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Direct Fast-Neutron Detection
Direct fast-neutron detection is the detection of fast neutrons before they are moderated to thermal energy. We have investigated two approaches for using proton-recoil in plastic scintillators to detect fast neutrons and distinguish them from gamma-ray interactions. Both approaches use the difference in travel speed between neutrons and gamma rays as the basis for separating the types of events. In the first method, we examined the pulses generated during scattering in a plastic scintillator to see if they provide a means for distinguishing fast-neutron events from gamma-ray events. The slower speed of neutrons compared to gamma rays results in the production of broader pulses when neutrons scatter several times within a plastic scintillator. In contrast, gamma-ray interactions should produce narrow pulses, even if multiple scattering takes place, because the time between successive scattering is small. Experiments using a fast scintillator confirmed the presence of broader pulses from neutrons than from gamma rays. However, the difference in pulse widths between neutrons and gamma rays using the best commercially available scintillators was not sufficiently large to provide a practical means for distinguishing fast neutrons and gamma rays on a pulse-by-pulse basis. A faster scintillator is needed, and that scintillator might become available …
Date:
December 30, 1999
Creator:
Stromswold, David C.; Peurrung, Anthony J.; Hansen, Randy R. & Reeder, Paul L.
Object Type:
Report
System:
The UNT Digital Library
DIRECT LIQUEFACTION PROOF-OF-CONCEPT PROGRAM
This report presents the results of the bench-scale work, Bench Run PB-09, HTI Run Number 227-106, conducted under the DOE Proof-of-Concept Option Program indirect coal liquefaction at Hydrocarbon Technologies Inc. in Lawrenceville, New Jersey. Bench Run PB-09 was conducted using two types of Chinese coal, Shenhua No.2 and Shenhua No.3, and had several goals. One goal was to study the liquefaction performance of Shenhua No.2 and Shenhua No.3 with respect to coal conversion and distillate production. Another goal of Bench Run PB-09 was to study the effect of different GelCatw formulations and loadings. At the same time, the space velocity and the temperature of the fmt reactor, K-1, were varied to optimize the liquefaction of the two Chinese coals. The promoter-modified HTI GelCat{trademark} catalyst was very effective in the direct liquefaction of coal with nearly 92% maf coal conversion with Shenhua No.3 and 93% maf coal conversion with 9 Shenhua No.2. Distillate yields (CQ-524 C)varied from 52-68% maf for Shenhua No.3 coal to 54-63% maf for Shenhua No.2 coal. The primary conclusion from Bench Run PB-09 is that Shenhua No.3 coal is superior to Shenhua No.2 coal in direct liquefaction due to its greater distillate production, although coal conversion is …
Date:
December 30, 1999
Creator:
Comolli, A.G.; Lee, T.L.K.; Hu, J.; Popper, G.; Elwell, M.D.; Miller, J. et al.
Object Type:
Report
System:
The UNT Digital Library
DIRECT LIQUEFACTION PROOF-OF-CONCEPT PROGRAM - BENCH RUN PB-10 (HTI 227-109)
This report presents the results of the bench-scale test, PB-10, performed at HTI's facilities under DOE contract (HTI Run No. 227-109). This bench test continues the work that was started in PDU testing 260-007. Previous bench test (PB-09, HTI 227-106) was performed on different seams of Chinese coal (Shenhua Ningtiaota Coal No.2 and No.3). Since another coal, Shangwan coal was selected for the liquefaction plant, PB-10 was made as approved by DOE/COR. The objective of this test was to evaluate the liquefaction performance of Shangwan coal utilizing various backend processing and recycle schemes. Additionally, this test was to collect available process data to allow for the best scale-up process design possible from this particular unit.
Date:
December 30, 1999
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Electra Star-News (Electra, Tex.), Vol. 93, No. 20, Ed. 1 Thursday, December 30, 1999
Weekly newspaper from Electra, Texas that includes local, state, and national news along with advertising.
