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Properties of near-net shape metallic components made by the directed light fabrication process

Description: Directed Light Fabrication (DLF) is a process invented at Los Alamos National Laboratory that can be used to fuse any metal powder directly to a fully dense, near-net shape component with full structural integrity. A solid model design of a desired component is first developed on a computer work station. A motion path, produced from the solid model definition, is translated to actual machine commands through a post-processor, specific to the deposition equipment. The DLF process uses a multi-ax… more
Date: October 1, 1997
Creator: Lewis, G. K.; Milewski, J. O.; Thoma, D. B. & Nemec, R. B.
Item Type: Refine your search to only Article
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Proposed risk evaluation guidelines for use by the DOE-AL Nuclear Explosive Safety Division in evaluating proposed shipments of nuclear components

Description: The licensing requirements of 10 CFR 71 (US Code of Federal Regulations) are the primary criteria used to license proposed US Department of Energy (DOE) shipments of nuclear components. However, if a shipment cannot meet 10 CFR 71 requirements, a Transportation System Risk Assessment (TSRA) is prepared to document: (1) the degree of compliance of proposed DOE shipments of nuclear components with applicable federal regulations, and (2) the risk associated with the proposed shipments. The Nuclear… more
Date: October 1, 1997
Creator: Just, R. A. & Love, A. F.
Item Type: Refine your search to only Report
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Providing solutions to energy and environmental problems. Quarterly technical progress report, July 1, 1997--September 30, 1997

Description: The Jointly Sponsored Research Program emphasizes technology commercialization and continues to be highly successful and supported strongly and enthusiastically by WRI`s industrial clientele. All of the available Department of Energy (USDOE) funding for each of the first seven years has been committed to projects. This report provides a description of projects and expenditures on fossil projects and environmental monitoring.
Date: October 1, 1997
Item Type: Refine your search to only Report
open access

Providing solutions to energy and environmental problems. Quarterly technical progress report, July 1, 1997--September 30, 1997

Description: The Jointly Sponsored Research Program emphasizes technology commercialization and continues to be highly successful and supported strongly and enthusiastically by WRI`s industrial clientele. All of the available Department of Energy (USDOE) funding for each of the first seven years has been committed to projects. This report provides a description of projects and expenditures on fossil projects and environmental monitoring.
Date: October 1, 1997
Item Type: Refine your search to only Report
open access

Pu and Gd Chemistry of Zirconolite Polytypes in a Titanate Ceramic

Description: Titanate-based ceramics are being developed as possible candidates for immobilizing excess plutonium from dismantled nuclear weapons. Evidence from testing of similar ceramics and natural analogues suggests that this material is very resistant to aqueous corrosion. The purpose of this work is to describe the phase(s) present in these ceramics. In particular the authors are interested in the disposition of important elements such as Pu and Gd (to be incorporated into the wasteform as a neutron a… more
Date: October 1, 1997
Creator: Bakel, A. J.; Buck, E. C. & Ebbinghaus, B.
Item Type: Refine your search to only Article
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Public information circular for shipments of irradiated reactor fuel. Revision 12

Description: This circular has been prepared to provide information on the shipment of irradiated reactor fuel (spent fuel) subject to regulation by the US Nuclear Regulatory Commission (NRC). It provides a brief description of spent fuel shipment safety and safeguards requirements of general interest, a summary of data for 1979--1996 highway and railway shipments, and a listing, by State, of recent highway and railway shipment routes. The enclosed route information reflects specific NRC approvals that have… more
Date: October 1, 1997
Item Type: Refine your search to only Report
open access

Public problems: Still waiting on the marketplace for solutions

Description: This report addresses the need for government sponsored R and D to address real public problems. The motivation is that a public benefit of the money spent must be demonstrated. The areas identified as not having appropriate attention resulting in unmet public needs include healthcare cost, cost and benefits of regulations, infrastructure problems, defense spending misaligned with foreign policy objectives, the crime problem, energy impact on the environment, the education problem, low producti… more
Date: October 1, 1997
Creator: Gover, J.; Carayannis, E. & Huray, P.
Item Type: Refine your search to only Article
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Public water supply and distribution at the FEMP

Description: On February 17th, 1996, the Fernald Environmental Management Project (FEMP), a former Department of Energy uranium processing facility near the rural town of Fernald, Ohio, became a ``user`` instead of a ``producer``, of potable water by tying into the Cincinnati Water Works new Public Water Supply System. This satisfied the future site needs of potable water and nullified the need to follow the sampling requirements set forth by the Environmental Protection Agency and the Safe Drinking Water A… more
Date: October 1, 1997
Creator: Neary, C.
Item Type: Refine your search to only Article
open access

