Nuclear Measurements
Nuclear Measurements# QUERYafecac8cc77268c23147218f7c79b118
Nuclear Measurements# QUERY6aeccd55d9f273ffadc3841fcd403472
A09920, Discusses Review of R1-91-A-0219 Re Various Activities at Millstone Unit 2.W/related Matl
05000282/LER-1989-008-01, :on 890618,control Room Received Train a High Radiation Alarm Which Initiated Automatic Start of Auxiliary Bldg Special Ventilation Sys.Caused by Spike on Radiation Monitor 1R-37.Monitor Upgrade Initiated
RNP-RA/06-0030, Report of Changes Pursuant to 10 CFR 50.59
05000382/LER-1988-012, :on 880526,steam Generator Blowdown Sampling Exceeded Required Periodicity of Tech Specs 3.3.3.1,Action 28.Caused by Personnel Error.Procedures Being Revised to Verify That Monitor Inservice & Sampling Done
HL-5054, Application for Amends to License DPR-57 & NPF-5, Respectively,Associating Changes W/Installation of Digital Power Range Neutron Monitoring Sys & Incorporation of long- Term Stability Solution Hardware
05000333/LER-1996-007-01, :on 960522,sys Isolations & Standby Gas Treatment Initiation Occurred.Caused by False High Radiation Trip Signal.Detector Replaced W/Vendor Current Model
05000361/LER-1991-010-01, :on 910803 & 18,control Room Isolation Sys Train B Spurious Actuation Occurred When Sensed Background Count Rate Decreased Below Instrument Failure Setpoint. Detector & Module Replaced
05000336/LER-1994-029-01, :on 941003,control Technicians Secured Sample Flow to Stack Gaseous & Particulate Radiation Monitor Skid to Support Preventive Maint.Caused by Program/Procedure Deficiency.Alternate Sampling Initiated
05000325/LER-1982-068-03, /03L-0:on 820624,during Plant Operation, post-accident Drywell Particulate Radiation Detection Instrument 1-CAC-AQH-1262-1 Tripped & Would Not Restart. Caused by Power Supply Breaker Thermal Overload Trip
05000296/LER-1982-041-03, /03L-0:on 820820,during Normal Operation, CAM 3-90-256 Rendered Inoperable Due to Failure of Particulate Detector.Caused by Normal End of Detector Life. Scintillation Tube Replaced
05000296/LER-1982-052-03, /03L-0:on 821103,CAM 3-RR-90-256 (Drywell Atmosphere Monitor) Became Inoperable.Caused by Sample Pump Failure Due to Normal End of Svc Life.Schwitzer Series 325 Vacuum Pump Rebuilt & Returned to Svc
05000282/LER-1990-005, :on 900504,control Room Received High Radiation Alarm & Indication of Automatic Start of Spent Fuel Pool Special Exhaust Fan 121 on Two Occasions.Caused by Electrical Spike on Monitor.Modules Replaced
05000325/LER-1982-008-03, /03L-0:on 820115,post-accident Iodine Detection Instruments 1-CAC-AQH-1260-2 & 1-CAC-AQH-1262-2 Indicated Downscale.Caused by Failed Photomultiplier & Field Effect Transistors,Amplifier & Tube.Transistor Replaced
05000282/LER-1994-002-01, :on 940303,noble Gas Monitor in R-35 Did Not Respond When source-checked During Surveillance.Caused by Component Failure.Corrective Actions:Monitor Repaired & Returned to Svc
05000282/LER-1989-018-01, :on 891024,25 & 1112,control Room Received Train a High Radiation Alarm,Initiating Automatic Start of Auxiliary Bldg Special Ventilation Sys.Caused by Spike of Radiation Monitor.Monitor Replaced
05000282/LER-1991-003-01, :on 910423,auto-start Occurred of One Train of Auxiliary Bldg Special Ventilation Sys.Cause Unknown.Plant Mod Initiated Removing Unnecessary Wiring That Could Short Monitor Module
05000282/LER-1989-018, :on 891024,25,31 & 1112,control Room Received High Radiation Alarm Which Initiated Automatic Start of Auxiliary Bldg Special Ventilation Sys.Caused by Radiation Monitor Spikes.Monitor Modules Replaced
05000029/LER-1977-026-03, /03L-0:on 770518,control Room Received Low Flow Alarm on Primary Vent Stack Particulate Radiation Monitor Channel.Caused by Paper in Util Being Slightly Oversized & Boundup.New Roll of Paper Installed
05000282/LER-1989-016-01, :on 890908,control Room Received Train B High Radiation Alarm,Which Initiated Automatic Start of Auxiliary Bldg Special Ventilation Sys.Caused by Spike on Radiation Monitor 2R-30.Monitor Upgrade Being Pursued
05000336/LER-1988-010-01, :on 880921,observed That Test/Operate Switch for Each of Containment Atmosphere Gaseous Radiation Monitors Was in Test Position.Caused by Operator Error. Switch Placed in Operate Position
05000336/LER-1978-023-03, /03L-0 on 780912:during Routine steady-state Operation,Spent Fuel Storage Ventilation Gaseous Radiation Monitor Failed Low.Caused by Shorted Local Alarm Horn Which Blew Power Supply Fuse.Horn Disconnected & Fuse Replaced
05000298/LER-1991-020, :on 911210,drywell Vent Radiation Monitor Gaseous Detector Mounting Bolt Threaded Engagement Failed & Leak Rate Exceeded TS Requirements.Caused by Degraded Shield Chamber.Bolt Holes Retapped
05000259/LER-1983-011-03, /03L-0:on 830217,radiation Monitor RM-90-259A Setpoint Found Above Tech Spec Limit.Caused by Setpoint Drift.Monitor Calibr,Functionally Tested & Returned to Svc