Demonstration of an Instrumental Technique in the Measurement of Solution Weight in the Accountability Vessels of a Fuel Reprocessing Plant. Final Report for the Period 15 November 1973 - 30 November 1976
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Load cells were installed on the input accountability vessel of a commercial reactor fuel reprocessing facility to determine if this proven principle of mass measurement is in fact applicable in such a severe radiation environment over a long period of time. Two other locations selected were the plutonium product nitrate solution accountability vessel and the plutonium product nitrate solution storage vessel. The latter two environments, while not severely radio-active, require a high degree of contamination control. All three vessels are of different geometrical configuration and capacity. Each vessel was carefully calibrated for volume measurements by adding controlled pre-measured increments of water. Measurements were made using the conventional dip-tube manometer system and the load cell - digital voltmeter. Standard deviation of the measurements on the input vessel and the plutonium storage vessel were in both cases 0.3%; for the plutonium accountability vessel 1.9%. Measurements taken of the input vessel during the ''cold run'' over a six-month period using solutions of unirradiated uranium showed a standard deviation of 0.4% and a bias of 0.8% in the summer months and 0.7% and 0.6% respectively in the winter months FINAL STOP CODE . (Atomindex citation 08:328516)
Demonstration of an Instrumental Technique in the Measurement of Solution Weight in the Accountability Vessels of a Fuel Reprocessing Plant. Final Report for the Period 15 November 1973 - 30 November 1976