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Performance of concrete barriers in radioactive waste disposal in the unsaturated zone

Description: Concrete barriers are an important component of many designs for disposal of radioactive waste in the unsaturated zone. In order to evaluate the effectiveness of the concrete barriers performance assessment models representing the material degradation rates and transport properties must be developed. Models for evaluation of fluid flow and mass transport through partially failed concrete barriers located in the unsaturated zone are presented. Implications of the use of impermeable barriers desi… more
Date: September 14, 1989
Creator: Walton, J.C. (Idaho National Engineering Lab., Idaho Falls, ID (USA)) & Otis, M.D. (Science Applications International Corp., Idaho Falls, ID (USA))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Tentative design basis new 100 Area water plant embodying a close cooling water circuit

Description: The attached document includes a plot plan, flow diagram and delineation of basic assumptions upon which the report was developed. It summarizes the work which has been accomplished to date under RDA No. DC-6 in developing a recirculating water system to serve a new reactor. In order to proceed with the work under RDA No. DC-6 it has been necessary to make certain basic assumptions relative to the primary circuit requirements of RDA No. DC-3. These assumptions are explained in the report and ar… more
Date: November 14, 1951
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Test Results for Unrestrained Reactor, Gunbarrel-Nozzle Assemblies

Description: These tests were performed in accordance with a letter fran R. C. Breisch to J. R. Spink, May 7, 1962. An unrestrained gunbarrel condition was simulated for each of the standard process tube inlet assemblies for B,C and K type reactors. Primary objects of the testing were to obtain data on movement, pigtail damage, and effect on flow to the process tube in case of a Van Stone flange failure without key restraint of the gunbarrel. All test conditions were relative to actual conditions, but these… more
Date: February 14, 1963
Creator: Goff, J. M., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

D0 Silicon Upgrade: Liquid & Gas Nitrogen Line Sizing for D-Zero Upgrade

Description: This engineering note documents the calculations done to properly size the liquid/gas nitrogen piping system for the D-Zero refrigerator, solenoid, and VLPC upgrade. See the line sketch of the system on the next page. The sketch shows the chosen line sizes, estimated lengths of piping runs, estimated steady state flow rates and pressure drops for each pipe section. The raw calculations are attached as an appendix. The estimated steady state flow rates were developed in D-Zero EN-421, 'Helium an… more
Date: September 14, 1995
Creator: Rucinski, Russ
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Mechanistic Studies of Improved Foam EOR Processes

Description: The objective of this research is to widen the application of foam to enhanced oil recovery (EOR) by investigating fundamental mechanisms of foams in porous media. This research will lay the groundwork for more applied research on foams for improved sweep efficiency in miscible gas, steam and surfactant-based EOR. Task 1 investigates the pore-scale interactions between foam bubbles and polymer molecules. Task 2 examines the mechanisms of gas trapping, and interaction between gas trapping and fo… more
Date: June 14, 2004
Creator: Rossen, William R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Modeling Three-Dimensional Groundwater Flow and Advective Contaminant Transport at a Heterogeneous Mountainous Site in Support of Remediation Strategy

Description: A calibrated groundwater flow model for a contaminated site can provide substantial information for assessing and improving hydraulic measures implemented for remediation. A three-dimensional transient groundwater flow model was developed for a contaminated mountainous site, at which interim corrective measures were initiated to limit further spreading of contaminants. This flow model accounts for complex geologic units that vary considerably in thickness, slope, and hydrogeologic properties, a… more
Date: January 14, 2004
Creator: Zhou, Quanlin; Birkholzer, Jens T.; Javandel, Iraj & Jordan, Preston D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

EXPERIMENTS ON CAKE DEVELOPMENT IN CROSSFLOW FILTRATION FOR HIGH LEVEL WASTE

Description: Crossflow filtration is a key process step in many operating and planned waste treatment facilities to separate undissolved solids from supernate slurries. This separation technology generally has the advantage of self cleaning through the action of wall shear stress, which is created by the flow of waste slurry through the filter tubes. However, the ability of filter wall self cleaning depends on the slurry being filtered. Many of the alkaline radioactive wastes are extremely challenging to fi… more
Date: April 14, 2011
Creator: Duignan, M. & Nash, C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

HCCI Combustion: Analysis and Experiments

Description: Homogeneous charge compression ignition (HCCI) is a new combustion technology that may develop as an alternative to diesel engines with high efficiency and low NOx and particulate matter emissions. This paper describes the HCCI research activities being currently pursued at Lawrence Livermore National Laboratory and at the University of California Berkeley. Current activities include analysis as well as experimental work. On analysis, we have developed two powerful tools: a single zone model an… more
Date: May 14, 2001
Creator: Aceves, Salvador M.; Flowers, Daniel L.; Martinez-Frias, Joel; Smith, J. Ray; Dibble, Robert; Au, Michael et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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