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公开(公告)号：US5128098A
公开(公告)日：1992-07-07
申请号：US639256
申请日：1991-01-09
申请人： Shozo Nakamura , Tadashi Mizuno , Junjiro Nakajima , Yoshihiko Yanagi , Hajime Umehara , Tetsuo Yasuda , Akira Maru , Junichi Yamashita , Yuichiro Yoshimoto , Tatsuo Hayashi
发明人： Shozo Nakamura , Tadashi Mizuno , Junjiro Nakajima , Yoshihiko Yanagi , Hajime Umehara , Tetsuo Yasuda , Akira Maru , Junichi Yamashita , Yuichiro Yoshimoto , Tatsuo Hayashi
IPC分类号： G21C3/322
摘要： A fuel assembly comprises a plurality of fuel rods, a lower tie plate for supporting lower ends of the fuel rods, and a channel box surrounding a bundle of the fuel rods and the circumference of the lower tie plate to thereby define a cooling water leak passage between the lower tie plate and the channel box. The fuel assembly includes a venturi provided in the lower tie plate for generating a force tending to attract the channel box toward the lower tie plate under the action of a leak stream of the cooling water passing through the cooling water leak passage. The fuel assembly also includes an arrangement provided in the lower tie plate for suppressing vibrations of the channel box caused upon an influence of the venturi.
摘要翻译： 燃料组件包括多个燃料棒，用于支撑燃料棒的下端的下连接板，以及围绕燃料棒束和下连接板的圆周的通道箱，从而限定冷却水泄漏通道 在下连接板和通道箱之间。 燃料组件包括设置在下连接板中的文氏管，用于在通过冷却水泄漏通道的冷却水的泄漏流的作用下产生倾向于将通道箱吸引到下连接板的力。 燃料组件还包括设置在下连接板中用于抑制文丘里管的影响引起的通道箱振动的装置。
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公开(公告)号：US5640435A
公开(公告)日：1997-06-17
申请号：US214760
申请日：1994-03-18
申请人： Hideki Kurosaki , Junjiro Nakajima , Hajime Umehara , Shozo Nakamura , Satoshi Kanno , Koji Nishida , Yasunori Bessho , Masahisa Inagaki , Osamu Yokomizo , Yuichiro Yoshimoto
发明人： Hideki Kurosaki , Junjiro Nakajima , Hajime Umehara , Shozo Nakamura , Satoshi Kanno , Koji Nishida , Yasunori Bessho , Masahisa Inagaki , Osamu Yokomizo , Yuichiro Yoshimoto
CPC分类号： G21C3/328 , G21C2003/3225 , G21Y2002/201 , G21Y2002/302 , G21Y2002/401 , G21Y2004/30 , G21Y2004/40 , Y02E30/38
摘要： The lower end of each of a plurality of fuel rods is supported by a fuel supporting portion of a lower tie plate. The fuel supporting portion includes a plurality of second coolant paths for supplying a coolant from below the fuel supporting portion to a first coolant path defined above the fuel supporting portion and between the fuel rods. The total cross-sectional area of all the second coolant paths is smaller than the cross-sectional area of the first coolant path. A water rod disposed between the fuel rods each includes an ascending tube path having therein a coolant ascending path having a coolant inlet port opening to a region below the fuel supporting portion, for guiding upward the coolant supplied through the coolant inlet port, and a descending tube having therein a coolant descending path having a coolant delivery port opening to said first coolant path, for guiding downward the coolant guided by said coolant ascending path and discharging the coolant through the coolant delivery port to the first coolant path. The descending tube path is so disposed outside the ascending tube path as to define a gap, through which the coolant inside the first coolant path flows, between it and the ascending tube path.
