ML19257A942

LER 79-048/03L-0:on 791217,during Surveillance Testing, Iodine Filter 22 Would Not Start on Containment Isolation Sys Signal or W/Handswitch.Caused by Circuit Breaker Moving Contact Pivot Arm Not Rotating Freely as Expected

ML19257A942
Person / Time
Site:	Calvert Cliffs
Issue date:	01/04/1980
From:	Bauer E, Heibel R BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19257A938	List: ML19257A937 ML19257A942
References
LER-79-048-03L-01, LER-79-48-3L-1, NUDOCS 8001090439
Download: ML19257A942 (1)

Text

NRC rCRM 366 U. S. fJUCLE A R H EGULATORY CC'.*.t.liSSION (7-77)

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7 8 60 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h FoTF1 r During the performance of a surveillance test it was discovered that i o 13 i [ #22 Iodine Filter would neither start on a CIS signal, nor start with l o 4 l the handswitch. The Iodine Filter was out of service from 1125 to 1345 l

!o s [ on December 17, 1979. Iodine Filters #21 and #23 remained operable during g lo is i i this period. This is not a repetitive occurrence. (T.S.3.6.3.1)  ;

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41 Nj@ lAl@ lWl1l2l0lg 40 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS i o l It was found that the circuit breaker 's(DS-206) moving contact pivot ann  ;

Ii i l was not rotating as freely as should be expected ; the pivot point was i

, 2 i relubricated and the breaker tested. It is felt that our preventive l lii3i maintenance program and FTE-53, that relates to Westinghouse Instruction 1 iii4i 33-790-1B Section 9.3.2, is sufficient to minimize the above problem. l 7 8 9 80

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