Texas Register, Volume 22, Number 30, Pages 3639-3680, April 22, 1997 (open access)

Texas Register, Volume 22, Number 30, Pages 3639-3680, April 22, 1997

A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.
Date: April 22, 1997
Creator: Texas. Secretary of State.
Object Type: Journal/Magazine/Newsletter
System: The Portal to Texas History
Railroad Retirement: Forfeitures of Benefits and Contributions by Workers Leaving the Industry (open access)

Railroad Retirement: Forfeitures of Benefits and Contributions by Workers Leaving the Industry

None
Date: April 22, 1997
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Development of a ceramic form for immobilization of excess plutonium (open access)

Development of a ceramic form for immobilization of excess plutonium

Between 8 and 50 metric tonnes of excess plutonium are currently planned to be immobilized in a glass or ceramic waste form in the US. The immobilized Pu would then be encased in HLW glass (the can-in-canister alternative), which would provide a radiation barrier to enhance the proliferation resistance of the material. Associated with the plutonium are about 15 metric tonnes of uranium primarily {sup 238}U and a variety of other impurities (primarily Ga, Mo, Al, Mg, Si, and Cl) totaling about 1 metric tonne or less. Immobilization of this material is complicated by the fact that the uranium content in the various feed streams varies widely, from 0 to about 95%. The proposed ceramic form is composed of about 90% zirconolite (CaZrTi{sub 2}O{sub 7}) and/or pyrochlore (CaPuTi{sub 2}O{sub 7}) with about 10% other phases, typically hollandite (BaAl{sub 2}Ti{sub 6}O{sub 16}) and rutile (TiO{sub 2}). The form is a variation of Synroc-C, which contains nominally 30% zirconolite, 30% perovskite, 30% hollandite, and 10% rutile and noble metal alloys. Zirconolite and perovskite are the actinide host phases in Synroc-C with zirconolite being the more durable phase. The pyrochlore structure is closely related to zirconolite and forms at higher actinide loadings. Thus, …
Date: April 22, 1997
Creator: Van Konynenburg, R.; Ebbinghaus, B.; Ryerson, F.; Shaw, H. & Curtis, P.
Object Type: Article
System: The UNT Digital Library
Mixing materials within zone boundaries using shape overlays (open access)

Mixing materials within zone boundaries using shape overlays

Shape overlays provide a means of statically imposing a physical region containing specified material properties onto a zoned mesh. In the most general case, material interface boundaries are unrelated to mesh zone boundaries, causing zones to contain a mixture of materials, and the mesh itself is not uniform in physical space. We develop and apply an algorithm for shape overlays on nonorthogonal, nonuniform meshes in two dimensions. Examples of shape generation in a multiblock uid dynamics code are shown.
Date: April 22, 1997
Creator: Grandy, J.
Object Type: Report
System: The UNT Digital Library
Focus Report, Volume 75, Number 14, April 1997 (open access)

Focus Report, Volume 75, Number 14, April 1997

Report on affirmative action in Texas after the Fifth Circuit Court of Appeals decision in Hopwood v. University of Texas School of Law.
Date: April 22, 1997
Creator: Texas. Legislature. House of Representatives. Research Organization.
Object Type: Journal/Magazine/Newsletter
System: The Portal to Texas History