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公开(公告)号：US11342086B2
公开(公告)日：2022-05-24
申请号：US16052964
申请日：2018-08-02
摘要： A fuel bundle surrogate for the irradiation of a target material, having a plurality of tube sheaths, each tube sheath being parallel to a longitudinal center axis of the fuel bundle surrogate, a plurality of end caps, a pair of end plates, wherein the end plates are disposed at opposing ends of the plurality of tube sheaths, and a first target comprised of a first target material suitable for producing the isotope by way of a neutron capture event, wherein the first target is disposed in a first tube sheath, and wherein the first tube sheath of the plurality of tube sheaths comprises an elongated thickened wall portion and a pair of annular end portions, each annular end portion being disposed on a corresponding end of the thickened wall portion and having a wall thickness that is less than a wall thickness of the thickened wall portion.
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公开(公告)号：US11056246B2
公开(公告)日：2021-07-06
申请号：US15816952
申请日：2017-11-17
发明人： Blair P. Bromley
摘要： A channel type heterogeneous reactor core for a heavy water reactor for burnup of thorium based fuel is provided. The heterogeneous reactor core comprises at least one seed fuel channel region comprising seed fuel channels for receiving seed fuel bundles of thorium based fuel; and at least one blanket fuel channel region comprising blanket fuel channels for receiving blanket fuel bundles of thorium based fuel; wherein the seed fuel bundles have a higher percentage content of fissile fuel than the blanket fuel bundles. The seed fuel channel region and the blanket fuel channel region may be set out in a checkerboard pattern or an annular pattern within the heterogeneous reactor core. Fuel bundles for the core are also provided.
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公开(公告)号：US20200035369A1
公开(公告)日：2020-01-30
申请号：US16337647
申请日：2017-09-28
发明人： Frédéric SCHUSTER , Fernando LOMELLO , Francis MAURY , Alexandre MICHAU , Raphaël BOICHOT , Michel PONS
IPC分类号： G21C5/18 , G21C3/20 , G21C3/34 , G21C3/326 , C23C16/448 , C23C16/34 , C23C16/56 , C23C16/04 , C23C16/02
摘要： Process for manufacturing a nuclear component comprising i) a support containing a substrate based on a metal (1), the substrate (1) being coated or not coated with an interposed layer (3) positioned between the substrate (1) and at least one protective layer (2) and ii) the protective layer (2) composed of a protective material comprising amorphous chromium carbide; the process comprising a step a) of vaporizing a mother solution followed by a step b) of depositing the protective layer (2) onto the support via a process of chemical vapor deposition of an organometallic compound by direct liquid injection (DLI-MOCVD).Nuclear component comprising i) a support containing a substrate based on a metal, the substrate (1) being coated or not coated with an interposed layer (3) positioned between the substrate (1) and at least one protective layer (2) and ii) the protective layer (2) composed of a protective material comprising amorphous chromium carbide. The composite nuclear component manufactured by the process of the invention has improved resistance to oxidation, hydriding and/or migration of undesired material.The invention also relates to the use of the nuclear component for combating oxidation and/or hydriding.
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4.发明授权公开(公告)号：US10062459B2
公开(公告)日：2018-08-28
申请号：US14787986
申请日：2014-04-24
CPC分类号： G21C7/04 , C01G43/00 , C01P2002/76 , C01P2002/77 , C01P2004/82 , C01P2006/88 , G21C3/326 , Y02E30/38 , Y02E30/39
摘要： The present invention relates to a novel material made of uranium, gadolinium and oxygen, having a crystalline phase having cubic crystallographic structure, having an atomic ratio Gd/[Gd+U] of 0.6 to 0.93, the uranium being present in an oxidation state of +IV and/or +V. The invention further relates to the use of such a material as a consumable neutron poison of a fuel element.
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公开(公告)号：US20180075930A1
公开(公告)日：2018-03-15
申请号：US15816952
申请日：2017-11-17
发明人： Blair P. Bromley
摘要： A channel type heterogeneous reactor core for a heavy water reactor for burnup of thorium based fuel is provided. The heterogeneous reactor core comprises at least one seed fuel channel region comprising seed fuel channels for receiving seed fuel bundles of thorium based fuel; and at least one blanket fuel channel region comprising blanket fuel channels for receiving blanket fuel bundles of thorium based fuel; wherein the seed fuel bundles have a higher percentage content of fissile fuel than the blanket fuel bundles. The seed fuel channel region and the blanket fuel channel region may be set out in a checkerboard pattern or an annular pattern within the heterogeneous reactor core. Fuel bundles for the core are also provided.
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公开(公告)号：US20170301417A1
公开(公告)日：2017-10-19
申请号：US15444294
申请日：2017-02-27
发明人： Gregory J. Pearson , Atul A. Karve
CPC分类号： G21C3/326 , G21C19/205 , Y02E30/38
摘要： Cores include different types of control cells in different numbers and positions. A periphery of the core just inside the perimeter may have higher reactivity fuel in outer control cells, and lower reactivity cells may be placed in an inner core inside the inner ring. Cores can include about half fresh fuel positioned in higher proportions in the inner ring and away from inner control cells. Cores are compatible with multiple core control cell setups, including BWRs, ESBWRs, ABWRs, etc. Cores can be loaded during conventional outages. Cores can be operated with control elements in only the inner ring control cells for reactivity adjustment. Control elements in outer control cells need be moved only at sequence exchanges. Near end of cycle, reactivity in the core may be controlled with inner control cells alone, and control elements in outer control cells can be fully withdrawn.
