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| 05000249/LER-1976-001-01, During Weekly Turbine Surveillance Testing,Closure of Control Valve 2 Failed to Initiate Reactor Half Scram.Caused by Malfunctioning Solenoid Valve.Solenoid Replaced | During Weekly Turbine Surveillance Testing,Closure of Control Valve 2 Failed to Initiate Reactor Half Scram.Caused by Malfunctioning Solenoid Valve.Solenoid Replaced | |
| 05000237/LER-1976-001, Regarding Receipt of Oscillograph Alarms on the 138KV Yard and Observance of Ocb Bus 1 Disconnect to Be Arcing and Glowing | Regarding Receipt of Oscillograph Alarms on the 138KV Yard and Observance of Ocb Bus 1 Disconnect to Be Arcing and Glowing | |
| 05000249/LER-1976-001, :on 760104,during Weekly Surveillance Test,Closure of Control Valve 2 Failed to Initiate Reactor Half Scram. Caused by Malfunctioning Fast Acting Solenoid Valve.Work Request Issued to Replace & Test Solenoid |
- on 760104,during Weekly Surveillance Test,Closure of Control Valve 2 Failed to Initiate Reactor Half Scram. Caused by Malfunctioning Fast Acting Solenoid Valve.Work Request Issued to Replace & Test Solenoid
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| 05000237/LER-1976-002, Regarding an Occurrence of a Reactor Scram on Low Vacuum After Condenser Vacuum Was Broken While Unit Was Down for Maintenance | Regarding an Occurrence of a Reactor Scram on Low Vacuum After Condenser Vacuum Was Broken While Unit Was Down for Maintenance | |
| 05000249/LER-1976-002, :on 760107,during Routine Insp,Eccs Fill Jockey Pump Found Inoperable.Caused by Insufficient Lubrication. ECCS Jockey Pump Coupling Will Be Added to Lubrication Program |
- on 760107,during Routine Insp,Eccs Fill Jockey Pump Found Inoperable.Caused by Insufficient Lubrication. ECCS Jockey Pump Coupling Will Be Added to Lubrication Program
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| 05000237/LER-1976-003, Regarding Discovery of B Tip Probe at Position 9557, Which Is Past the Normal In-Shield Position of 9649 | Regarding Discovery of B Tip Probe at Position 9557, Which Is Past the Normal In-Shield Position of 9649 | |
| 05000249/LER-1976-003, :on 760110,during Weekly Turbine Check,Closure of Control Valve 2 Failed to Initiate Reactor Half Scram.Cause Unknown.Fast Acting Solenoid Will Be Inspected |
- on 760110,during Weekly Turbine Check,Closure of Control Valve 2 Failed to Initiate Reactor Half Scram.Cause Unknown.Fast Acting Solenoid Will Be Inspected
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| 05000237/LER-1976-004, Regarding Discovery of the Drywell High Pressure Scram Sensor PS-2-1621-B to Be Set 0.07 PSI Beyond the Technical Specification Limit of 2.00 PSI | Regarding Discovery of the Drywell High Pressure Scram Sensor PS-2-1621-B to Be Set 0.07 PSI Beyond the Technical Specification Limit of 2.00 PSI | |
| 05000249/LER-1976-004, :on 760303,during Surveillance Testing, Diesel Generator Could Not Be Loaded from Control Room Due to Loose Governor Control Wire.Apparently Caused by Vibration.Event Under Review |
- on 760303,during Surveillance Testing, Diesel Generator Could Not Be Loaded from Control Room Due to Loose Governor Control Wire.Apparently Caused by Vibration.Event Under Review
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| 05000237/LER-1976-005, Regarding Discovery of Isolation Condenser Condensate High Flow DPIS 1349B to Actuate at 33.0 Inches Dp Increasing Which Is Above the Technical Specifications | Regarding Discovery of Isolation Condenser Condensate High Flow DPIS 1349B to Actuate at 33.0 Inches Dp Increasing Which Is Above the Technical Specifications | |
