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公开(公告)号：US20240021328A1
公开(公告)日：2024-01-18
申请号：US18195112
申请日：2023-05-09
Applicant: CLEAN CORE THORIUM ENERGY LLC
Inventor： Mehul SHAH , Rida MILANY , Koroush SHIRVAN
Abstract: Thorium-based fuel bundles are used in existing PHWR reactors (e.g., Indian 220 MWe PHWR, Indian 540 MWe PHWR, Indian 700 MWe PHWR, CANDU 300/600/900) in place of conventional uranium-based fuel bundles, with little or no modifications to the reactor. The fuel composition of such bundles is 60+ wt % thorium, with the balance of fuel provided by low-enriched uranium (LEU), which has been enriched to 13-19.95% 235U. According to various embodiments, the use of such thorium-based fuel bundles provides (1) 100% of the nominal power over the entire life cycle of the core, (2) high burnup, and (3) non-proliferative spent fuel bundles having a total isotopic uranium concentration of less than 12 wt %. Reprocessing of spent fuel bundles is also avoided.
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2.发明申请公开(公告)号：US20180254114A1
公开(公告)日：2018-09-06
申请号：US15450167
申请日：2017-03-06
Applicant: WESTINGHOUSE ELECTRIC COMPANY, LLC
Inventor： EDWARD J. LAHODA , ANDREW J. MUELLER
CPC classification number: G21C21/02 , G21C3/042 , G21C3/045 , G21C3/047 , G21C3/10 , G21C3/20 , Y02E30/40
Abstract: A method is described that includes the steps of making a thin walled Zr alloy tube, loading nuclear fuel pellets into the tube, compressing the tube onto the fuel pellets to substantially reduce free space around the fuel pellets, positioning end plugs at each of two ends of the tube, filling the tube with a heat transferring gas, and coating the compressed tube with a corrosion resistant material using a thermal deposition process, such as cold spray, before inserting the tube into a pre-formed SiC composite cover having at least one closed end.
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公开(公告)号：US20170062080A1
公开(公告)日：2017-03-02
申请号：US15245594
申请日：2016-08-24
Applicant: TerraPower, LLC
Inventor： Jesse R. Cheatham, III , Ryan N. Latta , Samuel J. Miller
CPC classification number: G21C3/04 , G21C1/026 , G21C3/045 , G21C3/047 , G21C3/16 , G21C3/42 , G21C7/005 , G21C21/08 , G21D3/001 , Y02E30/34 , Y02E30/39
Abstract: 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.
Abstract translation: 燃料元件具有在管状燃料元件的垂直于纵向轴线的横截面中的可裂变核燃料的面积与管状燃料元件的横截面中的内部容积的总面积的比率，其随着沿着 纵轴。 该比率可以随纵轴的位置而变化，最小值为0.30，最大值为1.0。 增加与常规系统相关的峰值燃耗位置之上和之下的比率减少了峰值燃尽和平坦化，并且使燃烧分布发生偏移，燃烧分布优选是高斯分布。 纵向变化可以在使用诸如颗粒，棒或环的燃料体的燃料组件或金属海绵形式的燃料中实现，并且有意义地提高燃料利用效率。
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公开(公告)号：US11990249B2
公开(公告)日：2024-05-21
申请号：US16518890
申请日：2019-07-22
Applicant: TerraPower, LLC
Inventor： Jesse R. Cheatham, III , Ryan N. Latta , Samuel J. Miller
CPC classification number: G21C3/04 , G21C1/026 , G21C3/16 , G21C7/005 , G21C21/08 , G21D3/001 , G21C3/045 , G21C3/047 , G21C3/42 , Y02E30/30
Abstract: 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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5.发明公开公开(公告)号：US20230411024A1
公开(公告)日：2023-12-21
申请号：US17845385
申请日：2022-06-21
Applicant: X-Energy, LLC
Inventor： Brandon Blamer
CPC classification number: G21C3/045 , G21C3/06 , G01N15/14 , G01N2015/1486
Abstract: An optical counter is used in a method and system for producing a nuclear fuel element having a known volume of homogeneously distributed nuclear material. The method includes feeding nuclear fuel particles along a channel having a conveyer configured to transmit the nuclear fuel particles to an exit; driving the conveyer until a target number of nuclear fuel particles exits the channel through the exit; and counting a number of nuclear fuel particles which pass through the exit of the channel with an optical counter. The conveyer is stopped after the target number of nuclear fuel particles exits the channel. The target number of nuclear fuel particles are fed into a mold for shaping the nuclear fuel element, and void space remaining in the mold is filled with a particulate matrix material so as to homogeneously distribute the target number of nuclear fuel particles within the particulate matrix material. The particulate matrix material is then converted into a solid matrix material.
