ML18024B197
| 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'Backfi t)
N PC ~
Q7E8
~ a RECIPIENT ID COOE7NAME COPIES Lf'fR ENCL RECIPIENT ID CODE/NAME':
WWW~&&~W COPIES LTTA'NCL~
INTERNAL~
HANAUER EXTERNAL: 03 LPDR 1
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:
Ozzft 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 '.
3r0~~3 Ferry bgekesr
- Fleoc, swtlfft ~'i,g iA g ~ L ~ A ~ ~ ~ ~ ~ I 0 ~ ~
% + P W 4 5
a % 0 % 1 'l )
~ ~ hag
~ I ~ hl5 1
\\ 1 ah'l%
tI