05000249/LER-1978-001, /03L-0 for Dresden 3 Regarding the Discovery IRM Nos. 15 and 16 to Trip at 109% | /03L-0 for Dresden 3 Regarding the Discovery IRM Nos. 15 and 16 to Trip at 109% | |
05000237/LER-1978-002-01, /01T-0:on 780105,during Normal operation,locked- Open Suction Valve to Standby Liquid Injection Pumps Were Found Closed.Cause Unknown.Monthly Verification Has Been Added to Surveillance DOS 1100-1 | /01T-0:on 780105,during Normal operation,locked- Open Suction Valve to Standby Liquid Injection Pumps Were Found Closed.Cause Unknown.Monthly Verification Has Been Added to Surveillance DOS 1100-1 | |
05000249/LER-1978-002, /03L-0 for Dresden 3 Regarding the Failure of MO-3-1501-5C to Reopen While Performing DOS 1500-1. the Motor Oper. Suction Valve to C LPCI Pp. Closed But Could Not Be Reopened from Control Room | /03L-0 for Dresden 3 Regarding the Failure of MO-3-1501-5C to Reopen While Performing DOS 1500-1. the Motor Oper. Suction Valve to C LPCI Pp. Closed But Could Not Be Reopened from Control Room | |
05000237/LER-1978-003, /03L-0 for Dresden, Unit 2 Re Inadequacies in the Implementation of Administrative or Procedural Controls Which Threaten to Cause Reduction of Degree of Redundancy Provided in Reactor Protection Systems | /03L-0 for Dresden, Unit 2 Re Inadequacies in the Implementation of Administrative or Procedural Controls Which Threaten to Cause Reduction of Degree of Redundancy Provided in Reactor Protection Systems | |
05000249/LER-1978-003, /01T-0 for Dresden 3 Regarding Discovery of Containment Valve Leakages in Excess of Technical Specification 4.7.A Limits | /01T-0 for Dresden 3 Regarding Discovery of Containment Valve Leakages in Excess of Technical Specification 4.7.A Limits | |
05000237/LER-1978-004-01, T-0 for Dresden, Unit 2 Re Improper 125V DC Cable Separation | T-0 for Dresden, Unit 2 Re Improper 125V DC Cable Separation | |
05000237/LER-1978-005, /03L-0 for Dresden Unit 2 Regarding the Receipt of a Torus High/Low Level Alarm as a Result of Torus Level Transmitter Instrument Drift | /03L-0 for Dresden Unit 2 Regarding the Receipt of a Torus High/Low Level Alarm as a Result of Torus Level Transmitter Instrument Drift | |
05000249/LER-1978-005, /03L-0 for Dresden 3 Regarding the Discovery of a Pin Hole Leak in Minimum Flow Line from 3B Reactor Feedwater Pump Line 3-3205B-6 | /03L-0 for Dresden 3 Regarding the Discovery of a Pin Hole Leak in Minimum Flow Line from 3B Reactor Feedwater Pump Line 3-3205B-6 | |
05000249/LER-1978-006, /03L-0 for Dresden 3 Regarding the Discovery of Vacuum Breaker 1601-32F Binding | /03L-0 for Dresden 3 Regarding the Discovery of Vacuum Breaker 1601-32F Binding | |
05000010/LER-1978-007, Cancelled | Cancelled | |
05000249/LER-1978-007, /03L-0 for Dresden 3 Regarding Dis 2300-6 HPCI Area Temperature SW 2371 a Tripped at 284.3 Degrees Fahrenheit | /03L-0 for Dresden 3 Regarding Dis 2300-6 HPCI Area Temperature SW 2371 a Tripped at 284.3 Degrees Fahrenheit | |
05000249/LER-1978-009, /01T-0 for Dresden 3 Regarding an Ultrasonic Inspection of the Safe End-To-Pipe Weld on the CRD Return Line Revealed Indications Which Suggested Cracking | /01T-0 for Dresden 3 Regarding an Ultrasonic Inspection of the Safe End-To-Pipe Weld on the CRD Return Line Revealed Indications Which Suggested Cracking | |
05000010/LER-1978-009, Cancelled | Cancelled | |
05000249/LER-1978-009-01, /01X-1 on 780320:Cracks Found on end-to-pipe Weld on CRD Return Line.Caused by Intermittent to Low Cooling Water Flow Leaving the CRD Nozzle.Pipe Was Removed & Replaced. (Encl to 7809180035) | /01X-1 on 780320:Cracks Found on end-to-pipe Weld on CRD Return Line.Caused by Intermittent to Low Cooling Water Flow Leaving the CRD Nozzle.Pipe Was Removed & Replaced. (Encl to 7809180035) | |
