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公开(公告)号：US5528641A
公开(公告)日：1996-06-18
申请号：US357261
申请日：1994-12-13
CPC分类号： G21C3/322 , G21Y2002/201 , G21Y2002/304 , G21Y2004/30 , G21Y2004/302 , G21Y2004/403 , Y02E30/38
摘要： A fuel assembly is provided with a coolant ascending path for making coolant rise and a water rod having a coolant descending path for conducting the coolant.A ratio of a flow area in a coolant inlet port of the smallest in coolant ascending path 13 on the downstream side than large diameter tube portion 3E to a flow area of the largest in the axial direction of coolant ascending path 13 in large diameter tube portion 3E is set to be 0.2-20%.In the normal operation, the declination degree from the liquid level in the coolant ascending path, corresponding to the coolant flow rate of the liquid level formed in the coolant ascending path can be controlled. Further, at the time of the excess the change speed of the liquid level can also be controlled.
摘要翻译： 燃料组件设置有用于使冷却剂升起的冷却剂上升路径和具有用于导引冷却剂的冷却剂下降路径的水杆。 在大直径管部3E的下游侧的冷却剂上升路径13中的最小的冷却剂入口的流入面积与大径管部中的冷却剂上升路径13的轴向上最大的流动面积的比 3E设定为0.2〜20％。 在正常操作中，可以控制与冷却剂上升路径中形成的液面的冷却剂流量相对应的冷却剂上升路径中的液位的偏角度。 此外，在过量时，也可以控制液面的变化速度。
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公开(公告)号：US5207978A
公开(公告)日：1993-05-04
申请号：US762461
申请日：1991-09-19
申请人： Gerard Barbe
发明人： Gerard Barbe
CPC分类号： G21C7/08 , G21Y2002/101 , G21Y2004/30 , G21Y2004/302 , Y02E30/39
摘要： A device for guiding a nuclear reactor control cluster comprises guide tubes provided in the fuel assemblies, and in the upper internals, a tubular casing having an upper closure with a hole for passing the cluster drive shaft, horizontal guide plates spaced apart along the casing and cut out so as to let the spider pass and to guide the elements of the cluster, and split tubes for guiding individual elements for protecting the elements from the action of the coolant. Openings are provided immediately below the plates at the top of each internal between the guide plates. The guide tubes in a lower portion of the casing are devoid of openings other than to a slit for passage of a spider carrying the cluster.
摘要翻译： 用于引导核反应堆控制群的装置包括设置在燃料组件中的引导管，并且在上部内部中具有管状壳体，该管状壳体具有上部封闭件，该封闭件具有用于使簇驱动轴穿过的孔，水平导向板沿壳体间隔开， 切割以使得蜘蛛通过并引导簇的元件，并且分开管以引导各个元件以保护元件免受冷却剂的作用。 在引导板之间的每个内部的顶部的板的正下方提供开口。 壳体下部的引导管没有开口，除了用于携带簇的蜘蛛通过的狭缝之外。
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3.发明授权
公开(公告)号：US5100609A
公开(公告)日：1992-03-31
申请号：US615098
申请日：1990-11-19
申请人： Willem J. Oosterkamp
发明人： Willem J. Oosterkamp
摘要： The present invention discloses an improved methodology for achieving the desirable feature of recirculation flow control in a sparger-type natural-circulation BWR, enabling reactors utilzing the method to perform in load-following and/or spectral shift modes of power operations. In its broadest aspects, the invention is based on locating the feedwater sparger at an elevational level which is about water level established during normal operation of the BWR. One or more of load following or spectral shift can be performed by controlling the feedwater fed to said BWR through the feedwater inlet and into the sparger to vary the water level to be above, at or below the elevational level of such sparger.
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公开(公告)号：US4728488A
公开(公告)日：1988-03-01
申请号：US798193
申请日：1985-11-14
CPC分类号： B23K9/048 , G21C3/07 , G21Y2002/101 , G21Y2004/40 , Y02E30/40 , Y10S376/90
摘要： Slender water displacer rods for use in water reactors are provided with rings of a wear resistant coating spaced along the length of the rod. Each coating contains Cr.sub.2 C.sub.3 and is metallurgically applied and bonded to the zirconium base alloy forming the outer portion of the rod by electrospark-deposition (ESD) technique.
摘要翻译： 在水反应堆中使用的细长的水置换棒设置有沿着杆的长度间隔开的耐磨涂层的环。 每个涂层含有Cr2C3，并通过电喷溅沉积（ESD）技术冶金施加并结合到形成棒外部的锆基合金。
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公开(公告)号：US4687620A
公开(公告)日：1987-08-18
申请号：US520087
申请日：1983-08-04
CPC分类号： G21C7/27 , G21C7/117 , G21Y2002/201 , G21Y2004/302 , G21Y2004/40 , Y02E30/39
摘要： A method of operating a pressurized water nuclear reactor comprising determining the present core power and reactivity levels and predicting the change in such levels due to displacer rod movements. Groups or single clusters of displacer rods can be inserted or withdrawn based on the predicted core power and reactivity levels to change the core power level and power distribution thereby providing load follow capability, without changing control rod positions or coolant boron concentrations.
