Design of the Prototype Low Energy Beam Transport Line for theSpallation Neutron Source (open access)

Design of the Prototype Low Energy Beam Transport Line for theSpallation Neutron Source

None
Date: January 2, 1999
Creator: Cheng, D. W.; Gough, R. A.; Hoff, M. D.; Keller, R.; Leitner, M. A.; Leung, K. N. et al.
Object Type: Article
System: The UNT Digital Library
D0 HVAC System Heat Pump Controller Programming, Networking, and Operating Information (open access)

D0 HVAC System Heat Pump Controller Programming, Networking, and Operating Information

The purpose of this engineering note is to provide the necessary information to setup, program, and network the Electronic Systems USA Heat Pump Controller with the LON network card and Intellution Fix32 to operate properly within the HVAC system at D-Zero. The heat pump controllers are used for local temperature control of the office environments on the fifth and six floors of D-Zero. Heat pump units 1-6 are located in the ceiling of the sixth floor. Heat pump units 7-12 are found in the fifth floor ceiling. Heat pump unit 13 is in the Southeast corner of the fifth floor. Prior to installation the heat pump controller must be properly prepared to operate correctly in the HVAC system. Each heat pump unit must contain firmware (software) version 1.31 to operate properly on the network. Controllers with version 1.30 will not be able to communicate over the LON network. The manufacturer can only update the firmware version. Before installation a series of heat pump setpoints must be manually set using the Intelligent Stat. Connect the Intelligent Stat via the serial cable or wired connection.
Date: December 2, 1999
Creator: Anderson, B.
Object Type: Report
System: The UNT Digital Library
Kootenai River Fisheries Investigations : Rainbow Trout Recruitment : Period Covered: 1997. (open access)

Kootenai River Fisheries Investigations : Rainbow Trout Recruitment : Period Covered: 1997.

The objective of this study was to determine if juvenile production is limiting the population of rainbow trout Oncorbynchus mykiss in the Idaho reach of the Kootenai River. We used snorkeling and electrofishing techniques to estimate juvenile rainbow trout abundance in, and outmigration from, the Deep, Boulder, and Myrtle creek drainages in Idaho. The total population estimates for the three drainages estimated in 1997 were 30,023; 763; and 235; respectively. A rotary-screw trap was utilized to capture juvenile outmigrants for quantification of age at outmigration and total outmigration from the Deep Creek drainage to the Kootenai River. The total outmigrant estimate for 1997 from the Deep Creek drainage was 38,206 juvenile rainbow trout. Age determination based largely on scales suggests that most juvenile rainbow trout outmigration from the Deep Creek drainage occurs at age-l, during the spring runoff period. Forty-three adult rainbow trout captured in the Deep Creek drainage were tagged with $10.00 reward T-bar anchor tags in 1997. A total of three of these fish were harvested, all in Kootenay Lake, British Columbia. This suggests the possibility of an adfluvial component in the spawning population of the Deep Creek drainage.
Date: February 2, 1999
Creator: Downs, Chris
Object Type: Report
System: The UNT Digital Library
Dose Calculations for the Co-Disposal WP-of HLW-Glass and the Triga SNF (open access)

Dose Calculations for the Co-Disposal WP-of HLW-Glass and the Triga SNF

This calculation is prepared by the Monitored Geologic Repository (MGR) Waste Package Operations (WPO). The purpose of this calculation is to determine the surface dose rates of a codisposal waste package (WP) containing a centrally located Department of Energy (DOE) standardized 18-in. spent nuclear fuel (SNF) canister, loaded with the TRIGA (Training, Research, Isotopes, General Atomics) SNF. This canister is surrounded by five 3-m long canisters, loaded with Savannah River Site (SRS) high-level waste (HLW) glass. The results are to support the WP design and radiological analyses.
Date: August 2, 1999
Creator: Radulescu, G.
Object Type: Report
System: The UNT Digital Library
Sepradyne/Reduce High Vacuum Thermal Process for Destruction of Dioxins in Ineel/Werf Fly Ash. (open access)

Sepradyne/Reduce High Vacuum Thermal Process for Destruction of Dioxins in Ineel/Werf Fly Ash.

