ML18283B430

LER 1977-007-00 for Browns Ferry Nuclear Plant, Unit 3, Torus Oxygen Sensor O2M-76-42 Failed to Calibrate to 2-Percent Oxygen Calibration Gas During Normal Operation

ML18283B430
Person / Time
Site:	Browns Ferry
Issue date:	07/21/1977
From:	Fox H Tennessee Valley Authority
To:	Moseley N NRC/IE, NRC/RGN-II
References
LER 1977-007-00
Download: ML18283B430 (6)

Text

U.S. NUCLEAR REGULATORY AMISSION DOC ET NUM/}ER NRC FQRM 195 (2~>6)

TO:

%RC DISTRIBUTION FOR PART 50 DOCKET MATERIAL FROM:

fear FILE NUMBER INCIDENT REPORT DATE F DOC MENT Tennessee Valley Authority Mr. Norman C Moseley Chattanooga, Tennessee DATE RE EIVED Hi ST Fox 7/25/77 LETTER O NOTORIZED PROP INPUT FORM NUMBER OF COPIES RECEIVED OORIGINAL UNCLASSIFIED COPY DESCRIPTION ENCLOSURE Licensee Event Report (RO 50-296/777) on 5/18/77 concerning torus oxygen to Dalib o two oxygen sensor'ailing calibratio~

PLANT NAME:

Browns Ferry Unit No 3 uI Ia) (Qk5~

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RJL 7/26/77 NOTE: IP PERSONNEL EXPOSURE IS INVOLVED SEND DIRECTLY TO KREGER/J, COLI INS FOR ACTION/INFORMATION BRANCH CHIEF:

W 3 CYS POR ACTION LIC~ ASST+'.

W CYS ACRS CYS %5MHC S INTERNAL DISTRIBUTION REG PILE NRC PDR I & E 2 MIPC SCHROEDER/IPPOLITO HOUSTON NOVAK/CHECK GRIMES BUTLER HANAUER TEDESCO/MACCARY EISENHUT BAER SHAO VOLLMER/BURGH KREGER/J ~ COLLINS EXTERNAL DISTRIBUTION CONTROL NUMBER LPDR:

TIC:

N NRC FORM 195 I2-76)

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.,~Z~z- telA Hr. Honnan C. Mo ey, Director U.S. Huclear ulatory Commission Office of pection and Enforcement Region XX 230 Pea tree Street, Kf., Suite 1217 Atlan , Georgia 30303

Dear hIr. Noseley:

TENNESSEE VALLEY AUTHORXTY - BROOM FERRY HUCLEAR PLAHT UHIT 3-DOCKET HO ~ 50-296 PACXLXTY OPERATING LICEHSE DPR-68 REPORTABLE OCCIIEHCE REPORT BPRO-50-296/777 The enclosed is a followup report to my letter dated 'June 7, 1977, concerning torus oxygen sensor 0 N-76-42 which failed to calibrate to. 2 par-cant orytan calibration Qa daring norna1 oparation ~

Very truly yours, TEHHESSEE VALLEY AUTHORITY DOCKET FILi-:

H. Sc Pox Production'EGULATORY Director of Power Enclosure (3) cc (Enclosure):

Director (3)

Office of Hsnagement Information and gram Control U.S. Huclear Regulatory Comnission Ifashington, D.C. 20555 Director (40)

Office of Inspection and Enforcenen U,S. Huclear Regulatory Commission Ilashington, D.C. 20555 An Equal Opportunity Employer

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PENSEE EVENT REPORT- 9/29/76 CONTROL BLOCK: (PLEASL'PRlhlT ALL REOUIRED INFORss)IATIDN) 1 6 UCENSEE UPDATE REPORT PREVIOUS REPORT DATE June 7, 1977

~ NAME LICENSE NUMSER TYPE TYPE

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01 A L B R F 3 0 0 0 0 0 0 0 0 0 4 1 1 1 1 LEO~ J

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89 14 15 25 .26 30 31 32 I REPORT REPORT J CATEGORY TYPE SOURCE OOCKET NUMBER EVENT DATE REPORT OATE

~D1 tONV ~L L 0 5 0 0 2 9 6 0 5 1 8 7 7

.7 3 57 58 59 60 61 68 69 74 75 80 EVENT OESCRIPTION f002I 'uring normal operations torus oxygen sensor 02M-76-42 failed to calibrate to two 7 8 9 80

[Op/ percent oxy en calibration as. A redundant h dro en sensor in torus is o erable.

7 89 80

~0 4 This is a re etitive occurrence. Investi ation showed FCV-76-42B not functionin 8 9 80

-Qoi 7 8 9 m+06 I7 89 PRV)E 80 SYSTEM CAUSE COMPONENT COMPONENT COMPONENT COOK SUPPLER MANUFACTURER V)OIAT)ON fccrI COOK I~RE COOK E l N 0 T R ~N A 6 1 0 ~N 8 9 10 11 12 17 43 44 47 48 CAUSE DESCRIPTION i~99 fgg I7 ASCO solenoid valve, SN 97009 A, Catalog No. HT8262A-203E, TVA No. FSV-76-42B was 80 I~

~~p 9 found to leak instrument air to sensor, resulting in greater than 2 percent oxygen 7 8 9 80

')Ltto I calibration atmosphere Va.lve was reworked and sensor calibrated correctl

,7 8 9 80 FACIUTY METHOD OF, i STATUS 9I POWER OTHER STATUS O)SCOVERY ~ 'SCOVERY OESCR)PTION E ~09 0 N/A ~b Surveillance Testing 9 10 12 13 44 45 46 80 FORM OF ACTIVITY CONTENT RELKASEO Oc RELEASE AMOUNT OF ACTIVITY LOCATION OF RcLKASK

-;t11g Z ~Z . N/A N/A

/ I7 8 9 10 11 44 45 80 PERSONNEL EXPOSURES N/A

)7 8 9 11 12 13 80 PERSONNEL INJURIES NUI0is 'iscflinoa ~ '

N/A

.)7 8 9 11 12 80 OFFSITE CONSEQUENCES CQ N/A 60 LOSS OR OAMAGE TO FACILITY TYF'E OESCR)PTION 6 Z N/A

.7 8 9 10 60 PUBLICITY N/A 7 89 b0 AOOITIONA'CTORS N/A

,7 89 60

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89 60