| | | Reporting criterion |
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| 05000301/LER-1978-009-03, /03L-0 on 780913:on 2 occasions,2 of 3 Charging Pumps Were isolated.2 3/4 Crosby Relief Valves Leaked Through Causing Temporary Loss of Charging Flow.Charging Pump Relief Valve Replaced & a Pump Returned to Svc | /03L-0 on 780913:on 2 occasions,2 of 3 Charging Pumps Were isolated.2 3/4 Crosby Relief Valves Leaked Through Causing Temporary Loss of Charging Flow.Charging Pump Relief Valve Replaced & a Pump Returned to Svc | |
| 05000301/LER-1978-009, Forwards LER 78-009/03L-0 | Forwards LER 78-009/03L-0 | |
| 05000301/LER-1978-010, Forwards LER 78-010/01T-0 | Forwards LER 78-010/01T-0 | |
| 05000301/LER-1978-010-01, /01T-0 on 780928:reactor Coolant Sys Pressure Began Dropping at 25 Psi Per Minute;Pressurizer Spray Value 431B Found Partially Open Despite Shut Signal Due to 0 Set Point Drift Caused by Heat Degradation in Transducer | /01T-0 on 780928:reactor Coolant Sys Pressure Began Dropping at 25 Psi Per Minute;Pressurizer Spray Value 431B Found Partially Open Despite Shut Signal Due to 0 Set Point Drift Caused by Heat Degradation in Transducer | |
| 05000266/LER-1978-010-01, /01T-1 on 780528:Indication of primary-to- Secondary Leak of 145 Gpd in the a SG Was Noted on 780524. Source of Leak Due to Failure of Tube at Position R44C35. Tube Plugged & Unit Returned to Svc | /01T-1 on 780528:Indication of primary-to- Secondary Leak of 145 Gpd in the a SG Was Noted on 780524. Source of Leak Due to Failure of Tube at Position R44C35. Tube Plugged & Unit Returned to Svc | |
| 05000301/LER-1978-011, Cancelled | Cancelled | |
| 05000301/LER-1978-012, Forwards LER 78-012/01T-0 | Forwards LER 78-012/01T-0 | |
| 05000266/LER-1978-012, Forwards LER 78-012/01X-0 | Forwards LER 78-012/01X-0 | |
| 05000266/LER-1978-012-01, /01X-0:on 780627,during Visual Insp of Fire Barrier Penetration Seals,Horizontal Seals Found Constructed Differently than Specified.Caused by Change in Const Drawings | /01X-0:on 780627,during Visual Insp of Fire Barrier Penetration Seals,Horizontal Seals Found Constructed Differently than Specified.Caused by Change in Const Drawings | |
| 05000301/LER-1978-012-01, /01T-0 on 781209:primary Loop a Resistance Temp Detector Manifold Isolated to Replace Leaking Orifice Flange Gasket.Took 2 of 4 Overtemp & Overpower Temp Difference Channels Out of Svc.Caused by Personnel Error | /01T-0 on 781209:primary Loop a Resistance Temp Detector Manifold Isolated to Replace Leaking Orifice Flange Gasket.Took 2 of 4 Overtemp & Overpower Temp Difference Channels Out of Svc.Caused by Personnel Error | |
| 05000266/LER-1978-014-01, /01T-0:on 780920,primary-to-secondary Leakage Noted During Normal Operation.Caused by Two Leaking Tubes & One Leaking Plug on Inlet Side of Steam Generator A.Tubes Will Be Plugged & Plug Will Be Weld Repaired | /01T-0:on 780920,primary-to-secondary Leakage Noted During Normal Operation.Caused by Two Leaking Tubes & One Leaking Plug on Inlet Side of Steam Generator A.Tubes Will Be Plugged & Plug Will Be Weld Repaired | |
| 05000266/LER-1978-014, Forwards LER 78-014/01T-0 | Forwards LER 78-014/01T-0 | |
| 05000266/LER-1978-015, Forwards LER 78-015/01T-0 | Forwards LER 78-015/01T-0 | |
| 05000266/LER-1978-015-01, /01T-0 on 781009:snubber on Pressurizer Relief Line Was Found Inoperable.Grinnel Model HS-17,21/2 Inch X 5 Inch Bore & Stroke Snubber Failed for Undetermined Cause. Snubber Replaced & Surveillance Prog Expanded | /01T-0 on 781009:snubber on Pressurizer Relief Line Was Found Inoperable.Grinnel Model HS-17,21/2 Inch X 5 Inch Bore & Stroke Snubber Failed for Undetermined Cause. Snubber Replaced & Surveillance Prog Expanded | |
| 05000266/LER-1978-016-01, /01T-0 on 781106:turbine Runback Resulted from Safeguards Bus Tie Breaker Trip.Westinghouse Model CV-7 Undervoltage Relay on Tie Breaker Tripped Causing Breaker to Open.No Line Voltage Surges Detected | /01T-0 on 781106:turbine Runback Resulted from Safeguards Bus Tie Breaker Trip.Westinghouse Model CV-7 Undervoltage Relay on Tie Breaker Tripped Causing Breaker to Open.No Line Voltage Surges Detected | |
| 05000266/LER-1978-017-01, /01T-0 on 781206:control Rod K-7 Control Bank D Became Misaligned More than 15 in & Caused Quadrant Flux Tilt of More than 2%.Caused by Personnel Error | /01T-0 on 781206:control Rod K-7 Control Bank D Became Misaligned More than 15 in & Caused Quadrant Flux Tilt of More than 2%.Caused by Personnel Error | |
| 05000266/LER-1978-017, Forwards LER 78-017/01T-0 | Forwards LER 78-017/01T-0 | |
| 05000266/LER-1978-018, Forwards LER 78-018/01T-0 | Forwards LER 78-018/01T-0 | |
| 05000266/LER-1978-018-01, /01T-0 on 781219:during Normal Power Operation, Power Range Channel 44 Failed,Causing 20% Turbine Runback. Failure of Power Designs,Inc,Model UPMP-X54W Power Supply Caused Instrument to Fail | /01T-0 on 781219:during Normal Power Operation, Power Range Channel 44 Failed,Causing 20% Turbine Runback. Failure of Power Designs,Inc,Model UPMP-X54W Power Supply Caused Instrument to Fail | |
| 05000266/LER-1978-019-01, /01T-0 on 7901228:both Heat Tracing Circuits of Circuit 47 of the Boric Acid Sys Were Inoperable Due to Defective Potentiometers in the Thermon Model SCR Controller for Each Circuit | /01T-0 on 7901228:both Heat Tracing Circuits of Circuit 47 of the Boric Acid Sys Were Inoperable Due to Defective Potentiometers in the Thermon Model SCR Controller for Each Circuit | |
| 05000266/LER-1978-019, Forwards LER 78-019/01T-0 | Forwards LER 78-019/01T-0 | |
| 05000266/LER-1978-073-03, /03L on 781121:failure to Submit RO 50-366/78-55 W/In 30 Days.Caused by Deviation Rept 2-78-79 Not Received by Responsible Dept Head Nor Superintendent of Plant Engr Svcs.Personnel Were Reminded of Procedures | /03L on 781121:failure to Submit RO 50-366/78-55 W/In 30 Days.Caused by Deviation Rept 2-78-79 Not Received by Responsible Dept Head Nor Superintendent of Plant Engr Svcs.Personnel Were Reminded of Procedures | |