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

{ _ Al Ll Bl Rl Fl 3l l0l0l-l0l0l0l0l0l-l0l0l l4l1 l1l1l1l l 0] 3l 7 69 14 15 25 28.

30 31 32 CATEGORY T P SO OOCKET NUMBER EVENT DATE REPORT CATE i:11] CON'T l l

l W W l 0l 5l 0l-l 0l 2l 9l 6l l1 l1 l1 l 7 l7 l 6 l l

l l

l l

l l

1 7 8 57 58 59 60 61 68 69 74 75 80 EVENT DESCR:PTION EI? l Durine startup testing the torus oxygen sensor failed to respond properly to calibra-l

,7 3

~

The ' redundant hydronen 80.l"

!:i 1 l tion cas while perforfaine a surveillance test.

2 e-ent vns 80 89 g.[ l operable. 'This is a repetitive problem.

Inspection of sensor and calibration piston l 80

- 89 l

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

80 7 89 PraME

• 5EE C

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

l Il Nl Sl Tl Fl U l d

lGl0l8l0l d

7 89 10 11 12 17 43 44 47 48 CAUSE CESCR:PTION

!:15ll NA l

"j 7 89 EE11 7 89 e

7l 1

7~

9 80 STA ib POWER OTHER STATUS DSCOVERY DISCOVERY CESCA.PTON 1 1 l Bl l0 l7 l1l l

NA l W l

Surveillance Test l

7 8 9

10 12 13 44 45 46 80 OF NASE l AMOUNT OF ACTMTV LOCATON OF AELEASE 5

y NA l

l NA l

1E l Zl j 7 8 9

10 11 44 45 80 PERSONNEL EXPOSURES P.Jve!4 TYPE DESCR@TCN NA g

(ta}lolol0l dl

7 89 11 12 13 80 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 80 7 89 8306270028 770126 LOSS OR OAMAGE TO FACILITY PDR ADOCK 05000296 Tvn CESCA@ TON

]Jl N.

S PDR g

7 89 10 80 PUBLtCITY gl NA 7 99 80 ADOtT:CNAL FACTORS

]l NA

! G9 80

]l NA 4 7 59 83 M VvT3 RT6TY1 o

a

%q IEFH.E qI

[9 m.9 TENNESSEE VALLEY AUTHORITY

+

5

~

-a g

CH ATTANOOGA. TENNESSEE 374ot We.#

December 16, 1976 g

[.

"s gf'.

j g y\\

Mr. Norman C. Moseley, Director qf j G U.S. Nuclear Regulatory Cot:naission

.t!'

4 Q k[CgO[Og,D

,idi

~NV L

Office of Inspection and Enforcement

, Region II 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

_