05000293/LER-2002-001, High Pressure Coolant Injection System Inoperable Due to Fuse Failure on July 7, 2002
05000293/LER-2004-002, High Pressure Coolant Injection System Fuse Failure While System Inoperable for Planned Maintenance and Testing
05000278/LER-1983-002, Forwards LER 83-002/01T-0.Detailed Event Analysis Submitted
05000259/LER-1997-004, Forwards LER 97-004-00 Re Discovery of non-conservative TS Lco.Will Submit TS Change Request to NRC to Remove non- Conservatism
BECO-87-141, Application for Amend to License DPR-35 Revising 870601 Application to Change Tech Specs 3.5.C.1 & 3.5.D.1 to Specify,Quantitatively,Reactor Operating Conditions for Which HPCI & RCIC Required to Be Operable
B12626, Application for Amend to License DPR-21,revising Tech Spec Section 3.5.C Re Core & Containment Cooling Sys & Feedwater Coolant Injection Subsystem.Fee Paid
B17621, Application for Amend to License DPR-21,reflecting Permanently Defueled Condition of Unit 1,Tech Specs Administrative Controls Section as Allowed by Guidance Contained in NRC Administrative Ltr 95-06
B16152, Requests Withdrawal of Two License Amend Requests Re Jet Pumps & FW Coolant Injection Subsystem
BECO-93-016, Proposed TS 3.5.C,D & E Re k-infinity Factor,Spent Fuel Pool Storage Capacity & Max Loads Allowed to Travel Over Fuel Assemblies,Respectively
BECO-91-136, Application for Amend to License DPR-35,changing Tech Spec 3.5.D.2, RCIC Sys,Under Exigent Circumstances to Provide Limited Extension of 7-day LCO
05000333/LER-1989-002-01, :on 890302,HPCI Sys Declared Inoperable While Required by Tech Spec 3.5.C.1.Caused by Wiring Error That Existed Since Plant Const.Wiring Error Corrected & Stop Valve Opening Time Adjusted
05000333/LER-1989-005-01, :on 890412,HPCI Sys Made Inoperable to Find & Correct Grounded Electrical Circuit.Caused by Accumulation of Conductive Rust/Corrosion Products.Cleaning Provided Satisfactory Repair & Technical Manual Updated
05000260/LER-1989-011, :on 890404,RHR Svc Water Pump Room A-1 Sump Pump Declared Inoperable Due to Problem W/Level Switch Controlling Pump Operation.Caused by Sys Outages in Progress.Rhr Loop II Declared Operable
05000254/LER-1987-006-02, :on 870403,HPCI Inoperable Due to Loose Solenoid Soldered Connection.Caused by Excessive Tension on Leads of Coil & Normal Equipment Vibration.Failed Solenoid Valve Replaced & Wire Leads of Coil Lengthened
05000333/LER-1987-010, :on 870723,HPCI Inoperable Due to Low Auxiliary Oil Pump Discharge Pressure.Caused by Failure of Inboard Bearing in Auxiliary Oil Pump.Addl HPCI Turbine Parameters Will Be Monitored,Recorded & Trended
05000277/LER-1987-023-01, :on 871014,HPCI Sys Disabled Due to Blown Logic Fuse.Cause Unknown.Fuse Replaced within 5 Minutes.No Addl Corrective Actions Planned
05000277/LER-1987-020-01, :on 870904,HPCI Sys Determined Inoperable Due to Opening of Resistor in Voltage Dropping Assembly.Exact Cause for Opening of Resistor Unknown.Resistor Replaced on 870914
05000278/LER-1987-007-02, :on 870829,HPCI Rendered Inoperable Due to Loss of Instrument Power.Caused by Deteriorated Relay Coil.Relay Replaced & Added to Preventive Maint Program to Be Replaced on 6-yr Interval
05000277/LER-1987-022, :on 870929,HPCI Disabled Due to Blown Power Fuse in HPCI Logic Panel.Cause Unknown.Fuse Replaced within 35 Minutes,Static Inverter Placed on Ac Feed & Battery Terminal Voltage Monitored Every 4 H
