ML19308A438

Interim Deficiency Rept Re Ambient Temp Ranges Exceeding Original Design Limits of Fan Cooling Sys.Mod Engineered to Fan Drive Coupling to Increase Load Carrying Capability. Final Rept to Follow When Corrective Action Completed

ML19308A438
Person / Time
Site:	North Anna
Issue date:	10/10/1979
From:	Brown S VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
References
NUDOCS 7910160492
Download: ML19308A438 (1)

Text

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l' Vepco VIRGINI A ELECTRIC AND POWER COMP ANY, RICHMONO, VIRGINI A 23261 October 10, 1979

'2.Nws P. O'Reillv, Sir =ctor Seri21 10. N7A Office of Insoaction t Enfo-conent

> set /SC.':mac: wang

'J.

S. '!ucl?ar R?quiatory Co mission P?gion II Doc!:et 1c. TC-F

'M Marietca Street, Suite ECO Atlan+1, 1ecrgia 10302 Cetr ". O'Reilly:,

On Santember 11, 1170 a renort es nW uM?- t"e crevisions of 10f ED:lO. F l ei conce nin0 th* E'?-7ancv 9iesel Gace-1t p Fa.n Ico'i99 Systell.

?n-ine a review of acuiou rt speci'icitions ?qd t? suis 21uent an2 lysis of l ac ti nat:crole1 cal dat a, it ns di.ccvared th=t 26i $rt temo$rature cannes 4

exist 'Atch avceed t'? c-iqinel dasian limits of tha Fan Coolina System. This

• r'ssititas t"1t se'sen11 ble'o oitch encl? chanc?s 8:e made to frsu-a t5-t the fin d-fva ? cit ccualinq ho-sorower limit of

'0" M.D. is not $xc??!?.

d uy,*uar, t"a Inergency Di ss'! ";enerater mst

e in ' suu-?i mo'a te n$k = th?

T'911'

'lV ? oitch C i

h nces.

3 T o ?li"linate this time censumnina orec??P a $nd the subsequ?nt 9'iv111 ability of the Eatarqancy Diasel rienerators, tbe manuf 2ctu-ar IFai-Sanks

• 0-s'*) ss anoinea-ed 1 modification to tha cur-aqt 'an d*ive s52ft coupling that will increitse the f n driva shif t tars'ony! 193.? c3-rying cap 3* ility 'ren i

130 to ??O 4.P.

This vill allow tha Emerca9cv Diesal 'ienaretor,to ocerate throuohout the vea-at a fixed tim!* oitch 2nn'e wit 9c1' ovarlo3dinq the 'in driva shaft. T;ie modification involves tha addition of two 591ts to the currnnt 'our Sa't counlin i?sien.

This Intter is an inte 'm ?0-< day recort on !"is su? ject'an.!. finti r? port will he submitted when the coc-active,ct'en is r09019ta.

If W 1tior.al Information is recu! rad for your eviaw, clease 90tifv us.

Ve v trulv yours,

. d d h c. < < > '

/ /

o

/ /

/

/ n,.-f Sam O. 9riiun, -1.

Senior Vice 3resi'=nt Onwer St1tf on Encineerino and Construction

, cc: V.

V'ctor Stello, Director O" ice of Inspection 4 Enforcement

'Ar. Harold R. Denton. Directne

\\k Of' ice of Nuclear Reactor Reoistion 4p Q 7010160

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