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in creator/contributor: "Worl, L."

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Gas generation by pure and impure plutonium oxide materials in sealed containers.

The Department of Energy (DOE) standard, DOE-STD-3013-2000, establishes criteria for stabilizing, packaging, and long term safe storage of plutonium-bearing materials at DOE facilities . The Standard applies to oxide or metal that contains at least 30 weight percent plutonium plus uranium. For oxide material a maximum of 5 kg of material is packaged in a nested set of two individually welded containers and the requirements include material stabilization at 950 C, 0 .5 weight percent moisture co… more

Date: January 1, 2003

Creator: Berg, J. M. (John M.); McFarlan, James T.; Padilla, D. D. (Dennis D.); Veirs, D. K. (Douglas Kirk); Worl, L. A. (Laura A.); Harradine, D. M. (David M.) et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Analysis of gas constituents from sealed containers of plutonium oxide materials.

The safe storage of pure and impure plutonium oxide materials in sealed containers is a current Department of Energy (DOE) concern. Plutonium oxides sorb moisture from the atmosphere, and the subsequent radiolytic and/or chemical decomposition of the water has been thought to generate excessive hydrogen pressures inside sealed containers. Eleven sealed containers with ten grams each of plutonium oxide materials have been studied for up to four years. The sealed materials were representative mat… more

Date: January 1, 2002

Creator: Worl, L. A. (Laura A.); Veirs, D. K. (Douglas Kirk); Allen, Tom; Berg, J. M. (John M.); Harradine, D. M. (David M.) & Padilla, D. D. (Dennis D.)

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Gas generation over plutonium oxides in the 94-1 shelf-life surveillance program.

The Department of Energy (DOE) is embarking upon a program to store large quantities of plutonium-bearing materials for up to fifty years. The Los Alamos National Laboratory Shelf Life Project was established to bound the behavior of plutonium-bearing material meeting the DOE 3013 Standard. The shelf life study monitors temperature, pressure and gas composition over oxide materials in a limited number of large-scale 3013 inner containers and in many small-scale containers. For the large-scale s… more

Date: January 1, 2002

Creator: Berg, J. M. (John M.); Harradine, D. M. (David M.); Hill, D. D. (Dallas D.); McFarlan, James T.; Padilla, D. D. (Dennis D.); Prenger, F. Coyne et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Introducing equipment and plutonium glove box modifications for monitoring gas generation over plutonium oxide materials.

DOE is embarking on a program to store large quantities of Pu-bearing materials for up to fifty years. Materials for long-term storage are metals and oxides that are stabilized and packaged according to the DOE storage standard. Experience with PuO, materials has shown that gases generated by catalytic and/or radiolytic processes may accumulate. Of concern are the generation of H, gas from adsorbed water and the generation of HCI or CI, gases from the radiolysis of chloride-containing salts. We… more

Date: January 1, 2002

Creator: Padilla, D. D. (Dennis D.); Berg, J. M. (John M.); Carrillo, A. G. (Alejandro G.); Montoya, A. R. (Adam R.); Morris, J. S. (John S.); Veirs, D. K. (Douglas Kirk) et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Metrology and quality assurance from surveillance of gas compositions over PuO[sub 2]

Until the late 1980s, a primary mission of the Department of Energy (DOE) has been the production of nuclear materials for nuclear weapons. Termination of the Cold War in 1989 and the subsequent nuclear weapons treaties dramatically decreased the inventory needs for nuclear weapons. These activities resulted in the consolidation of nuclear material inventories and activities, generating substantial amounts of surplus nuclear materials ranging from plutonium metal and pure oxides to impure pluto… more

Date: January 1, 2002

Creator: Worl, L. A. (Laura A.); French, Catherine A. & Kreyer, L. S. (Lawrence S.)

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Selective separation of ultra-fine particles by magnetophoresis

The selective and-specific extraction of species of interest fiom local environmental and other sample sources are importaut fbr scientific research, industrial processes, and environmental applications. A novel process for selective separation of ultrafine particles using 'magnetophoresis' is investigated. The principle of this process is that the direction and velocity of particle movement in a magnetic field are determined by magnetic, gravitational, and drag fbrces. By controlling these fbr… more

Date: January 1, 2002

Creator: Ying, T. (Tung-yu); Prenger, F. Coyne; Wingo, R. M. (Robert M.) & Worl, L. A. (Laura A.)

