ML19321A522

LER 80-034/03L-0:on 800619,two Helium Circulator Seal Malfunction Pressure Differential Switches Tripped Outside Limits.Caused by Dirt Accumulation in Electrical Switches. Switches Readjusted.Settings to Be Checked Monthly

ML19321A522
Person / Time
Site:	Fort Saint Vrain
Issue date:	07/15/1980
From:	Gahm J PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19321A517	List: ML19321A516 ML19321A522
References
LER-80-034-03L, LER-80-34-3L, NUDOCS 8007230554
Download: ML19321A522 (1)

Text

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NRC 7014M 366 U.S. NUCLEAR REGULATORY COMMISSION (7 77)

LICENSEE EVENT REPORT r

CONTROL BLOCK: l 1

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(PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

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7 8 60 61 68 69 EVENT OATE 74 75 REPORT DATE 80 COCK ET NUMB ER EVENT DESCRIPTION AND PROB ABLE CONSEQUENCES h l o 121 l During testing, it was discovered that two of twelve helium circulator seal malfunc- l

[ o t a l l tion pressure differential switch units tripped outside the limits of LCO 4.4.1, l 10 ( A l ITable 4.4-3. Reportable per Technical Specification AC 7.5.2(b)1 and AC 7.5.2(b)2. I I o I s l INo effect on public health or safety. Redundant system available and coerable. I I o is 1 ISimilar reports are RO 77-47. Final. and Preliminary recorts RO 78-27. RO 79-32. l l o l 7 l l RO 79-56, R0 80-07. R0 80-16. RO 80-20. and RO 80-26. I 1 I o la I i 90 I

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_ SEQUENTIAL OCCURRENCE REPCRT REVISION I LE EVENT YEAR REPORT NO. CODE TYPE No.

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33 34 35 36 37 40 41 42 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h lilollITT Barton Model 289 oressure differential switches failed to actuate at trio coint i Ii li l ldue to dirt accumulation in electrical switches. Affected switches re-adiusted to I i, ,7i l proper trip points. Trip settings being checked on a monthly basis. Redesign of l 1il3; l system being evaluated. l li ia l l I 7 8 9 80 ST 4 POvvER oTHER STATUS Of RY OISCCVERY CESCRIPTION Ii 15 l l C l@ l Ol ll 2l@l N/A I l C lhlOcerability Test l ACT1VtTV CC TENT l l

RELEASEO CP RELEASE AMOUNT OF ACTIVITY LOCAftCN CP RELEASE l1 l6 l l Z l lZl lN/A l l N/A l PERSONNEL EXPCS ES NUM8ER TYPE DESCRIPTION

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LCSS OF OR DAMAGE TO PACluTY TYPE DESCRIPTION l li 191 7 8 9 l Z l@l10N/A go l

l ISSUE DE CRIPTION e 12 i oi IN f@l N/A i i i siiiiiiiiili

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