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Formulation and numerical analysis of nonisothermal multiphase flow in porous media

Description: A mathematical formulation is presented for describing the transport of air, water and energy through porous media. The development follows a continuum mechanics approach. The theory assumes the existence of various average macroscopic variables which describe the state of the system. Balance equations for mass and energy are formulated in terms of these macroscopic variables. The system is supplemented with constitutive equations relating fluxes to the state variables, and with transport prope… more
Date: June 1, 1995
Creator: Martinez, M.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

New sensor for measurement of low air flow velocity. Phase I final report

Description: The project described here is the Phase I feasibility study of a two-phase program to integrate existing technologies to provide a system for determining air flow velocity and direction in radiation work areas. Basically, a low air flow sensor referred to as a thermocouple flow sensor has been developed. The sensor uses a thermocouple as its sensing element. The response time of the thermocouple is measured using an existing in-situ method called the Loop Current Step Response (LCSR) test. The … more
Date: August 1, 1995
Creator: Hashemian, H.M.; Hashemian, M. & Riggsbee, E.T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Near-drift thermal analysis including combined modes of conduction, convection, and radiation

Description: The performance of waste packages containing high-level nuclear wastes at underground repositories such as the potential repository at Yucca Mountain, Nevada, depends, in part, on the thermodynamic environment immediately surrounding the buried waste packages. For example, degradation of the waste packages can be caused by corrosive and microbial processes, which are influenced by both the relative humidity and temperature within the emplacement drifts. In this paper, the effects of conduction,… more
Date: December 31, 1995
Creator: Ho, C.K. & Francis, N.D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

User`s guide for PLTWIND Version 1.0: PC-based software for generating plots of monitored wind data and gridded wind fields for Hanford emergency response applications

Description: This document is a user`s guide for the PLoT Near-Surface WIND (PLTWIND) modeling system. PLTWIND is a personal-computer-based software product designed to produce graphical displays of Hanford wind observations and model-generated wind fields. The real-time wind data processed by PLTWIND are acquired from the mainframe computer system at the Hanford Meteorology Station and copied to PLTWIND systems by the Hanford Local Area Network (HLAN). PLTWIND is designed fbr operation on an IBM-compatible… more
Date: September 1, 1995
Creator: Glantz, C. S. & Burk, K. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Diesel emissions and ventilation exhaust sampling in the North Ramp of the Yucca Mountain Project Exploratory Studies Facility

Description: A series of ventilation experiments have been performed to assess the potential retention of diesel exhaust constituents in the North Ramp of the Yucca Mountain Site Characterization Project`s Exploratory Studies Facility (ESF). Measurements were taken to help evaluate the potential impact of retained diesel exhaust constituents on future in-situ experiments and long-term waste isolation. Assessment of the diesel exhaust retention in the ESF North Ramp required the measurement of air velocities… more
Date: November 1, 1995
Creator: George, J. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Atmospheric Dispersion Estimates in the Vicinity of Buildings

Description: A model describing atmospheric dispersion in the vicinity of buildings was developed for the U.S. Nuclear Regulatory Commission (NRC) in the late 1980s. That model has recently undergone additional peer review. The reviewers identified four areas of concern related to the model and its application. This report describes revisions to the model in response to the reviewers concerns. Model revision involved incorporation of explicit treatment of enhanced dispersion at low wind speeds in addition t… more
Date: January 1, 1995
Creator: Ramsdell, J. V. Jr. & Fosmire, C. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Formation of thallium based high temperature superconductors using aerosol flow reacted precursor powders

Description: Highly anisotropic particles of various thallium containing superconductors were grown. The Tl free precursor powders with the nominal compositions Ba{sub 1}Ca{sub 2}Cu{sub 3}Ag{sub 0.37}O{sub 6} and Ba{sub 2}Ca{sub 2}Cu{sub 3}Ag{sub 0.37}O{sub 7} were prepared using an aerosol flow reactor. These precursor powders were post-annealed in 0.1 atm oxygen at 700{degree}C for 4h to reduce the carbon present, and subsequently mixed with Tl{sub 2}O{sub 3} (typical composition of Tl{sub x}; x = 0.6 {mi… more
Date: February 1, 1995
Creator: Brynestad, J.; Paranthaman, M.; Goyal, A.; Heatherly, D. E. & Kroeger, D. M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Aerosol characteristics in the offgas from a pilot-scale sluicing operation

