518 Matching Results

Search Results

Results: 1 - 24 next
open access

COMMIX-PPC: A Three-Dimensional Transient Multicomponent Computer Program for Analyzing Performance of Power Plant Condensers, Volume 1: Equations and Numerics

Description: Report on the COMMIX-PPC computer program, designed to evaluate the thermal performance of power plant condensers. This first volume "describes in detail the basic equations, formulation, solution procedures, and models for auxiliary phenomena" (p. iv).
Date: February 1993
Creator: Chien, T. H.; Domanus, H. M. & Sha, William T.
Partner: UNT Libraries Government Documents Department
open access

Simplified Linear Equation Solvers : Users Manual

Description: The solution of large sparse systems of linear equations is at the heart of many algorithms in scientific computing. The SLES package is a set of easy-to-use yet powerful and extensible routines for solving large sparse linear systems. The design of the package allows new techniques to be used in existing applications without any source code changes in the applications.
Date: February 1993
Creator: Gropp, William & Smith, Barry
Partner: UNT Libraries Government Documents Department
open access

Pharmaceutical R&D: Costs, Risks, and Rewards

Description: This report focuses mainly on the economic side of the R&D process. Pharmaceutical R&D is an investment, and the principal characteristic of an investment is that money is spent today in the hopes of generating even more money in the future.
Date: February 1993
Creator: United States. Congress. Office of Technology Assessment.
Partner: UNT Libraries Government Documents Department
open access

Fisheries Habitat Evaluation on Tributaries of the Coeur d`Alene Indian Reservation : Annual Report [1991].

Description: The purpose of this study was to conduct physical and biological surveys of streams located on the Coeur d'Alene Indian Reservation. Surveys were designed to collect information on improving spawning habitat, rearing habitat, and access to spawning tributaries for bull trout and cutthroat trout and to evaluate the existing fish stocks. The objectives of the second year of the study were to: (1) Develop a stream ranking system to select the five streams of primary fisheries potential; (2) Conduc… more
Date: February 1, 1993
Creator: Woodward-Lillengreen, Kelly L.; Johnson, D. Chad & Scholz, Allan T.
Partner: UNT Libraries Government Documents Department
open access

ELISA-Based Segregation of Adult Spring Chinook Salmon for Control of Bacterial Kidney Disease: Annual Report 1991.

Description: Bacterial kidney disease (BKD), caused by Renibacterium salmoninarum (RS), a serious disease of salmonid fish worldwide. The disease has a major impact on spring chinook salmon populations in the Columbia River system. There is strong evidence that RS can be transmitted from parent to progeny, and segregation of progeny based on levels of antigen detected in adult fish may obviate this mode of transmission. Results are presented from the third year of a four year study to investigate segregatio… more
Date: February 1, 1993
Creator: Kaattari, Stephen L.
Partner: UNT Libraries Government Documents Department
open access

Development and testing of industrial scale, coal fired combustion system, Phase 3

Description: A major part of the work in this quarter was on the combustor tests in task 2. Three of the six planned tests in this task were completed. The first two were parametric tests of nominal one shift, (8 hour) duration on coal. Due to failure of the UV detector in the first test only several hours of coal fired operation were completed. In the second test, coal fired operation continued for the planned one shift until the 4 ton coal bin was empty. After reviewing this work with DOE, it was decided … more
Date: February 15, 1993
Creator: Zauderer, B.
Partner: UNT Libraries Government Documents Department
open access

Wood Storks of the Birdsville Colony and swamps of the Savannah River Site: General overview of research findings, 1983--1990

Description: The population of Wood Storks (Mycteria americana) that breeds in the United States has decreased from an estimated 20,000 breeding pairs in 1930 to just under 5,000 pairs in 1980. Since 1980, the number has remained relatively stable, fluctuating between 3,500 and 5,500 breeding pairs. The decline prompted the US Fish and Wildlife Service (USFWS) to list the United States population of Wood Storks as endangered in 1984. When the US Department of Energy (USDOE) decided to restart L-Reactor on t… more
Date: February 1, 1993
Creator: Coulter, M.C.
Partner: UNT Libraries Government Documents Department
open access

[Computer Science and Telecommunications Board activities]

Description: The board considers technical and policy issues pertaining to computer science, telecommunications, and associated technologies. Functions include providing a base of expertise for these fields in NRC, monitoring and promoting health of these fields, initiating studies of these fields as critical resources and sources of national economic strength, responding to requests for advice, and fostering interaction among the technologies and the other pure and applied science and technology. This docu… more
Date: February 23, 1993
Creator: Blumenthal, M. S.
Partner: UNT Libraries Government Documents Department
open access

