ELV-01599, Discusses Mods to HED-1114 Re Plant Dcrdr,Per . Amber Monitor Light Covers Installed for Spare Pumps to Make Status of Pumps Readily Apparent to Operator

Discusses Mods to HED-1114 Re Plant Dcrdr,Per . Amber Monitor Light Covers Installed for Spare Pumps to Make Status of Pumps Readily Apparent to Operator

ML20059G411
Person / Time
Site:	Vogtle
Issue date:	09/04/1990
From:	Hairston W GEORGIA POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
ELV-01599, ELV-1599, NUDOCS 9009120294
Download: ML20059G411 (2)

Text

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7 ff Georgia hower Oompany ;E I

, ,,*Y i 333 Pcdmont Avenue ,

Atlanta / Georgia 30308 ,-l TeMphone 404 52G3195 - y

< Marbng Address ~ . . . ,

': 40 inverness Centet Parkway J 't

~  ; Post Oftce Box 1295 1 B<rmingham, Alatoma 35201 i Telephone 205 BG8 5581 - j SeptemberL4.1990__ ,,,, ,,,,, y,,, syyy,n 7 l W. O, Hairstor' di senior vee r uen - ELV-01599 Nuclear Operatims 366- [

j Docket Nos. 50-424 50-425: 'i i

U S. Nuclear Regulatory Commission i Document. Control Desk ATTN:

i Washington, D. C. 20555 Gentlemen: .

V0GTLE ELECTRIC GENERATING PLANT- l DETAILED CONTROL ROOM DESIGN REVIEW' In letter ELV-0503 dated May 9,1989, Georgia Power Company indicated that HED-ll14 would be resolved by' replacing- the existing. system monitor lights for each train of.the Component Cooling Water (CCW). and: Nuclear Service Cooling; Water _(NSCW) systems with a single. light per train. While; preparing the design. .

change package, it became clear that the operational: status of all CCW. and NSCW pumps was-necessary and HED-ll14 has been modified as discussed below. j The current operating practice is to use the spare pumps'of: the CCW and NSCW- I systems for normal operating equipment rotation. When thel installed spare pumps j are operating, the receipt.of a. safety, injection signal would cause all three pumps to.run which creates excessive flow through the system heat exchanger. If-the previous HED had been implemented, the existing three: lights per train -(one . ,

per pump) would have been reduced to'one-light per' train ~. The fact'that three- 1 pumps were running on one train of the CCW or NSCW: Systems would.not have been 1 readily apparent, causing the excessive flow to go undetected until much later -

-l in the accident scenario. Colored monitor light covers'-(amber):have been. ,

installed for the spare pumps which makest it readilyLapptrent tof the operator if the installed spare and the other two' pumps are running. - We believe' that- the.

use of the amber monitor light. cover to indicate the status' of the installed  ;

spare pump .is superior to using only one. light to-indicate'the status of all three pumps. This makes it easy to identify the, installed. spare pump status: and ^!

the emergency procedure response has been revised'to verify the-third pump is ,

secured at_the appropriate' time. i If there are any questions, please contact this office. _,

Sincerely, g[/' E+ i W. G. Hairston, III WGH,III/PAH/gm /

xc (see next page) { g$g /-

00103 1,0 9009120294 900904 PDR ADOCK 05000424 ,

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Georgia PoiverI (

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. U; S.. Nuclear Regulatory (,cmmission ,

ELV-01599-  :

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-i xc: Georaia Power Comoany Mr. C. K..McCoy.  :

Mr. G.. Bockhold, Jr.

Mr. R. M. Odom.

Mr. P. D. Rushton NORMS U. S.' Nuclear Reaulatory Commission- 3 Mr. S.: D. Ebneter.- Regional Administrator -

Mr. T..A. Reed, Licensing Project Manager, NRR '

Mr. B. R. Bonser, Senior Resident Inspector,' Vogtl.e I

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