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Experimental results of core-concrete interactions using molten steel with zirconium
Four inductively sustained experiments, QT-D, QT-E, SURC-3, and SURC-3A, were performed in order to investigate the additional effects of zirconium metal oxidation on core debris-concrete interactions using molten stainless steel as the core debris simulant. The QT-D experiment ablated 18 cm of concrete axially during 50 minutes of interaction on limestone-common sand concrete using a 10 kg charge of 304 stainless steel to which 2 kg of zirconium metal was added subsequent to the onset of erosion. The QT-E experiment ablated 10 cm of limestone-common sand concrete axially and 10 cm radially during 35 minutes of sustained interaction using 50 kg of stainless steel and 10 kg of zirconium. The SURC-3 experiment had a 45 kg charge of stainless steel to which 1.1 kg of zirconium was subsequently added. SURC-3 axially eroded 33 cm of limestone concrete during two hours of interaction. The fourth experiment, SURC-3A, eroded 25 cm of limestone concrete axially and 9 cm radially during 90 minutes of sustained interaction. It utilized 40 kg of stainless steel and 2.2 kg of added zirconium as the charge material. All four experiments showed in a large increase in erosion rate, gas production, and aerosol release following the addition of …
Date:
July 1, 1990
Creator:
Copus, E.R.; Blose, R.E.; Brockmann, J.E.; Gomez, R.D. & Lucero, D.A. (Sandia National Labs., Albuquerque, NM (USA))
Object Type:
Report
System:
The UNT Digital Library
Experimental study of layer mixing, relative ionic escape velocity, and electron temperature gradients in spherical multilayered targets by XUV spectroscopy
This past year we have undertaken experiments at the University of Rochester's Laboratory for Laser Energetics investigating layer mixing and expansion velocities of spherical targets uniformly irradiated by high intensity laser light. We performed high resolution spectroscopic measurements of spherical plasmas, produced using the Omega laser, and have observed enhanced broadening of XUV emission lines due to the expansion velocities.
Date:
July 1, 1990
Creator:
Griem, H. R.
Object Type:
Report
System:
The UNT Digital Library
Expert systems: A new approach to radon mitigation training and quality assurance
Training radon mitigators and ensuring that they provide high-quality work on the scale necessary to reduce radon to acceptable levels in the large number of homes and schools requiring some mitigation is a challenging problem. The US Environmental Protection Agency and several states have made commendable efforts to train mitigators and ensure that they provide quality services to the public. Expert systems could be used to extend and improve the effectiveness of these efforts. The purpose of this paper is to introduce the radon community to this promising new technology. The paper includes a description of a prototype system developed by Pacific Northwest Laboratory that illustrates several of the capabilities that expert systems can provide, a brief explanation of how the prototype works, and a discussion of the potential roles and benefits of fully-developed expert systems for radon mitigation. 4 refs., 3 figs.
Date:
July 1, 1990
Creator:
Brambley, M. R.; Hanlon, R. L. & Parker, G. B.
Object Type:
Article
System:
The UNT Digital Library
The extraction of bitumen from western tar sands
Topics discussed include: characterization of bitumen impregnated sandstone, water based tar sand separation technology, electrophoretic characterization of bitumen and fine mineral particles, bitumen and tar sand slurry viscosity, the hot water digestion-flotation process, electric field use on breaking water-in-oil emulsions, upgrading of bitumens and bitumen-derived liquids, solvent extraction.
Date:
July 1, 1990
Creator:
Oblad, A. G.; Bunger, J. W.; Deo, M. D.; Hanson, F. V.; Miller, J. D. & Seader, J. D.
Object Type:
Report
System:
The UNT Digital Library
The extraction of bitumen from western tar sands. Annual report
Topics discussed include: characterization of bitumen impregnated sandstone, water based tar sand separation technology, electrophoretic characterization of bitumen and fine mineral particles, bitumen and tar sand slurry viscosity, the hot water digestion-flotation process, electric field use on breaking water-in-oil emulsions, upgrading of bitumens and bitumen-derived liquids, solvent extraction.
Date:
July 1990
Creator:
Oblad, A. G.; Bunger, J. W.; Deo, M. D.; Hanson, F. V.; Miller, J. D. & Seader, J. D.
Object Type:
Report
System:
The UNT Digital Library
FCC Record, Volume 5, No. 14, Pages 3902 to 4380, July 2 - July 13, 1990
Biweekly, comprehensive compilation of decisions, reports, public notices, and other documents of the U.S. Federal Communications Commission.
Date:
July 1990
Creator:
United States. Federal Communications Commission.
