ML20136C065
| ML20136C065 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 02/20/1979 |
| From: | Dicken M BABCOCK & WILCOX CO. |
| To: | |
| References | |
| TASK-TF, TASK-TMR 198, PROB-790220, NUDOCS 7909140341 | |
| Download: ML20136C065 (2) | |
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'O SITE PROBLEM REPORT RESOLUTI0ft TRAftSi1ITTAL To:
Change Control For Distribution File: 13-G - l'7 E S. H. Klein For Information Contract flo.:
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B. A. Karrasch For Information SPR liumber:
Ul f ks!O b O keyct For Action
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All Affected Task Engineers de,lf(M 5.l 2 se LL,1 For Information
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I' Unit Managers M. >c hy Date Of Transmittal:
tion Requested:
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/ Reply and Return This Transmittal to: Nuclear Service Support Engineer CC; J. R. Bohart - International Support P. E. Perrone-OTR W Raguc - TlI Sii.c B. W. Street - Oconee Site D. A. Lee - TECo Site T. F. Seitt Mo Sh O 7 9 0014 0 3q ; 6 l
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.,1.. a < m. : e A ~t n l l ' c r n ..:.~r::. ~ I DESCRIPTLOM GF P R O B L Ell: t i Uncble to ad.just the existinc delta flux difference amplifiers to e obtain "F." fa: tors greater than 5 as required by the results of TP 800/15 .I f (Power Intalance Detector Correlation Test ). t 4 x ?' o ~ u I w e-i w c t = w .e E STATUS-ACTION TO DATE, thCLUDitlG PERSONS CONTACTE0: g a: Ch I,, '. q M n G, r; IN) }". UJ 'A FA ['t f1 r", t*"3 o (:.'h ?*. p A. " la i - O 't>- It ' n t ' q i u s :.. ; r. j,a % y.; q.4 a 9 s.>e e r\\ tt ae n.eu c. v v.- t a ,p yo1-Y Ro I l . y s FURTHER ACTION RECOHHEsDED BY StTE PERSONNEL: e It is re:o.-. ended that evaluations be na:ie to ascertain that the cc-built Q rance of the r.plifier 6cin is e.dequate for other plants and to deternir.e if the pres er. codifice. tion vill still be adequate for ti.e expecte.1 iner.2r,ci Cain cettin;r in subcequent cycles of cperation, g Fleace s.i.-!:e if further documen;:.tien of this modifice. tion is req :irei. 1 RESOLUTION: 1 The wiring riodification completed on TMI#1 may also be applied to TMI #2 to l! increase the gain capability by a factor of 2. No further documentation for ,j this modification is required unicss requested by the customer. ], go /2tg7 peg // c7to AJ /.3 $Gou t/d G*D 87' l.$W } y g g l 1 o PREPARED Bf DATE APPROViD BY DATE j s. v C 0 REVIEWED BY DATE j ce i r i COST CATEJORf FIELD CHANGE REQ F.C.A. h0. SIGNIF. CEF:C:f'Cr ONORs OT!iER O OYES =0 e,_ Oyc3 o., St1E CC"aLi ics ;iP34': 0EvliilCss: 0 WONE SPR DEV M. : 8 O DATE C N LETED: f; x
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Modifications were made to double the gain of the scaled difference amplifiers without requiring, component changes. Spare inputs, which were previously grounded, vere used to sum each input twice; this in-creased the overall gain by a factor of two. All viring changes were made at the viring plane external to the amplifier module without modifying the amplifier itself. With this modificaticn, the amplifier gain vill still be set anywhere between 2.5 and 5 0 but will show acceptable scaled results without exceeding the maximum allowable gain of the difference amplifier. This modification was also necessary in Unit I because the cain setting at the end of Cycle III was already at 4.66 and it needed to be increased to 6.5 for the beginning of Cycle IV. ....'_._.._..u.. OLk_ f ~ External Wiring Plnne w y,,,. l yjp . E, p /A 9 U @-~ w J7 0 .. e y 7e u,a e...- e, p + g._ 3 h= 9 ...ScMel E 5JL -G 5, = o E. 2 6 ... _._ _.. _.. M E W -..e.e e. New Wb- - //# ; 'qA g, 9 J7.0 \\- r#A \\ i /,s b N I Y 2. e I G Sdd E 3 i ac. o o 4~ sa e,. (q + y-9 4) ~.
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