ML20084T906

LER BFRO-50-259/7615:on 760921,HPCI Tripped & RCIC Failed Surveillance Test.Trip Caused by Leaking Rupture Disc on Steam Discharge Line.Test Failure Caused by Sluggish Governor.New Disc & Governor Installed

ML20084T906
Person / Time
Site:	Browns Ferry
Issue date:	09/30/1976
From:	Fox H TENNESSEE VALLEY AUTHORITY
To:	Moseley N NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20084T908	List: ML20084T906 ML20084T913
References
LER-BFRO-50-259-761, NUDOCS 8306240260
Download: ML20084T906 (2)

Text

n .. . .

D" O LICENSEE EVENT REPORg ,

l l-l l l  ! [pLEASE PRINT ALL REQUIRED INF RMATION) .

CONTROL' SLOCK:l 1 6

" TV LCENSE NUMBER fl l0l1l NAM lA!1,!B!R!Fl1l l Ol 0l-l0 l0 l 0 l 0 l 0 l~l 0l 025l l 4l 1l1l 1l 30 E7 il 9 14 15 26 31 32 EVENT OATE REPORT OATE DOCKET NUMBER CATEGORY 01 cDN'T l__ l l W T E W l 0l 5l 01-l0 l2 l5 l968l l0l9l2l1l7l6l 69 74 l

75 l l l l l 80 l

78 57 58 53 60 61 EVENT DESCRIPTION l

@ l HPCI tripped during testing due to a leaking rupture disc located on the steam dis- SO 7 89 l 9@ l charge line. Following the HPCI trip. the RCIC failed the required surveillance 80

'7 09  ! l h.! emet due to a altiopi ah envernor.

Donctor chutdown was initiated and nressure 60 7 89 l 92 l reduced to less than 100 psi. (BFRO-50-259/7615) 80 7 -89 1

@l - a0 M VOLATON C DE COMPONENT CCCE O7 l Cl Jl W E

lX lX lX l Xl Xl XI y 44 l Xl 9l 9l 9l 47 lYl 48 7 89 10 11 12 17 43 CAUSE DESCRIPTION The l

@ l The HPCI rupture disc cracked as a result of alternating pressure and vacuum.

7 89 l

h l Woodward Governor EG-R on the RCIC malfunctioned. SG '

7 EO- l f bl OTHER STATUS O SCOVERY OSCOvinY OESCRCTON STA 3  % POWER E bH)  ! d d 1I I 12 13 m

44 l Lal 45 I Control Room innunciation 46 80 I '

7 8 9 10 LOCATON OF RE6 EASE ELE EO OF L ASE AMOUNT OF ACTMTV m wA I DE Laj LaJ l I i 80 7 8 3 10 11 44 45 PERSONNEL EXPOSURES NUMBER TYPE OCSCR4PTON H 10l 01 01 LaJ l m 80 I

12 13 7 89 11 PERSONNEL INJUR;ES MD 9t1ER

• DESCRPTON H l 0101 0l 1 m 80 l

7 89 11 12 OFFSITE CONSEQUENCES DE I m 80 7 89 LOSS OR OAMAGE TO FACluTY

- M PE CESCR* TON 8 I al I m 80 l

7 8 '

PU8uCITY ,

9306240260 760930 PDR ADOCK 05000259 PDR l s g

@l y-gg

• 00 ADDIT!ONAL FACTORS

- @ lA new rupture disc with a vacuum support was _ installed on the.HPCI. A new Woodward l

80 7:.09-

'h.he,rnorEG-RwasinstalledontheRCIC. Both operated satisfactorily following repairs.]0

7'89

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+ 9 TENNESSEE VALLEY AUTHORITY J #

• c CHATTANOOGA. TENNESSEE 37401 g%

///6-19 8

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Septetber.30, 1976 4 g

rec $vE0*

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OCT 5 1976 4 Mr. Non.an C. Moacley, Director U.S. Nuclear Ec D tory Couaission  ;;i 584MIMMus P O

' D office of Inapection and Enforecx.nt Rocion II d7 6

230 Feachtroo Stroct, IET., 8th Floor Atlanta, Goorgia 30303 II 01 Dear Mr. Moseleb TZtilIESE VAILEY AUTIIORITY - BROLTIE FERY NUCIIAR FIANT LEZIT 1 -

DOCET H0 50-253 - FACTTT'" nWPATHIG LICCGE DPR REPORTABLE OCCURRaK:ERCEORTB7E0f259/7&

The enclosed report is to provido details concerning the HPCI that tripped during testing due to a lonHng rupture disc located on the stcaa dischargo line. L'ollowing the HFCI trip, the ICIC failed the required curveillance test due to a slucJish governor. Tais report in sub::.itted in accordance with Brcr. ins Ferry Technical SI.ccifications Section 6. 'fnia cycnt occurred on Browna Ferry Nnninnv Plant unit 1.

Very truly yours, TENESSE VALIEY AUIHORITY E. S. Fox Director of Power Freduction D Enclosure (3)

CC (Enclosuro):

Director (3)

Office of Manacecent Inforation and Program Control U.S. Nuclear Regulatory Cor.uission i

Washington, D.C. 20555 THvoeter(40)/

4 Office of Inapection and Ihforcecent

' U.S. Nuclear Regulatory Cox.ission washincton, D.C. 20555 l

E f

COPY SENT REGION k_ @fl2 An Equal Opportunit,r Employer *

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