Extrusion Development Report
This report describes a fuel extrusion process developed under a cooperative research and development agreement (CRADA) between TerraPower, LLC, and Idaho National Laboratory.
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Engineering topics
Mackowiak, Brady
Publications and source records attributed to Mackowiak, Brady.
Co-Extrusion of Zr Lined U-Zr Alloy Characterization Report
A feasibility study was undertaken to assess the feasibility of co-extruding U-10Zr and U-6Zr with a zirconium barrier on the outside surface. A U-10Zr and U-6Zr billet was cast, machined, and sealed in a zirconium can. The can was extruded with an extrusion ratio of approximately 35.5. After extrusion the extruded rods were sectioned for easier handling, radiographed, and metallographically examined. Radiography showed the rods to be solid with the exception of one location in the U-6Zr rod. Metallography showed the expected deformed microstructure in the longitudinal direction, although this was much less noticeable in the U-6Zr structure. Also seen in both rods microstructure was a zirconium gradient; the zirconium concentration was higher near the zirconium liner as compared to the interior of the rod. Based on the successful extrusion co-extrusion of U-Zr alloys with a zirconium liner is feasible.
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U-10Mo Mechanical Property Study Results
A uranium-10wt% molybdenum billet was cast using a vacuum induction meting furnace. The uranium was retrieved from ZPPR stockpiles and had previously been coated with a polymeric coating to prevent oxidation. The coating was removed by mechanically removing the exterior surfaces. After casting total carbon analysis, tensile testing, and microstructural testing was performed. Based on the characterization results ZPPR stockpile depleted uranium can be used as a source of depleted uranium if all coating materials are fully removed.
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Casting Development Report for EFF-W Casting Furnace
The Experimental Fuels Facility (EFF) Casting System, which is configured for gravity casting into a permanent mold, was installed to cast billets made up of uranium, uranium alloys, copper and copper alloys, as well as other geometries in support of the TerraPower project. This document describes casting development using.
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