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    A FUEL ASSEMBLY FOR A LIGHT WATER NUCLEAR REACTOR
    1.
    发明公开
    A FUEL ASSEMBLY FOR A LIGHT WATER NUCLEAR REACTOR 审中-公开

    公开(公告)号：EP3796334A3

    公开(公告)日：2021-06-23

    申请号：EP20187454.2

    申请日：2008-12-25

    申请人： Thorium Power, Inc.

    发明人： BASHKIRTSEV, Sergey Mikhailovich ,  KUZNETSOV, Valentin Fedorovich ,  KEVROLEV, Valery Vladimirovich ,  MOROZOV, Alexey Glebovich

    IPC分类号： G21C3/326 ,  G21C3/02 ,  G21C1/00 ,  G21C1/02 ,  G21C3/33 ,  G21C3/60 ,  G21C5/20

    摘要： A fuel assembly for a light-water nuclear reactor with a square shape in the plan view and comprising a seed region, including a bundle of seed fuel elements that are arranged in the rows and columns of a square coordinate grid in a cross-section; wherein each seed fuel element has a four-lobed profile forming spiral ribs, and comprises a kernel that includes enriched uranium or plutonium; and a blanket region, surrounding the seed region and including a bundle of breeding fuel elements; wherein, when viewed in a plan-view cross-section, the breeding fuel elements are arranged in the rows and columns of a square coordinate grid, and the breeding fuel elements define a plurality of square-shaped rings surrounding the seed region; and wherein each of the seed fuel elements defines a first circumscribed diameter defined by a circle circumscribing the seed fuel element, and each of the breeding fuel elements defines a second circumscribed diameter defined by a circle circumscribing the breeding fuel element that is different than the first circumscribed diameter.

    STEAM GENERATOR FOR A NUCLEAR REACTOR
    4.
    发明公开
    STEAM GENERATOR FOR A NUCLEAR REACTOR 审中-公开
    蒸汽发生器用于核反应堆

    公开(公告)号：EP2859556A2

    公开(公告)日：2015-04-15

    申请号：EP13777696.9

    申请日：2013-04-19

    申请人： NuScale Power, LLC

    发明人： GROOME, John T. ,  JOH, Sooyun ,  NYLANDER, James Allan

    IPC分类号： G21C15/00 ,  G21C1/00

    CPC分类号： G21C15/16 ,  F22B1/162 ,  G21C1/322 ,  G21D1/006 ,  Y02E30/40

    摘要： A steam generator for a nuclear reactor comprises plenums proximate with a first plane, wherein the first plane intersects a bottom portion of a riser column of a reactor vessel. The steam generator may further comprise plenums proximate with a second plane, approximately parallel with the first plane, wherein the second plane intersects a top portion of the riser column of the reactor vessel. The steam generator may further include a plurality of steam generator tubes that convey coolant from a plenum located proximate with the first plane to one of the plenums proximate with the second plane.

    A NUCLEAR FUEL ASSEMBLY GRID WITH DIAGONAL FUEL RETAINING SPRINGS
    8.
    发明授权
    A NUCLEAR FUEL ASSEMBLY GRID WITH DIAGONAL FUEL RETAINING SPRINGS 失效
    网格的核燃料棒束对角线燃料棒END STOP SPRING

    公开(公告)号：EP0992038B1

    公开(公告)日：2004-09-15

    申请号：EP98931584.1

    申请日：1998-06-25

    申请人： Westinghouse Electric Company LLC

    发明人： NGUYEN, Quang, M. ,  DEMARIO, Edmund, E.

    IPC分类号： G21C1/00

    CPC分类号： G21C3/3563 ,  Y02E30/40

    摘要： A support grid for laterally maintaining the relative position of elongated fuel elements within a fuel assembly for use within a core of a nuclear reactor. The grid is formed in the shape of a lattice with the intersecting lattice members defining a plurality of cells, most of which respectively support the nuclear fuel elements. The remaining cells support nuclear control rod guide tubes and instrumentation thimbles. The cells supporting the nuclear fuel elements are provided with diagonally positioned springs on two adjacent walls. The springs support the fuel elements against dimples which protrude from the opposite cell walls. The adjacent, diagonal springs in each fuel elements cell are inclined in opposite directions. The springs are formed from narrow, parallel slits in the cell wall that terminate along a line parallel to the line of intersection with the adjacent wall. The spring slits continue along that parallel line in a direction away from the spring to increase its flexure. The lattice is formed in an "egg-crate" pattern with the orthogonal members fitting over opposing vertical slits in the adjoining straps. The vertical slits are extended more than half way over the width of the straps to further increase the flexure of the retaining springs.

