The design for a power crowbar system for ZT-40 to sustain a total current greater than 10/sup 7/ A with less than a 7% variation for 250 ..mu..s is discussed. The circuit performance without the power crowbar system is used to determine the power required. Several methods for supplying the power crowbar energy were investigated and simulated before choosing the final system. The advantages and disadvantages of the various options are also presented.

The cost of an energy storage capacitor is largely determined by the quantity of material in it. Labor cost is typically less than 25% of the total cost. A 170 F, 10 kV capacitor has been developed which presently sells for less than four cents per joule. The 10 kV rating was chosen because this is the optimum voltage for minimum cost. A development specification was written to evaluate only a single parameter such as paper thickness and a small number of capacitors were purchased and tested to destruction in a standardized 85 kJ test bank. The capacitors were then dissected to determine cause of failure. Over six different designs have been evaluated. Recently a new dielectric sandwich and a new impregnant have been evaluated with encouraging results. The details of the various designs, the test conditions and the test results will be presented.

During the first year (Phase I) of this research program, the following elements of research have been performed: (1) the collection and processing of data for pure components, (2) the evaluation of the generalized MBWR equation of state for halocarbon saturated thermodynamic properties, (3) the determination of pure component parameters for the MBWR equation for ten halocarbons, isobutane and, over a limited range, for ammonia and water, (4) the investigation of modifications of the MBWR equation for improved prediction of properties of hydrogen bonding and polar fluids. With the results of the present work, MBWR parameters have now been determined for twenty-seven pure fluids, making the use of the MBWR equation in geothermal cycle calculations feasible for most candidate working fluids. From this research, it has been concluded that the MBWR equation can be used to correlate the thermodynamic properties of many of the hydrocarbons and halocarbons which are presently potential candidate working fluids for geothermal binary cycles. However, for ammonia and water, the MBWR equation cannot accurately describe behavior in the complete range of fluid states. In anticipation of future needs to describe complex fluids (such as fluorinol-water mixtures) which have been proposed as working fluids, efforts have been …

Expressions for the fan beam and parallel beam projection and back-projection operators are given along with an evaluation of the point source response for the back-projection operators. The back-projection operator for the fan beam geometry requires the superposition of projection data measured over 360/sup 0/. Both the fan beam and parallel beam geometries have back-projection operators with point source responses which are proportional to 1/mod (r-r/sub 0/), and thus two-dimensional Fourier filter techniques can be used to reconstruct transverse sections from fan beam and parallel beam projection data. The two-dimensional Fourier filter techniques may have the speed over other methods for reconstructing fan beam data, but the reconstructed image requires four times the core storage so that the convolution result of one period does not overlap the convolution result of the succeeding period when implementing the fast Fourier transform. 10 figures.

We have obtained a large set of sediment cores from the Hudson estuary through much of the ambient salinity range. A number of core sections and samples of suspended particles have been analyzed for /sup 137/Cs, /sup 134/Cs and /sup 60/Co by direct gamma counting, and /sup 239/Pu, /sup 240/Pu, and /sup 238/Pu by alpha spectrometry. The distribution of both /sup 137/Cs and /sup 239/Pu, /sup 240/Pu indicates rapid accumulation in marginal cover areas, and especially in the harbor region adjacent to New York City. The distributions of both /sup 137/Cs and /sup 239/Pu, /sup 240/Pu are similar in surface sediments and with depth in cores, but there are deviations from the fallout ratio due to addition of reactor /sup 137/Cs and loss of /sup 137/Cs from the particle phases at higher salinities. Measureable amounts of reactor-derived /sup 134/Cs and /sup 60/Co are found in nearly all sediment samples containing appreciable /sup 137/Cs, between 15 km upstream of Indian Point and the downstream extent of our sampling, 70 km south of the reactor. Accumulations of /sup 239/Pu, /sup 240/Pu in New York harbor sediments are more than an order of magnitude greater than the fallout delivery rate. The most likely …

Annual report of the Argonne National Laboratory Radiological and Environmental Research Division regarding activities related to ecology. This report discuses programs to study the role of physical processes involved in transferring pollutants from the combustion of fossil fuels to the water surface, to study the biogeochemical behavior of transuranic elements from the Windscale reprocessing plant, and to study the effects of pollutants from power plants on aquatic organisms in the Great Lakes program.