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公开(公告)号：US4681728A
公开(公告)日：1987-07-21
申请号：US715125
申请日：1985-03-22
CPC分类号： G21C7/27 , G21C7/117 , G21Y2002/204 , G21Y2004/30 , G21Y2004/304 , Y02E30/39
摘要： A nuclear reactor including, in the upper internals, a guide structure capable of effectively accommodating and guiding without binding the large number of neutron-absorber rods included in modern reactors of improved efficiency. The neutron-absorber rods include control rods, gray rods, and water-displacement rods. All rods are suspended in clusters from spiders or vanes. The upper internals of the reactor includes cruciform guides for the control-rod and gray-rod clusters. Each of these guides is composed of a plurality of vertical guide sections of transverse cruciform cross section. Plates extending throughout the cross-section of the reactor are supported between each pair of successive guide sections. The plates are perforated, the perforations in each plate being patterned to pass the water-displacement rod clusters. The plates are oriented so that the patterned perforations are aligned to serve as guides for the water-displacement rod clusters. The plates are of very large diameter and, as perforated, would not be self-supporting unless they were very thick. To overcome this drawback, each plate is formed of separate plate sections which are, when assembled nested together, like the parts of a "jig-saw puzzle".
摘要翻译： 一种核反应堆，其包括在上部内部中的能够有效地容纳和引导而不与现有反应器中包括的提高效率的大量中子吸收棒结合的引导结构。 中子吸收棒包括控制杆，灰棒和排水杆。 所有的杆从蜘蛛或叶片悬挂在群集中。 反应堆的上部内部包括用于控制棒和灰棒的十字形导轨。 这些导轨中的每一个由横向十字形截面的多个垂直导向部构成。 在整个反应器的横截面上延伸的板被支撑在每对连续的引导部分之间。 板被穿孔，每个板中的穿孔被图案化以通过水位移杆组。 板被定向成使得图案化的穿孔对齐以用作用于排水杆组的引导件。 这些板的直径非常大，并且如果穿孔，则不会自支撑，除非它们非常厚。 为了克服这个缺陷，每个板由独立的板部分组成，当组装成嵌套在一起时，就像“夹具谜题”的部件。
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公开(公告)号：US4661306A
公开(公告)日：1987-04-28
申请号：US626943
申请日：1984-07-02
申请人： Howard F. Fensterer , William E. Klassen , Luciano Veronesi , David E. Boyle , Robert B. Salton
发明人： Howard F. Fensterer , William E. Klassen , Luciano Veronesi , David E. Boyle , Robert B. Salton
CPC分类号： G21C7/27 , Y02E30/39 , Y10T137/85938
摘要： Apparatus is disclosed for introducing a low neutron moderating fluid into the reactor vessel of a spectral shift pressurized water nuclear reactor and for distributing the moderating fluid through the lower core support plate into the fuel assemblies in the core.
摘要翻译： 公开了用于将低中子调节流体引入光谱变换加压水核反应堆的反应器容器中并用于将调节流体通过下芯支撑板分配到芯中的燃料组件中的装置。
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公开(公告)号：US4575448A
公开(公告)日：1986-03-11
申请号：US357237
申请日：1982-03-11
申请人： George R. Marlatt
发明人： George R. Marlatt
摘要： A nuclear reactor system in which the neutron-energy spectrum is displaced towards lower energy (enthalpy) by a control selectively operable by commands outside of the reactor. The core of the reactor contains, in addition to fuel assemblies, sealed tubes filled with helium. The selective control of the neutron energy spectrum includes a master cylinder having a master piston. The master cylinder is immersed in the coolant and admits the coolant through a check valve. The admitted coolant serves as hydraulic fluid of the cylinder. When the external command to shift the neutron-energy spectrum is entered, the master piston compresses the coolant in the master cylinder. The compressed coolant flows into slave cylinders displacing their slave pistons. The slave pistons carry piston rods which drive rupturing tools into engagement with the tubes rupturing the tubes and admitting the coolant which is a neutron moderator and enhances the moderaton of the neutron energy.
摘要翻译： 核反应堆系统，其中中子能谱通过由反应器外部的指令有选择地操作的控制向较低能量（焓）移动。 除了燃料组件之外，反应器的核心还包含充满氦气的密封管。 中子能谱的选择性控制包括具有主活塞的主缸。 主缸浸入冷却液中，并通过止回阀使冷却液进入。 允许的冷却剂用作气缸的液压流体。 当输入转移中子能谱的外部命令时，主活塞压缩主缸中的冷却液。 压缩的冷却剂流入从动缸，使其从动活塞移位。 从动活塞带有活塞杆，其驱动破裂工具与管破裂的管接合，并允许作为中子减速器的冷却剂，并增强中子能量的中等偏差。
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公开(公告)号：US4526741A
公开(公告)日：1985-07-02
申请号：US503129
申请日：1983-06-10
申请人： William E. Cawley , Turner J. Trapp
发明人： William E. Cawley , Turner J. Trapp
摘要： A nuclear fuel assembly is described for producing tritium in a light water moderated reactor. The assembly consists of two intermeshing arrays of subassemblies. The first subassemblies comprise concentric annular elements of an outer containment tube, an annular target element, an annular fuel element, and an inner neutron spectrums shifting rod. The second subassemblies comprise an outer containment tube and an inner rod of either fuel, target, or neutron spectrum shifting neutral.
摘要翻译： 描述了用于在轻水慢化反应器中生产氚的核燃料组件。 组件由两个相互啮合的子组件阵列组成。 第一子组件包括外容纳管的同心环形元件，环形靶元件，环形燃料元件和内中子光谱变换杆。 第二子组件包括外部容纳管和燃料，靶或中子频谱偏移中性的内杆。
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