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1987 Oak Ridge model conference: Proceedings

Description: A conference sponsored by the United States Department of Energy (DOE), was held on waste management. Topics included waste management, site remediation, waste minimization, economic and social aspects of waste management, and waste management training. Several case studies of US DOE facilities are included. Individual projects are processed separately for the data bases. (CBS)
Date: October 1, 1987
Item Type: Refine your search to only Article
open access

An adaptive pseudo-spectral method for reaction diffusion problems

Description: We consider the spectral interpolation error for both Chebyshev pseudo-spectral and Galerkin approximations. We develop a family of functionals I/sub r/(u), with the property that the maximum norm of the error is bounded by I/sub r/(u)/J/sup r/, where r is an integer and J is the degree of the polynomial approximation. These functionals are used in an adaptive procedure whereby the problem is dynamically transformed to minimize I/sub r/(u). The number of collocation points is then chosen to mai… more
Date: October 1, 1987
Creator: Bayliss, A.; Gottlieb, D.; Matkowsky, B.J. & Minkoff, M.
Item Type: Refine your search to only Report
open access

Agriculture-related radiation dose calculations

Description: Estimates of radiation dose to the public must be made at each stage in the identification and qualification process leading to siting a high-level nuclear waste repository. Specifically considering the ingestion pathway, this paper examines questions of reliability and adequacy of dose calculations in relation to five stages of data availability (geologic province, region, area, location, and mass balance) and three methods of calculation (population, population/food production, and food produ… more
Date: October 1, 1987
Creator: Furr, J.M.; Mayberry, J.J. & Waite, D.A.
Item Type: Refine your search to only Report
open access

Algorithms and procedures in the model based control of accelerators

Description: The overall design of a Model Based Control system was presented. The system consists of PLUG-IN MODULES, governed by a SUPERVISORY PROGRAM and communicating via SHARED DATA FILES. Models can be ladded or replaced without affecting the oveall system. There can be more then one module (algorithm) to perform the same task. The user can choose the most appropriate algorithm or can compare the results using different algorithms. Calculations, algorithms, file read and write, etc. which are used in … more
Date: October 1, 1987
Creator: Bozoki, E.
Item Type: Refine your search to only Report
open access

The Analytical Repository Source-Term (AREST) model: Description and documentation

Description: The geologic repository system consists of several components, one of which is the engineered barrier system. The engineered barrier system interfaces with natural barriers that constitute the setting of the repository. A model that simulates the releases from the engineered barrier system into the natural barriers of the geosphere, called a source-term model, is an important component of any model for assessing the overall performance of the geologic repository system. The Analytical Repositor… more
Date: October 1, 1987
Creator: Liebetrau, A. M.; Apted, M. J.; Engel, D. W.; Altenhofen, M. K.; Strachan, D. M.; Reid, C. R. et al.
Item Type: Refine your search to only Report
open access

Anomalous electron diffusion across a magnetic field in a beam-plasma system

Description: The diffusion of electrons across a magnetic field in the presence of a beam-plasma instability has been studied by means of two-dimensional numerical simulations. It is found that the beam electrons can diffuse much faster across the magnetic field than the thermal electrons. This can be explained by the fact that the electrons in the beam are in resonance with the waves excited by the beam-plasma instability so that they experience a nearly dc electric field, causing large cE x B/B/sup 2/ exc… more
Date: October 1, 1987
Creator: Okuda, H.; Ono, M. & Armstrong, R.J.
Item Type: Refine your search to only Report
open access

Application of a Multigrid Method to a Buoyancy-Induced Flow Problem

Description: The numerical prediction of buoyancy-induced flows provides special difficulties for standard numerical techniques associated with velocity-buoyancy coupling. We present a multigrid algorithm based upon a novel relaxation scheme that handles this coupling correctly. Numerical experiments have been performed that show that this approach is reasonably efficient and robust for a range of Rayleigh numbers and a variety of cycling strategies.
Date: October 1987
Creator: Thompson, C. P.; Leaf, G. K. & Vanka, S. P.
Item Type: Refine your search to only Report
open access

Application of high temperature ceramic superconductors (CSC) to commercial tokamak reactors

