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51.发明授权Method for the control of a boiling water reactor and a boiling water reactor for performing said method 失效沸腾水反应器的控制方法和用于实施方法的沸腾水反应器
公开(公告)号：US3766007A
公开(公告)日：1973-10-16
申请号：US3766007D
申请日：1970-03-31
申请人： INST ATOMENERGI
摘要： The invention relates to the control of a boiling water reactor in which the water circulates by natural convection in the reactor tank through the core, a riser above the core and a downcomer. By varying the water level in the downcomer, the flow rate of circulation and thereby the void fraction in the core and the reactivity are changed. The water level in the downcomer may be adjusted by transferring water to or from an auxiliary reservoir. The local circulation flow rate may be influenced by having a graded riser and by the use of nozzles.
摘要翻译： 本发明涉及沸水反应器的控制，其中水通过反应罐中的自然对流通过核心，核心上的提升管和降液管循环。 通过改变降液管中的水位，改变循环的流速，从而改变芯中的空隙率和反应性。 降液管中的水位可以通过将水转移到辅助蓄水池或从辅助蓄水池进行调节。 局部循环流速可能受到梯度立管和使用喷嘴的影响。
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公开(公告)号：US10734122B2
公开(公告)日：2020-08-04
申请号：US15282814
申请日：2016-09-30
申请人： TerraPower, LLC
发明人： Anselmo T. Cisneros, Jr. , Charles Gregory Freeman , Christopher J. Johns , Kevin Kramer , Jeffery F. Latkowski
摘要： A dynamic neutron reflector assembly for a “breed-and-burn” fast reactor incrementally adjusts neutron spectrum and reactivity in a reactor core. The composition of materials in the dynamic neutron reflector may be adjusted to change neutron reflectivity levels, or to introduce neutron moderating or absorption characteristics. The dynamic neutron reflector may contain a flowing reflecting liquid of adjustable volume and/or density. Submergible members may be selectively inserted into the flowing reflecting liquid to alter its volume and introduce other neutron modifying effects such as moderation or absorption. Selective insertion of the submergible members allows for concentration of the neutron modifying effects in a selected portion of the reactor core. The flowing reflecting liquid may also act as a secondary coolant circuit by exchanging heat with the molten fuel salt.
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公开(公告)号：US5282232A
公开(公告)日：1994-01-25
申请号：US311489
申请日：1989-02-15
CPC分类号： G21C5/02 , G21C7/08 , G21Y2002/104 , G21Y2002/303 , G21Y2004/30 , Y02E30/39
摘要： Upper internals for a nuclear reactor comprise an upper core plate and a plate which supports cluster guides tubes connecting the two plates together. The cluster guides project above the support plate. A bottom wall of the support plate is situated at a level just higher than the outlet nozzles of the reactor vessel and each guide is supported by the bottom wall of the support plate by abutment of a shoulder formed in a passage of the bottom wall, in the lower half thereof.
摘要翻译： 用于核反应堆的上部内部件包括上部芯板和支撑将两个板连接在一起的簇引导管的板。 集群指南在支撑板上方突出。 支撑板的底壁位于刚好高于反应堆容器的出口喷嘴的水平面上，并且每个引导件由支撑板的底壁通过邻接底壁的通道形成的肩部支撑， 下半部分。
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公开(公告)号：US5267286A
公开(公告)日：1993-11-30
申请号：US910846
申请日：1992-07-06
申请人： Koji Hirukawa
发明人： Koji Hirukawa
IPC分类号： G21C3/32 , G21C3/322 , G21C3/33 , G21C3/334 , G21C5/00 , G21C5/16 , G21C7/27 , G21C7/32 , G21C1/04
CPC分类号： G21C3/322 , G21C7/113 , G21C7/117 , G21C7/27 , G21Y2002/201 , G21Y2004/302 , G21Y2004/304 , Y02E30/38 , Y02E30/39
摘要： A fuel assembly having a water cross or water rod arranged between the fuel rods, an inside of the water cross or water rod being divided into a coolant rising passage and a coolant lowering passage, and a control guide tube disposed inside the water cross or water rod and extending along an axial direction of the water cross or water rod. The coolant rising passage has a coolant inlet port formed to a portion above or under a portion at which the fuel rods are supported by the lower tie plate. The control element guide tube has a coolant outlet port formed at that portion so that a coolant introduced into the coolant rising passage flows vertically upwardly, then turns and flows downwardly along the control element guide tube, and flows into an inside thereof through the coolant outlet port. A reactor core comprises a plurality of fuel assemblies each having a structure described above, a control rod and a control element operated in association with the control rod.
