ML19344E069

LER 80-025/03L-0:on 800721,during Routine Surveillance Testing MS-DPIS-2-12OC Was Found W/Setpoint in Excess of Tech Spec.Caused by Setpoint Drift.Setpoint Readjusted & Operation Verified

ML19344E069
Person / Time
Site:	Vermont Yankee
Issue date:	08/20/1980
From:	Murphy W VERMONT YANKEE NUCLEAR POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19344E059	List: ML19344E058 ML19344E069
References
LER-80-025-03L, LER-80-25-3L, NUDOCS 8008260579
Download: ML19344E069 (1)

Text

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mm LICENSEE EVENT REPORT LER 80-25/3L Q CONTROL SLOCK: l l I l l l lh (PLEASE PRINT OR TM ALL REQUIREO INFORMATION) fo"Til l V l T l V I Y l S I 1 l s010 l- IO IO uCENsE l0m,ueEn lo 10 l- IO loa l@:s4uCENsE l 1l TvPE 1I 1l ao 1 Srl@l ur se l@

> e 9 uCENsEE Coce i4 CON'T I0l1I Ey',"c'lLl@l015l01010l217l1@l0 176912 11 l8 10 @l_Q_Lg 74 7S IA 2 l 0 I 9 I odol@

EPoRT oATE 7 8 60 61 coCKET NUMgEm 68 EV ENT oATE EVENT CESCalPTION AND PRC8ABLE CONSECUENCES h l o 121 l During routine surveillance testh MS-DPIS-2-120c uma fntmd vieh m ame%% e % ow...!

, pl of what is allowed by T.S. Table 3.2.2. MS-DPIS-2-120C is not required in the run l

[ o ,4 ; l mode. Three redundant switches were operable and would have initiated a Groun 1 Pci l Io Isi l if required. Based on the above, there were no adverse consequences to the public l i o le i ; health or safety as a result of this event. A similar crevious occurr3 pee was recortaa _

I i o i 71 (_f w RO 77-11/3L.

I lo!s i I so r so E oE SU C E COMPONENT CooE SLS CE SU E lo191 7 8 1 S i D I@ l E l@ [E_J @ 13l Il Nl S l T l R l U l@ l S l@ l 20Z l @

9 to 11 12 18 19 SEQUE NTI AL OCCURRENCE REPoMT REVi5loN EV ENT v t A m REPomT No. CoCE TYPE No.

tE m > no

@ 4Eg 18 l0 l l_l l 0l 2l Si l-l l0l31 lt l 30 l-l 31 l0l 32

_ 21 22 23 24 26 27 28 29 T K N AC oN oP NT U hours 5ei Pom S. Su LE VANUP RER lEl@lZl@

33 24 l3SZ l@ l36Z l@ l 010 l 0 l 0 l 37 40 l44 Y l@ lYl@ lLl@ lB101810l@

42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS it i o i l This event was due to setpoint drif t on Barton Model 278 differential pressure I I

ii ,,,1 indicating switch. The corrective action was to 1:mnediatelv readiust the setnoint

,, , , , j to less than 8.63 PSID and verify satisfactory operation. I I

tilaiI l

Li_ L4.J l 80 7 8 9

'st N %PowEm oTNERSTATVS Cis V otScovERY CESCniPT1oN li 151 lE l@ l 019 l 9 l@l NA l l l@l Surveillance Test I

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".uou~To,4CTivifv NA l

@l n I PEasn~ net nPosSEs Nuo.E. Tv,E oEscaiPTio~ @ I NA LLLJ l' 0101 Ol@l Zl@l

. E.seNNEt ~v'AEs Nuo.E. etscaiPTioN@ I NA LLLJ8 9l 0101 Ol@l12 7 11 80 toS3 of om oAM AGE To F ACILITY TvPE CESCRIPTioN NA I l 7 i s a s IZi@l 10 s0 issue f?Til L_NJ@DE l CaiPT10N NA I IIIi!II!IIIili r a e iO 8 008260 IE79 (802) 257-7711 2 NAME C8 PAEPARER

'arren P. MurDhv PHON E:

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