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1.发明授权公开(公告)号：US12288625B2
公开(公告)日：2025-04-29
申请号：US18386378
申请日：2023-11-02
Applicant: BWXT Advanced Technologies LLC
Inventor： Craig D. Gramlich , William E. Russell, II
IPC: G21C3/334 , G21C5/02 , G21C5/06 , G21C5/10 , G21C23/00 , G21G1/02 , G21C3/16 , G21C7/08 , G21C11/06
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.
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公开(公告)号：US12159726B2
公开(公告)日：2024-12-03
申请号：US18378680
申请日：2023-10-11
Applicant: BWXT Advanced Technologies LLC
Inventor： Benjamin D. Fisher , John R. Salasin , Craig D. Gramlich , Jonathan K. Witter
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 body of the fuel element has a structure with a shape corresponding to a mathematically-based periodic solid, such as a triply periodic minimal surface (TPMS) in a gyroid 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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公开(公告)号：US11424041B2
公开(公告)日：2022-08-23
申请号：US16835388
申请日：2020-03-31
Applicant: BWXT Advanced Technologies LLC
Inventor： Benjamin D. Fisher , John R. Salasin , Craig D. Gramlich , Jonathan K. Witter
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 body of the fuel element has a structure with a shape corresponding to a mathematically-based periodic solid, such as a triply periodic minimal surface (TPMS) in a gyroid 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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公开(公告)号：US12159727B2
公开(公告)日：2024-12-03
申请号：US18378691
申请日：2023-10-11
Applicant: BWXT Advanced Technologies LLC
Inventor： Benjamin D. Fisher , John R. Salasin , Craig D. Gramlich , Jonathan K. Witter
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 body of the fuel element has a structure with a shape corresponding to a mathematically-based periodic solid, such as a triply periodic minimal surface (TPMS) in a gyroid 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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Patent Agency Ranking
5.发明授权公开(公告)号：US11848112B2
公开(公告)日：2023-12-19
申请号：US17169679
申请日：2021-02-08
Applicant: BWXT Advanced Technologies LLC
Inventor： Craig D. Gramlich , William E. Russell, II
CPC classification number: G21C5/02 , G21C5/06 , G21C5/10 , G21C23/00 , G21G1/02 , G21C3/16 , G21C7/08 , G21C11/06
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.
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6.发明授权公开(公告)号：US11990248B2
公开(公告)日：2024-05-21
申请号：US16999244
申请日：2020-08-21
Applicant: BWXT Advanced Technologies LLC
Inventor： Craig D. Gramlich , Benjamin D. Fisher , William E. Russell, II
CPC classification number: G21C17/102 , G21C3/04 , G21C19/30 , B64G1/408 , B64G1/422
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.
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公开(公告)号：US11942229B2
公开(公告)日：2024-03-26
申请号：US16851142
申请日：2020-04-17
Applicant: BWXT Advanced Technologies LLC
Inventor： Craig D. Gramlich
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.
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公开(公告)号：US11817225B2
公开(公告)日：2023-11-14
申请号：US17852434
申请日：2022-06-29
Applicant: BWXT Advanced Technologies LLC
Inventor： Benjamin D. Fisher , John R. Salasin , Craig D. Gramlich , Jonathan K. Witter
CPC classification number: G21C3/044 , G21C3/04 , G21C3/42 , G21C3/28 , G21C3/30 , G21C21/02 , G21D5/02
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 body of the fuel element has a structure with a shape corresponding to a mathematically-based periodic solid, such as a triply periodic minimal surface (TPMS) in a gyroid 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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公开(公告)号：US11495363B2
公开(公告)日：2022-11-08
申请号：US16864178
申请日：2020-05-01
Applicant: BWXT Advanced Technologies LLC
Inventor： Craig D. Gramlich , William E. Russell, II
Abstract: A mobile modular reactor, in particular, a graphite-moderated fission reactor, has an active core region and at least a portion of control region(s) that are located within an interior volume of a pressure vessel. Flow annulus features located in the flow annulus between an outer surface of the control rod/fuel rod and an inner surface of the cladding of the channel in which the rod is located stabilizes the flow annulus and maintains a reliable concentricity between the inner and outer claddings that envelope the flow annulus. Flow annulus features are equally circumferentially spaced at longitudinally separated locations and the flow annulus features at successive, longitudinally separated locations are rotationally offset relative to each other. For purposes of transportability, the pressure vessel is sized for mobile transport using a ship, train or truck, for example, by fitting within a shipping container.
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