05000306/LER-1980-008-03, /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

/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: 05000306/LER-1980-008, Forwards LER 80-008/03L-0 05000306/LER-1980-008-03, /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
References
LER-80-008-03L, LER-80-8-3L, NUDOCS 8003240421
Download: ML19312D449 (1)

LER-1980-008, /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

Event date:
Report date:
3061980008R03 - NRC Website

text

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8 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.

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l0 l0 l0 lu l gg Wg Wg lI l2 l0 l4 [g 33 34 36 36 31 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h Q l Zero adjustment shif t in Barton Model 384 differential pressure transmitters. Zero l

l adjustment potentiometer was replaced in one transmitter; both transmitters were re

_l i i l calibrated. Search for a more reliable replacement transmitter is in progress.

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i s A TIVliv CO TENT RELEASE @D OF RELEASE @l AMOUNT OF ACTivlTY LOCATION OF RELE ASE NA l

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8 9 10 13 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION '

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8 9 11 12 80 LOSS OF OR DAMAGE TO FACILITY TYPE

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A. Hunstad NAME OF PREPARER PHONE:

8003240 M/