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Information is presented concerning the extent to which vibratory motions at the subsurface foundation level might differ from motions at the ground surface and the effects of the various subsurface materials on the overall Clinch River Breeder Reactor site response; seismic analyses of LMFBR type reactors to establish analytical procedures for predicting structure stresses and deformations; and aspects of the current technology regarding the representation of energy losses in nuclear power plants as equivalent viscous damping.

This report, which is part of a study initiated by the NATO Committee on the Challenges of Modern Society (CCMS), describes the current status of nonelectrical uses of geothermal resources. Such resources are defined as geothermal fluids between the temperatures of 50 and 160/sup 0/C. Current and potential uses of these resources including residential and commercial, agricultural and industrial applications are described. Also discussed are exploration and drilling; extraction and distribution; environmental impact; and economic and regulatory problems. Applications in a number of countries are described. Among the report's conclusions are: (1) Geothermal resources are widely distributed throughout the world. (2) The extraction of these resources presents no serious technical problems. (3) A wide variety of economically viable applications for these resources currently exists. (4) Current nonelectrical applications have a favorable economic structure compared with those of other energy sources. (5) Disposal of spent fluids has a significant ecological impact. Reinjection appears to be the most likely alternative. (6) The legal and institutional framework surrounding these applications needs both clarification and simplification.

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An experiment investigating high multiplicity gamma-ray events in a region covering 18 percent of 4..pi.. around 90/sup 0/ in the center of mass was performed at the CERN ISR by sharing the detector of the CERN-Columbia-Rockefeller group. Information on the dependence of the cross section on gamma-ray multiplicity as well as the dependence of the average gamma-ray and charge multiplicities on the center-of-mass energy was obtained. Studies were made of correlations between the number of gamma-rays and charged particles, as well as between the total number of gamma-rays plus charged particles and the total measured energy per event. Two-body inclusive rapidity distributions in the rapidity interval 0.86 to -0.86 covered by the detector are also presented. The main corrections to the data, as well as considerations of background effects, are extensively discussed. Also discussed are a Monte Carlo calculation of the gamma-ray multiplicity distribution expected from ..pi../sup 0/ decay and a calculation based upon an independent emission model of ..pi../sup 0/ production. Both calculations give identical results, which are found to be several orders of magnitude lower than the experimental results for gamma multiplicities greater than or equal to 10. (auth)

The Nation has embarked on an aggressive program to develop its indigenous resources of geothermal energy. For more than a decade, geothermal energy has been heralded as one of the more promising forms of energy alternate to oil and gas for electric power generation, but during the last fifteen years, the total capacity in the U.S. has reached 502 MWe, about half the size of a single modern nuclear power plant. And yet, the United States, especially its western and Gulf coast states, is believed to possess a vast resource base of geothermal heat at depths up to 3 to 10 km. Many estimates of these potential resources suitable for the production of electric power have been published and they range over a spectrum of more than a factor of 100. This variation suggests that the potential is essentially unknown. Table 1 gives a range of published forecasts for the year 1985 and the equivalent potential in number of 1000 Mwe power plants and in oil consumption in millions of barrels per day. In view of the estimated construction of about 200 to 250 nuclear power reactors by 1985-90, the pessimistic forecasts clearly show that the contribution of geothermal energy …

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