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Inherently safe nuclear-driven internal combustion engines (open access)

Inherently safe nuclear-driven internal combustion engines

A family of nuclear driven engines is described in which nuclear energy released by fissioning of uranium or plutonium in a prompt critical assembly is used to heat a working gas. Engine performance is modeled using a code that calculates hydrodynamics, fission energy production, and neutron transport self-consistently. Results are given demonstrating a large negative temperature coefficient that produces self-shutoff of energy production. Reduced fission product inventory and the self-shutoff provide inherent nuclear safety. It is expected that nuclear engine reactor units could be scaled from 100 MW on up. 7 refs., 3 figs.
Date: June 14, 1991
Creator: Alesso, P.; Chow, Tze-Show; Condit, R.; Heidrich, J.; Pettibone, J. & Streit, R.
Object Type: Article
System: The UNT Digital Library
Development of copper sulfide/cadmium sulfide thin film solar cells. First technical progress report, 13 July 1979 to 12 October 1979 (open access)

Development of copper sulfide/cadmium sulfide thin film solar cells. First technical progress report, 13 July 1979 to 12 October 1979

Preparation of CdS films by evaporation from a single graphite source, as generally used by the Institute of Energy Conversion (IEC) group at the University of Delaware, has been implemented. Previously at Westinghouse, four evaporation sources were used to permit uniform coverage of large area substrates. The graphite source used in this period is somewhat smaller than the IEC design to permit accommodation to the heater geometry currently available. Initial efforts with the single source evaporation have been on characterizing the thickness profiles of the deposited films. This is needed to permit selection of conditions for obtaining films of about 30..mu..m thickness over the central 4 cm x 4 cm area of the substrate. Barrier processing according to the details of IEC method has been used on four-source CdS films. To date the best cells have only been about 1% efficient. Low short circuit current density values (approx. 5 mA/cm/sub 2/) have been the biggest problem. Annealing in 6% H/sub 2//Ar mixtures at 170/sup 0/C after electrode grid evaporation generally has resulted in reduced values of J/sub sc/. Plans for the next period include the use of single source films for cell processing and the use of small area diode …
Date: February 14, 1980
Creator: Szedon, J. R.; Shirland, F. A.; Stoll, J. A. & Dickey, H. C.
Object Type: Report
System: The UNT Digital Library
Radiochemical Processing-Off-Site Transportation and Ultimate Storage Problems (open access)

Radiochemical Processing-Off-Site Transportation and Ultimate Storage Problems

Safe and economic methods of handling radioactive materials off-site are required for the successful operation of nuclear chemical plants. These occasions arise in the shipment of spent fuel, radioactive, isotopes, and liquid wastes. An unsolved problem exists in the development of techniques and sites for the final disposal of waste products. (auth)
Date: March 14, 1962
Creator: Blomeke, J. O. & Shappert, L. B.
Object Type: Report
System: The UNT Digital Library
Analysis of the new GCFR upper and lower plenum flow-through shields (open access)

Analysis of the new GCFR upper and lower plenum flow-through shields

Analysis of the proposed GCFR upper and lower plenum flow-through shields has been performed using both discrete ordinate (DOT) and Monte Carlo (MORSE) methods. Several shields having one change of direction in the coolant path (chevron) and two changes of direction (herringbone) were investigated. The shields were modeled as unit cells with periodic boundary conditions. From plenum fluence calculations and design constraints at the reactor vessel liner, it was determined that all the shield configurations analyzed should be adequate for the necessary radiation attenuation.
Date: September 14, 1980
Creator: Cramer, S.N. (Oak Ridge National Lab., TN); Reed, D.A.; Emmett, M.B. & Rouse, C.A.
Object Type: Article
System: The UNT Digital Library
[News Clip: Flag Day] captions transcript

[News Clip: Flag Day]

Video footage from the WBAP-TV station in Fort Worth, Texas to accompany a story about two separate Flag Day celebrations sponsored by the Dallas Elks and the Fort Worth Elks.
Date: June 14, 1964
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Object Type: Video
System: The UNT Digital Library
[News Clip: Race] captions transcript

[News Clip: Race]

Video footage from the WBAP-TV station in Fort Worth, Texas to accompany a story about the winners of the second annual North Texas Water Safari, a canoe race down the Trinity River.
Date: June 14, 1964
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Object Type: Video
System: The UNT Digital Library
[News Clip: Drowning] captions transcript

[News Clip: Drowning]

Video footage from the WBAP-TV station in Fort Worth, Texas to accompany a story about the recovery of the body of Dallas welder Billy Gandey who drowned while swimming in Grapevine Lake.
Date: June 14, 1964
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Object Type: Video
System: The UNT Digital Library
[News Clip: Annie arrives] captions transcript

[News Clip: Annie arrives]