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公开(公告)号：US09773573B2
公开(公告)日：2017-09-26
申请号：US14495957
申请日：2014-09-25
发明人： Jin Liu
摘要： An elongated control rod guide thimble for a nuclear reactor having a tube-in-tube dashpot design that has circumferential slots in the dashpot walls that align with spaced openings in the guide thimble sheath. The dashpot tube has an end plug with a threaded opening extending axially therethrough which is captured by a thimble screw that extend through an opening in the bottom nozzle and sandwiches an end plug attached to the guide thimble sheath between the dashpot tube end plug and the bottom nozzle.
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公开(公告)号：US09653188B2
公开(公告)日：2017-05-16
申请号：US13747685
申请日：2013-01-23
发明人： Young Woo Rhee , Dong-Joo Kim , Jong-Hun Kim , Jae-Jo Yang , Keon-Sik Kim , Yang-Hyun Koo
摘要： A fabrication method of burnable absorber nuclear fuel pellets and burnable absorber nuclear fuel pellets fabricated by the same are provided, in which the fabrication method includes adding boron compound and manganese compound to one or more type of nuclear fuel powders selected from the group consisting of uranium dioxide (UO2), plutonium dioxide (PuO2) and thorium dioxide (ThO2) and mixing the same (step 1), compacting the mixed powder of step 1 into compacts (step 2), and sintering the compacts of step 2 under hydrogen atmosphere (step 3). According to the fabrication method, sintering can be performed under hydrogen atmosphere at a temperature lower than the hydrogen atmosphere sintering that is conventionally applied in the nuclear fuel sintered pellet mass production, by adding sintering additives such as manganese oxide or the like.
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9.发明授权Light-water reactor fuel assembly (alternatives), a light-water reactor, and a fuel element of fuel assembly 有权轻水反应堆燃料组件（替代品），轻水反应堆和燃料组件的燃料元件公开(公告)号：US09355747B2
公开(公告)日：2016-05-31
申请号：US13139677
申请日：2008-12-25
CPC分类号： G21C3/02 , G21C1/024 , G21C3/326 , G21C3/3305 , G21C3/60 , G21C5/20 , G21C2003/3265 , Y02E30/32 , Y02E30/38
摘要： A 17×17 jacketless fuel assembly for a PWR-type light-water reactor uses thorium as the fuel. The fuel assembly has a square shape in the plan view, a seed region, a blanket region that encircles it, an upper nozzle, and a lower nozzle. The fuel elements of the seed region re arranged in the rows and columns of a square coordinate grid and have a four-lobed profile that forms spiral spacer ribs along the length of a fuel element. The blanket region contains a frame structure within which a bundle of fuel elements made from thorium with the addition of enriched uranium is positioned. The blanket region fuel elements are arranged in the two or three rows and columns of a square coordinate grid.
摘要翻译： 用于PWR型轻水反应堆的17×17无夹套燃料组件使用钍作为燃料。 燃料组件在平面图中具有正方形形状，种子区域，环绕它的毯子区域，上部喷嘴和下部喷嘴。 种子区域的燃料元件重新排列成正方形坐标网格的行和列，并且具有沿着燃料元件的长度形成螺旋间隔肋的四叶形轮廓。 覆盖区域包含框架结构，在该框架结构中，定位由钍制成的燃料元件组，并添加浓缩铀。 橡皮布区域燃料元件布置在正方形坐标网格的两行或三行和列中。
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公开(公告)号：US20160111174A1
公开(公告)日：2016-04-21
申请号：US14956469
申请日：2015-12-02
CPC分类号： G21C19/205 , G21C1/086 , G21C3/326 , G21C5/00 , G21C2003/3265 , G21Y2002/201 , G21Y2004/403 , Y02E30/38
摘要： An advanced initial core fuel configuration is for improving the fuel management efficiency and thus economics for a nuclear reactor. The advanced initial core fuel configuration includes a plurality of fuel assemblies having different average enrichments of uranium 235 and arranging the fuel assemblies in an initial core configuration structured to emulate a known equilibrium reload cycle core at least in terms of spatial reactivity distribution. The resulting average enrichment within the initial core ranges from below about 1.0 percent weight of uranium 235 to about 5.0 percent weight of uranium 235. An advanced lattice design is also disclosed.
摘要翻译： 先进的初始核燃料配置是提高燃料管理效率，从而提高核反应堆的经济性。 先进的初始核心燃料配置包括多个燃料组件，其具有不同的铀235的平均浓度，并且将燃料组件布置成初始的核心配置，其结构至少根据空间反应性分布来模拟已知的平衡重新加载循环核心。 初始核中的所得平均浓度范围从铀235的约1.0重量％至铀235的约5.0重量％。还公开了先进的晶格设计。
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