05000237/LER-1978-009, /01T-0 for Dresden Unit 2 Regarding an Occurrence of a Conductivity Transient Due to Condensate Demineralizer Resin Introduction Into the Rx Vessel | /01T-0 for Dresden Unit 2 Regarding an Occurrence of a Conductivity Transient Due to Condensate Demineralizer Resin Introduction Into the Rx Vessel | |
05000249/LER-1978-010, /01T-0 for Dresden 3 Regarding Discovery of 6 Hydraulic Snubbers Nos. 18, 19, 20, and 33 in Unit 3 Drywell and Nos. 1 and 3 in Isolation Condenser Pipeway with Less than Required Amount of Fluid | /01T-0 for Dresden 3 Regarding Discovery of 6 Hydraulic Snubbers Nos. 18, 19, 20, and 33 in Unit 3 Drywell and Nos. 1 and 3 in Isolation Condenser Pipeway with Less than Required Amount of Fluid | |
05000249/LER-1978-011, /01T-0 for Dresden 3 Regarding Cracks Identified in Cladding of CRD Nozzle Inner Radius and Vessel Wall Beneath Nozzle | /01T-0 for Dresden 3 Regarding Cracks Identified in Cladding of CRD Nozzle Inner Radius and Vessel Wall Beneath Nozzle | |
05000249/LER-1978-012, /01T-0 for Dresden 3 Regarding Disclosure of One Apparent Crack-Like Indication on the 330 Degrees Feedwater Sparger Along with Several Indications on the CRD Nozzle Thermal Sleeve Retainer | /01T-0 for Dresden 3 Regarding Disclosure of One Apparent Crack-Like Indication on the 330 Degrees Feedwater Sparger Along with Several Indications on the CRD Nozzle Thermal Sleeve Retainer | |
05000249/LER-1978-013, /01T-0 for Dresden 3 Regarding Setpoints Being Set High by 10% During the Quarterly Scheduled Calibration Dis 1700-1 | /01T-0 for Dresden 3 Regarding Setpoints Being Set High by 10% During the Quarterly Scheduled Calibration Dis 1700-1 | |
05000249/LER-1978-014, /01T-0 for Dresden 3 Regarding 24/48 Vdc Battery Failure to Pass the Refueling Outage Discharge Test | /01T-0 for Dresden 3 Regarding 24/48 Vdc Battery Failure to Pass the Refueling Outage Discharge Test | |
05000249/LER-1978-015, /03L-0 for Dresden 3 Regarding Discovery of One Snubber in Drywell to Be Functionally Inoperable by Bench Test During Inspection to Check 10% of All Hydraulic Snubbers During Refueling | /03L-0 for Dresden 3 Regarding Discovery of One Snubber in Drywell to Be Functionally Inoperable by Bench Test During Inspection to Check 10% of All Hydraulic Snubbers During Refueling | |
05000237/LER-1978-015-03, /03X-1 on 770402:CRD L-5 Uncoupled & Overtraveled When W/Drawn to Pos 48.Caused by Unlatched Inner Filter & Abnormally Long Uncoupling Rod.Procedure Rev & QA Coverage Improved to Prevent Future CRD Uncouplings | /03X-1 on 770402:CRD L-5 Uncoupled & Overtraveled When W/Drawn to Pos 48.Caused by Unlatched Inner Filter & Abnormally Long Uncoupling Rod.Procedure Rev & QA Coverage Improved to Prevent Future CRD Uncouplings | |
05000249/LER-1978-016, /03L-0 for Dresden 3 Regarding Leakage Through Standby Liquid Control Check Valve 3-1101-15 Exceeding the T.S.4.7.A Limit for Single Valve Leakage of 29.38 Scfh | /03L-0 for Dresden 3 Regarding Leakage Through Standby Liquid Control Check Valve 3-1101-15 Exceeding the T.S.4.7.A Limit for Single Valve Leakage of 29.38 Scfh | |
05000249/LER-1978-017, /01T-0 for Dresden 3 Regarding an NRC Request That Immediate Action Be Taken to Mitigate the Potential for a Spurious Closure of a Recirculation Loop Suction Valve with a LOCA Occurring Between the Loop Discharge and Suction Va | /01T-0 for Dresden 3 Regarding an NRC Request That Immediate Action Be Taken to Mitigate the Potential for a Spurious Closure of a Recirculation Loop Suction Valve with a LOCA Occurring Between the Loop Discharge and Suction Valves | |
