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SOLSTEP: a computer model for predicting the thermodynamic and economic performance of solar thermal power plants

Description: A thermodynamic and economic performance analysis code, SOLSTEP, was developed to facilitate the evaluation of solar thermal power plant designs. The code conducts a time step simulation of the plant thermodynamic performance using actual recorded meteorological and insolation data. Each analysis case provides capacity factor and levelized energy cost results for several plant configurations using various combinations of collector field size and storage capacity. The code has been used to analy… more
Date: May 1, 1979
Creator: Bird, S. P.
Partner: UNT Libraries Government Documents Department
open access

Determination of in-situ thermal properties of Stripa granite from temperature measurements in the full-scale heater experiments: method and preliminary results. Technical information report No. 24

Description: The in-situ thermal conductivity and thermal diffusivity of a granite rock mass at the Stripa mine, Sweden, have been extracted from the first 70 days of temperature data for the 5 kW full-scale heater experiment by means of least-squares fit to a finite-line source solution. Thermal conductivity and thermal diffusivity have been determined to be 3.69 W/(m-/sup 0/C) and 1.84 x 10/sup -6/ m/sup 2//s, respectively, at an average rock temperature of 23/sup 0/C (the average value of the actual temp… more
Date: May 1, 1979
Creator: Jeffry, J.A.; Chan, T.; Cook, N.G.W. & Witherspoon, P.A.
Partner: UNT Libraries Government Documents Department
open access

X-ray zone plates fabricated using electron-beam and x-ray lithography

Description: Fresnel zone plate patterns, free of spherical abberation, with diameters of up to 0.63 mm and linewidths as small as 1000 A were fabricated on polyimide-membrane x-ray masks using scanning electron beam lithography Distortion of the electron beam scan raster was reduced to < 2500 A over a 2 mm x 2 mm field by applying deflection corrections, while viewing the distortion using a moire method. C/sub k/ x-ray lithography was used to replicate the zone plate pattern in thick PMMA over a 100 A thic… more
Date: May 1979
Creator: Shaver, D. C.; Flanders, D. C.; Ceglio, N. M. & Smith, H. I.
Partner: UNT Libraries Government Documents Department
open access

Decontamination methods

Description: This paper discusses decontamination methods for LWRs. Emphasis is on the chemical cleaning of primary systems and contaminated equipment and components. The equipment is composed primarily of stainless steel, Inconel, Zircaloy, and a few other materials. Variables affecting efficiency are discussed. 10 figures. (DLC)
Date: May 23, 1979
Creator: Perrigo, L. D. & Divine, J. R.
Partner: UNT Libraries Government Documents Department
open access

Effect of latent heat on frost penetration in moist soil

Description: Substantial differences have been found between measured and computed heat losses from a large in-ground thermal storage tank used for annual cycle heat storage. One suspected source of error in the computation was the neglect of the latent heat effects in the moist soil and efforts have been made to examine these. One of these effects, that was due to freezing and thawing of the soil moisture is discussed, and the results of some simulations of the effect in a numerical model are presented.
Date: May 1, 1979
Creator: Hopper, F. C. & McClenahan, J. D.
Partner: UNT Libraries Government Documents Department
open access

Spermatogonial stem cell renewal following irradiation

Description: The spermatogonial cell renewal system can maintain function and a steady level of cell population for relatively long periods of continuous low-level irradiation indicating that there does not appear to be a serious accumulation, over many generations, of damage affecting proliferation. Provided the dose-rate is quite low, there is an effective selective removal of damaged cells with almost complete repair of cellular nonlethal damage. At dose-rates greater than 2 rad/day, spermatogonia are ve… more
Date: May 1, 1979
Creator: Fabrikant, Jacob I.
Partner: UNT Libraries Government Documents Department
open access

Quark model and high-energy nuclear experiments

Description: Theoretical aspects of the measurements of production of low transverse momentum secondaries in high-energy hadron-nucleus and nucleus-nucleus collisions are discussed. Applications of the quark model to those processes are discussed in some detail. 58 references.
Date: May 1, 1979
Creator: Bialas, A.
Partner: UNT Libraries Government Documents Department
open access

Large scale copper vapor laser computer control system

Description: High power pulse copper vapor laser systems consist of a master oscillator and numerous power amplifiers. Large systems used in laser isotope separation experiments require several automatic control systems. The rapid development of compact mini computers over the past several years has enabled the implementation of sophisticated computer controlled copper vapor laser systems. Present systems provide automatic time synchronization and input power stabilization. Future systems will incorporate s… more
Date: May 15, 1979
Creator: LaChapell, M. J.; Spencer, L. W. & Coutts, G. W.
Partner: UNT Libraries Government Documents Department
open access

