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| 05000250/LER-1978-017-03, /03L-0:on 780514,improper Switching at Pratt & Whitney Substation & Incorrect Wiring of Protective Relays at Midway Substation Led to de-energization.Offsite Power Lost.Incorrect Wiring Corrected | /03L-0:on 780514,improper Switching at Pratt & Whitney Substation & Incorrect Wiring of Protective Relays at Midway Substation Led to de-energization.Offsite Power Lost.Incorrect Wiring Corrected | |
| 05000250/LER-1978-017, Forwards LER 78-017/03L-0 | Forwards LER 78-017/03L-0 | |
| 05000335/LER-1978-025-03, /03L-0 Update on 780905:2 Damper Motors in Suction Line for HVE-9B Blew Fuses in Control Circuits, Causing B Train to Be Oper, Rather than Inoper as Previously Reported.Condition Is Not Reportable Per Tech Specs | /03L-0 Update on 780905:2 Damper Motors in Suction Line for HVE-9B Blew Fuses in Control Circuits, Causing B Train to Be Oper, Rather than Inoper as Previously Reported.Condition Is Not Reportable Per Tech Specs | |
| 05000335/LER-1978-033-03, /03L-0 on 780901:During Plant Startup from Short Maint Shutdown, the Dose Equivalent of Iodine Exceeded Tech Spec Due to Plant Shutdown & Subsequent Startup Transients | /03L-0 on 780901:During Plant Startup from Short Maint Shutdown, the Dose Equivalent of Iodine Exceeded Tech Spec Due to Plant Shutdown & Subsequent Startup Transients | |
| 05000335/LER-1978-033, Forwards LER 78-033/03L-0 | Forwards LER 78-033/03L-0 | |
| 05000335/LER-1978-034-03, /03L-0 on 780902:during Short Maint Shutdown, Charging Pump 1A Was Found to Have Cracked Pump Casing, Probably Due to Suction cavitation.1Apump Casing Will Be Replaced & Damping Device Installed on Pump Suction Line | /03L-0 on 780902:during Short Maint Shutdown, Charging Pump 1A Was Found to Have Cracked Pump Casing, Probably Due to Suction cavitation.1Apump Casing Will Be Replaced & Damping Device Installed on Pump Suction Line | |
| 05000335/LER-1978-034, Forwards LER 78-034/03L-0 | Forwards LER 78-034/03L-0 | |
| 05000335/LER-1978-035-03, /03L-0 on 780905:During Full Pwr Oper 2 Damper Motors in the Suction Line for ECCS Area Exhaust Fan HVE-9B Blew Control Circuit Fuses,Caused by Loss of Insulating Fluid Thru Leaking Gasket in One Motor,Shorting Both Out | /03L-0 on 780905:During Full Pwr Oper 2 Damper Motors in the Suction Line for ECCS Area Exhaust Fan HVE-9B Blew Control Circuit Fuses,Caused by Loss of Insulating Fluid Thru Leaking Gasket in One Motor,Shorting Both Out | |
| 05000335/LER-1978-035, Forwards LER 78-035/03L-0 | Forwards LER 78-035/03L-0 | |
| 05000335/LER-1978-036-03, /03l-0 on 780905:during Monthly Surveillance on a Diesel Generator the 4160V Tie Breaker to Its Emergency Bus Would Not Close Remotely from Control Room Due to Dirty Contacts on Oper Relay | /03l-0 on 780905:during Monthly Surveillance on a Diesel Generator the 4160V Tie Breaker to Its Emergency Bus Would Not Close Remotely from Control Room Due to Dirty Contacts on Oper Relay | |
| 05000335/LER-1978-036, Forwards LER 78-036/03l-0 | Forwards LER 78-036/03l-0 | |
| 05000335/LER-1978-037, Forwards LER 78-037/01T-1 | Forwards LER 78-037/01T-1 | |
| 05000335/LER-1978-037-01, /01T-1 on 780919:during Sys Insp,Class I Longitudinal Braces on Auxiliary Bldg Ventilation Ducts Were Found Missing.Caused by Unique Combination of Personnel Errors | /01T-1 on 780919:during Sys Insp,Class I Longitudinal Braces on Auxiliary Bldg Ventilation Ducts Were Found Missing.Caused by Unique Combination of Personnel Errors | |
| 05000335/LER-1978-038-01, /01T-0 on 780925,input Error Made to ECCS Analysis Re Containment Spray Flow.Caused by Ambiguous Data Supplied by Ae.Amend to Cycle 2 ECCS Analysis Will Be Issued Shortly | /01T-0 on 780925,input Error Made to ECCS Analysis Re Containment Spray Flow.Caused by Ambiguous Data Supplied by Ae.Amend to Cycle 2 ECCS Analysis Will Be Issued Shortly | |
| 05000335/LER-1978-038, Forwards LER 78-038/01T-0 | Forwards LER 78-038/01T-0 | |
