公开(公告)号：US20120063562A1

公开(公告)日：2012-03-15

申请号：US13230439

申请日：2011-09-12

申请人： Chang Hwan SHIN ,  Kang Hee LEE ,  Dong-Seok OH ,  Wang Kee IN ,  Tae Hyun CHUN ,  Kun Woo SONG

发明人： Chang Hwan SHIN ,  Kang Hee LEE ,  Dong-Seok OH ,  Wang Kee IN ,  Tae Hyun CHUN ,  Kun Woo SONG

IPC分类号： G21C3/34

CPC分类号： G21C3/3563 ,  G21C3/322 ,  G21C3/352 ,  Y02E30/38

摘要： A dual-cooled fuel rod's spacer grid with upper and lower dimples, including a blocking area of a flow passage that coolant flows through is reduced and dual-cooled fuel rods are supported, and reduces a turbulent flow of the coolant as well as vibrations of the dual-cooled fuel rods, thereby lessening fretting damage done to the rods. The spacer grid includes a plurality of unit grid straps, each of which includes a body disposed in a vertical direction, an upper dimple protruding from an upper portion of the body, and a lower dimple spaced apart from the upper dimple in a downward direction and protruding from a lower portion of the body. The unit grid straps form a grid structure that have inner grid holes into which the dual-cooled fuel rods are held, and the held dual-cooled fuel rods are each supported in four directions by the upper and lower dimples.

摘要翻译： 双冷却燃料棒的间隔栅格具有上下凹坑，包括冷却剂流过的流动通道的阻塞区域，并且双重冷却的燃料棒被支撑，并且减少了冷却剂的湍流以及振动 双冷却燃料棒，从而减轻对棒的微小损坏。 间隔网格包括多个单位网格带，每个单元网格带包括沿垂直方向设置的主体，从主体的上部突出的上凹坑以及沿着向下方向与上凹坑间隔开的下凹坑，以及 从身体的下部突出。 单元网格带形成具有内栅格孔的栅格结构，双冷却燃料棒被保持在其中，并且保持的双重冷却燃料棒通过上下凹坑各自支撑在四个方向上。

公开(公告)号：US20100091933A1

公开(公告)日：2010-04-15

申请号：US12335952

申请日：2008-12-16

申请人： Kun Woo SONG ,  Ki Won KANG ,  Jong Hun KIM ,  Keon Sik KIM ,  Jae Ho YANG ,  Young Woo RHEE

发明人： Kun Woo SONG ,  Ki Won KANG ,  Jong Hun KIM ,  Keon Sik KIM ,  Jae Ho YANG ,  Young Woo RHEE

IPC分类号： G21C3/00

CPC分类号： G21C21/02 ,  G21C3/58 ,  G21C3/623 ,  Y02E30/38

摘要： In a method of producing large-grained nuclear fuel pellet, Cr-compound contained in an uranium oxide green pellet is reduced to Cr phase at 1,470° C. or below and maintained to the Cr phase, and the uranium oxide green pellet containing the Cr-compound is then sintered at 1,650° C.-1,800° C. in a gas atmosphere of oxygen potential at which Cr element in the uranium oxide green pellet becomes liquid phase.

摘要翻译： 在制造大粒子核燃料丸的方法中，将生成的氧化铀粒子中所含的Cr化合物在1470℃以下还原成Cr相，保持在Cr相，含有Cr的氧化铀粒子 然后将化合物在氧气电位的气体气氛中在1650℃-1,800℃下烧结，在该气体气氛中，氧化铀绿颗粒中的Cr元素变成液相。