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公开(公告)号：US20240038405A1
公开(公告)日：2024-02-01
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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2.发明公开
公开(公告)号：US20240001607A1
公开(公告)日：2024-01-04
申请号：US18234492
申请日：2023-08-16
Applicant: BWXT Advanced Technologies LLC
Inventor： John R. SALASIN , Benjamin D. FISHER
IPC: B29C64/165 , G21C3/50 , C08K3/22 , C08K3/08 , C08F2/46 , B33Y10/00 , B33Y70/10 , B33Y80/00 , C08F2/08 , C08F22/10
CPC classification number: B29C64/165 , G21C3/50 , C08K3/22 , C08K3/08 , C08F2/46 , B33Y10/00 , B33Y70/10 , B33Y80/00 , C08F2/08 , C08F22/1006 , C08K2003/0856 , C08K2201/003
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 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.
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3.发明公开
公开(公告)号：US20230339175A1
公开(公告)日：2023-10-26
申请号：US18217667
申请日：2023-07-03
Applicant: BWXT Advanced Technologies LLC
Inventor： John R. SALASIN , Benjamin D. FISHER
IPC: B29C64/165 , G21C3/50 , C08K3/22 , C08K3/08 , C08F2/46 , B33Y10/00 , B33Y70/10 , B33Y80/00 , C08F2/08 , C08F22/10
CPC classification number: B29C64/165 , G21C3/50 , C08K3/22 , C08K3/08 , C08F2/46 , B33Y10/00 , B33Y70/10 , B33Y80/00 , C08F2/08 , C08F22/1006 , C08K2003/0856 , C08K2201/003
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.
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公开(公告)号：US20230282373A1
公开(公告)日：2023-09-07
申请号：US18118193
申请日：2023-03-07
Applicant: BWXT Advanced Technologies LLC
Inventor： Benjamin D. FISHER , John R. SALASIN
Abstract: Fuel bundle has plurality of twisted ribbon fuel rodlets arranged in 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.
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公开(公告)号：US20230282380A1
公开(公告)日：2023-09-07
申请号：US18118200
申请日：2023-03-07
Applicant: BWXT Advanced Technologies LLC
Inventor： Benjamin D. FISHER , John R. SALASIN , David J. GARNER , Christopher N. FOLMAR , Sabrina McCOY
CPC classification number: G21C21/10 , G21C3/623 , G21C3/334 , B21C23/002 , B21C23/08
Abstract: 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.
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公开(公告)号：US20200308064A1
公开(公告)日：2020-10-01
申请号：US16835398
申请日：2020-03-31
Applicant: BWXT Advanced Technologies LLC
Inventor： Benjamin D. FISHER , John R. SALASIN
IPC: C04B35/589 , C04B35/58 , C04B35/56 , C04B35/634 , C04B35/638 , C04B35/64 , B33Y70/10 , G21C21/02
Abstract: Pre-ceramic particle solutions can prepared by a Coordinated-PDC process, a Direct-PDC process or a Coordinated-Direct-PDC process. The pre-ceramic particle solution includes a polymer selected from the group consisting of (i) an organic polymer including a metal or metalloid cation, (ii) a first organometallic polymer and (iii) a second organometallic polymer including a metal or metalloid cation different from a metal in the second organometallic polymer, a plurality of particles selected from the group consisting of (a) a ceramic fuel particle and (b) a moderator particle, a dispersant, and a polymerization initiator. The pre-ceramic particle solution can be supplied to an additive manufacturing process, such as digital light projection, and made into a structure (which is pre-ceramic particle green body) that can then be debinded to form a polymer-derived ceramic sintered body. In some embodiments, the polymer-derived ceramic sintered body is a component or structure for fission reactors.
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7.发明公开
公开(公告)号：US20240308136A1
公开(公告)日：2024-09-19
申请号：US18641495
申请日：2024-04-22
Applicant: BWXT Advanced Technologies LLC
Inventor： Benjamin D. FISHER , John R. SALASIN , Bryan Blake WIGGINS
IPC: B29C64/165 , B33Y10/00 , B33Y70/10 , B33Y80/00 , C08F2/08 , C08F2/54 , C08F20/14 , C08F22/10 , C08K3/08 , C08K3/10 , C08K3/14 , C08K3/16 , C08K3/22 , C08K5/00 , C08K5/101 , C08K5/19 , C08K5/3492 , C08K5/5397 , G21C3/04 , G21C3/50 , G21C21/00
CPC classification number: B29C64/165 , B33Y10/00 , B33Y70/10 , B33Y80/00 , C08F2/08 , C08F2/54 , C08F20/14 , C08F22/1006 , C08K3/08 , C08K3/10 , C08K3/14 , C08K3/16 , C08K3/22 , C08K5/0041 , C08K5/101 , C08K5/19 , C08K5/3492 , C08K5/5397 , G21C3/04 , G21C3/50 , G21C21/00 , C08K2003/0887 , C08K2003/221 , C08K2201/005 , C08K2201/006
Abstract: Additive manufacturing methods use a surrogate slurry to iteratively develop an additive manufacturing protocol and then substitutes a final slurry composition to then additively manufacture a final component using the developed additive manufacturing protocol. In the nuclear reactor component context, the final slurry composition is a nuclear fuel slurry having a composition: 30-45 vol. % monomer resin, 30-70 vol. % plurality of particles of uranium-containing material, >0-7 vol. % dispersant, photoactivated dye, photoabsorber, photoinitiator, and 0-18 vol. % (as a balance) diluent. The surrogate slurry has a similar composition, but a plurality of surrogate particles selected to represent a uranium-containing material are substituted for the particles of uranium-containing material. The method provides a means for in-situ monitoring of characteristics of the final component during manufacture as well as in-situ volumetric inspection. Compositions of surrogate slurries and nuclear fuel slurries are also disclosed.
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公开(公告)号：US20240038406A1
公开(公告)日：2024-02-01
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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公开(公告)号：US20240021327A1
公开(公告)日：2024-01-18
申请号：US18220335
申请日：2023-07-11
Applicant: BWXT Advanced Technologies LLC
Inventor： Benjamin D. FISHER , Craig D. GRAMLICH , Ross E. PIVOVAR , John R. SALASIN , Jonathan K. WITTER
CPC classification number: G21C3/08 , G21C15/06 , F28D15/046
Abstract: A heat pipe fuel element includes an evaporation section, a condensing section, a capillary section connecting the evaporation section to the condensing section, and a primary coolant. In a cross-section in a plane perpendicular to a longitudinal axis of the evaporation section, the heat pipe fuel element includes a cladding layer enclosing an interior area including a fuel body formed of a fissionable fuel composition and that has an outer surface oriented toward the cladding layer and an inner surface defining a periphery of a vaporization space of the evaporation section. The fuel body has a structure with a shape corresponding to a mathematically-based periodic solid, such as a triply periodic minimal surface (TPMS), and the evaporation sections of a plurality of heat pipe fuel elements are arranged in a phyllotaxis pattern (as seen in a cross-section in a plane perpendicular to a longitudinal axis of the active core region).
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公开(公告)号：US20220351870A1
公开(公告)日：2022-11-03
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
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.
