At present, there are basically three different systems for converting energy in geothermal fluid into power: vapor-flashing system, total flow system, and binary system. A comparison of the power production processes was made on the basis of work output in Kwh per 1000 pounds of geothermal fluid for self flowing wells with wellhead pressure of 100 psia and for wells with downhole pumps. For simplicity, the assumptions were made that the enthalpy of the geothermal fluid in the reservoir is approximately equal to that at the wellhead, that the thermodynamic properties of geothermal fluid may be approximated by those of water, and that the pressure effects on the properties of fluid are negligible. The results showed that the performance of the two-stage vapor-flashing system is not appreciably improved by using a downhole pump. The total flow system is simple, but its success depends mainly on the development of a reliable machine with sufficiently high thermal efficiency. The regenerative isobutane system is impractical, if the geothermal fluid temperature is below 380/sup 0/F. But, when the brine temperatures range from 485 to 600/sup 0/F, the regenerative isobutane system with downhole pump exhibits superior performance as compared to two-stage vapor-flashing system, basic isobutane …

A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.

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Fusion is examined against the yardstick of fission technology with respect to inventories of radioactivity (and associated Biological Hazard Potentials), routine emissions, accident pathways and consequences, radioactive-waste management, and misuse of nuclear materials. Based on conceptual designs of Tokamak fusion reactors with stainless steel structure and tritium inventories of 10 kg per thermal gigawatt, the apparent advantage of fusion is 1 to 2 orders of magnitude in most indices of radiological hazards. Fusion's advantage is 2 to 5 orders of magnitude in comparing damage potential of intentional airborne dispersal of tritium and plutonium, and nonexistent in comparing medium-term radwaste hazard potential (1000 to 100,000 years) and intentional waterborne dispersal of tritium and plutonium. Fusion appears to have some qualitative advantages with respect to accident pathways and safeguards considerations. Fusion has the theoretical potential for improvements of 1 to 2 additional orders of magnitude in short-term BHPs and 3 orders of magnitude and more in radwaste BHPs after 10 years if vanadium-titanium alloy can be used in place of stainless steel in the reactor structure. Other important unresolved questions are how much the inventory of tritium can be reduced by ingenious design, and what fraction of a fusion reactor's activation products …

It would be very desirable if an independent method other than radiochemical measurement were available to determine the yields of low-yield events in the alluviums and tuffs of areas 2, 9, and 10 at the Nevada Test Site. The successful application of slifers to the measurement of yields from high-yield events suggests that under some conditions they may also be usable with low-yield events. This view is supported by the evidence discussed here, which is based on direct experience with slifer yield measurements for low-yield events in porous media. Suggested methods for improving slifer yield determinations and a method for determining yields independent of radiochemical measurements are offered.

The absolute sensitivities of several different types of x-ray detectors were measured between 183 eV and 932 eV. The photons in this energy range were produced by bombarding thin, water-cooled, metal targets with protons from a Cockcroft-Walton ion accelerator. The detectors measured included a silicon-semiconductor detector, two photoelectric-diode detectors employing aluminum and gold photocathodes, and three detectors incorporating plastic scintillators and photodiodes.

The sequential simplex method has been used to estimate the extent of disproportionation of tetravalent plutonium in dilute acid. A method for simulating potentiometric titrations is proposed, and this method suggests that the stoichiometric end point and the inflection point may not always correspond in the potentiometric titration of plutonium. A possible characteristic equation for the nitrite-plutonium reaction is illustrated, and the method of proportional equations is extended to the iron-plutonium reaction.

The faciliies described will provide a direct route from the 241-S-151 and 241-U-151 Diversion Boxes to the 241-SY Tanks. The 244-S Catch Station will consist of a 20,000 gallon primary tank contained within a concrete vault lined with carbon steel. Encased three-inch carbon steel process lines will be extended to the catch station pump pit from the 241-SY Tank Farm, the 241-S-151 Diversion Box and the 241-U-151 Diversion Box encasement. The facility will have its own ventilation system for exhausting the primary tank and the annulus area. A small instrument shack will house locally mounted instrumentation and controls. Existing designs for Project B-103 will be used where similarities exist (H-2-38200). The project is expected to cost $1,900,000 and require 19 months for the initiation of Title I design until construction is complete.

