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: Difference between revisions

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{{Adams
#REDIRECT [[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]]
| number = ML20003E902
| issue date = 04/07/1981
| title = /04T-1:on 810214,radwaste Sys Liquid Effluent Discharge High Range Indicator/Recorder Indicated & Recorded False Flow Rate.Caused by Loose Mechanical Linkage
| author name = Pastva M
| author affiliation = CAROLINA POWER & LIGHT CO.
| addressee name =
| addressee affiliation = NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
| docket = 05000325
| license number =
| contact person =
| document report number = LER-81-026-04T, LER-81-26-4T, NUDOCS 8104170467
| package number = ML20003E900
| document type = LICENSEE EVENT REPORT (SEE ALSO AO RO), TEXT-SAFETY REPORT
| page count = 2
}}
{{LER
| Title = /04T-1:on 810214,radwaste Sys Liquid Effluent Discharge High Range Indicator/Recorder Indicated & Recorded False Flow Rate.Caused by Loose Mechanical Linkage
| Plant =
| Reporting criterion =
| Power level =
| Mode =
| Docket = 05000325
| LER year = 1981
| LER number = 26
| LER revision = 4
| Event date =
| Report date =
| ENS =
| abstract =
}}
 
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4 60 el coCE ET Nuv8 ER 64 69 EVENT oATE 14 75 REPORT o ATE 80 EVENT OESCRIPTION AND PROB A8LE CONSEOUENCES h ITTTl l Following the completion of a planned controlled release of licuid radioactive vaste. I the Radwaste System liquid effluent discharge high range indicator / recorder, utilized l gg for the release, was found to have indicated and recorded a release flow rate that wasl less than actual causing the specified maximum allowed release rate to be exceeded.
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;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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