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POWER REACTOR PROGRAM. PROGRESS REPORT TO SAVANNAH RIVER OPERATIONS OFFICE, UNITED STATES ATOMIC ENERGY COMMISSION FOR THE PERIOD MARCH 1, 1961 THROUGH MARCH 31, 1961

Description: An evaluation of two thin-walled outer tubes showed that more extensive alpha working of the billet core stock results in more uniform cladding on the extruded tube. In an effort to eliminate breakthrough and to reduce eccentricity, shift, and bending of the mandrel, two experimental coppernickel billets with Zircaloy sleeves were extruded to check a modified billet design. lt was observed that the final grain size of the unalloyed uranium core of a thin- walled outer tube is insensitive to small variations in the cooling rate from the beta-treatment temperature. An axia' load of 3000 pounds applied to a thin- walled outer tube during autoclaving was ineffective in preventing bowing of the tube. Shipping experiments demonstrated that current packaging methods of thin- walled inner tubes do not prevent bowing during transit. The fabrication of specimens for the capsule irradiation program was concluded with the shipment of sixteen specimens and excess extruded tube stock to Savannah River Laboratory. The following core compositions were represented: U-1 wt.% Si, unalloyed dingot uranium, U-0.3 wt.% Al-0.5 wt.% Si, and U-0.3 wt.% Cr-0.3 wt.% Mo. All irradiation specimens were supplied in the beta-treated condition. The mechanical behavior of Zircaloy-4-clad dingot uranium tube sections was evaluated as a function of the cooling rate from the beta treatment temperature. The results indicate that the mechanical behavior is approximately independent of the cooling rate and that, in testing to failure, fracture initiates within the core. Also, in a eimilar test of a transient-melted ingot uranium tube, the uranium core appeared to be the most brittle component. Five tubular stainless steel- Zircaloy joints were extruded for use in an experiment to determine if such joints can withstand 30 and 40% cold reductions. (auth)
Date: May 11, 1961
Creator: Isserow, S.; Anderson, R.W.; Richmond, W.J.; Tuffin, W.B.; Larson, W.L.; Smoot, P.R. et al.
Partner: UNT Libraries Government Documents Department

A METALLOGRAPHIC STUDY OF GAS BEHAVIOR IN URANIUM IRRADIATED WITH ALPHA PARTICLES

Description: The behavior of helium in uranium and in several uranium alloys was studied metallographically after room temperature irradiation with alpha particles in a cyclotron, followed by various heat treatments. The observed gas bubbles were classified in two classes, differing in size, concentration, and mechanism of formation. These bubbles appear to resemble those resulting from fission product gases in neutron-irradiated uranium; the findings of this study seem to be applicable to the understanding of the factors affecting bubble formation and thus to the suppression of swelling in neutron-irradiated materials. (auth)
Date: September 28, 1962
Creator: Green, H.M.
Partner: UNT Libraries Government Documents Department

Fabrication and Properties of Seamless Tungsten Tubing

Description: A process for the production of seamless tungsten tubing is described. The process consists of the extrusion of sintered powder sleeves at elevated temperatures to sizes close to the final dimension. The tubing is finished by warm drawing. A size range of 0.100-in, diameter to 1 1/2-in. diameter has been fabricated. A preliminary evaluation of properties of the extruded tubes is given. (auth)
Date: October 31, 1964
Creator: Loewenstein, P.; Hunt, J. G. & Jenkins, R. G.
Partner: UNT Libraries Government Documents Department

LITERATURE SURVEY OF GASES IN BERYLLIUM. Report to Wright Air Development Division

Description: Structural and thermodynamic properties of beryllium, beryllium-oxygen systems, beryllium-nitrogen systems, and beryllium-hydrogen systems as determined by various researchers are surveyed. Diffusion properties, reaction kinetics, and vapor pressures are given where they were available. 44 references. (D.C.W.)
Date: January 17, 1961
Creator: Pemsler, J.P. & Anderson, R.W.
Partner: UNT Libraries Government Documents Department

SUMMARY OF PROGRESS ON THE STUDY OF BETA TREATMENT OF URANIUM, NOVEMBER 1, 1959-AUGUST 31, 1960

Description: Variables affecting the texture and grain size of uranium during beta treatment are summarized. The study of the effect of time and temperature in the beta phase on the growth index (G3) and grain size of the final alpha product is tentatively believed to show that higher beta temperatures for short times (up to about seven minutes) tend to promote slightly more negative growth indices and that higher beta temperatures give rise to somewhat finer grain sizes. Results of studies of both Jominy end-quenched bars and several full-sized rods and tubes quenched by total immersion showed that large thermal gradients promoted negative growth indices and produced grains somewhat elongated in the direction of the thermal gradient. The effects of endcooling in full-sized pieces quenched by total immersion in cold water showed that the axial growth index is negative up to distances from the end of about half the wall thickness of tubes and about half the radial dimension of rods. The grain refinement penetrates to a lesser distance from the ends. In the radial direction the growth index for these same pieces is largely negative to a distance below the outer diameter of about midwall in two tubes studied. In the case of one tube which was studied more completely, the growth index became negative again as the inner diameter was approached. A water-quenched rod was found to have a negative growth index down to a distance from the surface of about midradius. (auth)
Date: September 23, 1960
Creator: Russell, R.B.
Partner: UNT Libraries Government Documents Department

STUDY OF THE BETA TREATMENT OF URANIM. Progress Report to the Oak Ridge Operations Office for the Period November 1, 1959-April 1, 1960

Description: Activities in a program to determine the effects of product size (or dimensions), composition, and heat treatment on beta-treated U are reported. Progress to date was chiefly confined to organizing the program and setting up equipment. A Jominy end-quench apparatus was constructed, and preliminary experiments were run on as-cast metal to test the Jominy-oscillographthermocouple system. Results are tabulated. The method to be used for characterization of beta-treated samples by determination of growth index and texture is also described. (J.R.D.)
Date: April 18, 1960
Creator: Russell, R.B.
Partner: UNT Libraries Government Documents Department