96 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "Calculation Methods"  
Results: 1 - 24 next
open access

NORTH PORTAL - SANITARY SEWER CALCULATION - CHANGE HOUSE FACILITY #5008

Description: The purpose of this design calculation is to determine the demand on the waste system and to size the three main sanitary sewer lines serving the Change House Facility No.5008, in accordance with the Uniform Plumbing Code (Section 4.4.1) and U.S. Department of Energy Order 6430.1A-1540 (Section 4.4.2).
Date: January 25, 1996
Creator: Blackstone, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Comparison of Methodologies for Assessing the Risks From Nuclear Weapons and From Nuclear Reactors

Description: There are important differences between the safety principles for nuclear weapons and for nuclear reactors. For example, a principal concern for nuclear weapons is to prevent electrical energy from reaching the nuclear package during accidents produced by crashes, fires, and other hazards, whereas the foremost concern for nuclear reactors is to maintain coolant around the core in the event of certain system failures. Not surprisingly, new methods have had to be developed to assess the risk from… more
Date: August 1, 1996
Creator: Benjamin, A. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

NORTH PORTAL-WATER HEATER CALCULATION-SHOP BUILDING #5006

Description: The purpose of this design analysis and calculation is to determine the demand for hot and the selection of a water heater of appropriate size, in accordance with the Uniform Plumbing Code (Section 4.4.1) and U.S. Department of Energy Order 6430.1A-1540 (Section 4.4.2).
Date: January 25, 1996
Creator: Blackstone, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

An experimental evaluation of the instrumented flux synthesis method for the real-time estimation of reactivity. Final report

Description: One method of determining the flux density is flux synthesis which approximates the flux in the core by linear combinations of precomputed shape functions. In traditional flux synthesis, the unknown mixing coefficients are determined using a weighted residual method of solving the diffusion equation. In the instrumented synthesis method, the mixing coefficients are determined using count rates from neutron detectors in the core. In this way the mixing coefficients are linked to conditions in th… more
Date: January 1, 1996
Creator: Hughes, Jeffrey C.; Henry, Allan F.; Lanning, David D. & Bernard, John A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Unitarity-based techniques for one-loop calculations in QCD

Description: Perturbative QCD, and jet physics in particular, have matured sufficiently that rather than being merely subjects of experimental studies, they are now tools in the search for new physics. This role can be seen in the search for the top quark, as well as in recent speculations about the implications of supposed high-E{sub T} deviations of the inclusive-jet differential cross section at the Tevatron. One of the important challenges to both theorists and experimenters in coming years will be to h… more
Date: June 1, 1996
Creator: Bern, Z.; Dixon, L. & Kosower, D.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A quantum mechanical investigation of positively charged defects in SiO{sub 2} thin film devices

Description: Ab initio Hartree-Fock and second-order Moeller-Plesset theory calculations have been performed to investigate the stability of triply-coordinated O{sup +} centers in the Si-O-Si network of amorphous SiO{sub 2}. The calculations reveal that the H{sup +} ion binds with a bridging O center to form a very stable (D{sub e} > 6 eV) trivalent O complex. Capture of an electron by the positively charged protonated complex, however, is predicted to immediately lead to the dissociation of the O-H bond. A… more
Date: December 31, 1996
Creator: Ferreira, A.M.; Karna, S.P. & Brothers, C.P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Immersed interface methods. Final report

Description: Cartesian grid methods encompass a wide variety of techniques used to solve partial differential equations in more than one space dimension on uniform Cartesian grids even when the underlying geometry is complex and not aligned with the grid. The authors` groups work on Immersed Interface Methods (IIM) was originally motivated by the desire to understand and improve the ``Immersed Boundary Method``, developed by Charles Peskin to solve incompressible Navier-Stokes equations in complicated geome… more
Date: November 1, 1996
Creator: LeVeque, Randall J.; Adams, Loyce M. & Bube, Kenneth P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Organic emission calculations for the 242-A evaporator vessel vent system

Description: This document contains historical calculations originally published in the 242-A Evaporator Dangerous Waste Permit Application, DOE/RL-90-42, Rev 0. They are being released as a supporting document, along with brief explanatory information, to be used as a reference in Rev 1 of the permit application and in other supporting documents, such as the 242-A Evaporator Data Quality Objectives.
Date: June 20, 1996
Creator: Bowman, M.R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Radiological dose assessment of Department of Energy Pinellas Plant waste proposed for disposal at Laidlaw Environmental Services of South Carolina, Inc.