This study investigated the use of an indirectly heated, high temperature (900 C), high vacuum (28'' Hg) rotary kiln, developed and patented by Raduce, Inc. (subsidiary of Sepradyne Corp.), to treat a dioxin contaminated mixed waste incinerator ash from the Idaho National Engineering Lab (INEEL) Waste Experimental Reduction Facility (WERF). A 500 cm{sup 3} bench-scale rotary vacuum thermal desorption and destruction unit (DDU) was used at Brookhaven National Laboratory (BNL) to demonstrate this thermal treatment process. Dioxins and furans were successfully decomposed at both low (450 C) and high (700-800 C) temperature regimes. In addition, substantial volume and mass reduction of the ash was achieved. Stabilization of the nonvolatile residues by a post-treatment encapsulation process may be required to reduce the leachability of RCRA metals to levels below the EPA Toxicity Characteristic Leaching Procedure (TCLP) requirements.
Date: August 2, 1999
Creator: Adams, J. W.; Kalb, P. D. & Malkmus, D. B.
Object Type: Report
System: The UNT Digital Library
Development of Alkaline Oxidative Dissolution Methods for Chromium (III) Compounds Present in Hanford Site Tank Sludges (open access)

Development of Alkaline Oxidative Dissolution Methods for Chromium (III) Compounds Present in Hanford Site Tank Sludges

The high-level radioactive waste sludge in the underground storage tanks at the Hanford Site contains various chromium(III)solid phases. Dissolution and removal of chromium from tank waste sludges is desirable prior to high-level waste vitrification because increased volume is required to incorporate the residual chromium. Unfortunately, dissolution of chromium from the sludge to form Cr(OH){sub 4}{sup {minus}} through treatment with heated NaOH solution (also used to dissolve aluminum phases and metathesize phosphates to sodium salts) generally has been unsuccessful in tests with both simulated and genuine Hanford waste sludges. Oxidative dissolution of the Cr(III) compounds to form soluble chromate has been proposed as an alternative chromium solid phase dissolution method and results of limited prior testing have been reported.
Date: July 2, 1999
Creator: Krot, N. N.; Shilov, V. P.; Fedoseev, A. M.; Budantseva, N. A.; Nikonov, M. V.; Yusov, A. B. et al.
Object Type: Report
System: The UNT Digital Library
Map of the Physical Sciences (open access)

Map of the Physical Sciences

Various efforts to map the structure of science have been undertaken over the years. Using a new tool, VxInsight{trademark}, we have mapped and displayed 3000 journals in the physical sciences. This map is navigable and interactively reveals the structure of science at many different levels. Science mapping studies are typically focused at either the macro-or micro-level. At a macro-level such studies seek to determine the basic structural units of science and their interrelationships. The majority of studies are performed at the discipline or specialty level, and seek to inform science policy and technical decision makers. Studies at both levels probe the dynamic nature of science, and the implications of the changes. A variety of databases and methods have been used for these studies. Primary among databases are the citation indices (SCI and SSCI) from the Institute for Scientific Information, which have gained widespread acceptance for bibliometric studies. Maps are most often based on computed similarities between journal articles (co-citation), keywords or topics (co-occurrence or co-classification), or journals (journal-journal citation counts). Once the similarity matrix is defined, algorithms are used to cluster the data.
Date: July 2, 1999
Creator: Boyack, Kevin W.
Object Type: Article
System: The UNT Digital Library
CUB DI (Deionization) column control system (open access)

