Coating processes – Radioactive base or coating
Reexamination Certificate
2006-05-17
2010-02-23
Lightfoot, Elena T (Department: 1792)
Coating processes
Radioactive base or coating
C427S006000, C427S226000, C427S227000, C427S249100, C427S249200, C427S249170, C427S255110, C427S255120, C427S255230, C427S255280
Reexamination Certificate
active
07666463
ABSTRACT:
Methods for manufacturing porous nuclear fuel elements for use in advanced high temperature gas-cooled nuclear reactors (HTGR's). Advanced uranium bi-carbide, uranium tri-carbide and uranium carbonitride nuclear fuels can be used. These fuels have high melting temperatures, high thermal conductivity, and high resistance to erosion by hot hydrogen gas. Tri-carbide fuels, such as (U,Zr,Nb)C, can be fabricated using chemical vapor infiltration (CVI) to simultaneously deposit each of the three separate carbides, e.g., UC, ZrC, and NbC in a single CVI step. By using CVI, a thin coating of nuclear fuel may be deposited inside of a highly porous skeletal structure made, for example, of reticulated vitreous carbon foam.
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Benander Robert E.
Williams Brian E.
Youchison Dennis L.
Lightfoot Elena T
Sandia Corporation
Watson Robert D.
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