-
1.发明授权Lower tie plate strainers including double corrugated strainers for boiling water reactors 失效下层连接板过滤器，包括用于沸水反应堆的双波纹过滤器
公开(公告)号：US5483564A
公开(公告)日：1996-01-09
申请号：US196738
申请日：1994-02-15
申请人： Bruce Matzner , Eric B. Johansson , Richard A. Wolters, Jr. , Thomas G. Dunlap , Robert B. Elkins , Harold B. King , Paul W. Sick , Kevin L. Ledford
发明人： Bruce Matzner , Eric B. Johansson , Richard A. Wolters, Jr. , Thomas G. Dunlap , Robert B. Elkins , Harold B. King , Paul W. Sick , Kevin L. Ledford
CPC分类号： G21C3/3206 , G21C1/086 , G21Y2002/104 , G21Y2002/201 , G21Y2004/30 , G21Y2004/302 , G21Y2004/303 , Y02E30/40
摘要： In a boiling water reactor fuel bundle, a three dimensional debris catching grid construction is placed within the flow volume defined by the lower tie plate assembly between the inlet nozzle and upper fuel rod supporting grid. A perforated plate is utilized having round holes as small consistent with the prevention of inadvertent closure due crudding and a hole pitch consistent with mechanical integrity requirements. The perforated plate is placed in a three dimensional construction such as a dome, cylinder, pyramid, inverted pyramid or corrugated construction spanning the flow volume of the lower tie plate assembly. As a consequence of this three dimensional grid construction, the total flow through area of the perforations in the metal plate does not introduce appreciable pressure drop in the lower tie plate assembly between the inlet nozzle and the rod supporting grid. Fluid movement at the debris restraining holes of the grid construction has a low flow velocity and a change in flow direction before passing through the holes to discourage debris from finding its way through the grid holes. Finally, it is possible to incorporate debris traps within the flow volume of the lower tie plate assembly that can cause trapping and subsequent removal of trapped debris upon fuel bundle replacement. A double corrugated plate having large holes in the lower plate and smaller holes in the upper plate is utilized to trap debris.
摘要翻译： 在沸水反应堆燃料束中，三维碎屑捕获栅格结构放置在由入口喷嘴和上燃料棒支撑栅之间的下连接板组件限定的流动体积内。 使用多孔板，其圆形孔小，防止由于粗糙度而导致的无意闭合，以及与机械完整性要求一致的孔间距。 多孔板被放置在三维结构中，例如圆顶，圆柱体，金字塔，倒金字塔或波纹结构，跨越下拉板组件的流动体积。 作为这种三维格栅结构的结果，金属板中的穿孔面积的总流量不会在入口喷嘴和支撑杆之间的下连接板组件中引入明显的压降。 格栅结构的碎屑限制孔处的流体运动在通过孔之前具有低流速和流动方向的变化，以阻止碎屑通过栅格孔。 最后，可以将碎屑收集器结合在下连接板组件的流动体积内，这可以导致在燃料束更换时捕获和随后的捕获的碎屑的去除。 在下板中具有大孔的双层波纹板和上板中的较小孔用于捕集碎屑。
-
2.发明授权Core loading strategy for reload of a plurality of different fuel bundle fuel designs 失效用于重新加载多个不同燃料束燃料设计的核心加载策略
公开(公告)号：US5272736A
公开(公告)日：1993-12-21
申请号：US971643
申请日：1992-11-05
CPC分类号： G21C5/02 , G21Y2002/201 , G21Y2004/403 , Y02E30/40
摘要： In combination with a boiling water nuclear reactor core undergoing a reload, an improved core reload and process of reloading is disclosed. The core reload consists of fuel bundles having differing design margins to critical power and linear heat generation rate. Specifically, a first part of the core reload is selected from fuel bundles having relatively high critical power margin and relatively lower linear heat generation margin. A second part of the core reload is selected from fuel bundles having relatively high linear heat generation margin and relatively low critical power margin. Distribution of the reload fuel bundles throughout the reactor core occurs as a function of critical power margin and linear heat generation rate margin. Specifically, fuel bundles having the high critical power margin are placed in selected intervals to the central portion of the cylindrical core. Fuel bundles having high linear heat generation margin are placed in the peripheral region of the core. Preferably and on a diameter basis, the middle third of the core is interspersed with fuel bundle loading including the high critical power margin fuel bundles. The outer third of the core is interspersed with fuel bundle loading including the high linear heat generation rate margin. There results an overall core loading having overall power exceeding that power attainable by the prior art practice of utilizing one margin design uniformly distributed throughout the core.
