05000325/LER-1981-026-04, /04T-0:on 810214,liquid Effluent Discharge High Range Indicator/Recorder Indicated Flow Rate Less than Actual.Caused by Mechanical Linkage Between Flow Paddle & Transmitter Becoming Loose Causing False Flow Indication

/04T-0:on 810214,liquid Effluent Discharge High Range Indicator/Recorder Indicated Flow Rate Less than Actual.Caused by Mechanical Linkage Between Flow Paddle & Transmitter Becoming Loose Causing False Flow Indication

ML19341C980
Person / Time
Site:	Brunswick
Issue date:	02/24/1981
From:	Pastva M CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19341C977	List: 05000325/LER-1981-026, Forwards LER 81-026/04T-0 05000325/LER-1981-026-04, /04T-0:on 810214,liquid Effluent Discharge High Range Indicator/Recorder Indicated Flow Rate Less than Actual.Caused by Mechanical Linkage Between Flow Paddle & Transmitter Becoming Loose Causing False Flow Indication
References
LER-81-026-04T, LER-81-26-4T, NUDOCS 8103040647
Download: ML19341C980 (2)

LER-1981-026, /04T-0:on 810214,liquid Effluent Discharge High Range Indicator/Recorder Indicated Flow Rate Less than Actual.Caused by Mechanical Linkage Between Flow Paddle & Transmitter Becoming Loose Causing False Flow Indication

Event date:
Report date:
3251981026R04 - NRC Website

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43 41 42 4J 44 47 CAUSE DESCRIPTION AND CCARECTIVE ACTIONS h l3 l o l l The mechanical linkage between the flow paddle and transmitter becane loose causine the IiIiiI false flew indication. The problem was corrected and the instrument returned to nor al g,l7l l operation. An EUR has been written to evaluate the feasibility of reolacin2 the transt-g i mitter with another of a different, more reliable desien in order to eliminate the f

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'o LF.R A'1TACHMENT '- RO ill-31-26 Facility: BSEP Unit.N'o.1 Event Date: 2-14-81 This event and the one reported in LER 2-81-09 occurred because a spring-loaded pin on the i.echunical slip en cennection between the ficw paddle and transmitter of the ficw indicator / recorder became loose due to vibration in the effluent discharge line causing an inaccurate ficw signal to be sent to the ficw recorder. In each case, the slip-en connection was reassembled with a new pin, the flow indicator / recorder and transmitter were checked for calibration and systeo was returned to normal operation. As both of these events occurred due to the same problem, it is believed that another transmitter of different design with its accc=panying mechanical connection hardware will eliminate the source of the problems encountered.

Plant preventative maintenance procedures are being revised to calibrate this indicator / recorder and transmitter on a quarterly basis. It is believed that this will help reduce the nu=ber of system f ailures until a permanent fix is in effect.

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