Date:
December 30, 1999
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Energy Efficient Aluminum Production - Pilot-Scale Cell Tests - Final Report for Phase I and Phase II
A cermet anode that produces oxygen and a cathode material that is wetted by aluminum can provide a dimensionally stable inter-electrode distance in the Hall-Heroult cell. This can be used to greatly improve the energy and/or productivity efficiencies. The concept, which was developed and tested, uses a system of vertically interleaved anodes and cathodes. The major advantage of this concept is the significant increase in electrochemical surface area compared to a horizontal orientation of anode and cathode that is presently used in the Hall-Heroult process. This creates an additional advantage for energy reduction of 1.3 kWh/lb or a 20% productivity improvement. The voltages obtained in an optimized cell test met the energy objectives of the project for at least two weeks. An acceptable current efficiency was never proven, however, during either pilot scale or bench scale tests with the vertical plate configuration. This must be done before a vertical cell can be considered viab le. Anode corrosion rate must be reduced by at least a factor of three in order to produce commercial purity aluminum. It is recommended that extensive theoretical and bench scale investigations be done to improve anode materials and to demonstrate acceptable current efficiencies in a vertical …
Date:
December 30, 1999
Creator:
Christini, R. A.
Object Type:
Report
System:
The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Thursday, December 30, 1999
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 30, 1999
Creator:
Bush, Kent
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
[Funeral Program for Frank Bryant, Jr., December 30, 1999]
Funeral program for Frank Bryant, Jr., M.D., born December 13, 1930. The funeral was held Thursday, December 30, 1999 at Second Baptist Church, officiated by Rev. Robert L. Jemerson, Pastor. Funeral arrangements were made through Sutton-Sutton Mortuary and he was buried in Fort Sam Houston National Cemetery near San Antonio, Texas.
Date:
December 30, 1999
Creator:
unknown
Object Type:
Pamphlet
System:
The Portal to Texas History
Garber Billings News (Garber, Okla.), Vol. 100, No. 12, Ed. 1 Thursday, December 30, 1999
Weekly newspaper from Garber, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 30, 1999
Creator:
Hogan, Vickie Lee
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Giddings Times & News (Giddings, Tex.), Vol. 110, No. 29, Ed. 1 Thursday, December 30, 1999
Weekly newspaper from Giddings, Texas that includes local, state, and national news along with advertising.
Date:
December 30, 1999
Creator:
Preuss, L. M., III & True, David G.
Object Type:
Newspaper
System:
The Portal to Texas History
The Goldthwaite Eagle (Goldthwaite, Tex.), Vol. 105, No. 23, Ed. 1 Thursday, December 30, 1999
Weekly newspaper from Goldthwaite, Texas that includes local, state, and national news along with extensive advertising.
Date:
December 30, 1999
Creator:
Bridges, G. Frank & Bridges, Georgie
Object Type:
Newspaper
System:
The Portal to Texas History
Hondo Anvil Herald (Hondo, Tex.), Vol. 113, No. 52, Ed. 1 Thursday, December 30, 1999
Weekly newspaper from Hondo, Texas that includes local, state, and national news along with extensive advertising.
Date:
December 30, 1999
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Interfacial Properties of Electron Beam Cured Composites
The objectives of the CRADA are to: Confirm that fiber-resin adhesion is responsible for the observed poor shear properties; Determine the mechanism(s) responsible for poor adhesion between carbon fibers and epoxy resins after e-beam curing; Develop and evaluate resin systems and fiber treatments to improve the properties of e-beam cured, carbon-fiber-reinforced composites; and Develop refined methods for processing e-beam cured, carbon-fiber-reinforced composites.
Date:
December 30, 1999
Creator:
Eberle, C.C.
Object Type:
Report
System:
The UNT Digital Library
Legislative Branch Appropriations Bill: Fact Sheet on Structure, Content, and Process
This report discusses the legislative branch appropriations bill, which is one of the regular appropriations bills that Congress normally enacts each year for the fiscal year beginning on October 1. The report provides budget authority, which is statutory authority to spend specified amounts of money, for expenditures of the legislative branch for the fiscal year, including salaries.
Date:
December 30, 1999
Creator:
Tong, Lorraine H.
Object Type:
Report
System:
The UNT Digital Library
De Leon Free Press (De Leon, Tex.), Vol. 110, No. 27, Ed. 1 Thursday, December 30, 1999
Weekly newspaper from De Leon, Texas that includes local, state, and national news along with advertising.
