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Benchmarking and qualification of the NUFREQ-NPW code for best estimate prediction of multi-channel core stability margins

Description: The NUFREQ-NPW code was modified and set up at Westinghouse, USA for mixed fuel type multi-channel core-wide stability analysis. The resulting code, NUFREQ-NPW, allows for variable axial power profiles between channel groups and can handle mixed fuel types. Various models incorporated into NUFREQ-NPW were systematically compared against the Westinghouse channel stability analysis code MAZDA-NF, for which the mathematical model was developed, in an entirely different manner. Excellent agreement … more
Date: January 1, 1988
Creator: Taleyarkhan, R.; Lahey, R.T. Jr.; McFarlane, A.F. & Podowski, M.Z.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Waste package/repository impact study: Final report

Description: The Waste Package/Repository Impact Study was conducted to evaluate the feasibility of using the current reference salt waste package in the salt repository conceptual design. All elements of the repository that may impact waste package parameters, i.e., (size, weight, heat load) were evaluated. The repository elements considered included waste hoist feasibility, transporter and emplacement machine feasibility, subsurface entry dimensions, feasibility of emplacement configuration, and temperatu… more
Date: September 1, 1985
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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SRC area design considerations. Non-proprietary version. [Reexamination of 15 critical equipment or process items]

Description: ICRC requested Catalytic to research, review and analyze their record documents, presently stored at a warehousing facility, (Records Management Associates, 2410 Walnut Street, Philadelphia, PA 19107), and prepare a report outlining the technical concerns, actions taken to offset these concerns, results of these actions, and recommend further investigation, if deemed necessary. This report reviews the fifteen systems or items requested in Work Order XQ-3353. These had been previously listed on … more
Date: June 1, 1984
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Evaluation of a radioactive concrete waste form recovered from an ocean dumpsite

Description: Little dissolution of the concrete waste form in the ocean environment occurred as evidenced by a maximum waste package weight loss of approximately 5%. Water loss through evaporation during curing and dissolution of calcium hydroxide in disposal or inaccuracy of the initial weighing are believed to be responsible for the apparent weight loss. A conservative estimate that assumes a constant 0.33%/yr weight loss due solely to cement-phase dissolution predicts that it would require a minimum of 3… more
Date: January 1, 1982
Creator: Colombo, P. & Neilson, R.M. Jr.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Beam and plasma direct converters

Description: Two types of direct converters, one for beams and one for plasma, are under development with voltages and power densities approaching reactor-like conditions. Beam direct conversion raises the efficiency of producing neutral beams, can save millions of dollars when applied to next-generation experiments, and can improve the power balance of driven reactors. Direct conversion allows positive ion beams to be made into neutrals efficiently up to 150 keV for D/sup 0/, 225 keV for T/sup 0/ and 300 k… more
Date: September 11, 1978
Creator: Moir, Ralph W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Calculation of kinetic spatial weighting factors in power reactors

Description: Ex-core neutron detector kinetic (frequency-dependent) spatial sensitivities (weighting factors) for in-core neutron sources were determined by performing space-dependent, transport and diffusion theory, kinetic detector adjoint calculations in which both source propagation through fission processes and the frequency dependence of the reactivity-to-power transfer function were considered. This study was pursued to overcome the shortcomings of previous calculations of ex-core detector weighting … more
Date: January 1, 1982
Creator: Sweeney, F. J. & Renier, J. P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Research and development of rapid hydrogenation for coal conversion to synthetic motor fuels (riser cracking of coal). Final report, April 1, 1976-September 30, 1980

Description: The objective of the program described was to develop a noncatalytic process for the hydropyrolysis of lignite and coal to produce high-octane blending gasoline constituents, methane, ethane, and carbon oxides. The process would operate in a balanced plant mode, using spent char to generate process hydrogen by steam-oxygen gasification. The technical program included the construction and operating of a bench-scale unit (5-10 lb/hr), the design, construction, and operation of a process developme… more
Date: February 1, 1981
Creator: Duncan, D. A.; Beeson, J. L. & Oberle, R. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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On the meaning of [Delta]T/T

