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2024 ANS Annual Conference
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Las Vegas, NV|Mandalay Bay Resort and Casino
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Latest News
Lightbridge announces first U-Zr fuel rod samples extruded at INL
Lightbridge Corporation announced today that it has reached “a critical milestone” in the development of its extruded solid fuel technology. Coupon samples using an alloy of zirconium and depleted uranium—not the high-assay low-enriched uranium (HALEU) that Lightbridge plans to use to manufacture its fuel for the commercial market—were extruded at Idaho National Laboratory’s Materials and Fuels Complex.
R. R. Paguio, S. P. Paguio, C. A. Frederick, A. Nikroo, O. Acenas
Fusion Science and Technology | Volume 49 | Number 4 | May 2006 | Pages 743-749
Technical Paper | Target Fabrication | doi.org/10.13182/FST06-A1195
Articles are hosted by Taylor and Francis Online.
Poly(-methylstyrene) (PAMS) shells are made by microencapsulation and used in the fabrication of a large variety of targets for the inertial confinement fusion (ICF) program. Although this process has previously been developed into production mode, the yield of shells with acceptable sphericity and wall uniformity in the OMEGA size range (800-1000 m) has been poor (~ 18%). We have made improvements in the yield of these shells by modifying the composition of the outer water solution (W2) in the microencapsulation emulsion. This improvement was achieved by increasing the concentration of Poly Vinyl Alcohol (PVA) from 0.3% to 1.0% and an addition of 0.1% Poly Acrylic Acid (PAA). These modifications were aimed at increasing the interfacial surface tension in the emulsion but also appear to have played a role in density matching the components in the PAMS emulsion. These modifications improved the out of round (OOR) and non-concentricity (NC) of the PAMS mandrels resulting in as increase in the yield of target quality batches based on these basic criteria from 18% to over 80%. Meanwhile, the vacuole content and the surface finish of the PAMS shells were not adversely affected by these changes.