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The LCLS X-Ray FEL at SLAC

Description: The design status and R and D plan of a 1.5 Angstrom SASE-FEL at SLAC, called the Linac Coherent Light Source (LCLS), are described. The LCLS utilizes one third of the SLAC linac for the acceleration of electrons to about 15 GeV. The FEL radiation is produced in a long undulator and is directed to an experimental area for its utilization. The LCLS is designed to produce 300 fsec long radiation pulses at the wavelength of 1.5 Angstrom with 9 GW peak power. This radiation has much higher brightne… more
Date: February 9, 1999
Creator: Cornacchia, Massimo
Partner: UNT Libraries Government Documents Department
open access

Bond Strength of Cementitious Borehole Plugs in Welded Tuff

Description: Axial loads on plugs or seals in an underground repository due to gas, water pressures and temperature changes induced subsequent to waste and plug emplacement lead to shear stresses at the plug/rock contact. Therefore, the bond between the plug and rock is a critical element for the design and effectiveness of plugs in boreholes, shafts or tunnels. This study includes a systematic investigation of the bond strength of cementitious borehole plugs in welded tuff. Analytical and numerical analysi… more
Date: February 1, 1991
Creator: Akgun, H. & Daemen, J. J. K.
Partner: UNT Libraries Government Documents Department
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Task 3.14 - Demonstration of Technologies for Remote Power Generation in Alaska

Description: In over 165 villages in Alaska, the use of fossil fuel supplies or renewable energy resources could greatly reduce the cost of electricity and space heating. Currently, diesel generators are the most commonly used electrical generating systems; however, high fuel costs result in extremely high electrical power costs reIative to the lower 48 states. The reduction of fuel costs associated with the use of indigenous, locally available fuels running modular, high-efficiency power- generating system… more
Date: February 1, 1998
Creator: Jones, Michael L.
Partner: UNT Libraries Government Documents Department
open access

Environmental Control Technology

Description: Operations and maintenance continued this month at the Electric Power Research Institute's (EPRI's) Environmental Control Technology Center (ECTC). Testing for the Hazardous Air Pollutants (HAP) study was conducted using the Carbon Injection System (the 4.0 MW Spray Dryer Absorber and the Pulse-Jet Fabric Filter). Testing also continued across the B&W/CHX Heat Exchanger this month as the effects of increased particulate loading are being studied. The 1.0 MW Cold-Side Selective Catalytic Red… more
Date: February 10, 1997
Partner: UNT Libraries Government Documents Department
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Ceramic breeder materials : status and needs.

Description: The tritium breeding blanket is one of the most important components of a fusion reactor because it directly involves both energy extraction and tritium production, both of which are critical to fusion power. Because of their overall desirable properties, lithium-containing ceramic solids are recognized as attractive tritium breeding materials for fusion reactor blankets. Indeed, their inherent thermal stability and chemical inertness are significant safety advantages. In numerous in-pile exper… more
Date: February 2, 1998
Creator: Johnson, C. E.
Partner: UNT Libraries Government Documents Department
open access

Characterization of transient gain x-ray lasers

Description: We have performed numerical simulations of the transient collisional excitation Ni-like Pd 4d {r_arrow} 4p J = 0 {r_arrow} 1 147 {angstrom} laser transition recently observed at Lawrence Livermore National Laboratory (LLNL). The high gain {approximately}35 cm results from the experiment are compared with detailed modeling simulations from the 1-D RADEX code in order to better understand the main physics issues affecting the measured gain and x-ray laser propagation along the plasma column. Simu… more
Date: February 7, 1999
Creator: Dunn, J; Osterheld, A & Shlyaptsev, V
Partner: UNT Libraries Government Documents Department
open access

Predictive Model and Methodology for Heat Treatment Distortion

Description: The purpose of this project was to develop a modeling methodology and software tool to simulate and predict the results of heat treatment, especially distortion. In order to develop a simulation tool, significant technical, analytical, and experimental resources were needed. This task was too large and complex for just one company or organization to address. To this end, 4 national laboratories (Los Alamos National Laboratory, Lawrence Livermore National Laboratory, the Oak Ridge National Labor… more
Date: February 17, 1998
Creator: Ludtka, G.M.
Partner: UNT Libraries Government Documents Department
open access

Rock mechanics contributions from defense programs

Description: An attempt is made at illustrating the many contributions to rock mechanics from US defense programs, over the past 30-plus years. Large advances have been achieved in the technology-base area covering instrumentation, material properties, physical modeling, constitutive relations and numerical simulations. In the applications field, much progress has been made in understanding and being able to predict rock mass behavior related to underground explosions, cratering, projectile penetration, and… more
Date: February 1, 1992
Creator: Heuze, F.E.
Partner: UNT Libraries Government Documents Department
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Transport of neptunium through Yucca Mountain tuffs

