The mean heat capacity of a sample of powdered U/sub 3/O/sub 8/ was determined as a function of temperature from measurements of heat content. A thin-walled nickel capsule containing the material was heated in an electric furnace and dropped into a water calorimeter The Mean heat capacity values calculated from the experimental data were nearly constant over the temperature range, room temperture to 250-975 deg C (482-1790 deg F). The average value was 0.074 plus or minus 0.004 cal gm/sup -1EDE/C/sup -2/ (0.074 plus or minus 0.004 Btu lb/sup -1 deg F/du p -1/). From 975-1100 deg C (1790-2012 deg F) a small rise was observed. (auth)

This document details activities at the Hanford Works during the month of June 1948.

This document details activities at the Hanford Engineer Works during the month of December 1948.

This technical progress report details 100 Area activities for the time period of July 16 through July 22, 1946.

Reported are: physics (B pile, D pile, F pile, general physics); and water, corrosion and engineering (process water control and pressure drop studies, purging studies, removal of process tube B-3671).

This report contains data acquired during sampling of the Columbia River water on March 26, 1945. Topics of discussion include; the elevation of chlorine levels from 4 ppm to 20 ppm, what steps should be taken to remediate the problem, and the various processes that were taken into consideration for the clean up of this chlorine. Separation processes considered include; ion exchange, distillation, precipitation, heat exchange, and recirculation through a cooling tower.

Progress on finding suitable water conditions for start-up had been approached as closely as possible with our present equipment and information as to the requirements. The water composition should be attainable that is not corrosive or build up a film rapidly, and we have means available for removal of such films. Slug classification methods were analyzed from a dimensional standpoint. Analysis of current CMX data was undertaken with the objective of establishing allowable variations in pressure drop in W-tubes due to film formation. Calculations were made of the number of slugs which have jacket temperatures in excess of various values, for various loading arrangements. On July 26 the proposed loading of the discharge nozzle is to be checked on CMX tube 1 during an inspection shut-down. Evacuation procedures in the event of a catastrophe in the 100-B area were discussed with W.E. Rapp during a visit to that area on July 19, 1944. Tests for slug leaks will not be less severe with water in the autoclave than with steam, and have a considerable chance to be more decisive, especially if a wetting agent is added to the water. Calculations were made on the sensitivity to be expected from three …

None

At the shutdown of the B Pile, 269 active tubes were discharged and ten poison columns were charged. As a result, the pile was let considerably below critical. The present test described in this report was set up to develop methods of detecting possible changes in reactivity by periodic measurements of neutron flux in the shutdown pile. The irradiation of indium foils in an empty process tube was found to provide a satisfactory method of monitoring the shutdown pile, and was sensitive than the proportional counter with was also tried. The accuracy with which the subcritical condition can be determined is roughly 20%. The uncertainty is due mostly to the irregular arrangement of metal and poison in the unit and the resulting difficulty in representing the neutron flux mathematically.

This report details Technical Division activities for the week ending May 22, 1943.

None

A detailed description of the processing of pitchblende ores used at the Port Hope, Canada, refinery is given including both the recovery and purification of U and Fu. The health hazards present in the processing are discussed, and recommendations are made which will insure adequate health protection. (L.T.W.)

None

None

None

None

None

This technical progress report summarizes work at the Hanford Engineer Works` 100 Areas, 300 Area, 200 Areas for December 15, 1946 through December 21, 1946. (JL)

The method used for the preparation of uranium metal in a fused state was reduction of uranium chloride with calcium in a refractory-lined bomb. The reaction was started by externally heating the bomb with a gas flame. The metal was obtained in a solid chunk which was covered with a layer of fused calcium chloride. The metal obtained by this process had a density of 17.6 which on remelting in a vacuum induction furnace rose to 18.8. The melting temperature of the metal was estimated to be no greater than 1400 C. The metal was malleable, and had a silvery surface when freshly cut which rapidly tarnished, becoming black in the course of a few days.

None

This report presents the building and design philosophy of Building 234-5 at the Hanford site.