As titanium, zirconium, and other of the high melting electropositive metals become more important, the problem of using suitable refractory materials for their casting becomes more important. This paper discusses the method of choosing and testing possible container materials. To make the discussion more specific, titanium is used as an example. As titanium melt at 2000 {+-} 10 K, it is immediately clear that one is restricted to refractory materials melting considerably above 2000 K. This greatly limits the possible materials that might be considered. The possibility of using any pure high melting element can be quickly eliminated as titanium reacts quite vigorously with non-metals such as carbon and due to its high boiling point and therefore high internal pressure, one can predict that it dissolves even the most refractory metals. Examination of phase diagrams confirms that even metals such as tantalum, tungsten, and rhenium would not be able to resist attack by titanium. One is thus limited to high melting compounds such as the oxides, sulfides, nitrides, carbides, silicides, and borides. The first consideration is that, if possible, one would use a compound which is thermodynamically stable in the presence of titanium metal at 2000 K. Titanium should not …

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This is a progress report of the production reactors on the Hanford Reservation for the month of May 1950. This report takes each division (e.g., manufacturing, medical, accounting, occupational safety, security, reactor operations, etc.) of the site and summarizes its accomplishments and employee relations for that month.

This memorandum provides a comparison of monthly slug ruptures at the Hanford C-Pile.

This document details activities of the irradiation processing department during the month of May 1958. A general summary is included at the start of the report, after which the report is divided into the following sections: Research and Engineering Operations; Production and Reactor Operations; Facilities Engineering Operation; Employee Relations Operation; and Financial Operation.

This report consists of graphs and charts exhibited at the Chemical Development Section Deentrainment Seminar on June 2, 1950.

The May, 1956 monthly report for the Chemical Processing Department of Hanford Atomic Products Operation includes information regarding research and engineering efforts with respect to the Purex and Redox process technology. Also discussed is the production operation, finished products operation, power and general maintenance, financial operation, engineering and research operations, and employee operations. (MB)

The status of the various development programs for the Yankee Power Reactor is outlined. No data are given (For preceding period see YAEC-70.) (W.D.M)

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Preparation of synthetic wastes from the processing of aluminum-clad natural uranium, aluminum-enriched uranium alloy, zirconium-uranium, stainless steel-UO/sub 2/, and stainless steel-UO/sub 2/-MgO fuel elements is described. These preparations will be used in waste disposal studies. (auth)

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Interest in using low pH water (pH 6.5--7.3) for cooling Hanford reactors dates back to carly laboratory investigation. Work has consistently shown that the use of this low pH water should reduce overall corrosion rates of the aluminum components. Work done by Draley at the Clinton Laboratories with simulated Columbia River water showed that aluminum corrosion rates at 80 C were minimized at pH 6.5. These results were later substantiated by work at Hanford by the CMX Project. (Z) In spite of these results. the original specifications called for the process water pH to be maintained in the range 7.5--7.8. This report details the data obtained from tests on the 100-F reactor at Hanford.

This report addresses a bev high current acceleration.

It is planned for the Purex plant to be the base load plant and therefore it will not be effected by small changes in production schedules. It is of utmost importance to have adequate waste storage capacities at Purex to handle all conceivable production demands and to permit flexibility in semi-permanent storage of self-boiling wastes without jeopardizing production schedules, and diminishing safety regulations, or reducing operability. The purpose of this report is to present the design scope and the fundamental requirements for a new Purex waste storage tank farm to be designated as 241-AX.

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