ML18283B433

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

ML18283B433
Person / Time
Site:	Browns Ferry
Issue date:	07/21/1977
From:	Fox H Tennessee Valley Authority
To:	Moseley N NRC/RGN-II
References
LER 1977-007-00
Download: ML18283B433 (6)

Text

U.B. NUCLEAR REGUI.ATORY COMMISSION DOCKET NUMBER NRC FOI'M 195 g 7SI 50-FILE NUMBER

. gBCOISTRIBUTION FoR PART 60 DOCKET MATERIAL INCIDENT REPORT TO: FROM: DATE OF DOCUMENT Tennessee Valley Authority 6/7/77 Mr. Norman C Moseley Chattanooga, Tennessee DATE RECEIVED Hi ST Fox 6/9/77 QLETTER NOTOR IZED PROP INPUT FORM NUMBER OF COPIES RECEIVED OORIGINAL N C LASS I F I E D

~GAY I DES C RIP T I 0 N ENCLOSURE

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.. License'e,Event Report (RO 50-296/777) on" '

l 5/18/P7I:con'cerning torus oxygen sens'or..".- I t

I failing't"'O'glib'rate to two percent oxyg'en calibration gas ~ ~ ~ .'

PLANT NAME:

NQ NOT REMOVE Browns Feiry Unit No .3 (1:-P) (x 3) AQKÃ0%L>D RJL 6/10/77 NOTE. IP PERSONNEL EXPOSURE IS INVOLVED SEND DIRECTLY TO KREGER/J, COLLINS FOR ACTION/INFORMATION BRANCH CHIEF! C CaJ C.n Cc.

W 3 CXR ROR ACTXON LICo ASSTo:

W CYS ACRS /C CYS INTERNAL D IST RIBUTION REG PILE ~ 0 ~ i NRC PD

~&M. 2 MIPC SCHROEDER/IPPOLITO HOUSTON NOVAK/CHECK GRIMES BUTLER HANAUER TEDESCO/MACCARY EISENHUT BAER

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SHAO VOLLMER/BUNCH KREGER/J COLLINS EXTERNAL DISTRIBUTION CONTROL NUMBER LPDR TIC:

NRC FORM 195 Ig.74)

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t TENNESSEE VALLEY AUTHORITY CHATTANOOGA. TENNESSEE 37401 t

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J11Ly 21 p 1977 5'PP ~oj Mr. Norman C. Moseley, Director U.S. Nuclear Regulatory Commission Office of Inspection and Enforcement Region II 230 Peachtree Street, NW., Suite 1217 Atlanta, Georgia 30303

.Regulatory Dooke

Dear Mr. Moseley:

TENNESSEE VALLEY AUTHORITY - BROWNS FERRY NUCLEAR PLANT UNIT 3 DOCKET NO. 50<<296 FACILITY OPERATING LICENSE DPR-68 REPORTABLE OCCURRENCE REPORT BFRO-50-296/777 The enclosed is a,followup.report to my letter dated, June 7, 1977, concerning. torus oxygen sensor 0 M-76-42 which failed to calibrate to 2-percent oxygen ca1dbratdon-Ias dnrdng normal operatdon.

Very truly yours, TENNESSEE VALLEY AUTHORITY 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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'ONTROL 8LOCK: (PLEASt TpiZINT ALL REQUIREO Ih!FOR'sTATIOIII3 1 6 uctastt UPDATE REPORT - PREVIOUS REPORT DATE June 7, 1977 EVENT NAME LCENSE NUMSER TYPE TYPE

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89 14 15 25 .26 30 31 32 I REPORT REPORT J CATEGORY TYPE SOURCE OOCKET NUMBER EVENT OATE REPORT OATE boa~]comv b L 0 5 0 0 2 9 6 0 5 1 8 7 7 3 57 58 59 60 61 68 69 74 75 l

EVENT OESCRIPTION fgg~l 'uring normal operations, t'orus oxygen sensor 0 N-76-42 2

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 QO 4 This is a re etitive occurrence. Invest% ation showed FCV-76-42B not functionin 8 9 80

-Qog 7 8 9

~06 j7 8 9 PIEVIE SYSTEM CAUSE COMPONENT COMPONENT t CGOE COOE COMPONENT COOE MAPIUFACTURER VIOLATGN

'<<~07 I~TE ME 2 N 5 T R MN A 6 1 0 ~N 8 9 10 11 12 17 43 44 47 48 CAUSE DESCRIPTION

~~OB ASCO solenoid valve, SN 97009 A, Catalog No. HT8262A-203K, TVA No. FSV-76-42B was 9 9 80 JQp Sj found to leak instrument air to sensor, resulting in greater than 2 percent oxygen 7 8 S 80

",~c o I calibration atmosphere. valve was reworked and sensor calibrated correctl

,7 8 9 80 FACILITY METHOO OF STATUS POWER OTHER STATUS OISCOVERY OISCOVERY OESCRIPTION

,~E ~09 O N/A b Surveillance Testing 9 10 12 13 45 46 60 FORM OF ACTIVITY CONTENT RE'ASEO OE RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE

-,t11g ~Z Z . N/A N/A I7 8 9 10 11 44 45 80 PERSONNEL EXPOSURES

'tired) N/A

'77 8 9 12 13 PERSONNEL INJURIES a euu(ER otsca ance N/A 9 11 12 OFFSITE CONSEQUENCES N/A 9 60 LOSS OR OAMAGE TO FACILITY "El TYPE Z

DESCRIPTION N/A

,.7 8 9 10 60 PUDI.ICITY N/A 7,89 b0 AOOITIONAL <ACTORS N/A

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