05000317/LER-1984-001, :on 840113,post-accident Sampling Sys Return to Reactor Coolant Drain Tank Isolation Valve Discovered Open.Cause Unknown.Key Switches for Valve Modified

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:on 840113,post-accident Sampling Sys Return to Reactor Coolant Drain Tank Isolation Valve Discovered Open.Cause Unknown.Key Switches for Valve Modified
Person / Time
ML20080R099
Site:	Calvert Cliffs
Issue date:	02/10/1984
From:	Lohr J, Russell L BALTIMORE GAS & ELECTRIC CO.
To:	Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
LER-84-001, LER-84-1, NUDOCS 8402280113
Download: ML20080R099 (4)
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v t e Similar Documents at Calvert Cliffs
Category:LICENSEE EVENT REPORT (SEE ALSO AO RO) MONTHYEAR1999-09-20 [Table view] Category:TEXT-SAFETY REPORT MONTHYEAR1999-09-30 [Table view]

LER-1984-001, on 840113,post-accident Sampling Sys Return to Reactor Coolant Drain Tank Isolation Valve Discovered Open.Cause Unknown.Key Switches for Valve Modified

Event date:
Report date:
3171984001R00 - NRC Website
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Licensee Event Report

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		Reporting criterion
05000317/LER-1984-001, :on 840113,post-accident Sampling Sys Return to Reactor Coolant Drain Tank Isolation Valve Discovered Open.Cause Unknown.Key Switches for Valve Modified	on 840113,post-accident Sampling Sys Return to Reactor Coolant Drain Tank Isolation Valve Discovered Open.Cause Unknown.Key Switches for Valve Modified
05000318/LER-1984-001-01, :on 831005,1220 & 840203,ECCS Pump Room Ventilation Sys Exhaust Fan Discharge Damper 21 Would Not Open.Caused by Air Supply to Exhaust Fan Discharge Damper Isolated.Air Restored & Sys Returned to Svc	on 831005,1220 & 840203,ECCS Pump Room Ventilation Sys Exhaust Fan Discharge Damper 21 Would Not Open.Caused by Air Supply to Exhaust Fan Discharge Damper Isolated.Air Restored & Sys Returned to Svc
05000318/LER-1984-002-01, :on 840313 & 22,condenser off-gas Radiation Monitor 2-RI-1752 Declared Inoperable & Grab Sample Not Taken During Period.Caused by Disconnected Connector Due to Improperly Functioning Bayonet Clasps	on 840313 & 22,condenser off-gas Radiation Monitor 2-RI-1752 Declared Inoperable & Grab Sample Not Taken During Period.Caused by Disconnected Connector Due to Improperly Functioning Bayonet Clasps
05000317/LER-1984-002, :on 840127,reactor Tripped & All Eight Reactor Trip Breakers Opened Simultaneously.Root Cause Unknown. Independent Sys Failure Evaluation Will Be Performed	on 840127,reactor Tripped & All Eight Reactor Trip Breakers Opened Simultaneously.Root Cause Unknown. Independent Sys Failure Evaluation Will Be Performed
05000318/LER-1984-003, :on 840415,automatic Trip of Reactor Occurred Due to Low Reactor Coolant Flow Condition,Resulting from Loss of Reactor Coolant Pump 22b.Caused by Internal Short to Ground in Surge Capacitor	on 840415,automatic Trip of Reactor Occurred Due to Low Reactor Coolant Flow Condition,Resulting from Loss of Reactor Coolant Pump 22b.Caused by Internal Short to Ground in Surge Capacitor
05000317/LER-1984-003-01, :on 840123,technicians Violated Tech Specs by Opening Containment Isolation Valves 1-SV-6540-G & 1-SV-6507-G During Operational Maint Check.New Procedure Written & Tech Spec Amend Submitted	on 840123,technicians Violated Tech Specs by Opening Containment Isolation Valves 1-SV-6540-G & 1-SV-6507-G During Operational Maint Check.New Procedure Written & Tech Spec Amend Submitted
05000317/LER-1984-004-01, Updated LER 84-004-01:on 840228,charging Pumps 12 & 13 Taken Out of Svc Due to Excessive Packing Leakage.Caused by Plunger Packing Failure.Evaluation of Alternative Charging Pump Packing Matls in Progress	Updated LER 84-004-01:on 840228,charging Pumps 12 & 13 Taken Out of Svc Due to Excessive Packing Leakage.Caused by Plunger Packing Failure.Evaluation of Alternative Charging Pump Packing Matls in Progress