摘要翻译： 一种具有布置在燃料棒之间的水交叉或水杆的燃料组件，水交叉或水杆的内部被分成冷却剂升高通道和冷却剂下降通道，以及设置在水交叉或水中的控制引导管 杆并沿着水交叉或水杆的轴向延伸。 冷却剂升高通道具有形成在燃料棒由下连接板支撑的部分上方或下方的部分处的冷却剂入口。 控制元件引导管具有形成在该部分处的冷却剂出口，使得引入冷却剂升高通道的冷却剂垂直向上流动，然后沿着控制元件引导管向下流动，并通过冷却剂出口流入其内部 港口。 反应堆堆芯包括多个燃料组件，每个燃料组件均具有上述结构，一个控制棒和一个与该控制棒一起操作的控制元件。
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公开(公告)号：US5167906A
公开(公告)日：1992-12-01
申请号：US796584
申请日：1991-11-22
IPC分类号： G21C7/27
摘要： An apparatus for achieving increased fuel efficiency in a nuclear reactor wherein spectral shift is utilized to adjust for excess reactivity. This feature is achieved by stationary displacer rods within the fluid moderator of the reactor, with these stationary displacer rods decreasing ineffective volume during operation of the reactor whereby the effective volume of the fluid moderator increases as the nuclear fuel is burned. This decrease in effective volume is achieved by providing a sacrificial material in the displacer rods that is dissolved (or volatilized, etc.) by the fluid moderator. The composition of the sacrificial material can be varied along the length of the rod so as to achieve the desired reduction of volume despite a temperature gradient along the rod.
摘要翻译： 一种用于在核反应堆中实现提高的燃料效率的装置，其中利用光谱偏移来调节过量的反应性。 该特征由反应器的流体调节剂内的固定置换棒实现，这些固定置换棒在反应器操作期间减小了无效体积，由此随着核燃料燃烧，流体调节剂的有效体积增加。 有效体积的这种降低是通过在由流体调节剂溶解（或挥发等）的置换棒中提供牺牲材料来实现的。 牺牲材料的组成可以沿着杆的长度变化，以便尽管具有沿杆的温度梯度来实现所需的体积减小。
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公开(公告)号：US4832899A
公开(公告)日：1989-05-23
申请号：US884333
申请日：1986-07-11
申请人： John F. Wilson , Donald G. Sherwood
发明人： John F. Wilson , Donald G. Sherwood
CPC分类号： G21C7/27 , G21C7/117 , G21Y2002/201 , G21Y2004/10 , G21Y2004/40 , Y02E30/39
摘要： The mechanical spectral shift reactor comprises a reactive core having fuel assemblies accommodating both water displacer elements and control rods for selectively changing the volume of water-moderator in the core. The fuel assemblies are arranged in alternating fashion so that one drive mechanism may move displacer elements in more than one fuel assembly without interfering with the movement of control rods or the corresponding control rod drive mechanisms.
