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  Partner: UNT Libraries Government Documents Department
 Decade: 1940-1949
 Year: 1946
Method for Measuring Fast Decay of a Near Critical Assembly

Method for Measuring Fast Decay of a Near Critical Assembly

Date: July 14, 1946
Creator: Woodward, W.
Description: This paper contains a description of the apparatus and theories of the methods successfully used for determining the fast decay periods of near-critical assemblies. The methods described are: (1) the modulation method and (2) the delayed coincidence or Rossi method
Contributing Partner: UNT Libraries Government Documents Department
Comparison of Normal Process and Single Process (XC) Uranium

Comparison of Normal Process and Single Process (XC) Uranium

Date: October 7, 1946
Creator: Cleaves, H. E.
Description: Certain difficulties have been encountered in attempts to substitute a 'one-step' casting process, developed at Iowa State College, for the 'normal' process generally used for the production of extrusion billets. In the 'one-step' process molten metal is delivered from the reduction bomb to the billet mold instead of allowing the metal to solidify in the bomb with subsequent vacuum remelting of the biscuit metal before casting in the billet mold. Routine analyses had failed to establish significant differences in the composition of normal and one-step metal. The one-step billets had been extruded satisfactorily, and finished slugs were prepared and subjected to the usual canning operation. In subsequent tests however, it was found that a large percentage of the canned slugs were badly defective. An investigation was requested to determine the differences in composition or structure of the X-C and normal metal which would account for the failure of the X-C slugs. Samples of the failed slugs and of metal from various stages of both the one-step and normal processes were supplied by Madison Square Area, for comparison on the basis of analyses, microstructure, or such other tests as seemed desirable.
Contributing Partner: UNT Libraries Government Documents Department
Treatment of Torbernite

Treatment of Torbernite

Date: January 21, 1946
Creator: Brimm, E. O., Dr.
Description: Production of black oxide from torbernite was studied on a laboratory scale from the standpoint of uranium extraction, reagent requirements, and removal of impurities. A small portion of the material was examined for its mineral constituents, using optical properties, X-ray diffraction patterns, and chemical analysis for identification. About 50% of the material was quartz; 30% green crystals of a copper-uranium phosphate; 10% of a black mineral, which was not identified, but which appeared to be an oxide mixture of nickel, cobalt, copper, and molybdenum; and small amounts of gibbsite, laterite and feldspar. There were no lower oxides of uranium in the sample.
Contributing Partner: UNT Libraries Government Documents Department
A Study of the Distribution of Impurities in the Extraction of Uranyl Nitrate with Ether from Aqueous Solutions

A Study of the Distribution of Impurities in the Extraction of Uranyl Nitrate with Ether from Aqueous Solutions

Date: April 1, 1946
Creator: Conard, C. R.
Description: Early in 1942 it had been found on a laboratory scale that certain impurities such as the Rare Earths were removed by small water washes from an ether solution of Uranyl Nitrate. It was hoped that in the large production units to be constructed that the water soluble impurities would all be washed out by the time the radioactive Thorium had been removed, so that the decrease in radioactivity could be used as an index of the amount of all kinds of impurity remaining in the ether layer. Experience has taught both the production and the laboratory chemist to view with suspicion a process which claims to separate one element from all others in the periodic system with a simple set of manipulations such as an extraction. Furthermore, there is the familiar example of iodide ion which anyone would expect to be oxidized to iodine and then be transferred almost quantitatively to the ether layer from which it would not wash out. It seemed reasonable that other elements or ions would be found which would fail to wash out of the ether layer. Since the objective was the removal of the neutron absorbers whether their danger coefficients were especially high ...
Contributing Partner: UNT Libraries Government Documents Department
Cloud Chamber: Heat Shielding, Magnet Shielding

Cloud Chamber: Heat Shielding, Magnet Shielding

Date: 1946
Creator: Hering, D.
Description: Technical drawing of a cloud chamber and ionization chamber for use in nuclear reactors.
Contributing Partner: UNT Libraries Government Documents Department
Cloud Chamber: Camera Lights Assembly

Cloud Chamber: Camera Lights Assembly

Date: 1946
Creator: Hering, D.
Description: Technical drawing of cloud chamber and ionization chamber for use in a nuclear reactor.
Contributing Partner: UNT Libraries Government Documents Department
Simpson Proportional Alpha Counter

Simpson Proportional Alpha Counter

Date: 1946
Creator: Simpson, J. A.
Description: Declassified Manhattan Project figure of Simpson Proportional Alpha Counter.
Contributing Partner: UNT Libraries Government Documents Department
300-400 V Regulated Supply

300-400 V Regulated Supply

Date: 1946?
Creator: U.S. Atomic Energy Commission
Description: 1 technical drawing of a regulated supply of 300-400 volts for nuclear reactors.
Contributing Partner: UNT Libraries Government Documents Department
10 M.C. Wide Band Amplefier and Scope

10 M.C. Wide Band Amplefier and Scope

Date: 1946
Creator: Elmore, W. C.
Description: Technical drawing of an amplifier for a nuclear reactor.
Contributing Partner: UNT Libraries Government Documents Department
Model 500 Amplifier

