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EGS[underscore]Windows2: An enhanced graphical interface to EGS

Description: This report gives a general overview of the EGS[underscore]Windows2 program. The program is intended to be used to display individual particle histories of electrons, photons, and positrons generated by the EGS4 Code System. Much of this work is based on the earlier version of EGS[underscore]Windows2 from the Institute for National Measurement Standards at the National Research Council of Canada (NRCC). No attempt is made to modify their EGS subroutine WATCH, which is used to output the particl… more
Date: January 7, 1993
Creator: Chatterjee, S. (California Univ., Berkeley, CA (United States). Dept. of Electrical Engineering and Computer Science) & Donahue, R.J. (Lawrence Berkeley Lab., CA (United States))
Partner: UNT Libraries Government Documents Department
open access

Element-specific magnetic hysteresis measurements, a new application of circularly polarized soft x-rays

Description: Element-specific magnetic hysteresis measurements on heteromagnetic materials have been achieved by using circularly polarized soft-x- rays. Dramatically different Fe and Co hysteresis curves of Fe/Cu/Co trilayers were obtained by recording the magnetic circular dichroism (MCD) at their respective L{sub 3} white lines as a function of applied magnetic field. The data resolve the complicated hysteresis curves, observed by conventional magnetometry, and determine the individual magnetic moments f… more
Date: September 7, 1993
Creator: Lin, H. J.; Chen, C. T.; Meigs, G.; Idzerda, Y. U.; Chaiken, A.; Prinz, G. A. et al.
Partner: UNT Libraries Government Documents Department
open access

ARAC: A flexible real-time dose consequence assessment system

Description: Since its beginning, the Atmospheric Release Advisory Capability (ARAC), an emergency radiological dose assessment service of the US Government, has been called on to do consequence assessments for releases into the atmosphere of radionuclides and a variety of other substances. Some of the more noteworthy emergency responses have been for the Three Mile Island and Chernobyl nuclear power reactor accidents, and more recently, for a cloud of gases from a rail-car spill into the Sacramento river o… more
Date: October 7, 1993
Creator: Ellis, J. S. & Sullivan, T. J.
Partner: UNT Libraries Government Documents Department
open access

Implementation of a laboratory information management system for environmental regulatory analyses

Description: The Savannah River Technology Center created a second instance of its ORACLE based PEN LIMS to support site Environmental Restoration projects. The first instance of the database had been optimized for R&D support and did not implement rigorous sample tracking, verification, and holding times needed to support regulatory commitments. Much of the R&D instance was transferable such as the work control functions for backlog reports, work assignment sheets, and hazard communication support. A major… more
Date: September 7, 1993
Creator: Spencer, W. A.; Aiken, H. B.; Spatz, T. L.; Miles, W. F. & Griffin, J. C.
Partner: UNT Libraries Government Documents Department
open access

The new LLNL AMS sample changer

Description: The Center for Accelerator Mass Spectrometry at LLNL has installed a new 64 position AMS sample changer on our spectrometer. This new sample changer has the capability of being controlled manually by an operator or automatically by the AMS data acquisition computer. Automatic control of the sample changer by the data acquisition system is a necessary step towards unattended AMS operation in our laboratory. The sample changer uses a fiber optic shaft encoder for rough rotational indexing of the … more
Date: September 7, 1993
Creator: Roberts, M. L.; Norman, P. J.; Garibaldi, J. L. & Hornady, R. S.
Partner: UNT Libraries Government Documents Department
open access

EGS{underscore}Windows2: An enhanced graphical interface to EGS

Description: This report gives a general overview of the EGS{underscore}Windows2 program. The program is intended to be used to display individual particle histories of electrons, photons, and positrons generated by the EGS4 Code System. Much of this work is based on the earlier version of EGS{underscore}Windows2 from the Institute for National Measurement Standards at the National Research Council of Canada (NRCC). No attempt is made to modify their EGS subroutine WATCH, which is used to output the particl… more
Date: January 7, 1993
Creator: Chatterjee, S. & Donahue, R. J.
Partner: UNT Libraries Government Documents Department
open access

