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 Issue dateTitleTopic
ML17304B1583 May 1989Special Rept 2-SR-89-004:on 890406,preplanned Alternate Sampling Program Initiated When RCS Reached Temp of 555 F on 890330.Temporary Mod Request to Isolate Demineralized Water Sys Approved & Addl Sampling PerformedTemporary Modification
ML17304B1903 May 1989Special Rept 3-SR-89-002:on 890418,radiation Monitor Inoperable for Greater than 72 H.Incident Result of Core Being off-loaded to Spent Fuel Pool for Refueling
ML17304B22130 May 1989Special Rept 3-SR-89-004:on 890512,while Unit in Refueling Outage W/Core Offloaded to Spent Fuel Pool,Inservice Insp of Steam Generators Completed.Complete Results of Insp Will Be Submitted by 900512
ML17304B2455 June 1989Special Rept 3-SR-88-007-01:on 881024,inoperability of Both Channels of Reactor Vessel Water Level Sys Occurred for Period of Greater than 48 H.Caused by Malfunctioning of Communications Board.Replacement Board InstalledReactor Vessel Water Level
Post Accident Monitoring
ML17304B32614 July 1989Special Rept 2-SR-89-005:on 890712,load Shed Signal of 13.8 Kv Bus 2E-NAN-S02 Resulted in Deenergizing Reactor Coolant Pumps 1B & 2B & Reactor Trip.Caused by Less than Nominal Decay Heat.Unusual Event Declared.Ler Will Be Submitted
ML17304B3783 August 1989Special Rept 1-SR-89-003-01:on 890402,72 H Limit for Inoperability of Condenser Evacuation Sys High Range Effluent Monitor Exceeded.Caused by Monitor Declared Inoperable on 890330 Due to Moisture Buildup in Monitor
ML17304B45712 September 1989Special Rept 2-SR-89-006:on 890817,radiation Monitoring Unit Inoperable for Greater than 72 H.Caused by Monitor Spiking High.Radiation Monitor Calibr Per Approved Procedure & Found to Be within Calibr Requirements
ML17305A29410 October 1989Special Rept 1-SR-89-009:on 890910,plant Vent High Range Effluent Monitor Inoperable for Greater than 72 H Due to Nonfunctional Skid Mounted Instrumenting Control Unit for Low Range Monitor.Suppl Describing Cause Will Be IssuedPost Accident Monitoring
ML17305A31817 October 1989Special Rept 3-SR-89-007 on 890930,radiation Monitoring Unit Inoperable for Greater than 72 H.Caused by Implementation of Design & Software Changes Needed to Improve Performance of Monitor.Corrective Actions Unnecessary.Operability Restored
ML17305A37231 October 1989Special Rept 2-SR-89-007:on 891002,72 H Limit for Returning Fuel Bldg Ventilation Sys low-range Radioactive Gaseous Effluent Monitor & high-range Monitor to Operable Status Exceeded.Cause Under Investigation
ML17305A43720 November 1989Special Rept 1-SR-89-003-02:on 890402,radiation Monitoring Unit Inoperable for More than 72 H.Caused by Questionable Accuracy of Gas Chamber & Lack of Addl Heat Tracing on Stated Monitors.Tracing to Be Installed
ML17305A44030 November 1989Suppl 1 to Special Rept 2-SR-88-009 Re Radiation Monitoring Unit Inoperable for Greater than 72 H.Mod Implemented in Unit on Single Detector of Condenser Vacuum Pump/Gland Seal Exhaust Low Range Monitor.Mod to Be Completed by 900401Temporary Modification
ML17305A45316 December 1989Special Rept 2-SR-88-006,Suppl 1:on 881014,containment Bldg Atmosphere Process Monitor Inoperable for More than 72 H.On 881111,single Channel Analyzer Amplifier Board Could Not Be Adjusted within Specs.Approved Work Order Issued
ML17305A45416 December 1989Special Rept 1-SR-89-005,Suppl 1:on 890505-08,radiation Monitoring Unit Inoperable for Greater than 72 H.Caused by Failure to Adequately Verify Configuration of Particulate Filter Assembly After Work Performed.Individual Counseled
ML17305A4758 January 1990Special Rept 2-RS-89-011:on 891204,condenser Evacuation Sys low-range & high-range Radioactive Gaseous Effluent Monitors Declared Inoperable Due to Low Flow Condition & 72 H Limit for Monitor Inoperability Exceeded on 891207
ML17305A48215 January 1990Special Rept 3-SR-89-009:on 891215,containment High Range Area Radiation Monitor Unit RU-149 Inoperable for Greater than 72 H.Caused by Malfunctioning Logic Card Due to Inadequate Connection of Eprom to Socket.Card Replaced
