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    FUEL HANDLING SYSTEM, LAYOUT, AND PROCESS FOR NUCLEAR REACTOR
    1.
    发明申请
    FUEL HANDLING SYSTEM, LAYOUT, AND PROCESS FOR NUCLEAR REACTOR 有权

    公开(公告)号：US20230024749A1

    公开(公告)日：2023-01-26

    申请号：US17863346

    申请日：2022-07-12

    申请人： TerraPower, LLC

    发明人： John E. Truax ,  Trevor R. McWilliams

    IPC分类号： G21C19/32 ,  G21C19/08 ,  G21C19/19

    摘要： A method of handling spent nuclear fuel assemblies immerses the spent nuclear fuel assemblies in water in a relatively short time period when compared to traditional methods. A spent nuclear fuel assembly is removed from a nuclear reactor core, inserted into a sodium removal machine having a receiver, a cleaning vessel, and an elevator. A cleaning fluid is applied to the cleaning vessel and fuel assembly, and the fuel assembly is flushed with water while in the cleaning vessel. The cleaning vessel is at least partially submerged in the spent fuel pool during cleaning to provide passive heat removal. The cleaning vessel is lowered by an elevator into the spent fuel pool. The fuel assembly may then be loaded into a rack and/or a cask for long-term storage.

    ZAMAK STABILIZATION OF SPENT SODIUM-COOLED REACTOR FUEL ASSEMBLIES
    2.
    发明申请
    ZAMAK STABILIZATION OF SPENT SODIUM-COOLED REACTOR FUEL ASSEMBLIES 有权

    公开(公告)号：US20220336118A1

    公开(公告)日：2022-10-20

    申请号：US17230182

    申请日：2021-04-14

    申请人： TerraPower, LLC

    发明人： Robert A. Corbin ,  Pavel Hejzlar ,  John E. Truax ,  Mark R. Werner

    IPC分类号： G21F9/30 ,  G21F1/08 ,  C22C18/04 ,  C23C22/72

    摘要： Methods and systems for stabilizing spent fuel assemblies from sodium-cooled nuclear reactors using Zamak are described herein. It has been determined that there is a synergism between Zamak and sodium that allows Zamak to form thermally-conductive interface with the sodium-wetted surfaces of the fuel assemblies. In the method, one or more spent fuel assemblies are removed from the sodium coolant pool and placed in a protective sheath. The remaining volume of the sheath is then filled with liquid Zamak. To a certain extent Zamak will dissolve and alloy with sodium remaining on the fuel assemblies. Excess sodium that remains undissolved is displaced from the sheath by the Zamak fill. The Zamak is then cooled until solid and the sheath sealed. The resulting Zamak-stabilized spent fuel assembly is calculated to have sufficient internal thermal conductivity to allow it to be stored and transported without the need for liquid cooling.