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Elastic-wave radiation from spherical sources

Description: The radiation of spherical compressional waves from a spherical cavity in an ideal elastic solid is treated. The equations for the radiation source and field are written in terms of the reduced-displacement potential. The source equation is studied in terms of characteristic frequencies, corresponding periods and wavelengths, and damping. The field equations for the stresses, strains, radial displacement, etc., are reviewed with regard to the transitions between the near and far fields. The nat… more
Date: December 7, 1979
Creator: Rodean, H.C.
Partner: UNT Libraries Government Documents Department
open access

NUTRAN: a computer model of long-term hazards from waste repositories

Description: The NUTRAN package of computer programs calculates doses to humans from radioactivity carried out of deep geologic waste repositories by groundwater. It consists of four codes: ORIGEN (developed by Oak Ridge National Laboratory), which treats the formation and decay of radionuclides, WASTE, which computes the transport of radionuclides in ground water, BIODOSE, which calculates radionuclide transport in surface waters and ecosystems and human exposures, and WPPLOT, which combines the results of… more
Date: December 7, 1979
Creator: Ross, B.; Koplik, C.M.; Giuffre, M.S.; Hodgin, S.P. & Duffy, J.J.
Partner: UNT Libraries Government Documents Department
open access

High temperature science: future needs and anticipated development in high-density shock-wave research

Description: Shock-wave experiments on condensed matter currently achieve pressures up to 5 Mbar, and temperatures over 20,000/sup 0/K. In this report we survey a number of experimental methods that, in the next decade, may increase the conditions by an order of magnitude. These advanced experiments will allow us to investigate a new range of physics problems.
Date: March 7, 1979
Creator: Ross, M.; Ahrens, T. J. & Nellis, W. J.
Partner: UNT Libraries Government Documents Department
open access

Groundwater recharge and discharge scenarios for a nuclear waste repository in bedded salt

Description: Twelve potential scenarios have been identified whereby groundwater may enter or exit a nuclear waste repository in bedded salt. The 12 scenarios may be grouped into 4 categories or failure modes: dissolution, fracturing, voids, and penetration. Dissolution modes include breccia pipe and breccia blanket formation, and dissolution around boreholes. Fracture modes include flow through preexisting or new fractures and the effects of facies changes. Voids include interstitial voids (pores) and flui… more
Date: March 7, 1979
Creator: Carpenter, D.W.; Steinborn, T.L. & Thorson, L.D.
Partner: UNT Libraries Government Documents Department
open access

Determination of performance criteria for high-level solidified nuclear waste

Description: To minimize radiological risk from the operation of a waste management system, performance limits on volatilization, particulate dispersion, and dissolution characteristics of solidified high level waste must be specified. The results show clearly that the pre-emplacement environs are more limiting in establishing the waste form performance criteria than the post-emplacement environs. Absolute values of expected risk are very sensitive to modeling assumptions. The transportation and interim sto… more
Date: May 7, 1979
Creator: Heckman, R.A. & Holdsworth, T.
Partner: UNT Libraries Government Documents Department
open access

Thick-target neutron and. gamma. -ray yields induced by medium-energy proton and deuteron bombardments

Description: Stopping samples of Lucite, Al, Fe, and /sup 238/U (Fe, and /sup 238/U) were irradiated with 330 MeV deuterons (260 MeV protons). For each target, neutron energy spectra and prompt ..gamma..-ray yields were measured using the time-of-flight technique. The detector was a right cylindrical volume of deuterated benzene, 12.5-cm diameter x 7.5-cm long, located at 110/sup 0/ to the incident beam direction. The neutron yield and the prompt ..gamma..-ray yield were found to depend upon the atomic numb… more
Date: March 7, 1979
Creator: Becker, J. A.; Howe, R. E.; Crase, K. W. & Farley, E.
Partner: UNT Libraries Government Documents Department
open access

Investigation of solar cells based on Cu/sub 2/O. Quarterly progress report, May 1-July 31, 1979

Description: Efforts during this quarter have involved a detailed study of photocurrent from Cu/Cu/sub 2/O Schottky barriers, development of a MBE system, and studies of reactively sputtered ZnO films. Optical constants were determined for Cu films as a function of film thickness and utilized to determine optimum AR coating thicknesses to maximize the photocurrent from Cu/Cu/sub 2/O cells. Using results of these analyses, an AM1 photocurrent of 7.4 mA/cm/sup 2/ has been obtained. Fabrication and purchasing … more
Date: September 7, 1979
Creator: Olsen, L. C.
Partner: UNT Libraries Government Documents Department
open access

Site suitability criteria for solidified high level waste repositories

Description: Activities devoted to development of regulations, criteria, and standards for storage of solidified high-level radioactive wastes are reported. The work is summarized in sections on site suitability regulations, risk calculations, geological models, aquifer models, human usage model, climatology model, and repository characteristics. Proposed additional analytical work is also summarized. (JRD)
Date: March 7, 1979
Creator: Heckman, Richard A.; Holdsworth, Thomas & Towse, Donald F.
Partner: UNT Libraries Government Documents Department
open access

Fabrication and testing of TAA bonded carbon electrodes. Quarterly technical progress report No. 4, December 1, 1978-February 28, 1979

Description: A number of platinum-catalyzed cathodes have been tested in the ECO fuel cell; they have been shown to have reproducible activity which is a function of cathode thickness: improved performance with increased thickness. Preliminary data on bonded cobalt dibenzotetraazaannulene (CoTAA) catalyzed cathodes have been obtained showing them to be as active as similarly loaded (by weight) platinum-catalyzed cathodes.
Date: March 7, 1979
Creator: Walsh, F.
Partner: UNT Libraries Government Documents Department
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