CUB DI (Deionization) column control system

For the old MR (Main Ring), deionization was done with two columns in CUB, using an ion exchange process. Typically 65 GPM of LCW flew through a column, and the resistivity was raised from 3 Mohm-cm to over 12 Mohm-cm. After a few weeks, columns lost their effectiveness and had to be regenerated in a process involving backwashing and adding hydrochloric acid and sodium hydroxide. For normal MR operations, LCW returned from the ring and passed through the two columns in parallel for deionization, although the system could have been operated satisfactorily with only one in use. A 3000 gallon reservoir (the Spheres) provided a reserve of LCW for allowing water leaks and expansions in the MR. During the MI (Main Injector) construction period, the third DI column was added to satisfy requirements for the MI. When the third column was added, the old regeneration controller was replaced with a new controller based on an Allen-Bradley PLC (i.e., SLC-5/04). The PLC is widely used and well documented, and therefore it may allow us to modify the regeneration programs in the future. In addition to the above regeneration controller, the old control panels (which were used to manipulate pumps and valves …
Date: July 2, 1999
Creator: Seino, K. C.
Object Type: Report
System: The UNT Digital Library
In situ microbial volatilization of selenium in soils: A case history (open access)

In situ microbial volatilization of selenium in soils: A case history

A pilot-scale field experiment has been conducted since 1990 to test the effectiveness of microbial volatilization in removing selenium (Se) from soils contaminated with agricultural drainage water. The experiment, in which only irrigation and aeration were employed to enhance microbial processes, was designed to measure all major Se fluxes, including not only selenium loss via volatilization, but also advection with infiltrating rainwater, evapotranspirative transport, and plant uptake. The goal was to account for the total Se mass balance and address questions as to the significance of microbial volatilization relative to other fluxes. Although data collected from 1990 to 1994 showed decreases of Se concentrations in the top soil, subsequent data demonstrated that advective Se fluxes due to rainwater infiltration and evapotranspiration are largely responsible for the observed changes. Se volatilization was measured to account for an annual loss of only about 1%, with volatilization rates decreasing significantly with time, presumably due to the depletion of soil organic carbon. The integrated results of this project demonstrate the advantages and even necessity of an inter-disciplinary and multi-phase approach to evaluating the effectiveness of bioremediation strategies. Extreme caution needs to be taken in interpreting early results; long-term data collection and follow-up are indispensable.
Date: January 2, 1999
Creator: Zawislanski, Peter T.; Benson, Sally M.; Jayaweera, Gamani R.; Wu, L. & Frankenberger, William T.
Object Type: Article
System: The UNT Digital Library
Recent results from the Tevatron fixed target and collider experiments (open access)

Recent results from the Tevatron fixed target and collider experiments

We present a review of recent QCD related results from the Fermilab Tevatron fixed target and collider experiments. Topics include jet and boson production, W boson and top quark mass measurements, and studies of CP violation.
Date: July 2, 1999
Creator: Gerber, Cecilia E.
Object Type: Article
System: The UNT Digital Library
Inclusive jets at the Tevatron (open access)

Inclusive jets at the Tevatron

Results from CDF and D0 collaborations on the inclusive jet cross sections at 1800 and 630 GeV and strong coupling constant are presented. The statistical uncertainties are significantly reduced relative to the previous results and experimental systematic uncertainties are comparable with the uncertainties in the theoretical predictions. Despite observed discrepancies with theory, which could be accommodated by modifications of parton distribution functions, the inclusive jet cross sections can be described by perturbative Quantum Chromodynamics.
Date: July 2, 1999
Creator: Mesropian, C.
Object Type: Article
System: The UNT Digital Library
Tank 241-AZ-102 Privatization Push Mode Core Sampling and Analysis Plan (open access)

