ML18283B009

LER 1977-010-00 for Browns Ferry Nuclear Plant, Unit 2, Drywell Oxygen Sensor 202M-76-43 Became Erratic During Normal Operation, Which Is Supplement to Previous Letter of 8/1/1977

ML18283B009
Person / Time
Site:	Browns Ferry
Issue date:	09/14/1977
From:	Fox H Tennessee Valley Authority
To:	O'Reilly J NRC/IE, NRC/RGN-II
References
LER 1977-010-00
Download: ML18283B009 (2)

Text

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~i TENNESSEE VALLEY AUTHORlTY O m CHATTANOOGA. TENNESSEE 3740t

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September lit, 1977 Mr. James P. O'Reilly, Director SS g@o U.S. Nuclear Regulatory Commission Office of Inspection and Enforcement Region II 230 Peachtree Street, NW., Suite 1217 Atlanta, Georgia 30303

Dear Mr. O'Reilly:

TENNESSEE VALLEY AUTHORITY - BROWNS FERRY NUCLEAR PLANT UNIT 2-DOCKET NO. 50-260 FACILITY OPERATING LICENSE DPR-52 REPORTABLE OCCURRENCE REPORT BFRO-50-260/7710 The enclosed report is a supplement to my letter dated August 1, 1977, concerning drywell oxygen sensor 202M-76-43 which became erratic during normal operation. This event occurred on Browns Ferry unit 2.

Very truly yours, TENNESSEE VALLEY AUTHORITY H. S. ox Director of Power Production Enclosure (3) cc (Enclosure):

Director (3)

Office of Management Information and Program Control U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Director (40)

Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D,C. 20555 An Equal Opportunity Employer

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Update Re rt - Previous report dated 08017~7 9/29/76 CONTROL BLOCK: (PLE~PRINT ALL REOUIRCO INFORMATION) 1 6 LCENSEE Ucf NSF EVE NI NAME LICENSE NUMIIEA tvPI t'I PI h L J R i' 0 0 0 0 0 0 0 0 0 4 1 ~03

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14 15 25 26 REPOAt AfPQIII 32/'f<<OAr CAST COAv TYPE SOURCE OOCIIET NUMIIfR EVENT GATE Oarr Nr 0 5 0 02 6 0 i0 7 1 2 7 7 0 9 1 4 7 7 57 58 59 60 61 68 69 74 75 80 FycNT OESCRIPTION

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's 's a su lemental re ort to BFRO 50-260/7710.

CI FG 8 9 PAME BC Sr STEM CAUSE COMPIINENT COMoONENT CCDE COOE COMPOVE Nt COOE SUPPUE A MANUFDCIQKA r~oi; !I~

~y.r i .: o T R U Q 0 8 0 9 10 11 12 17 43 CB CAUSE OESCRIPTIOtJ lj l The I'E Model 47E22641031 oxygen sensor was sprayed with cooling water from 3 9 recirculation pump "B", which caused erratic reading. Leak was repaired and 1

sensor re laced.

9 fACILITY METHOO OF SIAYUS POWER O'THER STATUS OISCOVEAY OISCOVERY OESCRPTIOi

~Z ~Or) I N/A 0 erator observation 9 10 12 13 44 45 46 80 iCAM Of tiVITY CONTENT RT,EASED OF II LEASE AMOUNT OF ACTIVI'TY LOCATION Oi RELEASE l~z A N/A .'l/h 9 10 11 44 45 80 PERSONNEL EXPOSURES

'Iir IPFA TYPE OESCRIPTION I

~oo o 1'I N/A 3 12 '13 PERSONNEL INJUR!ES i:.Va! A Of SCR'IotION

[0 9

~00 N/A 11 12 80 OFFSITE CONSEOUENCES N/A 3 eo L =S OR OAMAIiE TO FACILITY CI Si:4 I'r:CV

~z N/A 1U 80 t'L 3'CITY

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