    METHOD FOR CARRYING OUT A FISSION NUCLEAR CHAIN REACTION ON RESONANCE NEUTRONS
    9.
    发明公开
    METHOD FOR CARRYING OUT A FISSION NUCLEAR CHAIN REACTION ON RESONANCE NEUTRONS 审中-公开
    VERFAHREN ZUR DURCHFHHUNG EINEN KERNSPALTUNGSKETTENREAKTION麻省理工学院RESONANZNEUTRONEN

    公开(公告)号：EP1024501A4

    公开(公告)日：2001-08-29

    申请号：EP98940070

    申请日：1998-08-13

    申请人： OTKRYTOE AKTSIONERNOE OBSCHEST

    发明人： IRDINCHEEV LJUMMIR ANANIEVICH ,  IVANOV ANDREI AKIMOVICH ,  MALOFEEV ALEXANDR MIKHAILOVICH ,  ORLOV VIKTOR VLADIMIROVICH ,  ROTOTAEV DMITRY ALEXANDROVICH

    IPC分类号： G21C1/00 ,  G21C7/34 ,  G21D7/00 ,  G21C1/22 ,  G21C7/30 ,  G21G1/02

    CPC分类号： G21C7/34 ,  G21D7/00 ,  G21Y2002/201 ,  G21Y2004/40 ,  Y02E30/34 ,  Y02E30/39

    摘要： The present invention relates to the nuclear engineering and is designed to produce a nuclear fission chain reaction for obtaining large fluences of neutrons, gamma-ray quanta, and producing thermal and electric power. It is an object of the invention to reduce mass and improve the usage efficiency of nuclear fuel in the nuclear reactor core. The invention is essentially based on the fact that all of the fast neutrons can be slowed down, substantially without losses, to thermal energies at which they may be considered stationary when arriving at the vacuum magnetic trap as their velocity is low as compared to the velocity of the fissile material nuclei movement, and, therefore, all of them may react even at a relatively low density of the fissile material. The fissile material critical mass in the reactor core is considerably reduced (up to few grams or tens of grams). The invention ensures that great energies, (1000 megawatt and greater) can be released in the reactor core as the fission products containing more then 90 percent of the nuclear power released may be removed from the reactor core and directed to the facilities for direct conversion of their energy. e.g., into electricity. The nuclear reactor is substantially safe from the environmental standpoint as at any given time the amount of the fissile material in the reactor core will not exceed few tens of grams.

    摘要翻译： 本发明涉及核工程，并被设计用于产生用于获得大量中子，γ射线量子并产生热和电功率的核裂变链反应。 本发明的目的是减少核反应堆核中的核燃料的质量和提高其使用效率。 本发明基本上是基于以下事实：所有的快中子可以基本上没有损失地减速到热能，在它们到达真空磁捕获器时它们可能被认为是静止的，因为它们的速度与速度相比是低的 的裂变材料核运动，因此，即使在易裂变材料的密度相对较低的情况下，它们都可能发生反应。 反应堆核心中的裂变材料临界质量显着降低（达几克或几十克）。 本发明确保了在反应堆堆芯中能够释放（1000兆瓦或更大）的巨大能量，因为含有超过90％的释放的核能的裂变产物可以从反应堆堆芯中取出并被引导到直接转化 他们的精力 例如进入电力。 核反应堆在环境方面基本上是安全的，因为在任何给定时间，反应堆核心中的裂变材料的量不会超过几十克。

    A NUCLEAR REACTOR DEVICE AND A METHOD TO CONSTRUCT A NUCLEAR REACTOR DEVICE
    10.
    发明公开
    A NUCLEAR REACTOR DEVICE AND A METHOD TO CONSTRUCT A NUCLEAR REACTOR DEVICE 失效
    核反应堆装置及其制造方法

    公开(公告)号：EP0978126A1

    公开(公告)日：2000-02-09

    申请号：EP98917929.6

    申请日：1998-04-21

    申请人： ABB ATOM AB

    发明人： CALLIN, Jan-Eric ,  CARLSSON, Claes ,  IVUNG, Bengt ,  KUKKOLA, Timo

    IPC分类号： G21C1/00 ,  G21C21/00 ,  E04G11/22

    CPC分类号： G21C13/093 ,  G21C13/00 ,  Y02E30/40

    摘要： The invention refers to a nuclear reactor device and a method of constructing a nuclear reactor device. The device comprises a reactor containment (1), formed by a first wall member (2) defining an inner space (3), and a reactor vessel (6), housing a reactor core (7) and being provided in the inner space (3). Furthermore, the device comprises an upper space (10) provided above the reactor containment (1) and defined by a second wall member (11). The first wall member (2) and the second wall member (11) have, seen in a horizontal section, an essentially identical cross-sectional shape and form an essentially common cylinder.