Description: Ceramic superconductors operating near liquid nitrogen temperature may experience higher heating rates without losing stability, compared to conventional superconductors. This will permit cable design with less stabilizer, reducing fabrication costs for large fusion magnets. Magnet performance is studied for different operating current densities in the superconductor, and cost benefits to commercial tokamak reactors are estimated. It appears that 10 kA . cm/sup -2/ (at 77 K and approx.10 T) is … more
Date: October 1, 1987
Creator: Ehst, D. A.; Kim, S.; Gohar, Y.; Turner, L.; Smith, D. L. & Mattas, R.
Item Type: Refine your search to only Report
open access

Aspects of B physics

Description: Various aspects of weak decays are commented on. Probing of the standard model and of phenomena beyond the standard model are discussed, followed by a theoretical view of B mesons and some experimental observations on B mesons. The point is made that any data on B decay would be interesting in that it would provide powerful new constraints in analyses of the standard model and extensions thereof. (LEW)
Date: October 14, 1987
Creator: Gaillard, M. K.
Item Type: Refine your search to only Article
open access

Assessment of instrumentation needs for advanced coal power plant applications: Final report

Description: The purpose of this study was to identify contaminants, identify instrumentation needs, assess available instrumentation and identify instruments that should be developed for controlling and monitoring gas streams encountered in the following power plants: Integrated Gasification Combined Cycle, Pressurized Fluidized Bed Combustion, and Gasification Molten Carbonate Fuel Cell. Emphasis was placed on hot gas cleanup system gas stream analysis, and included process control, research and environme… more
Date: October 1, 1987
Creator: Nelson, E. T.; Fischer, W. H.; Lipka, J. V.; Rutkowski, M. D. & Zaharchuk, R.
Item Type: Refine your search to only Report
open access

ATHENA radiation model

Description: The ATHENA computer program has many features that make it desirable to use as a space reactor evaluation tool. One of the missing features was a surface-to-surface thermal radiation model. A model was developed that allows any of the regular ATHENA heat slabs to radiate to any other heat slab. The view factors and surface emissivities must be specified by the user. To verify that the model was properly accounting for radiant energy transfer, two different types of test calculations were perfor… more
Date: October 1, 1987
Creator: Shumway, R.W.
Item Type: Refine your search to only Report
open access

Aurora status and plans

Description: Aurora is a short wavelength (248 nm) 10 to kJ KrF laser systems in the ICF program at Los Alamos National Laboratory. It is both an experiment in driver technology and a means for studying target performance using KrF laser light. Both features will be used to help evaluate the uv excimer laser as a viable fusion driver. The system has been designed to employ several electron-beam pumped amplifiers in series, with a final aperture of one meter square, to amplify 96 angularly mulitplexed 5 ns b… more
Date: October 1, 1987
Creator: Kristal, R.; Blair, L. S.; Burrows, M. D.; Cartwright, D. C.; Goldstone, P. D.; Greene, D. P. et al.
Item Type: Refine your search to only Article
open access

Automated saturated standard cell intercomparison

Description: A cost effective, highly efficient, and automatic method of intercomparing standard cells has been sought after and implemented, utilizing computer control and a commercially available scanner. This system reduces intercomparison time from 4 hours to 30 minutes using the standard National Bureau of Standard (NBS) 4 x 4 design. 7 figs., 1 tab.
Date: October 5, 1987
Creator: Bell, B. E. & Deitesfeld, C. A.
Item Type: Refine your search to only Report
open access

The behavior of matter under nonequilibrium conditions: Fundamental aspects and applications in energy-oriented problems: Progress report for period September 1984--November 1987

Description: This report briefly discusses progress on the following topics: state selection dynamics; polymerization under nonequilibrium conditions; inhomogeneous fluctuations in hydrodynamics and in completely mixed reactors; homoclinic bifurcations and mixed-mode oscillations; intrinsic randomness and spontaneous symmetry breaking in explosive systems; and microscopic means of irreversibility.
Date: October 7, 1987
Creator: Prigogine, I.
Item Type: Refine your search to only Report
open access

Big Bang Nucleosynthesis: Accelerator Tests and Can. Cap Omega/sub B/ Really Be Large

