ML18283B017

LER 1977-006-00 for Browns Ferry Nuclear Plant, Unit 2, Unit Being Shut Down as Specified by Technical Specification 3.6.F.3 Due to the 2B Reactor Recirculation Motor-Generator Set Being Out of Service Greater than 24 Hours

ML18283B017
Person / Time
Site:	Browns Ferry
Issue date:	04/07/1977
From:	Fox H Tennessee Valley Authority
To:	Moseley N NRC/IE, NRC/RGN-II
References
LER 1977-006-00
Download: ML18283B017 (6)

Text

U.O.NUCLEAR AEGVLATOA V COMMISSION TO),-Mr.Norman, C~Moseley FROM: Tennessee Valley Authority Chattanooga, Tennessee H+ST Fox NRC FoAM 195 I2 TOI E , NRC DISTRIBUTION FoA I RT 50 DOCKET MATERIAL DOCKET NUMOE A-t'd FILE NUMOEA INCIDENT REPORT DATE OF DOCUMENT 4/7/77 DATE RECEIVED 4/21/77%LETTER BOA IGINAL Qcopv DESCRIPTION Q NOTOA IZE 0 UNCLASSIFIED PROP INPUT FOAM ENCLOSV RE NUMBER OF COPIES RECEIVED CnrtlCD Ltri trans the f ol lowing: Licensee Event Repbrt (R0.50-260/776) on 3/9/77 concerning the unit being shutdown as specified by tech specs due, to the 2B reactor recirculation motor-'generator set being out of.Seivice greater than 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />s~~PLANT NAME: I IIlr'owns Ferry Unit No.2 fJL (1-P)gy!LI'jj!, (1-P)NOPE: IF PERSONNEL EXPOSURE IS INVOLVED SEND DIRECTLY TO KREGER/J, COLLINS BRANCH CHIEF: Il 3 CYS FOR ACTION LIC, ASSTo: M Q CYS ACRS CYS l@CQRK S NT FOR ACTION/INFORMATION A dER.EGFL NRC PDR IAE(2 MIPC SCHROEDER/IPPOLITO HOUSTON NOVAK/CHECK GRIMES CASE BUTLER HANAUER TEDESCO/MACCARY EISENHUT INTE R MAL 0 ISTR I BUT ON SHAO VOLLLIER/BUNCH KREGER/J~COLLINS LPDR: TIC: N g EXTE RN AL DISTR I OUTI ON.CONTROL NUMBER v7i i (3(o NAC FOAM ID5 I2.76)

'4'P 0 I OiUTIOy.r@4 6g 0$~1p)6 1916 April 7, 1977 TENNESSEE VALLEY AUTHORITY CHATTANOOGA.

TENNESSEE 37401 regulatory g(~QQx, J gf

Dear Mr.Moseley:

," j TENNESSEE VALLEY AUTHORITY-BROGANS FERRY NUCLEAR PLANT UNIT 2-DOCKET NO.50-260-FACILITY OPERATING LICENSE DPR-52-REPORTABLE OCCURRENCE REPORT BFRO-50-260/776 The enclosed report is to provide details concerning the unit being shut down as specified by technical specification 3.6.F.3 due to the 2B reactor recirculation motor-generator set being out of service greater than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.This report is submitted in accordance with Browns Ferry Technical Speci-fications Section 6.This event occurred on Browns Ferry'Nuclear Plant unit 2.Very truly yours, TENNESSEE VALLEY AUTHORITY ZR+~~H.S.Fox Director of Power Production Enclosure (3)CC (Enclosure):

Director (3)Office.of Management Information and Program Control U.S.Nuclear Regulatory Commission Vashington, D.C.20555 Director (40)Office of Inspection and Enforcement U.S.Nuclear Regulatory Commission Washington, D.C.20555 An Equal Opportunity Employer~g ggMJSh rtt<<)>>T" I<<)TT'g)Q<fff 1 h<f f<fe<<f I fftl)<,'l-~yy it ti, f<<<")I T~~I, f',1'<<N<tt<1~=P J fh)ttl th f<"~C t<<1(f q~t<7'ti,h t<<;J,<h<<<.~)<j'Pi<+It<,;,C.)f"~f q tt0,";Pf-<)Tq+)$;>ty,,j, i')ilf)A,"~!<<))gg 1)f>>g(l'f f)h t<<t<>>t'1'f C))P))f,'fd/)'t$~f))f));C 1)1.j<>>[<)<)f I<)1 t f T('ht=!<)" f"<<h))f<<'f T i)ly" I<f<)<<)ph'<')',i'f T",)" h<I'<X)(.I f fy,lf,:" f.')ff"'f'" (~'~'>J" k)',>>.fff')')'"".7~9")l".)f?'a~,if91.":ff)))C'"'.PO)T",f.'

)~IT', g ti g'T~<", f I ffly)'<1 ft<)f'f<.t.grP tf<<)<fg.r<f yy)f I tt T~<>)<)<-;<1~r<)f..f'))fan)<

I Jl;, l"'t.,~)~T)]~<Pf<f X'I<ty y)fy<)<h.y',~ti<f<f,'lL uh

~i LICENSEE EVENT OGNrooL GLGGK:~~~REPORT (PLEAS trIT ALL REQUIREO I,"'FOR;1ATIO;3'I LIL',ENSEE ti'iAME LI ENSE NUMSEA LICENSE TYPE EVEtIT TYPE[oag A L'R Fl 2 0 OI 0I 0 0 14 15 ill 25'6 , 30 3'I 32 AEPOAT AEPOAT CATEGOAY TYPE SOUACE OOCKET NUMBEA EVEAIT OATE~orcowr~!L~L 0 5 0-0'2 6 0 015 0 91 77.7 9 57 59 59 60 61 69 69 74 EVENT OESCRIPTION 75 7 89 IS/0 9~o)24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.(BFRO-50-260/776)

/8 9 Cv 7 9 9 0 L6j e" COtAPOiVENT t/ANUFACTUIIEA VDLATDt I I E C F 0 E]Ir IKJ 2~00 47 wore ereiircioS 7 8 9 QOg the motor rotor to become misali ned with the't CL~~I 9 i is attributed to a lack of lubrication.

This lack of lub icat'9 K~I 7 0 ec 6" s aft cou lin METHOD OF QTHEA STATUS OISCOVOAY NA B 44 45 46 9 movement o t e ez le FACiot Y S.ATUS POWEA E~0 9 10 12 13 FOAM OF ACTIVITY CONTEtIT AELEASEQ OF AELEASE al.s 9 10 11 PERSONNEL EXPOSURES~OlO O~E 9 11 12 13 PERSONNEL Iii!JURIES NU" IBEA OESCA,PTICN

~0'o 9 ii 12 QiSCQvcAY QESCAIPTIGN Routine Ins ection LOCATIOiV OF AEI.EASE AMOUNT OF ACTIViTY 7 a ,44 45 NA/0 H 7 0 I i C I'FFS!TE CONSEQUENCES 7 0 9 PfweAE SYSTEM CAUSE COMPGICENT CGGE COOS COMPONENT COOE SURYA!ocr!~cs E 9 9 10 i1 172 17 43 44 48 CAUSE OESCRIPTICN

~0!B~The recirculation s stem2B 1iG set motor-fluid drive shaft cou lin E8 7 6 9 LOSS.OR OAVAGE TO FACILITY EH PUBLICITY 03 l.7 6 9 AOOITIOI~AL F/ICTOPS Ci'/09 NA~NA PlI il'.I C.~~ii~6.TIHONIE

0 qcg 4~i'E f~lg (C