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    PHOTON PROPAGATION MODIFIED ADDITIVE MANUFACTURING COMPOSITIONS AND METHODS OF ADDITIVE MANUFACTURING USING SAME
    1.
    发明申请
    PHOTON PROPAGATION MODIFIED ADDITIVE MANUFACTURING COMPOSITIONS AND METHODS OF ADDITIVE MANUFACTURING USING SAME 审中-公开

    公开(公告)号：WO2022098613A1

    公开(公告)日：2022-05-12

    申请号：PCT/US2021/057644

    申请日：2021-11-02

    Applicant: BWXT ADVANCED TECHNOLOGIES LLC

    Inventor： SALASIN, John R. ,  FISHER, Benjamin D.

    IPC: B29C64/165 ,  B33Y10/00 ,  B33Y70/00 ,  G21F5/008

    Abstract: Additive manufacturing compositions include low-absorbing particles or non-absorbing particles that have an absorbance for wavelengths of 300 nm to 700 nm that is equal to or greater than 0 Au and is less 1.0 Au, such as 0.001 Au ≤ absorbance ≤ 0.7 Au. Slurries including such particles and an uranium-containing particle and that are used in additive manufacturing processes have an increased penetration depth for curative radiation. Removal of low-absorbing particles or non-absorbing particles during post-processing of as-manufactured products results in pores that create porosity in the as-manufactured product that provide a volume accommodating fission gases and/or can enhance wicking of certain heat pipe coolant liquids. Low-absorbing particles or non-absorbing particles can be functionalized for improved properties, for example, with fissionable material for improved ceramic yields, with burnable poisons or stabilizers for increased homogeneity, with stabilizers for localized delivery of the stabilizer, or with combinations thereof.

    FUNCTIONALLY GRADED LATTICE CERMET FUEL STRUCTURE
    3.
    发明申请
    FUNCTIONALLY GRADED LATTICE CERMET FUEL STRUCTURE 审中-公开

    公开(公告)号：WO2021002903A3

    公开(公告)日：2021-01-07

    申请号：PCT/US2020/025948

    申请日：2020-03-31

    Applicant: BWXT ADVANCED TECHNOLOGIES LLC

    Inventor： FISHER, Benjamin D. ,  SALASIN, John R. ,  GRAMLICH, Craig D. ,  WITTER, Jonathan K.

    IPC: G21C21/02 ,  G21C3/64 ,  G21C3/58 ,  G21C3/30 ,  G21C3/02

    Abstract: Nuclear propulsion fission reactor structure has an active core region including fuel element structures, a reflector with rotatable neutron absorber structures (such as drum absorbers), and a core former conformal mating the outer surface of the fuel element structures to the reflector. Fuel element structures are arranged abutting nearest neighbor fuel element structures in a tri-pitch design. Cladding bodies defining coolant channels are inserted into and joined to lower and upper core plates to from a continuous structure that is a first portion of the containment structure. The nuclear propulsion fission reactor structure can be incorporated into a nuclear thermal propulsion engine for propulsion applications, such as space propulsion.

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