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公开(公告)号：US5617456A
公开(公告)日：1997-04-01
申请号：US463828
申请日：1995-06-05
申请人： Hideki Kurosaki , Junjiro Nakajima , Hajime Umehara , Shozo Nakamura , Satoshi Kanno , Koji Nishida , Yasunori Bessho , Masahisa Inagaki , Osamu Yokomizo , Yuichiro Yoshimoto
发明人： Hideki Kurosaki , Junjiro Nakajima , Hajime Umehara , Shozo Nakamura , Satoshi Kanno , Koji Nishida , Yasunori Bessho , Masahisa Inagaki , Osamu Yokomizo , Yuichiro Yoshimoto
摘要： The lower end of each of a plurality of fuel rods is supported by a fuel supporting portion of a lower tie plate. The fuel supporting portion includes a plurality of second coolant paths for supplying a coolant from below the fuel supporting portion to a first coolant path defined above the fuel supporting portion and between the fuel rods. The total cross-sectional area of all the second coolant paths is smaller than the cross-sectional area of the first coolant path. A water rod disposed between the fuel rods each includes an ascending tube path having therein a coolant ascending path having a coolant inlet port opening to a region below the fuel supporting portion, for guiding upward the coolant supplied through the coolant inlet port, and a descending tube having therein a coolant descending path having a coolant delivery port opening to said first coolant path, for guiding downward the coolant guided by said coolant ascending path and discharging the coolant through the coolant delivery port to the first coolant path. The descending tube path is so disposed outside the ascending tube path as to define a gap, through which the coolant inside the first coolant path flows, between it and the ascending tube path.
摘要翻译： 多个燃料棒的每一个的下端由下连接板的燃料支撑部支撑。 燃料支撑部分包括多个第二冷却剂路径，用于将冷却剂从燃料支撑部分下方供应到限定在燃料支撑部分上方和燃料棒之间的第一冷却剂路径。 所有第二冷却剂通道的总截面积小于第一冷却剂通道的横截面面积。 设置在燃料棒之间的水杆各自包括上升管路，其中具有冷却剂上升路径，其具有通向燃料支撑部分下方的区域的冷却剂入口，用于向上引导通过冷却剂入口提供的冷却剂， 其中具有冷却剂下降路径，其具有通向所述第一冷却剂路径的冷却剂输送口，用于向下引导由所述冷却剂上升路径引导的冷却剂并将冷却剂通过冷却剂输送端口排出到第一冷却剂路径。 下降的管道设置在上升管道的外侧，以便限定第一冷却剂路径内的冷却剂在其与上升的管道之间流动的间隙。
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公开(公告)号：US5265139A
公开(公告)日：1993-11-23
申请号：US840939
申请日：1992-02-25
申请人： Yoshihiko Yanagi , Junjiro Nakajima , Kenji Kanamori , Hajime Umehara , Yasuhiro Aizawa , Toraki Sakuma , Hiromasa Hirakawa , Hideaki Ishizaki
发明人： Yoshihiko Yanagi , Junjiro Nakajima , Kenji Kanamori , Hajime Umehara , Yasuhiro Aizawa , Toraki Sakuma , Hiromasa Hirakawa , Hideaki Ishizaki
CPC分类号： G21C3/324 , G21Y2002/201 , G21Y2002/303 , G21Y2004/30 , Y02E30/40
摘要： A fuel assembly comprises a plurality of fuel rods supported by an upper tie plate and a lower tie plate respectively at each of upper end portion ad lower end portion, and a channel box surrounding a bundle of the fuel rods and the lower tie plate. The fuel assembly forms a natural uranium region at lower end portion of effective fuel length portion. A wall thickness at a lower thick wall region of the channel box is thicker than the wall thickness at a region disposed upwardly from the lower thick wall region and between corner portions of the channel box. An upper end of the lower thick wall region is disposed from an upper side of the lower tie plate and downwardly from an upper end of the natural uranium region. A wall thickness at the corner portion of the channel box is thicker than the wall thickness at a middle portion of the side wall between the corner positions at the region locating upward from the lower thick wall region. The fuel assembly is able to reduce stresses caused in the channel box during an earthquake, and, is able to improve fuel economy.
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公开(公告)号：US4985199A
公开(公告)日：1991-01-15
申请号：US250111
申请日：1988-09-28
申请人： Makoto Irube , Junjiro Nakajima , Hajime Umehara , Nobuo Tada , Masayoshi Ajima
发明人： Makoto Irube , Junjiro Nakajima , Hajime Umehara , Nobuo Tada , Masayoshi Ajima
摘要： Each of cylindrical members composing a fuel spacer of separate cell type is formed at a edge portion thereof with a positioning notch or a positioning projection, which is located just opposite to one of fuel rod supporting projections formed on the inner surface of the cylindrical member. In manufacturing of the fuel spacer, the positioning notches or projections of the cylindrical members are engaged with the positioning projections or recesses formed on fuel spacer assembly jigs for precise and easy positioning of cylindrical members.
