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in creator/contributor: "Nguyen, H.D."  
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APOLLO: A computer program for the calculation of chemical equilibrium and reaction kinetics of chemical systems

Description: Several of the technologies being evaluated for the treatment of waste material involve chemical reactions. Our example is the in situ vitrification (ISV) process where electrical energy is used to melt soil and waste into a ``glass like`` material that immobilizes and encapsulates any residual waste. During the ISV process, various chemical reactions may occur that produce significant amounts of products which must be contained and treated. The APOLLO program was developed to assist in predict… more
Date: November 1, 1991
Creator: Nguyen, H. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

APOLLO: A computer program for the calculation of chemical equilibrium and reaction kinetics of chemical systems

Description: Several of the technologies being evaluated for the treatment of waste material involve chemical reactions. Our example is the in situ vitrification (ISV) process where electrical energy is used to melt soil and waste into a glass like'' material that immobilizes and encapsulates any residual waste. During the ISV process, various chemical reactions may occur that produce significant amounts of products which must be contained and treated. The APOLLO program was developed to assist in predictin… more
Date: November 1, 1991
Creator: Nguyen, H. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Economic-engineering energy-demand model for the pulp and paper industry. Phase I report

Description: The first phase of a project to develop an economic-engineering energy demand model for the paper industry has been completed. The Phase I model has four components: (1) a paper demand submodel; (2) a pulp and paper process submodel; (3) a fuel-share submodel; and (4) an energy-conversion submodel. The report begins with a brief discussion of the structure and technology of the industry. After the details of the four submodels are presented, the results of the model are compared to historical d… more
Date: August 1, 1979
Creator: Reister, D.B.; Chern, W.S. & Nguyen, H.D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A combined Galerkin/collocation spectral method for transient solution of flow past a spherical droplet

Description: A spectral model, based on the stream function and vorticity, is developed in order to calculate the time-dependent solution of flow past a spherical droplet. Both Chebyshev and Legendre polynomials are used to expand the stream fiinction and vorticity in the radial and angular directions, respectively, along with the backward Euler approximation to advance in time. Consistent treatment of boundary conditions is made to resolve the lack of vorticity boundary conditions by means of the influence… more
Date: January 1, 1992
Creator: Nguyen, H. D.; Paik, S. & Chung, J. N.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A modeling study of water flow in the vadose zone beneath the Radioactive Waste Management Complex

Description: A modeling study was conducted for the purpose of gaining insight into the nature of water flow in the vadose zone beneath the Radioactive Waste Management Complex (RWMC). The modeling study focused on three specific hydrologic aspects: (1) relationship between meteorologic conditions and net infiltration, (2) water movement associated with past flooding events, and (3) estimation of water travel-times through the vadose zone. This information is necessary for understanding how contaminants may… more
Date: January 1, 1992
Creator: Baca, R. G.; Magnuson, S. O.; Nguyen, H. D. & Martian, P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Modeling of thermal plasma arc technology FY 1994 report

Description: The thermal plasma arc process is under consideration to thermally treat hazardous and radioactive waste. A computer model for the thermal plasma arc technology was designed as a tool to aid in the development and use of the plasma arc-Joule beating process. The value of this computer model is to: (a) aid in understanding the plasma arc-Joule beating process as applied to buried waste or exhumed buried waste, (b) help design melter geometry and electrode configuration, (c) calculate the process… more
Date: March 1, 1995
Creator: Hawkes, G. L.; Nguyen, H. D.; Paik, S. & McKellar, M. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Excitation functions and isomer ratio measurements for the reaction /sup 41/K(/sup 6/Li,p2n)/sup 44/Sc/sup m/,/sup 44/Sc/sup q/. [14. 4, 23. 4, 32. 0, and 41. 5 MeV]

Description: For the purpose of eventually determining how population distributions of /sup 44/Sc* in the E-J plane affect resulting isomer ratios in /sup 44/Sc, excitation functions and isomer ratios in the reaction /sup 41/K(/sup 6/Li,p2n)/sup 44/Sc/sup m/,/sup 44/Sc/sup q/ were measured. Preliminary results seem to indicate, as expected, a very weak compound nucleus reaction component of the reaction cross section.
Date: October 1, 1981
Creator: Nguyen, H. D.; Trinh, H. N.; Le, H. D.; Moody, K. J.; Groening, H. & Seaborg, G. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Clean-up criteria for remediation of contaminated soils

Description: {open_quotes}How clean is clean?{close_quotes} is a question commonly raised in the remediation of contaminated soils. To help with the answer, criteria are proposed to serve as guidelines for remedial actions and to define a clean-up level such that the remaining contaminant residuals in the soil will not violate the Drinking Water Standards (DWS). The equations for computing those criteria are developed from the principle of conservation of mass and are functions of the maximum concentration … more
Date: August 1, 1997
Creator: Nguyen, H. D.; Wilson, J. R. & Sato, Chikashi
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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