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Continuous Czochralski growth. Silicon sheet growth development of the large area silicon sheet task of the Low Cost Silicon Solar Array Project. First quarterly progress report, October--December 1977
The development of equipment and processes to produce single crystal solar silicon by a continuous Czochralski method was studied. ''Continuous'' is defined as the ability to produce 100 kilograms of crystal from only one melt container. The equipment to be used is a Hamco CG2000 Production Crystal Grower. Certain modifications will be made to the grower to enable periodic replenishment of silicon into the crucible and removal of grown crystals. The crystal grower was constructed and installed in a separate room designated and prepared for the project. It was adapted with a modified throat, a vacuum-tight isolation valve, an enlarged pull chamber to hold a supply of poly material, and a modified automatic diameter control (ADC) optical system. It was fully tested and made ready for trial runs. Designs are under way for other modifications to the equipment, including a recharge system, a polysilicon attachment device, and a modified bead-chain pull mechanism capable of pulling and simultaneously weighing a 30 to 40 Kg growing crystal. An economic model was developed for batch CZ as a base-line reference, and for two methods of continuous CZ. Preliminary analysis indicates a cost (value added by crystal growth) of approximately $13 to $17 per …
Date:
December 31, 1977
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Validation of the kinetic model for predicting the composition of chlorinated water discharged from power plant cooling systems
The purpose of this report is to present a validation of a previously described kinetic model which was developed to predict the composition of chlorinated fresh water discharged from power plant cooling systems. The model was programmed in two versions: as a stand-alone program and as a part of a unified transport model developed from consistent mathematical models to simulate the dispersion of heated water and radioisotopic and chemical effluents from power plant discharges. The results of testing the model using analytical data taken during operation of the once-through cooling system of the Quad Cities Nuclear Station are described. Calculations are also presented on the Three Mile Island Nuclear Station which uses cooling towers.
Date:
October 31, 1977
Creator:
Lietzke, M. H.
Object Type:
Report
System:
The UNT Digital Library
Role of statistical linearization in the solution of nonlinear stochastic equations
The solution of a generalized Langevin equation is referred to as a stochastic process. If the external forcing function is Gaussian white noise, the forward Kolmogarov equation yields the transition probability density function. Nonlinear problems must be handled by approximation procedures e.g., perturbation theories, eigenfunction expansions, and nonlinear optimization procedures. After some comments on the first two of these, attention is directed to the third, and the method of statistical linearization is used to demonstrate a relation to the former two. Nonlinear stochastic systems exhibiting sustained or forced oscillations and the centered nonlinear Schroedinger equation in the presence of Gaussian white noise excitation are considered as examples. 5 figures, 2 tables. (RWR)
Date:
August 31, 1977
Creator:
Budgor, Aaron B.
Object Type:
Article
System:
The UNT Digital Library
Research in radiobiology. Annual report of work in progress in the internal irradiation program
Separate abstracts were prepared for 13 sections of this report. A list is included of publications during the time period covered by this report.
Date:
March 31, 1977
Creator:
Jee, W.S.S.
Object Type:
Report
System:
The UNT Digital Library
Physiopathology of blood platelets and development of platelets substitutes. Progress report, August 1, 1976--October 31, 1977. [/sup 51/Cr]
Progress is reported on the following research projects: the effect of estrogen on platelet aggregability and thrombus formation; the antithrombotic effect of platelet inhibiting agents in a bench model of artificial kidney; the arrest of hemorrhage in severely alloimmunized thrombocytopenic patients; and in vivo elution of /sup 51/Cr from labeled platelets induced by antibody. (HLW)
Date:
July 31, 1977
Creator:
Baldini, M G
Object Type:
Report
System:
The UNT Digital Library
Engineering assessment of inactive uranium mill tailings, Shiprock site, Shiprock, New Mexico. Phase II, Title I
Ford, Bacon and Davis Utah Inc. has performed an engineering assessment of the problems resulting from the existence of radioactive uranium mill tailings at Shiprock, New Mexico. The Phase II, Title I services include the preparation of topographic maps, the performance of core drillings and radiometric measurements sufficient to determine areas and volumes of tailings and other radium-contaminated materials, the evaluation of resulting radiation exposures of individuals and nearby populations, the investigation of site hydrology and meteorology and the evaluation and costing of alternative corrective actions. Radon gas release from the 1.7 million tons of tailings at the Shiprock site constitutes the most significant environmental impact, although windblown tailings and external gamma radiation are also factors. The 11 alternative actions presented range from completion of the present ongoing EPA site decontamination plan (Option I), to stabilizing in-place with varying depths of cover material (Options II-IV), to removal to an isolated long-term disposal site (Options V-XI). All options include remedial action costs for off-site locations where tailings have been placed. Costs estimates for the 11 options range from $540,000 to $12,500,000. Reprocessing the tailings for uranium is not economically feasible.
