A survey has been carried out for various potential structural safety problems of superconducting fusion magnets. These areas include: (1) Stresses due to inhomogeneous temperature distributions in magnets where normal regions have been initiated. (2) Stress distributions and yield forces due to cracks and failed regions. (3) Superconducting magnet response due to seismic excitation. These analyses have been carried out using a variety of large capacity finite element computer codes that allow for the evaluation of stresses in elastic or elastic-plastic zones and around singularities in the magnet structure. Thus far, these analyses have been carried out on UWMAK-I type magnet systems. (auth)

The initial efforts of a program of research and experimental testing is described in which the optical performance of materials for use in solar energy utilization devices will be determined before and after exposure to outdoor weathering tests. Materials which are currently in use and others which are being considered or developed for these applications will be characterized and exposed to natural solar radiation. Outdoor testing will be accomplished in Phoenix (Ariz.), Miami (Fla.), and Chicago (Ill.). The results of these tests, primarily the effects of outdoor exposure on optical and physical properties, will be compiled in a handbook, along with cost, availability and other pertinent information. These data are vital to the intelligent selection of solar utilization materials, since a knowledge of the cost performance and lifetime characteristics of candidate materials will greatly assist the design of efficient and reliable solar energy utilization devices. Primary accomplishments include the definition of sample requirements, specification of test samples and test configurations, formulation of acceptance/rejection criteria and contacts with numerous potential materials suppliers.

Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.

Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.

Weekly Jewish newspaper from Fort Worth, Texas that includes local, state, and national news along with extensive advertising.

Weekly newspaper from San Antonio, Texas that includes local, state, and national news along with advertising.

Weekly newspaper from San Antonio, Texas that includes local, state, and national news along with advertising.

Weekly newspaper from San Antonio, Texas that includes local, state, and national news along with advertising.

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The success of helium cooled reactors is dependent upon the ability to prevent significant reaction between the coolant and the other components in the reactor primary circuit. Since the thermal reaction of graphite with oxidizing gases is rapid at temperatures of interest, the thermal reactions are limited primarily by the concentration of impurity gases in the helium coolant. On the other hand, the rates of radiolytic reactions in helium are shown to be independent of reactive gas concentration until that concentration reaches a very low level. Calculated steady-state concentrations of reactive species in the reactor coolant and core burnoff rates are presented for current U. S. designed, helium cooled reactors. Since precise base data are not currently available for radiolytic rates of some reactions and thermal reaction rate data are often variable, the accuracy of the predicted gas composition is being compared with the actual gas compositions measured during startup tests of the Fort Saint Vrain high temperature gas-cooled reactor. The current status of these confirmatory tests is discussed. 12 references. (auth)

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Weekly Jewish newspaper from Houston, Texas that includes local, state, and national news along with advertising.

Weekly Jewish newspaper from Houston, Texas that includes local, state, and national news along with advertising.

Sixty-six papers were presented on cycling of natural and man-made elements, including terrestrial, freshwater and marine environments, as well as current ideas on modeling. Principles governing elemental flow included radiocesium in natural environments, especially in the southeastern United States. Individual entries were made for 47 items.

Daily newspaper from Oklahoma City, Oklahoma that includes local, state, and national news along with advertising.

Daily newspaper from Oklahoma City, Oklahoma that includes local, state, and national news along with advertising.

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Daily newspaper from Oklahoma City, Oklahoma that includes local, state, and national news along with advertising.

Daily newspaper from Oklahoma City, Oklahoma that includes local, state, and national news along with advertising.

Daily newspaper from Oklahoma City, Oklahoma that includes local, state, and national news along with advertising.

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Daily newspaper from Oklahoma City, Oklahoma that includes local, state, and national news along with advertising.

Daily newspaper from Oklahoma City, Oklahoma that includes local, state, and national news along with advertising.