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公开(公告)号：US20070201605A1
公开(公告)日：2007-08-30
申请号：US11680098
申请日：2007-02-28
申请人： Kazuya ISHII , Motoo AOYAMA , Tetsushi HINO
发明人： Kazuya ISHII , Motoo AOYAMA , Tetsushi HINO
IPC分类号： G21C1/04
摘要： A core disposed in a reactor pressure vessel includes one layer (an outermost region) at an outermost side of the core, two-three layers (an outer region) inside the outermost region and other layers (an inner region) inside the outer region. Fuel assemblies arranged in the core are supported by fuel supports having orifice. Orifice pressure loss coefficient of the orifice in the outermost region is set to be maximum and the orifice pressure loss coefficient of the orifice in the outer region is set to be minimum such that the flow rate of the coolant W for each fuel assembly in the outermost region is lowest and that for each fuel assembly in the outer region is highest. In the core of the natural circulation boiling water reactor, the reactor power distribution in a radial direction is flattened, and it is possible to increase the thermal margin.
摘要翻译： 设置在反应堆压力容器中的芯包括在芯的最外侧的一层（最外侧区域），最外侧区域内的两层（外部区域）和外部区域内的其他层（内部区域）。 布置在芯中的燃料组件由具有孔口的燃料支撑件支撑。 将最外侧区域的孔口的孔口压力损失系数设定为最大，并且将外部区域中的孔口的孔口压力损失系数设定为最小，使得最外侧的每个燃料组件的冷却剂W的流量 区域是最低的，并且对于外部区域中的每个燃料组件的最高。 在自然循环沸水反应堆的核心，反应堆在径向方向的功率分布是平坦的，并且可以增加热裕度。
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公开(公告)号：US20080317191A1
公开(公告)日：2008-12-25
申请号：US11765486
申请日：2007-06-20
申请人： Masao Chaki , Motoo Aoyama , Tetsushi Hino , Kazuya Ishii
发明人： Masao Chaki , Motoo Aoyama , Tetsushi Hino , Kazuya Ishii
IPC分类号： G21C7/32
摘要： The present invention decreases the temperature of feed water supplied to the reactor of a set power when the flow rate of coolant supplied to the core of the reactor increases in the end of an operation cycle. This operating method can increase the thermal power of the nuclear power generation plant and increase the economical efficiency of fuel even when the operation cycle is prolonged. Particularly, even when the core flow rate increases in the end of the operation cycle, this method can suppress the rise of the cooling water temperature at the inlet of the core. Consequently, this invention can make the reactivity gain higher than that when the core flow rate is singly increased.The present invention can increase the thermal power of a nuclear reactor, and can improve the economical efficiency of fuel even when a period of an operation cycle is made longer.
摘要翻译： 本发明在供给到反应堆的核心的冷却剂的流量在操作循环结束时增加时，将供给反应器的供给水的温度降低到设定功率。 这种操作方法可以增加核发电厂的热功率，并且即使在延长操作周期时也可提高燃料的经济效率。 特别是即使在运转循环结束时核心流量增加的情况下，也能够抑制芯体入口处的冷却水温度升高。 因此，本发明可以使反应性增益高于芯流量单独增加时的反应性增益。 本发明可以增加核反应堆的热功率，并且即使在使操作周期更长的时间内也能提高燃料的经济性。
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公开(公告)号：US20070274428A1
公开(公告)日：2007-11-29
申请号：US11668028
申请日：2007-01-29
申请人： Masao CHAKI , Tetsushi Hino
发明人： Masao CHAKI , Tetsushi Hino
IPC分类号： G21C19/42
摘要： The natural circulation type boiling water reactor comprises a core in which a plurality of fuel assemblies are loaded, and a chimney which is disposed above the core and has a path partition which forms a plurality of vertical lattice paths. A uniform pressure space is formed between the core and the chimney and not disposed the path partition. The two-phase flow including the cooling water and the steam exhausted from the core through the uniform pressure space is supplied to the vertical lattice paths. The two-phase flow ascends in the vertical lattice paths. Thus, the flow distribution for each fuel assembly can be calculated using the pressure difference between the upper end and the lower end of the core can be calculated without the need for the void fraction of the lattice paths.
摘要翻译： 自然循环式沸水反应堆包括其中装载有多个燃料组件的芯和设置在芯上方并且具有形成多个垂直格栅路径的路径分隔的烟囱。 在核心和烟囱之间形成均匀的压力空间，而不设置路径隔板。 包括冷却水和通过均匀压力空间从芯排出的蒸汽的两相流被提供给垂直格栅路径。 两相流在垂直格子路径中上升。 因此，可以计算出每个燃料组件的流量分布，而不需要格子路径的空隙率，可以计算出核心的上端和下端之间的压力差。
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公开(公告)号：US08311180B2
公开(公告)日：2012-11-13
申请号：US12332376
申请日：2008-12-11
申请人： Takeshi Mitsuyasu , Motoo Aoyama , Tetsushi Hino
发明人： Takeshi Mitsuyasu , Motoo Aoyama , Tetsushi Hino
IPC分类号： G21C3/00
摘要： A fuel assembly, comprising: a plurality of first fuel rods including uranium and not including a burnable poison; a plurality of second fuel rods including said uranium and said burnable poison; and a water rod; wherein said second fuel rods are placed at corners of an outermost layer of a fuel rod array; other second fuel rods are placed, in said outermost layer, adjacent to said second fuel rods placed at said corners; and other second fuel rods are placed adjacent to said water rod.
