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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：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
公开(公告)号：US11993009B2
公开(公告)日：2024-05-28
申请号：US16835370
申请日：2020-03-31
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：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：US12070900B2
公开(公告)日：2024-08-27
申请号：US18217667
申请日：2023-07-03
Applicant: BWXT Advanced Technologies LLC
Inventor： John R. Salasin , Benjamin D. Fisher
IPC: B29C64/00 , B29C64/165 , B33Y10/00 , B33Y70/10 , B33Y80/00 , C08F2/08 , C08F2/46 , C08F22/10 , C08K3/08 , C08K3/22 , G21C3/50
CPC classification number: B29C64/165 , B33Y10/00 , B33Y70/10 , B33Y80/00 , C08F2/08 , C08F2/46 , C08F22/1006 , C08K3/08 , C08K3/22 , G21C3/50 , 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：US11731350B2
公开(公告)日：2023-08-22
申请号：US17515625
申请日：2021-11-01
Applicant: BWXT Advanced Technologies LLC
Inventor： John R. Salasin , Benjamin D. Fisher
IPC: B29C64/00 , 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 , B33Y10/00 , B33Y70/10 , B33Y80/00 , C08F2/08 , C08F2/46 , C08F22/1006 , C08K3/08 , C08K3/22 , G21C3/50 , 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：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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