05000318/LER-1984-004, :on 840421,during Surveillance test,13 of 16 Main Steam Safety Valve Setpoints Found Out of Tolerance. Setpoints Recalibr Prior to Test Completion.Frequency of Test Increased	on 840421,during Surveillance test,13 of 16 Main Steam Safety Valve Setpoints Found Out of Tolerance. Setpoints Recalibr Prior to Test Completion.Frequency of Test Increased
05000317/LER-1984-005, :on 840502,through-wall Hole Occurred During Removal of Graphite Layer on Component Cooling HX 22.Second Hole Created on 840503.All Units 1 & 2 Saltwater Pumps Inoperable on 840514.Cause Unknown	on 840502,through-wall Hole Occurred During Removal of Graphite Layer on Component Cooling HX 22.Second Hole Created on 840503.All Units 1 & 2 Saltwater Pumps Inoperable on 840514.Cause Unknown
05000318/LER-1984-005, :on 840426,diesel Generators 12 & 21 Inoperable Simultaneously.Caused by Personnel Error.List of Equipment Required to Maintain Diesel Generator Operability Prepared & Operators Will Be Trained on Event Condition	on 840426,diesel Generators 12 & 21 Inoperable Simultaneously.Caused by Personnel Error.List of Equipment Required to Maintain Diesel Generator Operability Prepared & Operators Will Be Trained on Event Condition
05000318/LER-1984-006-01, :on 840709,while in Mode 1,unidentified Reactor Coolant Leakage Determined Greater than 1.0 Gpm.Caused by Inservice Fatigue Induced Cracked Weld.Defective Section of Control Bleedoff Pipe Replaced	on 840709,while in Mode 1,unidentified Reactor Coolant Leakage Determined Greater than 1.0 Gpm.Caused by Inservice Fatigue Induced Cracked Weld.Defective Section of Control Bleedoff Pipe Replaced
05000317/LER-1984-006, :on 840531,axial Power Distribution Pretrip Alarm Occurred on Channel a of Reactor Protection Sys.Caused by Disconnected Signal Lead from Upper Detector.Procedure Changes & Review of Event Will Be Accomplished	on 840531,axial Power Distribution Pretrip Alarm Occurred on Channel a of Reactor Protection Sys.Caused by Disconnected Signal Lead from Upper Detector.Procedure Changes & Review of Event Will Be Accomplished
05000317/LER-1984-007, :on 840724,during Monthly Surveillance Test of ESF Actuation Sys,Power Lost on 4,160-volt Emergency Bus. Caused by Personnel Inadvertently Depressing Incorrect Test Button.Bus Reenergized.Button Relabeled	on 840724,during Monthly Surveillance Test of ESF Actuation Sys,Power Lost on 4,160-volt Emergency Bus. Caused by Personnel Inadvertently Depressing Incorrect Test Button.Bus Reenergized.Button Relabeled
05000318/LER-1984-007-01, :on 840824,PORV Override Handswitches Found in Override Position Rendering PORVs Inoperable.Caused by Procedural Inadequacy.Tech Specs Will Be Revised Re Operating Procedures	on 840824,PORV Override Handswitches Found in Override Position Rendering PORVs Inoperable.Caused by Procedural Inadequacy.Tech Specs Will Be Revised Re Operating Procedures
05000317/LER-1984-008, :840808,battery 21 Declared Inoperable Due to Electrolyte Levels Above High Level Mark for 50% of Battery Cells.Caused by Expansion of Electrolyte During Equalize Charge.Test Procedure Changed	840808,battery 21 Declared Inoperable Due to Electrolyte Levels Above High Level Mark for 50% of Battery Cells.Caused by Expansion of Electrolyte During Equalize Charge.Test Procedure Changed
05000318/LER-1984-008-01, :on 841003,automatic Trip Occurred Due to Steam Generator Feed Pump (SGFP) 22 Trip.Possibly Caused by Spurious Fault in Common SGFP Control Circuitry.Sgfp Control Oil & Lube Oil Sys Checked	on 841003,automatic Trip Occurred Due to Steam Generator Feed Pump (SGFP) 22 Trip.Possibly Caused by Spurious Fault in Common SGFP Control Circuitry.Sgfp Control Oil & Lube Oil Sys Checked
05000317/LER-1984-009, :on 840828,manual Trip Occurred.Caused by Loss of Circulating Water Due to Clogging of Four Traveling Water Screens W/Fish.Evaluation of Methods for Minimizing Clogging of Screens Underway	on 840828,manual Trip Occurred.Caused by Loss of Circulating Water Due to Clogging of Four Traveling Water Screens W/Fish.Evaluation of Methods for Minimizing Clogging of Screens Underway
