The thermal performance and economics of the combined thermal storage pond and dry cooling tower waste heat rejection system concept for solar-thermal steam-electric plants have been evaluated. Based on the computer simulation of the operation of southwest-sited solar-thermal plants, it has been determined that the combined pond-tower concept has significant cost and performance advantages over conventional dry cooling systems. Use of a thermal storage pond as a component of the dry cooling system allows a significant reduction in the required dry cooling heat exchange capacity and the associated parasitic power consumption. Importantly, it has been concluded that the combined pond-tower dry cooling system concept can be employed to economically maintain steam condensing temperatures at levels normally achieved with conventional evaporative cooling systems. An evaluation of alternative thermal storage pond design concepts has revealed that a stratified vertical-flow cut-and-fill reservoir with conventional membrane lining and covering would yield the best overall system performance at the least cost.

Technical engineering and management support services provided for the Ocean Thermal Energy Conversion Program of the Ocean Systems Branch, Division of Central Solar Technology are briefly described. The general task areas include (1) survey, analysis, evaluation, and recommendation concerning program performance; (2) program technical monitoring; (3) development and implementation of methodology to identify and evaluate program alternatives; (4) technical assessments; (5) OTEC system integration; and (6) environment and siting considerations. (WHK)

The design, development, fabrication and testing of a shingle-type terrestrial solar cell module which produces 98 watts/m/sup 2/ of exposed module area at 1 kW/m/sup 2/ insolation and 61/sup 0/C are reported. These modules make it possible to easily incorporate photovoltaic power generation into the sloping roofs of residential or commercial buildings by simply nailing the modules to the plywood roof sheathing. This design consists of nineteen series-connected 53 mm diameter solar cells arranged in a closely packaged hexagon configuration. These cells are individually bonded to the embossed surface of a 3 mm thick thermally tempered hexagon-shaped piece of ASG SUNADEX glass. Monsanto SAFLEX polyvinyl butyral is used as the laminating adhesive. RTVII functions as the encapsulant between the underside of the glass superstrate and a rear protective sheet of 0.8 mm thick TEXTOLITE. The semi-flexible portion of each shingle module is a composite laminate construction consisting of outer layers of B.F. Goodrich FLEXSEAL and an epichlorohydrin closed cell foam core. The module design has satisfactorily survived the JPL-defined qualification testing program which includes 50 thermal cycles between -40 and +90/sup 0/C, a seven-day temperature-humidity exposure test and a mechanical integrity test consisting of a bidirectional cyclic loading at 2390 …

This report describes ANIMAL, a two-dimensional Eulerian magnetohydrodynamic computer code. ANIMAL's physical model also appears. Formulated are temporal and spatial finite-difference equations in a manner that facilitates implementation of the algorithm. Outlined are the functions of the algorithm's FORTRAN subroutines and variables.

This report discusses a computer automated stage and Scanning Electron Microscopy (SEM) system for detecting defects in glass spheres for inertial confinement laser fusion experiments. This system detects submicron defects and permits inclusion of acceptable spheres in targets after examination. The stage used to examine and manipulate the spheres through 4..pi.. steradians is described. Primary image recording is made on a roster scanning video disc. The need for SEM stability and methods of achieving it are discussed.

This semiannual report summarizes the results of physical property testing, FHSA toxicity testing and Biological Oxygen Demand (BOD) testing on five solar heat transfer fluids. The status of solar collector stagnation testing at New Mexico State University on four solar heat transfer fluids is reviewed. Cost effectiveness will be evaluated from the results of these and other tests yet to be undertaken, including stagnation performance in solar collectors. This economic evaluation will be presented in the final technical report at the conclusion of all contract tasks.

System integration, system engineering, and management support services provided for the Ocean Thermal Energy Conversion Program of the Ocean Systems Branch, Division of Central Solar Technology are described. The six tasks include (1) survey, analysis, evaluation, and recommendation concerning program performance; (2) program technical monitoring; (3) development and implementation of methodology to identify and evaluate program alternatives; (4) technical assessments; (5) OTEC system integration; and (6) environment and siting considerations. (WHK)

Progress in developing and testing a continuously variable ratio hydraulic transmission unit for automobiles is reported. Major emphasis was placed on the development of a co-axial hydrostatic module.

The resources and talents of many national and international organizations and laboratories, both governmental and industrial, are being used to establish analysis methods for predicting the embritlement condition of light water reactor (LWR) primary systems.. The exact interrelationships and responsibilites between those developing, uderstanding, combining, and apply state-of-the-art technology in dosimetry, metallurgy, and fracture mechanics for reactor systems analysis are being carefully reviewed and studied. This has resulted in a more comprehensive definition of the scope of new and updated ASTM standards required for the analysis and interpretation of LWR pressure vessel survillance results. Fifteen new and updated ASTM standards have now been identified, together with a restructuring of the main interfaces between the individual standard practices, guides, and methods. This paper briefly discusses these standards and the initial results of multi-laboratory research work involved in their validation and calibration.

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Stress corrosion cracking susceptibility of 2-1/4Cr--1Mo steel has been studied in the pH range 0.5 to 13 in one molar sulfate solutions containing Na/sub 2/S additions, by the slow strain rate (10/sup -6/S/sup -1/) technique. Brittle fracture was observed over the entire pH range but only at cathodic potentials which were below the hydrogen evolution region. Crack propagation rates (CPRs) in Nickel-200 have been measured as a function of potential in 17.5N NaOH solution at 138/sup 0/C, using the fast straining electrode technique. CPRs in the potential range -0.75 to -0.6V/sub H/ were found to be high on the order of 10/sup -8/m/s, but relatively low < 10/sup -9/ m/s, outside this potential range. Crack propagation rates of Type 304L at 138/sup 0/C in 17.5N NaOH solution with and without a chromate inhibitor have been measured as a function of potential using the fast straining electrode technique. No significant drop in the CPR was observed due to the presence of the inhibitor in the solution. Corrosion rates of pure metals Fe, Cr, and Ni have been estimated as a function of potential in the 17.5N NaOH solution at 130/sup 0/C using the long-time current decay measurements. Of the above three …