ML20003G189

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LER 81-013/03L-0:on 810319,core Spray Hi Drywell Pressure Switch RV46B Tripped in Excess of 2 Psi Tech Spec.Caused by Sensor Repeatability.Sensor Recalibr.Replacement of Sensors Recommended by PORC
ML20003G189
Person / Time
Site: Oyster Creek
Issue date: 04/20/1981
From: Riggle E
JERSEY CENTRAL POWER & LIGHT CO.
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20003G187 List:
References
LER-81-013-03L, LER-81-13-3L, NUDOCS 8104280447
Download: ML20003G189 (1)


Text

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l go,,; ;as found trippoint was 2.18 psi. Safety significance is considered muumal i Io I s i ; since the RV46B switch would have trippad slightly (.18 psi) above Tech , I 1 C Ie 1, Spec limit. The Core Spray Sysr.em would have performad its intendad I g c ;; ; ; function since only one logic channel redundancy was c.umumised. i so 1 o I8 l l . I!h[ [[$E shay $$E C0eroNENT CCDE stEYot sEcot joi9j l S lF l@ W@ l Z l@ l IlN 3 10 11 42 IJ lS lT lR lU l@ l El@ [_Z_] 18 19 20 @ 9 EVt$10 *- y g CCCURRENCE REPORT SEQUENTIAL Na REPORT NO. CCCE TYPE EVENTYE4R O .; lea gg;ao I8i1i [__j 10 il 13 i y 10 l3 i 28 29 iti 30 [__j 38 [0_j 22 22 23 24 26 27

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                                                                                                                                                                       'Ihe f          ( i g o j lThe cause of the O ~it rence was attributed to sensor repeatabilitv.

I l g , ; , g l sensor would have operated within desien accuraev but niichely ahwa , I

           ,,,,,       (rech Spec 1imits. The sensor was racalibrated within the 1imit M 2 ry::i .

I g,i3j l'Ihe PORC has recueendad reolace m.nt of these sensors. l l16 4 I 1 so "s*T"4E"s s PowtR oTHERsTATus h $isECRN oiscovERv oEsCRiPT:os h NA l [B_j@l Surveillance Test l ! l 15 l [EJ@ l 0 l 8 l 912]@l11 44 45 46 87 7 8 9 to ACTivlTV CONTENT LOCATION CP RELEASE AMCuNT OF ACTIVITY RELEASED CP RELEASE l NA l l NA Ii Is l [ Zj @ LZ j@l _ 44 45 80 3 3 g IC_ tt PERSONNE( EXPC3UR ES o.JugER TYPE Q ESCRIPTION r l NA l i l 7 l l 0 ] 0 l 0 l@l Z !@l PE RSONNE L INJuNiEs

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l NA [i l a l l 0 l 0 l 011l@l12 80 7 s9 LC1108 CR D AM AGE TO P ACILITY TvPE CE5CRIPTION l NA lil9l 80 i . o so EmW , DESCRIPTtOP.

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