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Integration of advanced nuclear materials separation processes

This is the final report of a two-year, Laboratory Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). This project has examined the fundamental chemistry of plutonium that affects the integration of hydrothermal technology into nuclear materials processing operations. Chemical reactions in high temperature water allow new avenues for waste treatment and radionuclide separation.Successful implementation of hydrothermal technology offers the potential t… more

Date: December 31, 1998

Creator: Jarvinen, G. D.; Worl, L. A.; Padilla, D. D.; Berg, J. M.; Neu, M. P.; Reilly, S. D. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Hydrothermal processing of radioactive combustible waste

Hydrothermal processing has been demonstrated for the treatment of radioactive combustible materials for the US Department of Energy. A hydrothermal processing system was designed, built and tested for operation in a plutonium glovebox. Presented here are results from the study of the hydrothermal oxidation of plutonium and americium contaminated organic wastes. Experiments show the destruction of the organic component to CO{sub 2} and H{sub 2}O, with 30 wt.% H{sub 2}O{sub 2} as an oxidant, at … more

Date: September 1, 1998

Creator: Worl, L. A.; Buelow, S. J.; Harradine, D.; Le, L.; Padilla, D. D. & Roberts, J. H.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Magnetic Separation for Nuclear Material Detection and Surveillance

A high performance superconducting magnet is being developed for particle retrieval from field collected samples. Results show that maximum separation effectiveness is obtained when the matrix fiber diameter approaches the diameter of the particles to be captured. Experimentally, the authors obtained a single particle capture limit with 0.8{micro}m PuO{sub 2} particles with dodecane as a carrier fluid. The development of new matrix materials is being pursued through the controlled corrosion of … more

Date: August 1, 1998

Creator: Worl, L. A.; Devlin, D.; Hill, D.; Padilla, D. & Prenger, F. C.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Use of high gradient magnetic separation for actinide application

Decontamination of materials such as soils or waste water that contain radioactive isotopes, heavy metals, or hazardous components is a subject of great interest. Magnetic separation is a physical separation process that segregates materials on the basis of magnetic susceptibility. Because the process relies on physical properties, separations can be achieved while producing a minimum of secondary waste. Most traditional physical separation processes effectively treat particles larger than 70 m… more

Date: August 1, 1996

Creator: Avens, L. R.; Worl, L. A. & Padilla, D. D.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Magnetic separation for environmental remediation

High Gradient Magnetic Separation (HGMS) is a form of magnetic separation used to separate solids from other solids, liquids or gases. HGMS uses large magnetic field gradients to separate ferromagnetic and paramagnetic particles from diamagnetic host materials. The technology relies only on physical properties, and therefore separations can be achieved while producing a minimum of secondary waste. Actinide and fission product wastes within the DOE weapons complex pose challenging problems for e… more

Date: November 1, 1994

Creator: Schake, A. R.; Avens, L. R.; Hill, D. D.; Padilla, D. D.; Prenger, F. C.; Romero, D. A. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Application of high temperature superconductors to high-gradient magnetic separation

High Gradient Magnetic Separation (HGMS) is a powerful technique which can be used to separate widely dispersed contaminants from a host material, This technology can separate magnetic solids from other solids, liquids or gases. As the name implies HGMS uses large magnetic field gradients to separate ferromagnetic and paramagnetic particles. HGMS separators usually consist of a high-field solenoid magnet, the bore of which contains a fine-structured, ferromagnetic matrix material. The matrix ma… more

Date: June 1, 1994

Creator: Daugherty, M. A.; Prenger, F. C.; Hill, D. D.; Daney, D. E.; Worl, L. W.; Schake, A. R. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Tank waste remediation system milestone report magnetic separation of tank waste: Surrogate system separations report

High-level radioactive waste (HLW) has been stored in large underground storage tanks (UST) at the US Department of Energy`s Hanford Site since 1944. More than 253,000 m{sup 3} of waste have been accumulated in 177 tanks. The waste consists of many different chemicals and are in the form of liquids, slurries, salt cakes and sludges. A magnetic separation effort at Los Alamos National Laboratory is funded through the Tank Waste Remediation System (TWRS) to explore the use of high-gradient magnet… more

