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High-temperature borate liquids: physical properties of glass-forming compositions

Description: Several experimental routes can be used to develop a better understanding of the polymeric constitution (polyanionic and/or polyhedral distribution) of borate, germanate, and silicate glasses. Spectral, chemical, physical-chemical, and mechanical property information can be determined directly for the glass compositions of interest. Generally, only physical-chemical information is readily accessible for the corresponding high temperature liquids. It will be shown that information on each state … more
Date: May 6, 1977
Creator: Riebling, E.F.
Partner: UNT Libraries Government Documents Department
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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
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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
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Preliminary design and analysis of recovery of lithium from brine with the use of a selective extractant

Description: Lithium requirements for battery and controlled thermonuclear fusion reactor uses in the next few decades may exceed the current availability of the mineral and brine reserves. It is thus prudent to search for new reserves and resources to satisfy these and other lithium applications in the future. It has been reported that the lithium content of Smackover oilfield waters ranges in order of 100--500 mg/l, and thus could represent a substantial reserve. A method is proposed to extract lithium fr… more
Date: May 1, 1977
Creator: Dang, V.D. & Steinberg, M.
Partner: UNT Libraries Government Documents Department
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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
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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
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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
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