05000317/LER-1984-010, :on 840829,quarterly Surveillance Testing of 125 Volt Dc Batteries Found Not Performed.Batteries Declared Inoperable.Caused by Personnel Error.Test Scheduling Sys Being Developed	on 840829,quarterly Surveillance Testing of 125 Volt Dc Batteries Found Not Performed.Batteries Declared Inoperable.Caused by Personnel Error.Test Scheduling Sys Being Developed
05000317/LER-1984-011, :on 840830,surveillance Test Procedure on Diesel Generators 11 & 12 Not Performed Per Tech Spec Requirements.Caused by Personnel Error.Test Procedure Will Be Revised to Clarify Required Testing	on 840830,surveillance Test Procedure on Diesel Generators 11 & 12 Not Performed Per Tech Spec Requirements.Caused by Personnel Error.Test Procedure Will Be Revised to Clarify Required Testing
05000317/LER-1984-012, :on 840922 & 23,main Vent Particulate Monitor Out of Svc During Waste Gas Decay Tank Release.Caused by Inoperable Paper Drive & Personnel Error.Operators Instructed	on 840922 & 23,main Vent Particulate Monitor Out of Svc During Waste Gas Decay Tank Release.Caused by Inoperable Paper Drive & Personnel Error.Operators Instructed
05000317/LER-1984-013, :on 841002,manual Trip Occurred.Caused by Imminent Loss of Circulating Water Due to Clogging of Traveling Water Screens W/Sea Nettles.Evaluation of Alternative Screens Pursued	on 841002,manual Trip Occurred.Caused by Imminent Loss of Circulating Water Due to Clogging of Traveling Water Screens W/Sea Nettles.Evaluation of Alternative Screens Pursued
05000317/LER-1984-014, :on 841024,during Surveillance Testing on Battery 21,individual Cell Voltage for Cell 1 Below Tech Spec Limits.Caused Not Stated.Cell Replaced & Battery 21 Returned to Svc	on 841024,during Surveillance Testing on Battery 21,individual Cell Voltage for Cell 1 Below Tech Spec Limits.Caused Not Stated.Cell Replaced & Battery 21 Returned to Svc
05000317/LER-1984-015, :on 841120,reactor Trip Occurred.Caused by Imminent Loss of Circulating Water Due to Clogging of 8 of 12 Traveling Water Screens W/Fish.Methods for Minimizing Fish Impingement Being Pursued	on 841120,reactor Trip Occurred.Caused by Imminent Loss of Circulating Water Due to Clogging of 8 of 12 Traveling Water Screens W/Fish.Methods for Minimizing Fish Impingement Being Pursued
05000317/LER-1984-016, :on 841215,during Performance of Surveillance Test STP-0-67,HPSI Sys Injection Leg Flows Outside Tech Spec Requirement.Caused by Improperly Set Limit Switches.Switches Adjusted	on 841215,during Performance of Surveillance Test STP-0-67,HPSI Sys Injection Leg Flows Outside Tech Spec Requirement.Caused by Improperly Set Limit Switches.Switches Adjusted
05000317/LER-1984-017, :on 841226,channel a Linear Range Nuclear Instrument Lower Subchannel Pegged Low & Channel B Variable Overpower Trip Calculator Malfunctioned.Caused by Defective Lower Subchannel Connector	on 841226,channel a Linear Range Nuclear Instrument Lower Subchannel Pegged Low & Channel B Variable Overpower Trip Calculator Malfunctioned.Caused by Defective Lower Subchannel Connector
05000317/LER-1984-018, :on 841203,MSIV Inoperable.Caused by Oil Leakage from Piston Rod Seal & Damaged Actuator Overall Piston Seals.Seals Replaced	on 841203,MSIV Inoperable.Caused by Oil Leakage from Piston Rod Seal & Damaged Actuator Overall Piston Seals.Seals Replaced
05000317/LER-1984-019, :on 841212,MSIV Failed to Fully Close During Surveillance Testing.Caused by Faulty Contacts in Control Room Handswitch.Contacts,Restrictor Valves & Solenoid Pilot Valves Replaced	on 841212,MSIV Failed to Fully Close During Surveillance Testing.Caused by Faulty Contacts in Control Room Handswitch.Contacts,Restrictor Valves & Solenoid Pilot Valves Replaced

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