IR 05000296/1979018
| ML18024B197 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 11/02/1979 |
| From: | Abercrombie H TENNESSEE VALLEY AUTHORITY |
| To: | |
| References | |
| NUDOCS 8001030460 | |
| Download: ML18024B197 (4) | |
Text
RKGULATO INFORMATION DISTRIBUTION
'TEM (RID8)ACCESSION NBR;8001030460 DOC~DATE'9/li/02 NOTARIZED:
NO FACIE:50 206 Br owns Fer ry Nuclear Power Stationi Oni t 3j Tennessee AOTH",NAME AUTHOR AFFlLIATION ABEACROMBIEiH,L-Tennessee Yalley Authority RECAP, NAHE RECIPIENT AFFILIATION DOCKET 05000296 SIZE>SUBJECT: RO 50 296/7918:on 791030iduring logic testing per LPCI modsi simultaneous startinq of two RHR pumps occured,Caused by mismatch between current transformei ratios on normal supply to shutdown boards.Transformers will be changed.DISTRIBUTION CODE~M007S COPIES RECEIVED:L~TR, ENCL TITCE: LKH'Backf i t)N PC~Q7E8~a RECIPIENT ID COOE7NAME COPIES Lf'f R ENCL RECIPIENT ID CODE/NAME':
WWW~&&~W COPIES LTTA'NCL~INTERNAL~01 O4 ISE'"*NSIC S HANAUER EXTERNAL: 03 LPDR 1 2 i 02 NRC PDR MPA'IRELAND TOTAL NUMBER OF'OPIES REQUIRED: LTTR 9 ENCL
>I h II H I'N I'gl',1,~I ll tl Q.8 Mc.lear ReguleMz.y CemcrzE.saiacL Regicze X,I LOX.I'iexiettzc St.'eeet At,lan~~CeczegM 30303<>Nov~p 3: dq t)g p OggUY L g, UPRrGHT~y~gzcD841 y+$904 P, L4~~is~Lt.~~he(BFRQ-56-296/79'M Reported vmler Teahnfoal Speeifkmtfoxxs 6.7.2.a.(9):
Dste ot Oeczcrxenec:
M/39(79'T&c:r~f Gecvxxeaee:
X%33)crt.~Unit.3'Teehcckoel speeifierccKon, Savolveck.
o+L.sppkkcawe-FSAR 8 4.4 X Conrrcitfans PrLor to Otezzrxenee:
Ozzf t 3 va0 in xefzzvkkzrg shut8owcc IcIazztifkcetiom en@DescrJ, t9orrz of geeurxeoea:
Dccefi~s Iron)n tesrf ng asaociete8 wXt'Iz t,PCS xaodific~Cfome, a zc&uccLtcczreoue staxtXvg af terai RRR pmcrps accvrrec3.
Th%0 oiczcczEtoneuccs storting caused e 8.'.fffereotfaL rice>y" opsrzztinzz of the norcaaL sczppky te the sbutdcrwn board from tbo unit bpsrd.Analysis eE cauaerc aM opexatuz aetioms rhqzzi.red waxr corupKeted ace Nav~~bex 2, 1979., I h.chant Cause of Oeavrxee e: XzzzrestSpOtfecc bccs reveals.d that a cxrIematch e.c:fees betcmecz the eccxxezct txccasfpnner ration o~the noxcccaR.supply ta th>>slmttdnvn bemata.%bi.rz mienrztekz a11ecw cuxreczr: tcc fXocr thrmgIz the,@@Lay ca%La mhnavver a prhumy izcrreat, lifer.rmtfnX o8 699 ceczpq mists Xtzy yf~zLtszzc.ecczr strzrtieg of the gHP, pwaps S.s the only avant, Mezztkfied that..can.cause thf,s df.Hetezctfal czzrxezzt to exist othe.x ReX4cted Bventcc LFCX logic LestIng wee in prosres6.C~eraetfve Ac&en TA~ox jlaczczeC:
The czcttr.nt treason'anncxs veXX bs cb-"Dyed.to ssezcre prupax matcbkng oK secondary czzrrezcts vftb.palms~~ccxrezzts.
&I.s ectkezz wLXL he taken prkor ta unit seartup Me have xevLaew4 the 4eeigcc ccrc aLX other un'.ts'LeetricaX, 5ccfety-xa'Lated system zczc4 hncze 8eterufaed that zoo+thar oases ernest of currant transEormev mismatch.~r+K.L..Aberexcn'nbfe, Paver Plant Szzperizctezzdtnt
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