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公开(公告)号：US20230118687A1
公开(公告)日：2023-04-20
申请号：US17906062
申请日：2021-03-09
申请人： OKLO, INC.
发明人： Jacob DeWitte , Joshua G. Richard , Ethan Bates , Samuel Doane , Olorunsola Akinsulire , David Hawn , Patrick Everett
摘要： Radiation shielding and methods of manufacture are disclosed. A radiation shielding apparatus includes a matrix including matrix material; and a mixture positioned in the matrix, the mixture including: a neutron thermalizing material; and a neutron absorbing material mixed with the neutron thermalizing material. A reactivity control system includes a container rotatable around an axis; a divider positioned inside the container to define two or more compartments within the container; at least one neutron absorber positioned in at least one of the two or more compartments; and at least one neutron reflector positioned in another of the two or more compartments that is fluidly isolated from the at least one of the two or more compartments. A method of manufacturing radiation shielding material includes: fabricating a matrix; generating a mixture by mixing a neutron absorbing material, a neutron thermalizing material, and additive materials; and loading the mixture into the matrix.
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公开(公告)号：US20240355491A1
公开(公告)日：2024-10-24
申请号：US18756832
申请日：2024-06-27
申请人： Oklo Inc.
发明人： Jacob DeWitte , Patrick Everett
摘要： A nuclear reactor power system includes: a reactor core comprising a plurality of nuclear fuel elements, each nuclear fuel element comprising: a first cooling channel passing through the nuclear fuel element; and a second cooling channel passing through the nuclear fuel element and fluidly isolated from the first cooling channel; a first cooling system configured to transport a first fluid coolant through the reactor core, the first cooling system fluidly connected to the first cooling channel of each nuclear fuel element; and a second cooling system configured to transport a second fluid coolant through the reactor core, the second cooling system fluidly connected to the second cooling channel of each nuclear fuel element. A direction of first fluid coolant flow through the first cooling channel is the same as a direction of second fluid coolant flow through the second cooling channel.
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公开(公告)号：US10692611B2
公开(公告)日：2020-06-23
申请号：US15444265
申请日：2017-02-27
申请人： Oklo Inc.
发明人： Jacob DeWitte , Joshua G. Richard
摘要： System and methods are disclosed for controlling a nuclear reactor that uses fuel having plutonium-239. The nuclear reactor includes a neutron moderator, such as ZrH1.6, which behaves as an Einstein oscillator and increases the energy of thermal neutrons into the Pu-239 neutron absorption resonance as the temperature of the nuclear reactor increases. A neutron absorbing element with neutron absorption around 0.3 eV is added to the nuclear reactor to suppress any reactivity gain that can occur due to the increase in temperature. The amount of the neutron absorbing element to be added to the nuclear reactor is calculated such that the reactivity gain that may occur at any time during the life of the fuel is suppressed.
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公开(公告)号：US11735326B2
公开(公告)日：2023-08-22
申请号：US17601886
申请日：2021-03-08
申请人： OKLO INC.
发明人： Jacob DeWitte , Caroline Cochran , Patrick Everett , John Hanson , Joshua G. Richard , Alex Renner , Nathan Graff , David Hawn
IPC分类号： G21C15/257 , G21C3/20 , G21C1/32 , G21C3/38
CPC分类号： G21C15/257 , G21C1/326 , G21C3/20 , G21C1/322 , G21C3/38
摘要： Fuel, heat exchangers, and instrumentation for nuclear reactors are disclosed. A nuclear power system includes a plurality of nuclear fuel elements, each of the nuclear fuel elements including an annulus; and a plurality of heat pipes, each of the plurality of heat pipes configured to pass through the annulus of a respective one of the nuclear fuel elements in conductive thermal contact with the respective nuclear fuel element. A nuclear instrumentation module includes an assembly of optical fibers, each optical fiber comprising one or more sensors and configured for removable installation at one of the plurality of heat pipes. A heat exchanger includes a heat pipe including an evaporating region and a condensing region; and a tube bundle configured to wrap around the condensing region of the heat pipe and including one or more adjacent, parallel tubes, each tube forming a helix that is coaxial to the heat pipe.
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公开(公告)号：US20230154634A1
公开(公告)日：2023-05-18
申请号：US17601886
申请日：2021-03-08
申请人： OKLO INC.
发明人： Jacob DeWitte , Caroline Cochran , Patrick Everett , John Hanson , Joshua G. Richard , Alex Renner , Nathan Graff , David Hawn
IPC分类号： G21C15/257 , G21C1/32
CPC分类号： G21C15/257 , G21C1/322
摘要： Fuel, heat exchangers, and instrumentation for nuclear reactors are disclosed. A nuclear power system includes a plurality of nuclear fuel elements, each of the nuclear fuel elements including an annulus; and a plurality of heat pipes, each of the plurality of heat pipes configured to pass through the annulus of a respective one of the nuclear fuel elements in conductive thermal contact with the respective nuclear fuel element. A nuclear instrumentation module includes an assembly of optical fibers, each optical fiber comprising one or more sensors and configured for removable installation at one of the plurality of heat pipes. A heat exchanger includes a heat pipe including an evaporating region and a condensing region; and a tube bundle configured to wrap around the condensing region of the heat pipe and including one or more adjacent, parallel tubes, each tube forming a helix that is coaxial to the heat pipe.