Date: January 14, 1994

Creator: Avens, L. R.; Worl, L. A.; Schake, A. R.; Padilla, D. D.; de Aguero, K. J.; Prenger, F. C. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

High gradient magnetic separation applied to environmental remediation

High Gradient Magnetic Separation (HGMS) is an application of superconducting magnet technology to the separation of magnetic solids from other solids, liquids, or gases. The production of both high magnetic fields (>4 T) and large field gradients using superconducting magnet technology has made it possible to separate a previously unreachable but large family of paramagnetic materials. This is a powerful technique that can be used to separate widely dispersed contaminants from a host material … more

Date: August 1, 1993

Creator: Prenger, F. C.; Stewart, W. F.; Hill, D. D.; Avens, L. R.; Worl, L. A.; Schake, A. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Magnetic separation for soil decontamination

High gradient magnetic separation (HGMS) is a physical separation process that is used to extract magnetic particles from mixtures. The technology is used on a large scale in the kaolin clay industry to whiten or brighten kaolin clay and increase its value. Because all uranium and plutonium compounds are slightly magnetic, HGMS can be used to separate these contaminants from non-magnetic soils. A Cooperative Research and Development Agreement (CRADA) was signed in 1992 between Los Alamos Nation… more

Date: February 1, 1993

Creator: Avens, L. R.; Worl, L. A.; deAguero, K. J.; Padilla, D. D.; Prenger, F. C.; Stewart, W. F. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Spectroscopic effects of disorder and vibrational localization in mixed-halide metal-halide chain solids

Resonance Raman techniques, together with lattice-dynamics and Peierls-Hubbard modelling, are used to explore the electronic and vibrational dynamics of the quasi-one-dimensional metal-halogen chain solids [Pt(en){sub 2}][R(en){sub 2}X{sub 2}](ClO{sub 4}){sub 4}, (en = C{sub 2}H{sub 8}N{sub 2} and X=Cl, Br), abbreviated ``PLX.`` The mixed-halide materials PtCl{sub 1-x}Br{sub x} and PtCl{sub 1-x}I{sub x} consist of long mixed chains with heterojunctions between segments of the two constituent ma… more

Date: February 1, 1993

Creator: Love, S. P.; Scott, B.; Worl, L. A.; Huckett, S. C.; Saxena, A.; Huang, X. Z. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Magnetic separation for soil decontamination

Date: January 1, 1993

Creator: Avens, L. R.; Worl, L. A.; deAguero, K. J.; Padilla, D. D.; Prenger, F. C.; Stewart, W. F. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Spectroscopic effects of disorder and vibrational localization in mixed-halide metal-halide chain solids

Resonance Raman techniques, together with lattice-dynamics and Peierls-Hubbard modelling, are used to explore the electronic and vibrational dynamics of the quasi-one-dimensional metal-halogen chain solids [Pt(en)[sub 2]][R(en)[sub 2]X[sub 2]](ClO[sub 4])[sub 4], (en = C[sub 2]H[sub 8]N[sub 2] and X=Cl, Br), abbreviated PLX.'' The mixed-halide materials PtCl[sub 1-x]Br[sub x] and PtCl[sub 1-x]I[sub x] consist of long mixed chains with heterojunctions between segments of the two constituent mate… more

Date: January 1, 1993

Creator: Love, S. P.; Scott, B.; Worl, L. A.; Huckett, S. C.; Saxena, A.; Huang, X. Z. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Local states in one-dimensional CDW (charge density wave) materials: Spectral signatures for polarons and bipolarons in MX chains

We have undertaken a combined theoretical and experimental effort directed toward the examination of both the ground and defect states in halide-bridged mixed-valence metal linear chains materials as they are tuned within and between broken symmetry phases. Novel low-dimensional highly correlated electronic materials offer a difficult theoretical challenge as we must span from a description of electronic structure on a molecular scale to the meso scale structure that is intrinsic to these solid… more

Date: January 1, 1990

Creator: Swanson, B. I.; Donohoe, R. J.; Worl, L. A.; Bulou, A. D.F.; Arrington, C. A.; Gammel, J. T. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department