ML20084T859

LER BFRO-50-259/7624:on 761104,torus Oxygen Sensor Failed to Respond Properly to Calibr Gas During Surveillance Test. Caused by Plugged Nozzle on Calibr Cylinder.Nozzle & Sensor Replaced

ML20084T859
Person / Time
Site:	Browns Ferry
Issue date:	12/03/1976
From:	Fox H TENNESSEE VALLEY AUTHORITY
To:	Moseley N NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
LER-BFRO-50-259-762, NUDOCS 8306240216
Download: ML20084T859 (2)

Text

. UCENSEE EVENT REPORT SE PZINT ALL CEEUIRED INFOCM ATl;N)

. ' CONTROL BLOCK:l l l l l l

. i e

• TYPE LCENSE NUMBER NAME l4 l1 l1 l1 l130l lO!3!

E 7 89 Al Ll Bl d d 14 d l150 l 0 l-l0 l O! Ol O! 0l-l O! Gl 25 26 31 32 EVENT DATE REPORT CAtt .

T7eU Nfa!$ occxET NUVBER l l f

! O 1 CONT l CATEccAv l l y y l0l5l0l-l0l2l5l9l68 l 1l 1l 0l 4l 7l 6l 74 l

75 l l l l 80 69 7 0 57 50 59 50 61 EVENT DESCRIPTION J

[3}p lDuring startup testing the torus nxygen sensor' failed to respond properly to cali- 80 Y 89 The redundant hydrogen sensor was l I

Q lbrction gas while performing' surveillance test. 60 7 89- BFRO-50-259/7624 l Q lop;rable. This is not a repetitive problem. 60 7 89 I EI 7 89 60 1

80 EI 7 89 pang A M VOLATION CODE COMPONENT CODE DE l Il Nl Sl Tl RI Ul17 [NJ lC l 0l 8l 0l [NJ E l t l E I LE) 7 89 10 11 12 43 44 47 48 CAUSE DESCRIPTION l gg l The nozzle on the calibration cylinder was inspected during a cold shutdown and 60 7 89 The l Q l found to be plugged. Air cyl'inder SC-6, Chicaco Cvlinder Co., Chicago, Ill. 80 7 89 replaced to frorove_resnonse time. l f l nozzle was replaced; the scncer uss alsn oo 7 9 METHOD CF F2iuty DISCOVERY OtSCoVERV DESCA#fCN

% POWER oTHER STATUS Surveillance Test l 1

STATUS l 0l 3l 5l l NA l 44

[45 l 46 EO 7 8 9 10 12 13 LoCATON OF RELEASE f ELE SEO OF E ASE AMOUNT oF ACTMTV l NA E

7 8 d

9 dl 10 11 NA l 44 l

45 80 PERSONNEL EXPOSURES NUMBE R Type DESCR@ TON l M l0 [ 0l 0l yl NA -

80 7 89 11 12 13 PEASONNEL INJUR!ES g NLMBE A DESCH@iCN 1 NA M l0l 0l 0l l 60 7 89 11 12 OFFSITE CONSECUENCES t NA l

7 89 LOSS OR DAMAGE TO FACILITY 8306240216 7612 '

Tyre etsCAstcN , gDRADOCK05000 9 l -

@Wl 7 89 10 ,

NA- PDR 80 PUBLICITY l NA-iQl 7 89 O

ADDITIONAL FACTORS l NA BO

'7 89

- I El 7 89 80

p Q wl v. .. d L pn. , o o y g TENNESSEE VALLEY AUTHORITY g E CHATTANOOG A. TENNESSEE 374o1 -,

J

%e.#

j December 3,1976

,O it0 v Mr. -e gtbsoley, Director  % gc 6 W6 g U.S. ear Ehgulatory pomission p -

Offic f Inspo tion Enforcement C #A

• w Regioit II l 230 htree St , !!W., 8th Floor - '

A ta,. Georgia 30303 ilig) l

... . . . . l

Dear Mr. Moselay:

TBDfESSEE VALLEY AUTHORITY - BROW!!8 FERRY NUCLEAR PIAlff UNIT 1 -

DOCKET ITO. 50-259 - FACILITY TETG LICENSE DPR REPORTABLE OCCURRENCE REPORT BFRO-50-25 i

The enclosed report is to provide details concerning the torus oxygen sensor which failed to respond proper.1,y to calibration l gas while performing a surveillance test during startup testing.

This report is submitted in accordance with Browns Ferry Technical Specifications Section 6. This event occurred on Browns Ferry Nuclear Plant unit 1.

Very truly yours, TE!OIESSEE VALLET AtftHORITY v H. 8. Foz -

Director of Power Production l

Enclosure (3)

CC (Enclosure):

Director (3)

Office of Management Information and Program Control U.S. Ihaclear Regulatory Comunission f l u ngton, D.C. 20555 ,

Director (40)

( Office of Inspection and Enforcement .

l U.S. Iluclear Regulatory Cocanission l

Washington, D.C. 20555 12334 An Equal Opportunity Employer

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