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公开(公告)号：US20230102811A1
公开(公告)日：2023-03-30
申请号：US17905987
申请日：2021-03-08
申请人： OKLO, INC.
发明人： Jacob DeWitte , Caroline Cochran , Nathan Graff , Patrick Everett , Joshua G. Richard , Alex Renner , David Hawn , John Hanson
IPC分类号： G21C13/10 , G21C11/02 , G21C13/028 , G21C13/093 , G21C15/257 , G21C15/253 , G21C13/024 , G21D1/02
摘要： Reactor buildings and vessel systems are disclosed. A nuclear power system includes: a building structure that comprises at least two exterior side walls and two end walls, at least one of the exterior walls angled non-orthogonally relative to a floor of the building structure, the at least two exterior walls and two end walls defining an interior volume of the building structure; one or more nuclear reactor systems mounted at least partially in the interior volume of the building structure; and one or more heat exchanger systems mounted at least partially to at least one of the exterior walls. A nuclear reactor vessel system includes: a nuclear fission reactor; an inner vessel that defines an inner volume sized to at least partially enclose the nuclear fission reactor; and an outer vessel sized to wholly or substantially enclose the inner vessel, the inner vessel being removable from the outer vessel.
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公开(公告)号：US20240153654A1
公开(公告)日：2024-05-09
申请号：US18550166
申请日：2022-03-14
申请人： Oklo Inc.
发明人： Jacob DeWitte
摘要： A commercial nuclear fuel system includes: a vessel that defines an inner volume; a reactor core positioned within the inner volume; and a plurality of fuel pins disposed in the reactor core, each of the plurality of fuel pins comprising at least one hydride fuel element positioned in a cladding. The at least one hydride fuel element is enriched to twenty percent or less of fissile material. The fissile material comprises one or more of uranium-233, uranium-235, or plutonium-239. The fuel pins are positioned in a lattice within the reactor core. The vessel comprises a first vessel, and a second vessel is positioned within the first vessel and surrounds the plurality of fuel pins. At least one reflector is positioned within the first vessel and surrounds the plurality of fuel pins. A shielding assembly is positioned between the reflector and the first vessel.
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公开(公告)号：US20240145105A1
公开(公告)日：2024-05-02
申请号：US18547829
申请日：2022-02-25
申请人： Oklo Inc.
发明人： Jacob DeWitte
摘要： A nuclear fuel system (210), nuclear fuel particle (100), and method for operating a nuclear fuel system are disclosed. A nuclear fuel system includes a matrix (130) material and a plurality of fuel particles (100) disposed in the matrix material, each fuel particle comprising a fuel kernel (110) and a fuel coating (120) that covers a surface of the fuel kernel. The fuel kernel comprises a fissile material including one or more of uranium-233, uranium-235, or plutonium-239. The fuel coating is functionally graded in density. A density of the fuel coating increases along an outward radial direction referenced to the center of the fuel kernel. The fuel coating comprises a neutron moderating material. A volume fraction of fuel particles is thirty-five percent or more of a volume of a nuclear fuel compact.
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9.发明公开公开(公告)号：US20230402197A1
公开(公告)日：2023-12-14
申请号：US18022458
申请日：2021-08-19
申请人： Oklo Inc.
发明人： Jacob DeWitte , Caroline Cochran , Alexandra Renner , Patrick Everett , Miller Geschke , Clyde Huibregtse , David Hawn , John Hanson
IPC分类号： G21C15/247 , G21C15/26 , G21C7/18 , G21C7/28
CPC分类号： G21C15/247 , G21C15/26 , G21C7/18 , G21C7/28
摘要： Methods and systems for in-vessel natural circulation alkali metal reactor systems, purification systems, and associated methods are disclosed. A nuclear reactor vessel system includes an inner vessel that defines an inner volume sized to at least partially enclose a reactor. The reactor includes a plurality of nuclear fuel elements at least partially enclosed within a cladding, the reactor being cooled by a liquid metal coolant in a primary coolant loop. A pool of immersing fluid occupies a volume inside the inner vessel. The reactor vessel system includes an outer vessel sized to wholly or substantially enclose the inner vessel. A nuclear reactor power system includes a reactor core including an active fuel region; and a rotatable drum including at least one of a neutron absorbing material, a neutron leakage enhancing material, or a neutron reflecting material, the rotatable drum positioned external to the active fuel region of the reactor core.
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公开(公告)号：US20170249999A1
公开(公告)日：2017-08-31
申请号：US15444265
申请日：2017-02-27
申请人： Oklo Inc.
发明人： Jacob DeWitte , Joshua G. Richard
摘要： A nuclear reactor may comprise: fuel comprising or breeding plutonium-239; a neutron moderator, such as ZrHx, where x is about 1.6, YH2, TiH2 and/or ThH2, which behaves as an Einstein oscillator and as the temperature of the reactor increases the moderator increases the energy of thermal neutrons into the Pu-239 neutron absorption resonance; and a neutron absorbing element with strong neutron absorption around 0.3 eV added to one or more components of a reactor core of the nuclear reactor, wherein the neutron absorbing element is provided in an amount calculated to suppress, at any time during the life of the fuel, a reactivity gain with temperature due to the neutron moderator increasing the energy of thermal neutrons into the Pu-239 neutron absorption resonance.
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