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公开(公告)号：US4378329A
公开(公告)日：1983-03-29
申请号：US158363
申请日：1980-06-11
CPC分类号： G21C7/04 , G21C5/00 , G21Y2002/201 , G21Y2004/10 , G21Y2004/30 , Y02E30/39
摘要： A core construction for a nuclear reactor having a multiplicity of fuel cells forming a core in which each fuel cell includes four fuel assemblies arranged in adjacent relationship and one control rod insertable into a position surrounded by the four fuel assemblies. The fuel cells includes first fuel cells each having a relatively high cell mean infinite neutron multiplication factor and including one fuel assembly containing a burnable poison, and second fuel cells each having a relatively low cell mean infinite neutron multiplication factor and including no fuel assembly containing a burnable poison. The first fuel cells are arranged both in a central zone of the core disposed within about one-half the core radius from the center of the core and in a circumferential zone of the core outside the central zone. The second fuel cells are arranged only in the central zone and no second fuel cells are arranged in the circumferential zone. Only the second fuel cells provide control cells in which the control rods are operative to adjust core reactivity changes and power distribution changes during normal power operation of the reactor.
摘要翻译： 一种用于核反应堆的核心结构，其具有形成核心的多个燃料电池，其中每个燃料电池包括相邻关系排列的四个燃料组件，以及可插入由四个燃料组件包围的位置的一个控制棒。 燃料电池包括每个具有相对高的电池平均无限中子倍增因子的第一燃料电池，并且包括一个包含可燃毒物的燃料组件，以及每个具有相对低的电池平均无限中子倍增因子的第二燃料电池，并且不包括燃料组件， 可燃毒 第一燃料电池被布置在核心的中心区域中，该中心区域设置在离核心的中心大约一半半径的芯半径处，并且在芯部的圆周区域中央区域外部。 第二燃料电池仅布置在中心区域中，并且在周向区域中不设置第二燃料电池。 只有第二燃料电池提供控制电池，其中控制棒可操作以在电抗器的正常电力操作期间调节铁心反应性变化和配电变化。
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公开(公告)号：US4324615A
公开(公告)日：1982-04-13
申请号：US098633
申请日：1979-11-29
申请人： Yasuhiro Kobayashi , Renzo Takeda
发明人： Yasuhiro Kobayashi , Renzo Takeda
CPC分类号： G21C5/00 , G21C7/04 , G21Y2002/201 , G21Y2004/10 , G21Y2004/30 , Y02E30/39
摘要： There is provided a novel initial core arrangement of a nuclear reactor. The fuel assemblies in the central region of the reactor core occupying more than 50% of the total area of the reactor core are grouped into a plurality of fuel units each of which being constituted by four adjacent fuel assemblies. The fuel assemblies in each fuel unit are replaced one by one at each fuel replacement cycle with a new fuel assembly. The initial core is so arranged that each fuel unit has one gadolinia containing high enrichment fuel assembly and three low enrichment fuel assemblies containing no gadolinea. This arrangement permits a stable reactor operation substantially equivalent to that obtained in the state of equilibrium (equilibrium core), even with an initial core.
摘要翻译： 提供了核反应堆的新颖的初始核心安排。 占反应堆堆芯总面积的50％以上的反应堆核心区域的燃料组件分成多个燃料单元，每个燃料单元由四个相邻的燃料组件构成。 每个燃料单元中的燃料组件在每个燃料更换周期用一个新的燃料组件逐一替换。 初始核心是如此布置，使得每个燃料单元具有含有高浓缩燃料组件的一个氧化钆和不含钆的三种低浓缩燃料组件。 这种布置允许稳定的反应器操作基本上等于在平衡状态（平衡核）中获得的稳定的反应器操作，即使使用初始核。
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公开(公告)号：US20120177169A1
公开(公告)日：2012-07-12
申请号：US13411091
申请日：2012-03-02
申请人： Renzo Takeda , Junichi Miwa , Kumiaki Moriya
发明人： Renzo Takeda , Junichi Miwa , Kumiaki Moriya
CPC分类号： G21C3/326 , G21C3/42 , G21C2003/3267 , Y02E30/38
摘要： A core of a light water reactor having a plurality of fuel assemblies, which are loaded in said core, having nuclear fuel material containing a plurality of isotopes of transuranium nuclides, an upper blanket zone, a lower blanket zone, and a fissile zone, in which the transuranium nuclides are contained, disposed between the upper blanket zone and the lower blanket zone, wherein a ratio of Pu-239 in all the transuranium nuclides contained in the loaded fuel assembly is in a range of 40 to 60% when burnup of the fuel assembly is 0, sum of a height of the lower blanket zone and a height of the upper blanket zone is in a range of 250 to 600 mm, and the height of said lower blanket zone is in a range of 1.6 to 12 times the height of the upper blanket zone.
