ML18283B010

LER 1977-010-00 for Browns Ferry Nuclear Plant, Unit 2, Drywell Oxygen Sensor 202M-76-43 Became Erratic During Normal Operation

ML18283B010
Person / Time
Site:	Browns Ferry
Issue date:	08/01/1977
From:	Fox H Tennessee Valley Authority
To:	Moseley N NRC/IE, NRC/RGN-II
References
LER 1977-010-00
Download: ML18283B010 (6)

Text

NRC FQRM 196 U.S. NUCLEAR REGULATOR MISSION DOC ET NUMBER (2 76)

FILE NUMBER NRC DISTRIBUTION FoR PART 50 DOCKET MATERIAL 0 TO: FROM: DATE OF DOCUMENT tTennessee Valley Authority 8/1/77 Mr. Norman C+ Moseley Chattanooga, Tennessee DATE RECEIVED H+ ST Fox 8/19/77 g4.ETTE R QNOTORI2ED PROP INPUT FORM NUMBER OF COPIES RECEIVED RIG INAL UNC LASS I F I E D COPY DESCRIPTION ENCLOSU RE Licensee Event Report (RO 50-260/7710) on 7/12/77 concerning drywell oxygen 'sensor 202M-76-43 becoming erratic in operation ~ ~

PLANT NAME:

Browns Ferry Unit No~ 2 RJL 8/19/77 (1-P) (1-P)

NOTE: IF PERSONNEL EXPOSURE IS INVOLVED SEND DIRECTLY TO KREGER/J. COLLINS Ghl . ec 'J FOR ACTION/IN ORMATION INTERNAL D IST Rl BUTION EXTERNAL DISTRIBUTION CONTROL NUMBER ppaaro ~ J'E ACRS 16 SENT AS AT B

J a

~o)

TENNESSEE VALLEY AUTHORITY CHATTANOOGA. TENNESSEE 37401 9)

Allglls't 1 p 1977 Q- >Sg g~

,~OLIN~~~-

.Wl~

~ 1 Mr. Norman C. Moseley, Director U.S. Nuclear Regulatory Commission Office of Inspection and Enforcement Region IX 230 Peachtree Street, NW., Suite 1217 Fl)e ajar Atlanta, Georgia 30303 Rgyilato'rg 1

Dear Mr. Moseley:

TENNESSEE VALLEY AUTHORITY - BROGANS FERRY NUCLEAR PLANT UNIT 2 -

DOCKET NO. 50-260 - FACILITY OPERATING LICENSE DPR-5,~ REPORTABLE OCCURRENCE REPORT BFRO-50-260/7710 The enclosed report provides details concerning drywell oxygen',

sensor 202M-76-43 which became erratic during normal operation.

This report is submitted in accordance with Browns Ferry Techni-cal Specifications Section 6. 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. 30555 An Equal Opportunity Employer 77a3rc eFE

~ ~

D ~

~ ~

CONTROL BLOCK:

y LICENSEE EVENT FIEPoFITyprarergy E!Id ey'. 0)RS)rd (PLEASE PRINT ALL REQUIRED INFORiVIATION) 1 6 LCENSEE LCENSE EVENT f I 'NAIVE LCENSE NUMBER TYPE TYPE QOt] A L B F 2 0 '

0 0 0 0 0 0 4 1 1 1 1 ~03

~

89 14 15 25 26 30 31 32

.I "CATEGORY REpoRT TYPE REpoRT SOURCE oocKET,NUMBERS '-1," s,l II, o!IEvE'NT oATE REPORT DATE

~01 CON'r L ~L 0 9 57 58 59 60 61 68 69 74 75 80 EVENT OESCRIPTION j I CQ 7

0 2

~04

?

09 8 9

'urin o aration.

normal o eration A

Further investigation to be redundant dr dr ell ox en sensor ell sensor w erformed at next cold shutdown 202 >> 6-4 not to exceed 3 80 80 80

'-Qpg BFRO-50-260-7710 7 8 9 II06 L? 89 FAME SYSTEM CAUSE COMPOIIEN T COMIrGNENT COOE COOE COMPONENT COOE SUPPUER MANUFACTURER VOIATION

[00ri ~sE E 1 N s E RU G 0 8 0 N 8 9 10 11 12 17 43 47 48 CAUSE OESCRIPTION

~0 8 This is an interim re ort - su 16 e t followi ~ w r I7 99 later than 8/ll 77 80 ~

I-JQO g shutdown, no 7 89 Illai I tl FACILITY STATUS POWER OTHER STATUS METHOO OF OLSCOVERY 06COVERY OESCR>PTION 80 r1 [111 J ~E ~06 7 N A 0 t It?

~si 8 9 FORM OF 10 12 13 45 46 80 ACTIVITY CONTENT RELEASEO OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE

'KDe L~J L~J N/A Ir 0 0 10 11 44 45 80 PERSONNEL EXPOStJRES f t113 LQLQLJ LKJ f)7 89 11 12 13 PERSONNEL INJURIES NUMBER OESCRIPTION Ld?

~14 89

~00 11 12 N A 80 OFFSITE CONSEQUENCES t':EHI 80 LOSS OR OAMAGE TO FACILITY 1YPE OESCRIPTION

~16 ~Z N A t..7 89 10 80 PUBLICITY N/A L7 BS 80 AOOITIONAL <ACTORS

~13 tf/A j? 89 30

,. +1.).

89 80 NAME:

I, ss M ~

'HOIV.E'PO ESf. E61

RECEIYE0 DQCUIIEHT PROCESSNG UNIT 19/l AUG l9 PM l2 08