Description: One of the most interesting aspects of the discovery of Microwave Background Radiation (MBR) anisotropy by the COBE satellite is the ability to compare these anisotropies with the amplitude of density inhomogeneities we measure. Combining these two, we can get a unified'' view of the inhomogeneities present in our universe on a broad range of scales. To make this comparison we must be able to translate [Delta]T/T into [delta]p/[bar p], the mass overdensity. This latter quantity we may try to de… more
Date: February 1, 1993
Creator: Stebbins, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Shielding gas composition and electrode geometry influence on arc properties

Description: The effects of welding electrode geometry and of shielding gas composition using pure argon, argon-helium mixtures, and an argon-hydrogen mixture on welding arc properties, particularly acr temperature distribution was studied. Plasma diagnostic techniques were used to measure the arc properties presented. A computer-controlled emission spectroscopy system comprised of an Optical Multichannel Analyzer (OMA) interfaced to 0.3-m monochromator was used to make temperature and composition measureme… more
Date: January 1, 1981
Creator: Key, J.F. & McIlwain, M.E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A model for the immune system response to HIV: AZT treatment studies

Description: We use mathematical models to describe the interaction of the immune system with the human immunodeficiency virus (HIV). Our model includes T-lymphocytes and macrophages, cells which can be infected with the virus. Using our model we compare the efficacy of AZT treatments given at different stages of disease progression in order to predict when treatment should be initiated.
Date: January 1, 1993
Creator: Kirschner, D.E. (Vanderbilt Univ., Nashville, TN (United States). Dept. of Mathematics) & Perelson, A.S. (Los Alamos National Lab., NM (United States))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Analysis of the Clean Air Act Amendments of 1990: A forecast of the electric utility industry response to Title IV, Acid Deposition Control

Description: The Clean Air Act Amendments of 1990 incorporate, for the first time, provisions aimed specifically at the control of acid rain. These provisions restrict emissions of sulfur dioxide (SO[sub 2]) and oxides of nitrogen (NO[sub x]) from electric power generating stations. The restrictions on SO[sub 2] take the form of an overall cap on the aggregate emissions from major generating plants, allowing substantial flexibility in the industry's response to those restrictions. This report discusses one … more
Date: October 1, 1991
Creator: Molburg, J.C.; Fox, J.A.; Pandola, G. & Cilek, C.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Procedures for analyzing data for use in models

Description: An approach to energy-data verification is presented, with specific methodology discussed. By employing data-verification techniques and methodologies, specific problem areas in data bases are discovered. The applications section is augmented by illustrative examples taken from the entitlement program. Four steps are suggested to accomplish data verification - hypotheses, technique selection, model formation, and interpretation.
Date: June 1, 1980
Creator: Herbert, J.H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Properties of radioactive wastes and waste containers. Progress report No. 5, April--June 1977

Description: Portland type II cement decontamination factors for free standing water were determined to be 1, 11, and 200 for /sup 137/Cs, /sup 85/Sr, and /sup 60/Co respectively, indicating ion exchange processes occurring within the cement matrix. The quantity of organic carbon that could be removed from solidification agent matrix materials on leaching in distilled water was measured. No organic carbon was present in the portland type II cement leachant water after ten days while 3.4 ppM, 34.2 ppM, and 9… more
Date: November 1, 1977
Creator: Colombo, P. & Neilson, R.M. Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Investigation of the Si(111) Surface in UHV: Oxidation and the Effect of Surface Phosphorus

Description: We have studied the initial stages of oxidation, the segregation of phosphorus, and the effect of phosphorus on oxidation of the Si(111) 7 x 7 surface using optical second-harmonic generation. We have also observed a (..sqrt..3 x ..sqrt..3)R30/sup 0/ LEED pattern for P on Si(111).
Date: June 1, 1984
Creator: Tom, H.W.K.; Zhu, X.D.; Shen, Y.R. & Somorjai, G.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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ILUCG algorithm which minimizes in the Euclidean norm

Description: An algroithm is presented which solves sparse systems of linear equations of the form Ax = Y, where A is non-symmetric, by the Incomplete LU Decomposition-Conjugate Gradient (ILUCG) method. The algorithm minimizes the error in the Euclidean norm vertical bar x/sub i/ - x vertical bar/sub 2/, where x/sub i/ is the solution vector after the i/sup th/ iteration and x the exact solution vector. The results of a test on one real problem indicate that the algorithm is likely to be competitive with th… more
Date: July 1, 1978
Creator: Petravic, M. & Kuo-Petravic, G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Test prediction for the German PKL test K5A using RELAP4/MOD6. [PWR]

