ML19345E939

LER 81-001/03L-0:on 810102,containment Spray Sys High Drywell Pressure Indicating Switch IP-15C Tripped Above Tech Spec Limits.Caused by Instrument Repeatability.Switch Reset & Study Examining Causes of Repeatability Undertaken

ML19345E939
Person / Time
Site:	Oyster Creek
Issue date:	01/30/1981
From:	Fitzgerald M JERSEY CENTRAL POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19345E935	List: ML19345E934 ML19345E939
References
LER-81-001-03L, LER-81-1-3L, NUDOCS 8102060450
Download: ML19345E939 (1)

Text

~ ~

NaC ponu ass - U.S. NUCLEAR REGULATERY COMMISS ON rr m *

't LICENSEE EVENT REPORT artEAsEpaiNToR TYPs Att :EQUICgD INFO %MATtcN)

CONmet stcCK: [

I l I I I I l@

6 I c i 8i I.2 l NiUCEr.3EE 7

v1 OlCCOE Cl Pl 1l@l 0 l 0 l -l 0UCENSE 14 15 l 0 lNi,MBER 0 l 0 l 0 l- [0 l0 25 l@l 26 4 UCENSE l 111lTyrtll 1l@l JC l

S3 s T 54 l@

Ccn~T IOIiI "'.)n"CE

I L@l 0l 5l 0l 0 l 0 l 2 l 1l 9 69gl 0 l1-[0 l2 l8 l1 )@l0 l REPCAT 74 ?S 1l3 lQ ATE 01811l@ $J 7 & S0 41 QOCK E* Ngwg Em 68 EVENT CATE EV EN r DESCRIPTION AND PRCSA8tf CCNSECUENCES h t a ;:( l During survm11ance testing the Contal: rent Spray Systegn Hich Drywell l 1o i3 e i Pressure Ind'icating Switch IP-15C was found to trip at a value greater t go 44; l than the 2.0 psig Technical Specifications li: nits. The "As Found" trip l i

o ,3 ; ; point was 2.10 psig, so its actuation would have been delayed by a frac- ;j i c ie t. i tion of a second. However, the recL*t switch IP-15A would have l

c ;; ; ; actuated at the desired setinint, so the safety significance of the l i c 6 a , I event is considered mini

ral. l

- as r4 SYSTEM CAUSE CAUSE COMP. vAs.v g 0002 .C00E SUSCOO2 COMPONE*;T COOE $;.E;O E 205:005 Io i ? j 7 3 3 lSl Bl@ l El@ l E l@ l Il Nl SJ TI Rl U }@ lS l@ l zl@

13 11 12 . 12 18 19 23 SECUENTIAL CCCUA AENCE REPCat AEVI53CN EVENT VEA R R EPOAT NC. COCE TY PE No.

O .lLEs .p,g ao Ialil 1-1 1010111 1/l 1013I I LI l-J l 01

._ : , u u 2 2.  :, :s  :. 2a 2. u N AkTICN P 7 MET 5 HOURS S e iTT POR w 3. UE ' MA P pg4 iu El@l24 xi@ l2sz i@ LzJ@

se 2 l 01010101

.c L.i @

y.J Lv_J@

42 Itl@

42 Ir121014l@

= 47 CAusE cEsCRIPT CN AND CCRRECTIVE ACTicNS h I i i o l l The cause was attributed to instrument receatability. The switch was 1 Iiiil ireset to trip within the Technical Soecifications limit of 2.0 osia, and I g l a study is presently being done examing possible setpoint chances to l g y [ account for this repeatability. 'Ihe POPC has also reccrmended replace- l i , ,, i l ment of these switches with a nore qualified nodel. l 7 8 9 83 rus  % Pow 1M QTHER STATUS s ERY DISCOVERY CESCmiPTION Ii i s I l.E j@ l 0l 9 l O l@l NA l lB I@l=; " Surveillance Test l T s , g ,,, cgg,,,, u n = = so l

.EuA E. i. CAT,NoP.EmA.E@

l i i s I [. zj (%P.EuA i 10 Ezi@lNA -ou~TorACm 44 T. @ l 5

lNA go l

7 a 9 ft

• ERSONNEL EXPOSURES Nguesa TYPE OESCMtPTICN li l 71 101010 @l z l@l NA l t Pf PsCNNEl. INJVm ES l Nyuggm OESCRtPTION I s t a l 10 l o l 01@l NA l 7 E 9 11 12 30 L0is CP Cm CAMACE 70 PACluTY Tv'E C EsCntPitCN i l i 191 l z l@l10 NA l 7 e 9 80 l ^

i Pusucify NRC USE ONLY

.ssu gem :EsCaiPTi ~ QS)

I : l o l l Y [Uuil Weekly News Release l IIllIIIIIIIIlt1 1 8 9 10 68 69 '

go. ;

Michael J.'Fitzgerald PHON E:

609-693-6038 o P

j NAME OF PPEPAREft _,

.h ' . . _ . . . _. . _ , .

.. _ _-- ,-.-. - . _ , .