Status of Compton recoil gamma-ray spectroscopy

Description: The gamma-ray component of the reactor radiation field can produce effects which impact strongly upon reactor design, shielding, and safety. Radiation effects arising from the gamma-ray component are induced by interaction of the absolute gamma-ray energy spectrum in the reactor environment. Hence, the most fundamental quantity underlying effects produced by the reactor gamma-ray field is the absolute gamma-ray energy continuum. To this end, the current status of Compton recoil gamma-ray spectr… more
Date: May 1, 1979
Creator: Gold, R. & Kaiser, B. J.
Partner: UNT Libraries Government Documents Department
open access

Metabolism and biological effects of alpha-emitting radionuclides

Description: The emphasis of much of the current and planned research on the toxicity of alpha-emitting radionuclides is directed toward the complexities of actual and potential conditions of occupational environmental exposures of human beings. These, as well as the more limited studies on mechanisms of biological transport and effects, should increase our ability to predict health risks more accurately and to deal more confidently with human exposures, if and when they occur.
Date: May 1, 1979
Creator: Bair, W. J.
Partner: UNT Libraries Government Documents Department
open access

Waste isolation safety assessment program

Description: Associated with commercial nuclear power production in the United States is the generation of potentially hazardous radioactive wastes. The Department of Energy (DOE), through the National Waste Terminal Storage (NWTS) Program, is seeking to develop nuclear waste isolation systems in geologic formations that will preclude contact with the biosphere of waste radionuclides in concentrations which are sufficient to cause deleterious impact on humans or their environments. Comprehensive analyses of… more
Date: May 1, 1979
Creator: Brandstetter, A. & Harwell, M. A.
Partner: UNT Libraries Government Documents Department
open access

Perspective on relativistic nuclear collisions

Description: The importance of experiments detecting more than one particle is pointed out. The production of nuclei far from stability in peripheral collisions and the expectations for the explosive disassembly of dense nuclear matter (nuclear fireball) and some evidence for it are related. Pion interferometry concerns the measurement of correlations in the momentum and energy of two identical pions; the subject is discussed in relation to incoherent production, coherent production, partially coherent prod… more
Date: May 1, 1979
Creator: Glendenning, N.K.
Partner: UNT Libraries Government Documents Department
open access

INGEN: a general-purpose mesh generator for finite element codes

Description: INGEN is a general-purpose mesh generator for two- and three-dimensional finite element codes. The basic parts of the code are surface and three-dimensional region generators that use linear-blending interpolation formulas. These generators are based on an i, j, k index scheme that is used to number nodal points, construct elements, and develop displacement and traction boundary conditions. This code can generate truss elements (2 modal points); plane stress, plane strain, and axisymmetry two-d… more
Date: May 1, 1979
Creator: Cook, W.A.
Partner: UNT Libraries Government Documents Department
open access

Two-dimensional magnetohydrodynamic calculations for a 5 MJ plasma focus

Description: The performance of a 5 MJ plasma focus is calculated using our two-dimensional magnetohydrodynamic (2-D MHD) code. Two configurations are discussed, a solid and a hollow anode. In the case of the hollow anode, we find an instability in the current sheath which has the characteristics of the short wave length sausage instability. As the current sheath reaches the axis, the numerical solution is seen to break down. Just before this time, plasma parameters take on the characteristic values rho/rho… more
Date: May 4, 1979
Creator: Maxon, S.
Partner: UNT Libraries Government Documents Department
open access

Overview of geothermal energy in the United States

Description: The history of geothermal development is reviewed briefly. The resource is divided into three major categories for discussion: hydrothermal resources, hot igneous rock resources, and conduction-dominated resources. Geothermal power generation and direct applications in the U.S. are discussed. (MHR)
Date: May 1, 1979
Creator: Schultz, R.J. & DiBello, E.G.
Partner: UNT Libraries Government Documents Department
open access

Elastic plastic analysis of growing cracks

Description: The elastic--plastic stress and deformation fields at the tip of a crack which grows in an ideally plastic solid under plane strain, shows small scale yielding conditions. Results of an asymptotic analysis suggests the existence of a crack tip stress state similar to that of the classical Prandtl field, but containing a zone of elastic unloading between the centered fan region and the trailing constant stress plastic region. The near tip expression for the rate of opening displacement delta at … more
Date: May 1, 1979
Creator: Rice, J R; Drugan, W J & Sham, T L
Partner: UNT Libraries Government Documents Department
open access