摘要翻译： 具有多个燃料组件的轻水反应堆的核心，其装载在所述芯体中，具有含有多个氮氧化物的多个同位素的核燃料材料，上覆层区域，下覆盖区域和裂变区域 其中包含超氧化物核素，其设置在上覆盖区域和下覆盖层区域之间，其中，当燃烧所述载体燃料组件时，包含在所述负载的燃料组件中的所有经核素核素中的Pu-239的比例在40至60％的范围内 燃料组件为0，下橡皮布区域的高度与上覆层区域的高度之和在250至600mm的范围内，并且所述下橡皮布区域的高度在1.6至12倍的范围内 上层毯的高度。
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公开(公告)号：US5145635A
公开(公告)日：1992-09-08
申请号：US669378
申请日：1991-03-14
申请人： Kazuya Ishii , Motoo Aoyama , Yoshihiko Ishii , Sadao Uchikawa , Renzo Takeda , Osamu Yokomizo
发明人： Kazuya Ishii , Motoo Aoyama , Yoshihiko Ishii , Sadao Uchikawa , Renzo Takeda , Osamu Yokomizo
CPC分类号： G21C3/328 , G21Y2002/201 , G21Y2002/207 , G21Y2004/10 , G21Y2004/30 , Y02E30/38
摘要： A high conversion nuclear reactor core has fuel assemblies made up from large numbers of axially-extending uranium-plutonium mixed oxide fuel rods. The fuel rods are densely packed so as to give a high conversion ratio of fissile substances, preferably approaching unity. The average plutonium enrichment in the assemblies is higher in their bottom, upstream halves, than in their top downstream halves. This has the effect of reducing a potentially dangerously high void coefficient in the core.
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公开(公告)号：US08571166B2
公开(公告)日：2013-10-29
申请号：US13411091
申请日：2012-03-02
申请人： Renzo Takeda , Junichi Miwa , Kumiaki Moriya
发明人： Renzo Takeda , Junichi Miwa , Kumiaki Moriya
IPC分类号： G21C3/00
CPC分类号： G21C3/326 , G21C3/42 , G21C2003/3267 , Y02E30/38
摘要： A core of a light water reactor having a plurality of fuel assemblies, which are loaded in said core, having nuclear fuel material containing a plurality of isotopes of transuranium nuclides, an upper blanket zone, a lower blanket zone, and a fissile zone, in which the transuranium nuclides are contained, disposed between the upper blanket zone and the lower blanket zone, wherein a ratio of Pu-239 in all the transuranium nuclides contained in the loaded fuel assembly is in a range of 40 to 60% when burnup of the fuel assembly is 0, sum of a height of the lower blanket zone and a height of the upper blanket zone is in a range of 250 to 600 mm, and the height of said lower blanket zone is in a range of 1.6 to 12 times the height of the upper blanket zone.
