05000483/LER-1987-028, :on 871003,personnel Failed to Maintain Continuous Firewatch for Blocked Open Fire Door Upon Hearing Misinterpreted Fire Alarm.Caused by Personnel Error.Training Program Revised
05000454/LER-1987-020-03, :on 870902,contractor Assigned Continuous Fire Watch Left Assigned Watch Area to Rept for Whole Body Count Processing.Caused by Cognitive Personnel Error.Personnel Given Sheet Listing Responsibilities
05000454/LER-1987-011-03, :on 870415,auxiliary Feedwater Pump Room Sys Inoperable.On 870416,vapor Pilot Valve Discovered Closed.On 870404,vapor Pilot Valve Demonstrated Open During Inadvertent CO2 Actuation Event.Cause Unknown
05000482/LER-1987-016, :on 870409,continuous Fire Watch Not Maintained in ESF Switchgear Room 2 Per Tech Spec 3.7.10.3.a.Caused by Failure to Properly Instruct Fire Watch Personnel.Supervisor & Individual Involved Reprimanded
05000456/LER-1987-006-01, :on 870120,hourly Fire Watch Patrols Not Performed in Essential Svc Water Pump Room.Caused by Failure of Personnel to Recognize That Path Had Been Left to Complete Patrol.Personnel Reinstructed
05000456/LER-1986-001-01, :on 861021-1202,inoperable Fire Suppression Sys Led to Imposition of Continuous Fire Watch.Incidents of Inattentiveness,Confusion,Or Miscommunication Among Fire Watch Patrolmen Led to Dismissal or Retraining
05000456/LER-1986-003-09, :on 861121,hard Rubber Fire Hoses Declared Inoperable Due to Lack of Valid,Current Hydrostatic Test. Caused by Hose Failure Due to Improper Coupling for Intended Use.Hoses Replaced.Personnel Counseled
05000482/LER-1986-067, :on 861124,discovered Fire Damper Verification Not Performed as Required by Tech Spec Surveillance Requirement 4.7.10.3.b.Caused by Personnel Error.Fire Watches Established Until Completion of Tests
05000454/LER-1986-016-03, :on 860527,following Installation of Backup Electrical Power Supply,Continuous Fire Watch Inadvertently Released from Post.Caused by Personnel Error.Engineer Instructed on Fire Watch Procedures
05000456/LER-1987-020, :on 870312,fire Zone Detection & Suppression Annunciator Capability Failed.Caused by Failure of Bearing in Power Supply Cooling Fan.Fire Watches Established & Panel Power Supply & Cooling Fan Repaired
05000482/LER-1986-048, :on 860912,violation of Tech Spec 3.7.10.3 Re Halon Sys Occurred.Caused by Cognitive Personnel Error. Std Work Instructions Applicable to Halon Storage Tanks Revised
05000369/LER-1988-022-01, :on 880922,during Fire Protection Audit, Discovered That Hourly Fire Watch Not Performed on 870528- 0603 for Inoperable Halon Fire Suppression Sys.Caused by Personnel Error.New Damper Plate Installed
05000482/LER-1987-057, :on 871221,Tech Spec Violation Occurred Due to Failure to Fully Understand Requirements for Fire Watch. Caused by Personnel Error.Fire Protection Employee Retrained & Procedure Revised
05000413/LER-1985-058, :on 851008,hourly Fire Watches for Nine Fire Detection Zones Performed Approx 30 Minutes Late.Caused by Lack of Formalized Program to Document Post Assignments or Changes in Assignments.Patrols Performed
05000413/LER-1985-062, :on 851104-05,continuous Fire Watch Not Conducted on Diesel Generator 1B While Low Pressure Cardox Fire Protection Sys Disabled.Caused by Miscommunication Between Security & Maint Personnel
05000272/LER-1985-009-01, :on 850913,fire Watch Left Post While Automatic Actuation Feature for Diesel Low Pressure Fire Suppression Sys Defeated for Diesel Maint.Caused by Poor Coordination Between Maint & Operations Shift Supervisors
05000413/LER-1985-072, :on 851226,hourly Firewatch for Diesel Generator Room 1B & Auxiliary Feedwater Pump Room Posted 21 & 2 Minutes Late,Respectively.Caused by Malfunctioning Computer Sys Multiplexer.Procedures Written
05000413/LER-1985-070, :on 851217,hourly Fire Watch for Diesel Generator Room 1B Performed 51 Minutes Late While Carbon Dioxide Sys out-of-svc.Caused by Malfunction in Computer Controlling Computer Access Door Keys
05000320/LER-1982-018-03, /03L-0:on 820601,air Intake Tunnel Halon Sys Triggered Actuation of Deluge Sys & Tripped Auxiliary & Fuel Handling Bldgs Supply & Exhaust Fans.Caused by Lightning Setting Off Ultraviolet Light Detector.Sys Recharged
05000413/LER-1990-020, :on 900324,low Pressure Indication Noted on Cardox Carbon Dioxide Storage Unit & Continuous Fire Watch Not Provided within 1 H.Caused by Personnel Lack of Attention to Detail.Fire Watch Established
05000369/LER-1981-110, Forwards LER 81-110/03L-0.Detailed Event Analysis Encl
05000320/LER-1983-031-03, /03L-0:between 830721 & 0805,air Intake Tunnel Halon Svs Partially Disarmed on Four Occasions to Protect Sys from lightning-induced Spurious Halon Discharges.Louvers Being Installed
05000320/LER-1983-015-03, /03L-0:on 830527,one Halon Bottle Found W/Low Pressure & Low Weight During Surveillance of Air Intake Tunnel Halon Sys.Caused by Development of Leak in Bottle or Fittings.Bottle Replaced
05000320/LER-1983-014-03, Air Intake Tunnel Halon Sys Actuated,Causing Actuation of Deluge Sys & Trip of Auxiliary & Fuel Handling Bldgs Supply & Exhaust Fans.Caused by Short in Actuation Leads.Sys Repaired
05000456/LER-1987-006-03, :on 870120,4 H Fire Watch Patrol Detained by Radiation Chemistry Personnel Due to Not Signing Latest Radiation Work Permit & on 870131,did Not Start Route.Caused by Personnel Error.Personnel Retrained
05000311/LER-1987-006-01, :on 870506,individual Established to Act as Fire Watch for Continuous Monitoring of Ek & DC Areas Provided Inadequate Fire Watch.Caused by Personnel Error. Administrative Controls for Work Reviewed
05000311/LER-1987-009, :on 871125,util Task Force Examining Compliance w/10CFR50,App R Found Inadequacies Re RHR Room Coolers & Control Cablings.Caused by Inadequate Design Review.Design Change Mods Being Made
05000320/LER-1987-011-01, :on 871123,Halon Sys Remained Out of Svc Following Completion of Surveillance Per Tech Spec 3.7.10.3 W/O Continuance of Fire Watch.Caused by Personnel Error.Sys Returned to Svc & Personnel Counseled
05000483/LER-1987-011, :on 870605,ESF Switchgear Rooms Halon Sys Rendered Inoperable W/O Continuous Firewatch.Caused by Cognitive Util Personnel Errors.Work Authorizing Documents Rescheduled
05000483/LER-1987-008, :on 870504,util Maint Electricians Blocked Open Fire Door W/O Establishing Continuous Fire Watch.Caused by Lack of Understanding of Tech Spec Requirements.Util Maint Personnel Counseled