Tank 241-AZ-102 Privatization Push Mode Core Sampling and Analysis Plan

This sampling and analysis plan (SAP) identifies characterization objectives pertaining to sample collection, laboratory analytical evaluation, and reporting requirements for samples obtained from tank 241-AZ-102. The purpose of this sampling event is to obtain information about the characteristics of the contents of 241-AZ-102 required to satisfy the Data Quality Objectives For TWRS Privatization Phase I: Confirm Tank TIS An Appropriate Feed Source For High-Level Waste Feed Batch X(HLW DQO) (Nguyen 1999a), Data Quality Objectives For TWRS Privatization Phase 1: Confirm Tank TIS An Appropriate Feed Source For Low-Activity Waste Feed Batch X (LAW DQO) (Nguyen 1999b), Low Activity Waste and High Level Waste Feed Data Quality Objectives (L&H DQO) (Patello et al. 1999) and Characterization Data Needs for Development, Design, and Operation of Retrieval Equipment Developed through the Data Quality Objective Process (Equipment DQO) (Bloom 1996). The Tank Characterization Technical Sampling Basis document (Brown et al. 1998) indicates that these issues, except the Equipment DQO apply to tank 241-AZ-102 for this sampling event. The Equipment DQO is applied for shear strength measurements of the solids segments only. Poppiti (1999) requires additional americium-241 analyses of the sludge segments. Brown et al. (1998) also identify safety screening, regulatory issues and provision of …
Date: August 2, 1999
Creator: Rasmussen, J. H.
Object Type: Report
System: The UNT Digital Library
Fisher Helium Purge Flow Control Valve and Relay (open access)

Fisher Helium Purge Flow Control Valve and Relay

Fisher-Helium Purge Flow Control Valve and Relay.
Date: July 2, 1999
Creator: Van Katwijk, Carl
Object Type: Report
System: The UNT Digital Library
EFFECT OF HEATING RATE ON THE THERMODYNAMIC PROPERTIES OF PULVERIZED COAL (open access)

EFFECT OF HEATING RATE ON THE THERMODYNAMIC PROPERTIES OF PULVERIZED COAL

This semi-annual technical progress report describes work performed under DOE Grant No. DE-FG22-96PC96224 during the period March 24, 1999 to September 23, 1999 which covers the last (sixth) six months of the project. During this reporting period, extraction of devolatilization time-scales and temperature data at these time-scales analyzing the high-speed films taken during the experiments was complete. Also a new thermodynamic model was developed to predict the heat transfer behavior for coal particles subjected to a range of heating rates using one approach based on the analogy of polymers. Sensitivity analyses of this model suggest that bituminous coal particles behave like polymers during rapid heating on the order of 10{sup 4}-10{sup 7} K/s. At these heating rates during the early stages within the first few milliseconds of heating time, the vibrational part of the heat capacity of the coal molecules appears to be still frozen but during the transition from heat-up to devolatization, the heat capacity appears to attain a sudden jump in its value as in the case of polymers. There are few data available in the coal literature for 10{sup 2}-10{sup 3} K/s obtained by UTRC in their previous studies. These data were obtained for a longer heating …
Date: November 2, 1999
Creator: Sampath, Ramanathan
Object Type: Report
System: The UNT Digital Library
Whitey SCHe Ball Valves Provide Test Port Isolation (open access)

Whitey SCHe Ball Valves Provide Test Port Isolation

None
Date: August 2, 1999
Creator: Van Katwijk, Carl
Object Type: Report
System: The UNT Digital Library
Cold Vacuum Drying facility sanitary sewage collection system design description (SYS 27) (open access)

Cold Vacuum Drying facility sanitary sewage collection system design description (SYS 27)

This document describes the Cold Vacuum Drying Facility (CVDF) sanitary sewage collection system. The sanitary sewage collection system provides collection and storage of effluents and raw sewage from the CVDF to support the cold vacuum drying process. This system is comprised of a sanitary sewage holding tank and pipes for collection and transport of effluents to the sanitary sewage holding tank.
Date: July 2, 1999
Creator: PITKOFF, C.C.
Object Type: Report
System: The UNT Digital Library
Etching Effects During the Chemical Vapor Deposition of (100) Diamond (open access)