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Patent Agency Ranking
公开(公告)号：US20180090237A1
公开(公告)日：2018-03-29
申请号：US15565164
申请日：2016-04-12
Applicant: Claudio Filippone
Inventor： Claudio Filippone
CPC classification number: G21D5/02 , G21C1/30 , G21C1/32 , G21C3/045 , G21C3/06 , G21C3/16 , G21C3/322 , G21C7/30 , G21C11/02 , G21C15/04 , G21C15/06 , Y02E30/40
Abstract: Various embodiments of a transportable nuclear power generator having a plurality of subcritical power modules are disclosed. Each of the plurality of subcritical power modules includes a fuel cartridge, a power conversion unit, and a housing substantially enclosing the fuel cartridge and the power conversion unit. The fuel cartridge contains a nuclear fuel and has a proximal end and a distal end. The power conversion unit includes a compressor turbine disposed at the proximal end of the fuel cartridge and a power turbine disposed at the distal end of the fuel cartridge. At least one of the plurality of subcritical power modules is movable with respect to the other of the plurality of subcritical power modules between a first position and a second position to control criticality of the nuclear fuel contained in the fuel cartridges of the plurality of subcritical power modules.
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7.发明申请公开(公告)号：US20170249998A1
公开(公告)日：2017-08-31
申请号：US15277270
申请日：2016-09-27
Applicant: KEPCO NUCLEAR FUEL CO., LTD.
Inventor： Min Young CHOI , Kwang Young LIM , Seung Jae LEE , Yeon Soo NA , Tae Sik JUNG , Jae Ik KIM , Yong Kyoon MOK , Yoon Ho KIM , Chung Yong LEE , Hun JANG , Dae Gyun GO , Sung Yong LEE , Jong Sung YOO
Abstract: This invention relates to a composition and method for manufacturing a large-grained uranium oxide nuclear fuel pellet containing an additive. The nuclear fuel pellet is configured such that a uranium oxide powder and an additive powder composed of an Mg compound and a Si compound or Ca compound and a Al compound are mixed together, thus increasing a grain size to thus suppress the release of fission products, thereby increasing the stability of nuclear fuel, preventing cladding tubes from breaking, and contributing to the stable operation of nuclear power plants, ultimately increasing the overall stability of nuclear power plants including nuclear fuel.
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公开(公告)号：US20170221590A1
公开(公告)日：2017-08-03
申请号：US15518920
申请日：2015-10-12
Applicant: THOR ENERGY AS
Inventor： Klara INSULANDER BJÖRK , Øystein ASPHJELL
CPC classification number: G21C3/328 , G21C3/045 , G21C3/16 , G21C3/326 , G21C3/58 , G21C3/623 , G21C7/005 , G21C7/06 , Y02E30/31 , Y02E30/38 , Y02E30/39
Abstract: The present invention concerns a fuel assembly for a nuclear power boiling water reactor. The fuel assembly comprises fuel rods. At least 95% of the fuel rods comprise nuclear fuel material in the form of U enriched in 235U. At least 20% of the fuel rods belong to a first set of fuel rods. The fuel rods in this first set comprise both U enriched in 235U and Th. The first set comprises a first and a second subset of fuel rods. The ratio, with regard to weight, between Th and U, in each fuel rod of said first subset, is higher than the ratio, with regard to weight, between Th and U, in each fuel rod of said second subset. The invention also concerns a nuclear power boiling water reactor and a manner of operating such a reactor.
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公开(公告)号：US12068084B2
公开(公告)日：2024-08-20
申请号：US18140765
申请日：2023-04-28
Applicant: Ultra Safe Nuclear Corporation
Inventor： Lance Lewis Snead
Abstract: The known fully ceramic microencapsulated fuel (FCM) entrains fission products within a primary encapsulation that is the consolidated within a secondary ultra-high-temperature-ceramic of Silicon Carbide (SiC). In this way the potential for fission product release to the environment is significantly limited. In order to extend the performance of this fuel to higher temperature and more aggressive coolant environments, such as the hot-hydrogen of proposed nuclear rockets, a zirconium carbide matrix version of the FCM fuel has been invented. In addition to the novel nature to this very high temperature fuel, the ability to form these fragile TRISO microencapsulations within fully dense ZrC represent a significant achievement.
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公开(公告)号：US20240266079A1
公开(公告)日：2024-08-08
申请号：US18210437
申请日：2023-06-15
Applicant: CLEAN CORE THORIUM ENERGY LLC
Inventor： Mehul SHAH , Rida MILANY , Koroush SHIRVAN
Abstract: Thorium-based fuel bundles according to one or more embodiments of the present invention provide a fresh fuel bundle comprising a first ring of fuel pins and a second ring of fuel pins. Each ring fuel pin has a fuel composition comprising uranium and thorium. The first ring fuel pins differ from the second ring fuel pins in each of the thorium wt %, uranium wt %, and 235U enrichment.
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