Description: The U.S. Department of Energy (DOE) Pinellas Plant in Largo, FL is proposing to ship and dispose of hazardous sludge, listed as F006 waste, to the Laidlaw Environmental Services of South Carolina, Inc. (Laidlaw) treatment, storage, and disposal facility in Pinewood, South Carolina. This sludge contains radioactive tritium in concentrations of about 28 pCi/g. The objective of this study is to assess the possible radiological impact to workers at the Laidlaw facility and members of the public due… more
Date: May 1, 1996
Creator: Socolof, M.L. & Lee, D.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Prototype demonstration of radiation therapy planning code system

Description: This is the final report of a one-year, Laboratory-Directed Research and Development project at the Los Alamos National Laboratory (LANL). Radiation therapy planning is the process by which a radiation oncologist plans a treatment protocol for a patient preparing to undergo radiation therapy. The objective is to develop a protocol that delivers sufficient radiation dose to the entire tumor volume, while minimizing dose to healthy tissue. Radiation therapy planning, as currently practiced in the… more
Date: September 1, 1996
Creator: Little, R. C.; Adams, K. J.; Estes, G. P.; Hughes III, L. S. & Waters, L. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Phase diagram of imperfect ferromagnetic/antiferromagnetic-bilayers

Description: The phase diagram for ferromagnetic/antiferromagnetic bilayers with imperfect interfaces is calculated, using a Ising spin-1/2 model which is solved numerically in the mean field approximation for finite temperatures. We identify 3 stable phases: domains in the ferromagnet, domains in the antiferromagnet, and domain walls near the interfaces with homogeneous order within the layers. Phase transitions between these phases occur as a function of temperature, relative film thicknesses, and step de… more
Date: October 1, 1996
Creator: Berger, A. & Fullerton, E.E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Electronic structure and phase equilibria in ternary substitutional alloys

Description: A reliable, consistent scheme to study phase equilibria in ternary substitutional alloys based on the tight-binding approximation is presented. With electronic parameters from linear muffin-tin orbital calculations, the computed density of states and band structures compare well with those from more accurate {ital ab}{ital initio} calculations. Disordered alloys are studied within the tight-binding coherent-potential approximation extended to alloys; energetics of ordered systems are obtained t… more
Date: April 26, 1996
Creator: Traiber, Ariel J. S.; Allen, S. M.; Turchi, P. E. A. & Waterstrat, R. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Application of Simple Numerical Techniques for Increasing the Efficiency of a Forward-In-Time Shallow Water Code on a Sphere

Description: Atmospheric motions contain signals such as gravity waves and/or sound waves which usually have little influence on the actual weather. These signals do however have an effect on atmospheric models which predict the weather; the signals require the use of small time steps for numerical stability. Two explicit numerical techniques, time-splitting and temporal averaging, are described in this paper which help increase the efficiency of atmospheric models which contain fast signals. An interesting… more
Date: September 1, 1996
Creator: Reisner, J.M. & Kao, C.Y.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A Spectral Function Method Applied to the Calculation of the Wake Function for the NLCTA

Description: The equivalent circuit representation of the dipole modes of the SLAC damped detuned structure (DDS) which is being fabricated at LAC has been analyzed by three different methods. The first two are based upon a modal analysis: in the first, damped modes are found by a first order perturbation in the cell to damping manifold coupling strength; while in the second, preferred when the coupling strength is large (as is the case for the SLAC structure) they are determined exactly (a time consuming p… more
Date: September 1, 1996
Creator: Jones, R. M.; Kroll, N. M.; Ko, K. & Miller, R. H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Using BRDFs for accurate albedo calculations and adjacency effect corrections

Description: In this paper the authors discuss two uses of BRDFs in remote sensing: (1) in determining the clear sky top of the atmosphere (TOA) albedo, (2) in quantifying the effect of the BRDF on the adjacency point-spread function and on atmospheric corrections. The TOA spectral albedo is an important parameter retrieved by the Multi-angle Imaging Spectro-Radiometer (MISR). Its accuracy depends mainly on how well one can model the surface BRDF for many different situations. The authors present results fr… more
Date: September 1, 1996
Creator: Borel, C.C. & Gerstl, S.A.W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Analytical expressions for maximum wind turbine average power in a Rayleigh wind regime