摘要翻译： 构成分离单元型燃料间隔件的圆柱形构件的边缘部分形成有定位凹口或定位凸起，该定位凹口位于与形成在圆柱形构件的内表面上的燃料棒支撑突起之一正好相对的位置。 在燃料间隔件的制造中，圆柱形构件的定位凹口或凸起与形成在燃料间隔件组件夹具上的定位凸起或凹槽接合，以便精确和容易地定位圆柱形构件。
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公开(公告)号：US4766658A
公开(公告)日：1988-08-30
申请号：US884895
申请日：1986-07-14
CPC分类号： G21C3/07 , C22B34/14 , C22B9/228 , G21Y2002/103 , G21Y2002/201 , G21Y2002/206 , G21Y2004/40 , Y02E30/40 , Y10T29/49929 , Y10T29/49988 , Y10T29/49991
摘要： A method of producing a composite nuclear fuel cladding lined with a liner of high purity zirconium characterized in that a raw material of zirconium sponge disposed in a hearth cavity is irradiated with an electron beam while controlling an amount of heat per unit volume (w.sec/mm.sup.3) according to an oxygen removal rate of the raw material determined by oxygen concentration of the raw material and a target oxygen concentration of an ingot for a liner to be refined, and zircaloy cladding is lined with the liner. The hearth cavity has a preferable shape in which the ratio of the cavity surface to the cavity volume is 0.20 mm.sup.-1 or larger.
摘要翻译： 一种生产具有高纯度锆衬的复合核燃料包覆层的方法，其特征在于，在控制每单位体积的热量（w·sec）的同时，照射设置在炉床腔中的锆海绵原料 / mm 3），根据由原料的氧浓度确定的原料的氧除去率和待精制衬管的锭的目标氧浓度，并且将锆石覆层与衬垫衬里。 炉膛腔具有其中空腔表面与空腔体积的比率为0.20mm-1或更大的优选形状。
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公开(公告)号：US4678521A
公开(公告)日：1987-07-07
申请号：US837557
申请日：1986-03-03
申请人： Toshimi Yoshida , Hideo Maki , Hajime Umehara , Tetsuo Yasuda , Isao Masaoka , Iwao Takase , Masahisa Inagaki , Ryutarou Jimbow , Keiichi Kuniya
发明人： Toshimi Yoshida , Hideo Maki , Hajime Umehara , Tetsuo Yasuda , Isao Masaoka , Iwao Takase , Masahisa Inagaki , Ryutarou Jimbow , Keiichi Kuniya
CPC分类号： C22F1/186 , Y10S376/90
摘要： In a process for producing a zirconium-based alloy in which after the zirconium-based alloy is subjected to hot plastic working, it is subjected to cold plastic working and then to annealing and these steps are repeated at least twice, the present invention provides a process for producing a zirconium-based alloy characterized in that after the alloy is subjected to solid solution treatment in which it is heated to a temperature within the range including the .alpha. phase and the .beta. phase of the alloy, or within the range of the .beta. phase and is then quenched, cold plastic working is effected at least twice.
摘要翻译： 在锆系合金的制造方法中，在对锆系合金进行热塑性加工后，对其进行冷塑性加工，然后进行退火，将这些工序重复至少2次，本发明提供 锆系合金的制造方法，其特征在于，在将合金进行固溶处理后，将其加热至包含合金的α相和β相的范围内的温度，或者在β 然后淬火，冷塑性加工至少进行两次。
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公开(公告)号：US4842814A
公开(公告)日：1989-06-27
申请号：US9477
申请日：1987-02-02
申请人： Iwao Takase , Masahisa Inagaki , Masayoshi Kanno , Toshimi Yoshida , Jiro Kuniya , Isao Masaoka , Tetsuo Yasuda , Hajime Umehara , Hideo Maki
发明人： Iwao Takase , Masahisa Inagaki , Masayoshi Kanno , Toshimi Yoshida , Jiro Kuniya , Isao Masaoka , Tetsuo Yasuda , Hajime Umehara , Hideo Maki
摘要： A channel box and/or a spacer of a fuel assembly is a welded construction and made of a Zr-Nb-Sn alloy comprising 0.5-2.2 wt % Nb, 0.5-1.5 wt % Sn contained so as to satisfy the relation of Sn(wt %) 22.times.Nb(wt %)--3.0, and balance Zr or a Zr-Nb-Sn-Mo alloy comprising 0.5-2.2 wt % Nb, 0.5-1.5 wt % Sn contained so as to satisfy the relation of Sn(wt %).gtoreq.2.times.Nb(wt %)--0.3, 0.1-0.8 wt % Mo, and balance Zr. The welded portion, its heat affected zone and the unwelded portion of the channel box and/or the spacer have substantially the whole equilibrium phase structure.
