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Approximate methods for pile design calculations

Description: From introduction: "At a certain stage in the design of a pile there come a time when it is urgent to obtain day to day answers on the effects of various changes in the design parameters... It is hoped that the procedures described in the present memo will serve as a bridge between the crudest diffusion theory calculations and the more elaborate multi-group methods."
Date: 1947
Creator: Brooks, Harvey

The Application of Tracer Techniques to the Determination of Uranium Extraction Coefficients

Description: Abstract: This report deals with the development of a method using tracer technique for determining uranium extraction coefficients on solutions of low uranium concentration. It was found that extraction coefficients could be determined on systems containing as low as one part per million uranium using 1900 level uranium as the tracer. Results of several extraction series are presented in which aluminum nitrate is used as the salting agent and dibutyl carbitol the organic extractant.
Date: January 23, 1947
Creator: Lee, D. A.; Woodard, R. W. & Clewett, G. H.

Insufflation studies in rabbits with dusts of uranium compounds

Description: From abstract: "In a large series of rabbits, both the responses exhibited by the animal and the fate of the dose have been observed following the intratracheal insufflation of a soluble (uranyl nitrate) and an insoluble (U30g) compound, large (100mg) and small (5 and 10mg) doses have been given. For comparison, in a third series of tests a large fose of uranyl nitrate was injected intramuscularly."
Date: 1948
Creator: Thompson, Herbert. E. & Steadman, L. T.

Analytical methods and results

Description: Report detailing the analytical methods and results of a study designed to measure the total alpha particle activity of samples. The method being used was previously in use at Columbia University. The report recognizes potential for grave errors, but makes no effort to minimize the effect of the roughness of the sample.
Date: 1945
Creator: Thomas, Henry C. & Bither, Tom Allen

Application of Conductivity Measurements to a Study of (a) Complex Formation Between F[ Gamma] + and F- and Al+ + + and F- (b) Titration of F- Ion with H + Ion

Description: From introduction: This report describes some preliminary electro-conductometric titrations which were made in order to ascertain whether the method [for selecting the best complexing agent for any problem that may arise] gave interpretable results.
Date: 1945
Creator: Tober, Frank W., 1919-1995 & Larson, Clarence E.

Application of Ascorbic Acid Method to Uranium in Salvage Solutions

Description: Abstract: The erroneously high values for uranium content of salvage solutions as determined by the ether extraction-ascorbic acid procedure have been demonstrated to be due to the presence of colored organic materials in these solutions. Evaporation of such solutions to fumes of HC104 before extraction has been shown to be completely successful in preventing such interference while pretreatment with activated carbon is sufficiently successful for application in Control laboratories. Complete procedures for application of either protreatment and results of such application to composite salvage solutions received over a six-month period are included.
Date: June 11, 1947
Creator: Rothenberger, C. D. & Grimes, W. R.

Beta Magnet Current Stability

Description: Abstract: A TEC regulator amplifier driving an Eaterline-Angus recording meter was used to record magnet current variations. Tests were made to determine magnet current variations. Tests were made to determine magnet current stability for currents from 500 amperes to 4000 amperes. Changes were necessary in both the TEC and GE regulators before currents below 2500 amperes could be regulated. Regulation to 0.025 percent for and hour was obtained for currents of 1000 to 4000 amperes with the TEC and GE regulators, and regulation to 0.05 percent for 500 ampere currents.
Date: June 8, 1947
Creator: Hudson, E. D. & Becker, M. C.