Description: A pilot-scale study was performed to simulate conditions anticipated during sluicing operations to retrieve waste in single-shell Tank 241-C-106 at the US Department of Energy`s Hanford Site in southeastern Washington. The objective of the study was to identify and characterize the potential aerosol source term at the inlet of the headspace exhaust ventilation system during sluicing operations. The information is needed to support decisions for components to be used in the full-scale operation.… more
Date: January 1, 1995
Creator: Ligotke, M. W.; Whyatt, G. A. & Beckette, M. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Mesoscale Modeling of the Inland Nocturnal Sea Breeze

Description: The mesoscale sea breeze has important consequences for many densely populated coastal environments, including convection initiation, aviation safety, and air quality. The sea breeze characteristics before and after sunset are markedly different (Sha et al 1993). A gravity current will form during the early afternoon due to the relatively large density difference between the land and sea air. During the afternoon, as the lighter land air is forced upward by the cooler dense sea air, Kelvin-Helm… more
Date: September 12, 1995
Creator: Kurzeja, R. J. & Buckley, R. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Heat transfer studies. Quarterly report

Description: Nitrogen gas has been replaced by room air in the extension of multi-phase models to sub-residual saturation experiments on drying. The TOUGH2 code has been used to simulate the same problem with the identical boundary conditions. A constant heat flux boundary condition on the heater has been performed in the repository drift experiment. The desired constant heat flux can produce a steady-state heater temperature ({approx}238{degrees}C) close to the constant heater surface temperature used befo… more
Date: April 20, 1995
Creator: Boehm, R.; Chen, Y.T. & Ma, L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Engineering task plan for BX/BY compressor upgrade

Description: This Engineering Task Plan outlines the remaining work to be completed for the BX/BY Instrument Air upgrade. Initial work efforts were guided by Engineering Work Plan, ``BX-BY Compressor Upgrade`` dated 1-25-93 (see Attachment A) which is provided for information. The overall engineering task is to provide a permanent replacement for the instrument air supply system for the 241-BX/BY Tank Farms. The existing system consists of a 25 horsepower Worthington non-lube compressor and an Oriad air dry… more
Date: February 7, 1995
Creator: Strand, R.G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Modeling of a sinusoidal lobed injector: Vorticity and concentration fields for a cold flow

Description: In this report, we present a simple and somewhat preliminary numerical model of a sinusoidal lobed injector. The lobed (corrugated) injector is being considered by several investigators as a potentially efficient device to mix fuel and air for combustion purposes. In this configuration, air flows parallel to the troughs and valleys of corrugations which grow in amplitude in the stream-wise direction. These ramped corrugations produce stream-wise vortices which enhance the downstream mixing. For… more
Date: December 1, 1995
Creator: Strickland, J.H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Improved modelling of HVAC system/envelope inteactions in residential buildings

Description: General building energy simulation programs do not typically simulate interactions between HVAC systems and building envelopes. For this reason, a simulation tool which includes interactions between duct systems, building envelopes, and heating and cooling appliances in residential buildings has been developed. The simulation tool uses DOE- 2 (to model space conditioning loads and zone temperatures), COMIS (an airflow network solver), and a model of duct leakage and conduction losses. Three aug… more
Date: March 1, 1995
Creator: Modera, M.P. & Treidler, B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Intercooler Flow Path for Gas Turbines: CFD Design and Experiments

Description: The Advanced Turbine Systems (ATS) program was created by the U.S. Department of Energy to develop ultra-high efficiency, environmentally superior, and cost competitive gas turbine systems for generating electricity. Intercooling or cooling of air between compressor stages is a feature under consideration in advanced cycles for the ATS. Intercooling entails cooling of air between the low pressure (LP) and high pressure (HP) compressor sections of the gas turbine. Lower air temperature entering … more
Date: December 31, 1995
Creator: Agrawal, A. K.; Gollahalli, S. R. & Carter, F. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Air barriers for waste containment in the subsurface

