From introduction: Complete removal of fluorine iron waste gases also containing uranium hexaflouride was the object of researches described in this chapter.

The following report provides data based off of the solubility of sodium uranyl acetate that was measured under a variety if conditions.

Abstract: This discussion concerns the operation, construction, and servicing of an alpha rate meter of medium sensitivity (30,000 alpha particles full scale per minute) and good stability. The instrument is equipped with an oscillator which increases both in frequency and loudness as the alpha activity is increased. The oscillator circuit includes an anticipator which causes a change in frequency depending directly upon the rate of change of alpha activity. Maximum sensitivity is approximately 100 millivolts full scale. Grid current varies from 1 to 5 x 10^-14 amperes. A general discussion of time constants and accuracy is included. Tables of stopping power, ionization and alpha activity are appended.

The following report discusses findings resulting from experiments on recycled carbon tetrachloride at various stages of the proposed purification process.

Abstract. The distribution coefficient of U(VI) between perchloric acid solutions and benzene solutions of TTA has been measured as a function of the acidity. It was possible to interpret the data in terms of the charge on the U(VI) species present in the aqueous phase. The experiments indicate that U(VI) exists as an ion charge +2 at acidities from 0.1M to 2.5M. In the interpretations of the distribution data, it was necessary to know the acidity coefficient of the uranyl chelate in the benzene solution. This was determined by measurement of the solubility of the compound UO2K2 - xH2). The activity coefficient of UO2K2 was found to decrease rapidly as the concentration of TTA in the benzene phase increased above 0.1M. This is probably due to the formation of a species involving more than two TTA molecules per U(VI)

Technical report. Numerous application of various column adsorption techniques to inorganic analytical chemistry have appear in the literature. The comparatively recent introduction of ion exchange resins has resulted in the development of efficient, simple, and rapid column adsorption methods. the principal service of column adsorption methods to analytical chemistry is that of providing a relatively simple means of separating an element in a sufficiently pure state so that a direct precipitation, ignition, and weighting, for example, will suffice to complete the quantitative analysis. Systems involving uranyl nitrate will naturally be emphasized in this report but information will be included concerning the separation of the individual members of a series from one another, such as in the alkaline earths and the rare earths.

The following report follows an investigation conducted to compare some physical and chemical properties of Brush beryllium bars made by their process "Q" and with those of extruded bars made from cast metal, from compressed Clifton flake metal, and from compressed turnings resulting from machining of previously extruded cast metal.

The following report describes the methods of chemical conversion of uranium fluoride to uranium trioxide.

From abstract: "Experiments covering the coprecipitation of Thorium and Uranium peroxides are described on synthetic and actual 1300 cycle machine wash effluents."

From introduction: This report is concerned primarily with the coprecipitation phenomenon and its application to plant problems.

Abstract: "The results obtained from the tests conducted for the purpose of determining the corrosivity of a 30 percent-solution of uranyl fluoride to various metals indicate that stainless steels (type 302, 304, 321 and 316) have very good resistance; while monel, nickel and aluminum, respectively, exhibit diminishing resistance. Stainless steel, type 316, was the most resistant of the specimen tested."

Abstract: "Using xylene as the densimetric solvent, the crystal densities have been determined by the pyknometric method for the following chlorides, UCl3, UCl4, UCl6(UCl4), UCl6 and U02Cl2."

The following report discusses the deposition of radioactive elements during a nuclear fission in the skeleton. Studies are concerned with chronic effects of toxic radiation developing within the bone marrow and decontaminating the cells.

Abstract: "Tests have been developed for both the qualitative detection and quantitative determination of fluorine in chlorine. The qualitative test is made by passing the gas through manganous chloride. If the pink solid tubes brown there is greater than 0.5 percent of fluorine in the gas. The quantitative test is a modification of the Steiger and Marvin Test with oxidized titanium solution."

Abstract: "The possibility of detecting small quantities of uranium with an X-ray spectrometer was investigated. An X-ray spectrograph was modified by substituting a geiger counter for the photographic film. Both primary and secondary methods of excitation were studied. Radiation background of high intensity and variability limits the sensitivity of the present apparatus to 1%. Suggestions are made for increasing the sensitivity of the method."

Abstract: "A method for the determination of small quantities of thorium in the presence of large quantities of uranium is presented. Solid samples are dissolved in an appropriate acid. Reducible metals are removed by means of a mercury cathode. Excess acid is removed by fuming to dryness. The residue is dissolved in water and made alkaline with saturated ammonium carbonate solution, thus complexing the uranium and permitting the precipitation of thorium hydroxide with the aid of an aluminum hydroxide carrier. Thorium is determined colorimetrically with thoron."

The following report describes methods used to interpret analytical results of the molecular weight of tuballoy pentachloride.

Introduction: "The product of a special run made in XAX was submitted to the Assay Department for a determination of the residual content of the 235 isotope. The charge material on this run was impoverished, with a ratio of approximately 1:2,000. The sample was submitted in the form of purified T3O8."

"In consideration of the known high efficiency of penta-ether on the extraction of [Uranium] from aqueous solution without particularly affecting most other cations in the solution, it was felt that a TNU (total non-U cation) determination could be based upon the use of pents-ether to remove the U from non-U cations. After such separation, the non-U cations could then be determined in essentially the same manner as in the present TNU method (Method 50, CD-3801). The use of the penta-ether separation would have the advantage of reducing the amount of handling of the sample required in the present procedure and of reducing the time required to complete a TNU determination."

Abstract: "A polarographic method for the determination of tuballoy in thorium peroxide cakes in all sold medium was found to give satisfactory results. Fluorescent analyses on effluents containing thorium gave good results if the thorium content was kept below 1 mg/liter."

This report deals solely with the systematic diagnosis and location of the cause of instability of an assay mass spectrometer. It is based around a chart that illustrates the general practices followed in the laboratory.

Abstract. A satisfactory method has been found for dissolving thorium metal and thorium oxide in heat-treated 25-12 stainless steel vessels without excessive corrosion of the vessels. The dissolution medium consists of strong HNO3 containing a small amount of fluoride or fluo-silicate. the fluoride required has no harmful effects on a subsequent solvent-extraction step for a separation of uranium isotopes from the dissolved thorium.

With discussion under way concerning power production by chain reacting piles, it becomes pertinent to consider the ration of the temperature of the hottest spot in the pile to the average exit temperature of the cooling stream. This is important because the temperature of the hottest spot in the pile is one of the limiting factors in determining the maximum power at which a pile can be operated. However, the higher the temperature of the emerging cooling stream, the more efficient can be the thermal engine operated by it. Thus the ideal situation is to have the average exit temperature of the cooling stream as near as possible to the hottest temperature of the hottest spot in the pile.

This report follows a test made to determine the effect of temperature on the distribution of nitric acid between "carbitol" and gunk, extracting a number of samples of aqueous copper nitrate with samples of "carbitol" of various acidities. The data obtained is covered in Table 1.