Etching Effects During the Chemical Vapor Deposition of (100) Diamond

Current theories of CVD growth on (100) diamond are unable to account for the numerous experimental observations of slow-growing, locally smooth (100)(2x1) films. In this paper they use quantum mechanical calculations of diamond surface thermochemistry and atomic-scale kinetic Monte Carlo simulations of deposition to investigate the efficacy of preferential etching as a mechanism that can help to reconcile this discrepancy. This etching mechanism allows for the removal of undercoordinated carbon atoms from the diamond surface. In the absence of etching, simulated growth on the (100)(2x1) surface is faster than growth on the (110) and (111) surfaces, and the (100) surface is atomically rough. When etching is included in the simulations, the (100) growth rates decrease to values near those observed experimentally, while the rates of growth on the other surfaces remain largely unaffected and similar to those observed experimentally. In addition, the etching mechanism promotes the growth of smooth (100) surface regions in agreement with numerous scanning probe studies.
Date: August 2, 1999
Creator: Battaile, C. C.; Srolovitz, D. J.; Oleinik, I. I.; Pettifor, D. G.; Sutton, A. P.; Harris, S. J. et al.
Object Type: Article
System: The UNT Digital Library
Carboxylic Acid Modified [Ti({mu}-ONep)(Onep){sub 3}]{sub 2} Compounds. Syntheses, Characterizations, X-Ray Structures, and Implications for the Thin Film Densification of TiO{sub 2} from Ti{sub 3}({mu}{sub 3}-O)(O{sub 2}CH){sub 2}(ONep){sub 8}, etc. (open access)

Carboxylic Acid Modified [Ti({mu}-ONep)(Onep){sub 3}]{sub 2} Compounds. Syntheses, Characterizations, X-Ray Structures, and Implications for the Thin Film Densification of TiO{sub 2} from Ti{sub 3}({mu}{sub 3}-O)(O{sub 2}CH){sub 2}(ONep){sub 8}, etc.

None
Date: August 2, 1999
Creator: Boyle, Timothy J.; Tyner, Ryan P.; Alam, Todd M.; Scott, Brian L.; Ziller, Joseph W. & Potter, B.G. Jr.
Object Type: Article
System: The UNT Digital Library
Identification of Yield-Limiting Defects in a 0.5 Micron, Shallow Trench Isolation Technology (open access)

Identification of Yield-Limiting Defects in a 0.5 Micron, Shallow Trench Isolation Technology

During the development and qualification of a radiation-hardened, 0.5 {micro}m shallow trench isolation technology, several yield-limiting defects were observed. The 256K (32K x 8) static-random access memories (SRAMs) used as a technology characterization vehicle had elevated power supply current during wafer probe testing. Many of the die sites were functional, but exhibited quiescent power supply current (I{sub DDQ}) in excess of 100 {micro}A, the present limit for this particular SRAM. Initial electrical analysis indicated that many of the die sites exhibited unstable I{sub DDQ} that fluctuated rapidly. We refer to this condition as ''jitter.'' The I{sub DDQ} jitter appeared to be independent of temperature and predominantly associated with the larger 256K SRAMs and not as prevalent in the 16K SRAMs (on the same reticle set). The root cause of failure was found to be two major processing problems: salicide bridging and stress-induced dislocations in the silicon islands.
Date: August 2, 1999
Creator: Draper, Bruce L.; Headley, Thomas J.; Hembree, Charles E.; Henderson, Christopher L. & Soden, Jerry M.
Object Type: Article
System: The UNT Digital Library
IN DRIFT CORROSION PRODUCTS (open access)