Video footage from the WBAP-TV station in Fort Worth, Texas to accompany a story about actress Ann Blyth, who will play the lead in the Dallas Summer Musical "The Sound of Music, arriving at Love Field airport.
Date: June 14, 1964
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Object Type: Video
System: The UNT Digital Library
[News Clip: Woman honored] captions transcript

[News Clip: Woman honored]

Video footage from the WBAP-TV station in Fort Worth, Texas to accompany a story about the dedication of a vocational training unit donated by Mrs. Neville Penrose to the Fort Worth Society of Crippled Children and Adults.
Date: June 14, 1964
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Object Type: Video
System: The UNT Digital Library
[News Clip: Car accident] captions transcript

[News Clip: Car accident]

Video footage from the WBAP-TV station in Fort Worth, Texas to accompany a news story about a traffic accident.
Date: June 14, 1964
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Object Type: Video
System: The UNT Digital Library
[News Clip: Dallas fatal] captions transcript

[News Clip: Dallas fatal]

Video footage from the WBAP-TV station in Fort Worth, Texas to accompany a story about Walter Bolden of Mount Pleasant who was killed in a two car collision in Dallas.
Date: June 14, 1964
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Object Type: Video
System: The UNT Digital Library
[News Clip: Demonstrators] captions transcript

[News Clip: Demonstrators]

Video footage from the WBAP-TV television station in Fort Worth, Texas, covering a news story about the third week of civil rights demonstrations at the Piccadilly Cafeteria in Dallas, Texas. Demonstrators, including Earl Allen and Steve Hancock, are arrested or obstructing entry to a public building.
Date: June 14, 1964
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Object Type: Video
System: The UNT Digital Library
[News Clip: Little league] captions transcript

[News Clip: Little league]

Video footage from the WBAP-TV station in Fort Worth, Texas to accompany a story about five thousand Little League players accepting an invitation to spend an afternoon with the Fort Worth Cats at La Grave Field. The children play in contests and games with the winners receiving bats, gloves, and autographed baseballs.
Date: June 14, 1964
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Object Type: Video
System: The UNT Digital Library
[News Clip: Ballpark] captions transcript

[News Clip: Ballpark]

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: April 14, 1994, 5:00 p.m.
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Object Type: Video
System: The UNT Digital Library
[News Clip: Republican] captions transcript

[News Clip: Republican]

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story. This story aired at
Date: November 14, 1994, 6:00 p.m.
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Object Type: Video
System: The UNT Digital Library
[News Clip: Dallas jams] captions transcript

[News Clip: Dallas jams]

B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: March 14, 1994, 6:00 p.m.
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Object Type: Video
System: The UNT Digital Library
[News Clip: Body found] captions transcript

[News Clip: Body found]

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: October 14, 1994, 6:00 p.m.
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Object Type: Video
System: The UNT Digital Library
Geothermal aquaculture project: Real Property Systems Inc. , Harney Basin, Oregon (open access)

Geothermal aquaculture project: Real Property Systems Inc. , Harney Basin, Oregon

Real Property Systems Inc., (RPS) owns two parcels in the vicinity of Harney Lake, Oregon. One parcel is 120 acres in size, the other is 200 acres. A study concludes that the 200 acre parcel has the greater potential for geothermal development. RPS is interested in an aquaculture operation that produces fresh water prawns, (Macrobrachium rosenbergii) for the market. To supply the heat necessary to maintain the ideal temperature of 82/sup 0/F desired for these prawns, a geothermal resource having a 150/sup 0/F temperature or higher, is needed. The best estimate is that 150/sup 0/F water can be found from a minimum 1090 feet depth to 2625 feet, with no absolute assurances that sufficient quantities of geothermal waters exist without drilling for the same. This study undertakes the preliminary determination of project economics so that a decision can be made whether or not to proceed with exploratory drilling. The study is based on 10 acres of ponds, with a peak requirement of 2500 gpm of 150/sup 0/F geothermal water.
Date: August 14, 1981
Creator: unknown
Object Type: Report
System: The UNT Digital Library
New approach to regression in certain time/space series problems. Technical report No. 11. [Dose-response relationships for air pollution] (open access)

New approach to regression in certain time/space series problems. Technical report No. 11. [Dose-response relationships for air pollution]

This paper introduces a new method for estimating a dose-response relationship from spatially averaged time series of air pollution and health data. Because time is perceived as a nuisance parameter to be eliminated, least-squares regression and traditional time series methodology (e.g., spectral analysis, Box-Jenkins methods) are rejected in favor of a nonparametric estimation procedure based on observing health effects in times of nearly equal pollution. The method requires estimating the ratio of two density functions and avoids problems of aggregation, linearity, and normality. The procedure seems most useful, at present, as a data analytic and data display device rather than as an inferential tool.
Date: October 14, 1977
Creator: Sager, T W
Object Type: Report
System: The UNT Digital Library
Ex-vessel core catcher design requirements and preliminary concepts evaluation. [LMFBR] (open access)