Object Type:
Book
System:
The UNT Digital Library
FCC Record, Volume 5, No. 15, Pages 4381 to 4782, July 16 - July 27, 1990
Biweekly, comprehensive compilation of decisions, reports, public notices, and other documents of the U.S. Federal Communications Commission.
Date:
July 1990
Creator:
United States. Federal Communications Commission.
Object Type:
Book
System:
The UNT Digital Library
A Feedback Device to Damp the Coherent Oscillations from Injection Errors in RHIC
None
Date:
July 1, 1990
Creator:
J., Xu; Claus, J. & Ruggiero, A. G.
Object Type:
Report
System:
The UNT Digital Library
Fermilab Physics Department TVC chip
The Electronics Group in the Physics Department at Fermilab has designed and has had produced 20 prototypes of a full custom four channel time to voltage converter using the ES2 direct write 2 {mu}m CMOS process. The actual implementation of the design was performed under contract by ASIC designs Inc. of Naperville, Illinois. Each channel has two hit capability and one level of input buffering: that is, up to four voltages representing time internals can be stored from each input for later ADC conversion. The chip produces an edited list of hits and presents the appropriate analog value on its output for each digital value on its hit address lines. The next hit address and analog voltage in the event is presented in response to an external strobe. One current sum proportional to the number of inputs hit for each input buffer is also provided. The chip has been designed to be used on a fastbus TDC card developed here, but it is our belief that it could be adapted to many TDC applications. 2 refs., 8 figs.
Date:
July 1, 1990
Creator:
Hansen, S. & Cotta-Ramusino, A.
Object Type:
Report
System:
The UNT Digital Library
Field Manual for Phocid Necropsies (Specifically Monachus schauinslandi)
From introduction: This necropsy manual is a guide for students and technicians in the examination of dead phocids, specifically the Hawaiian monk seal. With this manual, the person performing the necropsy should be able to conduct a gross examination of a monk seal and collect the necessary tissues for microscopic pathology and toxicological studies. The necropsy instructions are based on the assumption that the seal's carcass is very fresh and time is not a limiting factor.
Date:
July 1990
Creator:
Winchell, Jane M.
Object Type:
Report
System:
The UNT Digital Library
Final report on Expendable Pattern Casting Technology
The Expendable Pattern Casting (EPC) process is a potential casting process breakthrough which could dramatically improve the competitiveness of the US foundry industry. Cooperatively supported by US Industry and the Department of Energy and managed by the American Foundrymen's Society, a project was started in May 1989 to develop and optimize expendable pattern casting technology. Four major tasks were conducted in the first phase of the project. Those tasks involved: (1) reviewing published literature to determine the major problems in the EPC process, (2) evaluating factors influencing sand flow and compaction, (3) evaluating and comparing factors influencing sand flow and compaction, (3) evaluating and comparing casting precision obtained in the EPC process with that obtained in other processes, and (4) identifying critical parameters that control dimensional precision and defect formation in EP castings. 26 refs., 27 figs., 11 tabs.
Date:
July 1, 1990
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Final report on process modeling of cupola furnaces
This report describes the first phase of the AFS/DOE program on mathematical modeling of cupola behavior, covering the period May 19, 1989 to July 19, 1990. The objective of the program is to develop a comprehensive mathematical model of the cupola furnace for on-line and off-line process control and optimization. The work is being carried out by five organizations: Massachusetts Institute of Technology with responsibility for heat transfer and fluid flow modeling, and incorporation of the chemical models being developed by the University of Michigan team. Modern Equipment Company has the responsibility of compiling information on needed sensors for monitoring operation and providing materials data to be used for cupola input. General Motors, Central Foundry Division, is investigating the potential to augment the mathematical models with artificial intelligence programs. Lastly, General Motors Research laboratories are charged with providing accurate cupola operational data to test the models being developed. To date, a one-dimensional steady state model has been developed which considers heat transfer, fluid flow and important chemical processes: combustion, iron composition development, limestone calcination and iron oxidation. The model is based on established physico-chemical principles and data available in the literature. Model predictions compare favorably with data obtained in a …
Date:
July 1, 1990
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Forest Service Planning: Setting Strategic Direction Under RPA
This report evaluates past RPA efforts, reviews the process used by the Forest Service in preparing the 1989 RPA Assessment and the Draft 1990 RPA Program, and identities options for improving RPA’s contribution to long-range planning and to policy and budget deliberations. The second OTA report on Forest Service planning will review national forest planning, and will examine the relationship between national planning under RPA and forest planning under NFMA.
Date:
July 1990
Creator:
United States. Congress. Office of Technology Assessment.
