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Seabed disposal program: geochemical and sedimentological assessment of deep-sea sediments. Progess report for period, 1 January--31 December 1977

Description: Sorption experiments involving deep-sea sediments (including MPG clays) and Eu in 0.7M NaCl solutions have shown surprisingly uniform partition coefficients (Kp) of 10,000 to 70,000 for most samples at 15/sup 0/C. The concentration dependence of Kp is given by: Kp = bC/sup a/, where b depends on sediment type and temperature, C is the final solution concentration, and a, which is a constant for a given cation and sediment, ranges from about -0.6 to -1.0 for Eu. The Eu-sediment experiments yield similar results in both the sorption and desorption directions. The high values of ''a'' imply that sorption is very strong and approaches irreversibility at very low concentrations. The combined SLA and URI sorption results show that heavy elements, particularly rare earths and actinides, have similar Kp values at 1..mu..M (1000 < Kp < 100,000) and similar a values of < -0.6. Magnetic and geochemical data for MPG-I sediments show consistent core to core depositional patterns like those previously reported for the MPG-II area. The magnetic data support the ichthyolith time scale and suggest that sedimentation has not suffered major interruptions for the past 70 million years. The geochemical data show trends that parallel the sorption results, supporting the hope that we will be able to predict the sorptive behavior of sediments from more easily determined geochemical properties.
Date: March 1, 1978
Creator: Heath, G R; Epstein, G B; Leinen, M & Prince, R A
Partner: UNT Libraries Government Documents Department

Regional systems development for geothermal energy resources: Pacific region (California and Hawaii). Task I: implementation plan development, topical report

Description: Eleven implementation plans were prepared. They represent some 21 reservoir-site developments and 48 geothermal power plant developments. The plans consist of three integrated elements: (1) a bar-chart schedule that depicts interdependencies among activities and shows significant milestones on the path from initial exploration to power on-line, (2) task descriptions, and (3) the responsible performers. During the preparation of the implementation plans, the tasks required for resource development at each KGRA were defined on a generalized work breakdown structure (WBS) diagram. A generalized WBS dictionary (task descriptions) was also compiled. In addition, a specific WBS for each KGRA was prepared in a tabular and indented format. The tasks formed the basis for the schedular activities. Institutional responsibilities, based upon the WBS, were identified and are also shown on the tabular WBS. In this manner, implementation plans evolved whose schedular, task, and responsibility elements were integrated with one another. In order to provide logically consistent time estimates, and a reasonable basis for comparison, schedule modules were developed for some recurring activities which are essentially common to all KGRAs. In the preparation of multiple plant schedules for a given KGRA, the interactive effects of power development on the ancillary resources of the area were considered so that interfaces and constraining situations would be identified. Within Imperial County, this process was taken one step further to include the influence that development at the several close-lying KGRAs would have upon one another. A set of recommendations for the accelerated development of geothermal energy resources was prepared and the potential implementors were suggested.
Date: March 26, 1979
Creator: Michler, D.W.
Partner: UNT Libraries Government Documents Department

Regional Systems Development for Geothermal Energy Resources Pacific Region (California and Hawaii). Task 3: water resources evaluation. Topical report

Description: The fundamental objective of the water resources analysis was to assess the availability of surface and ground water for potential use as power plant make-up water in the major geothermal areas of California. The analysis was concentrated on identifying the major sources of surface and ground water, potential limitations on the usage of this water, and the resulting constraints on potentially developable electrical power in each geothermal resource area. Analyses were completed for 11 major geothermal areas in California: four in the Imperial Valley, Coso, Mono-Long Valley, Geysers-Calistoga, Surprise Valley, Glass Mountain, Wendel Amedee, and Lassen. One area in Hawaii, the Puna district, was also included in the analysis. The water requirements for representative types of energy conversion processes were developed using a case study approach. Cooling water requirements for each type of energy conversion process were estimated based upon a specific existing or proposed type of geothermal power plant. The make-up water requirements for each type of conversion process at each resource location were then estimated as a basis for analyzing any constraints on the megawatts which potentially could be developed.
Date: March 19, 1979
Creator: Sakaguchi, J.L.
Partner: UNT Libraries Government Documents Department

Continental shelf processes affecting the oceanography of the South Atlantic Bight. Annual report, June 1, 1976--May 31, 1977

Description: Progress is reported on studies of the influence of the Gulf Stream on water circulation and nutrient distribution in Onslow Bay off the North Carolina coast and the accumulation of hydrographic data for the South Atlantic Bight between Charleston, South Carolina, and Jacksonville, Florida. A list is included of published papers that report results of the studies in detail. (CH)
Date: March 1, 1977
Creator: Atkinson, L. P.
Partner: UNT Libraries Government Documents Department

Technical Proposal Salton Sea Geothermal Power Pilot Plant Program

Description: The proposed Salton Sea Geothermal Power Pilot Plant Program comprises two phases. The objective of Phase 1 is to develop the technology for power generation from high-temperature, high-salinity geothermal brines existing in the Salton Sea known geothermal resources area. Phase 1 work will result in the following: (a) Completion of a preliminary design and cost estimate for a pilot geothermal brine utilization facility. (b) Design and construction of an Area Resource Test Facility (ARTF) in which developmental geothermal utilization concepts can be tested and evaluated. Program efforts will be divided into four sub-programs; Power Generation, Mineral Extraction, Reservoir Production, and the Area Resources Test Facility. The Power Generation Subprogram will include testing of scale and corrosion control methods, and critical power cycle components; power cycle selection based on an optimization of technical, environmental and economic analyses of candidate cycles; preliminary design of a pilot geothermal-electric generating station to be constructed in Phase 2 of this program. The Mineral Extraction Subprogram will involve the following: selection of an optimum mineral recovery process; recommendation of a brine clean-up process for well injection enhancement; engineering, construction and operation of mineral recovery and brine clean-up facilities; analysis of facility operating results from environmental, economical and technical point-of-view; preliminary design of mineral recovery and brine clean-up facilities of sufficient size to match the planned pilot power plant. The Reservoir Production Subprogram will include monitoring the operation and maintenance of brine production, handling and injection systems which were built with private funding in phase 0, and monitoring of the brine characteristics and potential subsidence effects during well production and injection. Based on the above, recommendations and specifications will be prepared for production and injection systems necessary to serve the pilot power and mineral recovery plants planned for Phase 3. The scope of the Area Resource Test ...
Date: March 28, 1975
Partner: UNT Libraries Government Documents Department

Radiographic inspections at the Calipatria Geothermal Test Site

Description: A report is given of radiographic inspections to estimate the extent of corrosion and scale buildup at the Geothermal Test Site in Calipatria, California. Radiation exposure techniques using /sup 60/Co and /sup 192/Ir isotopes were developed. Radiography safety procedures were established. Five radiographic evaluations were made of the Geothermal Test Site from May 1976 to February 1977. Estimations of scale buildup from radiographs of operating plant pipes, valves, and tanks correlated closely with our actual scale measurements from used plant sections.
Date: March 8, 1978
Creator: Durbin, P.F.
Partner: UNT Libraries Government Documents Department