05000249/LER-1978-018, /03L-0 for Dresden 3 Regarding the Discovery of U3 Diesel Oil Storage Tank at 9000 Gal. Which Is Below the 10000 Gal. Limit Required by Technical Specification 3.9.c | /03L-0 for Dresden 3 Regarding the Discovery of U3 Diesel Oil Storage Tank at 9000 Gal. Which Is Below the 10000 Gal. Limit Required by Technical Specification 3.9.c | |
05000249/LER-1978-019, /03L-0 for Dresden 3 Regarding the Discovery of Ps 504C and 504D Found to Trip at 403 PSI and 405 PSI Respectively | /03L-0 for Dresden 3 Regarding the Discovery of Ps 504C and 504D Found to Trip at 403 PSI and 405 PSI Respectively | |
05000249/LER-1978-020, /03L-0 for Dresden 3 Regarding Discovery of Ps 3-203-3C Tripped at 1148 PSI Rx Pressure Incr | /03L-0 for Dresden 3 Regarding Discovery of Ps 3-203-3C Tripped at 1148 PSI Rx Pressure Incr | |
05000237/LER-1978-020, /03X-01 for Dresden, Unit 1 Re Cause of Failure of the Diesel Generator to Start | /03X-01 for Dresden, Unit 1 Re Cause of Failure of the Diesel Generator to Start | |
05000249/LER-1978-022, /03L-0 for Dresden Unit 3 Regarding Discovery of High Flow Isolation Switches DPIS 261-2C, 261-2N, and 261-2S to Trip at Values Exceeding the Technical Specification Limit | /03L-0 for Dresden Unit 3 Regarding Discovery of High Flow Isolation Switches DPIS 261-2C, 261-2N, and 261-2S to Trip at Values Exceeding the Technical Specification Limit | |
05000249/LER-1978-023, /01T-0 for Dresden Unit 3 Regarding Source Range Monitors 24 and 21 Being Declared Inoperable on 05/20/1978 | /01T-0 for Dresden Unit 3 Regarding Source Range Monitors 24 and 21 Being Declared Inoperable on 05/20/1978 | |
05000249/LER-1978-024, /03L-0 for Dresden Unit 3 Regarding the Discovery of PS3-263-53A to Trip at 1178 PSI Which Is Above Technical Specifications | /03L-0 for Dresden Unit 3 Regarding the Discovery of PS3-263-53A to Trip at 1178 PSI Which Is Above Technical Specifications | |
05000010/LER-1978-025, Cancelled | Cancelled | |
05000237/LER-1978-025, /03L-0 for Dresden Unit 3 Regarding Discovery of a Spike on the Liquid Process Radiation Monitor for the Service Water Discharge | /03L-0 for Dresden Unit 3 Regarding Discovery of a Spike on the Liquid Process Radiation Monitor for the Service Water Discharge | |
05000237/LER-1978-025-03, Re While Preforming LPCI and Ccsw Surveillance on Unit 3 Prior to Taking the U-3 D/G Out of Service, a Spike Was Found on the Liquid Process Radiation Monitor for the Service Water Discharge | Re While Preforming LPCI and Ccsw Surveillance on Unit 3 Prior to Taking the U-3 D/G Out of Service, a Spike Was Found on the Liquid Process Radiation Monitor for the Service Water Discharge | |
05000237/LER-1978-026-03, Re While Performing LPCI Both Indicating Lights Went Out and the Motor Stopped | Re While Performing LPCI Both Indicating Lights Went Out and the Motor Stopped | |
05000237/LER-1978-027, /03L for Dresden, Unit 2 Re a Sample Taken from Radwaste a WST at 1020 After the Tank Was Filled to 88% | /03L for Dresden, Unit 2 Re a Sample Taken from Radwaste a WST at 1020 After the Tank Was Filled to 88% | |
05000249/LER-1978-028-03, Re While Performing Surv. Dis 250-1, MSL Hi Flow Isolation Sw. Dpis 3-261-2c Tripped at 117 Psid | Re While Performing Surv. Dis 250-1, MSL Hi Flow Isolation Sw. Dpis 3-261-2c Tripped at 117 Psid | |
