ML20084T871

LER BFRO-50-259/7621:on 761006,RHR Pump Discharge Pressure Switch PS-74-8A Found Inoperable.Caused by Binding Plunger. Switch Replaced & Tested Satisfactorily

ML20084T871
Person / Time
Site:	Browns Ferry
Issue date:	10/07/1976
From:	Fox H TENNESSEE VALLEY AUTHORITY
To:	Moseley N NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
LER-BFRO-50-259-762, NUDOCS 8306240228
Download: ML20084T871 (2)

Text

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. LICENSEE EVENT REPORT c .

CONTROL DLOCX:l } l l l l l QEASE PRINT ALL REEUIRED INFoRMAllON)

, ,- 1 6 E TV E kUE l0j0l LCENSE NUMBER j0l0l0j0l0l_j0l0l l4l1l1l1l1l l0l3l 32 26 30 31

) ]8 9l A lL lB l R 14 j F [1l 15 25 REPORT DATE EVENT DATE hou DOCKET NUMBER l l l

l0 l5 l0 l-l0 l2 l5 l960l l1 l0 l0 l617 l674l CATEGORY TvPE E l l l l l QCON f l57 l 58 l 859 lL l 60 61 69 75 80

7 8 EVENT DESCRIPTION 'l l g l During startup testing at 1300 MWt, PS-74-8A (RHR pump discharge EO press 7 89 -

l Three of four. redundant switches were operable. 6D

g l found -inoperative.

7 89 l E3 Q l (BFRO-50-259/7621) i7 89

~ @Sj l 60 l

7 89 B0

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7 09 MAA R VOLATON gg l C J F l ]

ot CODE COMPONENT CODE l Il Nl Sl Tl Rl Ul17 lN l lS l 3l 8l 2l g48

' 43 44 4/

7 89 10 11 1,2 CAUSE ' DESCR;P T:ON '

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(o@ l Pressure switch PS-74-8A failed to operate wh'en tested due to binding plunger.E3 7 89 _jgo

@ l Static-0-Ring Model SN-AA3-0/450 psi ,

7 89 f 0

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. B9- METHOD OF Of5COVERY DESCAPTON FActITY

% POWER - OTHER STATUS Status J OCCOVE54Y .l 7 8 1 +

d 9 .

d 3l9l12 13l 10 NA l 44 LnJ 45 46 50 ACTMYY CONTENT LOCATION OF RELEASE RELFASED OF RELE ASE AMOUNT OF ACTMTV l

-7 h U O d W! 10 11-NA l 44 45 l NA EO

. PERSONNEL EXPOSURES NVMSCA TYPE DESCRiPTON  !

~ NA 8 .10 10 10 11i Lz_J l SD 7 89 12 13 PERSONNFL INJUAlES flVMOEA DESCP4PTON NA l Q l0 l0 10 l 7 UU 11' 12 l

OFFSITE CONSEQUENCES l NA-

@l 7 89 00 LOSS OR CAMAGE' TO FACILITY

• TYPT DESCRIPTON l NA h k!

7 09 l

to co PueuciTv B306240228 761007 .

PDR ADOCK 05000259 PDR ._d

. .b 7DD i S , _NA ADulTIONAL FACTORS I h l This is not a repetitive occurrence and thTe entire switch was replaced and CO 7 80 g

[ g [ tested satisfactorily. a) 7- 00  !

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CHATTANOOGA TENNESgEE 37401 IE FTLE COPY

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N W October 27, 1976 G G \

Mr. Norman C. Moseley, Director U.S. Nuclear Regulatory Cocnission 9 gy1

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Office of Inspection and Enforcement Region II \ f, , '*N O 230 Peachtree Street, NW., 8th Floor ,( 72s. , Y Atlanta, Georgia 30303 9h55 -

Dear Mr. Moseley:

TENNESSEE VA AITTHORITY - BROWS FERRY NUCLEAR PLANf UNIT 1 -

DOCKET NO. 0-259 FACILITY OPERATING LICENSE DPR RETORTABLE OCCURRENCE P2 PORT BFRO-50-259/7621 The enclosed report is to provide details concerning the PS-74-8A (RHR pump discharge pressure switch) that was found inoperative during

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startup testint; at 1300 MWt. This report is submitted in accordance with Browns Ferry Technical Specifications Section 6. This event occurred on Browns Ferry Nuclear Plant unit 1. -

Very truly yours, TENNESSEE VALLEY AUTIl0RITY l.

H. S. Fox l Director of Power Production i

Enclosure (3) -

1 CC (Enclosure): '

Director (3)

• l- Office of Man gement Information and Program Control U.S. Nuclear Regulatory Cocnission f Washington, D ,C. 20555 Di_r_eqqt_f400 Office of Inspection and Enforcement U.S. Nuclear Regulatory Commissica

. Washington, D.C. 20555 '

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i 11086 An Equal Oppor tumty I mployer

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