ML20125B280

RO-79-158:on 790926,A/E Advised That HPCI & Automatic Depressurization Sys (ADS) Cabling Affecting Control of HPCI Inboard Steam Supply Isolation Valve Did Not Meet NRC Criteria.Caused by HPCI & ADS Cabling in Same Raceway

ML20125B280
Person / Time
Site:	FitzPatrick
Issue date:	09/26/1979
From:	Leonard J POWER AUTHORITY OF THE STATE OF NEW YORK (NEW YORK
To:
References
NUDOCS 7910290146
Download: ML20125B280 (1)

Text

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~w ".. wWP g; TO: President & Chief Operatir.g Officer TO: Director of Regulatery oceration Cha t r-.an , S P C , f 'USNRC Region f -

Manager of Nuclear Operations ,

,631. Park Avenue

. King of Prussia, Pennsylvania 3g - a v/4 _ m "* .

19806

.n , 2 :, g w. .v FM (  !). DATE/ TIME: 9/26/7? - ~FM ( )-

DATE/ TIME: 9/26/79 ,

Fit 0M Jnras A. FI tzPetrick Nuclear Power Plant '

P.0, Box 41 -

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~ Lycc ning. New York 13093

SUBJECT:

PROFFT MEPORTAetE OCCURRENCE 00Cr.ET MD. 50-333

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s . ..i s s 3 E ,. m . . _ . ASSIGNED GP. NO.79-158 LER NO, 7?-056 a.. au;.awp,.e' 4 ,-

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, 26, 1979.

'REPear DATE: , Secte"ber EVENT DATE: SepteMer 26;-197? , ,, ,

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The Piant Staf f was inf erred by the Architect-Engineer th9t additional High Pressure Coolant Infecticn Systen (llPCI) and Autmatic Depressurti.aticn System cabling affecting control of the HFCI fr. board s team sucply isolation valve did not have the seoaration criteria reuutred by the Derfulatory Comission, This datemination resulted from the fire hazards analysis Seing conducted by the Architect-Engineer, ,

COMP 0fE.4TS II;VOLVED: Valve 23 f10V 15 -HPCT Inboard Isolation Valve, steam supply.

GUSE AND UU'EDI AL ACTION: ,

- 1 Six (G) cables which could affect th'e centrol df the inboard isolation valve (cr the imCI steam weply !!ne (23 f10V 15) were 1ccated in a racewey containing A05 cah11ng, this valve is a normally open valve and is backed up by a nor-ally shut outboard valve (23 f10'/ 16) in the. high pressure coolant injection system steam supply ifne. To pre-clurfe inedvertent shutting of the normally open inboard isolation velve, should a fire Occur which would af fect the cables identified by the Architect-Engineer, the breaker

<til be rec &ed out. The <mtboard isoletion valve which is normally in the shut position fulfills the recuira ent of the Technical Specifications for the limiting conditions of ~

en ta i rr =nt i sol a t.f en .

In addition, the Architect-Endineer infor- ed the Plant that other (third party) cables c.mid af fect the creration of' this; valve haceuse of tcir pro *ity to both.HPCI and ,

ADS cahics, it is our present intention, based on the aralysis of this indicated gebirm, to ec' rect this situation by installing a redundent ADS control system dring the forthco:' ring refueling outage sched!aled for the Spring of 1980.

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'CILITY'5TATUS:

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% THERFAL F0WER 52%

I Routine Startuo Shutdown Pontian SWhn Refuelino  :

Steady State Power A Other Load Change _

j Not Applicable

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written follew-up re tort will be sent within two weeksd / s l

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