05000296/LER-1986-009-03, :on 860908,Loop I of RHR Sys Declared Inoperable After Damaged Hanger Discovered.Caused by High Vibration in Shutdown Cooling Mode.Hanger Repaired & Design Mod Will Be Performed
05000254/LER-1986-034-02, On 861117,discovered Severe Packing Leak on HPCI Sys Steam Supply Valve.Caused by Normal Wear on Packing Ring.Old Packing Removed & Replaced w/17 Rings of New Packing
05000249/LER-1986-014-07, :on 860826,during Operating Surveillance 2300-6, Monthly HPCI Sys Pump Test for Inservice Test Program, HPCI Gland Seal Leak Off Drain Failed to Adequately Drain HPCI Condenser Hotwell
05000277/LER-1986-014-02, :on 860618,shutdown Initiated Due to Potential Loss of Emergency Svc Water (Esw).Caused by Need to Repair ESW Pipe Leak Occurring in Inlet to RHR Room Cooler 2A.Pipe Temporarily Repaired & Ultrasonically Tested
05000259/LER-1997-004-04, :on 971010,discovered That RHR Swp LCO Is non- Conservative.Caused by Error in Preparation & Approval of Original TS 3.5.C.Will Submit TS Change to NRC to Remove non-conservatism from TS 3.5.C
05000293/LER-1998-026, :on 981202,HPCI Sys Declared Inoperable.Caused by Failed Power Inverter.Failed Inverter Replaced. with
05000265/LER-1987-003-09, :on 870127,discovered That HPCI Motor Speed Changer Would Not Travel to High Speed Stop.Caused by Misadjustment of Relay 2330-105 7 & 8 Contacts.Contacts Adjusted to within Proper Gap Settings
05000254/LER-1987-006-08, :on 870403,HPCI Sys Inoperable.Caused by Loose Soldered Connection on Solenoid Valve Coil SV-8.Solenoid Coil Replaced & HPCI Turbine Remote Reset Verified.Solenoid Valves SV-8 & SV-12 Replacement Planned
05000333/LER-1988-001, :on 880310,HPCI Turbine Steam Supply Valve Failed to Open in Response to Open Signal.Caused by Procedures Not Including Evaluation of Relubrication of Threads of Valve Stem & Stem Nut
05000333/LER-1988-002, :on 880310,RCIC Made Inoperable for Approx 1 Minute Due to Automatic Closure of Steam Supply Valve While HPCI Inoperable.Caused by Failure to Follow Procedures.Rcic Restored to Svc
05000333/LER-1988-001-01, :on 880310,HPCI Turbine Steam Supply Valve 23-MOV-14 Failed to Open During Surveillance Testing.Caused by Destruction of Commutator in Motor Due to Excessive Current.Failed Motor Replaced
05000296/LER-1986-004, :on 860125,Tech Spec 3.5.C.7 Re Availability of Normal & Emergency Power Violated When RHR Loop II & Diesel Generators Removed from Svc.Personnel Counseled & Tech Spec Clarification Proposed
05000271/LER-1996-006, :on 960214,potentially Inoperable RHR Svc Water Valves Noted.Caused by mfg-fabrication Deficiency.Priority Work Orders Written to Inspect & Torque Bolts on Valves.W/
05000249/LER-1985-016-07, :on 850826,equipment Attendant Observed HPCI Room Cooler Fan Breaker Emitting Smoke.Caused by Shorted Motor Contactor Coil.Coil & Auxiliary Contacts Replaced & Maint Procedure DMP 7300-5 Performed
05000265/LER-1993-002, :on 930113,nuclear Station Operator Tripped Turbine & Noticed Motor Speed Charger Light Indication Remained Lit at High Speed Stop.Caused by Dirty Contacts in Pressure Switch.Hpci Declared Inoperable
05000265/LER-1993-003, :on 930111,NSO Discovered That No Light Indication Existed for HPCI Motor Gear Unit,Speed Changer & Stop Valve.Caused by Cocked Saddle on Terminal Block Aa,Fuse f-12.Saddle Straightened for Three Fuses