摘要翻译： 具有多个燃料组件的轻水反应堆的核心，其装载在所述芯体中，具有含有多个氮氧化物的多个同位素的核燃料材料，上覆层区域，下覆盖区域和裂变区域 其中包含超氧化物核素，其设置在上覆盖区域和下覆盖层区域之间，其中，当燃烧所述载体燃料组件时，包含在所述负载的燃料组件中的所有经核素核素中的Pu-239的比例在40至60％的范围内 燃料组件为0，下橡皮布区域的高度与上覆层区域的高度之和在250至600mm的范围内，并且所述下橡皮布区域的高度在1.6至12倍的范围内 上层毯的高度。
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公开(公告)号：US08422617B2
公开(公告)日：2013-04-16
申请号：US12537452
申请日：2009-08-07
申请人： Renzo Takeda , Junichi Miwa , Kumiaki Moriya
发明人： Renzo Takeda , Junichi Miwa , Kumiaki Moriya
IPC分类号： G21C1/04
CPC分类号： G21C3/326 , G21C3/42 , G21C2003/3267 , Y02E30/38
摘要： A core of a light water reactor having a plurality of fuel assemblies, which are loaded in said core, having nuclear fuel material containing a plurality of isotopes of transuranium nuclides, an upper blanket zone, a lower blanket zone, and a fissile zone, in which the transuranium nuclides are contained, disposed between the upper blanket zone and the lower blanket zone; wherein a ratio of Pu-239 in all the transuranium nuclides contained in the loaded fuel assembly is in a range of 40 to 60% when burnup of the fuel assembly is 0; sum of a height of the lower blanket zone and a height of the upper blanket zone is in a range of 250 to 600 mm; and the height of said lower blanket zone is in a range of 1.6 to 12 times the height of the upper blanket zone.
摘要翻译： 具有多个燃料组件的轻水反应堆的核心，其装载在所述芯体中，具有含有多个氮氧化物的多个同位素的核燃料材料，上覆层区域，下覆盖区域和裂变区域 其中包含超氧化物核素，设置在上覆盖区域和下覆盖区域之间; 其中，当所述燃料组件的燃耗为0时，包含在所述装载的燃料组件中的所有超铀核素中的Pu-239的比率在40至60％的范围内; 下橡皮布区域的高度和上覆层区域的高度之和在250至600mm的范围内; 并且所述下覆盖带的高度在上毯区的高度的1.6至12倍的范围内。
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公开(公告)号：US4400343A
公开(公告)日：1983-08-23
申请号：US085686
申请日：1979-10-17
申请人： Masayuki Izumi , Renzo Takeda
发明人： Masayuki Izumi , Renzo Takeda
摘要： The pressure P.sub.R in the reactor pressure vessel, the flow rate W.sub.c of the cooling water flowing through the core in the reactor pressure vessel, and the flow rate W.sub.STM of the steam supplied from the reactor pressure vessel to the turbine are detected. The enthalpy H.sub.f of the saturated cooling water is determined on the basis of the pressure P.sub.R. The values of the cooling water flow rate W.sub.c, the steam flow rate W.sub.STM, the enthalpy H.sub.f of the saturated cooling water and a predetermined enthalpy H.sub.IN of the cooling water at the core inlet are substituted into the equation below thereby to obtain the enthalpy H.sub.fw of the feed water. ##EQU1## An error is determined between the feed-water enthalpy H.sub.fw thus obtained and the enthalpy T.sub.fw of the feed water actually supplied into the reactor pressure vessel, and on the basis of this error, the opening of the flow rate control valve on the turbine bleeding pipe is adjusted, so that the flow rate of the steam bled from the turbine for heating the feed water is adjusted according to the error.
摘要翻译： 检测反应堆压力容器中的压力PR，流过反应堆压力容器中的芯的冷却水的流量Wc以及从反应堆压力容器供给到涡轮的蒸汽的流量WSTM。 基于压力PR确定饱和冷却水的焓Hf。 将冷却水流量Wc，蒸汽流量WSTM，饱和冷却水的焓Hf和核心入口处的冷却水的预定焓HIN的值代入下面的等式，由此获得焓Hfw 给水。
在这样获得的给水焓Hfw与实际供应到反应堆压力容器中的进料水的焓Tfw之间确定误差，并且基于该误差，流量控制阀在 涡轮排气管被调节，从而根据误差调节从涡轮机排出的用于加热给水的蒸汽的流量。 -
公开(公告)号：US08599991B2
公开(公告)日：2013-12-03
申请号：US12018986
申请日：2008-01-24
申请人： Renzo Takeda , Junichi Miwa , Kumiaki Moriya
发明人： Renzo Takeda , Junichi Miwa , Kumiaki Moriya
CPC分类号： G21C1/084 , G21C3/328 , G21C5/00 , G21C2003/3262 , G21Y2002/201 , G21Y2002/304 , G21Y2002/60 , G21Y2004/10 , G21Y2004/30 , G21Y2004/403 , Y02E30/31 , Y02E30/38
摘要： A boiling water reactor has a core disposed in the reactor pressure vessel and loaded with a plurality of fuel assemblies including transuranic nuclides. A ratio of Pu-239 in all of the transuranic nuclides included in the fuel assembly, which is loaded in the core, with a burnup of 0 is 3% or more but 45% or less. In the fuel assembly having a channel box and a plurality of fuel rods disposed in the channel box, a transverse cross section of a fuel pellet in the fuel rod occupies 30% or more but 55% or less of a transverse cross section of a unit fuel rod lattice in the channel box.
