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    Nuclear reactor core loading and operation strategies
    2.
    发明授权
    Nuclear reactor core loading and operation strategies 有权

    公开(公告)号：US11742095B2

    公开(公告)日：2023-08-29

    申请号：US17163558

    申请日：2021-01-31

    申请人： GLOBAL NUCLEAR FUEL—AMERICAS, LLC

    发明人： Gregory J. Pearson ,  Atul A. Karve

    IPC分类号： G21C19/20 ,  G21C3/326

    CPC分类号： G21C3/326 ,  G21C19/205 ,  Y02E30/30

    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in the core may be controlled with inner control cells alone, and control elements in outer control cells can be fully withdrawn.

    SYSTEMS AND METHODS FOR DEBRIS-FREE NUCLEAR COMPONENT HANDLING
    3.
    发明申请
    SYSTEMS AND METHODS FOR DEBRIS-FREE NUCLEAR COMPONENT HANDLING 审中-公开

    公开(公告)号：US20200211722A1

    公开(公告)日：2020-07-02

    申请号：US16237628

    申请日：2018-12-31

    申请人： Global Nuclear Fuel - Americas, LLC

    发明人： Brett M. Schulz ,  David W. Webber

    IPC分类号： G21C3/32 ,  G21C3/10

    摘要： Packaging structures and systems are used for handling components for use in a nuclear reactor. The packaging protects the component during transport and handling and then dissolves in liquid in the nuclear reactor or fuel pool. The packaging need not be removed, as so can block flow paths or otherwise interfere with operability were it not for its dissolution. The packaging may include shock absorbers in a fuel assembly or a seal on a water rod in the assembly. Mechanical, frictional, or chemical retaining materials may be used to secure the packaging and may also dissolve in the liquid. For a light water reactor, polymers, protein gels, and plastics can all be used where they will dissolve in the water and are otherwise compatible with reactor chemistry and neutronics. Materials with higher temperatures for solubility may be used because they will dissolve when reactor operations commence.

    Fuel rods with wear-inhibiting coatings
    7.
    发明授权
    Fuel rods with wear-inhibiting coatings 有权

    公开(公告)号：US10957456B2

    公开(公告)日：2021-03-23

    申请号：US15911536

    申请日：2018-03-05

    申请人： GLOBAL NUCLEAR FUEL—AMERICAS, LLC

    发明人： Kevin L. Ledford ,  Yuk-Chiu Lau ,  David W. White ,  Yang-Pi Lin ,  Paul E. Cantonwine ,  Nicholas R. Gullette ,  Timothy W. Clark

    IPC分类号： G21C3/07 ,  G21C21/02 ,  C23C24/04

    摘要： Nuclear reactor components are treated with thermal methods to increase wear resistance. Example treatments include thermal treatments using particulate or powderized materials to form a coating. Methods can use cold spray, with low heat and high velocities to blast particles on the surface. The particles impact and mechanically deform, forming an interlocking coating with the surface and each other without melting or chemically reacting. Materials in the particles and resultant coatings include metallic alloys, ceramics, and/or metal oxides. Nuclear reactor components useable with methods of increased wear resistance include nuclear fuel rods and assemblies containing the same. Coatings may be formed on any desired surface, including fuel rod positions where spacer contact and fretting is most likely.

    Nuclear reactor core loading and operation strategies
    8.
    发明授权
    Nuclear reactor core loading and operation strategies 有权

    公开(公告)号：US10930404B2

    公开(公告)日：2021-02-23

    申请号：US15444294

    申请日：2017-02-27

    申请人： Global Nuclear Fuel—Americas, LLC

    发明人： Gregory J. Pearson ,  Atul A. Karve

    IPC分类号： G21C3/326 ,  G21C19/20

    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.

    NUCLEAR REACTOR FLUENCE REDUCTION SYSTEMS AND METHODS
    10.
    发明申请
    NUCLEAR REACTOR FLUENCE REDUCTION SYSTEMS AND METHODS 有权
    核反应堆流体减少系统和方法

    公开(公告)号：US20150170768A1

    公开(公告)日：2015-06-18

    申请号：US14109461

    申请日：2013-12-17

    申请人： Global Nuclear Fuel - Americas, LLC

    发明人： John P. Rea

    IPC分类号： G21C7/06 ,  G21C7/24

    CPC分类号： G21C7/06 ,  G21C3/326 ,  G21C5/02 ,  G21C7/24 ,  G21C11/022 ,  G21C11/024 ,  Y02E30/38

    摘要： Nuclear fuel assemblies include at least one fluence control structure for use in a nuclear reactor core with other nuclear fuel assemblies. Such flux-limiting assemblies and structures may be positioned outside of or around the other nuclear fuel assemblies in the core so as to reduce neutron flux beyond the fluence controlled nuclear fuel assemblies, and fluence control structures may be positioned at an outside edge of the core. Fluence control structures limit neutron flux with non-fuel materials in structures like fuel rods and inserts, channels, shield curtains, etc. at particular positions in fuel assemblies. An engineer may select and/or install fluence-limiting fuel assemblies with flux-limiting characteristics in cores having neutronics profiles expected to benefit from such flux limitation.

    摘要翻译： 核燃料组件包括至少一个用于具有其他核燃料组件的核反应堆堆芯的注量控制结构。 这种磁通限制组件和结构可以位于芯中的其他核燃料组件的外部或周围，以便减少超过注量控制的核燃料组件的中子通量，并且注量控制结构可以位于芯的外部边缘 。 流量控制结构在燃料组件中特定位置的燃料棒和插入件，通道，屏蔽窗等结构中限制了非燃料材料的中子通量。 工程师可以选择和/或安装具有通量限制特性的限流燃料组件，其核心具有预期受益于这种通量限制的中子特征。