摘要翻译： 机械光谱变换反应器包括具有燃料组件的反应性核心，其具有容纳用于选择性地改变芯体中的水慢化剂体积的水置换元件和控制棒。 燃料组件以交替方式布置，使得一个驱动机构可以移动多于一个燃料组件中的置换器元件，而不会干扰控制杆或相应的控制杆驱动机构的移动。
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公开(公告)号：US4826648A
公开(公告)日：1989-05-02
申请号：US84348
申请日：1987-08-12
申请人： Fernand Savary
发明人： Fernand Savary
摘要： A neutron absorbing bar for use in a PWR has an integrated damping device comprising a cluster of vertical absorbent rods fixed to the arms of a spider having a central pommel connectable to a drive mechanism. A damping device in the pommel includes a cylinder slidably receiving piston urged into a downward projecting position by springs contained in the cylinder. The cylinder and the piston are so formed that the leak flow at a cross-sectional area offered to the liquid driven out of the cylinder by the piston gradually decrease as the latter moves from an outermost position. The piston carries a hydromechanical damper damping the initial impact of the bar upon a scram.
摘要翻译： 用于PWR的中子吸收杆具有集成的阻尼装置，其包括固定到具有可连接到驱动机构的中心鞍座的蜘蛛的臂的垂直吸收杆的群集。 鞍座中的阻尼装置包括可滑动地接收通过容纳在气缸中的弹簧推动到向下突出位置的活塞的气缸。 气缸和活塞被形成为使得当提供给由活塞驱动出的液体的液体的横截面积处的泄漏流随着后者从最外侧位置移动而逐渐减小。 活塞带有一个液压机械阻尼器阻尼杆的初始冲击。
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60.发明授权Pressurized water reactor having disconnectable two-piece drive rod assemblies, and related methods of assembly and maintenance operations 失效具有可拆卸的两件式驱动杆组件的加压水反应器，以及组装和维护操作的相关方法
公开(公告)号：US4778645A
公开(公告)日：1988-10-18
申请号：US806711
申请日：1985-12-09
申请人： Denis J. Altman , Theo van de Venne
发明人： Denis J. Altman , Theo van de Venne
CPC分类号： G21C19/00 , G21C19/207
摘要： Selectively and remotely disconnectable two-piece drive rod assemblies comprising elongated hub and drive rod portions interconnected by a selectively disconnectable coupling, connect rod clusters within the pressure vessel of a pressurized water reactor system to respectively corresponding drive means. The drive means are selectively operable, through the drive rod assemblies, to move the corresponding rod clusters between fully inserted positions within the lower barrel assembly of the pressure vessel, in telescoping relationship with fuel rod assemblies therein, and to a fully withdrawn position within an inner barrel assembly of the pressure vessel. The rods of each cluster are mounted to and supported by a respectively corresponding spider, in turn connected to the hub portion, the spider supporting the respective cluster on a support plate defining the lower elevation of the inner barrel assembly, in fully inserted positions of the corresponding rod clusters, and support the hubs in parallel axial relationship within the inner barrel assembly. The drive rod portions extend through the calandria and engage the couplings of the corresponding hub portions. The couplings are selectively disconnectable and, when disconnected, permit movement en masse of the calandria and drive rod portions during disassembly and assembly operations. Noninterchangeable couplings of first and second types corresponding to first and second types of rod clusters assure that incorrect couplings are not made in the assembly operations.
摘要翻译： 选择性和可远程断开的两件式驱动杆组件包括通过可选择地可拆卸的联接器互连的细长轮毂和驱动杆部分，将压水反应堆系统的压力容器内的杆组连接到分别对应的驱动装置。 驱动装置通过驱动杆组件选择性地可操作地将压缩容器的下部桶组件内的完全插入位置之间的对应的杆团移动到与其中的燃料棒组件伸缩的关系中，并且在其内的完全缩回位置 压力容器的内筒组件。 每个簇的杆被安装到分别对应的蜘蛛上并由分别对应的蜘蛛支撑，而蜘蛛又连接到轮毂部分，蜘蛛将支撑板支撑在限定内筒组件的下部高度的支撑板上，处于完全插入位置 相应的杆群，并且在内筒组件内以平行的轴向关系支撑轮毂。 驱动杆部分延伸通过卡氏管并且接合相应的轮毂部分的联接件。 联接器可选择性地断开，并且当断开连接时，在拆卸和组装操作期间允许卡鲁司特和驱动杆部分的移动。 对应于第一和第二类型的杆组的第一和第二类型的不可改变的联接器确保在组装操作中不进行不正确的联接。
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