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公开(公告)号：US20240343597A1
公开(公告)日：2024-10-17
申请号：US18753220
申请日：2024-06-25
申请人： TerraPower, LLC
发明人： Brian C. KELLEHER
摘要： This document describes a method for reducing the corrosivity of certain magnesium salts. The salt product resulting from the method exhibits reduced corrosion of steels that come into contact with the salt relative to salt compositions that are not so treated. This makes such treated salts more efficient coolant salts as they will require less equipment replacement over time. The method uses magnesium metal to reduce unwanted impurities in the salts the reduced impurities are then removed as either gas or precipitate from the now purified salt. Without being bound to one particular theory, it is believed that the reduction of the level of impurities in the salt results in a salt with substantially reduced corrosiveness to steel.
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公开(公告)号：US20240312655A1
公开(公告)日：2024-09-19
申请号：US18361781
申请日：2023-07-28
申请人： TerraPower, LLC
发明人： Daniel R. Althouse , Nikolas Clark , Jeffrey Derenthal , Thomas Ekstrom , Victoria Graham , Joseph Heath , Matthew M. Mareka , Bryan W. Sardo , Nathan Smith , Zachariah Snyder , Olivera Ulicevic
CPC分类号： G21C19/26 , B25J9/102 , B25J13/085 , B25J15/0004 , B25J15/0047 , G21C19/105 , G21C19/16 , G21C19/18
摘要： An in-vessel fuel transfer machine may be permanently affixed to a nuclear reactor and remain in place during power operations. The in-vessel fuel transfer machine may include a pantograph machine that positions a grapple in order to access any fuel socket location within the core and move any of the core assemblies between the core, an in-vessel fuel storage area, and a fuel elevator. The grapple may be positioned through a combination of movements, such as, rotating a rotating plug assembly, rotating the in-vessel fuel transfer machine, extending the pantograph arms, and shuttling the grapple along a leg. The grapple may be compliant to accommodate deformed core assemblies and may be configured to pivot to more closely align to an eccentric core assembly handling socket or be moveable in a horizontal plane to accommodate a deformed core assembly during insertion or withdrawal.
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公开(公告)号：US20240309665A1
公开(公告)日：2024-09-19
申请号：US18359606
申请日：2023-07-26
申请人： TerraPower, LLC
发明人： Derek Bass , Michael F. Dimitri , Brian C. Johnson , Calen Kaneko , Christopher A. Martin , Sean T Mosier , Philip M. Schloss , Nathan Smith , Mark R. Werner
IPC分类号： E04H5/02 , E04B1/16 , G21C3/16 , G21C3/322 , G21C3/328 , G21C3/34 , G21C13/028 , G21C13/093 , G21C13/10 , G21C15/18 , G21C21/02
CPC分类号： E04H5/02 , E04B1/167 , G21C3/16 , G21C3/322 , G21C3/328 , G21C3/3432 , G21C13/028 , G21C13/093 , G21C13/10 , G21C15/18 , G21C21/02
摘要： A nuclear reactor is constructed in sub-modules and super modules which are manufactured, packaged, and shipped to a construction site. At least some of the modules are packaged in suitable shielding containers or portions of containers, which may be steel. The modules are assembled on-site, and some of the modules remain within their respective shipping containers after assembly. One or more of the shipping containers may be used as concrete forms to support the pouring of concrete in between selected modules. The concrete may be used for structural support, shielding, or both.
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公开(公告)号：US12073951B2
公开(公告)日：2024-08-27
申请号：US18124159
申请日：2023-03-21
申请人： TerraPower, LLC
发明人： Christopher M. Regan , Jacob Wilcox
IPC分类号： G21C17/028 , B01B1/00 , B01J8/02 , B05C11/11 , C23C14/14 , C23C14/24 , F27B14/10 , B01D1/06 , G01N27/626
CPC分类号： G21C17/028 , B01B1/005 , B01J8/0285 , B05C11/11 , C23C14/14 , C23C14/243 , F27B14/10 , B01D1/06 , G01N27/626 , Y10S261/65
摘要： A vaporizer includes an outer tube configured to receive a flow of heated gas and an inner tube disposed at least partially within the outer tube. The inner tube is spaced apart from the outer tube such that the flow of heated gas is channeled through an annular space therebetween. The vaporizer also includes a crucible disposed at least partially within the inner tube. The crucible is extendable and retractable relative to the inner tube and within the outer tube. The crucible is configured to hold a molten metal such that a surface area of the molten metal exposed to the flow of heated gas is adjustable based on the position of the crucible relative to the inner tube. A heater is configured to vaporize the molten material and the vapor mixes with the flow of heated gas.