05000265/LER-1992-018, :on 920529,HPCI Sys Manuually Isolated Due to Inadequate Procedure.Caused by Spurious HPCI High Area Temp Alarm.Temp Switches Calibr & Functionally Tested
05000265/LER-1984-014-07, :on 840919,HPCI Isolation Occurred.Caused by Small Intermittent Leak from Steam Seal on HPCI Turbine. HPCI Isolation Reset
05000333/LER-1985-001, :on 850104,HPCI Steam Supply Isolation Valve Breaker Alarm Relay Failed.Necessary Repairs Resulted in HPCI Sys Being Declared Inoperable for 2 1/2 H.Caused by Faulty Dc Coil
05000254/LER-1995-008-08, :on 951206,HPCIS Declared Inoperable When HPCI Turbine Stop Valve Failed to Open within Acceptable Range of IST Program Due to Loose Connections & Fouled Limit Switch Contacts.Request for PM Initiated
05000259/LER-1984-029-01, :on 840720,24 H Limiting Condition for Operation Entered When ASME Section XI Pump Pressure Criteria Not Met for Four RHR Svc Water Pumps.Tech Spec Flow Met,But Pumps Declared Inoperable
05000265/LER-1995-008-06, :on 951018,HPCI Speed,Flow & Discharge Pressure Oscillations Inlet Design Drain Pot High Level Alarm Occurred & Failure of Valve 2-2301-28.Cause Under Investigation
05000263/LER-1995-007-01, :on 951012,valve RHR 74-2 Found Closed & Unlocked.Caused by Personnel Errors.Event Discussed W/Shift Personnel & Formal Training Will Be Provided to Personnel Involved in Valve line-ups
05000333/LER-1984-012, :on 840518,while Operating at Full Power,Rcic & HPCI Sys Found Inoperable,Contrary to Tech Specs.Rcic Failure Due to Malfunction in Isolation Circuitry.Hpci Failure Due to Stop Valve Stem Cracking
05000265/LER-1991-006-02, :on 910420,HPCI Pump Failed to Meet Inservice Testing Pump Surveillance Acceptance Criteria.Caused by Inadequate Procedures.Procedures Revised
05000254/LER-1984-001-05, :on 840305,reactor Shutdown Initiated Due to HPCI Pump Lubrication Oil Being Containment W/Water & Electromatic Relief Valve 1-203-3E Failing to Open When Given Manual Signal.Caused by Leak
05000333/LER-1984-003, :on 840207,while HPCI Intentionally Out of Svc for Maint & Mod,Rcic Sys Declared Inoperable.Caused by Personnel Error.Personnel Counseled & Training Program Implemented
05000265/LER-1991-011-06, :on 911015,HPCI Gland Seal Hotwell Pump Observed to Be Cycling on & Off & Sys Declared Inoperable. Caused by High Level Switch for Pump Slipping Out of C-clip. Switch Repaired & Sys Succesfully Tested
05000293/LER-1991-003, :on 910307,HPCI Sys Made Inoperable When Two HPCI Turbine Steam Exhaust Vacuum Breaker Containment Isolation Valves Discovered Closed.Caused by Loss of Fill Oil in Transmitter.Transmitter Replaced
05000333/LER-1995-008, :on 950326,HPCI Sys Tripped on Overspeed Due to Procedure Deficiency.Adjusted HPCI Flow Controller Output Current Limits to Limit Saturation of Controller
05000254/LER-1995-004-04, :on 950329,HPCI Sys Declared Inoperable from Motor Speed Changer Malfunction Due to Limit Switch Failure. Updated Plant Vendor Technical Manuals to Reflect Guidance for Installation & Adjustment of GE Limit Switches
05000265/LER-1991-010-05, :on 910907,HPCI Sys Declared Inoperable Due to Broken Room Cooler Belt.Caused by Normal Wear.Belt Replaced, Tension Adjusted & Alignment Checked & Belts on All Room Coolers Replaced Every Refueling Outage
