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    ROBUST NUCLEAR PROPULSION FISSION REACTOR WITH TRI-PITCH PATTERNED CORE AND DRUM ABSORBERS
    1.
    发明申请
    ROBUST NUCLEAR PROPULSION FISSION REACTOR WITH TRI-PITCH PATTERNED CORE AND DRUM ABSORBERS 审中-公开

    公开(公告)号：WO2021071599A2

    公开(公告)日：2021-04-15

    申请号：PCT/US2020/047722

    申请日：2020-08-25

    Applicant: BWXT ADVANCED TECHNOLOGIES LLC

    Inventor： GRAMLICH, Craig D. ,  FISHER, Benjamin D. ,  RUSSELL II, William E.

    IPC: G21D5/06 ,  G21D5/02 ,  B64G1/40

    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 upper and lower 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.

    REACTOR DESIGN WITH CONTROLLED THERMAL NEUTRON FLUX FOR ENHANCED NEUTRON ACTIVATION POTENTIAL
    2.
    发明申请
    REACTOR DESIGN WITH CONTROLLED THERMAL NEUTRON FLUX FOR ENHANCED NEUTRON ACTIVATION POTENTIAL 审中-公开

    公开(公告)号：WO2021163006A1

    公开(公告)日：2021-08-19

    申请号：PCT/US2021/017161

    申请日：2021-02-09

    Applicant: BWXT ADVANCED TECHNOLOGIES LLC

    Inventor： GRAMLICH, Craig D. ,  RUSSELL, William E., II

    IPC: G21C3/34 ,  G21C3/322 ,  G21C3/32 ,  G21C3/328 ,  G21C3/33

    Abstract: Reactor core and thermal neutron fission reactor has fuel rods with a composite fuel composition (each having the same uniform cross-section along their axial length), end plates at first and second ends, and intermediate support plates located along a longitudinal length of the reactor core. In a radial cross-section, the fuel rods are arranged at nodes of a hexagonal pitch arrangement, in which the nodes are in a spaced-apart arrangement and interconnected by ligaments. Openings between the nodes form part of a coolant flow path through the thermal neutron reactor core. At least two of the nodes of the hexagonal pitch arrangement are sized to allow insertion, translation, removal, or a combination thereof of auxiliary equipment, such as a target delivery system (TDS) for isotopes. Thermal neutron flux (neutrons ≤ 0.06 eV) is maximized for maximum neutron activation potential, which is applied to produce both commercial and research isotopes.

    MOLTEN METAL FUEL BUFFER IN FISSION REACTOR AND METHOD OF MANUFACTURE
    3.
    发明申请
    MOLTEN METAL FUEL BUFFER IN FISSION REACTOR AND METHOD OF MANUFACTURE 审中-公开

    公开(公告)号：WO2020214873A1

    公开(公告)日：2020-10-22

    申请号：PCT/US2020/028615

    申请日：2020-04-17

    Applicant: BWXT ADVANCED TECHNOLOGIES LLC

    Inventor： GRAMLICH, Craig D.

    IPC: G21C1/03

    Abstract: Fission reactor has a cladding encasing a heat generating source including a fissionable nuclear fuel composition. The heat generating source is offset from the surface of the cladding and molten metal is located within the void space formed by the offset. As a liquid, the molten metal will flow and occupy any contiguous network of void space within the fuel cavity and provides thermal transfer contact between the heat generating source and the cladding. The cladding separates the heat generating source and the molten metal from the primary coolant volume.

    FUNCTIONALLY GRADED LATTICE CERMET FUEL STRUCTURE
    4.
    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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