Purification of {sup 238}PuO{sub 2} scrap for heat source fuel

Description: The Nuclear Materials Technology (NMT) Division of Los Alamos National Laboratory has initiated a development program to recover and purify plutonium-238 oxide from impure feed sources in a glove box environment. A glove box line has been designed and a chemistry flowsheet developed to perform this recovery task at large scale. The initial demonstration effort focused on purification of {sup 238}PuO{sub 2} fuel by HNO{sub 3}/HF dissolution, followed by plutonium(III) oxalate precipitation and c… more
Date: October 1997
Creator: Schulte, L. D.; Purdy, G. M.; Jarvinen, G. D.; Ramsey, K.; Silver, G. L.; Espinoza, J. et al.
Item Type: Refine your search to only Article
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QCD results from D-Zero

Description: We present recent results on jet production, dijet angular distributions, W+ Jets, and color coherence from p{anti p} collisions at {radical}s = 1.8 TeV at the Fermilab Tevatron Collider using the D0 detector. The data are compared to perturbative QCD calculations or to predictions of parton shower based Monte Carlo models.
Date: October 1, 1997
Creator: Varelas, N.
Item Type: Refine your search to only Article
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"Quadrupoled" materials for second-order nonlinear optics

Description: We describe a new approach to second-order nonlinear optical materials, namely quadrupoling. This approach is valid in the regime of Kleinman (full permutation) symmetry breaking, and thus requires a two- or three dimensional microscopic nonlinearity at wavelengths away from material resonances. This {open_quotes}quadrupolar{close_quotes} nonlinearity arises from the second rank pseudotensor of the rotationally invariant representation of the second-order nonlinear optical tensor. We have exper… more
Date: October 1, 1997
Creator: Hubbard, S. F.; Petschek, R. G. & Singer, K. D.
Item Type: Refine your search to only Article
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Quantification of holdup

Description: This procedure describes the elements of the Safeguards Measurements (SM) holdup program. This procedure supplies job aids for evaluating non-routine holdup measurement locations. This procedure is intended to allow operational freedom to evaluate and measure holdup based on the supplied information. This procedure describes suggested measurement techniques which can be employed independently or in combination. Safety requirements and prerequisites are expected to be followed completely.
Date: October 1, 1997
Item Type: Refine your search to only Report
open access

The quantum efficiency of InGaAsSb thermophotovoltaic diodes

Description: Uncoated InGaAsSb/GaSb thermophotovoltaic (TPV) diodes with 0.56 eV (2.2 {micro}m) bandgaps exhibit external quantum efficiencies of 59% at 2 {micro}m, which corresponds to an internal quantum efficiency of 95%. The structures were grown by molecular-beam epitaxy. The devices have electron diffusion lengths as long as 29 {micro}m in 8-{micro}m-wide p-InGaAsSb layers and hole diffusion lengths of 3 {micro}m in 6-{micro}m-wide n-InGaAsSb layers. The electron and hole diffusion lengths appear to i… more
Date: October 1, 1997
Creator: Martinelli, Ramon U.; Garbuzov, Dmitri Z.; Lee, Hao; Morris, Nancy; Odubanjo, Tunde; Taylor, Gordon C. et al.
Item Type: Refine your search to only Report
open access

Quantum Monte Carlo calculations for light nuclei

Description: Quantum Monte Carlo calculations of ground and low-lying excited states for nuclei with A {le} 8 have been made using a realistic Hamiltonian that fits NN scattering data. Results for more than two dozen different (J{sup {pi}}, T) p-shell states, not counting isobaric analogs, have been obtained. The known excitation spectra of all the nuclei are reproduced reasonably well. Density and momentum distributions and various electromagnetic moments and form factors have also been computed. These are… more
Date: October 1, 1997
Creator: Wiringa, R.B.
Item Type: Refine your search to only Report
open access

Radiographic least-squares fitting technique accurately measures dimensions and x-ray attenuation

Description: In support of stockpile stewardship and other important nondestructive test (NDT) applications, the authors seek improved methods for rapid evaluation of materials to detect degradation, warping, and shrinkage. Typically, such tests involve manual measurements of dimensions on radiographs. The authors seek to speed the process and reduce the costs of performing NDT by analyzing radiographic data using a least-squares fitting technique for rapid evaluation of industrial parts. In 1985, Whitman, … more
Date: October 1, 1997
Creator: Kelley, T. A. & Stupin, D. M.
Item Type: Refine your search to only Article
open access

Radiological dose assessment for the dismantlement and decommissioning option for the Heavy Water Components Test Reactor facility at the Savannah River Site, Aiken, South Carolina

Description: Potential maximum radiation dose rates for a 10,000-year horizon were calculated for the dismantlement and decommissioning option for the Heavy Water Components Test Reactor facility at the Savannah River Site. The residual radioactive material guidelines (RESRAD) computer code was used. The study will help determine if it is acceptable (in terms of DOE radiation dose limits) for activated and contaminated concrete to remain in the facility, along with embedded radioactive piping and radioactiv… more
Date: October 1, 1997
Creator: Faillace, E. R.; Kamboj, S.; Yu, C. & Chen, S. Y.
Item Type: Refine your search to only Report
open access

