This report provides test results on the thermal performance of an Owens-Illinois Sunpak liquid, evacuated tube, solar collector under simulated conditions. The test was conducted using the Marshall Space Flight Center Solar Simulator in accordance with the test requirements specified in ASHRAE 93-77 (Method of Testing to Determine the Thermal Performance of Solar Collectors) and the procedures contained in MTCP-FA-SHAC-400 (Procedure for Operation of the MSFC Solar Simulator Facility). The tests were performed on a module used on the early demonstration projects. A current production module is undergoing tests with results to be in a subsequent report.

A laboratory stainless steel reactor has been constructed and installed to study the hydrogenation of SiCl/sub 4/, 3 SiCl/sub 4/ + 2 H/sub 2/ + Si in equilibrium 4 SiHCl/sub 3/. The pressure reactor is designed to operate at pressures up to 500 psig and at temperatures up to 600/sup 0/C. After pressure and leak tests, the apparatus was started-up for the hydrogenation experiments. Temperature and flowrate measurements were calibrated. A safety review showed that the apparatus functioned smoothly and satisfactorily as designed. Experiments on the hydrogenation of SiCl/sub 4/ were carrried out during the last two weeks of September. A series of experiments on the hydrogenation of SiCl/sub 4/ was carried out at reactor pressure of 300 psig and 500 psig. Reaction temperature varies from 450/sup 0/C to 550/sup 0/C. Some preliminary reaction kinetic data and equilibrium data were collected. More hydrogenation experiments are in progress.

An existing time-dependent numerical model (OGRE) has been modified to examine the time frames associated with repressuring the formation rocks surrounding a generic nuclear waste repository following the operational period when wastes are being stored. The model is two-dimensional in the vertical plane, and assumes that the entire regime is saturated, but the repository is at one atmosphere during the operational period. For the physical and geometric parameters assumed, the results of a simulation of the time necessary to repressurize the formation after the operational period was 421.5 years. These results were in close agreement with a steady-state calculation performed by Golder Associates, Inc., in 1977. The fact that the time-dependent model results were close to the steady-state calculation resulted from the use (in the model) of a very small compressibility value, which caused the simulation to reach a steady-state condition in a relatively short time. Based on these studies, the magnitude of the system (water plus matrix) compressibility is of great importance in determining whether the time for repressurization can be determined from analytical methods or requires the use of a time-dependent numerical model.

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Mark White, regarding a legal question submitted for clarification; Compensation of an attorney who has contracted to collect delinquent taxes on behalf of Victoria County.

This report discusses the ramifications of President Jimmy Carter's production and deployment decisions of enhanced radiation weapons.