| 05000249/LER-1976-006, :on 760324,drain Valve 2-4999-74 Found Blocked Open Mechanically & Electrically Inoperable.Caused by Valves Not Functionally Tested After Mods |
- on 760324,drain Valve 2-4999-74 Found Blocked Open Mechanically & Electrically Inoperable.Caused by Valves Not Functionally Tested After Mods
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| 05000237/LER-1976-007, Regarding Discovery of the Drywell-To-Torus Dp Dropping to .95 and Below 1.00 | Regarding Discovery of the Drywell-To-Torus Dp Dropping to .95 and Below 1.00 | |
| 05000249/LER-1976-007, :on 760428,following Removal of Rechar Sys from Svc,Explosion Occurred in 3B Offgas Sys.Cause Unknown. Investigation Initiated |
- on 760428,following Removal of Rechar Sys from Svc,Explosion Occurred in 3B Offgas Sys.Cause Unknown. Investigation Initiated
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| 05000249/LER-1976-008, :on 760430,during Surveillance Testing,Component Cooling Svc Water Pump Vault Penetrations Found to Leak When Pressurized.Caused by Improper Application of Silicone Sealant |
- on 760430,during Surveillance Testing,Component Cooling Svc Water Pump Vault Penetrations Found to Leak When Pressurized.Caused by Improper Application of Silicone Sealant
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| 05000237/LER-1976-009, Regarding HPCI Steam Supply Valve 2-2301-4 Closing and Failure to Reopen During the Quarterly Timing Test | Regarding HPCI Steam Supply Valve 2-2301-4 Closing and Failure to Reopen During the Quarterly Timing Test | |
| 05000249/LER-1976-009, :on 760510,during Surveillance Test on Core Spray Valves,Valve Mo 3-1402-25B Tripped on Thermal Overload. Caused by Undersized Overload Heater.Mod Initiated to Replace Overload Heaters |
- on 760510,during Surveillance Test on Core Spray Valves,Valve Mo 3-1402-25B Tripped on Thermal Overload. Caused by Undersized Overload Heater.Mod Initiated to Replace Overload Heaters
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| 05000249/LER-1976-010, :on 760618,during Routine Insp,Reactor Water Found Leaking from Cleanup non-regenerative HX 3B-1204B. Caused by Lack of Fusion in Weld,Grinding,Rewelding & Testing.Cracks Ground Out |
- on 760618,during Routine Insp,Reactor Water Found Leaking from Cleanup non-regenerative HX 3B-1204B. Caused by Lack of Fusion in Weld,Grinding,Rewelding & Testing.Cracks Ground Out
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| 05000237/LER-1976-010, Regarding Observation of a Leakage Rate of 167 Scfh for the Volume Bounded by Air-Operated Valves 1601-23, -24, -60, -61, -62, and -63 | Regarding Observation of a Leakage Rate of 167 Scfh for the Volume Bounded by Air-Operated Valves 1601-23, -24, -60, -61, -62, and -63 | |
| 05000237/LER-1976-011, Regarding an Occurrence of Leakage in Excess of the 29.381 Scfh Limit Through Valve 2-1601-56 | Regarding an Occurrence of Leakage in Excess of the 29.381 Scfh Limit Through Valve 2-1601-56 | |
| 05000249/LER-1976-011, :on 760622,during Routine Instrument Surveillance Testing,Sustained High Reactor Pressure Switch 3-263-53A Found to Actuate Above Tech Spec Limit.Caused by Setpoint Drift.Switch Will Be Checked monthly.W/760720 |
- on 760622,during Routine Instrument Surveillance Testing,Sustained High Reactor Pressure Switch 3-263-53A Found to Actuate Above Tech Spec Limit.Caused by Setpoint Drift.Switch Will Be Checked monthly.W/760720
