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Status Report on Studies of Recovery Boiler Composite Floor Tube Cracking

Description: Cracking of the stainless steel layer of co-extruded 304L stainless steel/SA210 Gd A 1 carbon steel black liquor recovery boiler floor tubes has been identified as one of the most serious material problems in the pulp and paper industry. A DOE-funded study was initiated in 1995 with the goal of determining the cause of and possible solutions to this cracking problem. These studies have characterized tube cracking as well as the chemical and thermal environment and stress state of floor tubes. I… more
Date: September 12, 1999
Creator: Eng, P.; Frederick, L. A.; Hoffmann, C. M.; Keiser, J. R.; Mahmood, J.; Maziasz, P. J. et al.
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Partner: UNT Libraries Government Documents Department
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Thermal Behavior of Floor Tubes in a Kraft Recovery Boiler

Description: The temperatures of floor tubes in a slope-floored black liquor recovery boiler were measured using an array of thermocouples located on the tube crowns. It was found that sudden, short duration temperature increases occurred with a frequency that increased with distance from the spout wall. To determine if the temperature pulses were associated with material falling from the convective section of the boiler, the pattern of sootblower operation was recorded and compared with the pattern of temp… more
Date: September 12, 1999
Creator: Barker, R. E.; Choudhury, K. A.; Gorog, J. P.; Hall, L. M.; Keiser, J. R. & Sarma, G. B.
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Partner: UNT Libraries Government Documents Department
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A Flow-Through High-Pressure Electrical Conductance Cell for Determining of Ion Association of Aqueous Electrolyte Solutions at High Temperature and Pressure

Description: A flow-through high-pressure electrical conductance cell was designed and constructed to measure limiting molar conductances and ion association constants of dilute aqueous solutions with high precision at high temperatures and pressures. The basic concept of the cell employs the principle developed at the University of Delaware in 1995, but overall targets higher temperatures (to 600 C) and pressures (to 300 MPa). At present the cell has been tested by measuring aqueous NaCl and LiOH solutions… more
Date: September 12, 1999
Creator: Bianchi, H.; Ho, P. C.; Palmer, D. A. & Wood, R. H.
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Partner: UNT Libraries Government Documents Department
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Impact of the ENDF/B-VI Cross Section on the RPV Fluence Determination

Description: The calculations with the broad-group cross-section library Bugle-96, and atom displacement (dpa) cross sections for iron, both derived from ENDF/B-VI data, result in higher calculated fast neutron fluxes, better agreement of calculations with radiometric dosimeter measurements, and significantly slower dpa rate attenuation through pressure vessel walls relative to the results with their predecessors: the Sailor library and ASTM iron dpa cross sections.
Date: September 12, 1999
Creator: Remec, I.
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Partner: UNT Libraries Government Documents Department
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U.S. NRC Embrittlement Data Base (EDB)

Description: Large amounts of data obtained from surveillance capsules and test reactor experiments are needed, comprising many different materials and different irradiation conditions, to develop generally applicable damage prediction models that can be used for industry standards and regulatory guides. Version 1 of the Embrittlement Data Base (EDB) [I] is such a comprehensive collection of such data resulting from the merging of the Power Reactor Embrittlement Data Base (PR-EDB) [2] and the Test Reactor E… more
Date: September 12, 1999
Creator: Pace, J.V.; Rosseel, T.M. & Wang, J.A.
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Partner: UNT Libraries Government Documents Department
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Nuclear Material Recovery at Los Alamos National Laboratory Using TechXtract{reg_sign} Decontamination Technology

Description: One mission of the Los Alamos National Laboratory (LANL) is to affect pollution prevention and waste minimization surrounding operations at their Plutonium Facility. Efforts are underway and technologies are being deployed to capture the actinide at the source thereby reducing the amount of nuclear material leaving the facility as transuranic waste. Traditional processing alternatives for decontamination, such as strong acid leaching and surface brushing have not achieved the desired recovery e… more
Date: September 12, 1999
Creator: Fay, S.; Dennison, D.; Fife, K. & Punjak, W.
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Partner: UNT Libraries Government Documents Department
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Volumetric Properties and Phase Relations of Binary H{sub 2}O-CO{sub 2}-CH{sub 4}-N{sub 2} Mixtures at 300 C and Pressures to 1000 Bars

Description: The volumetric properties and phase relations of binary mixtures of H{sub 2}0, CO{sub 2}, CH{sub 4} and N{sub 2} were determined experimentally at 3OO C, 74.4--999.3 bars, using a custom-built vibrating-tube densimeter. Densities of all single-phase fluids increase steadily with increasing pressure. At a given pressure, CO{sub 2}-rich H{sub 2}O-CO{sub 2} mixtures show a pronounced nonlinear decrease in density with increasing mole fraction CO, in marked contrast to the densities of N{sub 2}-ric… more
Date: September 12, 1999
Creator: Singh, J.; Blencoe, J.G. & Anovitz, M.
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Partner: UNT Libraries Government Documents Department
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Experimental Determinations of the Activity-Composition Relations and Phase Equilibria of H{sub 2}O-CO{sub 2}-NaCl Fluids

Description: An understanding of activity-composition (a/X) relations and phase equilibria for halite-bearing, mixed-species supercritical fluids is critically important in many geological and industrial applications. The authors have performed experiments on the a/X relations and phase equilibria of H{sub 2}O-CO{sub 2}-NaCl fluids at 5OO C, 500 bars, to obtain highly accurate and precise data for this ternary system. H{sub 2}O-CO{sub 2}-NaCl samples were reacted at a (H{sub 2}O) = 0.350, 0.425, 0.437, 0.44… more
Date: September 12, 1999
Creator: Anovitz, L.M.; Labotka, T.C.; Blencoe, J.G.; Singh, J. & Horita, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A Semi-Empirical Excess Pressure Equation for CO{sub 2}-H{sub 2}O fluids at 400 C, 0--400 MPa

Description: Highly accurate and precise density data for CO{sub 2}-H{sub 2}O mixtures at 400 C 10-400 MPa, were used to develop a modified, B-truncated virial equation for excess pressure (P{sup ex}). This function and empirical equations of state for H{sub 2}O and CO{sub 2} accurately represent the experimentally determined densities, and interpolate smoothly between data points. Integrating the P{sub ex} expression with respect to molar volume yields an equation for excess Helmholta free energy, which ca… more
Date: September 12, 1999
Creator: Blencoe, J. G.; Anovitz, L. M. & Singh, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Evaluation of Models for Solubility and Volatility of Copper Compounds Under Steam Generation Conditions

Description: The loss in efficiency of power plants with mixed metallurgy, due to transport and deposition of copper and its oxides in HP turbines, has been recognized as one of the key problems to be solved in the utility industry worldwide. Within this context, the most important problem to be addressed is the solubility and volatility of copper compounds under steam generation condition. This paper presents an evaluation of different solubility end volatility models for copper compounds, and presents a c… more
Date: September 12, 1999
Creator: Palmer, D. & Petrov, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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