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303
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Some Scoping Experiments for a Space Reactor
Some scoping experiments were performed to evaluate fuel performance in a lithium heat pipe reactor operating at a nominal 1500K heat pipe temperature. Fuel-coolant and fuel-coolant-clad relationships showed that once a failed heat pipe occurs temperatures can rise high enough so that large concentrations of uranium can be transported by the vapor phase. Upon condensation this uranium would be capable of penetrating heat pipes adjacent to the failed pipe. The potential for propagation of failure exists with UO/sub 2/ and a lithium heat pipe. Changing the composition of the metal of the heat pipe would have only a second order effect on the kinetics of the failure mechanism. Uranium carbide and nitride were considered as potential fuels which are nonreactive in a lithium environment. At high temperatures the nitride would be favored because of its better compatibility with potential cladding materials. Compositions of UN with small additions of YN appear to offer very attractive properties for a compact high temperature high power density reactor.
Date:
July 7, 1983
Creator:
Alexander, C. A. & Ogden, J. S.
Object Type:
Report
System:
The UNT Digital Library
MFTF-B quasi-optical ECRH transmission system
The microwave transmission system for ERCH on MFTF-B will utilize quasi-optical transmission techniques. The system consists of ten gyrotron oscillators: two gyrotrons at 28 GHz, two at 35 GHz, and six at 56 GHz. The 28 and 35 GHz gyrotrons both heat the electrons in the end plug (potential peak) while the 56 GHz sources heat the minimum-B anchor region (potential minimum). Microwaves are launched into a pair of cylindrical mirrors that form a pseudo-cavity which directs the microwaves through the plasma numerous times before they are lost out of the cavity. The cavity allows the microwave beam to reach the resonance zone over a wide range of plasma densities and temperatures. The fundamental electron cyclotron resonance moves to higher axial positions as a result of beta-depression of the magnetic field, doppler shifting of the resonance, and relativistic mass corrections for the electrons. With this system the microwave beam will reach the resonance surface at the correct angle of incidence for any density or temperature without active aiming of the antennas. The cavity also allows the beam to make multiple passes through the plasma to increase the heating efficiency at low temperatures and densities when the single pass absorption is …
Date:
November 7, 1983
Creator:
Yugo, J. J.; Shearer, J. W. & Ziolkowski, R. W.
Object Type:
Article
System:
The UNT Digital Library
Superconducting (radiation hardened) magnets for mirror fusion devices
Superconducting magnets for mirror fusion have evolved considerably since the Baseball II magnet in 1970. Recently, the Mirror Fusion Test Facility (MFTF-B) yin-yang has been tested to a full field of 7.7 T with radial dimensions representative of a full scale reactor. Now the emphasis has turned to the manufacture of very high field solenoids (choke coils) that are placed between the tandem mirror central cell and the yin-yang anchor-plug set. For MFTF-B the choke coil field reaches 12 T, while in future devices like the MFTF-Upgrade, Fusion Power Demonstration and Mirror Advanced Reactor Study (MARS) reactor the fields are doubled. Besides developing high fields, the magnets must be radiation hardened. Otherwise, thick neutron shields increase the magnet size to an unacceptable weight and cost. Neutron fluences in superconducting magnets must be increased by an order of magnitude or more. Insulators must withstand 10/sup 10/ to 10/sup 11/ rads, while magnet stability must be retained after the copper has been exposed to fluence above 10/sup 19/ neutrons/cm/sup 2/.
Date:
December 7, 1983
Creator:
Henning, C. D.; Dalder, E. N. C.; Miller, J. R. & Perkins, J. R.
Object Type:
Article
System:
The UNT Digital Library
[Photograph 2012.201.B0114.0400]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
July 7, 1983
Creator:
Gooch, Steve
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0101.0409]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
November 7, 1983
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0095.0219]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Jarman coach Dick Bobier yells encouragement for one of his junior high wrestlers."
Date:
January 7, 1983
Creator:
Hoke, Doug
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0119A.0032]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Stan Byers, a craftsman 'of native American work entertains while he produces beads, belts and other goods in his authentic Indian teepee at a modern -day trapper rendezvous that draws fans of early American living..."
Date:
June 7, 1983
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0144.0364]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Red Cross volunteer Lisa Durham interviews Jerrold Cortez, who was displaced by the blast."
Date:
April 7, 1983
Creator:
Lynn, Renee
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0146.0161]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Jo Dawn Cowan - Balko - 1st."
Date:
May 7, 1983
Creator:
Wilson, George R.
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0142.0623]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Danny Cooksey, Singer"
Date:
July 7, 1983
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0170.0333]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Benny Ross, Oklahoma Telephone & Telegraph Co. acting manager, right, adjusts wiring on a "main frame" panel inside the company's Dustin Headquarters, which is shown in the above shot."
Date:
December 7, 1983
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0138.0023]
Photograph used for a story in the Daily Oklahoman newspaper.
Date:
April 7, 1983
Creator:
Lynn, Renee
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0138.0024]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Oklahoma City mayor-elect Andy Coats describes his new job as "perhaps the best of all possible worlds."
Date:
April 7, 1983
Creator:
Lynn, Renee
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0138.0056]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
April 7, 1983
Creator:
Lynn, Renee
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0147.0281]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Longtime friends Ron Cox, left, and Jerry Bryan are recuperation in the burn ward of Baptist Medical Center."
Date:
April 7, 1983
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0325.0232]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Don and Joan Snyder chat with Mary and Bill Keller during the Geology Wave's Couples Luau."
Date:
October 7, 1983
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0354.0187]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "The main attraction Saturday at the state high school track meet in Moore was legs."
Date:
May 7, 1983
Creator:
Wilson, George R.
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0329.0338]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "(Artist) Kelly Killough dose a caricature of Chris Salyer as Penny Salyer watches."
Date:
April 7, 1983
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0231.0439]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Gulfstream aerospace employee Don Berry works on the fuselage build-up stage of production."
Date:
December 7, 1983
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0257.0256]
Photograph used for a story in the Daily Oklahoman newspaper.
Date:
February 7, 1983
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0328.0156]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Hollis Ketcham - Hinton"
Date:
April 7, 1983
Creator:
Southerland, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0328.0155]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Hollis Ketcham of Hinton attracts his burros with a piece of bread."
Date:
April 7, 1983
Creator:
Southerland, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0313B.0508]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Roberta Jennings and Hope Asbury serve guests at the Pavarotti dedication reception."
Date:
January 7, 1983
Creator:
Lynn, Renee
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0323.0175]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Downtown business district of Old Kaw City, early 1940."
Date:
August 7, 1983
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History