Date:
March 31, 1977
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
JBK-75 microstructure specification recommendation. [Modified A-286]
Since the ASTM-E-45 standard for microcleanliness is not applicable to superalloys like JBK-75 stainless steel (Modified A-286), Rocky Flats should adopt the Ladish microcleanliness standard (APML Cleanliness Classification of High Temperature Alloys Chart, 1971), as a guide for setting material acceptance specifications for JBK-75. Inclusion ratings of S-2, N-2, C-2, and M-2 should be acceptable. The microstructure should have a grain size of 5 or finer, but not smaller than 9, and microsegregation (banding) should be kept to a minimum.
Date:
October 31, 1977
Creator:
Brewer, A. W.
Object Type:
Report
System:
The UNT Digital Library
Engineering assessment of inactive uranium mill tailings, Monument Valley site, Monument Valley, Arizona. A summary of the Phase II, Title I
Ford, Bacon and Davis Utah Inc. has performed an engineering assessment of the problems resulting from the existence of radioactive uranium mill tailings at the Monument Valley millsite in Arizona. The Phase II, Title I services include the preparation of topographic maps, the performance of core drillings and radiometric measurements sufficient to determine areas and volumes of tailings and other radium-contaminated materials, the evaluation of resulting radiation exposures of individuals residing nearby, the investigation of site hydrology and meteorology and the evaluation and costing of alternative corrective actions. Radon gas release from the tailings on the site constitutes the most significant environmental impact, although windblown tailings and external gamma radiation are also factors. The sparse population and relatively low radiation levels yield minimal immediate environmental impact; hence, the two alternative actions presented are directed towards restricting access to the site (Options I and II), and returning the windblown tailings to the pile and stabilizing the pile with 2 ft of cover material (Option II). Both options include remedial action costs for offsite locations where tailings have been placed. Cost estimates for the two options are $585,000 and $1,165,000. Reprocessing the tailings for uranium is not economically feasible.
Date:
March 31, 1977
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Solar Pilot Plant, Phase I. Quarterly report No. 5, October--December 1976
Collector subsystem research experiment (SRE) tests were conducted and the data evaluated. Assembly of the SRE steam generator was almost complete. Testing will start in January 1977. Two major changes in the baseline design, sensible thermal heat storage rather than phase-change storage and wet rather than dry cooling of the condenser, were being worked. Analytical and design work on the electrical generation subsystem and plant integration progressed satisfactorily.
Date:
March 31, 1977
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
LOFT pressurizer surge line stress and fatigue life analysis report
A stress analysis was performed on the LOFT pressurizer surge line (hereafter called the surge line) to determine if it met the requirements of the ASME BPV Code Section III, for Class 1 components. Dead weight, thermal expansion, seismic, design LOCE and LOCA loads were considered. After the addition of restraints (specified in letter, HIK-12-75, ''LOFT Pipe Hanger Requirements on Main Feed, Main Steam, Pressurizer, and ECC Systems,'' Nov. 24, 1975) the primary and secondary stress levels were found to be acceptable.
Date:
May 31, 1977
Creator:
Muffett, J.W.