05000254/LER-1994-008-07, :on 940820,unit 1 Reactor Was Manually Scrammed by Procedure to Achieve Shutdown Condition Required by Tss. Caused by Work Practices Associated W/Crimping Terminal Lug. Wire Terminal Lugs Were Replaced W/New Parts
05000254/LER-1994-007-03, :on 940321,HPCI Restricting Orifice (RO) Found Clogged Approx 95% Closed.Cause of Clogged RO Unknown.Steam Line Drain ROs & Steam Traps on Unit 2 HPCI & RCIC Sys Disassembled & Inspected
05000254/LER-1989-022, :on 891128,unit 1 High Pressure Coolant Injection Sys Declared Inoperable Following Unexpected Actuation of HPCI Pump Room Deluge Sys.Cause Unknown. Procedure Revised & Operator Trained
05000265/LER-1991-001-01, :on 910102,severe Packing Leak on HPCI Turbine Steam Supply Isolation Motor Operated Valve Discovered. Caused by Steam Cut on Valve Stem.Valve Repacked & Stem to Be Repaired &/Or Replaced
05000265/LER-1990-012-08, :on 901124,automatic Function of HPCI Pump Flow Indicating Controller (FIC) 2-2340-1 Failed Due to Unknown Causes.Hpci Declared Inoperable & Sys Outage Rept Initiated
05000333/LER-1994-001, :on 940224,HPCI Sys Had Declared Inoperable Due to Turbine Shaft Seal Leakage.Caused by Corrosion of Gland Seal Casing & Pitting.New Turbine Shaft Seals Installed.W/
05000333/LER-1994-001-01, :on 940224,HPCI Sys Declared Inoperable Due to Minor Corrosion on Gland Seal Casing & Pitting of Turbine Shaft in Seal Area.New Turbine Shaft Seals Installed
05000277/LER-1982-039-03, /03L-0:on 821126,HPCI Flow Controller Read Approx 80% Instead of 100%.Caused by Faulty Amplifier Card in Flow Controller.Flow Controller Replaced & HPCI Sys Tested & Returned to Svc
05000277/LER-1978-037-03, /03L-0 on 780901:while Testing ADS Subsys,Timers on Both Loops Were Found Outside the 115-125 Second Limit of Tech Specs Due to Setpoint Drift of Time Delay Relays. Timers Were Calibrated,Retested & Returned to Svc
05000293/LER-1994-001, :on 940104,HPCIS Became Inoperable & Seven Day TS 3.5.C.2 LCO Entered Due to Unplanned Isolation During Surveillance Testing.Caused by False Low Rv Pressure Signal. Calibr Unit Replaced & Hpcis Declared Operable
05000321/LER-1981-123-03, /03L-0:on 811112,w/reactor in Shutdown for Core Reconstitution,High Bearing Temp Alarm Received in a RHR Svc Water Pump Motor.Caused by Mud & Sludge Buildup in Cooling Water Line.Mud & Sludge Removed
05000277/LER-1978-044-03, /03L-0 on 781021:during Startup,Excessive Oper of HPCI Gland Seal Condensate Pump Was Noted.Check Valve 2-23-131 Was Leaking Which Let Condensate Return to Gland Seal Condenser.Valves Were Blocked to Facilitate Repair
05000265/LER-1990-009-08, :on 900915,HPCI Declared Inoperable Due to Failure of Gland Seal Hotwell Pump
B14692, Forwards Response to NRC Re Two Alleged Violations of Requirements Identified in Connection W/Insp Rept 50-245/90-01 & Investigation Rept 1-90-008.Proprietary Rept PED-12-0388 Withheld (Ref 10CFR2.790(a)(6))
05000265/LER-1982-010-03, /03L-0:on 820624,motor Operated Valve MO-2301-8 Would Not Open When Given Open Signal During HPCI Sys Valve Inoperability Surveillance,Qos 2300-3,rendering HPCI Inoperable.Caused by Broken Arm in Open Torque Switch
