ML19225D010

LER 79-047/03L-0 on 790617:monitor Tripped & Failed to Restart During Normal Surveillance.Caused by Loose Bracket Inside Photohelic Pressure Gauge.Bracket Adjusted,Tightened & Returned to Normal Operation

ML19225D010
Person / Time
Site:	Brunswick
Issue date:	07/16/1979
From:	Tollison A CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19225D008	List: ML19225D007 ML19225D010
References
LER-79-047-03L, LER-79-47-3L, NUDOCS 7908030498
Download: ML19225D010 (2)

Text

NRC FORM 366 U. S. NUCLEAR REGULATORY COMMISSION (7 77) .

. . i.lCliNSEE EVENT REPORT

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8 EJ 61 00CK ET NUMBER EVENT DESCRIPTION AND PPOB ABLE CONsECUENCES h 10 i: lDuring normal surveillance of the control panels, the operator noticed that the CAC- 1 ia 3 l ATH-1259 cunitor had tripped and would not restart. This instrument monitors drywell lo 4 l oxygen and hydrogen. l Io 3 l(Technical Specifications 3 . 6 . 6. 4,6 . 9 .1. 9 b) l

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,i o pninspectionfoundthat the low flow lamp would not de-energize even if proper flow  ;

, , lwas present. An energized low flow lamp will trip the unit af ter approximate , 30 l

, , [ seconds. A bracket inside the photchelic pressure gauge was found loose. This l 7-; l bracket holds a photo transistor which controls a relay to energize or de-energize the ;

i 1.s llow flow la=o. This brack_et was sd jus ted for proper opera'; ion. tightened. (Con't1 1 8 3 80 F ACILiTv g E 7H00 OF ,

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919-457-9521  ;

LER COLTINUATION -- RO# 2-79-047 Facility: BSEP Unit No. 2 Event Date: 6-17-79 and the -1259 conitor was returned to normal operation. This is considered an isolated event and no further action is required.

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