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  Partner: UNT Libraries Government Documents Department
 Decade: 1980-1989
 Collection: Technical Report Archive and Image Library
Alternatives for Disposal of Raffinate from the TRUEX Process

Alternatives for Disposal of Raffinate from the TRUEX Process

Date: December 1989
Creator: Trevorrow, L. E. & Vandegrift, G. F.
Description: Possible methods for disposing of the immobilized raffinate from TRUEX processing are reviewed. The purpose of the TRUEX process is to extract transuranium elements from high-level and TRU wastes into a small volume that can be managed at lower cost than that of the original wastes. The raffinate from the TRUEX process, containing negligible concentrations of transuranium elements, would be combined with salt solutions also derived from processing high-level waste, and the mixture would be converted to grout.
Contributing Partner: UNT Libraries Government Documents Department
An Automated Procedure for Covariation-Based Detection of RNA Structure

An Automated Procedure for Covariation-Based Detection of RNA Structure

Date: December 1989
Creator: Winker, S.; Overbeck, R.; Woese, Carl R.; Olsen, G. J. & Pfluger, N.
Description: This paper summarizes our investigations into the computational detection of secondary and tertiary structure of ribosomal RNA. We have developed a new automated procedure that not only identifies potential bondings of secondary and tertiary structure, but also provides the covariation evidence that supports the proposed bondings, and any counter-evidence that can be detected in the known sequences. A small number of previously unknown bondings have been detected in individual RNA molecules (16S rRNA and 7S RNA) through the use of our automated procedure. Currently, we are systematically studying mitochondrial rRNA. Our goal is to detect tertiary structure within 16S rRNA and quaternary structure between 16S and 23S rRNA. Our ultimate hope is that automated covariation analysis will contribute significantly to a refined picture of ribosome structure. Our colleagues in biology have begun experiments to test certain hypotheses suggested by an examination of our program's output. These experiments involve sequencing key portions of the 23S ribosomal RNA for species in which the known 16S ribosomal RNA exhibits variation (from the dominant pattern) at the site of a proposed bonding. The hope is that the 23S ribosomal RNA of these species will exhibit corresponding complementary variation or generalized covariation.
Contributing Partner: UNT Libraries Government Documents Department
An Evaluation of Alternative Reactor Vessel Cutting Technologies for the Experimental Boiling Water Reactor at Argonne National Laboratory

An Evaluation of Alternative Reactor Vessel Cutting Technologies for the Experimental Boiling Water Reactor at Argonne National Laboratory

Date: December 1989
Creator: Boing, L. E.; Henley, D. R.; Manion, William J. & Gordon, J. W.
Description: Metal cutting techniques that can be used to segment the reactor pressure vessel of the Experimental Boiling Water Reactor (EBWR) at Argonne National Laboratory (ANL) have been evaluated by Nuclear Energy Services. Twelve cutting technologies are described in terms of their ability to perform the required task, their performance characteristics, environmental and radiological impacts, and cost and schedule considerations. Specific recommendations regarding which technology should ultimately be used by ANL are included. The selection of a cutting method was the responsibility of the decommissioning staff at ANL, who included a relative weighting of the parameters described in this document in their evaluation process.
Contributing Partner: UNT Libraries Government Documents Department
Parallelizing the SDI ACCESS Algorithm for the Connection Machine-2

Parallelizing the SDI ACCESS Algorithm for the Connection Machine-2

Date: December 1989
Creator: Ewing, Thomas F. & Leibfritz, David W.
Description: One aspect of Argonne research in parallel computing involves the speed and other properties of parallel SDI algorithms. Various algorithms under study have exhibited speedups resulting from parallelization on shared-memory machines. A weapon-target accessibility algorithm called ACCESS exhibited a high degree of inherent parallelism and has been studied on a wide variety of sequential and parallel multiple instruction multiple data (MIMD) machines. To study ACCESS on a massively parallel single instruction multiple data (SIMD) machine architecture, ANL researchers developed a version of ACCESS on a Thinking Machines Corporation 16K processor Connection Machine-2 (CM-2) located at the ACRF. ANL researchers wrote the Connection Machine version of ACCESS in C(*), a version of C by Thinking Machines Corporation with extensions to accommodate SIMD parallelism. Because of the large number of available physical processors and the ability to create virtual processors on the CM-2, the Connection Machine version of ACCESS was able to process an array of 128 x 1024 tasks in parallel. For the data tested, the CM-2 implementation of ACCESS was faster than both the parallel version run on the Alliant FX/8, the Encore Multimax, and the Sequent Balance and the sequential version run on the ANL Cray X-MP/14. For the ...
Contributing Partner: UNT Libraries Government Documents Department
Project Plan for the Decontamination and Decommissioning of the Argonne National Laboratory Experimental Boiling Water Reactor