Description: The increase of air saturation in a soil alters significantly its hydraulic characteristics by reducing its the relative permeability to liquids. This realization led to the concept that air injection could be used in the context of remedial strategies to create low permeability barriers to contaminated water and NAPL migration. Air offers a number of significant advantages as a barrier fluid: it is not a contaminant, already exists in the vadose zone, is abundant, easily available, free of cha… more
Date: April 1, 1995
Creator: Moridis, G.J. & Pruess, K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Limits on Annulus Air Outages in Types 1, 2, and 3 Waste Tanks

Description: An evaluation was performed on the impact of abnormal air flow conditions on the structural integrity of Types 1, 2, and 3 waste tanks. Warm, dry air in the annular space is necessary to preclude low temperature embrittlement and corrosive conditions for the carbon steel materials. For Type 1 and 2 tanks the annulus air system should be repaired within a month to minimize the potential for low temperature embrittlement and corrosive conditions, for Tanks 29-34, which are Type 3 tanks, it is rec… more
Date: April 12, 1995
Creator: Wiersma, B.J. & Sindelar, R. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The consequences of elevation characterization on simulations of drainage flows in mountain valleys

Description: Many important phenomena in mountain meteorology are sensitive to, or driven by, land surface characteristics. Thus, accurately representing surface-atmosphere interactions within an atmospheric model requires a realistic characterization of the land surface. Such a characterization must be based on data extracted from a geographical database and transformed so that it is consistent with the needs of the numerical model. In such a process, there are two major classes of error that must be under… more
Date: April 1, 1995
Creator: Walker, H. & Leone, J. M. Jr.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Conceptual design report: Nuclear materials storage facility renovation. Part 6, Alternatives study

Description: The Nuclear Materials Storage Facility (NMSF) at the Los Alamos National Laboratory (LANL) was a Fiscal Year (FY) 1984 line-item project completed in 1987 that has never been operated because of major design and construction deficiencies. This renovation project, which will correct those deficiencies and allow operation of the facility, is proposed as an FY 97 line item. The mission of the project is to provide centralized intermediate and long-term storage of special nuclear materials (SNM) as… more
Date: July 14, 1995
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Experimental study of vortex diffusers

Description: This report documents experimental research performed on vortex diffusers used in ventilation and air-conditioning systems. The main objectives of the research were (1) to study the flow characteristics of isothermal jets issuing from vortex diffusers, (2) to compare the vortex diffuser`s performance with that of a conventional diffuser, and (3) to prepare a report that disseminates the results to the designers of ventilation and air-conditioning systems. The researchers considered three diffus… more
Date: November 1, 1995
Creator: Shakerin, S. & Miller, P.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of a coal-fired combustion system for industrial processing heating applications: Appendix A. Phase 3 final report, November 1992--December 1994

Description: A three phase research and development program has resulted in the development and commercialization of a Cyclone Melting System (CMS{trademark}), capable of being fueled by pulverized coal, natural gas, and other solid, gaseous, or liquid fuels, for the vitrification of industrial wastes. The Phase 3 research effort focused on the development of a process heater system to be used for producing value added glass products from the vitrification of boiler/incinerator ashes and industrial wastes. … more
Date: September 26, 1995
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Wind Turbine Testing. Final Report.

Description: Los Alamos National Laboratory (LANL) is investigating concepts for removing heat from nuclear material storage units. One method which has been suggested is the use of wind turbine ventilators on the roofs of the units. An advantage of these devices is that it would require no power to operate them, and in this sense the system would be fail safe. The internal heat in the storage units would naturally cause air to rise through the ventilators and the usually prevailing winds which average abou… more
Date: January 1, 1995
Creator: Smith, Phillip R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

296-B-10 stack monitoring and sampling system annual system assessment report

Description: B Plant Administration Manual, requires an annual system assessment to evaluate and report the present condition of the sampling and monitoring system associated with stack 296-B-10 at B Plant. The ventilation system of WESF (Waste Encapsulation and Storage Facility) is designed to provide airflow patterns so that air movement throughout the building is from areas of lesser radioactivity to areas of greater radioactivity. All potentially contaminated areas are maintained at a negative pressure … more
Date: April 26, 1995
Creator: Ridge, T.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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