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1/12-Scale mixing interface visualization and buoyant particle release tests in support of Tank 241-SY-101 hydrogen mitigation

Description: In support of tank waste safety programs, visualization tests were performed in the 1/12-scale tank facility, using a low-viscosity simulant. The primary objective of the tests was to obtain video records of the transient jet-sludge interaction. The intent is that these videos will provide useful qualitative data for comparison with model predictions. Two tests were initially planned: mixing interface visualization (MIV) and buoyant particle release (BPR). Completion of the buoyant particle rel… more
Date: October 1, 1993
Creator: Eschbach, E. J. & Enderlin, C. W.
Item Type: Refine your search to only Report
open access

4 MW upgrade to the DIII-D fast wave current drive system

Description: The DIII-D fast wave current drive (FWCD) system is being upgraded by an additional 4 MW in the 30 to 120 MHz frequency range. This capability adds to the existing 2 MW 30 to 60 MHz system. Two new ABB transmitters of the type that are in use on the ASDEX-Upgrade tokamak in Garching will be used to drive two new water-cooled four-strap antennas to be installed in DIII-D in early 1994. The transmission and tuning system for each antenna will be similar to that now in use for the first 2 MW syste… more
Date: October 1, 1993
Creator: deGrassie, J. S.; Pinsker, R. I. & Cary, W. P.
Item Type: Refine your search to only Report
open access

A 140-element Ge detector fabricated using amorphous Ge blocking contacts

Description: A 140-element position-sensitive Ge detector has been fabricated as the prototype detector for the development of a monochromatic computed tomography system using synchrotron radiation. The detector was made in very few processing steps that included the use of amorphous Ge blocking contacts. The fabrication process and the results of testing the detector are described.
Date: October 1, 1993
Creator: Luke, P. N.; Pehl, R. H. & Dilmanian, F. A.
Item Type: Refine your search to only Article
open access

308 Building Zone I stabilization and confinement

Description: The 308 Building (Fast Flux Test Facility [FFTF] fuel supply) at the Hanford Site, located in Richland, Washington, is currently in transition to shutdown status. After shutdown, the facility will be maintained/surveilled and turned over to the U.S. Department of Energy (DOE) Office of Facility Transition and Management (EM-60) for utilization, remedial action, or decontamination and decommissioning (D&D). This may require that the facility be maintained in the shutdown mode for up to 30 years.… more
Date: October 1, 1993
Creator: Metcalf, I. L.; Schwartz, K. E.; Rich, J. W.; Benecke, M. W. & Rasmussen, D. E.
Item Type: Refine your search to only Article
open access

340 Facility compliance assessment

Description: This study provides an environmental compliance evaluation of the RLWS and the RPS systems of the 340 Facility. The emphasis of the evaluation centers on compliance with WAC requirements for hazardous and mixed waste facilities, federal regulations, and Westinghouse Hanford Company (WHC) requirements pertinent to the operation of the 340 Facility. The 340 Facility is not covered under either an interim status Part A permit or a RCRA Part B permit. The detailed discussion of compliance deficienc… more
Date: October 1, 1993
Creator: English, S. L.
Item Type: Refine your search to only Report
open access

1992-93 Results of geomorphological and field studies Volcanic Studies Program, Yucca Mountain Project

Description: Field mapping and stratigraphic studies were completed of the Black Tank volcanic center, which represents the southwestern most eruptive center in the Cima volcanic field of California. The results of this mapping are presented. Contacts between volcanic units and geomorphic features were field checked, incorporating data from eight field trenches as well as several exposures along Black Tank Wash. Within each of the eight trenches, logs were measured and stratigraphic sections were described.… more
Date: October 1, 1993
Creator: Wells, S.G.
Item Type: Refine your search to only Report
open access

1993 annual report for the Phaedrus-T RF current drive experiments

Description: After a series of antenna modifications and a program of optimizing our Boronization procedures, we have succeeded in coupling 300 kill of rf power to the plasma. Thomson Scattering shows a 20--60% increase in core T{sub e}, and constitutes experimental evidence that the waves are interacting with the electron population. Beam Emission Spectroscopy (BES) data show that the power is deposited in the core and at the edge as predicted by theoretical modeling. Ninety degree phasing of the antenna c… more
Date: October 1, 1993
Creator: Hershkowitz, N.
Item Type: Refine your search to only Report
open access

