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Description: Research has been conducted under United States Department of Energy Contract (USDOE) DE-AC21-86MC21023 to develop a new type of coal-fired plant for electric power generation. This new type of plant, called a Second Generation Pressurized Fluidized Bed Combustion Plant (2nd Gen PFB), offers the promise of efficiencies greater than 48%, with both emissions and a cost of electricity that are significantly lower than those of conventional pulverized coal-fired (PC) plants with wet flue gas desulfurization/scrubbers. The 2nd Gen PFB plant incorporates the partial gasification of coal in a carbonizer, the combustion of carbonizer char in a pressurized circulating fluidized (PCFB) bed boiler, and the combustion of carbonizer syngas in a topping combustor to achieve gas turbine inlet temperatures of 2700 F and higher. Under the USDOE Clean Coal V Demonstration Plant Program, a nominal 260 MWe plant demonstrating 2nd Gen PFB technology has been proposed for construction at the McIntosh Power Plant of the City of Lakeland, Florida. In the September-December 1997 time period, four test runs were conducted in Foster Wheeler's 12-inch diameter carbonizer pilot plant in Livingston New Jersey to ascertain carbonizer performance characteristics with the Kentucky No. 9 coal and Florida limestone proposed for use in the Lakeland plant. The tests were of a short-term nature exploring carbonizer carbon conversions, sulfur capture efficiencies and syngas alkali levels. The tests were successful; observed carbonizer performance was in agreement with predictions and no operating problems, attributed to the planned feedstocks, were encountered. The results of the four test runs are reported herein.
Date: September 1, 2003
Creator: Lu, C.; Fan, Z.; Froehlich, R. & Robertson, A.
Partner: UNT Libraries Government Documents Department

Limited Streamer Tubes for the BaBar Instrumented Flux Return Upgrade

Description: Starting from the very beginning of their operation the efficiency of the RPC chambers in the BaBar Instrumented Flux Return (IFR) has suffered serious degradation. After intensive investigation, various remediation efforts had been carried out, but without success. As a result the BaBar collaboration decided to replace the dying barrel RPC chambers about two years ago. To study the feasibility of using the Limited Streamer Tube (LST) as the replacement of RPC we carried out an R&D program that has resulted in BaBar's deciding to replace the barrel RPC's with LST's. In this report we summarize the major detector R&D results, and leave other issues of the IFR system upgrade to the future publications.
Date: October 11, 2005
Creator: Lu, C. & U., /Princeton
Partner: UNT Libraries Government Documents Department

Pollution prevention in the analytical laboratory--Microscale and other techniques do add up

Description: The principles of pollution prevention in the analytical laboratory have not been addressed sufficiently. Although the amount of reagent used per sample is often only a few milliliters, the aggregate of many routine test each day in thousands of laboratories becomes significant. Current recycling practices are not practical with small streams. Therefore, we have adopted the principles of microscale chemistry, along with other modern analytical approaches, to develop routine analytical methods that significantly curtail waste but still maintain acceptable analytical figures of merit and achieve cost savings through reduced reagent consumption and reduced labor cost.
Date: July 1, 1996
Creator: Erickson, M.D.; Alvarado, J.S.; Lu, C.-S.; Peterson, D.P. & Silzer, J.
Partner: UNT Libraries Government Documents Department

Incorporation of pollution prevention principles in environmental methods

Description: The principles of pollution prevention (P2) have not been sufficiently incorporated into analytical methods. In this paper, we focus on the needs for and the benefits of incorporating the principles of P2 into environmental analytical methods.
Date: July 1, 1996
Creator: Erickson, M.D.; Alvarado, J.S.; Lu, C.-S.; Peterson, D.P. & Silzer, J.
Partner: UNT Libraries Government Documents Department

Second-generation PFBC systems research and development -- Phase 2, circulating PFBC test results

Description: The objectives of Phase 2 of this project are threefold. First, the separate testing of key components [the carbonizer, circulating pressurized fluidized bed combustor (CPFBC), particle capturing ceramic barrier filter, and topping combustor] of second generation PFB combustion plants at laboratory scale to ascertain their performance characteristics is to be performed. Second, commercial plant performance and economic predictions will be revised. Finally, a 1.2-MWe equivalent integrated subsystem test of the key components will be prepared for Phase 3.
Date: September 1, 1994
Creator: Robertson, A.; Van Hook, J.; Burkhard, F.; Carli, G.; Conn, R.; Crooker, P. et al.
Partner: UNT Libraries Government Documents Department

A large liquid argon time projection chamber for long-baseline, off-axis neutrino oscillation physics with the NuMI beam

Description: Results from neutrino oscillation experiments in the last ten years have revolutionized the field of neutrino physics. While the overall oscillation picture for three neutrinos is now well established and precision measurements of the oscillation parameters are underway, crucial issues remain. In particular, the hierarchy of the neutrino masses, the structure of the neutrino mixing matrix, and, above all, CP violation in the neutrino sector are the primary experimental challenges in upcoming years. A program that utilizes the newly commissioned NuMI neutrino beamline, and its planned upgrades, together with a high-performance, large-mass detector will be in an excellent position to provide decisive answers to these key neutrino physics questions. A Liquid Argon time projection chamber (LArTPC) [2], which combines fine-grained tracking, total absorption calorimetry, and scalability, is well matched for this physics program. The few-millimeter-scale spatial granularity of a LArTPC combined with dE/dx measurements make it a powerful detector for neutrino oscillation physics. Scans of simulated event samples, both directed and blind, have shown that electron identification in {nu}{sub e} charged current interactions can be maintained at an efficiency of 80%. Backgrounds for {nu}{sub e} appearance searches from neutral current events with a {pi}{sup 0} are reduced well below the {approx} 0.5-1.0% {nu}{sub e} contamination of the {nu}{sub {mu}} beam [3]. While the ICARUS collaboration has pioneered this technology and shown its feasibility with successful operation of the T600 (600-ton) LArTPC [4], a detector for off-axis, long-baseline neutrino physics must be many times more massive to compensate for the low event rates. We have a baseline concept [5] based on the ICARUS wire plane structure and commercial methods of argon purification and housed in an industrial liquefied-natural-gas tank. Fifteen to fifty kton liquid argon capacity tanks have been considered. A very preliminary cost estimate for a 50-kton detector is $100M ...
Date: September 1, 2005
Creator: Finley, D.; Jensen, D.; Jostlein, H.; Marchionni, A.; Pordes, S.; Rapidis, P. A. et al.
Partner: UNT Libraries Government Documents Department

Silicon drift devices for track and vertex detection at the SSC

Description: We report on the recent progress in the study of Semiconductor Drift (Memory) Detectors intended for an inner tracking and vertexing system for the SSC. The systematic studies and the calibration of the existing detectors and the simulated performance in the actual SSC environment are highlighted. 5 refs., 22 figs., 1 tab.
Date: January 1, 1990
Creator: Chen, W.; Kraner, H.; Li, Z.; Ng, C.; Radeka, V.; Rehak, P. et al.
Partner: UNT Libraries Government Documents Department