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公开(公告)号：US20240153652A1
公开(公告)日：2024-05-09
申请号：US18507246
申请日：2023-11-13
发明人： Koji FUJIMURA , Kazuhiro Fujimata , Suo Fuchita , Junichi Miwa
摘要： A core of a fast reactor including a sodium plenum installed above a core fuel, which is capable of reliably reducing a void reactivity, and an operation method thereof are provided. The core of a fast reactor including the sodium plenum installed above the core fuel is characterized in that a tip of a primary control rod is inserted into a core fuel region, and a tip of a backup control rod is arranged above an upper end of the core fuel region for operation.
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公开(公告)号：US11081241B2
公开(公告)日：2021-08-03
申请号：US16529425
申请日：2019-08-01
申请人： X-ENERGY, LLC
IPC分类号： G21C3/28 , G21C3/62 , G21C21/02 , B29C64/165 , G21C21/14 , B33Y80/00 , G21C1/07 , G21C3/58 , G21C3/42 , B33Y10/00
摘要： Nuclear fuel elements may include: a fuel zone including fuel particles disposed in parallel layers in a matrix including graphite powder; and a shell comprising graphite and surrounding the fuel zone. The fuel particles may include fissile particles, burnable poison particles, breeder particles, or a combination thereof. The fuel zone may include a central region and a peripheral region surrounding the central region, and a fuel particle density of the peripheral region may be greater than a fuel particle density of the central region.
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公开(公告)号：US10902956B2
公开(公告)日：2021-01-26
申请号：US16724447
申请日：2019-12-23
申请人： X-Energy, LLC
发明人： Martin van Staden , Peter Pappano
摘要： A method of manufacturing nuclear fuel elements may include: forming a base portion of the fuel element by depositing a powdered matrix material including a mixture of a graphite material and a fibrous material; depositing particles on the base portion in a predetermined pattern to form a first particle layer, by controlling the position of each particle in the first particle layer; depositing the matrix material on the first particle layer to form a first matrix layer; depositing particles on the first matrix layer in a predetermined pattern to form a second particle layer by controlling positions of each particle in the second particle layer; depositing the matrix material on the second particle layer to form a second matrix layer; and forming a cap portion of the fuel pebble by depositing the matrix material. The particles in the first particle layer and the second particle layer include nuclear fuel particles.
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公开(公告)号：US20180268948A1
公开(公告)日：2018-09-20
申请号：US15921891
申请日：2018-03-15
发明人： Rei KIMURA , Satoshi Wada , Haruka Kajiwara , Ryosuke Miura
CPC分类号： G21C3/326 , G21C3/00 , G21C3/07 , G21C3/28 , G21C5/02 , G21C5/12 , G21C7/04 , G21C11/06 , Y02E30/39
摘要： A thermal-neutron reactor core includes: a solid moderator expanding to a lengthwise direction; a fuel in the moderator, parallel to the lengthwise direction of the moderator, the fuel containing a fissile material; a cooling tube parallel to the lengthwise direction of the moderator; and a plurality of kinds of burnable poison included in the fuel. The may contain a metal hydride. Furthermore, the plurality of kinds of burnable poison may include one burnable poison containing a concentration of one particular isotope of that one burnable poison.
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5.发明申请公开(公告)号：US20150348654A1
公开(公告)日：2015-12-03
申请号：US14615396
申请日：2015-02-05
CPC分类号： G21C15/06 , G21C3/048 , G21C3/07 , G21C3/32 , G21C3/322 , G21C5/123 , G21C7/08 , G21C15/28 , Y02E30/39
摘要： An organically cooled nuclear reactor comprises fissionable fuel pellets and a neutron-moderator matrix in which the fissionable fuel pellets are distributed. The neutron-moderator matrix also defines coolant channels for flow of an organic coolant.
摘要翻译： 有机冷却的核反应堆包括可裂变燃料颗粒和其中分布有可裂变燃料颗粒的中子 - 调节剂基质。 中子调节剂基质还限定了用于有机冷却剂流动的冷却剂通道。
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6.发明授权Methods and apparatus for suppressing tritium permeation during tritium production 有权在氚生产过程中抑制氚渗透的方法和装置公开(公告)号：US09202601B2
公开(公告)日：2015-12-01
申请号：US13473450
申请日：2012-05-16
CPC分类号： G21G1/02 , G21C3/28 , G21G1/06 , G21G2001/0094
摘要： A tritium production element for use in a conventional power reactor, and methods of use and making, are provided, wherein the element experiences reduced tritium permeation during irradiation by incorporating a silicon carbide barrier that encapsulates one or more burnable absorber pellets. The tritium production element includes a tubular cladding that encloses a plurality of burnable absorber pellets, such that individual pellets or groups of pellets are disposed within a silicon carbide barrier layer.
摘要翻译： 提供了用于常规动力反应器的氚生产元件，以及使用和制造方法，其中通过结合封装一个或多个可燃性吸收剂粒料的碳化硅阻挡层，元件在照射期间经历减小的氚渗透。 氚生产元件包括管状包层，其包围多个可燃的吸收剂粒料，使得单个丸粒或丸粒组设置在碳化硅阻挡层内。
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公开(公告)号：US5499276A
公开(公告)日：1996-03-12
申请号：US313815
申请日：1994-09-28
申请人： Toshio Wakabayashi
发明人： Toshio Wakabayashi
摘要： Neptunium of minor actinide nuclides separated from spent fuel is added to fuel of reactor cores (inner reactor cores and/or outer reactor cores) of a fast reactor and americium of the separated minor actinide nuclides and rare earth elements are added to either or both of radial and axial blankets of the fast reactor for burning. Thus, the minor actinide nuclides with long half-lives can be burnt with the fast reactor core with the minimized effects of the rare earth elements. For a burner reactor, americium and rare earth elements may be added to shields for burning. Curium may be added together with americium and rare earth elements. Neptunium is added in amount of 2% to 5% by weight based on the weight of the fuel and the rare earth elements are added in an amount of 50% by weight or less based on the weight of the fuel. A Purex process is used to separate neptunium and a Truex process is used to separate americium and curium.
