05000301/LER-1980-009-03, /03L-0:on 801101,during Normal Operation, Performance of ICP 2.14 Found P8 Permissive Bistable from Channel N44 to Be Set at 50.5%.Caused by Instrument Drift. Bistable Adjusted & Tested Satisfactorily

/03L-0:on 801101,during Normal Operation, Performance of ICP 2.14 Found P8 Permissive Bistable from Channel N44 to Be Set at 50.5%.Caused by Instrument Drift. Bistable Adjusted & Tested Satisfactorily

ML20002B012
Person / Time
Site:	Point Beach
Issue date:	11/25/1980
From:	Fay C WISCONSIN ELECTRIC POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20002B006	List: 05000301/LER-1980-009, Forwards LER 80-009/03L-0 05000301/LER-1980-009-03, /03L-0:on 801101,during Normal Operation, Performance of ICP 2.14 Found P8 Permissive Bistable from Channel N44 to Be Set at 50.5%.Caused by Instrument Drift. Bistable Adjusted & Tested Satisfactorily
References
LER-80-009-03L, LER-80-9-3L, NUDOCS 8012090314
Download: ML20002B012 (1)

LER-1980-009, /03L-0:on 801101,during Normal Operation, Performance of ICP 2.14 Found P8 Permissive Bistable from Channel N44 to Be Set at 50.5%.Caused by Instrument Drift. Bistable Adjusted & Tested Satisfactorily

Event date:
Report date:
3011980009R03 - NRC Website

text

NTC FORM 3r@

U. S. NUCLEAR RECULATORY COMMISSION (171Q LICENSEE EVENT REPORT CONTROL BLOCK: l l

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8 60 61 DOCKET NUM8 ER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PAOBABLE CONSEQUENCES h l o l 21 l On 11-1-80 during normal paer operation, performance of ICP 2.14 I

I o l a 1 1 (Feriodic Test Nuclear Instrumentation Power Range) found the P8 per-l lo l4 l l missive bistable from channel N44 to be set at 50.5%.

This is a 2-out-l t o I s l I of-4 logic scheme and all other channels were within the 49%

(+0, -1) l l 0 l6 l l specification.

This event is reportable in accordance with Technical l

jol7l d pecification 15.6.9.2.B.l.

l 10181I l

7 8 9 80 SYSTEM CAY'E

CAUSE

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VALVE CODE CODE SU8 CODE COMPON ENT CODE SU8 CODE SUSCODE lO19l l I l Bj@ [E_J@ l 2 l@ ! I l N l S l T l R l U l@ l X l@ W @

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9 10 11 12 13 18 19 20 SEQUEN TI AL OCCUR R ENCF REPORT REVISION LERRO EVENT YE AR REPOR T NO.

CODE TYPE N O.

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JJ J4 JS Je 31 40 el 42 43 44 47 CAUSE DESCRIPTION AND CORRECTh/E ACTIONS h l i t o l l The cause of the ou :-of-soecification bistable is attributed to in7tru-l lilijiment drift.

The previous test of the bistable on 9-12-80 was satisfac-l i,#2; l tory.

The bistable was adjusted and tested satis factory on 11-1-80.

I g l The other operable channel: __ould have provided the safety function of l w

iii4i l this circuit.

The permissive provides for blocking of the reactor l

7 8 9 coolant flow trip when powe-is below its setpoint of 49%.

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ACTIVITY C TENT

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RELEASE AMOUNT OF ACT' vtTY LOCATION OF RELEASE PERSONNEL EXPOS ES oESCRiPTiON @

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i PERSONNEL INJURIES NUMBER

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