摘要翻译： 沸水反应器具有设置在反应堆压力容器中并装载有多个包括超铀核素的燃料组件的核心。 包含在装载在核心中的燃料组件中的所有超铀核素中的Pu-239的比例为0，为3％以上且45％以下。 在具有通道箱和设置在通道箱中的多个燃料棒的燃料组件中，燃料棒中的燃料芯块的横截面占据单元的横截面的30％以上但是55％以下 燃料棒格在通道箱中。
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公开(公告)号：US20090196392A1
公开(公告)日：2009-08-06
申请号：US12101250
申请日：2008-04-11
申请人： Junichi MIWA , Renzo Takeda , Takeshi Mitsuyasu , Kumiaki Moriya
发明人： Junichi MIWA , Renzo Takeda , Takeshi Mitsuyasu , Kumiaki Moriya
IPC分类号： G21C3/326
摘要： A core of a boiling water reactor as a burner type core of the boiling water reactor having a ratio of 3 or more of number of fuel assemblies loaded in the core to number of control rods installed in the nuclear reactor and using an oxide of low enriched uranium having a mean enrichment of the fuel assemblies of 3 wt % to 8 wt % or a mixed oxide having a mean fissile plutonium enrichment of the fuel assemblies of 2 wt % to less than 7 wt %, wherein a ratio of an inner width of a channel box of the fuel assemblies to a width of 0.79 to 0.865, and a mean thickness of the channel box of the fuel assemblies is 2.10 to 3.55 mm.
摘要翻译： 作为沸水反应器的燃烧器型核心的沸水反应堆的核心，其中装载在核心中的燃料组件的数量与安装在核反应堆中的控制棒的数量的比例为3以上，并且使用低浓度的氧化物 具有3重量％至8重量％的燃料组件的平均富集的铀或具有2重量％至小于7重量％的燃料组件的平均易裂变钚富集的混合氧化物，其中， 燃料组件的通道箱宽度为0.79至0.865，并且燃料组件的通道箱的平均厚度为2.10至3.55mm。
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公开(公告)号：US4876062A
公开(公告)日：1989-10-24
申请号：US172418
申请日：1988-03-24
申请人： Motoo Aoyama , Yasunori Bessho , Sadao Uchikawa , Renzo Takeda , Yoshihiko Ishii
发明人： Motoo Aoyama , Yasunori Bessho , Sadao Uchikawa , Renzo Takeda , Yoshihiko Ishii
CPC分类号： G21C3/322 , G21C2003/3225 , G21Y2002/201 , G21Y2004/30 , Y02E30/38
摘要： A fuel assembly of the present invention comprises a plurality of fuel rods which are held by an upper tie plate and lower tie plate at the ends thereof and a moderating rod which is arranged between the fuel rods and held by the lower tie plate at its lower end. The fuel rods are arranged in a lattice form having 9 rows and 9 columns, and the moderating rod contains a passage for a coolant and has a cruciate cross-sectional form. The ratio A.sub.M /A.sub.C of the area A.sub.M of a moderator region in the moderating rod in the cross-sectional plane in which the moderator is present to the area A.sub.C of the coolant passages in said fuel assembly is within the range of 0.07 to 0.11, and the area A.sub.M is 75% or more of the total area of the fuel lattice units in which none of the fuel rods is arranged, but the moderating rod is arranged.
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