ML19312D449

LER 80-008/03L-0:on 800219,during Startup After Refueling, One Steam Flow Meter on Each Steam Line Did Not Come on Scale.Both Transmitters Drifted Low.Caused by Zero Adjustment Shift in Barton Model 384 Transmitters

ML19312D449
Person / Time
Site:	Prairie Island
Issue date:	03/20/1980
From:	Hunstad A NORTHERN STATES POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19312D446	List: ML19312D445 ML19312D449
References
LER-80-008-03L, LER-80-8-3L, NUDOCS 8003240421
Download: ML19312D449 (1)

Text

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7 8 9 LICENSEE CODE 14 16 LICENSE NUMSER 23 26 tlCENSE TYPE Jo Si CAT be CON"T o 1 8

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i 60 81 DOCK ET NUM8ER 68 69 EVENT DATE 74 15 RE POR T DATE 80 EVENT DESCRIPTION AND MOBABLE CONSEQUENCES h Wy l During startup af ter refueling, one steam flow meter on each steam line did not come l w [on scale. Both transmitters had drifted low such that their inputs to main steam l fo TT1 Iisolation logic and reaetor trip logic would have occurred below Tech Spec limits. I o 5 l Appropriate bistables were put in trip. No effect on public health and safety since l o s l redundant devices were operabic. I o 7 l 1 O a l I 7 8 9 80 DE CODE SUSC E COMPONENT CODE SUSCODE SN DE 7

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, SEQUENTIAL OCCURRENCE REPORT REVISION LE R/RO EVENT YE AR REPORT NO. CODE TYPE NO.

h ,RE l 8l 0l (--j l 0l0 l8 l y l0 l3 l y b y 21 22 23 24 26 27 28 M 30 31 J2 KN AC O PL NT MET HOURS 22 58 li FOR 8. MANU A TURER Wg SUPPL 1 R gyg 33 34 36 W@ l0 l0 l0 lu l 36 31 40 gg 41 Wg Wg 42 43 lI l2 l0 l4 [g 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h Q l Zero adjustment shif t in Barton Model 384 differential pressure transmitters. Zero l i i l adjustment potentiometer was replaced in one transmitter; both transmitters were re _l

, l calibrated. Search for a more reliable replacement transmitter is in progress. I i a i l i 4 l l 7 8 9 80 STA 5  % POWER OTHER STATUS Di$ 0 RY DISCOVERY DESCRIPTION i s W@ 'l0 l 2 l 5 l@l N/A l y@l Operator observation l A TIVliv CO TENT AMOUNT OF ACTivlTY LOCATION OF RELE ASE 6

RELEASE @D OF RELEASE @l NA l l NA l 7 8 9 10 13 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION '

i 7 l 0 l 0 l 0 l@y@l NA l PER$o~~El'imuLs NUM8ER DESCRIPTION 7

i s 8 9 l0l0l0l@l 11 12 NA 80 l

LOSS OF OR DAMAGE TO FACILITY TYPE DESCRIPTION 8 [Zj@l 8 9 NA l 7 to 80 PU8tlCITY Ngp g3E gyg,y 2 ~ UN 1$5UEO@l NA DESCRIPTION l lllllllllllll; P 8 9 10 68 69 80 &

NAME OF PREPARER

. A. Hunstad PHONE: ,

8003240 M/