ML20084U137

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LER BFRO-50-296/767:on 760824,rupture Disc on Steam Discharge Line of HPCI Turbine Ruptured.Caused by Pressure Buildup in Exhaust Line Due to Bound Swing/Check & Stop Check Valve.Valves Repaired
ML20084U137
Person / Time
Site: Browns Ferry Tennessee Valley Authority icon.png
Issue date: 09/22/1976
From: Fox H
TENNESSEE VALLEY AUTHORITY
To: Moseley N
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
LER-BFRO-50-296-767, NUDOCS 8306270064
Download: ML20084U137 (2)


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LICENSEE EVENT REPORT CCNTROL CLCCK:l l

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PLtASt P:llTJT ALL REOti!RLD INFor!.iATIOTJ) 6

.1 LCENSE EVENT ticENSEE TYPE TYPE LCENSE Nut /t:EA lAlLlBlR]Fl3l l 0l 0l-l O! O! 0l 0] O!-l O! O_!

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4AME 2h 26 30 31 32 01 gg

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ll 50 CATEGOAY 60 69 74 75 80 7 8 57 58 69 60 61 EVENT DESCR:PTION "l

g l During a startup test run on the unit 3 HPCI turbine, the rupture disk located on the 60 High exhaust pressure turbine trips occurred on l

7 -89 Q l steam discharge line ruptured.

60 l

7 89 BFRO-50-296/767.

80 Q l cubsequent runs.

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R VOL.ATON DE ODE COMPONENT CODE Q lC]Jl d

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-CAUSE DESCR'PTION e exhaust line were binding which caused l

Q l A swing / check and/or a stop. check valve in th' 60 7 89 l

Q l a pressure buildup in the exhaust line.

EO 7 09 EE I OtSCOVERY OESCA.PTCN S

% POWEn tiutR STATUS OtSCOVEAY W

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Control Room Annunciation l

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10 12 13 44 45 46 LOCATON OF RELElSE LIASE l NLEIS O

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I AMOUNT OF ACTMTY NA l

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10 11 PERSONNEL EXPOSURES m MOEA TYPE DESCRsPTON f@ 10 l 0 j 0 l Jl

- NA 6C 7 09 11 12 13 PERSONNEL INJUR!ES NoMOE A DESCAPION VA

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l 7 C0 11 12 OFTSITE CONSEQUENCES NA

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7 60 LOSS OR CAMAGE TO FACluTY TYPE CESCR# TON NA

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'1 7 Bu ADCITIONAL FACTORS

,h l The HPCI was run satisfacCorily after repair of valves.

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Q TENNESSEE VALLEY AUTHORITY h

CHATTANOOGA. TENNESSEE 374ol Q

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Bopto.her 22,1][6 9

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Mr. Nor.can C. Mosoley, Director 6

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U.S. Nuclear Reculatory CcE:uission

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1 Offico of Inspection and Ihforcocent

.SEP271976, Eccion II

[ v.s.g'g' I 230 reachtreo ctroot, W., 6th noor am m Atlanta, Georgia 30303 g

Dear Mr. Moscley:

E TIHEESSIS VALLEI AUDIORITY - B3GlIG ER3r UUCLW1 FIAliT WIT 3 -

DOCKET H0 50 1%CILITY OITSATIIU LICSUE DIR REPORTABLE OCCURETC3 REPORT BFRO-50-296 767

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The enclosed report is to provido details concerning the rupture dish located on the stcau discharco lino that ruptured during a startup test run on the unit 3 ICCI turbine. Thic report in cuhaitted

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in acco1Quico with Browns 2crry Technical Specifications Section 6.

'Ahla event occurreu on urowns xcrry tiuclear clant unic 3.

Very truly yours, I

TREEGGZa VALLEY AIMIORITY H. 8. Fox Director of Fcuor Iroduction 1

l Enclosure (3)

CC(Enclosuro):

Director (3) 01Tice of ihnace:acnt Infor:ation and FroGram Control U.S. Ihclear Regulatory Cominaion Washington, D.C.

20555 Director U d 4

Offico of Inspection and Ihforco.ucnt U.S. Hucloar ncJulatory Cocnission 9775 Washington, D.C.

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GOPY SENT REGIO t

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An Lqual Opportunity Employer

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