ML19318C467

LER 80-020/03X-1:on 800418,during Testing,Two of 12 Helium Circulator Seal Malfunction Pressure Differential Switch Units Tripped Outside Tech Spec Limits.Caused by Dirt Accumulation in Electrical Switch.Switches Readjusted

ML19318C467
Person / Time
Site:	Fort Saint Vrain
Issue date:	06/23/1980
From:	Gahm J PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19318C458	List: ML19318C457 ML19318C467
References
LER-80-020-03X, LER-80-20-3X, NUDOCS 8007010506
Download: ML19318C467 (1)

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LICENSEE EVENT REPORT CONTROL BLOCK: l i

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(PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

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7 3 3 LICENSEE COOE 24 15 LICENSE NuMSER 26 LICENSE TYPE JO CON'T IOI1l $C RcE l60L l@l 0 l 5 l COCKET 0 l 0 NLV8 l0 lER2161763@l6901411 18 l 810 @l 0 l 6 REPORT 74 l 2 l C3ATEi 8 l 080l@

7 5 61 EVENT OATE 75 EVENT DESCRIPTICN AND PROBABLE CONSEQUENCES h l Q l:l lDuring testing, it was discovered that two of twelve helium circulator seal malfunc- l

[ O 131 [ tion pressure differential switch units tripped outside the limits of LCO 4.4.1, l 1014l l Table 4.4-3. Reactor operation during test interval. Reoortable ner Techical Sneci-l lo!sl i fication AC 7.5.2(b)1 and AC 7.5.2(b)2. No effect on public health or safety. Re- 1 I o le 1 l dundant sys tem available and operable. Similar reports are RO 77-47, Final, and Pre- I loi7l l liminary reports RO 78-2 7. RO 79-32. RO 79-56. RO 80-07. and R0 80-16. I loisi l I 7 4 2 80 E CODE SLSC DE COMPONENT CODE SUSC CE SL E 19191 7 8 l C l B lh Wh lE lh l Il Nl Sl Tl Rl Ulh l S lh l Z lh 9 10 11 12 13 18 19 ;0

_ SEQUENTIAL OCCURAENCE REPORT

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JJ 34 JS Jo 3 40 41 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS l i t a l lITT Barton Model 289 pressure dif ferential switches failed to actuate at trio coint l lil1 1 [ due to dirt accumulation in electrical switches. Affected switches re-adiusted to I i,,7i jpremar trip points. Trip settings being checked on a monthly basis. Redesign of I ii ;3i l system being evaluated. l l i l 41 1 1 7 8 9 "O SYA S  % POWER OTHER STATUS DIS V RY DISCOVERY 0ESCRIPTION 11 Is l W@ l ' Ol 213l@l N/A l l Cl@l operability Test l ACTIVITY CO TENT oELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE I ; 16 l l Z l @D OF AELEASElZlglN/A l l N/A l PERSONNEL EXPOSURES Nuv8eR TYPE cESCRiPriCN h t i l - 1 10 l 0 l 01@l z l@l N/A l PERSONN A'iNouh5 NuveER oESCRirTiCNh lihl101010l@l 7 8 3 11 N/A 12 80 l

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l i l 91 7 d 3 I Z i@l10 N/A l 30 PUB LICITY NRC USE CNLY n , O i it't@f"h"2 ~ 8007010 566 i i i i i iii i i i i i ii AME OF PREPARER - " PHONE: (30 ) 785-2253

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