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    Methods of reducing hydrogen absorption in zirconium alloys of nuclear fuel assembly
    1.
    发明公开
    Methods of reducing hydrogen absorption in zirconium alloys of nuclear fuel assembly 有权
    维吾尔语zur uk wasserstoffabsorption bei Zirkoniumlegierungen einesKernbrennstabbündels

    公开(公告)号：EP1703523A2

    公开(公告)日：2006-09-20

    申请号：EP06251222.3

    申请日：2006-03-08

    申请人： GENERAL ELECTRIC COMPANY

    发明人： Hettiarachchi, Samson ,  Lutz, Daniel Reese

    IPC分类号： G21C3/07 ,  G21C11/00

    CPC分类号： G21C11/00 ,  G21C3/07 ,  G21Y2002/102 ,  G21Y2002/103 ,  G21Y2002/303 ,  G21Y2004/10 ,  Y02E30/40

    摘要： A method of reducing hydrogen absorption in fuel assembly (46) components fabricated from zirconium alloys in a nuclear reactor (10) is provided. The method includes, in an exemplary embodiment, depositing at least one noble metal on at least one surface of the fuel assembly component. Depositing at least one noble metal includes exposing the zirconium alloy fuel assembly components, outside the nuclear reactor, to an aqueous solution including at least one compound containing at least one noble metal.

    摘要翻译： 提供了一种在核反应堆（10）中减少由锆合金制成的燃料组件（46）中的氢吸收的方法。 在一个示例性实施例中，该方法包括在燃料组件部件的至少一个表面上沉积至少一种贵金属。 沉积至少一种贵金属包括将核反应堆外的锆合金燃料组合物组分暴露于包含至少一种含有至少一种贵金属的化合物的水溶液中。

    Method of mitigating corrosion
    2.
    发明公开
    Method of mitigating corrosion 失效
    Verfahren zur Verringerung der Korrosion

    公开(公告)号：EP0731191A1

    公开(公告)日：1996-09-11

    申请号：EP96300443.7

    申请日：1996-01-23

    申请人： GENERAL ELECTRIC COMPANY

    发明人： Hettiarachchi, Samson

    IPC分类号： C23F11/18 ,  G21C17/022

    CPC分类号： G21C17/0225 ,  B01J37/031 ,  C23F11/08 ,  C23F11/18 ,  G01N17/02 ,  G21C3/07 ,  G21C17/02 ,  G21C17/022 ,  G21C19/28 ,  G21C19/30 ,  G21C19/307 ,  G21Y2002/102 ,  G21Y2002/103 ,  G21Y2002/104 ,  G21Y2002/204 ,  G21Y2004/10 ,  G21Y2004/20 ,  G21Y2004/30 ,  G21Y2004/40 ,  Y02E30/40

    摘要： A method for mitigating crack growth on the surface of stainless steel or other alloy components in a water-cooled nuclear reactor wherein a solution or suspension of a compound containing a noble metal is injected into the coolant water along with a reducing agent. The presence of the reducing agent will assist in better deposition of the noble metal, for example, palladium, on metal surfaces, thereby increasing the noble metal loading and also improving the tenacity with which the noble metal is bound onto the metal. The extent of noble metal doping is important in providing a better (lower) ECP response of the metal in the presence of a stoichiometric ratio of H 2 to 0 2 , which reduces the hydrogen demand considerably. The more tenacious the noble metal is bound to the metal surface, the longer its expected life will be, particularly under in-reactor situations where the metal surfaces are subjected to a variety of hydrodynamic conditions.

    摘要翻译： 一种用于减轻水冷核反应堆中不锈钢或其他合金组分表面上的裂纹扩展的方法，其中含有贵金属的化合物的溶液或悬浮液与还原剂一起注入冷却水中。 还原剂的存在将有助于在金属表面上更好地沉积贵金属（例如钯），从而增加贵金属负载量，并且还提高贵金属结合到金属上的韧性。 贵金属掺杂的程度对于在化学计量比为H 2至O 2的情况下提供更好的（较低的）ECP响应是重要的，这大大降低了氢的需求。 贵金属与金属表面结合的韧性越高，其预期寿命越长，特别是在金属表面经受各种流体动力学条件的反应堆内情况下。

    Methods for operating and methods for reducing post-shutdown radiation levels of nuclear reactors
    5.
    发明公开
    Methods for operating and methods for reducing post-shutdown radiation levels of nuclear reactors 有权
    操作核反应堆和方法，用于降低其关闭辐射水平后本的方法

