ML20084U044

LER BFRO-50-296/7618:on 761117,torus Oxygen Sensor Failed to Respond Properly to Calibr Gas During Surveillance Testing. Caused Not Stated

ML20084U044
Person / Time
Site:	Browns Ferry
Issue date:	12/16/1976
From:	Fox H TENNESSEE VALLEY AUTHORITY
To:	Moseley N NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20084U041	List: ML20084U038 ML20084U044
References
LER-BFRO-50-296-761, NUDOCS 8306270028
Download: ML20084U044 (2)

Text

- _ _ _ _ _ _ _ .

. U SEE EVENT. REPORT O

, CONTROL BLOCK:l l l l l l [ PLEA!E PRINT ALL REQUIRED OgM ATION) .

1 8 FAME LCENSE NOV8EA Y TYPE

{7 _69Al Ll Bl Rl Fl 3l 14 l0l0l-l0l0l0l0l0l-l0l0l25 l4l1 15 28 .

l1l1l1l 30 l 0] 3l 31 32 CATEGORY T P SO OOCKET NUMBER EVENT DATE REPORT CATE i:11] CON'T l 7 8 57 l

58 l W 59 W60 l 0l 5l 0l-l 0l 2l 9l 6l 61 68 l1 l1 l1 l 7 l7 l 6 l 69 74 l

75 l l l l l 80 l

1 EVENT DESCR:PTION EI? l Durine startup testing the torus oxygen sensor failed to respond properly to calibra- l

,7 3 80

!:i 21 l

~

tion cas while perforfaine a surveillance test. The ' redundant hydronen e-ent vns .l" 89 80 g.[ l operable. 'This is a repetitive problem. Inspection of sensor and calibration piston l

- 89 80

, l requires shutdown within 30 days to determine cause. BFRO-50-296/7618 a9 g

EIsl I 7 89 PraME 80

• C5EE C00E COMPONENT CODE M VF FD VOLATCN i:;7l l 7 l p j (y,_)

7 89 10 11 12 l Il Nl Sl Tl Fl U l 17 d43 lGl0l8l0l 44 47 d48 "

CAUSE CESCR:PTION NA

!:15ll l 7 89 EE11

- "j 7 89 e 7l 1 7~ 9 80 STA ib POWER OTHER STATUS DSCOVERY DISCOVERY CESCA.PTON 7 8 11 l Bl 9

l0 l7 l1l 10 12 13 l NA 44 l W45 l

46 Surveillance Test 80 l

5 AMOUNT OF ACTMTV LOCATON OF AELEASE 1E l Zl OF y NASE l NA l l NA l j 7 8 9 10 11 44 45 80 PERSONNEL EXPOSURES P.Jve!4 TYPE DESCR@TCN (ta}lolol0l dl NA 80 g

7 89 11 12 13 PERECNNEL INJURIES ,

P.W 5 E 4 OESCRIPTON g

l i.pl l 0l0 l 0 l l NA 1 7 89 11 12 80 OFFSfTE CONSECUENCES

[ig) l NA -l 7 89 -

80 LOSS OR OAMAGE TO FACILITY 8306270028 770126 Tvn CESCA@ TON PDR ADOCK 05000296 S PDR

]Jl 7 89 10

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80 g

PUBLtCITY gl NA .

7 99 80 ADOtT:CNAL FACTORS

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%q IEFH.E qI 9 TENNESSEE VALLEY AUTHORITY

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[9 m. CH ATTANOOGA. TENNESSEE 374ot ,

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• December 16, 1976 g

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"s gf'. j Mr. Norman C. Moseley, Director g y\

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U.S. Nuclear Regulatory Cot:naission .t!' 4 '

j GL Office of Inspection and Enforcement ,idi ~NV

, Region II Q k[CgO[Og ,D 230 Peachtree Street, NW., 8th Floor '; /%

Atlanta, coorgia 30303 b - M/

Dear Mr. Moseley:

TENNESSEE VALLEY AUTHORITY - BROUNS FERRY NUCLEAR PLANT UNIT 3 -

DOCKLT No. 50-296 - FACILITY OPERATING LICENSE DPR REPORTABLE OCCURRENCE REPORT BFRO-50-296/7618 The enclosed report is to provida details concerning the torus oxygen sensor that failed to respond properly to calibration gas while performing a surveillance test during startup testing. This report is sub:nitted in accordance with Browns Ferry Technical Specifications Section 6.

This event occurred on Browns Ferry Nuclear Plant unit 3.

- Very truly yours, TENNESSEE VALLEY AUTHORITY H. S . Foz Director of Power Production Enclosure (3)

, CC (Enclosure):

Director (3) /

Office of Management Information and Program Control U.S. Nuclear Regulatory Commission Washington, D.Cf 20555

_ Director _ _(40) }

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

12864 t

An Equal Opportunity Employer t

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