05000267/LER-1981-006-03, /03L-0:on 810107,during Annual Testing & Calibr, Six Helium Circulator Seal Malfunction Pressure Differential Switch Units Discovered to Have Trip Points Set Outside Tech Spec Limits.Cause Unstated.Switches Readjusted

/03L-0:on 810107,during Annual Testing & Calibr, Six Helium Circulator Seal Malfunction Pressure Differential Switch Units Discovered to Have Trip Points Set Outside Tech Spec Limits.Cause Unstated.Switches Readjusted

ML20003B115
Person / Time
Site:	Fort Saint Vrain
Issue date:	02/03/1981
From:	Gahm J PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20003B109	List: 05000267/LER-1981-006, Forwards LER 81-006/03L-0
References
LER-81-006-03L, LER-81-6-3L, NUDOCS 8102100369
Download: ML20003B115 (1)

LER-1981-006, /03L-0:on 810107,during Annual Testing & Calibr, Six Helium Circulator Seal Malfunction Pressure Differential Switch Units Discovered to Have Trip Points Set Outside Tech Spec Limits.Cause Unstated.Switches Readjusted

Event date:
Report date:
2671981006R03 - NRC Website

text

..

.N Rc F O AM 366 U. S. NUCLEAR REGULATORY COMMISSION (7 771 LICENSEE EVENT REPORT O

CCNTRCL BLOCK-l 1

l l

I l

h IPLE ASE PRINT OR TYPE ALL REQUIRED INFORMATION) l 0 l i l I C l O ! F l S f V I 1 l@I O ! 0 l - l 0 I n l 0 ! 0 l 0 l - l 0 l 0 l@l 4 l 1 l 1 l 2 I o l@ll l@

7 8 9 LICENSEE COOE to 1S LICENSE % veer 26

e LiCgssE Tyag JC 37 C A r 34 CON'T loli!

C"J l t )@l 0 f s l 010 ! 0121 A ! 7 l@l o l i l o I T I a l t l@l 0121013 ! 8 t i l@

6 60 61 OOCKET % MSEm sd 69 EVENT OATE 74

't AE* CAT CATE 80 EVE *.T OESCRIPTICN AND PROB ABLE CCNSEQUENCES h 10121 lDuring annual testing and calibration. six of the tvelve helium circulator seal =al-l [ol3l 1 function pressure differential switch units were discovered to have a trip noint out-l l o 14 j l side the limits of LCO 4.4.1, Table 4.4-3.

These are recortable per Fort St. Vrain 1

1o is j l Technical Specifications AC 7.5.2(b)1 and AC 7.5.2(b)2.

.= effect on public health l

l a M j l or safety. Redundant system available and oeerable. Similar reports are RO 77-47, I

j o i 7 ! [ Final and Preliminarv reports RO 78-27, 79-32, 79-56, 80-07. 80-16, 80-20. 80-26, I

io,4i l 80-34, 80-41, 80-51, and 80-72.

I 80 7

8 7 system cab 5E CALSE Cov'

%ALvt CCCE CCCE SL9CCCE CGMPONENT CODE SL8COCE SUSC00E 10isi I C l a l@ Lt.J@ L:_J @ I r in IS IT I= l e l@ Ls_l@ l z i @

v e

9 13 11 12 tJ 18 19 2J SE QUE NTI AL CCCURRENCE REPCRT REVISION gga og EVENTvEam mE*CRT No.

C00E TV'E NO.

@ qe g l a 11 l l-l l o 10 l e I l/l I nl al L'J I-I la_J 21 22 23 24

.6 21 28 29 JJ 31 32 N A T CN ON PLANT MET HOURS S8 I 80R 8

SLP8 E MAN 4FACTLRER lvl@ W @

W@

19 l@

lo ln in lo l W@

l NI@

IN l@

l B l 0 l 8 10 l@

3J 24 3b 26 J

40 43 42 sa 44 47 CAUSE CESCA:9 TION AND CORRECTIVE ACTIONS l i 10 l lITT 3arton Model 289 oressure differential switches failed to actuate at trio noint i

1ilijldue to dirt accumulation in electrical switches. Affected switches re-adiusted to I

i'I/Ilproper trip points. Surveillance Test satisfa,corily completed. Trip settings being g

,,,3, [ checked on a monthly basis. Redesign of system being evaluated.

l I

Lu 4.1 1 30 7

8 9

$T

% POWE R OTHER STATUS RY DISCOVERv QESCRIPT'ON li 15 l l G l@ l0 l o I o l@l l

lB l@lScheduledSurveillanceTest l

A/T,v,Tv CchT wouNT e, Acrivifv @ I LeCATicN o, RELEASE @

l i 161 l l @o :, EtEastL'J@l s/A u esE I

s/A I

7

$ 9

'O 11 44 45 t

30

• ERSONNEL ExPOSLAES NUVSEe Tvet OESCRIPDON -

1711 01 01 O l@l z l@l N/A I

i

,E semel INJEs

EsCR,,TicN@

% v.ER li i > l 1010101@l n/A I

7 8 9 11 12 30 LOS$ OF CR DAMAGE To FACILITY Q TvP(

O($CRIPT!QN y

Ii I il Lz_J@l s/^

l 30 7

4 9 10 NRC USE CNLY 33u,@c'ESCR,,T,oN@

68 69 30 ;

l l!lIIliIIIIIl}

l nri e

12131 7

3 3

?3 (303) 735-2224 i

Nave oF A9EPARER '

WCNE:

sionion g