ML17305A48316 January 1990Special Rept 2-SR-89-009:on 891212,Channel a of Quality SPDS Could Not Be Calibr & Declared Inoperable.On 891215, Trouble Alarm Received from Power Supply to Channel A.Sys Inoperable for More than 7 DaysReactor Vessel Water Level
Post Accident Monitoring
ML17305A48820 January 1990Special Rept 1-SR-88-008-01:on 881014,loose Parts Detection Sys Channel 5 Declared Inoperable Due to Repeated Spurious Alarms & Not Returned to Operable Status within 30 Days. Alarm Setpoint Will Be Reset & Channel Returned to Svc
ML17305A49729 January 1990Supplemental Special Rept 2-SR-89-007:on 890929,radioactive Gaseous Effluent Monitors Declared Inoperable Due to Frequent Low Flow Alarms.Monitors Returned to Operable Status on 891002,violating 72 H Limit
ML17305A5256 February 1990Special Rept 3-SR-90-001:on 900105,plant Vent Sys Radioactive Gaseous Effluent low-range Monitor RU-143 Declared Inoperable & Remained Out of Svc for More than 72 H.Caused by Anomaly in Check Source Circuitry
ML17305A55923 February 1990Special Rept 3-SR-90-002:on 900118,loose-part Detection Sys Inoperable for More than 30 Days.Engineering Investigation of loose-parts Detection Sys Response & Troubleshooting to Determine If Problem Is Hardware Deficiency in Progress
ML17305A6564 April 1990Special Rept 3-SR-90-003:on 900302,radiation Monitoring Unit RU-1 Removed from Svc for More than 72 H Due to Differences in Indicated 10 Minute & 1 H Average Particulate Channel Radiation Levels.Alternate Monitor Installed
ML17305A6592 April 1990Suppl 1 to Special Rept 2-SR-89-010:updates 891105 Incident When post-accident Sampling Sys Declared Inoperable & Not Returned to Svc within 7-day Required Period.Caused by Leakage in Check Valve.Leaking Check Valve Replaced
ML17305A6622 April 1990Special Rept 2-SR-88-009:on 881209,radiation Monitoring Unit Inoperable for Greater That 72 H to Perform Corrective Maint on Low Range Monitor.Plant Change Request Initiated to Make Temporary Mod Permanent DesignTemporary Modification
ML17305A6846 April 1990Special Rept 1-SR-90-001:radiation Monitor Inoperable for Greater than 72 H.Caused by Inability to Sample Refueling Bldg Ventilation Exhaust Since All Fuel Bldg Ventilation Out of Svc to Perform Scheduled Maint.Fuel Bldg Sampled
ML17305A68612 April 1990Special Rept 2-SR-90-001:on 900323,Train B Class 1E 4,160 Volt Bus Deenergized in Order to Perform Scheduled Maint. Preplanned Alternate Sampling Program Initiated to Monitor Plant Vent & Fuel Bldg Ventilation Sys.Sys Returned to Svc
ML17305A71621 April 1990Special Rept 1-SR-90-002:on 900327,radiation Monitoring Unit Was Inoperable Greater than 72 H in Order to Implement Mods Required to Improve Performance of Monitors.Monitors Declared Operable on 900410
ML17305A7292 May 1990Special Rept 3-SR-90-002-01:on 900118,loose Part Detection Sys in Alarm Condition Since Startup.Channels Will Be Reworked & Returned to Svc During Next Scheduled Refueling OutageTemporary Modification
ML17305A7302 May 1990Special Rept 1-SR-89-009,Suppl 1:on 890907,radiation Monitoring Unit Inoperable in Excess of 72 H.Caused by Failure of Sys Board Zero Insertion Connecting Socket to Ensure Solid Contact.Engineering Evaluation CompletedPost Accident Monitoring
ML17305A77211 May 1990Special Rept 1-SR-90-003:on 900421,condenser Evacuation Sys high-range Radiation Monitor RU-141 Declared Inoperable for More than 72 H Due to Unstable Sample Flow.Caused by Moisture Accumulation in Flow Element.Heat Tracing Added
ML17305A78215 May 1990Suppl 3 to Special Rept 2-SR-88-009:on 881209,radiation Monitoring Units Inoperable for Greater than 72 H.Caused by Corrective Maint.Radiation Monitors RU-143 & RU-144 Returned to Svc on 890322 & RU-141 & RU-142 Returned on 900623Temporary Modification
ML17305A82324 May 1990Special Rept 1-SR-90-004:on 900418,post-accident Sampling Sys Inoperable Greater than 7 Days.Event Caused as Result of Failure to Communicate Plant Status.Engineering Evaluation of Components Exposed to RCS Fluid & Pressure Begun
ML17305A8685 June 1990Special Rept 3-SR-90-004:on 900509,radiation Monitoring Unit Inoperable Greater than 72 H.Caused by Inability to Maintain Detector Parameters to Meet Surveillance Testing Acceptance Criteria.Evaluation of New Detectors Being Performed
