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In-Situ, Long-Term Monitoring System for Radioactive Contaminants

Description: This report presents the results of the first phase of the project entitled ''In-situ, Long-term Monitoring System for Radioactive Contaminants.'' Phase one of this effort included four objectives, each with specific success criteria. The first objective was to produce dosimetry grade fibers and rods of aluminum oxide. The success criterion for this milestone was the production of aluminum oxide rods and fibers that have a minimum measurable dose (MMD) of 100 mrem or less. This milestone was co… more
Date: October 1, 2002
Creator: Durham, James S.; McKeever, Stephen W. S. & Akselrod, Mark S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Water Sorption and Gamma Radiolysis Studies for Uranium Oxides

Description: During the development of a standard for the safe, long-term storage of {sup 233}U-containing materials, several areas were identified that needed additional experimental studies. These studies were related to the perceived potential for the radiolytic generation of large pressures or explosive concentrations of gases in storage containers. This report documents the results of studies on the sorption of water by various uranium oxides and on the gamma radiolysis of uranium oxides containing var… more
Date: February 27, 2002
Creator: Icenhour, A.S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analysis of unknown materials with prompt gamma-ray activation analysis (PGAA)

Description: To assay the degradation of high explosives (HE) by a material-loss mechanism, prompt gamma activation analysis (PGAA), using a miniature neutron accelerator developed at Lawrence Berkeley National Laboratory (LBNL) is proposed. Whereas the PGAA signatures from carbon and nitrogen in the chemical matrices are relatively low, fast neutrons may be used due to the higher cross sections for interaction. By using the upgraded PGAA database developed by the Isotope Projects Group at LBNL in collabora… more
Date: September 17, 2002
Creator: English, Gerald & Firestone, Richard
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

In-Situ, Long-Term Monitoring System for Radioactive Contaminants

Description: This report presents the results of the first phase of the project entitled ''In-situ, Long-term Monitoring System for Radioactive Contaminants.'' Phase one of this effort included four objectives, each with specific success criteria. The first objective was to produce dosimetry grade fibers and rods of aluminum oxide. The success criterion for this milestone was the production of aluminum oxide rods and fibers that have a minimum measureable dose (MMD) of 100 mrem or less. This milestone was c… more
Date: October 1, 2002
Creator: Durham, James S.; McKeever, Stephen W. S. & Akselrod, Mark S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Enhanced Polymer Hydrogen Getters for Use in the TRUPACTT-II

Description: Addressing the needs to safely and more efficiently ship Transuranic (TRU) wastes that may generate flammable levels of hydrogen, polymer getters were previously evaluated for deployment in the TRUPACT-II. Subsequently, enhanced polymer getters, collectively known as ''TRUGETTER,'' were formulated and pelletized, then tested against the challenging conditions defined for transport of TRU wastes. Reaction rate, reversibility, compatibility, structure/shape, passivity and capacity were evaluated.… more
Date: June 1, 2002
Creator: Shepodd, Tim
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Graphite Materials Testing in the ATR for Lifetime Management of Magnox Reactors

Description: A major feature of the Magnox gas cooled reactor design is the graphite core, which acts as the moderator but also provides the physical structure for fuel, control rods, instrumentation and coolant gas channels. The lifetime of a graphite core is dependent upon two principal aging processes: irradiation damage and radiolytic oxidation. Irradiation damage from fast neutrons creates lattice defects leading to changes in physical and mechanical properties and the accumulation of stresses. Radioly… more
Date: March 14, 2002
Creator: Grover, S.B. (INEEL) & Metcalfe, M.P. (BNFL, United Kingdom)
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Possible triaxial superdeformation in {sup 174}Hf.

Description: Three, possibly four, regularly spaced rotational bands with large dynamical moments of inertia, which are consistent with known superdeformed bands in the Lu/Hf region, have been identified in {sup 174}Hf. The states were populated in the {sup 130}Te({sup 48}Ca,4n) reaction at a beam energy of 194 MeV. The Gammasphere array detected the emitted gamma radiation. Ultimate cranker calculations predict substantial triaxial deformation ({gamma} {approx} {+-} 17{sup o}) for highly deformed {sup 174}… more
Date: September 18, 2002
Creator: Hartley, D. J.; Djongolov, M.; Riedinger, L. L.; Kondev, F. G.; Janssens, R. V. F.; Abu Saleem, K. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

MCNP Analysis of a Phoswich Detector

Description: A series of triple crystal phosphor sandwich detectors have been developed and constructed for testing at the University of Missouri-Columbia [1-7]. These detectors can simultaneously measure alpha, beta, and gamma radiation and utilize digital pulse shape discrimination to identify and separate radiation events coming from each of the separate phosphors. The research reported here uses Monte Carlo [8] software analysis to determine operating parameters for this detector system and optimizes it… more
Date: June 12, 2002
Creator: Childress, Nathan & Miller, William H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

MCNP Analysis and Optimization of a Triple Crystal Phoswich Detector

Description: Researchers at the University of Missouri-Columbia have designed a triple crystal phoswich detector that allows for simultaneous detection of alpha, beta, and gamma radiation. A ZnS:Ag layer detects alpha particles, a CaF2:Eu scintillator preferentially interacts with beta particles, and a NaI:Tl cell is used for gamma detection. The detector output is digitally collected, processed, and analyzed by a personal computer using custom software. MCNP simulations of this detector found that the phos… more
Date: September 1, 2002
Creator: Miller, William H. & Childress, Nathan L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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