Evaluation of the NDA measurement results for the plutonium content of the first sixteen canisters of soil removed from the 216-Z-9 Crib Mining Facility has been completed. Results from the Soil Assay Monitor System (SAMS) were found to be biased 25 to 55 percent high in relation to the Segmented Gamma Scan Assay System (SGSAS) measurements. Within experimental error, this bias can be explained on the basis of differences in matrix density between the Los Alamos Scientific Laboratories (LASL)-prepared calibration standards and the mined soil, and to the inability of the SAMS instrument to correct for these differences. The major reason for this matrix density difference is due to the high moisture and organic content of the Z-9 surface soils when compared to the simulated standards. Correction factors have been calculated which provide for adjustment of SAMS analytical results. These factors have been used to correct the SAMS results of the original sixteen canisters, the succeeding six canisters, and remeasurements of two of the original canister group. It is recommended that derived correction factors be applied on a test basis for the remainder of the fifty canister analytical test, at which time a further evaluation will be performed. Both NDA …

The interim report is submitted for review and critique prior to preparation of a subsequent report that will complete the summary of pre-experimental turbulent design analysis. The reported work is in support of the D-Division ''Rainout'' program. Experimental facility design, diagnostics development, and concept evolution are under the guidance of General Chemistry. Preliminary analysis, results, predictions, and suggestions here are fluid dynamic considerations on the design of the turbulent attachment rate experiments. Timely publication of these current results is essential in order to meet experimental design schedules. The final LLL report will consist of these results and analyses, additions requested by the program reviewers, and an additional study emphasizing detailed turbulence structure and energy spectral considerations.

The study of a process for the low cost production of silane included laboratory investigations of the kinetics of the redistribution of dichlorosilane and trichlorosilane vapor over a tertiary amine ion exchange resin catalyst. The hydrogenation of SiCl/sub 4/ to form HSiCl/sub 3/ and the direct synthesis of H/sub 2/SiCl/sub 2/ from HCl gas and metallurigical silicon metal were also studied. The purification of SiH/sub 4/ using activated carbon adsorbent was studied along with a process for storing SiH/sub 4/ adsorbed on carbon. The latter makes possible a higher volumetric efficiency than the current practice of compressed gas storage. The mini-plant designed to produce ten pounds per day of SiH/sub 4/ is nearly complete, a detailed description of the unit and its essential design features are given.

In the first of two sections of this report, Appendix A, results of a petrophysical study performed on seven wells in the East Mesa area of the Imperial Valley of California are reported. The wells were drilled on and around the geothermal anomaly that constitutes the East Mesa Field. The study was subdivided into two tasks, the first dealing with three recently drilled wells, the second dealing with four older wells that lie off the geothermal anomaly. The three new wells are: Republic Geothermal 38-30, Republic Geothermal 16-29 and Republic Geothermal 18-28. The older wells are: Magma Sharp, Border Barbara, American Petrofina No. 27 and Texaco Grupe-Engebretson. In each case the objective of the petrophysical study was to determine porosities, permeabilities and salinities in requested intervals, together with the selection of the best sand/shale discriminator. The computed results are reported in table and listing form to show average values of porosity, horizontal and vertical permeabilities together with gross interval, net sand, percent sand and darcy-feet tabulations, layered in 250' intervals throughout each well. The second section of this report, Appendix B, is devoted to details of the drilling prognosis for the three geothermal wells to be drilled by the Bureau …

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Procurement packages of technical specifications and construction drawings for eleven test facility additions to the ERDA East Mesa Geothermal Component Test Facility are presented. Each of the specifications includes all of the technical requirements needed for procurement and construction starting with Division 2. The information is presented under the following subject headings: injection pump system: 52-2 injection pipeline; control and instrumentation spools; calibration test bench; test pad modifications; test pad piping headers; production and injection wells; well 5-2 modifications; well 8-1 down-hole pump; well 6-1 down-hole pump; and well 8-1 booster pump. (JGB)

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