-
公开(公告)号：US4767595A
公开(公告)日：1988-08-30
申请号：US49897
申请日：1987-05-15
CPC分类号： G21C7/00 , G21C3/324 , G21C5/02 , G21C3/334 , G21Y2002/201 , G21Y2004/30 , G21Y2004/40 , Y02E30/31 , Y02E30/39
摘要： In a boiling water reactor (BWR) of the D-lattice type an improved apparatus and method for the mounting of a nuclear fuel assembly is disclosed. Specifically, a D-lattice nuclear fuel assembly is diagonally displaced at the top and diagonally displaced at the bottom to and toward the cruciform shaped control rod interstices. Displacement at the bottom end of the nuclear fuel assembly occurs by an eccentrically centered lower tie plate and fluid inlet for fitting to the core plate at the bottom end of the assembly. Displacement at the top end of the nuclear fuel assembly occurs by shims in the vicinity of the upper end of the channel at the top guides. The disclosed channel assembly is capable of installation during refueling cycles, with a displaced channel being substituted for prior art conventional D-lattice channels. Substitution of one displaced channel occurs with each refueling cycle in a group of four channels. Consequently, there results at the end a maximum of four refueling cycles, complete installation of the displaced channels. As substitution occurs, there results an improved worth of each fuel channel assembly enabling an eventual aggregate 2% increase in life with resultant savings.
摘要翻译： 公开了一种用于安装核燃料组件的改进的装置和方法，在D-晶格型沸水反应器（BWR）中。 具体地说，D格子核燃料组件在顶部是斜对位移的，并且在底部向对角线位移并且朝向十字形控制棒间隙。 在核燃料组件的底端的位移由偏心中心的下连接板和流体入口发生，用于在组件的底端装配到芯板。 在核燃料组件的顶端的位移通过在顶部引导件处的通道的上端附近的垫片发生。 所公开的通道组件能够在加油循环期间安装，其中替换通道代替现有技术的常规D-晶格通道。 在一组四个通道中的每个加油循环中，替换一个位移通道。 因此，最终导致最多四个加油循环，完全安装排水通道。 随着替代发生，每个燃料通道组件的价值得到改善，从而最终总体上增加了2％的增长，从而节约了成本。
-
公开(公告)号：US4357298A
公开(公告)日：1982-11-02
申请号：US195877
申请日：1980-10-10
CPC分类号： G21C3/3566 , Y02E30/40
摘要： Advantage is taken of the non-uniform axial neutron flux density distribution in a nuclear reactor core by using fuel rod spacers of low neutron absorption in high neutron flux density regions and fuel rod spacers of low coolant flow resistance in the lower neutron flux density regions of the core, this spacer combination also providing higher fuel bundle thermal limits.
摘要翻译： 通过在高中子通量密度区域中使用低中子吸收的燃料棒间隔物和较低的中子通量密度区域中的低冷却剂流动阻力的燃料棒间隔物，在核反应堆堆芯中采用非均匀轴向中子通量密度分布的优点 核心，这种间隔组合也提供更高的燃料束热限制。
-
公开(公告)号：US5384814A
公开(公告)日：1995-01-24
申请号：US44687
申请日：1993-04-12
申请人： Bruce Matzner , Eric B. Johansson , Richard A. Wolters, Jr. , Thomas G. Dunlap , Robert B. Elkins , Harold B. King , Paul W. Sick
发明人： Bruce Matzner , Eric B. Johansson , Richard A. Wolters, Jr. , Thomas G. Dunlap , Robert B. Elkins , Harold B. King , Paul W. Sick
CPC分类号： G21C3/3206 , G21C1/086 , G21Y2002/104 , G21Y2002/201 , G21Y2004/30 , G21Y2004/302 , G21Y2004/303 , Y02E30/40
摘要： In a boiling water reactor fuel bundle, a three dimensional debris catching grid construction is placed within the flow volume defined by the lower tie plate assembly between the inlet nozzle and upper fuel rod supporting grid. A perforated plate is utilized having round holes as small consistent with the prevention of inadvertent closure due crudding and a hole pitch consistent with mechanical integrity requirements. The perforated plate is placed in a three dimensional construction such as a dome, cylinder, pyramid, inverted pyramid or corrugated construction spanning the flow volume of the lower tie plate assembly. As a consequence of this three dimensional grid construction, the total flow through area of the perforations in the metal plate does not introduce appreciable pressure drop in the lower tie plate assembly between the inlet nozzle and the rod supporting grid. Fluid movement at the debris restraining holes of the grid construction has a low flow velocity and a change in flow direction before passing through the holes to discourage debris from finding its way through the grid holes. Finally, it is possible to incorporate debris traps within the flow volume of the lower tie plate assembly that can cause trapping and subsequent removal of trapped debris upon fuel bundle replacement.
