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 Issue dateTitleTopic
ML20094E33023 January 1992Ro:On 920109,determined That One of Two Level Safety Sys Was Malfunctioning Due to Failure of LM339 Comparator Chip.Chip Replaced & Monitoring Circuit Tested Satisfactorily on 920110
ML20236A8067 March 1989Ro:On 890224,exhaust Fan Not Operating When Reactor Critical at 10W.Caused by Switch Snagged by Belt Loop as Individual Left Control Room.Reactor Scrammed & Fan Switch Returned to on Position
ML20209F2768 September 1986Ro:On 860903,during Std Shutdown of Reactor,Automatic Scram That Normally Occurs When Count Rate of Startup Channel Below 2 Cps Failed to Occur.Caused by Shorting of Input Signal.Startup Channel Repaired
ML20076K82724 August 1983Ro:During Reactor Operator Training Session,Air Monitor Near Bldg Exhaust Fan Briefly Did Not Monitor Reactor Room Effluent.Monitor Used in Sniffer Mode for Evaluating 150 Ar-41 Production.Monitor Will Be Run Normally in Future