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    • 41. 发明授权
    • Method of operating a nuclear reactor which maintains a substantially
constant axial power distribution profile with changes in load
    • 操作核反应堆的方法,其保持具有负载变化的基本上恒定的轴向功率分布曲线
    • US4057463A
    • 1977-11-08
    • US501569
    • 1974-08-29
    • Toshio Morita
    • Toshio Morita
    • G21C7/00G21D3/16G21C7/08
    • G21D3/16Y02E30/40
    • This invention provides a method of operating a nuclear reactor with the object of maintaining a substantially symmetric axial xenon distribution during normal power operation including load follow. Variations in the xenon distribution are controlled by maintaining a substantially symmetric axial power distribution. Procedures are described for maintaining the axial offset value of the core, as an indicia of the axial power distribution, substantially equal to a target value, which is modified periodically to account for core burnup. In one embodiment a neutron absorbing element within the core coolant, or moderator, is employed to assist control of reactivity changes associated with changes in power with the full length control rods mainly employed to adjust variations in the axial power distribution, while the part length rods remain completely withdrawn from the fuel region of the core. In a second embodiment reactivity changes associated with changes in power are controlled by the full length rods, while the part length rods are used to adjust the axial power distribution and the neutron absorbing element within the core coolant or moderator is used to compensate for xenon buildup or depletion.
    • 本发明提供了一种操作核反应堆的方法,其目的是在正常功率操作期间保持基本对称的轴向氙分布,包括负载跟随。 通过保持基本对称的轴向功率分布来控制氙分布的变化。 描述了用于维持芯的轴向偏移值作为轴向功率分布的标记的程序,基本上等于目标值,该目标值被周期性地修改以考虑到核心燃尽。 在一个实施例中,使用核心冷却剂或调节剂内的中子吸收元件来协助控制与主要用于调节轴向功率分布变化的全长控制棒相关联的功率变化的反应性变化,而部件长度棒 保持完全从核心的燃料区域撤出。 在第二实施例中,与功率变化相关的反应性变化由全长杆控制,而部分长度杆用于调节轴向功率分布,并且核心冷却剂或调节剂中的中子吸收元件用于补偿氙积累 或耗尽。
    • 42. 发明授权
    • Method for analysis of pellet-cladding interaction
    • 颗粒 - 包层相互作用分析方法
    • US08149983B2
    • 2012-04-03
    • US11447357
    • 2006-06-06
    • Charles L. Beard, Jr.Toshio MoritaR. Wade Miller
    • Charles L. Beard, Jr.Toshio MoritaR. Wade Miller
    • G21C9/00
    • G21C17/00G21C2003/047G21D3/001G21Y2002/202G21Y2004/40Y02E30/39
    • A method is provided for evaluating pellet-cladding interaction (PCI) in a nuclear core having a reactor protection system and a plurality of elongated fuel rods each having fuel surrounded by cladding with a gap therebetween. The method includes: selecting a number of core parameters to be analyzed; evaluating the selected parameters at a plurality of statepoints; generating a model of an operating space of the core based, at least in part, upon the statepoints; selecting a subset or loci of statepoints from the model wherein each of the statepoints of the loci of statepoints, when subjected to a predetermined transient, falls within the operational limits of the reactor protection system; and evaluating the loci of statepoints for PCI in response to the transient. In this manner, the potential for PCI can be accurately determined without requiring every statepoint for every fuel rod in the core to be individually analyzed.
    • 提供了一种用于评估具有反应器保护系统的核芯中的颗粒 - 包层相互作用(PCI)的方法,以及多个细长燃料棒,每个细长的燃料棒具有围绕其间具有间隙的包层。 该方法包括:选择要分析的多个核心参数; 在多个状态点评估所选择的参数; 至少部分地基于状态点生成核心的操作空间的模型; 从模型中选择状态点的子集或轨迹,其中当受到预定瞬变时,状态点的轨迹中的每个状态点落入反应堆保护系统的操作限度内; 并针对短暂性评估评估PCI的状态点位置。 以这种方式,可以准确地确定PCI的潜力,而不需要对芯中的每个燃料棒进行单独分析的每个状态点。
    • 45. 发明授权
    • Method for producing vapor grown carbon fiber
    • 生产气相生长碳纤维的方法
    • US07524479B2
    • 2009-04-28
    • US10475777
    • 2002-06-26
    • Kazuo MuramakiYoshihisa SakamotoRyuji YamamotoToshio Morita
    • Kazuo MuramakiYoshihisa SakamotoRyuji YamamotoToshio Morita
    • D01F9/12
    • B82Y30/00D01F9/127D01F9/133
    • A method for producing vapor grown carbon, including mixing a raw material gas containing an organic compound and an organo-transition metallic compound preliminarily heated preferably to a temperature of 100 to 450° C. with a carrier gas heated preferably to a temperature of 700 to 1,600° C., and introducing the resultant gas mixture into a carbon fiber production zone, wherein preferably a mixture of an aromatic compound and acetylene, ethylene, or butadiene is used as an organic compound. The method can include dissolving the transition metallic compound in a solvent, atomizing the resultant solution into fine droplets, evaporating the solvent in the droplets to thereby obtain fine particles of the transition metal compound, and introducing the drifting particles with an organic compound gas into the carbon fiber production zone. Vapor grown carbon fiber is thereby produced.
    • 一种生产气相生长碳的方法,包括将预先加热至100至450℃的预先加热的有机化合物的原料气体和有机过渡金属化合物与优选加热至700℃的载气混合, 1600℃,将所得气体混合物引入碳纤维生产区,其中优选使用芳香族化合物和乙炔,乙烯或丁二烯的混合物作为有机化合物。 该方法可以包括将过渡金属化合物溶解在溶剂中,将所得溶液雾化成微小液滴,蒸发液滴中的溶剂,从而获得过渡金属化合物的细颗粒,并将漂移颗粒与有机化合物气体引入 碳纤维生产区。 由此生成气相生长的碳纤维。