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Evaluation of Internal Criticality of the Plutonium Dispostion MOX SNF Waste Form

Description: The purpose of this calculation is to perform a parametric study to determine the effects of fission product leaching, assembly collapse, and iron oxide loss ({Delta}Fe{sub 2}O{sub 3}) on the reactivity of a waste package (WP) containing mixed oxide (MOX) spent nuclear fuel (SNF). Previous calculations (CRWMS M&O 1998a) have shown that the criticality control features of the WP are adequate to prevent criticality of a flooded WP for all the enrichment/burnup pairs expected for the MOX SNF. … more
Date: September 28, 1999
Creator: Alsaed, Abdelhalim A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

EQ6 Calculations for Chemical Degradation of Navy Waste Packages

Description: The Monitored Geologic Repository Waste Package Operations of the Civilian Radioactive Waste Management System Management & Operating Contractor (CRWMS M&O) performed calculations to provide input for disposal of spent nuclear fuel (SNF) from the Navy (Refs. 1 and 2). The Navy SNF has been considered for disposal at the potential Yucca Mountain site. For some waste packages, the containment may breach (Ref. 3), allowing the influx of water. Water in the waste package may moderate neutrons, … more
Date: November 15, 1999
Creator: LeStrange, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Distribution & Solubility of Radionuclides & Neutron Absorbers in Waste Forms for Disposition of Plutonium Ash & Scraps, Excess Plutonium, and Miscellaneous Spent Nuclear Fuels

Description: The objective of this research is to develop a basic understanding of the distribution and solubility of radionuclides and neutron absorbers in waste forms and their release from waste forms by studying the local structural environments of these constituents in representative materials.
Date: June 1, 1999
Creator: Strachan, Denis M.; Vance, Eric R.; Shuh, David K. & Ewing, Rodney C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Preclosure Criticality Analysis Process Report

Description: The design approach for criticality of the disposal container and waste package will be dictated by existing regulatory requirements. This conclusion is based on the fact that preclosure operations and facilities have significant similarities to existing facilities and operations currently regulated by the NRC. The major difference would be the use of a risk-informed approach with burnup credit. This approach could reduce licensing delays and costs of the repository. The probability of success … more
Date: September 29, 1999
Creator: Thomas, D. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Evaluation of Potential Melt-Dilute/Neutron Absorber Systems for DOE SNF Disposal System

Description: Approximately 50 metric tonnes heavy metal of aluminum-base spent nuclear fuel (Al-SNF) or 30,000 assemblies are being consolidated at the Savannah River Site. The melt-dilute (MD) technology option is being developed to allow ultimate disposal of these fuels in the Monitored Geologic Repository (MGR). Neutron absorbing materials are needed to maintain k{sub eff} less than 0.95 in desired packaging configurations. The aggressive chemical environment in the MGR is expected to lead to the reconfi… more
Date: November 5, 1999
Creator: Vinson, D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Intergrowth structures in synthetic pyrochlores : implications for radiation damage effects and waste form formulation.

Description: Titanate-based ceramic waste forms are currently under development for the immobilization of excess weapons plutonium. Both Hf and Gd are added to the ceramic formulation as neutron absorbers in order to satisfy a defense-in-depth concept for the waste form. The introduction of significant amounts of hafnium may be responsible for the presence of zirconolite-2M crystals in pyrochlore-based ceramics and the formation of zirconolite lamellae within pyrochlore. The zirconolite grows epitaxially on… more
Date: March 30, 1999
Creator: Buck, E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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