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Preliminary data have been obtained on the effect of temperature on the tensile properties of a Pu-0.9 w/o Ga delta stabilized alloy. Contoured castings for tensile specimen fabrication were obtained by pouring in vacuo from 900 {degrees}C into a MgO coated graphite mold heated to 475-500 {degrees}C.

This volume which deals with the radiochemistry of uranium is one of a series of monographs on radiochemistry of the elements. There is included a review of the nuclear and chemical features of particular interest to the radiochemist, a discussion of problems of dissolution of a sample and counting technique, and finally, a collection of radiochemical procedures for the element as found in the literature.

Metals and alloys germane to thermionic energy converter usage were screened for embrittlement by liquid cesium. Techniques are described for more detailed studies of ceramics and susceptible metals. Definite reductions in tensile ductility were observed for 302 stainless steel and molybdenum. Bend ductility was lowered in titanium, titanium-8 aluminum-4 vanadium alloy, niobium, tantalum, and silver-- copper eutectic solder. Some difficulty in reproducibly wetting samples was evident. Slightly contaminating the cesium with oxygen (or water) was observed to increase cesium wettability. (auth)

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This report provides a summary of the Nuclear Effects Group Program for fiscal year 1963. Efforts in space physics and instrumentation are detailed for the space exploration effort. Pinex type experiments are proposed, as are Phonex, Nuclear Emulsion Research and Low Energy X-Rays Measurements projects.

References to 529 articles on nuclear reactor control, kinetics, and stability published before autumn 1962 are included. Emphasis is on calculations and theory since the references serve as an aid in analyzing the dynamic behavior of SNAP reactor systems. (D.C.W.)

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During this period, plutonium wire was extruded and three crystal growing tests were performed in the modified Andrade apparatus. In addition, continued effort has been placed on the fabrication of the high burnup irradiation test specimens, on additional UO2-PuO2 sintering studies and on oxygen diffusion and thermal expansivity measurements.

A total of 107 abstracts is presented on analytical methods for alkali metals, as a part of a program for the evaluation of the performance of the primary cold trap from the Enrico Fermi Reactor. The abstracts are arranged into sections dealing with general aspects; sampling and dissolution techniques; and determination of uncombined alkali metal, oxygen, carbon, hydrogen, nitrogen, and other impurities. (D.L.C.)

Progress in radiobiology and caneer research is reported. Topics covered include: comparison of the effects of isologous, homologous, and heterologous hematopoietic tissues on post-irradiation survival; survival of transfused blood in rats; erythropoietic response to erythropoietin; inhibition of erythropoiesis by estrogens; tryptophan metabolism; effect of daily exposure to l5-r gamma radiation on susceptibility of mice to experinrental infection; restorailon of serum bactericidal activity and prevention of its loss in x- irradiated mice; immunohistochemical study of Ehrlich ascites tumor; comparison of effects of I/sup 131/-induced hypothyroidism and L-triiodothyronine on irradiated hair roots in mice; modification of radiation responses of tissue by colchicine; production and use of I/sup 131/; localization of ocl evaluation of brain scanning system; thick target yield and excitation function for the reaction Rh/sup 103/(p,n)Pb/sup 103/; incorporation of C/sup 14/ and tritium precursors into brain; net synthesis of RNA with a microleial enzyme requiring DNA and four ribonueleoside triphosphates; snythesis of (P/sup 37/) uridine 5'- phosphate; and of 17- alpha -hydroxyprogesterone-4-C/sup 14/-l7 alpha -caproate by homogenates of rat liver and human placenta. (M.C.G.)

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Progress is reported on the organic-cooled reactor program under the topics: organic coolant research, EOCR experimental projects, and EOCR operations. Separate abstracts were prepared for each topic. (M.C.G.)

This is the monthly report for the Hanford Laboratories Operation, February 1961. Metallurgy, reactor fuels, chemistry, dosimetry, separation processes, reactor technology, financial activities, visits, biology operation, physics and instrumentation research, and employee relations are discussed.