ML18283B040

LER 1976-007W-00 for Browns Ferry Unit 2, Alarm Lights Indicating Water Leakage by Accumulator Pistons on HCU 34-43 (6/19/1976), 46-07 (6/21/1976), & 58-35 (7/2/1976)

ML18283B040
Person / Time
Site:	Browns Ferry
Issue date:	07/16/1976
From:	Fox H Tennessee Valley Authority
To:	Moseley N NRC/RGN-II
References
LER 1976-007W-00
Download: ML18283B040 (5)

Text

NRC FORM 195~, U.S, NUCLEAR REGULATORY COMMISSION DOCKET NUMBER I2.70) Jt 50-260 FILE NUMBER NRC DISTRIBUTION FOR PART 50 DOCKET MATERIAL . INCIDENT REPORT DATE OF DOCUMENT N.C.. Moseley 'ennessee Valley Authority Tennessee 'hattanooga, H: S. Fox DATE RECEIVED RELETTER QNOTORIZED PROP INPUT FORM NUMBER OF COPIES RECEIVED

~RIG(NAL BUNG LASS IF IE D 0 co~.TJ DESCRIPTION ENCLOSURE

" Ltr.'rans. the, following....... Licensee event reportl;ROOBFRO-50-260/767 on 6-19-76 .concerning alarm lights indicated

'ater leakage by'he accumulator pistons on HCU Nos. 34-.43 46~07,58-35'..'...............

(1 cy re'cieved)

. 'QI,Q@0T P<~IP~,"

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Units '1'-2

" 10~I'gMr.ace.

'PI%ST NAME Ferry It'rowns NOTE: ~IF.~PERSONNEL EXPOSURE IS INVOLVZDmaznv

, SEND DIRECTLY TO KREGER/J .COLLINS

'NFORMATION FOR ACTION/

RANCH CHIEF: Schwencer

== V ~S FOR ACTION en rZC .~ST.:. epppr V CYS

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INTERNAL D ISTRI BUTION Vi'll~

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-'-. -HAKPLKlR TEDESCO MACCARY SHAO VOLLMIR BUNCH

- .KREGER J. COLLINS EXTERNAL DISTRIBUTION ' CONTROL NUMBER LPDR: 'thens Ala.

TIC: 73.09

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ENNESSEE VALLEY AUTHOiY g'e 'Ct'

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'Pgi p~C ~ ~>c Mr. Merman C. Moseley, Director a 4~ K '%la fyg$~

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U.S. Nuclear Re~~atory Co~;~ssio'n<

Office oi'nsnection and Ecforcemept Region XX Sestet C 230 Peachtree Street, Iffy., 8th Floor@ A~'ear Atlanta, Georgia 30303 Nr. Noseley.

TZNHESSEE VALLEY AUTHORXTY BRO'rTI'l3 FERRY ItUCLEAR PLQiT Ui'KT 2-DOCIET IIO. 50-260 - FACXLXTY OPERATXItG LXCZi';SE DPR>>52 REPORTABLZ OCCURRENCE REPORT BFRO-50-260/76$ '1 The enclosed report is to provide details concerning alarm lights indicating water leaIuge by the accurrtulator pistons on HCU 34-43 (June 19, 1'j76), Il6-.07 (June 21, 1)76), and 58-35 (July 2, i)76)

. 'nd is subbed.tted in accordance with Appendix = to Re~tory Guide 1.16, Revision 4, Au"ust 1975. Kri event occurred on Browns Ferry Nuclear Plant unit 2.

Very truly yours, TEH?ESSEE VALISE AUTHORXTY H. S. Fox Director of Power Production Znclosnre (3)

CC (Enclosure):

Director (3)

Office of Iianage~ent Xnformation and Pro~an Control U.S. Huclear Regulatory Comntission Washington~ D.C. 20555 Director (40)

Office of Xnspection and Enforcement U.S. I,'uclcar Re"ul"tory Cowed.ssion Mashington, D.C. 20555 rg 304/

hn Equal Opportunity Employer

LICENSEE EVENT REPORT CONTROL BLOCK: (PLEASE PRINT ALL REQUIRED INFORIVIATION) 1 6 LC EN 5Lk LICENSE EVENT NAME LICENSE NUMBER TYPE TYPE

[OD~I A L B R ~F2 0 0 0 0 0 0 0 0 0 4 1 1 1 1 ~01 7 89 14 15 25 26 30 31 32 REPORT REPORT CATEGORY TYPE SOURCE DOCKET NUMBER EVENT DATE REPORT DATE

[oagcoMo ~4* L L 0 5 0 0 2 6 0 0 6 1 9 7 0 7 1 2 7 6 7 8 57 58 59 60. 61 68 69 74 75 80 EVENT DESCRIPTION

[002]

7 8 9 The unit was in cold shutdown with all rods inserted. Alarm li hts indicated water I 80

[003] leaka e b the accumulator istons on HCU Nos. 34-43 (June 19 1976), 46-07 (June 21, 7 89 80

[OD4) 1 6 and 58-35 Jul 2 1976 . Each HCU was removed from service and the o-rin s 7 8 9 80 Qo 5 replaced. AFRO 5Q 260 767.

7 8 9 80

[oa~]

7 89 80 SYSTEM CAUSE COMPONENT CODE CODE COMPONENT CODE I0021 ~RB E A 0 0 0 M U N G 0 8 0 Y 7 8 9 10 11 12 17 44 47 48 CAUSE DESCRIPTION Qpg Normal weart failure 7 8 9 80 7 8 9 80 Pia]

7 89- FACILITY METHOD OF 80 STATUS POWER OTHER STATUS DISCOVERY OSCOVERY DESCRIPTION li hts Q~g ~E ~00 o Alarm 7 8 9 10 12 13 44 45 46 80 FORM OF 7

2 8 9

~Z'i ACTIVITY RELEASgO COATENT OF RELEASE 10 J

11 AMOUNT OF ACTIVITY N/A 44 45 N/A LOCATION OF RELEASE .

I 80 PERSONNEL EXPOSURES N A 7 89 11 12 13 80 PERSONNEL INJURIES NUMBER DESCRIPTION

~4 ~oo o N/A 7 89 11 12 80 OFFSITE CONSEQUENCES Qg N/A 7 8 9 80 LOSS OR DAMAGE .TO FACILITY TYPE DESCRIPTION N/A 7 89 10 80 PUBLICITY N/A 7 89 6 80 ADDITIONAL FACTORS PQB N A 7 88 80 N/A 7 89 80 NAME: PHONE:

eFO IRet ~ aeT

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