05000237/LER-1978-028, /01X-1 for Dresden, Units 2 and 3 Re NRC Request for Immediate Actions to Be Taken to Mitigate the Potential for a Spurious Closure of a Recirculation Loop Suction Valve with a LOCA Occurring Between the Loop Discharge and Suct | /01X-1 for Dresden, Units 2 and 3 Re NRC Request for Immediate Actions to Be Taken to Mitigate the Potential for a Spurious Closure of a Recirculation Loop Suction Valve with a LOCA Occurring Between the Loop Discharge and Suction Valves | |
05000010/LER-1978-028-03, /03L-0:on 780815,weekly Reactor Protection Sys Functional Operability Test Postponed But Not Rescheduled. Caused by Personnel Error.Personnel re-instructed Re Importance of Scheduled Surveillances.(Encl to 7809260056) | /03L-0:on 780815,weekly Reactor Protection Sys Functional Operability Test Postponed But Not Rescheduled. Caused by Personnel Error.Personnel re-instructed Re Importance of Scheduled Surveillances.(Encl to 7809260056) | |
05000010/LER-1978-028, Forwards LER 78-028/03L-0 | Forwards LER 78-028/03L-0 | |
05000237/LER-1978-029-03, Re Safety Implications Were Minimal Because 1 or More Operable APRMs Per Channel Remained Available as Required by TS 3.2 | Re Safety Implications Were Minimal Because 1 or More Operable APRMs Per Channel Remained Available as Required by TS 3.2 | |
05000237/LER-1978-030, /01T-0 for Dresden, Unit 2 Re Tech. Spec. 6.6.B.1(f), Personnel Error Which Prevents or Could Prevent, by Itself, the Fulfillment of the Functional Requirements of System Required to Cope with Accidents Analyzed in the SAR | /01T-0 for Dresden, Unit 2 Re Tech. Spec. 6.6.B.1(f), Personnel Error Which Prevents or Could Prevent, by Itself, the Fulfillment of the Functional Requirements of System Required to Cope with Accidents Analyzed in the SAR | |
05000237/LER-1978-030-01, /01X-1 on 780428:During Unit 2 Startup Opers, a LPCI & Core Spray Subsys Were Inadvertantly Rendered Inoper Because Personnel Had Closed LPCI Pump & Discharge Valves on Unit 2 Vice 3.(Encl to 7809180320) | /01X-1 on 780428:During Unit 2 Startup Opers, a LPCI & Core Spray Subsys Were Inadvertantly Rendered Inoper Because Personnel Had Closed LPCI Pump & Discharge Valves on Unit 2 Vice 3.(Encl to 7809180320) | |
05000237/LER-1978-031, /03L-0 for Dresden, Unit 2 Re PS-2-1430-1466C Failed to Operate | /03L-0 for Dresden, Unit 2 Re PS-2-1430-1466C Failed to Operate | |
05000237/LER-1978-032, /03L-0 for Dresden, Unit 2 Re During Steady State Operation, Torus to Drywell Vacuum Breaker 2-1601-33E & F Were Found Inoperable During Routine Operability Surveillance | /03L-0 for Dresden, Unit 2 Re During Steady State Operation, Torus to Drywell Vacuum Breaker 2-1601-33E & F Were Found Inoperable During Routine Operability Surveillance | |
05000249/LER-1978-032-03, /03L on 780817:room Cooler Fans Failed to Start When Pumps 3B & 3C started.4KV Switchgear 33 & 34 Auxiliary Contacts Were Found Dirty.(Encl to 7809220129) | /03L on 780817:room Cooler Fans Failed to Start When Pumps 3B & 3C started.4KV Switchgear 33 & 34 Auxiliary Contacts Were Found Dirty.(Encl to 7809220129) | |
05000249/LER-1978-032, Forwards LER 78-032/03L | Forwards LER 78-032/03L | |
05000010/LER-1978-033, Cancelled | Cancelled | |
05000237/LER-1978-033-03, /03X-1 on 780522:during Test Performed on U-2 D/G to Measure Overshoot & Overspeed Setpoint,The Diesel Tripped 4 Times Due to Overspeed Caused by Governor Speed Set Too High | /03X-1 on 780522:during Test Performed on U-2 D/G to Measure Overshoot & Overspeed Setpoint,The Diesel Tripped 4 Times Due to Overspeed Caused by Governor Speed Set Too High | |
05000237/LER-1978-033, Forwards LER 78-033/03X-1 | Forwards LER 78-033/03X-1 | |