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| 05000249/LER-1976-012, :on 760503,during Quarterly MSIV Timing Surveillance Testing,Msiv 3-203-1A Closed Above Tech Spec Limit.Caused by Dried Valve Packing.Valve Timing Adjusted |
- on 760503,during Quarterly MSIV Timing Surveillance Testing,Msiv 3-203-1A Closed Above Tech Spec Limit.Caused by Dried Valve Packing.Valve Timing Adjusted
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| 05000237/LER-1976-012, Regarding Discovery of the 2A LPCI Pump Breaker to Be Out of Service | Regarding Discovery of the 2A LPCI Pump Breaker to Be Out of Service | |
| 05000249/LER-1976-013, :on 760713,during steady-state Unit Operation, Circuit Breaker for Diesel Generator Cooling Water Pump Found in Tripped Position.Caused by Worn Pump Bearings. Mod Initiated |
- on 760713,during steady-state Unit Operation, Circuit Breaker for Diesel Generator Cooling Water Pump Found in Tripped Position.Caused by Worn Pump Bearings. Mod Initiated
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| 05000237/LER-1976-013, Regarding Discovery of Drain Valve 2-4999-74 to Be Blocked Open Mechanically and Electrically Inoperable | Regarding Discovery of Drain Valve 2-4999-74 to Be Blocked Open Mechanically and Electrically Inoperable | |
| 05000249/LER-1976-014, :on 760902,during Startup Operations,Control Room Indication Showed MSIV 3-203-2B Failed to Fully Close.Caused by Slippage of Actuator Arm of position-indicating Limit Switch on Shaft |
- on 760902,during Startup Operations,Control Room Indication Showed MSIV 3-203-2B Failed to Fully Close.Caused by Slippage of Actuator Arm of position-indicating Limit Switch on Shaft
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| 05000237/LER-1976-014, Regarding an Occurrence of Valves 2-1601-32A and -32E Exceeding the Individual Penetration Leak Rate Limit of 29.381 Scfh | Regarding an Occurrence of Valves 2-1601-32A and -32E Exceeding the Individual Penetration Leak Rate Limit of 29.381 Scfh | |
| 05000249/LER-1976-015, :on 760912,during Routine Plant Insp,Steam Leak Found in Elbow on Moisture Separator Drain Tank Line B to D Feedwater Heaters.Caused by Failure of Support Bolt Due to Surge in Process Stream.Crack Ground & Welded |
- on 760912,during Routine Plant Insp,Steam Leak Found in Elbow on Moisture Separator Drain Tank Line B to D Feedwater Heaters.Caused by Failure of Support Bolt Due to Surge in Process Stream.Crack Ground & Welded
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| 05000237/LER-1976-015, Regarding Appearance of Isolation Condenser Pipeway Snubbers 2 and 3 to Be in an Inoperable Condition Due to Loss of Fluid | Regarding Appearance of Isolation Condenser Pipeway Snubbers 2 and 3 to Be in an Inoperable Condition Due to Loss of Fluid | |
| 05000237/LER-1976-016, Regarding a Discovery of a Through-Wall Crack in the 14-Inch HPCI Sensitized Stainless Steel Safe-End | Regarding a Discovery of a Through-Wall Crack in the 14-Inch HPCI Sensitized Stainless Steel Safe-End | |
| 05000249/LER-1976-016, :on 760918,during Local Leak Rate Testing of Drywell & Torus Vent Isolation Valves,Valve 3-1601-23 Exhibited Leak Rate Above Tech Spec Limit.Caused by Packing Failures.Packing Bolts Tightened |
- on 760918,during Local Leak Rate Testing of Drywell & Torus Vent Isolation Valves,Valve 3-1601-23 Exhibited Leak Rate Above Tech Spec Limit.Caused by Packing Failures.Packing Bolts Tightened