05000293/LER-1993-016, :on 930719,HPCI Sys Declared Inoperable.Caused by Depiction & Description of Field Common Connections on Panalarm Co Drawing.Field Common for Alarm Circuit re-established & Tested
05000254/LER-1993-011-03, :on 930721,discovered That 4kV Breaker 68 Feeding CS 1B Motor Pump Open & Discharged,Resulting in CS 1B Being Declared Inoperable.Wr Written to Investigate & Repair
05000254/LER-1993-010-04, :on 930720,HPCI Declared Inoperable & HPCI Outage Rept Qcos 2300-2 Initiated Because IST Flow Rate Fell in IST Required Action Range Due to New Procedure. Surveillance Procedure Will Be Revised
05000293/LER-1993-015, :on 930630,HPCI Sys Declared Inoperable Due to Indicated Flow During Surveillance.Caused by Foreign Matl That Plugged Portion of Restricting Orifice.Restricting Orifice Removed,Cleaned & Reinstalled
05000271/LER-1993-008, :on 930701,discovered That During Previous Surveillance Testing on 910515,pump Differential Pressure Entered IST Required Action Range Due to Personnel Error. Plant Procedure AP 0164 Will Be Revised
05000254/LER-1993-005-05, :on 930609,numerous Alarms Received in CR, Including HPCI Turbine Rupture Disc High Pressure Alarm. Caused by Ruptured Disk,Releasing Steam/Water Mixture. Test Will Be Conducted on Rupture Disks
05000333/LER-1993-010-01, :on 930420,HPCI Declared Inoperable Due to Grounded Electric Circuit on Turbine Steam Supply Valve. Caused by Personnel Inattention to Detail.Personnel Counseled Re Need for Attention to Detail
05000298/LER-1993-015, :on 930420,design Discrepancy in HPCI Sys Identified.Caused by Design Deficiency in Original Design. Mods Will Be Made to Startup from Current Refueling Outage to Correct Design Discrepancy
05000254/LER-1993-001-07, :on 930204,determined That Ccst Low Water Level & Torus High Water Level Switch Contacts Not Functionally Tested Due to Missed TS Sr.Maint Personnel Will Revise Check Valve Disassembly to Ensure Proper Alignment
05000321/LER-1981-097-03, /03L-0:on 810909,during Steady State Operation, RHR Svc Water Pumps E11-C001A,B & D Failed to Meet Rated Flow & Sys Head Requirements.Caused by Excessive Seal Water Leakage or Pump Wear.Pumps Rebuilt or Replaced
05000245/LER-1989-022, :on 891117,engineering Analysis Indicated That Feedwater Coolant Injection Sys May Be Required to Deliver Flow in Excess of Flow Pump Capabilities During Loca.Sys Declared Inoperable.Design Change Initiated
05000331/LER-1981-025-03, /03L-0:on 810616,RHR B Svc Water Pump Did Not Develop Required Discharge Pressure at Rated Flow.Caused by Normal Wear Creating Excessive Clearances Between Impeller & Casing Rings.Impellers Adjusted
05000254/LER-1989-022-02, :on 891128,HPCI Declared Inoperable Following Unexpected Actuation of HPCI Pump Room Deluge Sys.Actuation Caused Dc Sys Grounds Due to Moisture Intrusion in Electrical Equipment.Equipment Dried
05000265/LER-1981-003-01, /01T-0:on 810202,outboard Steam Isolation Valve MO-2-2301-5 Closed But Would Not Reopen.Caused by Insufficient Torque in Hot Condition to Lift Valve.Valve Limit Switches Adjusted
05000265/LER-1981-003, Forwards LER 81-003/01T-0.Detailed Event Analysis Also Encl
05000333/LER-1980-085-01, /01T-0:on 801208,HPCI Steam Supply Outside IV Operator Motor Failed.Caused by Mechanical Failure of Torque Switch Assembly.Motor Rewound & Assembly Parts Replaced