摘要翻译： 一种燃料组件，包括：多个包括铀的第一燃料棒，不包括可燃毒物; 包括所述铀和所述可燃毒物的多个第二燃料棒; 和水棒; 其中所述第二燃料棒放置在燃料棒阵列的最外层的拐角处; 其他第二燃料棒在所述最外层中与放置在所述角部处的所述第二燃料棒相邻; 并且其他第二燃料棒放置在与所述水棒相邻的位置。
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公开(公告)号：US20120063561A1
公开(公告)日：2012-03-15
申请号：US13222366
申请日：2011-08-31
IPC分类号： G21C3/32
摘要： A fuel assembly has a constitution in which plural fuel rods are arranged in 10 rows by 10 columns in a channel box, and includes plural fuel rods G containing gadolinium and plural partial length fuel rods P. In the fuel assembly, average enrichment of lower portion cross section is approximately 4.6 wt %, and average enrichment of upper portion cross section is approximately 4.7 wt %. The average enrichments at the outermost layer are approximately 5.6 wt % both in the upper portion and the lower portion. Ratios e/x of the average enrichment of the outermost layer e (wt %) to the average enrichment of the fuel assembly cross section x (wt %) are 1.19 in the upper portion and 1.22 in the lower portion, and the ratios satisfy equation (1). [ Equation 1 ] e x ≥ - 18.3 ( x 10 ) 5 + 68.766 ( x 10 ) 4 - 101.77 ( x 10 ) 3 + 74.428 ( x 10 ) 2 - 27.372 ( x 10 ) + 5.1682 ( 1 )
摘要翻译： 燃料组件具有多个燃料棒在通道箱中以10行×10列排列的结构，并且包括含有钆和多个部分长度的燃料棒P的多个燃料棒G.在燃料组件中，下部的平均浓缩 横截面为约4.6重量％，上部截面的平均富集度为约4.7重量％。 最外层的平均浓度在上部和下部均为5.6重量％左右。 最外层e（wt％）对燃料组件横截面x（wt％）的平均富集度的平均富集比例e / x在上部为1.19，下部为1.22，比率满足式 （1）。 （x 10）4 - 101.77（x 10）3 + 74.428（x 10）2 - 27.372（x 10）+ 5.1682（x 10） （1）
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6.发明申请METHOD FOR OPERATING NUCLEAR POWER GENERATION PLANT AND NUCLEAR POWER GENERATION PLANT 审中-公开核动力发电厂和核发电厂的运行方法公开(公告)号：US20090141847A1
公开(公告)日：2009-06-04
申请号：US12324936
申请日：2008-11-28
申请人： Tetsushi HINO , Masao CHAKI , Motoo AOYAMA , Takeshi MITSUYASU , Yoshihiko ISHII
发明人： Tetsushi HINO , Masao CHAKI , Motoo AOYAMA , Takeshi MITSUYASU , Yoshihiko ISHII
摘要： An method for operating a nuclear power generation plant, comprising the steps of: forming a plurality of control rod patterns by operating a plurality of control rods during a first period of one operation cycle of a reactor including said first period before a point of time when all control rods are completely withdrawn from a core of said reactor and a core flow rate reaches firstly a set core flow rate, and a second period after said point of time, controlling stepwise at least once a temperature of feed water supplied to said reactor based on a different set feed water temperature during a period included in said first period for operating said reactor with a formed same control rod pattern, and continuing feed water temperature control based on said set feed water temperature until said core flow rate reaches a set core flow rate set based on said set feed water temperature.
摘要翻译： 一种用于操作核发电厂的方法，包括以下步骤：通过在包括所述第一时段的电抗器的一个操作周期的第一周期期间操作多个控制棒来形成多个控制棒图案， 所有控制棒从所述反应器的核心完全取出，并且芯流速率首先达到设定的核心流速，并且在所述时间点之后的第二时间段内，逐步控制供应到所述反应器的给水温度至少一次 在包括在用于以所形成的相同控制杆模式操作所述反应器的所述第一时段期间的不同设定进料水温度下，以及基于所述设定的给水温度继续供水温度控制，直到所述芯流量达到设定的芯流量 基于所述设定的给水温度设定速率。
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公开(公告)号：US20090252282A1
公开(公告)日：2009-10-08
申请号：US12332376
申请日：2008-12-11
申请人： Takeshi MITSUYASU , Motoo Aoyama , Tetsushi Hino
发明人： Takeshi MITSUYASU , Motoo Aoyama , Tetsushi Hino
IPC分类号： G21C3/32
摘要： A fuel assembly, comprising: a plurality of first fuel rods including uranium and not including a burnable poison; a plurality of second fuel rods including said uranium and said burnable poison; and a water rod; wherein said second fuel rods are placed at corners of an outermost layer of a fuel rod array; other second fuel rods are placed, in said outermost layer, adjacent to said second fuel rods placed at said corners; and other second fuel rods are placed adjacent to said water rod.
摘要翻译： 一种燃料组件，包括：多个包括铀的第一燃料棒，不包括可燃毒物; 包括所述铀和所述可燃毒物的多个第二燃料棒; 和水棒; 其中所述第二燃料棒放置在燃料棒阵列的最外层的拐角处; 其他第二燃料棒在所述最外层中与放置在所述角部处的所述第二燃料棒相邻; 并且其他第二燃料棒放置在与所述水棒相邻的位置。
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