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5.发明公开公开(公告)号：US20240282473A1
公开(公告)日：2024-08-22
申请号：US18393377
申请日：2023-12-21
申请人： TerraPower, LLC
IPC分类号： G21C17/022 , G21C17/00
CPC分类号： G21C17/022 , G21C17/002
摘要： A failed fuel pin emits cesium into the primary sodium coolant and xenon into the cover gas in a reactor vessel. A pipe containing radioactive liquid sodium accepts flowing primary sodium from the reactor vessel. A radiation detector is positioned adjacent the pipe such that gamma radiation emitted from the pipe can be measured. The pipe may be isolated to increase detection limits by allowing short-lived isotopes to decay. The isotopic ratio of 137Cs/134Cs can be measured, which can be used to determine the burnup of a fuel assembly from within the core, and therefore, the failed fuel assembly can be identified based at least in part on the burnup. Further, mass spectrometry may be used to measure the ratio of a stable and unstable xenon isotope. The identification techniques may be used in conjunction to quickly identify a failed fuel assembly in-situ and during reactor operation.
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公开(公告)号：US12046380B2
公开(公告)日：2024-07-23
申请号：US17151012
申请日：2021-01-15
申请人： TerraPower, LLC
摘要： A fast neutron nuclear reactor contains a nuclear reactor core having an array of device locations. Some device locations in the nuclear reactor core contain fissile and fertile nuclear fuel assembly devices. One or more other device locations in the nuclear reactor core contain Doppler reactivity augmentation devices that amplify the negativity of the Doppler reactivity coefficient within the nuclear reactor core. In some implementations, a Doppler reactivity augmentation device can also reduce the coolant temperature coefficient within the nuclear reactor core. Accordingly, a Doppler reactivity augmentation device contributes to a more stable nuclear reactor core.
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公开(公告)号：US11946702B2
公开(公告)日：2024-04-02
申请号：US17210384
申请日：2021-03-23
申请人： TerraPower, LLC
发明人： Joon Hyung Choi , Daniel Eichel , Mei He , Pavel Hejzlar , Mathieu G. Martin , Samuel J. Miller , James M. Vollmer
CPC分类号： F28F13/003 , F28D2021/0054
摘要： A nuclear reactor includes a heat exchanger that transfers thermal energy from a primary reactor coolant to a secondary coolant. The heat exchanger is formed with a hot flow channel, a cold flow channel, and a porous layer between the hot flow channel and the cold flow channel. The porous layer may be thermally insulative to reduce the efficiency of thermal energy transfer from the hot flow channel to the cold flow channel. The porous layer may have a control gas passed therethrough that can be tailored to control the thermal energy transfer through the porous layer. The control gas can be tested for leakage within the heat exchanger. The control gas may also be used to sequester fission or activation products.
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公开(公告)号：US11881320B2
公开(公告)日：2024-01-23
申请号：US17130123
申请日：2020-12-22
申请人： TerraPower, LLC
发明人： Kent E. Wardle
摘要： A molten fuel reactor includes a reactor core having substantially a right-circular cylinder shape with a longitudinal axis. At least one inlet is configured to channel fuel salt into the reactor core. At least one outlet is configured to channel fuel salt out of the reactor core, and the inlet and outlet at least partially define a flow loop of fuel salt with respect to the reactor core. An orifice ring plate is disposed within the reactor core and proximate the at least one inlet. The orifice ring plate is configured to condition a flow of fuel salt entering the reactor core from the at least one inlet. The orifice ring plate extends circumferentially about the longitudinal axis and has a height defined in a direction along the longitudinal axis. The orifice ring plate includes a plurality of apertures configured to allow the flow of fuel salt therethrough.
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公开(公告)号：US20230395269A1
公开(公告)日：2023-12-07
申请号：US18453317
申请日：2023-08-22
申请人： TerraPower, LLC
CPC分类号： G21C3/04 , G21C1/026 , G21C21/08 , G21C3/16 , G21C7/005 , G21D3/001 , G21C3/045 , G21C3/047 , G21C3/42
摘要： A fuel element has a ratio of area of fissionable nuclear fuel in a cross-section of the tubular fuel element perpendicular to the longitudinal axis to total area of the interior volume in the cross-section of the tubular fuel element that varies with position along the longitudinal axis. The ratio can vary with position along the longitudinal axis between a minimum of 0.30 and a maximum of 1.0. Increasing the ratio above and below the peak burn-up location associated with conventional systems reduces the peak burn-up and flattens and shifts the burn-up distribution, which is preferably Gaussian. The longitudinal variation can be implemented in fuel assemblies using fuel bodies, such as pellets, rods or annuli, or fuel in the form of metal sponge and meaningfully increases efficiency of fuel utilization.
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公开(公告)号：US20230383189A1
公开(公告)日：2023-11-30
申请号：US18446298
申请日：2023-08-08
申请人： TerraPower, LLC
摘要： Embodiments of methods for improving mesophase pitch for carbon fiber production using supercritical carbon dioxide are described. The methods improve the relative amount and quality of mesophase pitch in feedstocks, such as coal tar, already having at least some mesophase pitch. One particular method includes performing a sCO2/toluene extraction on the coal tar to obtain a toluene insoluble fraction of the coal tar; mixing the toluene insoluble fraction with sCO2 to obtain a sCO2/toluene insoluble fraction mixture; and extruding the sCO2/toluene insoluble fraction mixture, thereby separating the sCO2 from the toluene insoluble fraction to obtain fibers of mesophase pitch.
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