ML18283B045

LER 1976-004W-00 & LER 1976-006W-00 for Browns Ferry Units 1 & 2, RPV Stabilizer Bearing Blocks Are Installed 90 Degrees from Intended Orientation

ML18283B045
Person / Time
Site:	Browns Ferry
Issue date:	05/25/1976
From:	Fox H Tennessee Valley Authority
To:	Moseley N NRC/RGN-II
References
LER 1976-004W-00, LER 1976-006W-00
Download: ML18283B045 (6)

Text

U.S, NUCI.L'AR REGUL.ATOIIY COMMI SION I NRC FOIIM 195 a Ai78)4 NRC DISTRIBUTION Fo.ART 50 DOC I(ET IVlATI:-RIAL

.OOCKET NUM 50-259 260 Fll E NVMBE INCIDENT REPORT I TO: 'R, NORMAN C,.MOSELEY

'FROMI TENNESSEE VALLEY AUTHORITY CHATTANOOGA~

TENN DATE OF DOCUMENT 5/25/76 DATE RECEIVED 5/28/76@ARETTE R i OORIGINAl 3@COPY DESCRIPTION 0 NOTOR IZ E D QUNCLASSIFIEO PROP INPUT FORM ENCLOSURE NUMBER OF COPIFS RECEIVED NONE SIGNED m LTR>>TRANS THE FOLLOWING:

LICENSEE EVENT RPTo (RO 50-259/766W

&RO 50-260/764W)ON 5/13/76 CONCERNING.RPV STABILIZER BEARING BLOCKS INSTALLED 90 DEGREES FROM INTENDED.ORIENTATIONo' l ACKNOVlLE>G~D

'.LANT NAME BROWNS FERRY 1&2 DO NOT REMOVE NOTE: XF PERSONNEL EXPOSURE XS HTVOLVED SEND DIRECTLY TO KREGER/J.COLLINS I SAFETY BRANCH CHIEF: W 3 CYS FOR ACTION LIC~ASST: W/CYS AC S'YS HOLDING/FOR ACTION/I PURPLE SHEPPARD ENT TO LA NFO RMAT ION ENVIRO 6 1 76 RJL RE F NRC PDR I&E 2 INTERNAL 0 IST R I 8UTION SCHRO'.":DER/IPPOLXTO OtIS+XT NOVAK CHECK R3tlES S HWEN F.I.'I~>)I.DF,,"t:O~lLWCCA BAI;I SlIAO-VOT.T,l II'.ti+BUh(;I I Kl'1',gI'Ih~~gl,gu!S TIC NSXC EXTEIINAL DISI'IIIUUTION CONTROL NUIYII)E R NIIC I C)IIM I!IIi I'2 7!II Ij 0 4 Lg s.'J ,pO 4 r oiUTIo,v o 1pp6.t916'ENNESSEE VALLEY AUTH Y CHATTANOOGA, TENNESSEE 374ot I/ay'5'976 Mr.Ifommm C.Ikoscley, Director Ue S e Huclear Rc~l1LR uoÃg Goii~aaion Office of Xnspection and~orcmrd."nt Re+on XX 230-eachtree Strcct, i'., 8th floor Atlanta, George.a 30303>w$,+<p'~y n~','i~~Tho enclosed reoort is to provide details concerni~HPT stabilizer bearin" bloctcs which arc installed~j3 de~ees iron the intended orientation and ia aQ1)wttcd in accor'ance vlth A~':clktlz 4 to Rct,ukatorJ Guide 1.3.o, Revision 4, Au"ust l<j7$.ihia event occurred on~mls i~'crrJ Huclear i.'lant units l and-2-Very tnt pnurs, 6 ybcNtto, MNHLQ KMKQMU VALLIH'UXGORXZC 1 MQ 397

Dear Ih'.~~useley:

TZE~XSEH VALLEY AU&03XTY BEXt"'IS F~~NUCL'"LO'Pi'lIXLa 1 AIG)2'¹V.'XiS.$0-2)g AIS>0-260-iACDZPl OPL'PA, XIrG LXC S~D".8-33 AIID K-"R-g2-IVKZEK~'CCUPY i',Ci'&ORTS E."BC-j'0-Zgp/7&itl IUD E".BO-$0-260/765 4U Hg Se Ipox Director of Power Production u s gg<ISAR REG co~'IS'5 0~Mall Enclosure{3)'Regulatory Doc,<et.p]

fe Dirocto (3)OQicc of!dna;Q lent Xnfor;~stion and"Co~rma Control U,S, I'llclcar io~lQGtorg Co~~~" Gaicn Iraahin=Mon, D.~205/5'r 40 Oi'fico oi'ns ection amt".Morcc-.:ent

~'.S.IIuclcax inc.ulctoxg-t.,omd.aa9.on I as~wnj DoCe c.OQ+g , g383 An Equal Opportunity Employer 0 4' CENSEE EVENT REPORT CONTROL 8LOCKe'., 1 LZCFNSEE NAME[oO~]A L B R F l 0 7 89 14 15 REPORT REPORT CATEGORY TYPE SOURCE[OD1]CGN'T

~+T L 7 8 57 58 59 60 EVENT OESCRIPTION

~02 RPV stabilizer bearin 7 8 9 I (Units l.and 2.(PLEASE PAINT ALL AEOUIAEO INFOAIVIATION 7 LICENSE NUMBER 0-0 0 0 0 0-0 0J 25 26 LCENSE TYPE EVENT TYPE 30 31 32 OOCKET 0 5 0 EVENT OATE NUMBER 0 5 l 3 7 0 2 5 9 68" 69 REPORT OATS 6 0 5 2 2 7 6 74 75 80 blocks are installed 90 de rees from the intended orientation 80 Corrective action will be to install new shims with increased 7 89 80 t004I contact surface thus meetin the intent of the ori inal desi n.Corrective action 7 8 9 80[OD5]will be im lemented rior to startu.BFRO--50-259 766W BFRO-50-260/764W 7 8 9 Jag 7 8 9 SYSTEM CAUSE COOE COBE COMPONENT COOS IoalI~cA A N A N 0 R R 7 8 9 10 11 12 17 CAUSE OESCRIPTION tOOI Incorrect installation caused b PRME COMPONENT SUPPUER LNJ COMPONENT MANUFACTURER A l 7 2 N 44 47 48 ersonnel error durin construction.

80 80 7 8 9 Jog 7 89 pro]7 89 FACILITY STATUS%POVVER OTHER STATUS Q~g.0~oo NA 7 8 9 10 12 13 FORM OF ACTIVITY CONTENT RELEASEO OF RELEASE AMOUNT OF ACTIVITY z z m.7 8 9 10 11 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION

~co~00 0 Z NA 7 89 11 12 13 PERSONNEL INJUFIIES NUMBER OESCRIPTION H~OO O NA 7 89 11 12 OFFSITE CONSEQUENCES Jig 7 89 LOSS OR DAMAGE'IO FACILITY TYPE OESCRIPTION Q~g z 7 89 10 PUBLICITY m 7 89 AOOITIONAL FACTORS NA 89 Qgg 7 89 METHOO OF DISCOVERY B 44 45 46 NA 44 45 l OISCOVERY OESCRIPTION LOCATION OF RELEASE PHONE'0'0 80 80 80 80 80 80 80 80 cl 0 eel eeT I J'~~y t