ML19320A988

LER 80-026/03L-0:on 800524,during Testing,Helium Circulator Seal Malfunction Pressure Differential Switch Units Tripped Outside Tech Spec Limits.Caused by Dirt Accumulation in Electrical Switches.Trip Points Readjusted

ML19320A988
Person / Time
Site:	Fort Saint Vrain
Issue date:	06/19/1980
From:	Gahm J PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19320A987	List: ML19320A986 ML19320A988
References
LER-80-026-03L, LER-80-26-3L, NUDOCS 8007080425
Download: ML19320A988 (1)

Text

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

X.* J LICENSEE EVENT REPORT ,

a s V CONTROL BLOCK: l l l l l (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

[O IIl8 l9 C l 0LICENSEE 7

l ? l SCODE l V l 114 l@l15 0 l 0 l - l 0 LICE l 0 *4SE l 0NUMBER l 0 l 0 l- l 0 l 025l@l264 l 1LICENSE l 1 l TYPE 2 l 0JOl@l57 CAT l 58 l@

CON'T IM 7 8 S$RC60l Ll@l 0l 510l 010 l 2 l 6 l 768 @l6901512 l 4 l 8 l 074l@l75 016REPORT EVENT OATE l ll 9DATE I 8 l 080l@

61 DOCKET NUMBER EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h 10121 l During testing, it was discovered that eight of twelve helium circulator seal malfunc-l 1 o I 3 I l tion pressure dif ferential switch units tripped outside the limits of LCO 4.4.1, l Io I4 l l Table 4.4-3. Reportable per Technical Specification AC 7.5.2(b)1 and AC 7.5.2(b)2. I 10 I s l l No effect on public health or safety. Redundant system available and operable. l 1016l l Similar reports are RO 77-47, Final, and Preliminary reports RO 78-27. RO 79-32. l l0l7l l RO 79-56, R0 80-07, RO 80-16, and R0 80-20. l I o Is 1 I -

l 7 8 9 80 E CODE SUBC E COMPONENT CODE SUSCODE S E 10191 7 8 l Cl Bl@ W@ l E l@ lI lN l S lT lR lU l@ l Sl@ ]@

9 10 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION LEA RO EVENT YE AR REPORT NO. CODE TYPE NO.

@ yuM aE [_j l012l6l l/l l0 l3 l lL l l-l l0 l

_ l216l0l 22 23 24 ~ 26 27 28 29 30 31 32 K N AC ON PL NT ME HOURS SB l FOR 8. SUPPL 1 MANUF CTURER Lx.J@Lx.J@ Lz.J@ Lz.J@ 101010101 I r l@ INI@ lNl@ lBl0l8l0l@

33 34 35 36 31 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h 11loll ITT Bnrton Model 289 nressure dif fereatini switches failed to actuate at trip point l 11 II : l due to dirt accumulation in electrical switches. Affected switches re-ndj im r od en I fi TT1 I proper trip points. Trip settings being checked on a monthly basis. Redesign of I g l system being evaluated. l I

L1_14J l 7 8 9 80 SA S  % POWER OTH ER STATUS DIS RY DISCOVERY DESCRIPTION l,,1,,,j,,5,,J l E l@ l 0 l 2 l 3 l@l N/ A l l C l@l Operability Test l ,

A TIVITY CO TENT RELEASED OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE 1 6 h lN/A j lN/A l 7 8 9 10 11 44 45 80 i PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION y l 0 l 0 l 0 l@l Z l@lN/A l l PERSONNE L INJURIES {

NUM8ER DESCRIPTION

[1_la_j l 0 l 0 l 0 l@l N/A l l 7 8 9 11 12 80 LOSS OF OR DAMAGE TO FACILITY 1

TYPE DESCRIPTION 1 9 l 8 9 l Z l@l10N/A 80 7

2 o ISSUE

[N_jhl N/A DE CRIPTION 8007080 h2 f ,'

l

"" "S" ""

l l l l j_l l l l l l l l h 7 8 9 10 68 69 80 5 cxunc.nmcm w _ 1_ 6 wore: (303) 785-2253 y