Average waiting time profiles of uniform DQDB model

Description: The Distributed Queue Dual Bus (DQDB) system consists of a linear arrangement of N nodes that communicate with each other using two contra-flowing buses; the nodes use an extremely simple protocol to send messages on these buses. This simple, but elegant, system has been found to be very challenging to analyze. We consider a simple and uniform abstraction of this model to highlight the fairness issues in terms of average waiting time. We introduce a new approximation method to analyze the perfo… more
Date: September 7, 1993
Creator: Rao, N. S. V.; Maly, K.; Olariu, S.; Dharanikota, S.; Zhang, L. & Game, D.
Partner: UNT Libraries Government Documents Department
open access

Examples of the use of PRA in the design process and to support modifications

Description: Many, if not most, of the world`s commercial nuclear power plants have been the subject of plant-specific probabilistic safety assessments (PSAs). A growing number of other nuclear facilities as well as other types of industrial installations have been the focus of plant-specific PSAs. Such studies have provided valuable information concerning the nature of the fisk of the individual facility and have been utilized to identify opportunities to manage that risk. This paper explores the risk mana… more
Date: September 7, 1993
Creator: Johnson, D. H.; Bley, D. C.; Lin, J. C.; Schueller, J.; van Otterloo, R. W.; Ramsey, C. T. et al.
Partner: UNT Libraries Government Documents Department
open access

MODIL cryocooler producibility demonstration project results

Description: The production of large quantities of spacecraft needed by SDIO will require a cultural change in design and production practices. Low rates production and the need for exceedingly high reliability has driven the industry to custom designed, hand crafted, and exhaustively tested satellites. These factors have mitigated against employing design and manufacturing cost reduction methods commonly used in tactical missile production. Additional challenges to achieving production efficiencies are pre… more
Date: April 7, 1993
Creator: Cruz, G. E. & Franks, R. M.
Partner: UNT Libraries Government Documents Department
open access

Laser absorption spectroscopy system for vaporization process characterization and control

Description: In support of the Lawrence Livermore National Laboratory`s (LLNL`s) Uranium Atomic Vapor Laser Isotope Separation (U-AVLIS) Program, a laser atomic absorption spectroscopy (LAS) system has been developed. This multi-laser system is capable of simultaneously measuring the line densities of {sup 238}U ground and metastable states, {sup 235}U ground and metastable states, iron, and ions at up to nine locations within the separator vessel. Supporting enrichment experiments that last over one hundre… more
Date: September 7, 1993
Creator: Galkowski, J. & Hagans, K.
Partner: UNT Libraries Government Documents Department
open access

The United States Department of Energy (DOE) Computerized Accident/Incident Reporting System (CAIRS)

Description: The Department of Energy`s (DOE) Computerized Accident/Incident Reporting System (CAIRS) is a comprehensive data base containing more than 50,000 investigation reports of injury/illness, property damage and vehicle accident cases representing safety data from 1975 to the present for more than 150 DOE contractor organizations. A special feature is that the text of each accident report is translated using a controlled dictionary and rigid sentence structure called Factor Relationship and Sequence… more
Date: June 7, 1993
Creator: Briscoe, Glen J.
Partner: UNT Libraries Government Documents Department
open access

Weak-shock reflection factors

Description: The purpose of this paper is to compare reflection factors for weak shocks from various surfaces, and to focus attention on some unsolved questions. Three different cases are considered: square-wave planar shock reflection from wedges; square-wave planar shock reflection from cylinders; and spherical blast wave reflection from a planar surface. We restrict ourselves to weak shocks. Shocks with a Mach number of M{sub O} < 1.56 in air or with an overpressure of {Delta}{sub PI} < 25 psi (1.66 bar)… more
Date: September 7, 1993
Creator: Reichenbach, H. & Kuhl, A. L.
Partner: UNT Libraries Government Documents Department
open access

The process of life-cycle cost analysis on the Fernald Environmental Management Project

