ML20147A749

/03L-0 on 780808:time Delay Relay Tdu 2E-K5B Settings Were Incorrect Due to Minor Setpoint Drift. Adjustments Were Made.(Encl to 7809180302

ML20147A749
Person / Time
Site:	Pilgrim
Issue date:	09/01/1978
From:	BOSTON EDISON CO.
To:
References
LER-78-040-03L, LER-78-40-3L, NUDOCS 7809180307
Download: ML20147A749 (1)

Text

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l.tCENSEE EVENT REPORT CONTROL ULOCK: l l l l l (PLEASE PillNT 011 TYPE ALL RCOUlHED INFOf tMATION)

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EVENT'DiSCHIP7104 AND rilODAOLE CONSEQUENCES h i-lT[ t At 0715 hours0.00828 days <br />0.199 hours <br />0.00118 weeks <br />2.720575e-4 months <br /> On August 8, 1978, while performing surveillani 1 .M.2-2.10.9.1 8 (ADS l

pfj [ Subsystem Logic), time delay relay TDU 2E-K5b . settings were Ound tO be incorrect. This l 3 i4 i [ surveillance was being performed because the llPCI had been isolate'd r0 maintenance at l g [0610 hours. '

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CODE VALVC CODE SUBCODE COMPONENT CODE . SUUCODE SUCCOOC

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SC OVE N11 AL OCCURRENCE HEFORT f4CVISION LVLNT YEAH HE POflT NO. COOC TYPE NO, b "Lg k'$",T,E R/HO l7 l 8l l-l @ l4 [0]2s j ,,/ l l0 l3 l lLj, l-l [lj 21 n 23 24

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ITTl i The cause Or thiy event was minor setpOint drif t. The as-round value was 140 serbnds and]

y l required value is 120 + 5 seconds. Adjustments to the time delav ere initiated e-.

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g gimr.tediately and completed at 0745 hours0.00862 days <br />0.207 hours <br />0.00123 weeks <br />2.834725e-4 months <br />. Surveillance 8.M 2-2.10.9.1 was completed l g l satisfactorily. l 2lB 0 I 00 1 h 15 *sPOWfR 01HCH S1 ATUS L IS Y DISCOVCflY DESCRIPTION

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A8nviTY cO01LNT ntii Ar.rO OF Rc tr EC LOCATION Or nCLCASE E [8 Z 9 j @ l Zl@l 10 11 AMOUNTN.A. OF AC11VITY 44 l

45 N.A. @ l ' l l'f flSONNt L E APOGUHCS '

60 NttMat h TYPC DESClHPTION -

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N.A. l 60 80 PU"L 80'l Y llLSCIUPilON drd ' NitC llSf ONLY y 1%U;' H

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Charles J Mathis 60 Og 617-746-4161 UU ;.

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