Information is presented concerning the development of the SOMIX-1 computer code for sodium drop burning analysis; experimental analysis of burning sodium drops; aerosol leakage from containment buildings; high-temperature-concentration aerosols; aerosol source term from vaporized fuel; properties of high-temperature fuel mixtures; and development of the COMRADEX computer code for analysis of radiological doses in the environment from LMFBR accidents.

Population I stars of 15 M/sub mass/ and 25 M/sub mass/ have been evolved from the zero-age main sequence through iron core collapse utilizing a numerical model that incorporates both implicit hydrodynamics and a detailed treatment of nuclear reactions. The stars end their presupernova evolution as red supergiants with photospheric radii of 3.9 x 10/sup 13/ cm and 6.7 x 10/sup 13/ cm, respectively, and density structures similar to those invoked to explain Type II supernova light curves on a strictly hydrodynamic basis. Both stars are found to form substantially neutronized ''iron'' cores of 1.56 M/sub mass/ and 1.61 M/sub mass/, and central electron abundances of 0.427 and 0.439 moles/g, respectively, during hydrostatic silicon burning. Just prior to collapse, the abundances of the elements in the 25 M/sub mass/ star (excluding the neutronized iron core) have ratios strikingly close to their solar system values over the mass range from oxygen to calcium, while the 15 M/sub mass/ star is characterized by large enhancements of Ne, Mg, and Si. It is pointed out on nucleosynthetic grounds that the mass of the neutronized core must represent a lower limit to the mass of the neutron star or black hole remnant that stars …

Effort during the past quarter was directed at two specific objectives. First, the conversion of the protein production experiments from batch to continuous operation and, second, the identification of growth stimulants to increase methane yield. Early in the project, yeast production ranging from 0.5 to 5.0 grams of dry yeast per liter had been obtained in batch cultures. Highest yields were consistently attained on SSL (spent sulfite liquor) which had been ozonated for only 10 minutes. Continuous fermentation studies using three hour ozonated SSL confirmed the characteristic yields demonstrated in previous batch tests. Contamination, which occurred at residence times less than two days, appeared to decrease protein production rate and yield. Vitamins and minerals, fatty acids, and low molecular weight alcohols were investigated as possible stimulants for methane production. Only the combination of alcohol plus vitamins and minerals seemed to be effective. Stimulated production failed to achieve the 25 ml per hour rate that had randomly been exceeded many times over the past six months. Additional culture studies are planned to examine the possibility that the mixed culture, now present in the anaerobic fermenters, has degenerated slowly over the past year.

An HCl laser which uses isotopic V-V energy transfer collisions as a pumping mechanism has been demonstrated. This multiline laser, which utilized an intracavity cold gas isotope filter, increased the energy from the P/sub 1/ lines of H/sup 37/Cl while decreasng the energies of the P/sub 1/ and P/sub 2/ lines of H/sup 35/Cl. Previously unreported lines, including emission from R branch transitions, have also been observed from single-line HCl and HBr lasers.

The products of sodium-water reactions which had taken place in the Large Leak Test Rig at the Liquid Metal Engineering Center were sampled and characterized. The products consisted of the expected compounds in the Na-O-H system, and dissolved readily in ethanol. Removal of such products from a system by melting and draining does not appear feasible, but removal by dissolution in alcoholic solvents should be investigated further.

This report summarizes the results obtained from a series of petrofabric analyses of deformed and undeformed salt specimens. The specimens were originally obtained from a bedded salt mine near Lyons, Kansas where Project Salt Vault was conducted and from an operating salt mine in a domal salt formation at Jefferson Island, LA. Specimens from each site were tested in quasi-static triaxial compression and triaxial creep at RE/SPEC Inc. Subsequently, specimens which exhibited representative macroscopic deformational characteristics were selected for these fabric studies. The purpose of the petrofabric studies is to assist in developing a fundamental physical understanding of the mechanical results. Undeformed specimens were examined by optical techniques to determine preferred crystal orientations. Deformed specimens were studied by petrofabric techniques in order to characterize the deformational mechanisms. Finally, the results of the petrofabrics are compared to the mechanical data.

A methodology has been developed and implemented to allow silicon samples containing intentionally incorporated impurities to be fabricated into finished solar cells under carefully controlled conditions. The electrical and spectral properties were then measured for each group processed, and this data, along with all the material, (cells and scrap) were delivered to JPL for further analysis. All 33 lots of Group ''C'', 14 lots of Group ''CM'' and 16 lots of Group ''F'' have been fabricated into cells, tested and delivered to JPL.

The Third Workshop on Geothermal Reservoir Engineering convened at Stanford University on December 14, 1977, with 104 attendees from six nations. In keeping with the recommendations expressed by the participants at the Second Workshop, the format of the Workshop was retained, with three days of technical sessions devoted to reservoir physics, well and reservoir testing, field development, and mathematical modeling of geothermal reservoirs. The program presented 33 technical papers, summaries of which are included in these Proceedings. Although the format of the Workshop has remained constant, it is clear from a perusal of the Table of Contents that considerable advances have occurred in all phases of geothermal reservoir engineering over the past three years. Greater understanding of reservoir physics and mathematical representations of vapor-dominated and liquid-dominated reservoirs are evident; new techniques for their analysis are being developed, and significant field data from a number of newer reservoirs are analyzed. The objectives of these workshops have been to bring together researchers active in the various physical and mathematical disciplines comprising the field of geothermal reservoir engineering, to give the participants a forum for review of progress and exchange of new ideas in this rapidly developing field, and to summarize the effective …

Report on the activities of the Economic Opportunities Development Corporation from 1977-1978 for Representative Henry B. Gonzalez, from the United States General Accounting Office.