05000325/LER-1979-047-03, /03L-0 on 790719:during Normal Reactor Startup, full-in Indication Remained on After Rod 10-23 Was Pulled. No Indication of full-in on Rod 42-11 Given & full-in Signal Not Sent to Control Circuitry by Rod 22-11.Repaired

/03L-0 on 790719:during Normal Reactor Startup, full-in Indication Remained on After Rod 10-23 Was Pulled. No Indication of full-in on Rod 42-11 Given & full-in Signal Not Sent to Control Circuitry by Rod 22-11.Repaired

ML19207B106
Person / Time
Site:	Brunswick
Issue date:	08/15/1979
From:	Tollison A CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19207B105	List: 05000325/LER-1979-047, Forwards LER 79-047/03L-0 05000325/LER-1979-047-03, /03L-0 on 790719:during Normal Reactor Startup, full-in Indication Remained on After Rod 10-23 Was Pulled. No Indication of full-in on Rod 42-11 Given & full-in Signal Not Sent to Control Circuitry by Rod 22-11.Repaired
References
LER-79-047-03L-01, LER-79-47-3L-1, NUDOCS 7908230380
Download: ML19207B106 (1)

LER-1979-047, /03L-0 on 790719:during Normal Reactor Startup, full-in Indication Remained on After Rod 10-23 Was Pulled. No Indication of full-in on Rod 42-11 Given & full-in Signal Not Sent to Control Circuitry by Rod 22-11.Repaired

Event date:
Report date:
3251979047R03 - NRC Website

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8 60 61 DOCK ET NUMB E R 68 69 EVENT DATE 14 75 REPORT DATE 80 EVENT DESCRIPT'ON AND PROBABLE CONSEQUENCES h o

2 lWhile oerforming a normal reactor startup. the following indicating problems were noted:

o a 11) " Full-in" indication remained on after rod 10-23 had been pulled; 2) No indication l 0

4 lof " Full-in" on rod 42-11; 3) a " Full-in" signal was not being provided to the rod j

0 s l control circuitry (RSCS) by rod 22-11.

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JJ 35 36 37 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS lA bad IC chip was found on the rod 10-23 probe buf fer card.

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in" logic signal is fed through a light isolator, a probe card, and on to the RSCS l

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1 a 9 10 68 69 80 5 PHONE 919-457-9521 2,

NAitE OF PREPARER A. C. Tollison, Jr.

LER CONTINUATION -- RO# l-79-047 Facility:

BSEP Unit No.1 Event Date:

7-19-79 tile logic ignal from reaching the RSCS logic board. The light isolator was replaced from stock. All of these events are considered isolated and no further action is required.

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