Nuclear Spectroscopic Studies

Description: The Nuclear Physics group at the University of Tennessee, Knoxville is involved in several aspects of heavy-ion physics including both nuclear structure and reaction mechanisms. While our main emphasis is on experimental problems involving heavy-ion accelerators, we have maintained a strong collaboration with several theorists in order to best pursue the physics of our measurements. During the last year we have led several experiments at the Holifield Heavy Ion Research Facility and participate… more
Date: February 8, 1993
Creator: Bingham, C. R.; Guidry, M. W.; Riedinger, L. L. & Sorensen, S. P.
Partner: UNT Libraries Government Documents Department
open access

Development of a high-performance coal-fired power generating system with pyrolysis gas and char-fired high temperature furnace (HITAF)

Description: A concept for an advanced coal-fired combined-cycle power generating system is currently being developed. The first phase of this three-phase program consists of conducting the necessary research and development to define the system, evaluating the economic and technical feasibility of the concept, and preparing an R D plan to develop the concept further. The power generating system being developed in this project will be an improvement over current coal-fired systems. Goals have been specified… more
Date: February 1, 1993
Partner: UNT Libraries Government Documents Department
open access

High flux film and transition boiling

Description: An investigation was conducted on the potential for altering the boiling curve through effects of high velocity and high subcooling. Experiments using water and Freon-113 flowing over cylindrical electrical heaters in crossflow were made to see how velocity and subcooling affect the boiling curve, especially the film and transition boiling regions. We sought subcooling levels down to near the freezing points of these two liquids to prove the concept that the critical heat flux and the minimum h… more
Date: February 1, 1993
Creator: Witte, L.C.
Partner: UNT Libraries Government Documents Department
open access

Methods of chemical analysis for organic waste constituents in radioactive materials: A literature review

Description: Most of the waste generated during the production of defense materials at Hanford is presently stored in 177 underground tanks. Because of the many waste treatment processes used at Hanford, the operations conducted to move and consolidate the waste, and the long-term storage conditions at elevated temperatures and radiolytic conditions, little is known about most of the organic constituents in the tanks. Organics are a factor in the production of hydrogen from storage tank 101-SY and represent… more
Date: February 1, 1993
Creator: Clauss, S.A. & Bean, R.M.
Partner: UNT Libraries Government Documents Department
open access

Ion cyclotron and spin-flip emissions from fusion products in tokamaks

Description: Power emission by fusion products of tokamak plasmas in their ion cyclotron range of frequencies (ICRF) and at their spin-flip resonance frequency is calculated for some specific model fusion product velocity-space distribution functions. The background plasma of say deuterium (D) is assumed to be in equilibrium with a Maxwellian distribution both for the electrons and ions. The fusion product velocity distributions analyzed here are: (1) A monoenergetic velocity space ring distribution. (2) A … more
Date: February 1, 1993
Creator: Arunasalam, V.; Greene, G. J. & Young, K. M.
Partner: UNT Libraries Government Documents Department
open access

Analysis of Tank 241-AN-106 characterization and grout performance criteria

Description: This report provides an assessment of how well we can resolve the following issues concerning Tank 241-AN-106 at the Hanford Reservation, given the current state of information: How well we can characterize the contents of 241-AN-106; whether the degree of characterization is sufficient to use 241-AN-106 wastes to develop tests of grout adequacy. The wastes must be characterized not only to ensure grout adequacy but also to provide assurance that the wastes can be successfully and safely transf… more
Date: February 1, 1993
Creator: Liebetrau, A.M. & Anderson, C.M.
Partner: UNT Libraries Government Documents Department
open access

Transformation plasticity in ductile solids

Description: Research has addressed the role of martensitic transformation plasticity in the enhancement of toughness in high-strength austenitic steels, and the enhancement of formability in multiphase low-alloy sheet steels. In the austenitic steels, optimal processing conditions have been established to achieve a significant increase in strength level, in order to investigate the interaction of strain-induced transformation with the microvoid nucleation and shear localization mechanisms operating at ultr… more
Date: February 1, 1993
Creator: Olson, G.B.
Partner: UNT Libraries Government Documents Department
open access

[Aspects of photoionization of impurities and electron transfer in ionic crystals]

Description: Spectral evidence was found for photoionization in spectra of Eu[sup 2+] and Sm[sup 3+] in BaF[sub 2]; Ce[sup 3+] was also studied in BaF[sub 2], CaF[sub 2], and SrF[sub 2]. Two-photon spectroscopy of forbidden transitions (zero-phonon lines) was extended from NaF: Cu[sup +] to Mn[sup 4+] in Cs[sub 2]GeF[sub 6] and to MgO:Ni[sup 2+].
Date: February 10, 1993
Creator: McClure, D.S.
Partner: UNT Libraries Government Documents Department
open access

Investigation of the coherent synchrotron radiation spectrum as a probe of charge dynamics

