ML17252B372

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Letter Confirming a Conversation Concerning Failure of 2-203-2D Main Steam Isolation Valve to Close Upon Receipt of Isolation Signal Following Scram on 01/22/1971
ML17252B372
Person / Time
Site: Dresden Constellation icon.png
Issue date: 01/26/1971
From: Hoyt H
Commonwealth Edison Co
To: Grier B
US Atomic Energy Commission (AEC)
References
Download: ML17252B372 (2)


Text

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WI.TH HUGH::

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DANCE REGARDING - FAILURE *- . Oft 2--203-r2D *-. MA'IN . ---* STEAM . ISSOLATION:*\<* i VALVE TO CLOSE UPON RECE'ltPT OF *1'ssOLATION SfGNAL FOLLOWINCt

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e.. ; SCRAM AT 2120 ON 1~22-71 HlGH,;MOTS:TURE_ SEPERATOR w_~!~~-:: W:._,,*_':'j

        ~         1 LEVEL TRIP OF TURBAN STOPfVALVE CAUSED S~RAM DROP OF f . ,j _ '*J._:,-_.y:

! : ,Js1HM PRESSURE BELows50 IP s 1 f w1rHMollE sw1rc11 'IN RUNJJ,f ,_': <'~*AIU s:_DN~R~.~SAOt ACTLl6:uR:R'l:F..C2L rSDU~iL04 .* A~~C O~~~LE~~~~~~~N; ~,~,}'~';;;

-' . .*. I OPERATION Of TEST AND OP~_~ATl... ~~:_!Pl_LO~S BY_MANU~~ _S\~__ l!~H/,i~*\:~}-1'

[**. . OPERATlON REMEDIAL *AcT_L_qNl BE ING. )TAl<E_N:__ l_l~_~_LU_DES C_OMP_~ET_~_,_.:*.:.J,*:,j

                   /CLEANING OF BOTH PILOT Vf\LVES SEfRVERJNG EACH OF THE FOUR: J ::*'1 t                 :!       -                         *.     .     .      -      . *-------                      ~                          '                                                   . -- .. .       .   ..                          . .      **1 i'.  ;*;*

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P'JLOT PlSTON FROM~ THE 2 fD PJLOT'VALVES SlNCE THE FlLTERs*,[::'-: ~' 1

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PE L.** ;: ' . OF :'THE. F'll TERS TES.T_l_NG fdLLOW'._l'Nq ST.ART ~UP WfLU*~*.lNCLUDE ) . T\-;'.;

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