Ex-vessel core catcher design requirements and preliminary concepts evaluation. [LMFBR]

As part of the overall study of the consequences of a hypothetical failure to scram following loss of pumping power, design requirements and preliminary concepts evaluation of an ex-vessel core catcher (EVCC) were performed. EVCC is the term applied to a class of devices whose primary objective is to provide a stable subcritical and coolable configuration within containment following a postulated accident in which it is assumed that core debris has penetrated the Reactor Vessel and Guard Vessel. Under these assumed conditions a set of functional requirements were developed for an EVCC and several concepts were evaluated. The studies were specifically directed toward the FFTF design considering the restraints imposed by the physical design and construction of the FFTF plant.
Date: June 14, 1974
Creator: Friedland, A.J. & Tilbrook, R.W.
Object Type: Report
System: The UNT Digital Library
Quantitative study of mixing in annular and raschig ring filled tanks (open access)

Quantitative study of mixing in annular and raschig ring filled tanks

A quantitative study of mixing, which utilized the exit age distribution theory, has been completed for bench-scale annular and raschig ring filled tanks, in addition to a pilot-scale annular tank. A study of mixing and fluid flow in a full-scale, single-entry, raschig ring filled tank also was initiated. Results showed the bench-scale raschig ring filled tank approached plug-flow (no mixing) behavior. In a bench-scale annular tank, regardless of whether fluid entered tangentially or nontangentially, the vessel approached continuously stirred tank reactor behavior (perfect mixing). The pilot-scale annular tank approached continuously stirred tank reactor behavior only when tangential entry was used. Mixing in the full-scale raschig ring filled tank he tank did not approach eithr the perfect or the no mixing situations. Instead, the tank had a flow pattern in which solution channeled through a small volume of the tank, leaving the regions outside the channel effectively inactive.
Date: July 14, 1980
Creator: Fredrickson, M. A.
Object Type: Report
System: The UNT Digital Library
The shell model approach: Key to hadron structure (open access)

The shell model approach: Key to hadron structure

A shell model approach leads to a simple constituent quark model for hadron structure in which mesons and baryons consist only of constituent quarks. Hadron masses are the sums of the constituent quark effective masses and a hyperfine interaction inversely proportional to the product of these same masses. Hadron masses and magnetic moments are related by the assumption that the same effective mass parameter appears in the additive mass term, the hyperfine interaction, and the quark magnetic moment, both in mesons and baryons. The analysis pinpoints the physical assumptions needed for each relation and gives two new mass relations. Application to weak decays and recent polarized EMC data confirms conclusions previously obtained that the current quark contribution to the spin structure of the proton vanishes, but without need for the questionable assumption of SU(3) symmetry relating hyperon decays and proton structure. SU(3) symmetry breaking is clarified. 24 refs.
Date: August 14, 1989
Creator: Lipkin, H.J. (Weizmann Inst. of Science, Rehovoth (Israel). Dept. of Nuclear Physics)
Object Type: Article
System: The UNT Digital Library
PWR blowdown heat transfer separate-effects program: thermal-hydraulic test facility experimental data report for test 104 (open access)

PWR blowdown heat transfer separate-effects program: thermal-hydraulic test facility experimental data report for test 104

Reduced instrument responses are presented for Thermal-Hydraulic Test Facility (THTF) test 104, which is part of the ORNL Pressurized-Water Reactor (PWR) Blowdown Heat Transfer Separate-Effects Program. The objective of the program is to investigate the thermal-hydraulic phenomenon governing the energy transfer and transport processes that occur during a loss-of-coolant accident in the PWR system. Test 104 was conducted to obtain CHF in bundle 1 under blowdown conditions. The primary purpose of this report is to make the reduced instrument responses during test 104 available.
Date: February 14, 1978
Creator: Leon, D. M.; White, M. D.; Moore, P. A. & Hedrick, R. A.
Object Type: Report
System: The UNT Digital Library
Combustion of dense streams of coal particles (open access)

Combustion of dense streams of coal particles

Research on coal combustion continued. Activities during November 29, 1991 to February 28, 1992 includes: Further analytical results on char array combustion and internal ignition of porous char; preliminary runs using a flat flame burner have been made and a blue flat flame has been obtained; a CID camera, EPIX frame grabber and software, Sony monitor and a 486 Computer to handle image processing frame by frame have been acquired; a new coal feeder has been constructed for feeding through the flat flame burner. Coal experiments have not yet been conducted. Coal samples from Penn State Coal Bank were also acquired for use in the experiments. They include bituminous and subbituminous coals of differing VM.
Date: April 14, 1992
Creator: Annamalai, K.
Object Type: Report
System: The UNT Digital Library