摘要翻译： 将与乏燃料分离的少量锕系元素的核子添加到快速反应器的反应堆核心（内部反应堆核心和/或外部反应堆核心）的燃料中，并将分离的次要锕系元素和稀土元素的are加入到 用于燃烧的快堆的径向和轴向毯。 因此，具有长半衰期的次要锕系核素可以通过稀土元素的最小化效应与快堆反应堆燃烧。 对于燃烧器反应器，可以将ium和稀土元素加入到燃烧器的罩中。 ium可以与ium和稀土元素一起加入。 基于燃料的重量，ium is的添加量为2重量％至5重量％，稀土元素的添加量相对于燃料的重量为50重量％以下。 使用Purex过程分离ium ium，而Truex过程用于分离ium和。。
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8.发明授权
公开(公告)号：US5301218A
公开(公告)日：1994-04-05
申请号：US964995
申请日：1992-10-22
摘要： A multi-layer, rolled metal foil is laser tackwelded to form a tube which can be inserted in the intermediate space between the fuel body and cladding of a metal alloy fissionable fuel element. The rolled foil has at least three foil layers at the point of tack welding. The laser welding penetration is adjusted so that the foil weld is maintained at a thickness of at least two foil layers, but does not penetrate all of the layers. The weld is designed to fail in response to fuel or blanket alloy swelling during irradiation. After weld failure, the overlapping layers slip and the multi-layer foil unrolls as the fuel swells, providing a continuous, unbroken barrier between the fuel or blanket alloy and cladding which masks defects in the barrier due to weld failure.
摘要翻译： 多层轧制金属箔被激光焊接以形成可以插入在金属合金可裂变燃料元件的燃料体和包层之间的中间空间中的管。 轧制箔在定位焊接处具有至少三个箔层。 调整激光焊接穿透度，使得箔焊接保持在至少两层箔层的厚度，但不渗透所有层。 焊缝设计成在照射期间不能响应燃料或橡皮布合金膨胀。 在焊接失效之后，重叠的层滑动，并且多层箔随着燃料膨胀而展开，从而在燃料或覆盖合金和包层之间提供连续的，不间断的阻挡层，其掩盖由于焊接故障导致的阻挡层中的缺陷。
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公开(公告)号：US5209898A
公开(公告)日：1993-05-11
申请号：US448926
申请日：1989-12-12
申请人： Heinz-Peter Holley , Rolf Holzer , Guenther Lill , Alfred Neufert , Wolfgang Schricker , Peter Suchy
发明人： Heinz-Peter Holley , Rolf Holzer , Guenther Lill , Alfred Neufert , Wolfgang Schricker , Peter Suchy
CPC分类号： G21C3/328 , G21Y2002/201 , G21Y2004/30 , Y02E30/32 , Y02E30/38
摘要： A fuel assembly of a pressurized water nuclear reactor includes at least two fuel rods, respectively, having a cladding tube of given outer and inner diameters and pellets of given outer diameter received in the cladding tube, the fuel rods being disposed in the fuel assembly at a given mutual spacing of center points thereof, a ratio of the given mutual spacing of the center points of the fuel rods to the outer diameter of the cladding tube being in a range between 1.35 and 1.37.
摘要翻译： 加压水核反应堆的燃料组件分别包括至少两个燃料棒，其具有给定的外径和内径的包层管和给定外径的颗粒容纳在包壳管中，燃料棒设置在燃料组件中 其中心点的给定的相互间隔，燃料棒的中心点给定的相互间隔与包层管的外径的比率在1.35和1.37之间的范围内。
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公开(公告)号：US5089219A
公开(公告)日：1992-02-18
申请号：US643301
申请日：1991-01-22
申请人： John D. Malloy, III
发明人： John D. Malloy, III
摘要： A gas cooled nuclear fuel element. A cylindrical tube having an open lower end contains nuclear fuel disks stacked one upon the other to define an annular space between the tube and disks. An upper and a lower end fitting in the tube support the stack of fuel disks. Each disk has an axial bore or channel for coolant flow. The disks may also be provided with grooves extending radially on the upper or lower face from the axial channel to the outer edge of each disk. The lower end fitting has a central bore that is coaxial with the axial channel in the disks. Coolant flows into the annular space, radially between disks, and then axially out the disks and lower end fitting.
摘要翻译： 一种气体冷却的核燃料元件。 具有开口下端的圆柱形管包含彼此堆叠的核燃料盘，以在管和盘之间限定环形空间。 管中的上端和下端配件支撑燃料盘叠。 每个盘具有用于冷却剂流动的轴向孔或通道。 盘也可以设置有从轴向通道到每个盘的外边缘的上表面或下表面径向延伸的凹槽。 下端配件具有与盘中的轴向通道同轴的中心孔。 冷却剂在圆盘之间径向流入环形空间，然后轴向地流出盘和下端配件。
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