05000325/LER-1980-093-03, /03L-0:on 801228,rod Worth Minimizer Initiated Insert/Withdrawal Rod Block at Rod Group 56 When Rods Were in Correct Position.Caused by Computer Rod Worth Minimizer Software Problems.Problems Corrected

/03L-0:on 801228,rod Worth Minimizer Initiated Insert/Withdrawal Rod Block at Rod Group 56 When Rods Were in Correct Position.Caused by Computer Rod Worth Minimizer Software Problems.Problems Corrected

ML19341A645
Person / Time
Site:	Brunswick
Issue date:	01/21/1981
From:	Pastva M CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19341A639	List: 05000325/LER-1980-093, Forwards LER 80-093/03L-0 05000325/LER-1980-093-03, /03L-0:on 801228,rod Worth Minimizer Initiated Insert/Withdrawal Rod Block at Rod Group 56 When Rods Were in Correct Position.Caused by Computer Rod Worth Minimizer Software Problems.Problems Corrected
References
LER-80-093-03L-01, LER-80-93-3L-1, NUDOCS 8101270595
Download: ML19341A645 (1)

LER-1980-093, /03L-0:on 801228,rod Worth Minimizer Initiated Insert/Withdrawal Rod Block at Rod Group 56 When Rods Were in Correct Position.Caused by Computer Rod Worth Minimizer Software Problems.Problems Corrected

Event date:
Report date:
3251980093R03 - NRC Website

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8 60 68 DOCKET NUMBER 68 69 EVENT DATE 74 7b REPORT DATE 80 EVENT DESCRIPTION AND PROBAOLE CONSEQUENCES h IWhile nerforming n normn1 shutdown from nouer npornrfnn. Phn Rnd Unvrh Minimiznr (mne 1 0 2 0 3 l initiated an insert / withdrawal rod block at rod aroup 56.

A connuter verification 1

Ishowed all rods._were in the correct positions.

The RWM was then bynnssed nnd n nornnd I 0 4 LO_l bj loperator was utilized to verify compliance with the prescribed rod pattern and the

_.,l 1 O_lG ] lRQt was declared inonerable as recuired by technf en1 nnecificntinnn.

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33 34 35 36 31 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h i O ISeveral computer RWI softwear problems were discovered which are believed to have I

i i leaused this event.

These problems were corrected and the RWf system was l

ITT71 I returned to normal operation. The Unit No. 2 RWI softwear was also channed to l

ITTTI I the saae configuration as that on Unit No. 1 in order to avoid any similar events I

Iwith the Rmt system in the future.

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8 9 il 12 80 LOSS OF OR DAMAGE TO FACILITY Q TYPE

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M. J. Pastva. Jr.

PHONE:

414 657 4991 810127 Y"bPARER NAME