ML19309E114

LER 80-017/03L-0:on 800310,while in Mode 6,turbine Bldg Sump Monitor O-RM-90-212 Alarm Kept Coming In.Monitor Was Declared Inoperable.Caused by Malfunctioning Flow Switch Not Allowing Sufficient Flow Through Monitor

ML19309E114
Person / Time
Site:	Sequoyah
Issue date:	04/08/1980
From:	Record D TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19309E109	List: ML19309E108 ML19309E114
References
LER-80-017-03L-01, LER-80-17-3L-1, NUDOCS 8004180407
Download: ML19309E114 (2)

Text

W O e, s , ~ a . .

• 4 .

f' fl

.es e.. ,.;u .*. 6 s. i . ut c. i c .< v m . ..

Lif.i ; . I' N';t ' E XIi:n i i u . . n. :,i. . .

! i ..; s . .

. . . . . , . . . , m ,. , c , , m, , . , y . . m .. .

. j i i t'.

F, ...r.i.] [.T_ t N ! S.. -I _N '. P' .1 ' . 0 01 -[0 ' O O ! 0 ! O - 0 l 01 '- t 411_ I.1,[ l_I l j:?:

I l.1/ '/!.0. 5 [0 ' 010..l.3.! 2 '7. } 0 ' 3 1.1 [ OL8 i Oj.' ;[ 01, ,

4 l 0 J,8y 81 01- )

i u . .r :,, ..o. n , .. .

[, g [,,With Unit 1 in Mode 6, the Turbine Building Sump Monitor, 0-RM-90-212, f ,,_. .w....._._

was declared inoperable due to work on flow switch, FS-90-212. There

(.,.; [,_ appeared not to be enough flow through the monitor to keep alarm from

[ [j, coming in. ,

This is contrary to LCO 3.3.3.9. SI-414 was initiated to

[. ;j, g meet action statement 29 of Table 3.3-12.

There was no danger to the i

[. , j t health and safety of the public. Previous occurrences - none.

i 11 L . . . . . .

[T~' I M' C_j f

[E I I Et I'N~ S T 1RiU '/

[SJ6 ' LZj '

bi

• l .L8}.0j

.J [ Oj l . 7l

(.,' j ,0 [,,3J -

LLJ t.=i1 10! .

f, . .c .

.i *1', ....i lZ 0.

~

[A,,,.... i , ZUE Z.. [0 040 8Yj-  ! NJ, ,'-

.. L,,L_J C. ) ELO i 5 is.

1.: ., ,.

1. . .,r -u t Flow switch FS-90-212, Gems Sensors, Part No. 25364, was malfunctioning

t. rc,i iL and was replaced. Monitor was declared operable at 17__00 CST ~on .3/10/80.

. . . . . . . .. .. -- . --=

(- iI This was the first occurrence of an event of this nature. No further p r-) Ecorrective actions required.

, I i. '.] L_ . . . . . . . . _ . ._. . . - . . - . - . . . . -

l[I'] LHf !O ! 0 [0.f  !. N/A, .__

A' ' Operator observation

, .G

[ J j;,j 'LZj ,

M L N/A'

N/A I...l. ._1, L, O'i o T_0

. . . . _ . '.El'J' N/A

. T'~1 di070::it! N/A . . . . . . - . - - - -

+ ,

l'..I] LZF l . N/A ,,, , , _ , _

[ T, _-_) .Q '? : t N/A i i._#.>'..'.' '..'.'-.'

. . . . . . . Daniel J. Record ._611-a42 .520a_.. .

u 8004180 M O h

Tcnne cca Vellsy Authority Sequoyah Nucisar Plcnt LER SUPPLEMENTAL INFORMATION SQRO-50-327/ 8017 Technical Specification Involved 3.3.3.9 Reported Under Technical Specification 6.9.1.13.b Date of Occurrence: 3/10/80 Time of Occurrence: 1030 CST Unit 1 Identification and Description of Occurrence:

At 1030 CST, 3/10/80, the Turbine Building Sump Monitor, 0-RM-90-212, was declared inoperable in order to work on flow switch FS-90-212.

This is contrary to LCO 3.3.3.9 requiring this monitor be operable.

Conditions Prior to Occurrence:

Unit 1 in Mode 6 following initial core loading.

i Action specified in the Technical Specification Surveillance Requirements met due to inoperable equipment. Describe.

SI-414, Turbine Building Sump and ERCW Discharge Radioactivity, was initiated to satisfy Action 29 of Table 3.3-12.

Apparent Cause of Occurrence:

Malfunction of flow switch FS-90-212. This switch initiates an alarm if flow through the radiation monitor is not detected.

Analysis of Occurrence:

There was no hazard to the public health or safety.

Corrective Action:

Flow switch was replaced.

Failure Data:

Switch was supplied by General Atomic, manufactured by Delaval Turbine, Inc.,

Gems Sensors, Part No. 25364. There have been no previous failures.