ML20084U261

LER BFRO-50-296/762:on 760723,control Rod Drive Pump Removed from Svc to Permit Installation of Strain Gauge Instrumentation on Selected Fuel Channels.On 760727, Accumulators Found Inoperable

ML20084U261
Person / Time
Site:	Browns Ferry
Issue date:	08/06/1976
From:	Fox H TENNESSEE VALLEY AUTHORITY
To:	Moseley N NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20084U265	List: ML20084U261 ML20084U269
References
LER-BFRO-50-296-762, NUDOCS 8306280393
Download: ML20084U261 (2)

Text

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, LICENSEE EVENT REPORT CONTROL BLO  ! l l l l l [PLEASE PRINT ALL CEOUIRE3 INFORMATION) 1 6

1. • - '/' $AME LEENSE NUMBER TV 1 0 l AI LlB lR lF l3 l 14 l0l0l-lOlOl0l0l0l-l0l0l 15 25 l 4l1 l ll ll130l 28 10 11I 31 32 7 89 OOCKET NUMBER EVENT DATE REPORT DATE CATE00RY T7P R O CON T l l l y lL j l 0 l 5 l 0l-l 0l2 l9 l6 l 68 l0 l 7 l 2 l 3 l 7l 6l 69 74 l

75 l l l l l 80 l

7 8 57 58 59 60 61 EVENT DESCRIPTION gg l On 7/23/76, the control rod drive pump was removed frcan service to permit the l 7 89 80 35 l installation of strain gauge instrumentation on selected fuel channels. On l 7 89 80

][ l 7/27/76, Surveillance Instruction 4.3.A.2-d determined the control rod l 7 89 80 DE l accumulators to be inoperable due to low pressure without the requirements of l 8j di LC033A2b being met. (BFRO-50-296/762)

D COMPONENT CODE AC R VOLATION CODE DE I 91Bl (A] lC I R l DlRlV lE l W l Gl O l 8 l 0l y 7 89 10 11 12 17 43 44 47 48 CAUSE DESCRIPTION DE l The requirement of LC033A2b was overlooked by plant personnel when the l 7 89 80 hl 7 89 work was apOroved.

80 l

MI I STA S  % POWER OTHF1 STATUS DISCOVERY DISCOVERY OESCRIPTON 1

Lut) 1010101 I ra I lsJ l na l 7 8 9 10 12 13 44 45 46 80 LE EL ASE AMOUNT OF ACTMTV LOCATON OF RELEASE H L z3 OF10!aJ11l ra l l ra l 7 8 9 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE DESCAIPTON DE 101010 i LzJ l nr l 7 89 11 12 13 80 PERSONNEL INJURIES NUMDEA DESCAiPTON DE l 0l0 l0 l lla 80 l

7 89 11 12 OFFSITE CONSEQUENCES D2 I E 80 l

7 89 LOSS OR OAMAGE TO FACiUTY TYPE DESCAsPTON 8 La J 10lia 7 89 80 l

PUBLICITY 8306280393 760806 0500029 g g [ NA gDR ADDCK 7 88 80 ADDITIONAL. FACTORS H l Although the control rods were not d'icarmed, with the CRD pumps off, the rod l 7 89 80

@ l could not be moved. l 7 89 80 NAME: PHONE:

seo ess.es7

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,epwuo m g, (- ,

TENNESSEE VALLEY AUifiORITY f h{o f-2 g g gyILE COPY

c. ,4 $ '

CHATTANOOGA. TEf4NEGSCE 37401 w.#

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Aucant 6, 1976 $g 'k>/

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D' AUG 0 1976 O IIr. IIorrna C. Ibsoley, Director U.S.1:ncicar Regulaton Cornission %yyy ku.s.nonianncnica$

Offico of Incpection and Inforcement Region II p(',/

230 Peachtree Gtreet, Ef., 8th Floor ./jjj[g#g\7, Atinnta, Coorcia 30303

Dear 14r. Ibsoley:

TEUiECSEE VALIZY AUDIORITY - BIl0 zig FERRY IMCImR PL*.I;T WIIT 3 -

DCCET If0 50-296 - FACILITl OPZEATIHO LICEi13E DPR REPORTABLC OcCURRE:!CE R20IC ICRO-50-2%/7631 The enclosed report in to provido details concernhig the centrol rod drivo incp which was reruved frcut acrvice to parmit the installation of strain cauce instru.r.cntation on selected fuel channcic and in culnitted in accordanco with Lirpendix E to Regulatory Guido 1.16, Rovinion 4, Au,T,1ct, l'7/5. Thio event occurred on Browns Tcrq Uuclear Plant unit 3.

Very tndy youra, TEEiESSEC VAILLY AUIIIORIYl II. B. Fox Director of Power Production Diclocuro(3)):

CC(Enclocuro (,

Director (3)

Offica of 1%nncenent Infonation and Progran Control U.S. liuclear Ecgulatory Cormincion Wachhicton, D.C. L'0555 ,

<Dirtetor (150) -

Offico of Inapection anil Enforeccent U.S. !!uelear Ecculatory Conniacion Waohim; ton, D.C. 20555

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1. #5t ,

An Equal Opportunity Employer 80S'7 t __ _ . r, ,