Approach to the fracture hydrology at Stripa: preliminary results

Description: There are two main problems associated with the concept of geologic storage of radioactive waste in fractured crystalline rock: (1) the thermo-mechanical effects of the heat generated by the waste, and (2) the potential for transport of radioactive materials by the groundwater system. In both problems, fractures play a dominant role. An assessment of the hydraulic and mechanical characteristics of fractued rock requires a careful series of laboratory and field investigations. The complexity of … more
Date: May 1, 1979
Creator: Gale, J.E. & Witherspoon, P.A
Partner: UNT Libraries Government Documents Department
open access

Spontaneous fission of /sup 259/Md

Description: The mass and kinetic energy distributions of fission fragments from the spontaneous fission of th newly discovered nuclide /sup 259/Md were obtained. /sup 259/Md was identified as the E. C. daughter of /sup 259/No, and was found to decay entirely (> 95%) by spontaneous fission with a 95-min half-life. From the kinetic energies measured for 397 pairs of coincident fragments, a mass distribution was derived that is symmetric with sigma = 13 amu. /sup 259/Md, together with /sup 258/Fm and /sup 259… more
Date: May 4, 1979
Creator: Hulet, E. K.; Wild, J. F.; Lougheed, R. W.; Baisden, P. A.; Landrum, J. H.; Dougan, R. J. et al.
Partner: UNT Libraries Government Documents Department
open access

Xenon shock waves driven by high magnetic fields

Description: Magnetic fields in the range 0.2 to 2.0 MG produce shocks in 0.1 to 1.0 atmosphere xenon gas which have shock mach numbers as high as 100. Using pulsed x-ray and other diagnostics, the studies of velocity, compression, and luminosity are in good agreement with a simple snowplow theory. In some of the experiments, ultraviolet radiation from the shocked xenon produces luminous precursors and interactions with the metal walls of the shock tube. The addition of an ultraviolet absorbing organic impu… more
Date: May 1, 1979
Creator: Shearer, J.W.; Beasley, J.W.; Reyenga, A. & Steinberg, D.
Partner: UNT Libraries Government Documents Department
open access

Training for the deburring of precision miniature parts

Description: Formal training in deburring is significant because it is so rare. This lack is particularly evident when one must obtain or train individuals who can finish sophisticated parts to exacting edge requirements. The paper describes the training program developed by one large company. The program is based on the production of sophisticated precision miniature parts requiring high levels of precision and care. The format of the training program and considerations involved are described.
Date: May 1, 1979
Creator: Gillespie, L.K. & Bolinger, J.C.
Partner: UNT Libraries Government Documents Department
open access

Brightness of synchrotron radiation from electron storage rings

Description: Parameters of an electron storage ring which are relevant to brightness are defined. For the case of a FODO lattice scaling laws and maximum beam brightness are calculated.
Date: May 1, 1979
Creator: Wiedemann, H.
Partner: UNT Libraries Government Documents Department
open access

Specialized, multi-user computer facility for the high-speed, interactive processing of experimental data

Description: A proposal has been made at LBL to develop a specialized computer facility specifically designed to deal with the problems associated with the reduction and analysis of experimental data. Such a facility would provide a highly interactive, graphics-oriented, multi-user environment capable of handling relatively large data bases for each user. By conceptually separating the general problem of data analysis into two parts, cyclic batch calculations and real-time interaction, a multilevel, paralle… more
Date: May 1, 1979
Creator: Maples, C.C.
Partner: UNT Libraries Government Documents Department
open access

Oxygen-to-metal ratio control during fabrication of mixed oxide fast breeder reactor fuel pellets

Description: Oxygen-to-metal ratio (O/M) of mixed oxide fuel pellets can be controlled during fabrication by proper selection of binder (type and content) and sintering conditions. Sintering condition adjustments involved the passing of Ar--8% H/sub 2/ sintering gas across a cryostat ice bath controlled to temperatures ranging from -5 to -60/sup 0/C to control as-sintered pellet O/M ratio. As-sintered fuel pellet O/M decreased with increasing Sterotex binder and PuO/sub 2/ concentrations, increasing sinteri… more
Date: May 1, 1979
Creator: Rasmussen, D. E.; Benecke, M. W.; Jentzen, W. R. & McCord, R. B.
Partner: UNT Libraries Government Documents Department
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