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  Partner: UNT Libraries Government Documents Department
 Decade: 1970-1979
 Collection: Technical Report Archive and Image Library
Iterative Solution of Linear Programs

Iterative Solution of Linear Programs

Date: July 1979
Creator: Mangasarian, Olvi L.
Description: By perturbing a linear program to a quadratic program, it is possible to solve the latter in its dual variable space by iterative techniques such as successive over-relaxation (SOR) methods. This provides a solution to the original linear program.
Contributing Partner: UNT Libraries Government Documents Department
A Nondestructive Assay System for use in Decommissioning a Plutonium-Handling Facility

A Nondestructive Assay System for use in Decommissioning a Plutonium-Handling Facility

Date: July 1979
Creator: Argonne National Laboratory. Special Materials Division. Nondestructive Assay Section.
Description: Argonne National Laboratory is decommissioning a facility used to fabricate reactor fuel elements. The equipment is contaminated with alpha emitters. The objective of decontamination is to reduce the TRU concentrations below 10 nCi/g of waste. A portable NDA procedure using Na I (TI ) gamma-spectrometric techniques was selected to measure the residual Pu and 2i 1 Am in the glove boxes. Assays were performed at different stages in the decontamination process to estimate the detection system sensitivity and the effectiveness of the cleaning efforts.
Contributing Partner: UNT Libraries Government Documents Department
Nonlinear Ergodic Theory in Banach Spaces

Nonlinear Ergodic Theory in Banach Spaces

Date: July 1979
Creator: Reich, Simeon
Description: The author proves the mean ergodic theorem for nonlinear non-expansive mappings in Banach spaces, extends it by a different argument, deduces several consequences, and points out open problems.
Contributing Partner: UNT Libraries Government Documents Department
Plastic Heat Exchangers : A State-of-the-Art Review

Plastic Heat Exchangers : A State-of-the-Art Review

Date: July 1979
Creator: Miller, David; Holtz, Robert E.; Koopman, R. Nelson; Marciniak, Thomas J. & MacFarlane, Donald R.
Description: Significant increases in energy utilization efficiency can be achieved through the recovery of low-temperature rejected heat. This energy conserving possibility provides incentive for the development of heat exchangers which could be employed in applications where conventional units cannot be used. Some unique anticorrosion and nonstick characteristics of plastics make this material very attractive for heat recovery where condensation, especially sulfuric acid, and fouling occur. Some of the unique characteristics of plastics led to the commercial success of DuPont's heat exchangers utilizing polytetrafluoroethylene (trade name Teflon) tubes. Attributes which were exploited in this application were the extreme chemical inertness of the material and its flexibility, which enabled utilization in odd-shaped spaces. The wide variety of polymeric materials available ensures chemical inertness for almost any application. Lower cost, compoundability with fillers to improve thermal/mechanical properties, and versatile fabrication methods are incentives for many uses. Also, since many plastics resist corrosion, they can be employed in lower temperature applications (< 436 K), where condensation can occur and metal units have been unable to function. It is clear that if application and design can be merged to produce a cost-effective alternate to present methods of handling low-temperature rejected heat, then there is significant incentive ...
Contributing Partner: UNT Libraries Government Documents Department
Production Runs on the CRAY-1

Production Runs on the CRAY-1

Date: July 1979
Creator: Rudsinski, Larry & Pieper, Gail W.
Description: Argonne National Laboratory (ANL) is engaged in a project to determine the impact of advanced scientific computers on Argonne's computing workload. The CRAY-1 was chosen to begin our investigation because it was the only machine currently available that qualifies as an advanced scientific computer, or Class VI (one capable of executing 20 to 60 million floating point operations per second).
Contributing Partner: UNT Libraries Government Documents Department
Review of Sodium Effects on Candidate Materials for Central Receiver Solar-Thermal Power Systems

Review of Sodium Effects on Candidate Materials for Central Receiver Solar-Thermal Power Systems

Date: July 1979
Creator: Chopra, O. K.; Wang, J. Y. N. & Natesan, K.
Description: Available information on the corrosion behavior and mechanical properties of structural materials in a high-temperature sodium environment has been reviewed to compile a data base for selection of materials for advanced central-receiver solar-power systems, for which sodium is being considered as a heat-transfer fluid and thermal-storage medium. Candidate materials for this application (e.g., Types 304, 316, and 321 stainless steel, Alloy 800, and Fe-2 1/4 Cr-1Mo and Fe-9Cr-1Mo ferritic steels) have been used in the construction of various components for liquid-metal fast-breeder reactors in this country and abroad with considerable success. Requirements for additional information on material properties in a sodium environment are identified. The additional data coupled with more quantitative deformation models, failure criteria, and component design rules will further reduce uncertainties in the assessment of performance limits and component reliability in large sodium heat-transport systems.
Contributing Partner: UNT Libraries Government Documents Department
Studies of Nuclear Waste Migration in Geologic Media, Annual Report: October 1977-September 1978

Studies of Nuclear Waste Migration in Geologic Media, Annual Report: October 1977-September 1978

Date: July 1979
Creator: Argonne National Laboratory. Chemical Engineering Division.
Description: Annual report of the Argonne National Laboratory Chemical Engineering Division regarding studies of nuclear waste migration in geologic media. This report discusses research regarding nuclide migration and cesium absorption on limestone.
Contributing Partner: UNT Libraries Government Documents Department
Advanced Fuel Cell Development Progress Report: October-December 1978

Advanced Fuel Cell Development Progress Report: October-December 1978

Date: June 1979
Creator: Finn, P. A.; Ackerman, J. P.; Pierce, R. D.; Nelson, P. A. & Arons, R. M.
Description: Quarterly report discussing fuel cell research and development work at Argonne National Laboratory (ANL). This report describes efforts directed toward understanding and improving the components of molten-carbonate-electrolyte fuel cells operated at temperatures near 925 K.
Contributing Partner: UNT Libraries Government Documents Department
Decontamination of Metals containing Plutonium and Americium

Decontamination of Metals containing Plutonium and Americium

Date: June 1979
Creator: Argonne National Laboratory. Chemical Engineering Division.
Description: Evaluation of melt-slagging techniques as a decontamination and consolidation step for metals contaminated with oxides of plutonium and americium.
Contributing Partner: UNT Libraries Government Documents Department
Electromagnetic Boundary-Value Problems Based Upon a Modification of Residue Calculus and Function Theoretic Techniques

Electromagnetic Boundary-Value Problems Based Upon a Modification of Residue Calculus and Function Theoretic Techniques

Date: June 1979
Creator: Montgomerey, James Patrick & Chang, David C.
Description: None
Contributing Partner: UNT Libraries Government Documents Department