ML17252A870

Letter Confirming a Conversation Concerning No. 1 Off Gas Monitor Being Out of Calibration on 10/20/1972 and the Trip Setting on One Monitor Greater than the Technical Specification - Dresden Unit 3

ML17252A870
Person / Time
Site:	Dresden
Issue date:	10/24/1972
From:	Worden W Commonwealth Edison Co
To:	Greer B US Atomic Energy Commission (AEC)
References
Download: ML17252A870 (1)

Text

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• SUBJECT DPR-25 Attempts to deliver (IndICate DA or t/ DESDEN NUCLEAR POWER STATION UNIT 3 IBIS WILL CONFIRM A CONVERSATION WITII MR H DANCE or YOUR OFFICE AT 1100 HOURS THIS DATE CONCERNING NOo 1 OFF GAS MONITOR BEING OUT OF CALIBRATION ON 10-20-72 TI<E INSTRUMENT MECHANICS WHILE MAKING A MONTHLY SURVALANCE CALIBRATION ON UNIT 3 OFF GAS MONITOR FOUND THE TRIP SE'ITING ON ONE MONITOR GREATER iHAN SPECIFIED IN THE TECHNICAL SPECIFICATIONS SECTIONS 3. 2oDo A OF THE TECHNICAL SPECIFICATION STATE THAT THE TRIP SETTING FOR SF-1201 MONITOR SHALL BE SET AT A VALUE NOT TO EXCEED TIIE EQUIVILANT 1 0F STACK REI.... EASE L !MIT SPECIFIED IN SPECIFICATION

3. 8 THE ST*ACK RELEASE LIMIT UNDER OPERATING CONDITIONS AT THE TIME WAS O. 7 CI/2ND TilE TRIP SETTING ON NOo 1 OFF GAS MONITOR WAS FOUND TO BE 1o0CI/2ND THESE MONITORS DO NOT HAVE A HISTORY OF PREVIOUS FAILURES THE STATION WILL REVIEW TIIE PRESENT TRIP SETTING TO DETERMINE OF A LOWER LIMIT CAN BE USED Wo P. WORDEN SUPT DRESDEN NUCLEAR POWER STATION COL DPR-25 3 1100 1 33.2.n.1 3.8 0.1 CI/2ND 1 1.0cI/2ND