05000267/LER-1980-016-03, /03L-0:on 800322,during Testing,Four of Twelve Helium Circulator Seal Malfunction Pressure Differential Switch Units Tripped Outside Specs.Caused by Dirt Accumulation in Electrical Switches.Readjusted Switches

/03L-0:on 800322,during Testing,Four of Twelve Helium Circulator Seal Malfunction Pressure Differential Switch Units Tripped Outside Specs.Caused by Dirt Accumulation in Electrical Switches.Readjusted Switches

ML19305D709
Person / Time
Site:	Fort Saint Vrain
Issue date:	04/09/1980
From:	PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19305D708	List: 05000267/LER-1980-016, Forwards LER 80-016/03L-0
References
LER-80-016-03L, LER-80-16-3L, NUDOCS 8004150438
Download: ML19305D709 (1)

LER-1980-016, /03L-0:on 800322,during Testing,Four of Twelve Helium Circulator Seal Malfunction Pressure Differential Switch Units Tripped Outside Specs.Caused by Dirt Accumulation in Electrical Switches.Readjusted Switches

Event date:
Report date:
2671980016R03 - NRC Website

text

\\/N NRC FCCM 366 U.S. NUCLEAR RECULATCOY COMMISSION

-(7 77)

LICEIVSEE EVENT REPORT O

CONTROL BLOCK: l l

l l

l l lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 1 6

ITTil I C l 0 I r I s l vi l l@l 0 l 0 l - l 0 l 01010 l 0 l-l 010 l@l 4 l 1 l 11210 l@l l

l@

7 8 9 LICENSEE CCOE 14 IS LICENSE NUM8ER 25 26 LICENSE TYPE Jo S7 CAT S8 CON'T E

S UR] l L }@l 0l 5 l 0 l 0 l 0 l 2 l 6 l 7 @l0 l3 l2 l2 l 8 l0Ml014 l0 l 9 l 8 l0 l@

7 8

60 61 COCKET NUM8ER 68 69 EVENT CATE 74 75 REPORT CATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h 10121 l During testing. it was discovered that four of twelve helfum Mrculator saal mal fime-1 I O l a I i tion pressure differential switch units tripped outside the limits of LCO 4.4.1, l

IO l4 l l Table 4.4-3.

Reactor operation during test interval.

Reportable per Technical Speci-!

l0l5l t fication AC 7.5.2(b)1 and AC 7.5.2(b)2.

No effect on public health or safety.

Re-l 10lsl l dundant system available and operable. Similar reports are RO 77-47. Final. and" Pre-1 ITTTl l liminary reports RO 78-27, RO 79-32, RO 79-56, and R0 80-07.

I 10181 l I

80 7

8 9 COI:'E C0$E SNCO$E COMPONENT CODE Sus O'E Q

lM l Cl Blh W@ l E l@ l Il Nl Sl Tl Rl Ul@ W@ l zl@

7 8

9 to 11 12 13 18 19 20 SEQUENTIAL CCCURRENCE REPORT REVISION LE A RO EVENT YEAR REPORT No.

CODE TYPE N O.

@, Reg l218 l0 l

[-- J l 0~ ll.16 l d

10 l 3 l lLl l-l l0 l u

22 23 24 26 27 28 29 30 31 32 7K N AC 0 0 P NT MET HOURS S8 i FOR 8.

SU L MANUF CTURER lxl@lxl@

( z_J@

Lz_.J@

101010101 IV l@

IN l@

lN l@

l B l 0 l 8 l 0 l@

33 34 35 36 37 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h I i 10 I I ITT Barton Model 289 pressure differential switches failed to actuate at trip point I

g l due to dirt accumulation in electrical switches.

Affected switches re-adiusted to l

lii7; I proper trip points. Trip settings being checked on a mcinthly basis. Redesign of I

l3 l3l l system being evaluated.

l 11 141 l l

7 8 9 80 ST

% POWER OTHER STATUS Dis Y

DISCOVERY DESCRIPTION Ii l5 l l Glh l 0 l 0 l 0 l@l N/A l

l C l@l Operability Test i

ACTIVITY CO TENT RELEASED OP RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE Ii Is I W @ l z l@l N/A l

lN/A l

i 7

8 9 10 ft 44 46 80 PERSONNEL EXPOSURES NUMBER TYPE

DESCRIPTION

i l1 l 7 l l 0l 0 l 0l@l zl@l N/A l

,ERSONNELiN2ub5 NuM8ER

DESCRIPTION

lt l9 I I 0l 0l 0l@l N/A l

7 8 9 11 12 80 LOSS OP CR DAMAGE TO FACILITY Q TYPE

DESCRIPTION

%/

li l 9I l zl@l N/A l l 7

8 9 10 80 l

h[

12 i O I I N U@DE CRIPTION ISSUE l N/A l

lllllllllllll[

^.f g/

68 69 80 7

8 9 10 6.

(3 3) 785-2253 l

800415