A method for measuring the rate of leaching of /sup 137/Cs from cement grouts was investigated as an alternate to the International Atomic Energy Agency (IAEA) method which requires long experimental times. The effects of curing time (10, 20, and 30 days) and the type of leachant (tap and saline water) on the amount of /sup 137/Cs leached were studied. Mathematical models for mass transport phenomena for both finite cylindrical geometry and a semi-infinite medium were developed to analyze the data. It was found that the models for diffusion of /sup 137/Cs with depletion of the species due to curing provided the best correlation of the data. The proposed method was found to give values of the mass transport coefficients within a factor of 2 to 10 of the IAEA test results. Diffusion coefficients were found to be in the range of 10/sup -9/ to 10/sup -11/ cm/sup 2//sec and depletion rate constants in the range of 10/sup -6/ to 10/sup -8/ sec/sup -1/.

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An x-ray fluorescence technique has been evaluated for measuring the coating thickness of two coating-substrate combinations. A quantitative theory has been developed in conjunction with the experimental data to support the results of the investigation. Results of measurements of zinc coatings on iron and nickel coatings on uranium are given. (auth)

A filler-wire feeder and positioner device is described for electron- beam welding to provide automatic features that are necessary for efficient wire feeding in a vacuum chamber. The feeder can accommodate as many as nine individual weld passes and is programmed by the use of dial switches. The positioner has three axes of movement, each of which can be controlled from the exterior of the vacuum chamber of the electron-beam welding machine. These area of movement are used to locate, precisely, the wire feed nozzle in relation to the weld joint groove and to raise or lower the nozzle between weld passes. (auth)

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In the U. S., there is a bill before the Senate that would establish emergency reserves of petroleum to sustain the country for at least 90 days. Storage of such reserves would be costly. If salt domes were leached to provide capacity for stoning petroleum for a 90-day requirement, each facility would be about 8 million dollars, pipelines another 5 million, and the cost of the oil unknown. The arrival of large tankers involves the construction of superports to accommodate them. The proposed Texas superport will include a tank farm that will cover 100 acres. The site of the proposed superport in Louisiana is in the middle of a large field of salt domes. The import situation is discussed and recommendations to alleviate the worsening situation are listed. (MCW)

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The workshop is divided into the following subjects: water quality, air quality, biological impact, hazards, environmental impact evaluation, and land use and socio-economic impact. Individual problems in each subject area are evaluated by the following criteria: probability of occurrence, seriousness of consequences, resource applicability, time urgency for new research, and researchability for new research. Recommended approaches to solution are given for each problem. Minority statements are given in some cases. (MHR)

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