Description: The Estimating Services Department of the Fernald Environmental Restoration Management Corporation (FERMCO) is formalizing the process of life-cycle cost analysis (LCCA) for the Fernald Environmental Management Project (FEMP). The LCCA process is based on the concepts, principles, and guidelines described by applicable Department of Energy`s (DOE) orders, pertinent published literature, and the National Bureau of Standards handbook 135. LCC analyses will be performed following a ten-step proces… more
Date: October 7, 1993
Creator: Chang, D. Y.; Jacoboski, J. A.; Fisher, L. A. & Beirne, P. J.
Partner: UNT Libraries Government Documents Department
open access

Investigation of cracking and erratic behavior of the uranium-titanium alloy

Description: The uranium-0.8 wt % titanium (U-0.8 Ti) alloy is often used in weapon applications where high strength and fairly good ductility are necessary. Components are immersion quenched in water from the gamma phase to produce a martensitic structure that is amenable to aging. Undesirable conditions occur when a component occasionally cracks during the quenching process, and when tensile specimens fail prematurely during mechanical testing. These two failures prompted an investigative analysis and a s… more
Date: July 7, 1993
Creator: Bird, E. L.
Partner: UNT Libraries Government Documents Department
open access

Fully coupled nonlinear thermomechanical analysis including general contact in PALM2D

Description: Fully coupled thermomechanical analysis solves the thermal problem on the deforming geometry and incorporates thermal loads into the mechanical problem. In contrast, traditional thermal stress analysis is based on an uncoupled approach in which the thermal problem is solved on a fixed geometry, and the resulting temperatures are then used to load a mechanical problem. Thermal contact, in which heat flow paths depend on the mechanical deformations of adjacent surfaces, is a major component of ma… more
Date: October 7, 1993
Creator: Engelmann, B. E. & Whirley, R. G.
Partner: UNT Libraries Government Documents Department
open access

Preparation for the Nuclear Non-Proliferation Treaty Extension Conference in 1995. Workshop summary

Description: About 30 specialists in non-proliferation participated in a workshop to explore ideas for US Government preparatory steps leading to the 1995 Nuclear Non-Proliferation Treaty (NPT) Extension Conference. To that end, workshop sessions were devoted to reviewing the lessons learned from previous Review Conferences, discussing the threats to the non-proliferation regime together with ways of preserving and strengthening it, and examining the management of international nuclear commerce. A fundament… more
Date: May 7, 1993
Creator: Chrzanowski, P. L.
Partner: UNT Libraries Government Documents Department
open access

IMAP: A complete Ion Micro-Analysis Package for the nuclear microprobe

Description: Microprobe techniques using scanned, focused MeV ions are routinely used in Livermore for materials characterization. Comprehensive data analysis with these techniques is accomplished with the computer software package IMAP, for Ion Micro-Analysis Package. IMAP consists of a set of command language procedures for data processing and quantitative spectral analysis. Deconvolution of the data is achieved by spawning sub-processes within IMAP which execute analysis codes for each specific microprob… more
Date: June 7, 1993
Creator: Antolak, A. J.; Hildner, M. L.; Morse, D. H. & Bench, G. S.
Partner: UNT Libraries Government Documents Department
open access

Advanced technologies for remote sensing imaging applications

Description: Generating and returning imagery from great distances has been generally associated with national security activities, with emphasis on reliability of system operation. (While the introduction of such capabilities was usually characterized by high levels of innovation, the evolution of such systems has followed the classical track of proliferation of ``standardized items`` expressing ever more incremental technological advances.) Recent focusing of interest on the use of remote imaging systems … more
Date: June 7, 1993
Creator: Wood, L. L.
Partner: UNT Libraries Government Documents Department
open access

Evaluation of the Atmospheric Release Advisory Capability emergency response model for explosive sources

Description: The Atmospheric Release Advisory Capability (ARAC) at the Lawrence Livermore National Laboratory (LLNL) uses a modeling system to calculate the impact of accidental radiological or toxic releases to the atmosphere anywhere in the world. Operated for the US Departments of Energy and Defense, ARAC has responded to over 60 incidents in the past 18 years, and conducts over 100 exercises each year. Explosions are one of the most common mechanisms by which toxic particulates are injected into the atm… more
Date: October 7, 1993
Creator: Baskett, R. L.; Freis, R. P. & Nasstrom, J. S.
Partner: UNT Libraries Government Documents Department
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