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 OOCKET NUM I NRC FOIIM 195 a Ai78) 4 50-259 260 Fll E NVMBE NRC DISTRIBUTION Fo . ART 50 DOC I(ET IVlATI:-RIAL. INCIDENT REPORT I TO: 'FROMI DATE OF DOCUMENT 5/25/76

'R, NORMAN C,.MOSELEY TENNESSEE VALLEY AUTHORITY CHATTANOOGA~ TENN DATE RECEIVED

@ARETTE 5/28/76 R 0 NOTOR IZE D PROP INPUT FORM NUMBER OF COPIFS RECEIVED i OORIGINAl QUNCLASSIFIEO 3@COPY NONE SIGNED DESCRIPTION ENCLOSURE 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'.

DO NOT REMOVE LANT NAME NOTE: XF PERSONNEL EXPOSURE XS HTVOLVED SEND DIRECTLY TO KREGER/J. COLLINS BROWNS FERRY 1 & 2 I SAFETY FOR ACTION/INFO RMATION ENVIRO 6 1 76 RJL BRANCH CHIEF: PURPLE W 3 CYS FOR ACTION LIC ~ASST: SHEPPARD W/

AC S 'YS CYS HOLDING/ ENT TO LA INTERNAL 0 IST R I 8UTION RE F NRC PDR I&E 2 SCHRO'.":DER/IPPOLXTO OtIS+ XT NOVAK CHECK R3tlES S HWEN F. I

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.DF,,"t:O~lLWCCA BAI;I SlIAO-VOT.T,l II'.ti+BUh(;II Kl'1',gI'Ih~~gl,gu!S EXTEIINALDISI'IIIUUTION CONTROL NUIYII)ER TIC NSXC NIIC I C)IIM I!IIiI'2 7!II

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ENNESSEE VALLEY AUTH Y CHATTANOOGA, TENNESSEE 374ot 1pp6.t916 I/ay'5'976 Mr. Ifommm C. Ikoscley, Director >w$,+<p'~y Ue S e Huclear Rc~l1LR uoÃg Goii~aaion Office of Xnspection and ~orcmrd."nt Re+on XX 230 -eachtree Strcct, Atlanta, i'., 8th floor n~ ','i~~

George.a 30303

Dear Ih'. ~~useley:

TZE~XSEH VALLEY AU&03XTY BEXt"'IS F~~ NUCL' "LO'Pi'lIXLa 1 AIG)

V. 'XiS. $ 0-2)g AIS >0-260 - iACDZPl OPL'PA, XIrG LXC S~ D".8-33 2'¹ AIID K-"R-g2 - IVKZEK~'CCUPY i',Ci'&ORTS E."BC-j'0-Zgp/7&itl IUD E".BO-$ 0-260/765 4U 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 ihia event occurred on ~mls i~'crrJ Huclear i.'lant units l Rct,ukatorJ Guide 1.3.o, Revision 4, Au"ust l<j7$ .

and Very tnt pnurs, ybcNtto, 6

MNHLQ KMKQMU VALLIH'UXGORXZC 1

MQ 397 REG u s gg<ISAR co~'IS'5 Hg Se Ipox 0~ Mall Director of Power Production 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 Oi'fico

'roi'ns 40 ection amt ".Morcc-.:ent

~ '.S. IIuclcax inc.ulctoxg- t.,omd.aa9.on I as~wnj DoCe c.OQ+g

, g383 An Equal Opportunity Employer

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CENSEE EVENT REPORT CONTROL 8LOCKe'., (PLEASE PAINT ALL AEOUIAEO INFOAIVIATION7 1

LZCFNSEE LCENSE EVENT NAME LICENSE NUMBER TYPE TYPE

[oO~] A L B R F l 0 0 0 0 0 0 0 0 0J 7 89 14 15 25 26 30 31 32 REPORT REPORT OOCKET NUMBER REPORT OATS 7

[OD1]CGN'T 8

~+

CATEGORY 57 58 TYPE T

59 SOURCE L

60 0 5 0 0 2 5 9 68 69 0 5 EVENT OATE l 3 7 6 74 0

75 5 2 2 7 6 80 I

EVENT OESCRIPTION

~02 RPV stabilizer bearin blocks are installed 90 de rees from the intended orientation 7 8 9 80 (Units l.and 2 . 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 80 Jag 7 8 9 PRME 80 SYSTEM CAUSE COMPONENT COMPONENT SUPPUER MANUFACTURER IoalI ~cA COOE COBE A N COMPONENT COOS A N 0 R R LNJ 44 A l 7 2 N 7 8 9 10 11 12 17 47 48 CAUSE OESCRIPTION tOOI Incorrect installation caused b ersonnel error durin construction.

7 8 9 Jog 7 89 pro]

7 89 METHOO OF FACILITY l

7 Q~g 8

STATUS 9

0 ~oo 10

% POVVER 12 13 NA OTHER STATUS 44 DISCOVERY B

45 46 OISCOVERY OESCRIPTION 80 FORM OF ACTIVITY CONTENT RELEASEO OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE z z m. NA 7 8 9 10 11 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION

~co ~00 0 Z NA 7 89 11 12 13 80 PERSONNEL INJUFIIES NUMBER OESCRIPTION H~OO 7 89 O NA 11 12 80 OFFSITE CONSEQUENCES Jig 7 89 80 LOSS OR DAMAGE 'IO FACILITY 7

Q~g 89 TYPE z

10 OESCRIPTION PHONE'0'0 80 PUBLICITY m

7 89 80 AOOITIONAL FACTORS NA 89 Qgg 7 89 80 cl 0 eel eeT

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