Date:
December 30, 1999
Creator:
Morgan, Jerry
Object Type:
Newspaper
System:
The Portal to Texas History
De Leon's Monitor (De Leon, Tex.), Vol. 5, No. 26, Ed. 1 Thursday, December 30, 1999
Weekly newspaper from De Leon, Texas that includes local, state, and national news along with advertising.
Date:
December 30, 1999
Creator:
Huffman, Russell
Object Type:
Newspaper
System:
The Portal to Texas History
The Llano News (Llano, Tex.), Vol. 112, No. 12, Ed. 1 Thursday, December 30, 1999
Weekly newspaper from Llano, Texas that includes local, state, and national news along with advertising.
Date:
December 30, 1999
Creator:
Stephenson, Jimmy
Object Type:
Newspaper
System:
The Portal to Texas History
News Bulletin (Castroville, Tex.), Vol. 41, No. 52, Ed. 1 Thursday, December 30, 1999
Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date:
December 30, 1999
Creator:
Barnes, Thomas
Object Type:
Newspaper
System:
The Portal to Texas History
The Odem-Edroy Times (Odem, Tex.), Vol. 92, No. 52, Ed. 1 Thursday, December 30, 1999
Weekly newspaper from Odem, Texas that includes local, state, and national news along with advertising.
Date:
December 30, 1999
Creator:
Johnson-Dust, Jennifer
Object Type:
Newspaper
System:
The Portal to Texas History
The Oklahoma Eagle (Tulsa, Okla.), Vol. 78, No. 52, Ed. 1 Thursday, December 30, 1999
Weekly newspaper from Tulsa, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 30, 1999
Creator:
unknown
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Performance Evaluation of Micronized-Magnetite Cycloning as a Function of Key Operational Variables, Research Report
None
Date:
December 30, 1999
Creator:
Maronde, Carl P.; Killmeyer, Richard P.; Ciocco, Michael V. & Zandhuis, Paul H.
Object Type:
Report
System:
The UNT Digital Library
Perry Daily Journal (Perry, Okla.), Vol. 106, No. 254, Ed. 1 Thursday, December 30, 1999
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 30, 1999
Creator:
Brown, Gloria
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Polk County Enterprise (Livingston, Tex.), Vol. 117, No. 104, Ed. 1 Thursday, December 30, 1999
Semi-weekly newspaper from Livingston, Texas that includes local, state and national news along with advertising.
Date:
December 30, 1999
Creator:
White, Barbara
Object Type:
Newspaper
System:
The Portal to Texas History
Port Aransas South Jetty (Port Aransas, Tex.), Vol. 29, No. 52, Ed. 1 Thursday, December 30, 1999
Weekly newspaper from Port Aransas, Texas on Mustang Island that includes local, state and national news along with advertising.
Date:
December 30, 1999
Creator:
Judson, Mary
Object Type:
Newspaper
System:
The Portal to Texas History
Recharge Data Package for the Immobilized Low-Activity Waste 2001 Performance Assessment
Lockheed Martin Hanford Company (LMHC) is designing and assessing the performance of disposal facilities to receive radioactive wastes that are currently stored in single- and double-shell tanks at the Hanford Site. The preferred method of disposing of the portion that is classified as immobilized low-activity waste (ILAW) is to vitrify the waste and place the product in near-surface, shallow-land burial facilities. The LMHC project to assess the performance of these disposal facilities is known as the Hanford ILAW Performance Assessment (PA) Activity, hereafter called the ILAW PA project. The goal of this project is to provide a reasonable expectation that the disposal of the waste is protective of the general public, groundwater resources, air resources, surface-water resources, and inadvertent intruders. Achieving this goal will require predictions of contaminant migration from the facility. To make such predictions will require estimates of the fluxes of water moving through the sediments within the vadose zone around and beneath the disposal facility. These fluxes, loosely called recharge rates, are the primary mechanism for transporting contaminants to the groundwater. Pacific Northwest National Laboratory (PNNL) assists LMHC in their performance assessment activities. One of the PNNL tasks is to provide estimates of recharge rates for current …
Date:
December 30, 1999
Creator:
Fayer, Michael J; Murphy, Ellyn M; Downs, Janelle L; Khan, Fenton Oswald; Lindenmeier, Clark W & Bjornstad, Bruce N
Object Type:
Report
System:
The UNT Digital Library