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Measurement of highly enriched uranium metal buttons with the high-level neutron coincidence counter operating in the active mode

Description: The portable High-Level Neutron Coincidence Counter is used in the active mode with the addition of AmLi neutron sources to assay the /sup 235/U content of highly enriched metal pieces or buttons. It is concluded that the portable instrument is a practical instrument for assaying uranium metal buttons with masses in the range 1.5 to 4 kg.
Date: October 1, 1980
Creator: Foley, J.E.
Partner: UNT Libraries Government Documents Department

Transportation environment data bank index

Description: In an effort to determine the environment intensities to which shipping containers will be exposed, a ''Data Bank'' of environmental information has been established by Sandia Laboratories, Division 1285 for the ERDA Division of Environmental Control Technology. This document is an index which can be used to request data of interest. (auth)
Date: February 1, 1976
Creator: Davidson, C.A. & Foley, J.T.
Partner: UNT Libraries Government Documents Department

Transportation Technical Environmental Information Center index

Description: In an effort to determine the environmental intensities to which energy materials in transit may be exposed, a ''Data Center'' of technical environmental information has been established by Sandia Laboratories, Division 5522, for the DOE Division of Environmental Control Technology. An index is presented which can be used to request data of interest.
Date: January 1, 1979
Creator: Davidson, C.A. & Foley, J.T.
Partner: UNT Libraries Government Documents Department

Transportation Technical Environmental Information Center index

Description: In an effort to determine the environmental intensities to which energy materials in transit may be exposed, a Data Center of technical environmental information has been established by Sandia National Laboratories, Division 5523, for the DOE Office of Transportation Fuel Storage. This document is an index which can be used to request data of interest. Access to the information held is not limited to Sandia personnel.
Date: June 1, 1982
Creator: Davidson, C.A. & Foley, J.T.
Partner: UNT Libraries Government Documents Department

Information display systems. Summary of project status. Report GWU-IIST-82-04

Description: In this overview paper work is presented toward developing methodologies and tools which can aid in the design and evaluation of user-computer interfaces, to impose structure on the typically very complex task of designing a user-computer interface, so the design can be divided into manageable pieces, each of which can be dealt with in a systematic, rigorous and at least partially quantitative way. This will help make user interface design more of a science and less of an art, and lead to improved design.
Date: March 1, 1982
Creator: Feldman, M. B. & Foley, J. D.
Partner: UNT Libraries Government Documents Department

The sensitivity of seismic responses to gas hydrates

Description: The primary goal of this project was to determine the sensitivity of seismic responses to gas hydrate and associated free gas saturation within marine sediments. The development of a model to predict the physical properties of sediments containing hydrates was required. This model was used as the basis for predicting the sensitivity of P and S wave seismic velocities and waveform amplitudes to variations in hydrate and free gas saturation. Secondary goals of the project included: assessment of the usefulness of seismic shear waves in characterizing hydrate saturation and a review of potential complications in seismic modeling procedures.
Date: January 1, 1992
Creator: Foley, J.E. & Burns, D.R.
Partner: UNT Libraries Government Documents Department

Application of the active well coincidence counter to the measurement of uranium

Description: An Active Well Coincidence Counter has been developed to assay uranium fuel material in field inspection applications. The unit is used to measure bulk UO/sub 2/ samples, high enrichment uranium metals, LWR fuel pellets, and /sup 233/U-Th fuel materials which have very high gamma-ray backgrounds.
Date: January 1, 1980
Creator: Menlove, H.O.; Foley, J.E. & Bosler, G.E.
Partner: UNT Libraries Government Documents Department

The sensitivity of seismic responses to gas hydrates

Description: The sensitivity of seismic reflection coefficients and amplitudes, and their variations with changing incidence angles and offsets, was determined with respect to changes in the parameters which characterize marine sediments containing gas hydrates. Using the results of studies of ice saturation effects in permafrost soils, we have introduced rheological effects of hydrate saturation. The replacement of pore fluids in highly porous and unconsolidated marine sediments with crystalline gas hydrates, increases the rigidity of the sediments, and alters the ratio of compressional/shear strength ratio. This causes Vp/Vs ratio variations which have an effect on the amplitudes of P-wave and S-wave reflections. Analysis of reflection coefficient functions has revealed that amplitudes are very sensitive to porosity estimates, and errors in the assumed model porosity can effect the estimates of hydrate saturation. Additionally, we see that the level of free gas saturation is difficult to determine. A review of the effects of free gas and hydrate saturation on shear wave arrivals indicates that far-offset P to S wave converted arrivals may provide a means of characterizing hydrate saturations. Complications in reflection coefficient and amplitude modelling can arise from gradients in hydrate saturation levels and from rough sea floor topography. An increase in hydrate saturation with depth in marine sediments causes rays to bend towards horizontal and increases the reflection incidence angles and subsequent amplitudes. This effect is strongly accentuated when the vertical separation between the source and the hydrate reflection horizon is reduced. The effect on amplitude variations with offset due to a rough sea floor was determined through finite difference wavefield modelling. Strong diffractions in the waveforms add noise to the amplitude versus offset functions.
Date: August 1, 1992
Creator: Foley, J.E. & Burns, D.R.
Partner: UNT Libraries Government Documents Department

Sandia Transportation Technical Environmental Information Center and its application to transportation risk analyses

Description: Purpose of this paper is to describe an applied research activity which is fundamental to the conduct of transportation analyses: the collection, analysis, storage, and retrieval of information on the intensities of technical environments. This paper describes the collection system which provides such a service to official researchers in transportation analysis and the applications of this information in the area of risk analysis.
Date: January 1, 1978
Creator: Foley, J.T.; Davidson, C.A. & McClure, J.D.
Partner: UNT Libraries Government Documents Department

Coincidence measurements of FFTF breeder fuel subassemblies

Description: A prototype coincidence counter developed to assay fast breeder reactor fuel was used to measure four fast-flux test facility subassemblies at the Hanford Engineering Development Laboratory in Richland, Washington. Plutonium contents in the four subassemblies ranged between 7.4 and 9.7 kg with corresponding /sup 240/Pu-effective contents between 0.9 and 1.2 kg. Large count rates were observed from the measurements, and plots of the data showed significant multiplication in the fuel. The measured data were corrected for deadtime and multiplication effects using established formulas. These corrections require accurate knowledge of the plutonium isotopics and /sup 241/Am content in the fuel. Multiplication-corrected coincidence count rates agreed with the expected count rates based on spontaneous fission-neutron emission rates. These measurements indicate that breeder fuel subassemblies with /sup 240/Pu-effective contents up to 1.2 kg can be nondestructively assayed using the shift-register electronics with the prototype counters. Measurements using the standard Los Alamos National Laboratory shift-register coincidence electronics unit can produce an assay value accurate to +-1% in 1000 s. The uncertainty results from counting statistics and deadtime-correction errors. 3 references, 8 figures, 8 tables.
Date: April 1, 1984
Creator: Eccleston, G W; Foley, J E; Krick, M; Menlove, H O; Goris, P & Ramalho, A
Partner: UNT Libraries Government Documents Department