Object Type:
Report
System:
The UNT Digital Library
FRACFLO: Analytical Solutions for Two-Dimensional Transport of a Decaying Species in a Discrete Planar Fracture and Equidistant Multiple Parallel Fractures With Rock Matrix Diffusion
Analytical solutions based on the Laplace and Fourier transformation techniques are derived for the transient advective-dispersive transport of a single radionuclide through fractures (two-dimensional analysis) and rock (one-dimensional analysis). The longitudinal dispersion-free solution is also reported. The geometry considered consists of either a single planar fracture (infinite diffusion in the rock) or a system of equidistant parallel fracture planes with uniform aperture (finite diffusion in the rock). The solution assumes that the ground-water flow regime is under steady-state and isothermal conditions, and the streamlines along the direction of flow are parallel. The solution related to the single fracture case was verified by comparing its performance with available results from other works. Two sets of solutions were derived for the multiple parallel fracture case; the first, based on a series approximation, and the second, based on contour integration, were designed to cope efficiently with small and large Fourier numbers, respectively. The general solution requires, in both cases, the evaluation of a single integral, except in the case of the solution based on contour integration, where an additional one is required. This is performed using a Gauss-Legendre quadrature scheme. 34 refs., 65 figs., 77 tabs.
Date:
July 1, 1990
Creator:
Gureghian, A. B.
Object Type:
Report
System:
The UNT Digital Library
From the neutron to three light neutrino species: Some highlights from sixty years of particle physics
I consider the beginning to modern particle physics to be in 1932--33, when James Chadwick discovered the neutron at Cambridge, England, and Carl Anderson discovered the positron in Pasadena, California. I leave out the discoveries of the electron by J. J. Thomson, the nucleus and the proton by Ernest Rutherford, as well as the photon introduced by Albert Einstein and the neutrino as hypothesized by Wolfgang Pauli, as having occurred before my time.'' I was thus able to follow -- and sometimes participate in -- all the developments of modern particle physics. The story I will tell is as the unfolding of the field looked; to me -- an experimental particle physicists. As with Rashomon, this is as I see it. To get a different point of view, and no doubt there are many, you need different observer. One might ask, what did I know about physics in the 1930s, anyway It so happens that I did hear abut Chadwick's discovery at the time, mainly because my brother Maurice was working with him in 1934 on the photo-disintegration of the deuteron, and on the first good measurement of the neutron mass. I will concentrate on the thirty years, 1930 to …
Date:
July 1, 1990
Creator:
Goldhaber, G.
Object Type:
Article
System:
The UNT Digital Library
Functional description of the West Valley Demonstration Project Vitrification Facility
The primary objective of the West Valley Demonstration Project (WVDP) is the solidification of approximately 2.1 million liters (560,000 gallons) of high-level radioactive waste (HLW) which resulted from the operation of a nuclear fuel reprocessing plant. Since the original plant was not built to accommodate the processing of waste beyond storage in underground tanks, HLW solidification by vitrification presented numerous engineering challenges. Existing facilities required redesign and conversion to meet their new purpose. Vitrification technology and systems needed to be created and then tested. Equipment modifications, identified from cold test results, were incorporated into the final equipment configuration to be used for radioactive (hot) operations. Cold operations have defined the correct sequence and optimal functioning of the equipment to be used for vitrification and have verified the process by which waste will be solidified into borosilicate glass.
Date:
July 1, 1990
Creator:
Borisch, R. R. & McMahon, C. L.
Object Type:
Report
System:
The UNT Digital Library
ß-Functions in the Presence of Linear Coupling
None
Date:
July 1, 1990
Creator:
Parzen, G.
Object Type:
Report
System:
The UNT Digital Library
The Gayly Oklahoman (Oklahoma City, Okla.), Vol. 8, No. 8, Ed. 1 Sunday, July 1, 1990
Semi-monthly newspaper from Oklahoma City, Oklahoma that includes local, state, and national news and advertising of interest to the Lesbian, Gay, Bisexual, and Transgender (LGBT) community.
Date:
July 1, 1990
Creator:
Shaffer, Ron & Hawkins, Don
Object Type:
Newspaper
System:
The UNT Digital Library
General Dynamics World, Volume 20, Number 7, July 1990
Monthly newsletter published for employees of the General Dynamics Corporation containing work-related information, updates about employees, and other news.
Date:
July 1990
Creator:
General Dynamics Corporation
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
General Store and Café
Photograph of the exterior of the General Store and Café.
Date:
July 1990
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
General Store and Café
Photograph of the exterior of the General Store and Café.
Date:
July 1990
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
General Store and Café
Photograph of the exterior of the General Store and Café.
Date:
July 1990
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
General Store and Café
Photograph of the exterior of the General Store and Café.
Date:
July 1990
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
General Store and Café
Photograph of the exterior of the General Store and Café.
Date:
July 1990
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History