None

A preliminary design study, Phase I of the ALPR . project, has been made in accordance with the Army Reactors Branch specifications for a nuclear ''package'' power plant with a 200 to 260 kw electric and 400 kw heating capacity..The plant is to be installed at the Idaho Reactor Testing Station as a prototype for remote arctic installations. The ''conventiornl'' power plant as well as the exterior reactor components are described, and cost estimates are given. ''Nuclear'' components of the reactor are described. (auth)

This report talks about the ANCO Progress Report for month of April, 1956

This report addresses the progress report of ANP chemistry for February and March 1956.

This report addresses the analyses for fission-product antimony-125 made on samples of selected Thorex streams. The results are summarized in Table I

This report talks about APPR Meeting Held at Oak Ridge National Laboratory on April 3, 4, and 5.

A sprawling group of buildings on an impressive campus site in the Berkeley hills provides the home of the Radiation Laboratory of the University of California. A succession of large accelerators has been built there, the latest of which is the Bevatron. It is the largest and highest-energy accelerator in operation at the present time. It was built and is operated under contract with the United States Atomic Energy Commission. It is of the type known as a proton synchrotron, of which there are two others in operation, one at the University of Birmingham, England, whose energy is 1 Bev (billion electron volts), and another at the Brookhaven National Laboratory, known as the Cosmotron, which operates at 3 Bev. The Bevatron accelerates protons (stripped nuclei of hydrogen atoms) to an energy of 6.2 Bev. The design was started in 1947 under the direction of Professor E. O. Lawrence, and although it was the product of collaboration of a large group of physicists and engineers, the original conception was due to William Brobeck who also contributed more than any other individual. A working quarter-scale model was built and operated in 1948 and 1949 to verify the correctness of the design concept. …

None

None

None

None

None

This is the Chemical Development Status Report for Week Ending April 20, 1956

None

A comparison of B and Hf for use in APPR control rods shows that it is possible to substitute Hf plate. Increased wall thickness of Hf will result in a smaller water volume, but reduction of the moderating center will not decrease the effectiveness of Hf rods. Burnup of Hf results in only small change of the initial blackness. Since neutron absorption in most of the Hf isotopes are (n, gamma ) reactions there is no heat generation in Hf rod. (W.L.H.)

The consumable electrode arc melting of cold-compacted thorium powder has been developed to produce dense, clean, and soft ingots which can be hot rolled without cracking. By using a water-cooled copper crucible, contamination has been prevented and resultant ingots cleaner than the original power have been produced.

A brief description of the process is given, and details of work over a three-year period are summarized. The continuous production of Re metal by low- temperature fused salt electrolysis into a continuously circulating Hg cathcde has been demonstrated. The product is amenable to direct hot pressing or to powder preparation by distilling off the Hg. The production of pure BeCl/sub 2/ in good yield by direct chlorination of BeO has been demonstrated. The production of pure BeCl/sub 2/ in good yield by direct chlorination of beryl has been studied. The status of this work is not sufficiently advanced to permit valid conclusions as to ultimate success. The electrolytic cell and associated equipment and the chlorination equipment are described in detail. Operating procedures and representative results are given. The course for continued work is indicated. (auth)

None

Reasons for storage to allow decay of irradiated fuel elements and possible methods of storage are given. The effects on storage and inventory costs of fuel element composition plant size, element geometry, reactor type, methods of irradiation and recycle, and type of metallurgic al handling are discussed. Estimates and comparisons are included for the decay for several typical fuels. The special problems associated with thorium fuel elements are considered. (auth)

None

Niobium is determined as the peroxy complex in concentrated sulfuric acid by photometric measurement at 360 m mu . Uranium interference is cancelled by using a solution of the sample for reference in the photometric measurement. The method covers the determination of niobium in uranium --niobium alloys made from pure melting stock. Molybdenum interferes and must be removed if present. Zirconium does not interfere. The calibration curve covers a concentration range from 0.2 to 5.0 mg. (auth)

None

Data on the effects of oxidation on the compressive strength of graphite are presented. Results indicate that a rapid decrease in compressive strength in unirradiated graphite during initial oxidation, with a more gradual decrease during further oxidation. Irradiated samples exhibited greater compressive strength than non-irradiated. (J.R.D.)

None