Description: Average or expectation values for annual power of a wind turbine in a Rayleigh wind regime are calculated and plotted as a function of cut-out wind speed. This wind speed is expressed in multiples of the annual average wind speed at the turbine installation site. To provide a common basis for comparison of all real and imagined turbines, the Rayleigh-Betz wind machine is postulated. This machine is an ideal wind machine operating with the ideal Betz power coefficient of 0.593 in a Rayleigh prob… more
Date: December 1, 1996
Creator: Carlin, P. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Risk-based versus deterministic explosives safety criteria

Description: The Department of Defense Explosives Safety Board (DDESB) is actively considering ways to apply risk-based approaches in its decision- making processes. As such, an understanding of the impact of converting to risk-based criteria is required. The objectives of this project are to examine the benefits and drawbacks of risk-based criteria and to define the impact of converting from deterministic to risk-based criteria. Conclusions will be couched in terms that allow meaningful comparisons of dete… more
Date: December 1, 1996
Creator: Wright, R.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Lattice relaxation and the stability of plutonium-based alloys and intermetallics

Description: The topic of this study is the electronic structure of the compounds Pu{sub 3}X [X = In, Ga, Al, or Tl], reported to have room temperature L1{sub 2} structures. The measured Pu-Pu bond length in {delta}-phase Pu is 3.28 {Angstrom}. The Pu-Pu bond lengths in Pu{sub 3}Ga and Pu{sub 3}Al are 3.18 {Angstrom}. The similarity in bonding in Pu{sub 3}Ga and Pu{sub 3}Al is especially notable as the equilibrium atomic volume in Ga is 18% higher than that of Al. Likewise, in Pu{sub 3}In and Pu{sub 3}Tl th… more
Date: December 1, 1996
Creator: Becker, J. D.; Cox, L.; Wills, J. M. & Cooper, B. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Scale-4 analysis of pressurized water reactor critical configurations: Volume 5, North Anna Unit 1 Cycle 5

Description: ANSI/ANS 8.1 requires that calculational methods for away-from- reactor (AFR) criticality safety analyses be validated against experiment. This report summarizes part of the ongoing effort to benchmark AFR criticality analysis methods using selected critical configurations from commercial PWRs. Codes and data in the SCALE-4 code system were used. This volume documents the SCALE system analysis of one reactor critical configuration for North Anna Unit 1 Cycle 5. The KENO V.a criticality calculat… more
Date: October 1, 1996
Creator: Bowman, S.M. & Suto, T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Optimization and nonlinear solver experiences in high-intensity rf ion linac problems

Description: Optimization techniques and nonlinear equation solvers have long been used as tools for advanced problems in high-intensity rf ion linacs. It is expected that the use of these tools will increase dramatically in the future, as computer software and hardware facilitates their development and use. Three such problems are discussed: development of an rf field tuning method to work around a systematic error in the LAMPF linac, investigation of this tuning method to identify why it does not always c… more
Date: October 1, 1996
Creator: Jameson, Robert A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Route characterization for risk assessment of highway transport of nuclear materials

Description: A procedure is presented for developing the route characterization used to assess the risk for the highway transport of nuclear materials. The types of data needed for a risk assessment and the sources used to provide that data are discussed. An outline of the methods used to get from data source to the route characterization used for risk analysis is presented. The models and methodologies developed for this study were programmed into the ADROIT computer code, which ha become one of Sandia`s p… more
Date: October 1, 1996
Creator: Sagartz, M.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Oak Ridge National Laboratory Embrittlement Data Base (EDB) and Dosimetry Evaluation (DE) program

Description: The objective of this program is to develop, maintain, and upgrade computerized data bases, calculational procedures, and standards relating to reactor pressure vessel fluence spectra determinations and embrittlement assessments. As part of this program, the information from radiation embrittlement research on nuclear reactor pressure vessel steels and from power reactor surveillance reports is maintained in a data base published on a periodic basis. The Embrittlement Data Base (EDB) effort con… more
Date: September 1, 1996
Creator: Pace, J. V. III; Remec, I.; Wang, J. A. & White, J. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Detection of the large meteoroid/NEO flux using infrasound: Recent detection of the November 21, 1995 Colorado fireball

Description: During the early morning of November 21, 1995, a fireball as bright as the full moon entered the atmosphere over southeastern Colorado and subsequently produced audible sonic boom reports from Texas to Wyoming. The event was detected locally by a security video camera which showed the reflection of the fireball event on the hood of a truck. The camera also recorded tree shadows cast by the light of the fireball. This recording includes the audio signal of a strong double boom as well. Subsequen… more
Date: August 1, 1996
Creator: ReVelle, D. O. & Whitaker, R. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
Back to Top of Screen