| 05000335/LER-1978-039-03, /03L-0:on 780930,during Power Operation,Digital Processing Sys Malfunctioned.Caused by Momentary Memory Failure.Sys Repaired & Placed Back in Svc in 70 Minutes | /03L-0:on 780930,during Power Operation,Digital Processing Sys Malfunctioned.Caused by Momentary Memory Failure.Sys Repaired & Placed Back in Svc in 70 Minutes | |
| 05000335/LER-1978-039, Forwards LER 78-039/03L-0 | Forwards LER 78-039/03L-0 | |
| 05000335/LER-1978-040, Forwards LER 78-040/03L-0 | Forwards LER 78-040/03L-0 | |
| 05000335/LER-1978-040-03, /03L-0 on 781002:During Pwr oper,1B Charging Pump Failed to Start While Only 1C Pump Was operable.Cause:1B Suction Pressure Gage Waspegged Highdue to Leaking Valve. Valve Repaired,Gage Vented & Pump Returned to Svc | /03L-0 on 781002:During Pwr oper,1B Charging Pump Failed to Start While Only 1C Pump Was operable.Cause:1B Suction Pressure Gage Waspegged Highdue to Leaking Valve. Valve Repaired,Gage Vented & Pump Returned to Svc | |
| 05000335/LER-1978-041, Forwards LER 78-041/01T-0 | Forwards LER 78-041/01T-0 | |
| 05000335/LER-1978-041-01, /01T-0 on 781103:water from Reactor Coolant Sys Injected Through a Containment Spray Header.Caused by Improper Clearance Removal Instructions & 2 Isolation Valves Opened Between Spray Sys & Shutdown Cooling Sys by Operator | /01T-0 on 781103:water from Reactor Coolant Sys Injected Through a Containment Spray Header.Caused by Improper Clearance Removal Instructions & 2 Isolation Valves Opened Between Spray Sys & Shutdown Cooling Sys by Operator | |
| 05000335/LER-1978-042-01, /01T-0 on 781111:4 Solenoid Operated Naoh Addition Sys Valves Found de-energized Due to Failure to Replace Fuses for Valves SE07-1A,1B,2A & 2B During Plant Heatup & Following Outage | /01T-0 on 781111:4 Solenoid Operated Naoh Addition Sys Valves Found de-energized Due to Failure to Replace Fuses for Valves SE07-1A,1B,2A & 2B During Plant Heatup & Following Outage | |
| 05000335/LER-1978-042, Forwards LER 78-042/01T-0 | Forwards LER 78-042/01T-0 | |
| 05000335/LER-1978-043-03, /03L-1 on 781120:during Power Operation Cambridge Electron Accelerator 62 Slipped 13 Inches a Second Time to Point 43 Inches Below Original Position.Personnel Misinterpreted Tech Specs | /03L-1 on 781120:during Power Operation Cambridge Electron Accelerator 62 Slipped 13 Inches a Second Time to Point 43 Inches Below Original Position.Personnel Misinterpreted Tech Specs | |
| 05000335/LER-1978-043, Forwards LER 78-043/03L-0 | Forwards LER 78-043/03L-0 | |
| 05000335/LER-1978-044, Forwards LER 78-044/03L-0 | Forwards LER 78-044/03L-0 | |
| 05000335/LER-1978-044-03, /03L-0 on 781121:motor Operated Valve Mv 07-13 Failed to Open Electrically Following Closure Due to Faulty Torque Switch on Valve Operator.Switch Replaced & Valve Checked | /03L-0 on 781121:motor Operated Valve Mv 07-13 Failed to Open Electrically Following Closure Due to Faulty Torque Switch on Valve Operator.Switch Replaced & Valve Checked | |
| 05000335/LER-1978-045-03, /03L-1 on 790305:during Power Operation,Digital Data Processing Sys Malfunctioned.Caused by Error in Program Installed by Licensee in June 1978.Program Error Corrected | /03L-1 on 790305:during Power Operation,Digital Data Processing Sys Malfunctioned.Caused by Error in Program Installed by Licensee in June 1978.Program Error Corrected | |
| 05000335/LER-1978-045, Forwards LER 78-045/03L-1 | Forwards LER 78-045/03L-1 | |
| 05000335/LER-1978-046-03, /03L-0 on 781207:during Power Operation,Control Element Assembly 59 Dropped as It Was Manually Inserted to 100 in Position for Moderator Temp Coefficient Test.Cause Unknown | /03L-0 on 781207:during Power Operation,Control Element Assembly 59 Dropped as It Was Manually Inserted to 100 in Position for Moderator Temp Coefficient Test.Cause Unknown | |
| 05000335/LER-1978-046, Forwards LER 78-046/03L-0 | Forwards LER 78-046/03L-0 | |
| 05000333/LER-1978-089, Forwards LER 78-089/03L-0 | Forwards LER 78-089/03L-0 | |