IN DRIFT CORROSION PRODUCTS

As directed by a written development plan (CRWMS M&O 1999a), a conceptual model for steel and corrosion products in the engineered barrier system (EBS) is to be developed. The purpose of this conceptual model is to assist Performance Assessment Operations (PAO) and its Engineered Barrier Performance Department in modeling the geochemical environment within a repository drift, thus allowing PAO to provide a more detailed and complete in-drift geochemical model abstraction and to answer the key technical issues (KTI) raised in the NRC Issue Resolution Status Report (IRSR) for the Evolution of the Near-Field Environment (NFE) Revision 2 (NRC 1999). This document provides the conceptual framework for the in-drift corrosion products sub-model to be used in subsequent PAO analyses including the EBS physical and chemical model abstraction effort. This model has been developed to serve as a basis for the in-drift geochemical analyses performed by PAO. However, the concepts discussed within this report may also apply to some near and far-field geochemical processes and may have conceptual application within the unsaturated zone (UZ) and saturated zone (SZ) transport modeling efforts.
Date: December 2, 1999
Creator: Jolley, D.M.
Object Type: Report
System: The UNT Digital Library
Determination of Rock Mass Modulus Using the Plate Loading Method at Yucca Mountain, Nevada (open access)

Determination of Rock Mass Modulus Using the Plate Loading Method at Yucca Mountain, Nevada

A suite of plate loading tests has recently been conducted by Sandia National Laboratories at the Exploratory Studies Facility at Yucca Mountain, Nevada. Fielding of these in situ tests as well as other approaches undertaken for the determination of rock mass modulus are described. The various methodologies are evaluated and their data compared. Calculation by existing empirical methods and numerical modeling are compared to each other as well as to field data.
Date: August 2, 1999
Creator: Finley, R. E.; George, J. T. & Riggins, M.
Object Type: Article
System: The UNT Digital Library
Searches for new phenomena at the Tevatron: SUSY and technicolor (open access)

Searches for new phenomena at the Tevatron: SUSY and technicolor

We present some of the latest updated results on searches for physics beyond the Standard Model at the Tevatron Collider using the full Run 1 data sample of p{anti p} collisions at {radical}s = 1.8 TeV collected with the CDF and D0 detectors. Results are reported relative to searches for squarks and gluinos, scalar top and bottom quarks and superlight gravitino. 95% CL exclusion limits are presented for degenerate states of Technicolor particles {rho}<sub>T</sub> and {omega}<sub>T</sub>.
Date: July 2, 1999
Creator: Rolli, S.
Object Type: Article
System: The UNT Digital Library
Investigation of Rising-Sun Magnetrons Operated at Relativistic Voltages Using Three Dimensional Particle-in-Cell Simulations (open access)

Investigation of Rising-Sun Magnetrons Operated at Relativistic Voltages Using Three Dimensional Particle-in-Cell Simulations

This work is an attempt to elucidate effects that may limit efficiency in magnetrons operated at relativistic voltages (V {approximately} 500 kV). Three-dimensional particle-in-cell simulation is used to investigate the behavior of 14 and 22 cavity, cylindrical, rising-sun magnetrons. Power is extracted radially through a single iris located at the end of every other cavity. Numerical results show that in general output power and efficiency increase approximately linearly with increasing iris width (decreasing vacuum Q) until the total Q becomes too low for stable oscillation in the n-mode to be maintained. Beyond this point mode competition and/or switching occur and efficiency decreases. Results reveal that the minimum value of Q (maximum efficiency) that can be achieved prior to the onset of mode competition is significantly affected by the magnitude of the 0-space-harmonic of the {pi}-mode, a unique characteristic of rising-suns, and by the magnitude of the electron current density (space-charge effects). By minimizing these effects, up to 3.7 GW output power has been produced at an efficiency of 40%.
Date: August 2, 1999
Creator: Lemke, R. W.; Genoni, T. C. & Spencer, T. A.
Object Type: Article
System: The UNT Digital Library
Seismic Restraint Cable for SCHe Helium Bottles (open access)

Seismic Restraint Cable for SCHe Helium Bottles

None
Date: August 2, 1999
Creator: Van Katwijk, Carl
Object Type: Report
System: The UNT Digital Library