Description: Coherent synchrotron, Cherenkov and transition radiation have generated and measured in the far infrared spectral region. This work represents the first identification and separation of the Cherenkov and transition radiation components with transition radiation producing the strongest signal. High-intensity picosecond pulses of radiation are observed for all three sources. The angular dependence in the mm wave region is not the same as that given by high-frequency radiation expressions since th… more
Date: February 1, 1993
Creator: Sievers, A.J. & Tigner, M.
Partner: UNT Libraries Government Documents Department
open access

Columbia River monitoring: Distribution of tritium in Columbia River water at the Richland Pumphouse

Description: The Surface Environmental Surveillance Project (SESP) is conducted by the Pacific Northwest Laboratory (PNL) for the US Department of Energy (DOE). This report presents the results of a special study conducted as part of the SESP to supplement the routine Columbia River monitoring program and provide information relative to the dispersion and distribution of Hanford origin contaminants entering the river through the seepage of ground water along the Hanford Site. Sampling was conducted along cr… more
Date: February 1, 1993
Creator: Dirkes, R.L.
Partner: UNT Libraries Government Documents Department
open access

Thomson scattering diagnostic analyses to determine the energetic particle distributions in TFTR

Description: The research completed and in progress for the first period of this grant is reviewed. Specific scattering scenarios for TFTR and JET and ITER were studied. The Lodestar scattering code, SKATR, was upgraded to include anisotropic energetic ion distributions and an analytic diffraction formulation was completed. Research continues on JET studies and upgrading the code for JET and ITER relevant conditions.
Date: February 12, 1993
Creator: Aamodt, R. E.; Cheung, P. & Russell, D. A.
Partner: UNT Libraries Government Documents Department
open access

COMMIX-PPC: A three-dimensional transient multicomponent computer program for analyzing performance of power plant condensers

Description: The COMMIX-PPC computer pregrain is an extended and improved version of earlier COMMIX codes and is specifically designed for evaluating the thermal performance of power plant condensers. The COMMIX codes are general-purpose computer programs for the analysis of fluid flow and heat transfer in complex Industrial systems. In COMMIX-PPC, two major features have been added to previously published COMMIX codes. One feature is the incorporation of one-dimensional equations of conservation of mass, m… more
Date: February 1, 1993
Creator: Chien, T. H.; Domanus, H. M. & Sha, W. T.
Partner: UNT Libraries Government Documents Department
open access

Collective transport of alpha particles due to Alfven wave instability

Description: Recently a new point of view has developed for describing saturation of discrete modes excited by weak sources. The method applies to the evolution of energetic particles in the beam plasma instability as well as to the description of how [alpha] particles evolve when they destabilize Alfven waves under reactor conditions. Over a wide range of parameters the system produces pulsations, where there are relativelybrief bursts of wave energy separated by longer intervals of quiescence. There are t… more
Date: February 1, 1993
Creator: Breizman, B.N.; Berk, H.L. & Ye, H.
Partner: UNT Libraries Government Documents Department
open access

[Reaction mechanism studies of heavy ion induced nuclear reactions]. [Dept. of Chemistry and Biochemistry, Univ. of Maryland, College Park, Maryland]

Description: Completed work is summarized on the topics of excitation energy division in deep-inelastic reactions and the onset of multifragmentation in La-induced reactions at E/A = 45 MeV. Magnetic fields are being calculated for the PHOBOS detector system, a two-arm multiparticle spectrometer for studying low-transverse-momentum particles produced at the Relativistic Heavy Ion Collider. The Maryland Forward Array is being developed for detection of the reaction products from very peripheral collisions; i… more
Date: February 1, 1993
Creator: Mignerey, A.C.
Partner: UNT Libraries Government Documents Department
open access

Similarity analysis applied to the design of scaled tests of hydraulic mitigation methods for Tank 241-SY-101

Description: The episodic gas releases from Tank 241-SY-101 (SY-101) pose a potential safety hazard. It is thought that gas releases occur because gases are generated and trapped in layers of settled solids located at the bottom of the tank. This document focuses on issues associated with testing of hydraulic mitigation technologies proposed for SY-101. The basic assumption underlying the concept of hydraulic mitigation is that mobilization or maintained suspension of the solids settled in the bottom of the… more
Date: February 1, 1993
Creator: Liljegren, L.M.
Partner: UNT Libraries Government Documents Department
open access

APS high heat load monochromator

Description: This document contains the design specifications of the APS high heat load (HHL) monochromator and associated accessories as of February 1993. It should be noted that work is continuing on many parts of the monochromator including the mechanical design, crystal cooling designs, etc. Where appropriate, we have tried to add supporting documentation, references to published papers, and calculations from which we based our decisions. The underlying philosophy behind performance specifications of th… more
Date: February 1, 1993
Creator: Lee, W. K. & Mills, D.
Partner: UNT Libraries Government Documents Department
Back to Top of Screen