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    • 1. 发明授权
    • High voltage, high current fuse with combustion assisted operation
    • 高电压,高电流保险丝,辅助燃烧辅助操作
    • US4489301A
    • 1984-12-18
    • US472556
    • 1983-03-07
    • Peter D. JohnsonWillard T. Grubb
    • Peter D. JohnsonWillard T. Grubb
    • H01H85/055H01H37/76
    • H01H85/055
    • A high voltage fuse comprises one or more fusible strips or wires (fusible elements) electrically connected between nonfusible external electrical connection means with at least one portion of the fusible element ("a rapid melting portion") being designed to melt open when the current exceeds a given value for a given period of time. The fuse further comprises exothermic material, disposed on electrically-conductive wire, which is placed adjacent to portions of the fusible element. Electric circuit connection means connect the electrically-conductive wire to electrically opposite sides of the rapid melting portion. The electrical circuit connection means provides for either parallel or series connection of the wire surrounded by the exothermic material. In operation, during the passage of a sufficiently high current, an arc develops in the immediate vicinity of the rapid melting portions and the voltage drop occurring across this arc supplies power to the electrically-conductive wire which ignites the exothermic material so as to either blast or melt away specific remaining portions of the fuse. As a result, a plurality of series connected arcs are formed so that the sum of the voltages across the arcs increases to a level sufficient to bring the current through the fuse to a zero value in a short time.
    • 高压熔断器包括一个或多个可熔接的条或电线(可熔元件),其电连接在不可熔的外部电连接装置与至少一部分易熔元件(“快速熔化部分”)之间,其设计成当电流超过 给定时间的给定值。 保险丝还包括设置在导电线上的放热材料,其放置成与易熔元件的部分相邻。 电路连接装置将导电线连接到快速熔化部分的电气相对侧。 电路连接装置提供由放热材料包围的线的并联或串联连接。 在操作中,在足够高的电流通过期间,电弧在快速熔化部分的紧邻附近发生,并且跨该电弧发生的电压降向引导放电材料的导电线供电,以便喷射 或熔化保险丝的特定剩余部分。 结果,形成多个串联连接的电弧,使得跨过电弧的电压之和增加到足以使电流在短时间内通过熔丝的零电平。
    • 3. 发明授权
    • Nuclear fuel element having a composite coating
    • 具有复合涂层的核燃料元件
    • US4473410A
    • 1984-09-25
    • US308215
    • 1981-10-05
    • Willard T. GrubbLawrence H. King
    • Willard T. GrubbLawrence H. King
    • G21C3/20C23C11/00
    • G21C3/20Y02E30/40
    • A nuclear fuel element consisting of a zirconium or zirconium alloy container and nuclear fuel pellets is provided for use in the core of a nuclear reactor. The zirconium or zirconium alloy container has an inner coating of copper in proximity to the nuclear fuel, and is separated from the zirconium or zirconium alloy by an intermediate zirconium oxide diffusion barrier layer. The copper layer and the intermediate zirconium oxide diffusion barrier of the composite cladding reduce perforations or failure in the zirconium or zirconium alloy cladding substrate caused by stress corrosion cracking or metal embrittlement. Good bonding of the copper to the oxide zirconium and zirconium alloy prevents scaling of copper from the composite cladding during the loading of the fuel element with fuel pellets.
    • 提供由锆或锆合金容器和核燃料颗粒组成的核燃料元件用于核反应堆的核心。 锆或锆合金容器具有靠近核燃料的铜的内涂层,并且通过中间氧化锆扩散阻挡层与锆或锆合金分离。 复合包层的铜层和中间氧化锆扩散阻挡层减少了由应力腐蚀开裂或金属脆化引起的锆或锆合金包层基体的穿孔或失效。 铜与氧化物锆和锆合金的良好结合在燃料颗粒装载燃料元件期间防止了铜从复合包层的结垢。