Description: The first collider tests of cosmological theory are now underway. The number of neutrino families in nature, N/sub nu/, plays a key role in elementary particle physics as well as in the synthesis of the light elements during the early evolution of the Universe. Standard Big Bang Nucleosynthesis argues for N/sub nu/ = 3 +- 1. Current limits on N/sub nu/ from the CERN anti pp collider and e/sup +/e/sup -/ colliders are presented and compared to the cosmological bound. Supernova SN 1987A is also s… more
Date: October 1, 1987
Creator: Schramm, D. N.
Item Type: Refine your search to only Article
open access

Bikini Atoll ionizing radiation survey, May 1985-May 1986

Description: Between 1946 and 1958, the United States conducted 23 nuclear tests at the Bikini Atoll in the Marshall Islands, which resulted in extensive radioactive contamination of a number of islands in the atoll and prevented the timely resettlement of the native population. Although the external dose rates from beta and gamma radiation have been previously determined by aerial survey and a variety of ground measurement techniques, technical constraints limited the assessment of external beta dose rates… more
Date: October 1, 1987
Creator: Shingleton, K. L.; Cate, J. L.; Trent, M. G. & Robison, W. L.
Item Type: Refine your search to only Report
open access

A borehole fluid conductivity logging method for the determination of fracture inflow parameters

Description: It is of much current interest to determine the flow characteristics of fractures intersecting a wellbore to provide data in the estimation of the hydrologic behavior of fractured rocks. The fluid inflow rates from the fractures into the wellbore are important quantities to measure. Often these inflows are at very low rates. One often finds that only a few percent of the fractures identified by core inspection and geophysical logging are water-conducting fractures, the rest being closed, clogge… more
Date: October 1, 1987
Creator: Tsang, Chin-Fu
Item Type: Refine your search to only Report
open access

Cable-in-conduit conductor optimization for fusion magnet applications

Description: Careful design of the toroidal-field (TF) and poloidal-field (PF) coils in a tokamak machine using cable-in-conduit conductors (CICC) can result in quite high overall winding-pack current densities - even with the high nuclear heat loads that may be imposed in operating a fusion reactor - and thereby help reduce the overall machine size. In our design process, we systematically examined the operational environment of a magnet, e.g., mechanical stresses, current, field, heat load, coolant temper… more
Date: October 7, 1987
Creator: Miller, J. R. & Kerns, J. A.
Item Type: Refine your search to only Article
open access

Calculated late time spectra of supernovae

Description: We consider here the nebular phase spectra of supernovae whose late time luminosity is provided by the radioactive decay of /sup 56/Ni and /sup 56/Co synthesized in the explosion. A broad variety of supernovae are known or suspected to fall in this category. This includes all SNIa and SNIb, and at least some SNII, in particular SN1987a. At sufficiently late times the expanding supernova becomes basically nebular in character due to its decreasing optical depth. The spectra produced during this … more
Date: October 30, 1987
Creator: Axelrod, T.S.
Item Type: Refine your search to only Article
open access

Calculation of source terms for NUREG-1150

Description: The source terms estimated for NUREG-1150 are generally based on the Source Term Code Package (STCP), but the actual source term calculations used in computing risk are performed by much smaller codes which are specific to each plant. This was done because the method of estimating the uncertainty in risk for NUREG-1150 requires hundreds of source term calculations for each accident sequence. This is clearly impossible with a large, detailed code like the STCP. The small plant-specific codes are… more
Date: October 1, 1987
Creator: Breeding, R. J.; Williams, D. C.; Murfin, W. B.; Amos, C. N. & Helton, J. C.
Item Type: Refine your search to only Article
open access

A CAMAC and FASTBUS Engineering Test Environment Supported by a MicroVAX/MicroVMS System

Description: A flexible, multiuser engineering test environment has been established for the engineers in SLAC's Electronic Instrumentation Engineering group. The system hardware includes a standard MicroVAX II and MicroVAX I with multiple CAMAC, FASTBUS, and GPIB instrumentation buses. The system software components include MicroVMS licenses with DECNET/SLACNET, FORTRAN, PASCAL, FORTH, and a versatile graphical display package. In addition, there are several software utilities available to facilitate FASTB… more
Date: October 1, 1987
Creator: Logg, C.A.
Item Type: Refine your search to only Article
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