1993 Wholesale Power and Transmission Rate Schedules.

Description: Bonneville Power Administration 1993 Wholesale Power Rate Schedules and General Rate Schedule Provisions and 1993 Transmission Rate Schedules and General Transmission Rate Schedule Provisions, contained herein, were approved on an interim basis effective October 1, 1993. These rate schedules and provisions were approved by the Federal Energy Commission, United States Department of Energy, in September, 1993. These rate schedules and provisions supersede the Administration`s Wholesale Power Rate… more
Date: October 1, 1993
Creator: Administration, US Bonneville Power
Item Type: Refine your search to only Report
open access

Ac losses for the self field of an ac transport current with a dc transport current offset in high {Tc} superconducting magnet coils for MagLev application

Description: Although much research has been conducted concerning the losses of high-{Tc} superconductors, very little has concentrated on the self-field losses in an actual magnet arrangement. The coils studied in this work were designed for use as actual magnets in an industrial application. Self field loss measurements were made upon tape-wound 2223 superconducting helix coils. The self-field losses were produced by an AC transport current with a DC transport current offset. Losses were taken for single,… more
Date: October 1, 1993
Creator: Koosh, V. F.
Item Type: Refine your search to only Report
open access

Accelerated screening methods for determining chemical and thermal stability of refrigerant-lubricant mixtures: Part 2, Experimental comparison and verification of methods. Quarterly technical progress report, 1 March 1993--30 June 1993

Description: Initial research focused on conductivity measurements to perform in heated situ degradation measurements of CFC-12/mineral oil and HCFC-22/mineral oil mixtures at 175C in sealed glass tubes. Tungsten rods were sealed into round bottoms of the sealed tubes to provide electrical connections for in situ conductivity measurements. Steel, Cu and W were used as catalysts as well as conductivity probes. Conductivity measurements have been made with both ac and dc voltage inputs. Preliminary results in… more
Date: October 1, 1993
Creator: Kauffman, R.
Item Type: Refine your search to only Report
open access

Accelerator-based neutrino oscillation searches

Description: This paper attempts to summarize the neutrino oscillation section of the Workshop on Future Directions in Particle and Nuclear Physics at Multi-GeV Hadron Beam Facilities. There were very lively discussions about the merits of the different oscillation channels, experiments, and facilities, but we believe a substantial consensus emerged. First, the next decade is one of great potential for discovery in neutrino physics, but it is also one of great peril. The possibility that neutrino oscillatio… more
Date: October 1, 1993
Creator: Whitehouse, D. A.; Rameika, R. & Stanton, N.
Item Type: Refine your search to only Article
open access

Accelerator mass spectrometry in biomedical research

Description: Biological effects occur in natural systems at chemical concentrations of parts per billion (1:10{sup 9}) or less. Affected biomolecules may be separable in only milligram or microgram quantities. Quantification at attomole sensitivity is needed to study these interactions. AMS measures isotope concentrations to parts per 10{sup 13--15} on milligram-sized samples and is ideal for quantifying long-lived radioisotopic labels that are commonly used to trace biochemical pathways in natural systems.… more
Date: October 20, 1993
Creator: Vogel, J. S. & Turteltaub, K. W.
Item Type: Refine your search to only Article
open access

Access to DIII-D data located in multiple files and multiple locations

Description: The General Atomics DIII-D tokamak fusion experiment is now collecting over 80 MB of data per discharge once every 10 min, and that quantity is expected to double within the next year. The size of the data files, even in compressed format, is becoming increasingly difficult to handle. Data is also being acquired now on a variety of UNIX systems as well as MicroVAX and MODCOMP computer systems. The existing computers collect all the data into a single shot file, and this data collection is takin… more
Date: October 1, 1993
Creator: McHarg, B. B. Jr.
Item Type: Refine your search to only Report
open access

Accounting for time-varying vadose-zone water fluxes caused by infiltration caps using the MEPAS transport, exposure, and risk assessment model

Description: The Multimedia Environmental Pollutant Assessment System (MEPAS) is an objective, scientific methodology to assess and prioritize hazardous chemical and radionuclide waste disposal sites based on a limited amount of site information. The vadose zone/groundwater transport module (RADCON) of MEPAS was enhanced to simulate scenarios where water-infiltration barriers (caps) have been emplaced over contaminated sites. The computer code was modified to accommodate three periods of constant water flux… more
Date: October 1, 1993
Creator: Streile, G. P. & Stroh, J. L.
Item Type: Refine your search to only Report
open access

Accuracy, precision, and lower detection limits (a deficit reduction approach)