ML17305A87012 June 1990Special Rept 2-SR-90-003:on 900503,cathodic Protection Sys Inoperable Over 30 Days.Caused by Insufficient Voltage Shift Due to One Anode in Sys Not Having Sufficient Current Capacity Due to Installation of Steel Between Bldgs
ML17305A90322 June 1990Suppl 2 to Special Rept 2-SR-89-007:on 890929,radioactive Gaseous Effluent Monitors Declared Inoperable for Greater than 72 H Due to Frequent Low Flow Alarms.Caused by Limit Switch Out of Adjustment.Limit Switch Readjusted
ML17305A92811 July 1990Suppl 4 to Special Rept 2-SR-88-009:on 881206,condenser Vacuum Pump/Gland Seal Exhaust Low & High Range Monitors Declared Inoperable.Capacitive Feedback Path Will Be Eliminated to Prevent Spurious Output PulsesTemporary Modification
ML17305A92911 July 1990Special Rept 2-SR-90-004:on 900613,radiation Monitors RU-145 & RU-146 Inoperable for More than 72 H.Caused by Tech Spec Calibr,Installation of Temporary Mod & Detector Replacement. Monitors Returned to Svc on 900626Temporary Modification
ML17305A9969 August 1990Special Rept 2-SR-89-009:on 891212,Channel a Reactor Vessel Water Level Sys Declared Inoperable & 7-day Limit Exceeded on 891219.Modem Found to Have Drifted Out of Tolerance. Channel a Modem Replaced & CalibrReactor Vessel Water Level
Post Accident Monitoring
Temporary Modification
ML17305A9979 August 1990Special Rept 2-SR-89-010:on 891201,post-accident Sampling Sys Inoperable for More than 7 Days.Probably Caused by Leak Booster Pump Seals.Replacement Booster Pump Installed & Clogged Valve Replaced
ML17305B00916 August 1990Special Rept 2-SR-90-005:on 900719,plant Vent Sys High Range Effluent Monitor Inoperable Greater than 72 H.Caused by Length of Surveillance Test Procedure.Surveillance Test Successfully Completed & Radiation Monitors Returned to Svc
ML17305B01921 August 1990Special Rept 1-SR-90-005:on 900725,performance of Loose Parts Detection Sys Might Result in Alarm Condition.Cause of Spurious Alarms Due to Sensitivity of Sys.Engineering Evaluation Determined Sys Operating Properly
ML17305B1013 October 1990Special Rept 1-SR-90-006:on 900905,radiation Monitor Inoperable for More than 72 H.Caused by End of Life Failure of Blower Fan.Blower Replaced & Test Procedure Revised to Include Appropriate Acceptance Criteria
ML17305B16927 October 1990Suppl to Special Rept 2-SR-88-009:on 881206,radiation Monitoring Unit Inoperable for More than 72 HTemporary Modification
ML17305B18112 November 1990Special Rept 1-SR-90-006:on 900905,containment Atmosphere Radiation Monitor Inoperable for Greater than 72 H.Caused by End of Life Failure of Blower Fan.Blower Replaced & Test Procedure Revised
ML17305B31510 January 1991Special Rept 2-SR-90-007:on 901212,diesel Generator Valid Test Failure Occurred.Caused by Air in Diesel Generator Fuel Lines.Maint Bulletins Distributed to Plant Maint & Work Control Groups
ML17305B33016 January 1991Special Rept 1-SR-90-007:on 901221,containment Bldg Atmosphere Radiation Monitor RU-1 Inoperable for More than 72 H.On 901218,monitor Declared Inoperable Due to High Flow Conditions.Caused by Failure of Flow Totalizer
ML17305B33416 January 1991Corrected Copy of Special Rept 1-SR-90-007.On 901221, Containment Bldg Radiation Monitor RU-1 Inoperable for More than 72 H.On 901218,monitor Declared Inoperable Due to High Flow Conditions.Caused by Failure of Flow Totalizer
ML17305B3554 February 1991Special Rept 1-SR-91-001:on 910111,fuel Bldg Ventilation Sys high-range Radioactive Gaseous Effluent Monitor Inoperable for More than 72 H.Caused by Need to Replace Power Supply. Monitors Returned to Operable Status on 910113
ML17305B60920 June 1991Special Rept 3-SR-91-003:on 910619,inadvertent Containment Spray Actuation Sys Signal Received,Resulting in Inoperability of Both Trains of Containment Spray Sys. Containment Spray Pump Restored & Agencies Notified
ML17305B65517 July 1991Special Rept 3-SR-91-005:on 910712,unidentified Leakage Exceeded TS 3.4.5.2 LCO for RCS Leakage Limit of One (1) Gallon Per Minute Due to Leakage from Reactor Coolant Pump Seal Injection Hx.Leakage Reduced to Allowable Limit
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