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| 05000249/LER-1976-017, :on 760918,during de-inerting of Drywell,Oxygen Concentration Exceeded 4%.Facility Not Shut Down within 24 H Period in Order to Satisfy Min Sys Load Requirements |
- on 760918,during de-inerting of Drywell,Oxygen Concentration Exceeded 4%.Facility Not Shut Down within 24 H Period in Order to Satisfy Min Sys Load Requirements
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| 05000237/LER-1976-017, Regarding an Occurrence of Standby Liquid Control Isolation Check Valve 2-1101-16 Exceeding the 29.381 Scfh Limit | Regarding an Occurrence of Standby Liquid Control Isolation Check Valve 2-1101-16 Exceeding the 29.381 Scfh Limit | |
| 05000249/LER-1976-018, :on 760921,during Refueling Outage Local Leak Rate Testing,Feedwater Check Valves 3-220-58A & 62A Exhibited Leak Rates Above Tech Spec Limit.Caused by Dirt in Seating Area & Worn Disc Assembly Pins |
- on 760921,during Refueling Outage Local Leak Rate Testing,Feedwater Check Valves 3-220-58A & 62A Exhibited Leak Rates Above Tech Spec Limit.Caused by Dirt in Seating Area & Worn Disc Assembly Pins
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| 05000237/LER-1976-018, Regarding Discovery of Feedwater Isolation Check Valves 2-220-58B and -62B to Exceed the 29.381 Scfh Technical Specification Limit | Regarding Discovery of Feedwater Isolation Check Valves 2-220-58B and -62B to Exceed the 29.381 Scfh Technical Specification Limit | |
| 05000237/LER-1976-019, Regarding the Discovery of Loose Retainer Clamp Bolt Keepers on 19 of 20 Jet Pumps | Regarding the Discovery of Loose Retainer Clamp Bolt Keepers on 19 of 20 Jet Pumps | |
| 05000249/LER-1976-019, :on 760921,diesel Generator Not Shutdown Following Return to Svc of Bus 34-1 & Engine High Temp Alarm Received. Caused by Partially Clogged Strainer in Lube Oil Circulating Pump.Strainer Cleaned |
- on 760921,diesel Generator Not Shutdown Following Return to Svc of Bus 34-1 & Engine High Temp Alarm Received. Caused by Partially Clogged Strainer in Lube Oil Circulating Pump.Strainer Cleaned
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| 05000237/LER-1976-020, Regarding HPCI Valve 2-2301-45 Exhibiting Seat Leakage in Excess of the Tech Spec Limit | Regarding HPCI Valve 2-2301-45 Exhibiting Seat Leakage in Excess of the Tech Spec Limit | |
| 05000249/LER-1976-020, :on 760922,during Refueling Outage Local Leak Rate Testing,Vol Bounded by Main Steam Line Drain Valves 3-220-1 & 2 Exhibited Leak Above Tech Specs Limit.Probably Caused by Deteriorated Pressure Seal Ring |
- on 760922,during Refueling Outage Local Leak Rate Testing,Vol Bounded by Main Steam Line Drain Valves 3-220-1 & 2 Exhibited Leak Above Tech Specs Limit.Probably Caused by Deteriorated Pressure Seal Ring
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| 05000249/LER-1976-020-01, Vol Bounded by Steam Line Drain Valves 3-220-1 & 2 Exhibited Leakage Above Tech Spec Limits.Caused by Deteriorated body-to-bonnet Pressure Seal Ring & Dirt in Seating Area | Vol Bounded by Steam Line Drain Valves 3-220-1 & 2 Exhibited Leakage Above Tech Spec Limits.Caused by Deteriorated body-to-bonnet Pressure Seal Ring & Dirt in Seating Area | |
| 05000249/LER-1976-021, :on 760924,during Routine Insp of Drywell Snubbers,Snubbers 24 & 30 Appeared to Be Inoperable Due to Loss of Fluid.Caused by Leakage Through Grease Fittings. Grease Fittings Replaced |
- on 760924,during Routine Insp of Drywell Snubbers,Snubbers 24 & 30 Appeared to Be Inoperable Due to Loss of Fluid.Caused by Leakage Through Grease Fittings. Grease Fittings Replaced