摘要翻译： 燃料组件的通道箱和/或间隔件是焊接结构，由包含0.5-2.2重量％Nb，0.5-1.5重量％Sn的Zr-Nb-Sn合金制成，以满足Sn（ 重量％）22×Nb（重量％）-3.0，余量包含0.5-2.2重量％Nb，0.5-1.5重量％Sn的Zr或Zr-Nb-Sn-Mo合金，以满足Sn（wt％）的关系， ）> / = 2xNb（wt％）-0.3,0.1-0.8wt％Mo，余量为Zr。 焊接部分，其热影响区和通道箱和/或间隔件的未焊接部分具有基本上全部的平衡相结构。
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公开(公告)号：US4689091A
公开(公告)日：1987-08-25
申请号：US704208
申请日：1985-02-22
申请人： Toshimi Yoshida , Hideo Maki , Hajime Umehara , Tetsuo Yasuda , Isao Masaoka , Iwao Takase , Masahisa Inagaki , Ryutarou Jimbow , Keiichi Kuniya
发明人： Toshimi Yoshida , Hideo Maki , Hajime Umehara , Tetsuo Yasuda , Isao Masaoka , Iwao Takase , Masahisa Inagaki , Ryutarou Jimbow , Keiichi Kuniya
CPC分类号： C22F1/186 , Y10S376/90
摘要： In a process for producing a zirconium-based alloy in which after the zirconium-based alloy is subjected to hot plastic working, it is subjected to cold plastic working and then to annealing and these steps are repeated at least twice, the present invention provides a process for producing a zirconium-based alloy characterized in that after the alloy is subjected to solid solution treatment in which it is heated to a temperature within the range including the .alpha. phase and the .beta. phase of the alloy, or within the range of the .beta. phase and is then quenched, cold plastic working is effected at least twice.
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公开(公告)号：US5388132A
公开(公告)日：1995-02-07
申请号：US121898
申请日：1993-09-16
申请人： Motoo Aoyama , Yasunori Bessho , Junichi Yamashita , Katsumasa Haikawa , Hajime Umehara , Osamu Yokomizo , Hideo Soneda , Mitsunari Nakamura
发明人： Motoo Aoyama , Yasunori Bessho , Junichi Yamashita , Katsumasa Haikawa , Hajime Umehara , Osamu Yokomizo , Hideo Soneda , Mitsunari Nakamura
CPC分类号： G21C3/328 , G21Y2002/201 , G21Y2004/10 , G21Y2004/30 , Y02E30/31 , Y02E30/38
摘要： A mean uranium enrichment of fuel rods is set to not less than 4 wt% and preferably 4.25%, a percentage in number of Gd rods to all the fuel rods is set in the range of 20 to 30% and preferably 23%, and an enrichment 4.45 wt% of the Gd rods is between a pellet maximum uranium enrichment and a pellet minimum uranium enrichment. A percentage in number of those fuel rods having a maximum uranium enrichment of 5.0% to all the fuel rods except the Gd rods is set to not less than 75% and preferably 82%. A mean uranium enrichment in the enriched fuel section except blanket regions at upper and lower end portions is 4.75 wt% and a ratio e.sub.max /e.sub.mean of the pellet maximum uranium enrichment to that mean uranium enrichment is not larger than 1.16 and preferably 1.105. Accordingly, when the maximum uranium enrichment is limited to 5.0 wt%, the mean uranium enrichment can be raised to attain mean discharged exposure not less than 45 GWd/t without causing any problems in gadolinia containing fuel rods.
摘要翻译： 将燃料棒的平均铀浓缩设定为不低于4重量％，优选为4.25％，将所有燃料棒的Gd棒的数量设定在20〜30％，优选为23％的范围内， 富集4.45重量％的Gd棒是在颗粒最大铀浓缩和沉淀最小铀浓缩之间。 对除了Gd棒以外的所有燃料棒，具有5.0％的最大铀浓缩的燃料棒的数量的百分比设定为75％以上，优选为82％。 富集燃料部分的平均铀浓缩除上下部分的覆盖区域为4.75重量％，并且颗粒最大铀浓缩与该平均铀浓缩物的比例emax / emean不大于1.16，优选为1.105。 因此，当最大铀浓缩限制为5.0重量％时，可以提高平均铀浓缩以达到不低于45GWd / t的平均排放暴露，而不会在含钆燃料棒中引起任何问题。
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