ML20084U038

Followup LER BFRO-50-296/7618:on 761117,torus Oxygen Sensor Failed to Respond Properly to Calibr Gas During Surveillance Testing.Caused by Misalignment of Sensor & Calibr Piston Assembly.Corrective Actions Not Stated

ML20084U038
Person / Time
Site:	Browns Ferry
Issue date:	01/26/1977
From:	Fox H TENNESSEE VALLEY AUTHORITY
To:	Moseley N NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20084U041	List: ML20084U038 ML20084U044
References
LER-BFRO-50-296-761, NUDOCS 8306270025
Download: ML20084U038 (2)

Text

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UCEgEE EVENT REPORT FLE^!IE PRI ALL RE'*UIRED INFOR M ATION)

CONT 5tOL ELOCK l  ! l l l l },

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YPE TvPE ECFNSE NUMBEA

{ ' A l L l B l Rl Fl .3l A.1 l 0l 0l__l0 l0 l0 l0 l0 l_l 0 l 025l l4l1]1l1l1l 26 30 l 0l 3l 31 32 7 89 ,14 - 15 EVENT OATE AEPOAT CATE DOCKET NUMBEA CATECCRY T U l 0I sI 0l-I oI 2l 9l 6l l1 l1 l1 l7 l7 l 6.74l l l l Il l l EtowT I5 7. I. 58I ekJ 7 3 s59 L2J

, 61 68 69 75 60

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EVENT OESCF5PTj0t ' E.'

l Mil l During start, _- ting the torus oxygen sensor failed to respond properly to calibrc- 80

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The redundant hydrogen sensor was l

@ ! tion gas whu'8'perfoIvaine a surveillance test.

60 7 89-Inspection of sensor and calibration ofston l h l operable. This is a repetitive probicin. 80 7 55 l EFFO-50-296/7618 lrecuires shutdntm uithin 10 dnv< to detominn ennse. 80 7 S9 l bI 7 C9 pgyg 80 COMPGNENT CCVPONENT SYSTEM CAUSE SUPPUER MAP.uFACitJ4A VOLAfoN C004 Q l 11 Ej lEl COCE COMPONENT CODE l 1l Nl Sj % Ij U l (Nl 43 44 lGl0l8l0l47 W48 7 89 10 11 12 17 CAUSE DESCRIPTION l

. Q l Misalignment of sensor and calibration piston assembly. 80 7 89 - l ml SO 7 G9 I FI 7 9 METHOD OF 80 FACLITY OtSCOVERY OtSCOVEAY CESCA.PTION STATUS  % POWER OTHER STATUS

@ lB l l0l 7l 1l l NA l lBl l Surveillance Test 60 l

7 8 9 10 12 13 44 45 46

((1 vif Y CONTENT LOCATCN OF AELEASE REsEASED OF RE LE ASE AMOUNT OF ACTVRY NA l 12 7 8 lZ l 9

Wl10 11 NA 44 l l 45 80 PERSONNEL EXPOSURES NuveE4 TYPE DESCRnPTION NA l 33 l 0l 0] 0l yl 80 7 89 11 12 13 PERSONNEL INJURIES

• huYeEA DESCAIPTON E I l 0l 0l O! l NA 60 7 89 11 12 OFFSITE CONSECUENCES ~ *

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NA l M l eo 7 89 LOSS OR OAMAGE TO FACILITY TYPE CESCA.PT ON I

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l 80 7 89 'O 8306270025 770126 PUBLICITY PDR ADOCK 05000296 8 PDR NA . l 3 l 80 <

7 89 .

AOGITiGNAL FACTORS . .

12/16/76. l

-] l This is a followup report - details not available on previous report dated 80 7 89 '

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Janeary 26, 1977 .

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, g'* Sec., gg,,J N,2S 1977.

Mr. Norman C. Moseley, Director Wh' tu di U.S. Nuclear Regulatory f*nnsaf saion ,' b .'

Office of Inspection and Enforcement .

Y Eegion II -

230 Peachtree Street, NW., Suite 1217 Atlanta, Georgia 30303 -

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Dear Mr. Moseley:

TENNESSEE VALLEY AUTHORITY - BROWNS FERRY NUCLEAR PLANT UNIT 3 -

DOCEET NO. 50-296 - FACILITY OPERATING LICENSE DPR REPORTABLE -

OCCURRENCE REPORT BFRO-50-296/7618

, The enclosed report is to provide details cancerning the torus oxygen sensor that failed to respond properly to calibration gas while a

surveillance test was being performed during startup testing. This is a followup of our letter dated December 16, 1976. This report is submitted in accordance with Browns Ferry Technical Specifications Section 6. This.

event occurred on Browns Ferry Nuclear Plant unit 3.

f j , Very truly yours, _

TINNESSIE VALLEY AUTHORITY

• l . .

'N. 8. Fox Director of Power Production

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, Enclosure (3)

CC (Enclosura): .

Director (3)

Office of Management Information and Program Control U.S. Nuclear Regulatory Coussission Washington, D.q. 20555

_ Director (40) > '

Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission '

Washington, D.C. 20555 985 I An Equal Opportunity Employer

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