Description: Neptunium has a high solubility in groundwaters from Yucca Mountain [1]. Uranium in nuclear reactors produces {sup 237}Np which has a half-life of 2.1 4 {times} 10{sup 6} years. Consequently, the transport of {sup 237}Np through tuffs is of major importance in assessing the performance of a high-level nuclear waste repository at Yucca Mountain. The objective of this work is to determine the amount of Np retardation that is provided by the minerals in Yucca Mountain tuffs as a function of ground… more
Date: February 1, 1993
Creator: Triay, I. R.; Robinson, B. A.; Mitchell, A. J.; Overly, C. M. & Lopez, R. M.
Partner: UNT Libraries Government Documents Department
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Calendar year 1994 groundwater quality report for the Upper East Fork Poplar Creek Hydrogeologic Regime, Y-12 Plant, Oak Ridge, Tennessee: 1994 groundwater quality data and calculated rate of contaminant migration

Description: This annual groundwater quality report (GWQR) contains groundwater and surface water quality data obtained during the 1994 calendar year (CY) at several waste-management facilities and a petroleum fuel underground storage tank (UST) site associated with the US Department of Energy (DOE) Y-12 Plant located on the DOE Oak Ridge Reservation (ORR) southeast of Oak Ridge, Tennessee. The sites addressed by this document are located within the Upper East Fork Poplar Creek Hydrogeologic Regime (East Fo… more
Date: February 1, 1995
Partner: UNT Libraries Government Documents Department
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Proceedings of the 21st DOE/NRC Nuclear Air Cleaning Conference; Sessions 1--8

Description: Separate abstracts have been prepared for the papers presented at the meeting on nuclear facility air cleaning technology in the following specific areas of interest: air cleaning technologies for the management and disposal of radioactive wastes; Canadian waste management program; radiological health effects models for nuclear power plant accident consequence analysis; filter testing; US standard codes on nuclear air and gas treatment; European community nuclear codes and standards; chemical p… more
Date: February 1, 1991
Creator: First, M. W.
Partner: UNT Libraries Government Documents Department
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Target rapidity baryon distributions in {sup 28}Si + {sup 197}Au and {sup 197}Au + {sup 197}Au collisions at 14.6 and 11.7 A{center_dot}GeV/c

Description: Proton and deuteron kinetic energy spectra have been measured at target rapidities for both minimum bias and central collisions of 14.6 A{center_dot}GeV/c {sup 28}Si and 11.7 A{center_dot}GeV/c {sup 197}Au beams with a {sup 197}Au target. The spectra were measured from a low energy threshold of approximately E{sub kin}=35 MeV to well over 200 MeV for laboratory angles of 50{degree} to 130{degree} ({vert_bar}{eta}{vert_bar} {le}0.76). The acceptance-corrected spectra have been fit over a limited… more
Date: February 25, 1993
Creator: Sangster, T.C.; Costales, J.B.; Namboodiri, M.N. & Collaboration, E802
Partner: UNT Libraries Government Documents Department
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Opto-mechanical design and fabrication services. Final report

Description: Each of the seven tasks defined under this contract are discussed here. They include: (1) design support for an x-ray spectrometer for the ``Panchuela`` down-hole experiment at the Nevada Test Site; (2) development and demonstration of an optical alignment method for aligning the 180 degree bend achromatic magnetic section of the Ground Test Accelerator; (3) development of magnet support and manipulation concepts for the 17 magnets of the Ground Test Accelerator; (4) design support for the trip… more
Date: February 28, 1988
Partner: UNT Libraries Government Documents Department
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Engineered barrier environment, Yucca Mountain

Description: The US Department of Energy is studying the suitability of Yucca Mountain (YM) as a potential nuclear waste repository site. Environmental conditions are important to engineered barrier system (EBS) design, materials testing, selection, design criteria, waste-form characterization, and performance assessment. Yucca Mountain is located in uninhabited desert which results in an environmental framework (unsaturated conditions, and sorptive properties of the rock materials) that is generally favora… more
Date: February 1, 1993
Creator: Wilder, D. G.
Partner: UNT Libraries Government Documents Department
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Scale-up of mild gasification to a process development unit. Progress report for August 21--November 20, 1994

Description: The overall objective of this project is to develop the IGT Mild-Gasification (MILDGAS) process for near-term commercialization. The specific objectives of the program are to: design, construct, and operate a 24-tons/day adiabatic process development unit (PDU) to obtain process performance data suitable for further design scaleup; obtain large batches of coal-derived co-products for industrial evaluation; prepare a detailed design of a demonstration unit; and develop technical and economic pla… more
Date: February 1, 1995
Creator: Doane, E. P.; Carty, R. H. & Foster, H.
Partner: UNT Libraries Government Documents Department
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Functions and requirements for the INEL light duty utility arm sampler end effector

Description: This sampler end effector system functions and requirements document defines the system functions that the end effector must perform as well as the requirements the design must meet. Safety, quality assurance, operations, environmental conditions, and regulatory requirements have been considered. The main purpose of this document is to provide a basis for the end effector engineering, design, and fabrication activities. The document shall be the living reference document to initiate the develop… more
Date: February 1, 1995
Creator: Pace, D.P. & Barnes, G.E.
Partner: UNT Libraries Government Documents Department
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Evaluation of Low and High Frequency Sound for Enhancing Fish Screening Facilities to Protect Outmigrating Salmonids.

