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Decay Tables for the Natural Radioactive Series III. Thorium (4n) Series

Description: The third in this series of reports presents tables dealing with the growth and decay of members of the thorium family of naturally occurring radioisotopes. The general equations and approximations used in computing these tables are the same as those presented in Part I of the series.
Date: November 17, 1952
Creator: Kirby, H. W.
Partner: UNT Libraries Government Documents Department

Process for Removing Radioactive Wastes from Liquid Streams

Description: The process is under development at Mound Laboratory to remove radioactive waste (principally plutonium-238) from process water prior to discharge of the water to the Miami river. The contaminated water, as normally received, is at a pH between 6 and 90. Under these conditions, plutonium in all its oxidation states is hydrolyzed; however, the level of the radioactive solids varies from about 50ppm down to about 50 ppb and the plutonium remains in a colloidal or subcolloidal condition. The permissible concentration for discharge to the river is about 50 parts per trillion. Pilot plant test show that 95-99% of the radioactive material is removed by adsorption on diatomaceous earth. The remainder is removed by passage through a bed of either dibasic or tribasic calcium phosphate. Ground phosphate rock is equally effective in removing the radioactive material if the flow rate is controlled to permit sufficient contact time. Parameters for optimizing the process are now under study. Future plans include application of the process to wastes from reactor fuels reprocessing.
Date: October 1, 1972
Creator: Kirby, H. W.; Blane, D. E. & Smolin, R. I.
Partner: UNT Libraries Government Documents Department

Radium Determination by Alpha Counting (Final Report)

Description: Abstract: A method is described for the determination of radium by alpha counting. A dilute hydrochloric acid solution of the radium sample is passed through a short column of copper powder to remove polonium. The effluent is mounted on glass slides and alpha counted four to five hours after mounting. Twenty-four hours after mounting, the slides are counted again, and the percentage increase in counts is used to determine a correction factor for the growth of radon and its daughters. Precision and accuracy are within the limits of the counting instrument used.
Date: March 15, 1952
Creator: Kirby, H. W.
Partner: UNT Libraries Government Documents Department