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    Methods for operating and methods for reducing post-shutdown radiation levels of nuclear reactors
    2.
    发明申请
    Methods for operating and methods for reducing post-shutdown radiation levels of nuclear reactors 审中-公开
    降低核反应堆停堆后辐射水平的方法和方法

    公开(公告)号：US20100246745A1

    公开(公告)日：2010-09-30

    申请号：US11647432

    申请日：2006-12-29

    申请人： Samson Hettiarachchi ,  Juan Alberto Varela ,  Thomas Pompilio Diaz

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

    IPC分类号： G21C19/307

    CPC分类号： G21C19/28 ,  G21F9/28

    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： 用于操作核反应堆的方法可以包括在反应堆关闭之前，在反应堆关闭期间，或者在反应堆关闭之前和期间，在反应器中向水中加入一种或多种化学品。 一种或多种化学物质可能引发一种或多种放射性物质从反应器的至少一个外核表面释放到反应器水中。 减少核反应堆的停堆后辐射水平的方法可以包括在反应堆关闭之前，在反应器关闭期间，或在反应堆停堆之前和期间，在反应器中向水中加入一种或多种化学物质。 一种或多种化学品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。

    Application of catalytic nanoparticles to high temperature water systems to reduce stress corrosion cracking
    4.
    发明授权
    Application of catalytic nanoparticles to high temperature water systems to reduce stress corrosion cracking 失效
    催化纳米粒子在高温水体系中的应用，减少应力腐蚀开裂

    公开(公告)号：US06793883B2

    公开(公告)日：2004-09-21

    申请号：US09681993

    申请日：2001-07-05

    申请人： Peter Louis Andresen ,  Thomas Martin Angeliu ,  Young Jin Kim ,  Thomas Pompilio Diaz ,  Samson Hettiarachchi

    发明人： Peter Louis Andresen ,  Thomas Martin Angeliu ,  Young Jin Kim ,  Thomas Pompilio Diaz ,  Samson Hettiarachchi

    IPC分类号： C23F1102

    CPC分类号： G21C17/0225 ,  B01J23/42 ,  B01J35/0013 ,  B01J35/0053 ,  B01J35/006 ,  C23F11/18 ,  G21C19/307 ,  G21Y2002/103 ,  G21Y2004/20

    摘要： A method and system for reducing stress corrosion cracking in a hot water system, such as a nuclear reactor, by reducing the electrochemical corrosion potential of components exposed to high temperature water within the structure. The method includes the steps of: providing a reducing species to the high temperature water; and providing a plurality of noble metal nanoparticles having a mean particle size of up to about 100 nm to the high temperature water during operation of the hot water system. The catalytic nanoparticles, which may contain at least one noble metal, form a colloidal suspension in the high temperature water and provide a catalytic surface on which a reducing species reacts with least one oxidizing species present in the high temperature water. The concentration of the oxidizing species is reduced by reaction with the reducing species on the catalytic surface, thereby reducing the electrochemical corrosion potential of the component.

    摘要翻译： 通过降低暴露在结构内的高温水的组分的电化学腐蚀电位，减少诸如核反应堆的热水系统中的应力腐蚀开裂的方法和系统。 该方法包括以下步骤：向高温水提供还原物质; 并且在热水系统的操作期间向高温水提供多个平均粒度高达约100nm的贵金属纳米颗粒。 可以含有至少一种贵金属的催化纳米颗粒在高温水中形成胶体悬浮液，并提供催化表面，还原物质与高温水中存在的至少一种氧化物质反应。 通过与催化剂表面上的还原物质反应来降低氧化物质的浓度，从而降低组分的电化学腐蚀电位。

    System and method for determining noble metal concentrations in reactor coolant streams
    8.
    发明授权
    System and method for determining noble metal concentrations in reactor coolant streams 有权
    用于测定反应堆冷却剂流中贵金属浓度的系统和方法

    公开(公告)号：US06440297B1

    公开(公告)日：2002-08-27

    申请号：US09739181

    申请日：2000-12-18

    申请人： Young Jin Kim ,  John Yupeng Gui ,  Peter Louis Andresen ,  Thomas Pompilio Diaz ,  Samson Hettiarachchi

    发明人： Young Jin Kim ,  John Yupeng Gui ,  Peter Louis Andresen ,  Thomas Pompilio Diaz ,  Samson Hettiarachchi

    IPC分类号： G01N2726

    CPC分类号： G21C17/0225 ,  G01N27/423 ,  G01N33/1813 ,  G21C17/022 ,  G21Y2002/103

    摘要： A system and method for determining a noble metal concentration in a sample that is representative of a noble metal concentration in either a volume of water circulated through a nuclear reactor or a surface of a nuclear reactor component exposed to the volume of water. The system comprises: at least one standard having a predetermined concentration of the noble metal disposed its surface; an electrolyte bath for immersing one of the sample and the standard therein; an auxiliary electrode connectable to one of the sample and the standard; a power source connectable to a reference electrode and one of the standard and the sample; and a current measurement device capable of measuring a current passing between the auxiliary electrode and one of the sample and the standard. The power source is capable of providing a potential across the reference electrode and one of the sample and the standard, The noble metal concentration in the sample is determined relative to the predetermined concentration in the standard by comparing a sample current passing through the sample to a standard current passing through the standard.

    摘要翻译： 一种用于确定样品中贵金属浓度的系统和方法，其代表在通过核反应堆循环的水的体积或暴露于水体积的核反应堆组件的表面中的贵金属浓度。 该系统包括：具有预定浓度的贵金属的至少一个标准物，其设置在其表面上; 用于将样品和标准物中的一种浸入其中的电解质浴; 可连接到样品和标准品之一的辅助电极; 可连接到参考电极和标准品和样品之一的电源; 以及能够测量辅助电极和样品之一以及标准品之间的电流的电流测量装置。 电源能够在参考电极和样品和标准品之间提供电位。通过将通过样品的样品电流与一个样品的比较来确定样品中的贵金属浓度相对于标准中的预定浓度 标准电流通过标准。