Project Plan for the Decontamination and Decommissioning of the Argonne National Laboratory Experimental Boiling Water Reactor

Date: December 1989
Creator: Boing, L. E.
Description: In 1956, the Experimental Boiling Water Reactor (EBWR) Facility was first operated at Argonne National Laboratory (ANL) as a test reactor to demonstrate the feasibility of operating an integrated power plant using a direct cycle boiling water reactor as a heat source. In 1967, ANL permanently shut down the EBWR and placed it in dry lay-up. This project plan presents the schedule and organization for the decontamination and decommissioning of the EBWR Facility which will allow it to be reused by other ANL scientific research programs. The project total estimated cost is $14.3M and is projected to generate 22,000 cubic feet of low-level radioactive waste which will be disposed of at an approved DOE burial ground. 18 figs., 3 tabs.
Contributing Partner: UNT Libraries Government Documents Department
Electroformation of Uranium Hemispherical Shells

Electroformation of Uranium Hemispherical Shells

Date: November 1989
Creator: Marshall, S. L.; Redey, L.; Vandegrift, G. F. & Vissers, D. R.
Description: This effort was directed at developing an electrochemical process for forming uniform and dendrite-free deposits of uranium from molten salts. This process is to be used for the electroformation of free-standing hemispherical shells of uranium for nuclear applications.
Contributing Partner: UNT Libraries Government Documents Department
PC-DYMAC: Personal Computer - DYnamic Materials ACcounting

PC-DYMAC: Personal Computer - DYnamic Materials ACcounting

Date: November 1989
Creator: Jackson, B. Gail
Description: This manual was designed to provide complete documentation for the computer system used by the EBR-II Fuels and Materials Department, Argonne National Laboratory-West (ANL-W) for accountability of special nuclear materials (SNM). This document includes background information on the operation of the Fuel Manufacturing Facility (FMF), instructions on computer operations in correlation with production and a detailed manual for DYMAC operation. 60 figs.
Contributing Partner: UNT Libraries Government Documents Department
A Systematic Analysis of the Spectra of Trivalent Actinide Chlorides in D3h Site Symmetry

A Systematic Analysis of the Spectra of Trivalent Actinide Chlorides in D3h Site Symmetry

Date: November 1989
Creator: Carnall, W. T.
Description: The optical spectra of actinide ions in the compound AnCl₃ and doped into single crystal LaCl₃ were interpreted in terms of transitions within 5f{sup N} configurations. Energy-level calculations were carried out using an effective operator Hamiltonian, the parameters of which were determined by fitting experimental data. Atomic and crystal-field matrices were diagonalized simultaneously assuming an approximate D{sub 3h} site symmetry. The spectroscopic data were taken from the literature but in most cases supplemented by unpublished measurements in absorption and in fluorescence. Spectroscopic data for each ion were analyzed independently, then the model parameters were intercompared and in many cases adjusted such that in the final fitting process the principal interactions showed uniform trends in parameter values with increasing atomic number. Consistent with analyses of the spectra of lanthanide ions in both LaCl₃ and LaF₃, abrupt changes in magnitude of certain crystal-field parameters were found near the center of the 5f{sup N}-series. This resulted in two groups of parameter values, but with consistent trends for both halves of the series, and generally very good agreement between observed and computed energies. A new energy level chart based on computed crystal-field level energies for each trivalent actinide ion has been prepared. in addition, ...
Contributing Partner: UNT Libraries Government Documents Department
Rationale for the Proposed Standard for a Generic Package of Elementary Functions for Ada

Rationale for the Proposed Standard for a Generic Package of Elementary Functions for Ada

Date: October 1989
Creator: Dritz, Kenneth W.
Description: Revision of supplemental paper on proposed Ada standard, organized as a series of questions and answers.
Contributing Partner: UNT Libraries Government Documents Department
An Assessment and Comparison of Fuel Cells for Transportation Applications

An Assessment and Comparison of Fuel Cells for Transportation Applications

Date: September 1989
Creator: Krumpelt, Mike & Christianson, C. C.
Description: Fuel cells offer the potential of a clean, efficient power source for buses, cars, and other transportation applications. When the fuel cell is run on methanol, refueling would be as rapid as with gasoline-powered internal combustion engines, providing a virtually unlimited range while still maintaining the smooth and quiet acceleration that is typical for electric vehicles.
Contributing Partner: UNT Libraries Government Documents Department
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