ML19207B106

LER 79-047/03L-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

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: ML19207B104 ML19207B106
References
LER-79-047-03L-01, LER-79-47-3L-1, NUDOCS 7908230380
Download: ML19207B106 (1)

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LICENSEE EVENT REPORT CONTROL BLOCK: l l l l l l l (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 1 6 7

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CON'T L @ 0 l5 l0 l- 10 l3 l2 l568 l@l 0 l 7 l Il 9l 7 9g 0 8l1l5l7l980 g 0 1 SO7RCE 7 8 60 61 DOCK ET NUMB E R 69 EVENT DATE 14 75 REPORT DATE 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. l 0 6 l Technical Specification 3.1.5.7, 6.9.1.9b l 0 I l l o a I I 7 3 9 80 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SUSCODE COVPONENT CODE SUSCOCE SU8COOE 7

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_ SEQUENTI AL OCCURRENCE REPORT REVISION LER PO EVENT YE AR REPORT NO. CODE TYPE NO.

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36 40 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 1 o lA bad IC chip was found on the rod 10-23 probe buf fer card. This card was replaced It til Ifrom stock. While attempting to replace the bulbs in the " Full-in/ Full-out" indicatori i ,

Ifor rod 42-11, the socket was broken. The socket was replaced from stock. The " Full- l 1 i in" logic signal is fed through a light isolator, a probe card, and on to the RSCS l 1 4 Ilogic board. The light isolator was found burned out, which prevented (Con't) l 3 9 80 STA 5 %PuWER OTHER STATUS ISCOV RY DtSCOVERY DESCRIPTION 1 5 [_C.j h l 0 l 0 0lhl NA l [_A_j@l Operator Surveillance l ACTivlTY CO TENT RELEASED OF RELE ASE AMOUNT OF ACTIVITY LOCA1 '.,* ' OF PE L E ASE i 6 7 3 3

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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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