Radiological monitoring plan for the Oak Ridge Y-12 Plant: Surface Water

Description: The Y-12 Plant conducts a surface water monitoring program in response to DOE Orders and state of Tennessee requirements under the National Pollutant Discharge Elimination System (NPDES). The anticipated codification of DOE Order 5400.5 for radiation protection of the public and the environment (10 CFR Part 834) will require an environmental radiation protection plan (ERPP). The NPDES permit issued by the state of Tennessee requires a radiological monitoring plan (RMP) for Y-12 Plant surface wa… more
Date: October 1, 1997
Item Type: Refine your search to only Report
open access

Rapid fabrication of materials using directed light fabrication

Description: Directed light fabrication (DLF) is a rapid fabrication process that fuses gas delivered metal powders within a focal zone of a laser beam to produce fully dense, near-net shape, 3-dimensional metal components from a computer generated solid model. Computer controls dictate the metal deposition pathways, and no preforms or molds are required to generate complex sample geometries. The focal zone of the laser beam is programmed to move along or across a part cross-section, and coupled with a mult… more
Date: October 1, 1997
Creator: Thoma, Dan J.; Lewis, Gary K.; Milewski, John O.; Chen, Katherine C. & Nemec, Ronald B.
Item Type: Refine your search to only Article
open access

Rapid space hardware development through computer-automated testing

Description: FORTE, the Fast On-Orbit Recording of Transient Events small satellite designed and built by Los Alamos and Sandia National Laboratories, is scheduled for launch in August, 1997. In the spirit of {open_quotes}better, cheaper, faster{close_quotes} satellites, the RF experiment hardware (receiver and trigger sub-systems) necessitated rapid prototype testing and characterization in the development of space-flight components. This was accomplished with the assembly of engineering model hardware pri… more
Date: October 1, 1997
Creator: Masters, D.S. & Ruud, K.K.
Item Type: Refine your search to only Article
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Rapidity Correlations and {Delta}G from Prompt Photon Plus Jet Production in Polarized pp Collisions

Description: A study of prompt photon plus associated jet production is performed at next-to-leading order (O({alpha}{alpha}{sub s}{sup 2})) in QCD at {radical}S = 200--500 GeV, appropriate for the RHIC polarized {rvec p}{rvec p} collider experiment. Momentum correlations between the jet and photon are examined and the utility of the process as a method for constraining the size and shape of the polarized gluon density of the proton {Delta}G is examined.
Date: October 1, 1997
Creator: Chang, Sanghyeon; Coriano, Claudio & Gordon, L.E.
Item Type: Refine your search to only Report
open access

Reaction kinetics relevant to the recycle hydride-dehydride process for plutonium recovery

Description: Objectives of this one-year, Laboratory Directed Research and Development (LDRD) project were the expansion of fundamental knowledge of plutonium chemistry and the development of information for enhancing plutonium recovery methods and weapons safety. Results of kinetic studies demonstrate that the monoxide monohydride, PuO(H), formed during corrosion of plutonium by water in pyrophoric when dry and acts as an initiator for hydride-catalyzed reaction of the metal with air. The catalyzed corrosi… more
Date: October 1, 1997
Creator: Haschke, J. M. & Allen, T. H.
Item Type: Refine your search to only Report
open access

Reactor beam calculations to determine optimum delivery of epithermal neutrons for treatment of brain tumors

Description: Studies were performed to assess theoretical tumor control probability (TCP) for brain-tumor treatment with boron neutron capture therapy (BNCT) using epithermal neutron sources from reactors. The existing epithermal-neutron beams at the Brookhaven Medical Research Reactor Facility (BMRR), the Petten High Flux Reactor Facility (HWR) and the Finnish Research Reactor 1 (FIR1) have been analyzed and characterized using common analytical and measurement methods allowing for this inter-comparison. E… more
Date: October 1, 1997
Creator: Wheeler, F. J.; Nigg, D. W. & Capala, J.
Item Type: Refine your search to only Article
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Recent advances in the chemistry and applications of the Diphonix resins

Description: The Diphonix class of ion exchange resins is characterized by the presence of geminally substituted diphosphonic acid groups chemically bonded to a polymer matrix. Regular Diphonix contains gem-diphosphonic groups chemically bonded to a sulfonated styrene-divinylbenzene matrix. Modification of the properties of Regular Diphonix are achieved by the introduction of additional functional groups such as anion exchange groups in Diphonix-A and phenolic groups in Diphonix-CS. Diphosil has a silica ma… more
Date: October 1, 1997
Creator: Horwitz, E.P.; Chiarizia, R.; Alexandratos, S.D. & Gula, M.
Item Type: Refine your search to only Article
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