ML19345B527

LER 80-033/03L-0:on 801028,steam Flow Transmitter 1FT-464 Observed Reading Low.Caused by Zero Adjustment Shift in Barton Model 384 Differential Pressure Transmitter.Device Recalibr

ML19345B527
Person / Time
Site:	Prairie Island
Issue date:	11/26/1980
From:	Hunstad A NORTHERN STATES POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19345B524	List: ML19345B523 ML19345B527
References
LER-80-033-03L, LER-80-33-3L, NUDOCS 8012010493
Download: ML19345B527 (1)

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UCENSEE EVENT REPORT CONTROL BLOCK: l l l l l l (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

Jay lM !N l P lI lN l 1 l@l 0 l 0 l- l 0 l 0 l 0 l 0 l 0l -l0 l 025l@l4 26 l1LICENSE l1 l1TYPE l 1JOl@l57 CAT l 68 l@

8 9 LICENSEE CODE 14 15 LICENSE NUMBER CON'T l0l1I s$n"C

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Ql 0 l 5 l 0 l 0 l 0 l 2 l g l 9 @l 1 Inl9 I R l R l n l@l1 74 75 l 1 REPORT l 2 l 6DATE l 8 l 080l@

7 8 60 61 DOCKET NUMBER 68 69 EVENT DATE EVENT DESCRIPTION AND PROB ABLE CONSEQUENCES h l0l2l l During str. cup, steam flow transmitter lfT-464 was observed to be reading low. I At recalibration it was determined that the MSIV closure signal and the reactor trip l 1013 l l ITT71 l Signal from this channel could have occurred as much as21% above Tech Spec limits. l loisl l Repetitive; recent sita11ar event was RO 80-27. Tech Spec Tables 3.5-land -2 apply. l I O is l l NO effect on public health or safety since redundant equipment was operable. l l

l o l 71 l I

10 t 81 1 OE CO E S SC E COMPONENT CODE SUBCODE SU E g

7 8 l C l C l@ W@ lE lh l Il Nl Sl Tl Rl Ulh Wh W h 9 10 11 12 13 18 le 20 SEQUENTIAL OCCUR R E NCE REPORT REVISION

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EVENT YEAR REPORT NO. CODE TYPE NO.

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41 42 l43Al@ l 1l2 l0 l447l@

44 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS li l0 l l Zero adjustment shift in Barton Model 384 differential pressure transmitter. l li li j l Appropriate bistables were placed in trip. The device was recalibrated and I returned to service. These transmitters are scheduled to be replaced during i gl ii I3l l the next refueling outage. l ll ! 4 1l 80 l

7 8 9 AU  % POWER OTHER STATUS DtS O RY DISCOVERY DESCRIPTION li 15 l l C l@ l Ol 3l Ol@l NA l l Alhl Operator Observation l ACTIVITY CO TENT RELEASED OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE l1 l6 l @ l' Zl@l NA l l NA l

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• PERSONNEL ExPOSOES NUveER TYPE DESCRIPTION 11 I 71 l 0 l 0 l 0 l@l Z l@] NA l PERSONNE L INJU LES NuveE R DESCRIPTION NA l l i l a l l 0 l 0 l 011l@l12 80 8 9 LOSS 08 OR OAMAGE TO FACILITY TYPE DESCRIPTION NA l

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ISSUED Pusu$TY 8012 010W3 uRC usE ONLv fi'TTl I N l@10l DESCRIPTION NA l lllllllllllll 7 8 9 68 69 S0 E s ad 612-388-4767 NAME OF PREPARER

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