ML19338F027

LER 80-051/03L-0:on 800928,during testing,5 of 12 Helium Circulator Seal Malfunction Pressure Differential Switch Units Tripped Outside Tech Spec Limits.Caused by Dirt in Electrical Switches.Switches Readjusted to Proper Trip Point

ML19338F027
Person / Time
Site:	Fort Saint Vrain
Issue date:	10/01/1980
From:	Gahm J PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19338F025	List: ML19338F024 ML19338F027
References
LER-80-051-03L, LER-80-51-3L, NUDOCS 8010070407
Download: ML19338F027 (1)

Text

NRC FORM 366 U.S. NUCLEAR RESULATLRY COMMISSION (7 77) *

/ LICENSEE EVENT REPORT U,

CONTROL BLOCK: l 1

l l l l l jh 6

(PLEASE PRtNT OR TYPE ALL REQUIRED INFORMATION) foTIl8 l9 C l 0 7

l F l S lV l 1 l@l 0 l0 l- l L0CENSE LICEN5EE CODE 14 16 l0 l0 l0 l0 l- l0 1025 l@l4 NVVSER 26 l1LICENSE l1 l2TYPE l040l@l67 CAT l 58 l@

CON'T lOliI Z,"c' l L l@l 0 l 5 l 0 l 0 l0 l 2 l 668 l 769 l@l0 l9 l 2 l2 l8 l0 l@l1l0l0l1l6l0l@

EVENT DATE 74 75 REPORT DATE 80 7 8 60 61 DOCKET NUMBE R EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h li12l lDuring September testing, five of the twelve helium circulator seal malfunction pres- l

,g,3,  ; sure differential switch units were discovered to have a trip point outside the limits l

, , , , , j o f LCO 4.4.1, Table 4. 4-3. These are reportable per Technical Specification l g ; AC 7.5.2(b)1 and AC 7.5.2(b)2. No effect on public health or safety. Redundant sys- l lOl6l l tem available and operable. Similar reports are R0 77-47, Final, and Preliminary l

1017 l l reports RO 78-27, 79-32, 79-56, 80-07, 80-16, 80-20, 80-26, 80-34, and 80-41. l I

1018 I I -8' 7 8 9 E CO E SUSCO E COMPONENT CODE SLB C D'E SU CDE 10l91 7 8 lC lB l@ l El@ l Elh lIl Nl S l Tl Rl Ulh lS lh W @

9 10 11 12 13 18 19 2G SEOuENTI AL OCCURRENCE REPORT R E VISIC, N EVENT YE AR REPORT NO. CODE TYPE NO.

LE R RO

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[d 27 l0l3l 28 29

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[0]

32 K N AC ON ON PL NT M HOURS S8 I FOR B. SUPPLIE MANLFA TLRER

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l41 Yl@ lNl@ lNl@ l44B l 0 l 8 l 047l@

33 34 40 42 43 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS @

l i l 0 l lITT Barton Model 289 pressure dif ferential switches failed to actuate at trip point l

[i g l ldue to dirt accumulation in electrical switches. Af fected switches re-adjusted to l

, , , , y lp roper trip points. Trip settings being checked on a monthly basis. Redesign of l

, 3 l system being evaluated. l I

L' 14_J l 80 7 8 9 SA S  % POWE R OTHER STATUS DIS O RY D'SCOVERY DESCRIPTION y l C l@ l 0 l 0 l 0 l@l N/A l W@[_ Operability Test l ACTavtTY CO TENT CELE ASED OF RELE ASE AMOUNT OF ACTIVITY LOCATION OF RELEASE W [Z j @ $@l '

N/A "

l l N/A l

PERSeNNEL ExrOSUEES NUMBER TYPE DESCRIPTION l

FiTH l 0 l 0 l 0 l@LZ_J@l N/A "

,ERSO~N E L imu'R iES 2

~ UMBER OESCRiPTiON@

i a l 7 8 9 l 0 l 0 l 0 l@l12N/A 11 83 LOSS OF OR DAMAGE To FACILITY TYPE DE SCRIPTION Ii I si L;Lj@l N/A 80 l

7 A 9 10 PuBLiCi R ,TiO 88 10070@7 NRC USE ONLY 2 O [g_[@gl N/A l lllllIIlIlIlII

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