Object Type:
Report
System:
The UNT Digital Library
Measuring and Predicting the Dynamic Effects of a Confined Thin Metal Plate Pulse Heated Into the Liquid-Vapor Regime
The dynamic response of a confined thin layer of lead heated rapidly and uniformly to a supercritical state was investigated. Lead targets 0.025 mm and 0.05 mm thick were contained between a thin titanium tamping layer and a thick layer of fused quartz with several different gap widths between the lead and the confining surfaces. After being heated by an electron beam for about 50 ns, lead specimens expanded to a state of approximately half liquid and half vapor. Measurements of the stress in the quartz and the velocity of the tamper produced by the expanding lead were compared with one dimensional hydrodynamic computer program predictions. Measured and predicted peak stresses in the quartz for no gaps were approximately 12 kilobars and agreed within one kilobar. Peak stresses decreased rapidly with gap size to values, at 0.02 mm gaps, of about one kilobar for the 0.025 mm lead targets and five kilobars for the 0.05 mm targets. These values were confirmed by measurements. Predictions and measurements of tamper velocity (momentum) were within 10% only when the lead and confining walls were in close contact. The observed velocities for even very small gaps were substantially below predictions. These differences are attributed …
Date:
December 31, 1977
Creator:
Baxter, R. C.
Object Type:
Report
System:
The UNT Digital Library
Phase II, Title I engineering assessment of inactive uranium mill tailings, Monument Valley site, Monument Valley, Arizona. [Environmental effects, health hazards, and options for stabilization of tailings or fencing of site]
An engineering assessment was made of the problems resulting from the existence of radioactive uranium mill tailings at the Monument Valley millsite in Arizona. The Phase II, Title I services include the preparation of topographic maps, the performance of core drillings and radiometric measurements sufficient to determine areas and volumes of tailings and other radium-contaminated materials, the evaluation of resulting radiation exposures of individuals residing nearby, the investigation of site hydrology and meteorology and the evaluation and costing of alternative corrective actions. Radon gas release from the tailings on the site constitutes the most significant environmental impact, although windblown tailings and external gamma radiation are also factors. The sparse population and relatively low radiation levels yield minimal immediate environmental impact; hence, the two alternative actions presented are directed towards restricting access to the site and returning the windblown tailings to the pile and stabilizing the pile. Both options include remedial action costs for offsite locations where tailings have been placed. Cost estimates for the two options are $585,000 and $1,165,000.
Date:
March 31, 1977
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Viscosity of brines from the Salton Sea Geothermal Field, Imperial Valley, California
The viscosity of chemically analyzed brines from the Salton Sea Geothermal Field was measured from 5 to 90/sup 0/C at 100 kPa. Data indicate that these multicomponent solutions are slightly more viscous than a 3.5 molal NaCl solution in this temperature interval.
Date:
October 31, 1977
Creator:
Piwinskii, A.J.; Netherton, R. & Chan, M.
Object Type:
Report
System:
The UNT Digital Library
[Photograph 2012.201.B0053.0405]
Photograph taken for a newspaper owned by the Oklahoma Publishing Company. Caption: "Driver Darrell Blankeship escaped injury about 10:30 AM today when his Oklahoma Transportation Department mowing machine overturned and burst into flames at the SE 15 overpass on I-35."
Date:
October 31, 1977
Creator:
White, Perry
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0142.0400]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Oklahoma City Manager Jim Cook doesn't deny the city could have leased office space cheaper a block from city hall than the space it will lease in the nearby Wilmore Building."
Date:
March 31, 1977
Creator:
Albright, Bob
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0136.0307]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Ruby Collier, left, and Thelma Wolfe, co-chairmen of the Classen Senior Center's annual Christmas Bazaar, look over some of the items that will be on sale from 8:30 a.m. to 8:30 P.m. at the center 912 NW 13th, Friday."
Date:
October 31, 1977
Creator:
Miller, Joe
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0140.0243]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
May 31, 1977
Creator:
Klock, Roger
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0174.0184]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Edmond is trying to sell its old municipal swimming pool for $220,000."
Date:
August 31, 1977
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0140.0242]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
May 31, 1977
Creator:
Klock, Roger
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0135.0826]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Pat Clark"
Date:
August 31, 1977
Creator:
Tullous, Don
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0138.0709]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
May 31, 1977
Creator:
Klock, Roger
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0146.0079]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Sam Coury, land developer & dentist."
Date:
May 31, 1977
Creator:
Klock, Roger
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0328.0246]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Newly appointed Oklahoma County Assessor George Keyes fired six employees Thursday in what he termed a reorganization of his office in order to improve its efficiency."
Date:
August 31, 1977
Creator:
Hoke, Doug
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0291B.0077]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Mike Hinchey (Northwest H. S. )"
Date:
August 31, 1977
Creator:
Southerland, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History