809 Matching Results

Results open in a new window/tab.

Holdup measurement for nuclear fuel manufacturing plants (open access)

Holdup measurement for nuclear fuel manufacturing plants

The assay of nuclear material holdup in fuel manufacturing plants is a laborious but often necessary part of completing the material balance. A range of instruments, standards, and a methodology for assaying holdup has been developed. The objectives of holdup measurement are ascertaining the amount, distribution, and how firmly fixed the SNM is. The purposes are reconciliation of material unbalance during or after a manufacturing campaign or plant decommissioning, to decide security requirements, or whether further recovery efforts are justified.
Date: July 13, 1981
Creator: Zucker, M.S.; Degen, M.; Cohen, I.; Gody, A.; Summers, R.; Bisset, P. et al.
Object Type: Article
System: The UNT Digital Library
Fission-product SiC reaction in HTGR fuel (open access)

Fission-product SiC reaction in HTGR fuel

The primary barrier to release of fission product from any of the fuel types into the primary circuit of the HTGR are the coatings on the fuel particles. Both pyrolytic carbon and silicon carbide coatings are very effective in retaining fission gases under normal operating conditions. One of the possible performance limitations which has been observed in irradiation tests of TRISO fuel is chemical interaction of the SiC layer with fission products. This reaction reduces the thickness of the SiC layer in TRISO particles and can lead to release of fission products from the particles if the SiC layer is completely penetrated. The experimental section of this report describes the results of work at General Atomic concerning the reaction of fission products with silicon carbide. The discussion section describes data obtained by various laboratories and includes (1) a description of the fission products which have been found to react with SiC; (2) a description of the kinetics of silicon carbide thinning caused by fission product reaction during out-of-pile thermal gradient heating and the application of these kinetics to in-pile irradiation; and (3) a comparison of silicon carbide thinning in LEU and HEU fuels.
Date: July 13, 1981
Creator: Montgomery, F.
Object Type: Report
System: The UNT Digital Library
System for utilizing shale oil fines. [Patent application] (open access)

System for utilizing shale oil fines. [Patent application]

A system is provided for utilizing fines of carbonaceous materials such as particles or pieces of oil shale of about one-half inch or less diameter which are rejected for use in some conventional or prior surface retorting process, which obtains maximum utilization of the energy content of the fines and which produces a waste which is relatively inert and of a size to facilitate disposal. The system includes a cyclone retort which pyrolyzes the fines in the presence of heated gaseous combustion products, the cyclone retort having a first outlet through which vapors can exit that can be cooled to provide oil, and having a second outlet through which spent shale fines are removed. A burner connected to the spent shale outlet of the cyclone retort, burns the spent shale with air, to provide hot combustion products that are carried back to the cyclone retort to supply gaseous combustion products utilized therein. The burner heats the spent shale to a temperature which forms a molten slag, and the molten slag is removed from the burner into a quencher that suddenly cools the molten slag to form granules that are relatively inert and of a size that is convenient to handle …
Date: March 13, 1981
Creator: Harak, A. E.
Object Type: Patent
System: The UNT Digital Library
Effect of low /sup 60/Co dose rates on sister chromatid exchange incidence in the benthic worm. Neanthes arenaceodentata (open access)

Effect of low /sup 60/Co dose rates on sister chromatid exchange incidence in the benthic worm. Neanthes arenaceodentata

The usefulness of sister chromatid exchange (SCE) induction as a measure of low-level radiation effect was examined in a benthic marine worm, Neanthes arenaceodentata. Larvae were exposed to /sup 60/Co radiation for 12 to 24 h at total doses ranging from 0.5 to 309 R and at dose rates from 0.04 to 13 R/h. Animals exposed at intermediate dose rates (0.5, 0.6, 1.25, 2.0, and 2.5 R/h) had SCE frequencies per chromosome about twice that of those receiving no radiation (controls), whereas those exposed at the higher dose rates (7.0 and 13 R/h) had SCE frequencies lower than the controls. Animals exposed at the lower dose rates (0.04 and 0.1 R/h) had lower SCE frequencies than those exposed at intermediate dose rates (and higher SCE frequencies than controls). The length of chromosome pair number one differed among metaphase spreads and was used as an index of chromosome condensation in a given metaphase. Because there is a possibility that chromosome morphology may affect the ability to resolve SCEs, morphology will be monitored in future studies. A preliminary experiment was performed to assess the effects of 2.2 and 11.5 R/h for 24 h on growth and development. Larvae observed at 6 and …
Date: October 13, 1981
Creator: Harrison, F.L. & Rice, D.W. Jr.
Object Type: Report
System: The UNT Digital Library
Extrapolation algorithms and their use for the evaluation of beam-beam effects on the motion and polarization of particles in storage rings (open access)

