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The basis for design of mixer-settlers for the Amex solvent extraction process, which uses long-chain amines dissolved in a hydrocarbon diluent for the recovery of U from acid sulfate solutions typical of those obtained in U ore processing, was determined by a unit-operations study in scale-model units. Long- term recycle tests in countercurrent equipment demonstrated the stability of amines and the general feasibility of the Amex process. Mass transfer rates of U for both extraction and stripping are large, and greater than 90% stage efficiency was readily obtained. The flow capacity of gravity settlers is generally limited by a dispersion band, which increases exponentially with flow rate. The scaleup of settlers is based on the constant flow rate of dispersed phase per unit settler area and constant band thickness. The nominal flow capacity (50% of flooding) ranged from 0.4 to 0.8 gpm/ft/sup 2/, depending on the type of dispersion and amine used. The capacity can be increased (fourfold) by using packing wetted by the dispersed phase. Emulsion stabilized by silica (the worst offender) can be minimized by controlling the mixing in order to form solvent-continuous dispersions, which also minimizes entrainment of solvent in the aqueous waste. (auth)

Separate abstracts were prepared for 7 sections of this report. A list is included of publications during the period covered by this report. (C.H.)

Separate abstracts were prepared for thirty-three of a total of thirty- four sections in the report. The section for which no abstract was prepared concerned construction and out-of-pile testing of a third in-pile slurry loop experiment. (J.R.D.)

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It is shown that vector mesons may become Regge particles in higher orders of renormalizable perturbation theory. (auth)

This document discusses the leak repair of the 107-D retention basin. Leakage of effluent water from the 107-D Basin had increased from 6000 gallons per minute in November of 1959 to the peak of 8000 gallons per minute in April of 1963. Washout of fines had apparently created large voids beneath the north and west walls and endangered the integrity of the structure by settling the wall 2 in. at one place. The leakage was arrested in March of 1963 by filling the voids with concrete and grout and sealing the repairs with a newly developed sealant. Present total leakage is 3750 gallons per minute.

This report, from the Chemical Processing Department at HAPO for April 1963, discusses the following: Production operation; Purex and Redox operation; Finished products operation; maintenance; Financial operations, facilities engineering; research; employee relations; and weapons manufacturing operation.

This document details activities of the N-Reactor Department during the month of April 1963.

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This report addresses the conference on clean room specifications held at Sandia Laboratory Albuquerque, New Mexico during April 9 and 10, 1963.

Monthly magazine discussing natural resources, parks, hunting and fishing, and other information related to the outdoors in Texas.

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Design and construction specifications to be followed in the development of the reactor, its associated systems and experimental facilities, and the housing and required services for the facility are presented. The testing procedures to be used are outlined. (D.C.W.)

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A survey was made of methods potentially useful for the determination of the oxygen to metal ratio in mixed oxides of uranium and plutonium. A gravimetric method was selected as being the most promising for adaptation in a short period of time. Development of the technique resulted in a reliable method which meets the requirements for unirradiated mixed oxide fuel samples. The method, based upon an equilibrium weight at 700 deg C in dry hydrogen, was shown to be capable of measurement of O/(Pu + U) ratios in 20% PuO/sub 2/--80% UO/sub 2/ pellets with a standard deviation of plus or minus 0.001. (auth)

A system analysis was performed to establish the design and performance characteristics of 250- and 1000-Mev MHD generators. The results are presented, and the necessary equations are derived. The results of environmental tests that investigated boundary and bulk conductivity, structural concepts, and combustion phenomena are included. The other five volumes of the report are summarized, together with the principal conclusions. (D.C.W.)

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This document describes procedures to be followed and the equipment necessary to perform the assembly of the phase 1 vibration Core and the Inner Reflector. It contains the sequence of operations and identifies additional documentation and supplementary information.

Two models of a liquid-hydrogen (?-illegible) Cherenkov counter (illegible) been constructed (illegible). The first served as a prototype (?-illegible) and was (illegible) to demonstrate the feasibility (?-illegible) of the (illegible) concept (?-illegible) (illegible) liquid hydrogen does not give scintillation (?-illegible) (illegible) that of Cherenkov light. The second, final version (?-illegible), (illegible) in an experiment (?-illegible) in which particles brought to rest (?-illegible) (illegible) (illegible) electrons. In this second counter, the efficiency (?-illegible) (illegible) relativistic (?-illegible) particles (?-illegible) by their Cherenkov radiation in liquid hydrogen (?-illegible) was measured by stopping (illegible) mesons in the hydrogen and detecting their decay electrons outside (?-illegible) of the flask (?-illegible) after a suitable time delay. An average detection (?-illegible) efficiency (?-illegible) of 75% (?-illegible) was (illegible) taken over the volume of the hydrogen (?-illegible).