Description: The evaluation of the accuracy, precision and lower detection limits of the determination of trace radionuclides in environmental samples can become quite sophisticated and time consuming. This in turn could add significant cost to the analyses being performed. In the present method, a {open_quotes}deficit reduction approach{close_quotes} has been taken to keep costs low, but at the same time provide defensible data. In order to measure the accuracy of a particular method, reference samples are… more
Date: October 12, 1993
Creator: Bishop, C. T.
Item Type: Refine your search to only Article
open access

Actinide Phosphonate Complexes in Aqueous Solutions

Description: Complexes formed by actinides with carboxylic acids, polycarboxylic acids, and aminopolycarboxylic acids play a central role in both the basic and process chemistry of the actinides. Recent studies of f-element complexes with phosphonic acid ligands indicate that new ligands incorporating doubly ionizable phosphonate groups (-PO{sub 3}H{sub 2}) have many properties which are unique chemically, and promise more efficient separation processes for waste cleanup and environmental restoration. Simpl… more
Date: October 1993
Creator: Nash, K. L.
Item Type: Refine your search to only Article
open access

Active Layer Dynamics and Arctic Hydrology and Meteorology. Final Report

Description: Man`s impact on the environment is increasing with time. To be able to evaluate anthropogenic impacts on an ecosystems, it is necessary first to understand all facets of how the ecosystems works: what the main processes (physical, biological, chemical) are, at what rates they proceed, and how they can be manipulated. Arctic ecosystems are dominated by physical processes of energy exchange. This project has concentrated on a strong program of hydrologic and meteorologic data collection, to bette… more
Date: October 1, 1993
Item Type: Refine your search to only Report
open access

Activity testing of fine-particle size, iron catalysts for coal liquefaction

Description: The use of fine-particle size (< 40 nm) unsupported catalysts in direct coal liquefaction may result in improved economics due to possible enhanced yields of desired products, the potential for decreasing reaction severity, and the possibility of using less catalyst. Sandia has developed a standard testing procedure for evaluating and comparing the fine-particle catalysts. The test procedure uses phenanthrene as the reaction solvent, the DECS-17 Blind Canyon Coal, and a statistical experimental… more
Date: October 1, 1993
Creator: Stohl, F. V.; Diegert, K. V. & Gugliotta, T. P.
Item Type: Refine your search to only Article
open access

Adaptive optimization and control using neural networks

Description: Recent work has demonstrated the ability of neural-network-based controllers to optimize and control machines with complex, non-linear, relatively unknown control spaces. We present a brief overview of neural networks via a taxonomy illustrating some capabilities of different kinds of neural networks. We present some successful control examples, particularly the optimization and control of a small-angle negative ion source.
Date: October 22, 1993
Creator: Mead, W. C.; Brown, S. K.; Jones, R. D.; Bowling, P. S. & Barnes, C. W.
Item Type: Refine your search to only Article
open access

Adaptive path planning in changing environments

Description: Path planning needs to be fast to facilitate real-time robot programming. Unfortunately, current planning techniques are still too slow to be effective, as they often require several minutes, if not hours of computation. To overcome this difficulty, we present an adaptive algorithm that uses previous experience to speed up future performance. It is a learning algorithm suitable for incrementally-changing environments such as those encountered in manufacturing of evolving products and waste-site… more
Date: October 1, 1993
Creator: Chen, Pang C.
Item Type: Refine your search to only Report
open access

Adaptive sampling program support for expedited site characterization

Description: Expedited site characterizations offer substantial savings in time and money when assessing hazardous waste sites. Key to some of these savings is the ability to adapt a sampling program to the ``real-time`` data generated by an expedited site characterization. This paper presents a two-prong approach to supporting adaptive sampling programs: a specialized object-oriented database/geographical information system for data fusion, management and display; and combined Bayesian/geostatistical metho… more
Date: October 1, 1993
Creator: Johnson, R.
Item Type: Refine your search to only Article
open access

Additional Losses in High Purity Niobium Cavities related to Slow Cooldown and Hydrogen Segregation

Description: Several years ago the SRF--community was unpleasantly surprised by the discovery that superconducting RF-cavities made from high purity niobium showed significant degradations of the Q-values when kept for longer periods of time at intermediate temperatures around 100 K. The first temperature map taken on such a degraded cavity showed a rather uniform distribution of the additional losses. This fact and the roughly 100 K holding temperature resulted in the hypothesis of precipitation of hydride… more
Date: October 1, 1993
Creator: Halbritter, J.; Kneisel, Peter & Saito, Kenji
Item Type: Refine your search to only Article
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