摘要翻译： 在沸水反应堆燃料束中，三维碎屑捕获栅格结构放置在由入口喷嘴和上燃料棒支撑栅之间的下连接板组件限定的流动体积内。 使用多孔板，其圆形孔小，防止由于粗糙度而导致的无意闭合，以及与机械完整性要求一致的孔间距。 多孔板被放置在三维结构中，例如圆顶，圆柱体，金字塔，倒金字塔或波纹结构，跨越下拉板组件的流动体积。 作为这种三维格栅结构的结果，金属板中的穿孔面积的总流量不会在入口喷嘴和支撑杆之间的下连接板组件中引入明显的压降。 格栅结构的碎屑限制孔处的流体运动在通过孔之前具有低流速和流动方向的变化，以阻止碎屑通过栅格孔。 最后，可以将碎屑收集器结合在下连接板组件的流动体积内，这可以导致在燃料束更换时捕获和随后的捕获的碎屑的去除。
-
公开(公告)号：US5229068A
公开(公告)日：1993-07-20
申请号：US914389
申请日：1992-07-15
CPC分类号： G21C3/322 , G21C15/16 , G21Y2002/201 , G21Y2004/30 , G21Y2004/302 , Y02E30/38
摘要： In a fuel bundle for use in the core of a boiling water nuclear reactor, part length rods having a tendency to reduce pressure drop are used in combination with spacers and spacer attached devices tending to restore pressure drop to improve critical power. The addition of the part length rods has the advantage of lowering the pressure drop. Attached devices substantially recapture the pressure drop. Exemplary spacer attached mechanisms for the recapture of pressure drop are set forth including vanes--preferably swirl vanes on the spacers, decreasing the spacer pitch to increase the total number of spacers in the upper two phase region of the fuel bundle, increasing the vertical height of the spacers, and increasing the thickness of the metal from which the spacers are constructed. Two classes of separation devices are disclosed for placement in the volume overlying the end of the partial length fuel rods. A first type of device fits to the end of the part length rods and is primarily intended for preventing water passing along the surface of the part length rod adjacent the end of the part length rod from entering the volume overlying the part length fuel rod. A second type of device resides in the volume overlying the part length rod. In either case, critical power is improved.
摘要翻译： 在用于沸水核反应堆核心的燃料束中，与间隔物和间隔物连接的装置结合使用倾向于恢复压力降低以提高临界功率的部分长度的棒。 部分长度杆的添加具有降低压降的优点。 连接的装置基本上重新吸收压降。 示出了用于重新获得压降的示例性间隔件附接机构，其包括叶片 - 优选间隔件上的旋转叶片，减小间隔物间距以增加燃料束的上两相区域中的间隔物的总数，增加垂直高度 间隔物，并且增加构成间隔物的金属的厚度。 公开了两类分离装置用于放置在覆盖部分长度燃料棒的端部的体积中。 第一类型的装置适合于部件长度杆的端部，并且主要用于防止沿邻近零件长度杆的端部的部分长度杆的表面的水进入超过部件长度燃料棒的体积。 第二种类型的设备驻留在覆盖部件长度杆的体积中。 在任一情况下，临界功率都得到改善。
-
公开(公告)号：US5615240A
公开(公告)日：1997-03-25
申请号：US330824
申请日：1994-10-27
申请人： Richard A. Wolters, Jr. , James E. Boyden , Donald K. George , Donald K. Henrie , Robert H. Jones , Michael G. McBride
发明人： Richard A. Wolters, Jr. , James E. Boyden , Donald K. George , Donald K. Henrie , Robert H. Jones , Michael G. McBride
CPC分类号： G21F5/012 , G21Y2002/303 , G21Y2004/301
摘要： In a nuclear reactor fuel bundle packaging apparatus including a hollow cylindrical cask (22) and a basket liner assembly (23) receivable within the cask, the basket liner assembly including a plurality of laterally spaced disks (26) rigidly held by a plurality of tie rods (28), and a plurality of elongated hollow basket liners (33) extending through and fixed to the plurality of disks, each hollow basket liner (33) holding a nuclear fuel bundle assembly (10) having an upper tie plate (14), a lower tie plate (16) and a plurality of fuel rods (12) arranged in a substantially square array, extending between the upper and lower tie plates, the improvement comprising an oversized hollow fuel bundle channel (68) received over the fuel bundle assembly, the channel (68) having the same cross sectional shape as the basket liner (33) but sized to fit within the basket liner, the basket liner having at least one slot (74) formed in at least one side thereof at each disk, and at least one spring (72) mounted on the basket liner (33) spanning the slot (74) with one surface of the spring engaging the disk (26) and another surface of the spring engaging an adjacent surface of the oversized hollow fuel bundle channel (68).
摘要翻译： 在包括可容纳在所述桶内的中空圆筒形容器（22）和篮子衬套组件（23）的核反应堆燃料束包装设备中，所述篮子衬套组件包括多个横向间隔开的盘（26） 杆（28）和延伸穿过并固定到多个盘的多个细长的中空篮筐（33），每个中空篮筐（33）保持具有上连接板（14）的核燃料束组件（10） ，下连接板（16）和布置成基本上正方形阵列的多个燃料棒（12），其在上和下连接板之间延伸，改进包括容纳在燃料束上的过大的中空燃料束通道（68） 所述通道（68）具有与所述篮子衬套（33）相同的横截面形状，但尺寸适于装配在所述篮子衬套内，所述篮子衬垫具有至少一个狭槽（74），所述至少一个狭槽（74）在每个盘的至少一侧形成 ，和至少一个弹簧 （72），其安装在横跨所述槽（74）的所述篮衬（33）上，所述弹簧的一个表面与所述盘（26）接合，并且所述弹簧的另一表面与所述超尺寸的中空燃料束通道（68）的相邻表面接合。
-
-
-
-
-
-
搜索结果
7 条记录 (耗时 0.02 秒)