Description: The need to provide passage and protective screens at irrigation diversions has always been a necessary part of the Columbia River Basin Fish and Wildlife Program (NPPC 1984, 1987, 1994). From 1985 through 1990, fish protection facilities in large irrigation diversions throughout the Columbia Basin, especially in the Yakima Basin, were updated. After 1990, fish protection efforts turned to installation of new facilities on unscreened diversions and to repair and upgrade of older facilities. The… more
Date: February 1998
Creator: Mueller, Robert P.; Neitzel, Duane A. & Mavros, William V.
Partner: UNT Libraries Government Documents Department
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Construction project data sheet for the environmental, safety and health upgrades: Phase 3 Program FY 1991 line item

Description: This document is prepared in tabular form and depicts costs and safety analysis of a number of Mound construction projects. Some projects described include solvent waste handling, environmental buffer zone, and sanitary treatment plant.
Date: February 3, 1989
Creator: Hunter, M. R.
Partner: UNT Libraries Government Documents Department
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Point defect production, geometry and stability in silicon: A molecular dynamics simulation study

Description: We present results of molecular dynamics computer simulation studies of the threshold energy for point defect production in silicon. We employ computational cells with 8000 atoms at ambient temperature of 10 K that interact via the Stillinger-Weber potential. Our simulations address the orientation dependence of the defect production threshold as well as the structure and stability of the resulting vacancy-interstitial pairs. Near the <111> directions, a vacancy tetrahedral-interstitial pair is… more
Date: February 1, 1994
Creator: Caturla, M.J.; Rubia, T.D. de la & Gilmer, G.H.
Partner: UNT Libraries Government Documents Department
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Robust controller design of four wheel steering systems using mu synthesis techniques

Description: In this paper, a linearized four wheel steering (4WS) system model is deduced and then modified into a form which is appropriate for applying Matlab {mu} Toolbox to design robust controller. Several important topics are discussed in detail, such as (1) how to make system set-up match Matlab {mu} Toolbox requirement, (2) how to select weights based on plant`s uncertainty, (3) how to solve controller discretization problem, and (4) how to adjust the system so that the conditions necessary for usi… more
Date: February 27, 1995
Creator: Gao, X.; McVey, B. D. & Tokar, R. L.
Partner: UNT Libraries Government Documents Department
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Beam tests of the 12 MHz RFQ RIB injector for ATLAS.

Description: In recent tests without beam, the Argonne 12 MHz split-coaxial radio-frequency quadruple (RFQ) achieved a cw intervane voltage of more than 100 kV, the design operating voltage for the device. This voltage is sufficient for the RFQ to function as the first stage of a RIB injector for the Argonne Tandem Linear Accelerator System (ATLAS). Previously reported beam dynamics calculations for the structure predict longitudinal emittance growth of only a few keV{center_dot}ns for beams of mass 132 and… more
Date: February 8, 1999
Creator: Kaye, R. A.
Partner: UNT Libraries Government Documents Department
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Criticality safety evaluation for K Area Disassembly Basin cleanup

Description: Preparations are currently being made to remove sludge from the Disassembly Basin in all reactor areas. Because this sludge contains fissile isotopes, it is necessary to perform a criticality safety evaluation for the planned activities. A previous evaluation examined the criticality safety aspects of the sludge removal process for L Area. This document addresses the criticality safety aspects of the K Area Disassembly Basin cleanup work. The K Area Disassembly Basin cleanup will involve, as a … more
Date: February 1, 1994
Creator: Rosser, M.A.
Partner: UNT Libraries Government Documents Department
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Site characterization data from the Area 5 science boreholes, Nevada Test Site, Nye County, Nevada

Description: The Science Borehole Project consists of eight boreholes that were drilled (from 45.7 m [150 ft] to 83.8 m [275 ft] depth) in Area 5 of the Nevada Test Site, Nye County, Nevada, on behalf of the US Department of Energy. These boreholes are part of the Area 5 Site Characterization Program developed to meet data needs associated with regulatory requirements applicable to the disposal of low-level and mixed waste at this site. This series of boreholes was specifically designed to characterize para… more
Date: February 1, 1995
Creator: Blout, D.O.; Hammermeister, P. & Zukosky, K.A.
Partner: UNT Libraries Government Documents Department
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Role of underground testing to determine suitability of Yucca Mountain as a potential repository site

Description: A brief description of the Exploratory Shaft based site characterization testing program for the Yucca Mountain Project of the permanent disposal of high level radioactive waste is briefly described in this paper. Details of the testing program are presented in the DOE-issued Site Characterization Plan. Overview of the current planning process and status of various activities is briefly described. This study will reevaluate the mining method, ESF location and any changes in the ESF testing prog… more
Date: February 1, 1990
Creator: Kalia, H.N.
Partner: UNT Libraries Government Documents Department
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