Description: RELAP4/MOD6 is a computer code developed specifically to predict the transient thermal-hydraulic behavior of a PWR and related experimental reactor systems during reflood phase of postulated LOCA conditions. A ''blind'' test prediction for the German PKL reflood Test K5A was conducted using RELAP4/MOD6. The results of the prediction were in good agreement with experimental data indicating that RELAP4/MOD6 is capable of predicting transient reflood phenomena in the 200 percent cold-leg break tes… more
Date: January 1, 1978
Creator: Chen, Y. S.; Haigh, W. S.; Sullivan, L. H. & Fischer, S. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Survey and documentation of emerging technologies for the satellite power system (SPS)

Description: The purpose of this study is to survey emerging technologies and new concepts which may offer advantages over those selected for the SPS Reference System. A brief historical overview of the genesis of the Solar Power Satellite (SPS) concept is presented leading to a discussion of the assumptions and guidelines which were originally established and which led to development of the SPS Reference System design concept. Some of these guidelines are applicable to almost any SPS design, but others cou… more
Date: April 1, 1981
Creator: Glaser, P. & Chapman, P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Micro-agglomerate flotation for deep cleaning of coal

Description: We are investigating the use of a hybrid process, Micro-agglomerate flotation, which is a combination of oil-agglomeration and froth flotation. The basic concept is to use small quantities of oil to promote the formation of dense micro-agglomerates with minimal entrapment of water and mineral particles, and to use froth flotation to extract these micro-agglomerates from the water/dispersed-mineral phase. Since the floating units are agglomerates (about 30--50 [mu]m in size) rather than individu… more
Date: April 1, 1993
Creator: Chander, S. & Hogg, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analytical support for the ORR (Oak Ridge Research Reactor) whole-core LEU U/sub 3/Si/sub 2/-Al fuel demonstration

Description: Analytical methods used to analyze neutronic data from the whole-core LEU fuel demonstration in the Oak Ridge Research Reactor are briefly discussed. Calculated eigenvalues corresponding to measured critical control rod positions are presented for each core used in the gradual transition from an all HEU to an all LEU configuration. Some calculated and measured results, including ..beta../sub eff//l/sub p/, are compared for HEU and LEU fresh fuel criticals. Finally, the perturbing influences of … more
Date: January 1, 1986
Creator: Bretscher, M.M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Market penetration of new energy technologies

Description: This report examines the characteristics, advantages, disadvantages, and, for some, the mathematical formulas of forecasting methods that can be used to forecast the market penetration of renewable energy technologies. Among the methods studied are subjective estimation, market surveys, historical analogy models, cost models, diffusion models, time-series models, and econometric models. Some of these forecasting methods are more effective than others at different developmental stages of new tec… more
Date: February 1, 1993
Creator: Packey, D.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Preliminary remedial action objectives for the Tank 16 groundwater operable unit

Description: Tank 16 is a High Level Radioactive Waste tank in the H-Area Tank Farm on the Savannah River Site that was placed into service in May 1959. A leak was detected in one of the construction weld joints while the tank was being filled. Before jet evacuation of the tank waste was completed, the leak overflowed the annulus pan and an estimated 16 to 700 gallons of waste escaped to the environment (soil and groundwater) over a six hour period contaminating approximately 1,600--70,000 cubic feet of soi… more
Date: October 28, 1992
Creator: Miles, W.C. Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Silicon solar cell process development, fabrication, and analysis. Seventh quarterly report, 1 July 1980-30 September 1980

Description: Progress in fabrication and characterization of solar cells from EFG ribbons and HEM ingots is reported. EFG ribbons grown in carbon-containing gas atmosphere showed improved sheet quality. This new EFG provided an average baseline cell efficiency of 10.3% under AM1 (as opposed to 8.0% for the earlier EFG). The best efficiency achieved by the advanced process was 13.8% AM1. Evaluation of two ingots from the HEM process indicated that HEM has a problem of inhomogeneity in sheet quality within ea… more
Date: January 1, 1980
Creator: Yoo, H.I.; Iles, P.A. & Leung, D.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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