05000333/LER-1981-020-03, /03L-0:on 810213,during Normal Operation,Hpci Controller Indicated Possible Controller Failure.Sys Declared Inoperable.Caused by Failure of Two Transistors in Amplifier.Controller Replaced & Returned to Svc
05000333/LER-1989-021, :on 891031,circuit Breaker for RCIC Inboard Injection Valve to Feedwater Sys Tripped During Required Valve Testing.Caused by Fault in Motor Winding Insulation. New Motor Installed
05000265/LER-1980-014-03, /03L-0:on 800623,during Surveillance Check on HPCI Emergency Oil Pump,Found Oil Leak on Discharge Line.Caused by Cracked Threads on Pipe Nipple.Pipe Nipple Cut & Rethreaded
05000333/LER-1980-024-03, /03L-0:on 800213,during Normal Operation,Hpci Steam Isolation Valve Closed Due to Spurious Operation Signal.Caused by Loose Wire within Thermocouple Switch Associated W/High Area Temp Isolation Logic.Wire Fastened
05000249/LER-1988-005-03, :on 880326,HPCI Sys Made Inoperable to Facilitate Preplanned Preventive Maint Testing.Caused by Mgt Decision to Perform Preventive Maint Testing of HPCI Turbine Overspeed Trip Sys.Hpci Tripped on 5,015 Rpm
05000293/LER-2013-006, And LER 13-006-00 for Pilgrim Regarding Primary Containment Declared Inoperable During HPCI Testing & HPCI Controller Failure to Achieve Rated Flow While in Auto Mode
05000293/LER-2011-006, HPCI Turbine Governor Control Valve Failure
05000331/LER-1981-007-03, /03L-0:on 810219,during Normal Operation,Pressure Differential Across RHR Svc Water Strainer 1S-90B Read High, Resulting in Loop B Inoperability.Caused by Sand Plugged in Strainer Mesh.Strainer Cleaned
05000293/LER-2008-005, HPCI System Declared Inoperable During Surveillance Testing Due to Human Error
05000293/LER-2008-004, Regarding High Pressure Coolant Injection System Inoperable Due to Undervoltage Relay Failure in Valve Power Supply Circuit
BVY 05-030, Technical Specification Proposed Change No. 263 - Supplement No. 25, Extended Power Uprate - Station Blackout and Appendix R Analyses
05000293/LER-2005-001, Regarding High Pressure Coolant Injection System Inoperable Due to Fuse Failure in Motor Operated Valve Control Power Circuit
05000237/LER-1989-029-05, Elevated HPCI Discharge Piping Temperature Due to Reactor Feedwater System Back Leakage
05000254/LER-1993-011-02, :on 930721,discovered That 4KV Breaker 68, Feeding 1B Core Spray Pump Motor Was Open & Discharged Due to Personnel Error.Procedure Change Has Been Processed to Standardize Window Colors Part of PM Program
05000265/LER-1982-017-03, /03L-0:on 821001,small Leak Discovered in HPCI Sys Supply Steam Line Break Flange.Caused by Failed Flange Gasket.Gasket Replaced like-for-like During & Prior to Outage.Leakage Stopped W/Flange Bolt Adjustments
05000254/LER-1991-012, :on 910507,HPCI Turbine Stop Valve Failed to Stroke Fully Open During Manual Initiation Test.Caused by Long Bushing in Stuffing Box of Stop Valve Sliding Down. Stuffing Boxes,Bushings & Pins Replaced
05000249/LER-1981-025-01, During Automatic Depressurization Sys Valve Operability Surveillance,B Electromatic Relief Valve Failed to Open at Rated Pressure. Caused by Excessive Leakage on Threads
05000265/LER-1993-011-02, :on 930602,HPCI Declared Inoperable in Order to Perform Qcos 2300-13.Caused by MSC Stem & Stem Gear Being Scored & Worn from Age Causing Excessive Friction.C/As Include Disassembling Gearbox Every 10 Yrs