Model 500 Amplifier

Date: 1946
Creator: Elmore, W. C.
Description: Technical drawing of an amplifier for use in nuclear reactors.
Contributing Partner: UNT Libraries Government Documents Department
Pulse Analyzer: 1-Channel

Pulse Analyzer: 1-Channel

Date: 1946
Creator: U.S. Atomic Energy Commission
Description: Technical drawing of pulse height analyzer for use in nuclear reactors.
Contributing Partner: UNT Libraries Government Documents Department
Scale of 64 with R.F. Power Supply - Model 400

Scale of 64 with R.F. Power Supply - Model 400

Date: 1946
Creator: Higinbotham, W.
Description: Technical drawing of electronic circuits and power supplies to nuclear reactors.
Contributing Partner: UNT Libraries Government Documents Department
Counting Rate Meter - Model 100

Counting Rate Meter - Model 100

Date: 1946
Creator: Sands, M.
Description: Technical drawing of counting circuits and electronic circuits for use in nuclear reactors.
Contributing Partner: UNT Libraries Government Documents Department
Model 100 Amplefier

Model 100 Amplefier

Date: 1946
Creator: Sands, M.
Description: Technical drawing of amplifiers for use in nuclear reactors.
Contributing Partner: UNT Libraries Government Documents Department
Model 100 Precision Pulser

Model 100 Precision Pulser

Date: 1946
Creator: Sands, M.
Description: Technical drawing of pulse generators and techniques for nuclear reactors.
Contributing Partner: UNT Libraries Government Documents Department
Preamplifier: Amplifier & Limiter

Preamplifier: Amplifier & Limiter

Date: 1946
Creator: U.S. Atomic Energy Commission
Description: Technical drawing of amplifiers for use in nuclear reactors.
Contributing Partner: UNT Libraries Government Documents Department
Estimation of Small Quantities of Uranium in Thorium

Estimation of Small Quantities of Uranium in Thorium

Date: 1946
Creator: Weissman, S. I. & Duffield, R. B.
Description: Abstract: "Estimation of the intensity of the uranyl fluorescence furnishes a method for the determination of quantities of uranium as low as one-half microgram of uranium in one-half illilitor of glassy phosphoric acid. The test has been used to detect directly three parts of uranium in one million parts of thorium" (p. 1).
Contributing Partner: UNT Libraries Government Documents Department
Model 501 Amplifier

Model 501 Amplifier

Date: 1946
Creator: Elmore, W. C.
Description: Technical drawing of amplifiers and electronic circuits for use in nuclear reactors.
Contributing Partner: UNT Libraries Government Documents Department
Report on a Magnetic Drive Design for the Fercleve Coporation

Report on a Magnetic Drive Design for the Fercleve Coporation

Date: 1946?
Creator: Williams, W. D.
Description: This report discusses the development of a design for a "permanent magnet drive to couple a motor shaft with a pump impeller through a thick metallic diaphragm of small diameter. [...] The following report presents the procedures and results of the magnetic drive development up to date of cancellation and includes the general features of the design which would have been recommended if the contract had not been cancelled" (p. 1).
Contributing Partner: UNT Libraries Government Documents Department
Report of the Chief of the Forest Service: 1946

Report of the Chief of the Forest Service: 1946

Date: 1946
Creator: United States. Forest Service.
Description: Annual report from the U.S. Department of Agriculture Forest Service describing activities of the organization, expenditures and receipts, and a discussion of other relevant topics for the fiscal year.
Contributing Partner: UNT Libraries Government Documents Department
Agitation tests

Agitation tests

Date: August 18, 1946
Creator: Work, J.B.
Description: This report, from the Hanford Plant, May 22, 1956, describes the need, design, and testing plans for an agitator to aid in dissolution.
Contributing Partner: UNT Libraries Government Documents Department
Protective measures for personnel

Protective measures for personnel

Date: December 13, 1946
Creator: Nickson, J.J.
Description: This document addresses radiation protection concerns for workers in the experimental laboratories and production plants where nuclear fission piles are being used. A broad in-depth discussion is provided based with the experiences gained in the Manhattan Project and being applied to contemporary activities. Discussion is thorough and encompasses control of external irradiations including alpha, beta, gamma, and neutron radiations; and control of radioactivity within the body by control of inhalation, ingestion, and entrance through skin or wounds. General measures for the control of radiation hazards is addressed by provision of clothing and waste disposal. An Appendix 1 is entitled General Rules and Procedures Concerning Activity Hazards.
Contributing Partner: UNT Libraries Government Documents Department
A study of the quartz fiber balance No. II

A study of the quartz fiber balance No. II

Date: April 11, 1946
Creator: Nelson, G.A.
Description: This report describes calibration studies for the quartz microbalance {number_sign}2 and problems with drift.
Contributing Partner: UNT Libraries Government Documents Department
Tolerance to Sr{sup 89} and radium

Tolerance to Sr{sup 89} and radium

Date: July 22, 1946
Creator: Brues, A.M.
Description: Problems in extrapolation of the rate of tumor formation by strontium 89 from animal to man are addressed. Focus of this paper is on variability of latency period between different animals.
Contributing Partner: UNT Libraries Government Documents Department
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