Progress is reported in the analysis of food chain samples collected during 1974 and 1975 at the Bikini Atoll in the Marshall Islands for /sup 90/Sr, /sup 137/Cs, /sup 239/Pu, /sup 240/Pu, and /sup 241/Am remaining in the environment from the 1946-1958 nuclear tests. Data on levels of radioactivity in environmental samples and SO/sub 2/ and NO/sub x/ in air samples collected in the vicinity of Brookhaven National Laboratory during 1975 are reported. Samples of surface air, surface waters, ground water, sediments and biota from streams, soils, grass, and milk were analyzed. Abstracts of papers published during 1974 and 1975 are included. (CH)

Text describes the area, climate, agricultural history and statistics, soil-survey methods and definitions, soils and crops, land uses and agricultural methods, irrigation, and morphology and genesis of soils of Bell County, Texas.

Drawings and illustrations for the project review are presented. These are included for the 10 MW(e) solar pilot plant, the collector subsystem, the receiver subsystem, the electrical power generation system and balance of plant, plant controls and transient analysis, availability and safety, pilot and commercial plant designs, and summary and recommendations. (MHR)

Individual papers were indexed for inclusion in the data base. (LK)

Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.

Semiweekly newspaper from Tulsa, Oklahoma that includes local, state, and national news along with advertising.

Monkeys (Macaca mulatta) and dogs (beagle) were given thirteen 100-rad gamma-ray doses at 28-day intervals. The comparative response (injury and recovery) of the hematopoietic system of the two species was observed at 7-day intervals during the exposure regime. At 84 days after the thirteenth gamma-ray dose, the 1300-rad conditioned and control dogs and monkeys were challenged continuously with 35 R/day until death to determine the amount of radiation-induced injury remaining in conditioned animals as a reduction in mean survival time. Dogs (50 percent) and monkeys (8 percent) died from injury incurred during the conditioning exposures. Thus, the comparative response of dogs and monkeys to dose protraction by acute dose fractionation was similar to what might be expected from a single acute dose. Mean survival times for nonconditioned dogs and monkeys during continuous exposure at 35 R/day were the same (approximately 1400 h). Thus, hematopoietic response of the two species by this method of dose protraction was not significantly different. Mean survival times of conditioned dogs and monkeys during the continuous 35 R/day gamma-ray challenge exposure were greater than for their control counterparts. Thus, the long-term radiation-induced injury was not measurable by this method. Conditioning doses of more than four times …

The theoretical magnetic behavior of current-carrying superconducting cylinders in the presence of applied axial fields is investigated. An attempt is made to systematize the complex behavior by carefully accounting for critical current, surface pinning, and surface pitch angle, and by stressing the importance of the magnetic history of the sample. A differential equation is developed relating the thermodynamic field H(B) to the cylinder radius rho. This equation, is readily integrated numerically using a Runge-Kutta technique. The resultant flux profiles are further integrated numerically to obtain the mean magnetization of the cylinder. Careful distinction is maintained between the magnetic flux density B and the magnetic field H inside the cylinder. Results are displayed using a phase-diagrammatic technique, which shows the relative amounts of axial and azimuthal field needed to produce a given field within the cylinder, as a function of the bulk pinning strength and the surface pitch angle. In order to incorporate the magnetic history of a sample, a pair of simultaneous differential equations is developed, relating the field H and time, and the radius rho and the time, in a quasistatic manner. When simultaneously integrated, these equations yield a flux profile H(rho) which accounts for any arbitrary variations in …

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

The objective of the study was to determine, if possible, the tumorigenic agent, to determine the transmissibility of the tumors, and to investigate means of prohibiting the occurrence of such tumors.

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

Weekly newspaper from Muskogee, Oklahoma that includes local, state, and national news along with advertising.

Semiweekly newspaper from Tulsa, Oklahoma that includes local, state, and national news along with advertising.

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

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Appendix to accompany a report about aerial gamma-ray and magnetic survey maps of the Red River Area. It includes computer-generated single-record and averaged-record data listings for each of the surveyed quadrangles: Ardmore, Sherman, Abilene, and Dallas.