Extrapolation algorithms and their use for the evaluation of beam-beam effects on the motion and polarization of particles in storage rings

A proposal of using extrapolation algorithms as an analytical - numerical tool for the evaluation of the beam-beam effects in storage rings is formulated. These algorithms already known to experts of Applied Mathematics are described in some detail. Physical models for the beam-beam interaction effects on betatron motion and polarization of a test particle are discussed and put in such a form to allow the application of the extrapolation algorithms.
Date: October 13, 1981
Creator: Pusterla, M.
Object Type: Report
System: The UNT Digital Library

[Photograph 2012.201.B0304B.0309]

Photograph used for a story in the Oklahoma Times newspaper. Caption: "Heading for cover is Elke Johnson as she walks from Children's Memorial hospital this morning during a light rain."
Date: October 13, 1981
Creator: Albright, Bob
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0251.0193]

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "The domes still shine at St. Cyril and Methodius Russian Orthodox Greek Church."
Date: April 13, 1981
Creator: McLaughlin, Al
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0308B.0040]

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Gwen Janssen and her Siren Alert."
Date: September 13, 1981
Creator: unknown
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0232.0093]

Photograph used for a story in the Oklahoma Times newspaper. Caption: "The largest benefit Indian art show and sale ever at the University of Oklahoma took place last weekend to raise money for the American Indian Student Association at OU."
Date: November 13, 1981
Creator: unknown
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0239.0063]

Photograph used for a story in the Oklahoma Times newspaper. Caption: "Brothers Steve Hacker of Oklahoma City and Jeff Hacker of Minco furnish music."
Date: July 13, 1981
Creator: Southerland, Paul
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0251.0714]

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "DANCE COSTUMES - An interesting mix of everyday and unusual items will become costumes for Prairie Dance Theater at its home concert Feb. 27,.."
Date: January 13, 1981
Creator: Miller, Joe
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0553.0526]

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Featured for the third time"
Date: October 13, 1981
Creator: Miller, Joe
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0239.0502]

Photograph used for a story in the Oklahoma Times newspaper. Caption: "Mona Halasek of the OKC Cardinals relaxes by blowing a big bugle while waiting her turn at bat during an ASA women's slow pitch tournament at Garrett's Softball Heaven over the weekend."
Date: June 13, 1981
Creator: Albright, Bob
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0248.0536]

Photograph used for a story in the Oklahoma Times newspaper. Caption: "Tuning up for a concert are members of the Putnam City North student orchestra, Lori Harding, left, Eric Bouwman, Lisa Bonner, and Allen Coe."
Date: February 13, 1981
Creator: Tullous, Don
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0248.0221]

Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Tommy Hansen"
Date: February 13, 1981
Creator: unknown
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0265.0619]

Photograph used for a story in the Oklahoma Times newspaper. Caption: "Katrina Gregg gets support for her "injury," a broken arm."
Date: August 13, 1981
Creator: Beuhner, Jeff
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0248.0218]

Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Tommy Hansen"
Date: February 13, 1981
Creator: unknown
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0261B.0072]

Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Luis Hollander ( Wife of OKC Fire Chief)"
Date: February 13, 1981
Creator: unknown
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0248.0378]

Photograph used for a story in the Oklahoma Times newspaper. Caption: "Guy Hardaker of Jones"
Date: May 13, 1981
Creator: Argo, Jim
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0248.0220]

Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Tommy Hansen"
Date: February 13, 1981
Creator: Longstreath, David
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0265.0615]

Photograph used for a story in the Oklahoma Times newspaper. Caption: "Hospital lab workers Kevin Kraker, left, Dan Hughes and Fred Thomas confer."
Date: August 13, 1981
Creator: Beuhner, Jeff
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0249.0807]

Photograph used for a story in the Oklahoma Times newspaper. Caption: "Edmond senior Robert Harnden works on an musical piece he wrote."
Date: May 13, 1981
Creator: Hennigan, Vincent
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0353.0446]

Photograph used for a story in the Oklahoma Times newspaper. Caption: "Signs posted around Lake Hefner and Kiddies Lake warn sportsmen of potential danger of eating deep-running fish caught in the lakes."
Date: April 13, 1981
Creator: Klock, Roger
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0271.0604]

Photograph used for a story in the Daily Oklahoman newspaper.
Date: February 13, 1981
Creator: unknown
Object Type: Photograph
System: The Gateway to Oklahoma History