ML20008E941

LER 81-016/03L-0:on 810213,discovered That 3 of 12 Helium Circulator Seal Malfunction Pressure Differential Switch Units Had Trip Point Outside Limits.Caused by Dirt Accumulation in Electrical Switches.Switches Readjusted

ML20008E941
Person / Time
Site:	Fort Saint Vrain
Issue date:	03/03/1981
From:	Gahm J PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20008E940	List: ML20008E939 ML20008E941
References
LER-81-016-03L, LER-81-16-3L, NUDOCS 8103100582
Download: ML20008E941 (1)

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[o 12 l l During February testing, three of the twelve helium circulator seal malfunction pres- 1 p ; 3, 9 sure differential switch units were discovered to have a trip point outside the limits!

l o 141 l of LCO 4.4.1, Table 4.4-3. Thise are reportable per Fort St. Vrain Technical Specifi-1

, o ;, j ; cations AC 7. 5.2(b)1 and AC 7.5. 2(b)2. No effect on public health or safety. Redun- [

,o,,;; dant systems available and operable. Similar reports are RO 77-47, Final and Prelimi-j g a ; , ; l nary reports RO 78-27, 79-32, 79-56, 80-07, 80-16, 80-20, 80-26, 80-34, 80-41, 80-51,l

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J4 06 36 3/ 40 41 42 43 CAUSE DESCRIPTION AND CO ARECTIVE ACTIONS h lijol llTT Barton Model 289 pressure differential switches failed to actuate at trio coint I g ldue to dirt accumulation in electrical switches. Aftected switches re-adiusted to I

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