    公开(公告)号：EP1939891A2

    公开(公告)日：2008-07-02

    申请号：EP07123684.8

    申请日：2007-12-19

    申请人： General Electric Company

    发明人： Hettiarachchi, Samson ,  Varela, Juan Alberto ,  Diaz, Thomas Pompilio

    IPC分类号： G21C13/10 ,  G21C19/28 ,  G21F9/00

    CPC分类号： G21C19/28 ,  G21F9/28 ,  G21Y2002/103 ,  G21Y2002/501 ,  G21Y2004/20 ,  G21Y2004/40

    摘要： A method for operating a nuclear reactor may include adding one or more chemicals to water in the reactor prior to reactor shutdown, during reactor shutdown, or prior to and during reactor shutdown. The one or more chemicals may trigger release of one or more radioactive substances from at least one out-of-core surface of the reactor into the reactor water. A method for reducing post-shutdown radiation levels of a nuclear reactor may include adding one or more chemicals to water in the reactor prior to reactor shutdown, during reactor shutdown, or prior to and during reactor shutdown. The one or more chemicals may include, for example, one or more metals, metal ions, metal compounds, metals and metal ions, metals and metal compounds, metal ions and metal compounds, or metals, metal ions, and metal compounds.

    摘要翻译： 一种用于操作核反应堆方法可以包括将一种或多种化学物质的水在之前停堆反应器中，反应器关闭期间，或之前和反应器关闭期间。 所述一个或多个化学物质可以触发一个或多个放射性物质释放从反应器中的至少一个外的芯体表面到反应器中的水。 一种用于减少核反应堆的关闭后的辐射水平的方法可以包括将一种或多种化学物质的水在反应器关闭之前反应器中，反应器停工，或之前和反应器关闭期间中。 所述一个或多个化学物质可以包括，例如，一种或多种金属，金属离子，金属化合物，金属和金属离子，金属和金属化合物，金属离子和金属化合物，或金属，金属离子，和金属化合物。

    Method of reducing the corrosion potential of components
    7.
    发明公开
    Method of reducing the corrosion potential of components 失效
    Verfahren zum Verringern des Korrosionspotentials von Bauteilen。

    公开(公告)号：EP0671485A1

    公开(公告)日：1995-09-13

    申请号：EP95301028.7

    申请日：1995-02-17

    申请人： GENERAL ELECTRIC COMPANY

    发明人： Hettiarachchi, Samson ,  Diaz, Thomas Pompilio

    IPC分类号： C23F11/08 ,  C23F11/18 ,  G21C19/30

    CPC分类号： G21C17/0225 ,  C23F11/08 ,  C23F11/18 ,  G21C19/30 ,  G21C19/307 ,  G21Y2002/103 ,  G21Y2002/104 ,  G21Y2002/201 ,  G21Y2004/101 ,  G21Y2004/20 ,  G21Y2004/40

    摘要： A method for mitigating general corrosion and crack initiation and growth on the surface of metal components in a water-cooled nuclear reactor. A compound containing a non-noble metal such as zirconium or titanium is injected into the water of the reactor in the form of a solution or suspension. This compound decomposes under reactor thermal conditions to release ions/atoms of the non-noble metal which incorporate in or deposit on the surfaces of the components, including the interior surfaces of any cracks formed therein. The compound may be organic, organometallic or inorganic in nature. Zirconium deposited inside a crack will reduce the electrochemical potential inside the crack even if the bulk surface zirconium is depleted under high fluid flow conditions. As a result, the electrochemical potential inside the crack is decreased to a level below the critical potential to protect against intergranular stress corrosion cracking.

    摘要翻译： 一种减轻水冷核反应堆中金属组分表面的一般腐蚀和裂纹引发和生长的方法。 含有非贵金属如锆或钛的化合物以溶液或悬浮液的形式注入反应器的水中。 该化合物在反应器热条件下分解以释放非贵金属的离子/原子，该离子/原子掺入或沉积在组分的表面上，包括其中形成的任何裂纹的内表面。 化合物本质上可以是有机的，有机金属的或无机的。 沉积在裂纹内的锆会降低裂纹内部的电化学电势，即使在高流体流动条件下体表面锆耗尽。 结果，裂纹内部的电化学电位降低到临界电位以下以防止晶间应力腐蚀开裂。