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    FUEL BUNDLE WITH TWISTED RIBBON FUEL RODLETS FOR NUCLEAR THERMAL PROPULSION APPLICATIONS, STRUCTURES FOR MANUFACTURE, AND METHODS OF MANUFACTURE
    1.
    发明公开
    FUEL BUNDLE WITH TWISTED RIBBON FUEL RODLETS FOR NUCLEAR THERMAL PROPULSION APPLICATIONS, STRUCTURES FOR MANUFACTURE, AND METHODS OF MANUFACTURE 审中-公开

    公开(公告)号：US20230282374A1

    公开(公告)日：2023-09-07

    申请号：US18118206

    申请日：2023-03-07

    申请人： BWXT Advanced Technologies LLC

    发明人： Benjamin D. FISHER ,  John R. SALASIN ,  Marilyn I. DELGADO

    IPC分类号： G21C3/322

    CPC分类号： G21C3/322

    摘要： Fuel bundle has plurality of twisted ribbon fuel rodlets arranged hexagonal packing or circle packing arrangement in a reactor core encased in a multilayer casing. Arrangement of twisted ribbon fuel rodlets is facilitated by rodlet seating fixture with seating surface having a plurality of protrusions that form a receiving space for ends of the twisted ribbon fuel rodlets. Manufacture of the fuel bundle incorporates fiber manufacturing technologies and, optionally, infiltration of spaces in the reactor core by infiltrant. Twisted ribbon fuel rodlet manufacturing system has sub-systems that impart twist periodicity to extruded ribbons, inspect twisted extruded ribbons, and cut twisted extruded ribbons to length. Inspection sorts twisted ribbon fuel rodlets as well as provides feedback to adjust operation of sub-systems. The fuel bundle (and optional fuel bundle support) can be incorporated into a fuel assembly of nuclear propulsion fission reactor structure of, for example, a nuclear thermal propulsion engine.