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    • 4. 发明授权
    • Fuel assembly for light water reactor and light water reactor core
    • 轻水反应堆和轻水反应堆核心的燃料组件
    • US5349619A
    • 1994-09-20
    • US64638
    • 1993-05-21
    • Takaaki MochidaMotoo Aoyama
    • Takaaki MochidaMotoo Aoyama
    • G21C3/322G21C3/328G21C3/32
    • G21C3/328G21C3/322G21C2003/3225G21Y2002/201G21Y2004/30Y02E30/38
    • A fuel assembly for a light water reactor comprising a plurality of fuel rods which contain plutonium as a primary fissile material when exposure is zero, and a light water reactor including such fuel assemblies. The fuel assembly has a structure in which at least one of moderator rods is provided at least in one of each corner portion of an arrangement of the fuel rods and a position adjacent to the corner portion in such a manner that the moderator rods are located in rotation symmetry, each of the moderator rods being filled with water or a solid coolant over a length at least corresponding to a fuel effective length, and the fuel rods are provided at positions in the second layer from the outermost periphery which are adjacent to those positions at which the moderator rods are located.
    • 一种用于轻水反应器的燃料组件,包括当暴露为零时包含钚作为主要裂变材料的多个燃料棒,以及包括这种燃料组件的轻水反应堆。 燃料组件具有这样的结构,其中至少一个减速杆设置在燃料棒的布置的每个角部的至少一个中,并且以与角部相邻的位置设置,使得调节杆位于 旋转对称,每个减速杆在至少对应于燃料有效长度的长度上填充有水或固体冷却剂,并且燃料棒设置在第二层中与最靠近这些位置的最外周的位置 调音杆位于该位置。
    • 10. 发明授权
    • Nuclear fuel assembly
    • 核燃料组件
    • US4683113A
    • 1987-07-28
    • US734604
    • 1985-05-16
    • Takaaki MochidaJunichi YamashitaToshiro YoshiokaMichihiro Ozawa
    • Takaaki MochidaJunichi YamashitaToshiro YoshiokaMichihiro Ozawa
    • G21C3/18G21C3/328G21C3/00
    • G21C3/18G21C3/328Y02E30/38
    • A nuclear fuel assembly has a plurality of fuel rods each containing a multiplicity of fuel pellets. The fuel rods include a plurality of first fuel rods and a plurality of second fuel rods. Each of the first fuel rods contains a burnable poison over substantially the entire axial length thereof. The first fuel rod also has a greater means enrichment in the upper axial region thereof than that in the lower axial region thereof. Each of the second fuel rods contains no burnable poison and has a uniform enrichment distribution over substantially the entire axial length thereof. In each cross-section of the fuel assembly perpendicular to the axis thereof, the outer peripheral portion has a greater mean enrichment than the central portion. The first fuel rods are disposed in the peripheral portion except the outermost peripheral portion of the cross-section of the fuel assembly.
    • 核燃料组件具有多个燃料棒,每个燃料棒包含多个燃料粒子。 燃料棒包括多个第一燃料棒和多个第二燃料棒。 每个第一燃料棒在其基本上的整个轴向长度上包含可燃的毒物。 第一燃料棒在其上轴向区域中具有比在其下轴向区域更大的装置富集。 每个第二燃料棒不含有可燃毒物并且在其基本上整个轴向长度上具有均匀的富集分布。 在垂直于其轴线的燃料组件的每个横截面中,外周部分具有比中心部分更大的平均富集度。 第一燃料棒设置在除了燃料组件的横截面的最外周部分之外的周边部分中。