05000325/LER-1981-026-04, /04T-1:on 810214,radwaste Sys Liquid Effluent Discharge High Range Indicator/Recorder Indicated & Recorded False Flow Rate.Caused by Loose Mechanical Linkage

/04T-1:on 810214,radwaste Sys Liquid Effluent Discharge High Range Indicator/Recorder Indicated & Recorded False Flow Rate.Caused by Loose Mechanical Linkage

ML20003E902
Person / Time
Site:	Brunswick
Issue date:	04/07/1981
From:	Pastva M CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20003E900	List:
References
LER-81-026-04T, LER-81-26-4T, NUDOCS 8104170467
Download: ML20003E902 (2)

LER-1981-026, /04T-1:on 810214,radwaste Sys Liquid Effluent Discharge High Range Indicator/Recorder Indicated & Recorded False Flow Rate.Caused by Loose Mechanical Linkage

Event date:
Report date:
3251981026R04 - NRC Website

text

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Iiloll_The mechanical linkage between the flow paddle and transmitter beense icose m i g

the false flow indication. The problem was corrected and the instrument returned to I

normal operation. An EWR has been written to evaluate the feasibility of replacing i

g the transmitter with another of a different, more reliable design in order to elimi-l nate the source of the problems that have been encountered with the system to date.

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Pastva, Jr.

PHONE:

NAME OF PREPARER 810 4170 Y(a7

LER ATTACHMENT - RO #1-81-26 Facility: BSEP Unit No. 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 mechanical slip-on connection between the flow paddle and transmitter of the flow indicator / recorder became loose due to vibration in the effluent discharge line causing an inaccurate flow signal to be sent to the flow recorder.

In each case, the slip-on connection was reas-(

sembled with a new pin, the flow indicator / recorder and transmitter were checked for calibration and system was returned to normal operation. As both of these events occurred due to the same problem, it is believed that another transmitter of diffarent design with its accompanying 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 number of system failures until a permanent fix is in effect.

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