ML20003E883

LER 81-011/03L-0:on 810309,isolation Condenser Condensate Return Line Pipe Break Sensor IB11B2 Found to Trip at Value Greater than That Specified in Tech Specs.Caused by Instrument Repeatability.Replacement Recommended

ML20003E883
Person / Time
Site:	Oyster Creek
Issue date:	04/08/1981
From:	Fitzgerald M JERSEY CENTRAL POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20003E878	List: ML20003E877 ML20003E883
References
LER-81-011-03L, LER-81-11-3L, NUDOCS 8104170437
Download: ML20003E883 (1)

Text

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• LICENSEE EVENT REPORT

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SQ 7 8 60 61 DOCK ET NUMs gm 68 63 CAfg EVEN f DES,CRIPTION ANO PRCBASLE CONSEQUENCES h t c I:l l During surveillance testing, the Isolation Condenser Condensate retirn l Io iai l line pipe break sensor IBilB2 was found to trip at 28.5"H;O AP, which is _l

[o;4i l greater than the limit of 17.02 given in Table 3.1.1 of the Tech Snam. I l o ; s ; ; During normal plant operation the condensers a e in standbv and the con- I ic ee ; 6 densate return lines are isolated by closed valves. Durinc mndaner I

3 ;-; ; operation the steam line pipe break sensor in the same channel would .I i o !1

[ have actuated within specs to isolate the condenser as required. s:

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l@ LtJ@ n lI!210l4ig u .7 CAUSE DESCPl8TICN AND COA AECTIVE ACTIONS 1iloll The cause is attributed to instrument repeatability. The switch was I g ; adjusted to trip within the limit of 127.0"H >O AP. Due to frectuent  !

,,,,,; cases of instrument repeatability concerning these snap-action switches, f

, , , ., , l the POPC has recxmmended their replacement with a more suitable cauali- I it i4i [ fied nodel. 80 l

7 3 9 ST 5 %PCWER OTHER STATUS Dis AV CISCCvtRY 3Es RiPTION Ii 15* l l El@ l 0 l 7 l 5"l@l" NA j d @l" Surveillance Test l

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7 ovaticifv N AC USE ONLY issuto 1: I o l LYJ81 D E SC A *T N Weekly News polanen l llI!IlIIi1!<l:1 #5 4'104'l70337 Michael J. Fitzgerald escNE: (609) 693-6038 {

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