ML19257A736

LER 79-097/03L-0:on 791128,during Mode 2 Operation, Containment Bldg Sump Level Indicator Found Reading 0.0%. Caused by Faulty Convertor & Power Supply Which Were Replaced.Unit Calibr & Returned to Svc

ML19257A736
Person / Time
Site:	Arkansas Nuclear
Issue date:	12/28/1979
From:	Pendergraft R ARKANSAS POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19257A734	List: ML19257A733 ML19257A736
References
LER-79-097-03L, LER-79-97-3L, NUDOCS 8001070489
Download: ML19257A736 (1)

Text

.

haC f ORM 3E4 U. S. NUCLE AR RE GULATORY COMMis$ SON ff ??)

LICENSEE EVENT REPORT EXHIBIT A CONTROL SLOCK: 1 (PLE ASE PRINT OR TYPE ALL REOUIRED INFORMATIONI l l I l l lh E I A]R l LeC.Nsia

? 3 9 A l NlCoog0 l plgl in0 j0 l -l0 l Laci~st 34 0l 0 - l 0 l0 [g4 l1 ] 1l1 0 l 0lmuutih 2S a sec t ~>i avet JG 1lgl l 67 C AT to g

CON'T

%8 M LL_)@l015pl0 013 l 6 l 8 Gl 64 111 I 21817 l 9 @ 112 l 218 l 7 l 91@

60 64 DoCRifNvMeia 49 iviNT DAT: 74 76 HFPoM T Dati 80 EVENT DESCRIPTION AND PROBA8LE CONSEQUENCES h o IDurina Mode 2 coeration the containment buildino sumn level indicator o I(2LI-5646-2) was discovered to be readino 0.0%. The redundant level o . indicator (2LI-5646-1) remained operable. This occurrence is similar i Ln_.u.J l to LER 50-368/79-079. Reportable oer T.S. 6.9.1.9.t. I ITTirl I f7TTI I I o e 1 l

'NE '[ci' '

st e'cNa e= o~iat cous EE*[a MEos o e

, ,II I D .oIO L,,E.JG L,,AJ@ I I I NI S I TIR I U l@ B. J@ LZ_J @

, ,, ,. ~

t IVINT 'e a" 8 T o D. Tv k 8

@ ,a'i, a.nog' _I,7 a

l 91>>

[-j u 2 l 0 l 917 I ae W

10I3I

z. n LL,J n {, , -J QJ u

amin A 7 o~ *La f M T **Ovn s s e af Fo*

• surate waN raCTU iR l.A.J@l2_J@

3J 44 LZJ@

2h L.ZJ@

36 Jd

.0 l 01 01 d 40 (11J@

el llLJ O l_A_J @ 1010 l 91343l@

ej e) 44 cAUse oescR,pvios ANo coRRecnvc Actions @

i o Investication revealed a faulty convertor and power supply. Power supplyi

, i and convertor were replaced. The unit was calibrated and returned to

, 2 i service within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> meeting requirements of Action Statement 3.3.3.6 4 CDI] I I

, . i

's tWs' s ,owia ov saevatus @ Es'c W A' o,scovisv cisem,no~ @

i s l_flj@ 101010 l@lPwrEscalationI [B_J@l NA l

" .!rm ry " * 'c co'"ri T

'2

Test so muov~r or acimrv @ toc 3r,o~o,nati,si@

i c NA NA mitiasi@o LZ_J or r..LiasiU@l "

l l

... ao

' ,~ so~~'it.. i.,o,ssis

.,i oix. ,1,o~ @

i 7 l010l Ol@[Z_J@l NA

• l

,ioso~~it mu'4:s

so wvveia oisca.,vio=@

A l 0 l Ol0 l@l NA

, fn7 ,nnl Los oF oa o o fo rAC!tlTV  !

• 1 A 9 l.l.J@lto NA l I os miPYlog NRC U$[ ONLY

$ $s@l

• *

• io NA 1 ll,;;;;;;,,;

c. e. ., ,o uAMeOreRe,AReR Rex Penderoraft ,noy, WOMGM 90010 n %r3