Pieces Found Resting on Top of Adjacent Fuel Bundle.Licensee Developing Procedure for Recovery of Pieces on Top of Core.No Press Release Made |