ML19309F858

LER 80-018/03L-0:on 800327,w/plant Operating at Approx 51% Thermal Power,One Loop 2 Hot Reheat Header Activity Monitor Found Inoperable.Caused by Failure of Motorola Chip (MPS-66A)in Operational Amplifier to Detector Preamp

ML19309F858
Person / Time
Site:	Fort Saint Vrain
Issue date:	04/25/1980
From:	Gehm S PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19309F851	List: ML19309F850 ML19309F858
References
LER-80-018-03L, LER-80-18-3L, NUDOCS 8005010455
Download: ML19309F858 (1)

Text

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

LICENSEE EVENT REPORT

~

CONTROL BLOCK: l l l l l l l (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 1 6 l 0 l 8t l9 l C lLICENSEE 7

0 l F lCoog S l V 14l 1 l@l 15 0 l 0 l- l LICENSE 0 l0 lNUM8ER 0 l 0 l 0 l- l0 10 25 l@l426 l1 l1 l2 l 0 l@l57 CAT LICENSE TYPE JO l

58 l@ )

Ccer l loitl 7 8 SObRC 60 l L ]@l 61 0 l DOCKET 5 l 0 NUMSER l 0 l 0 l 216 68 l 759 l@lEVENT 0 l 3DATEl 2 l 7 l74 8 l750 l@l0 REPORT 14DATE 12 l 580l 8 l 0 l@

EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h io ;al l At 2200 hours0.0255 days <br />0.611 hours <br />0.00364 weeks <br />8.371e-4 months <br /> on March 27, 1980, with the plant operating at approximately 51% thermall goi3; l power and 158 MWe, Operations perscnnel observed one of three Loop 2 hot reheat header l Io i4l l activity monitors was inoperable. This resulted in a degraded mode of LCO 4.4.1. l loisl l Table 4.4-2 and is reportable per AC 7.5.2(b)2. Redundant system available and oper- l 1

l o is I I able. No affect on public health or safety. Similar occurrence reported in RO 78-07. l 10171 l l I

10181 I

~

CE CCCE S SC DE COMPONENT CODE SU8C00E S E l0l9l lIl B l@ y@ l Gl@ l Il Nl Sl Tl Rl Ul@ l S l@ l Zl@ 19 20 7 8 9 10 11 12 13 18

, StQUENTIAL OCCURRENCE REPORT REVISION LER Ro E REPORT NO. CODE TYPE N O.

@ ,agg l8VENT l0 l YEl-l AR l 01 11 8l 1/l 1013l ltl l-l LO_]

_ 21 22 23 24 26 27 N 29 30 31 32 K N C C 0 P NT ME HOURS 22 S8 i POR B. SUP Lt MANUF C RER l33A lgl34Zl@ l35 Zl@ l Zj@ l 0l 01 0l 0l lY l@ l42N l@ l43 Xl@ lM l4 l5 l547l@

36 31 40 el 44 CAUSE DESCRIPTION AND CCRRECTIVE ACTIONS h I i t o i 10ne radiation monitor became inoperable due to failure of a Motorola chip (MPS-66A) inI g l the operational amplifier to the detector preamp. The failed component was replaced I i i i 21 I and the switch returned to service. No further corrective action is anticipated or l lil3] l required. l 11 141 l l 7 8 9 80 SA  % POWER oTHER STATUS DIS O RY DISCOVERY DESCR# TION l

I1 I5 l l E l@ l 0l 5l 1l@l N/A l l Al@l Onerator Observation ACTIVITY CC TENT 9ELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE I1 l 6 l W @D OF RELEASE [Z.j@lN/A l l N/A l PERSONNEL EXPOS ES NUV8ER TYPE CESCRIPTION l

11 I 71 l 0 l 0 l 0 l@l Z [@l N/A PERSONNEL INf 'ES NUMBER DE$CRIPTION l

11 la l l 0 l 0 l 011l@l 12N/A 80 7 8 9 LOSS OF OR OAMAGE To FACILITV Q TYPE DESCRIPTION v

~

It l l 9 l l Z !@l U/A SO050109 T I NRC USE ONLY ,

12lol ISSUE l N/A @DE7CRIPTION@ l lllllllllllll}

...e, .,,, [ .

. ... ( 03) 785-2253

- - - - - - - - - - - - - . _ _ - - - _