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| 05000237/LER-1976-021, Regarding Discovery of an Indication in the Isolation Condenser Sensitized Stainless Steel Safe-End | Regarding Discovery of an Indication in the Isolation Condenser Sensitized Stainless Steel Safe-End | |
| 05000249/LER-1976-022, :on 760929,during Prerequisite Testing for Refueling Outage LPCI Logic Surveillance,Dpis 261-34A Failed to Trip.Caused by Roller Cam Being Jammed by Microswitch Actuating Arm.Switch Repaired |
- on 760929,during Prerequisite Testing for Refueling Outage LPCI Logic Surveillance,Dpis 261-34A Failed to Trip.Caused by Roller Cam Being Jammed by Microswitch Actuating Arm.Switch Repaired
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| 05000237/LER-1976-022, Regarding Discovery of Smoke Emanating from the ECCS Jockey Pump 1401-2As Control Feeder Breaker at MCC 28-1 | Regarding Discovery of Smoke Emanating from the ECCS Jockey Pump 1401-2As Control Feeder Breaker at MCC 28-1 | |
| 05000249/LER-1976-023, :on 761007,during Refueling Outage Local Leak Rate Testing,Lpci Primary Isolation Check Valve 3-1501-25B Exhibited Leak Rate Above Tech Spec Limit.Caused by Dirt & Scratches on Valve Seat.Valve Cleaned |
- on 761007,during Refueling Outage Local Leak Rate Testing,Lpci Primary Isolation Check Valve 3-1501-25B Exhibited Leak Rate Above Tech Spec Limit.Caused by Dirt & Scratches on Valve Seat.Valve Cleaned
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| 05000237/LER-1976-023, Regarding an Occurrence of Seven of Nine Penetrations Failed a Surveillance Test by Exhibiting Leakage | Regarding an Occurrence of Seven of Nine Penetrations Failed a Surveillance Test by Exhibiting Leakage | |
| 05000249/LER-1976-024-01, :on 761009,following Refueling Outage Surveillance Test of Diesel Generator,Engine Speed Could Not Be Regulated from Control Room.Caused by Loose Wire on Diesel Governor Control Circuit.Wire Tightened |
- on 761009,following Refueling Outage Surveillance Test of Diesel Generator,Engine Speed Could Not Be Regulated from Control Room.Caused by Loose Wire on Diesel Governor Control Circuit.Wire Tightened
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| 05000237/LER-1976-024, Regarding Premature Lifting of Sblc Relief Valve 1105-A During the Refueling Outage | Regarding Premature Lifting of Sblc Relief Valve 1105-A During the Refueling Outage | |
| 05000249/LER-1976-024, Following Refueling Outage Surveillance Testing of Diesel Generator,Engine Speed Could Not Be Adjusted from Control Room.Caused by Loose Wire on Diesel Governor Control Circuit | Following Refueling Outage Surveillance Testing of Diesel Generator,Engine Speed Could Not Be Adjusted from Control Room.Caused by Loose Wire on Diesel Governor Control Circuit | |
| 05000249/LER-1976-025, :on 761007,during Refueling Outage Local Leak Rate Testing,Feedwater Check Valves 3-820-58B & 62B Exhibited Leakage Rates Above Tech Spec Limit.Caused by Dirt in Seating Area.Valve Cleaned & Retested |
- on 761007,during Refueling Outage Local Leak Rate Testing,Feedwater Check Valves 3-820-58B & 62B Exhibited Leakage Rates Above Tech Spec Limit.Caused by Dirt in Seating Area.Valve Cleaned & Retested
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| 05000237/LER-1976-025, Regarding a Failure to Verify Personnel Evacuation from the 613 Level During Control Rod Movements | Regarding a Failure to Verify Personnel Evacuation from the 613 Level During Control Rod Movements | |