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    Zirconium alloys for a nuclear fuel cladding having a superior oxidation resistance in a severe reactor operation condition and methods of preparing a zirconium alloy nuclear cladding by using thereof
    1.
    发明授权
    Zirconium alloys for a nuclear fuel cladding having a superior oxidation resistance in a severe reactor operation condition and methods of preparing a zirconium alloy nuclear cladding by using thereof 有权
    用于核燃料包层的锆合金在严格的反应器操作条件下具有优异的抗氧化性，以及通过使用它制备锆合金核包层的方法

    公开(公告)号：US09111650B2

    公开(公告)日：2015-08-18

    申请号：US13747763

    申请日：2013-01-23

    Applicant: KOREA ATOMIC ENERGY RESEARCH INSTITUTE ,  KOREA HYDRO AND NUCLEAR POWER CO., LTD.

    Inventor： Jeong-Yong Park ,  Yang-Il Jung ,  Hyun Gil Kim ,  Byoung-Kwon Choi ,  Sang Yoon Park ,  Dong Jun Park ,  Yang-Hyun Koo

    IPC: G21C3/07 ,  C22C16/00 ,  G21C21/10 ,  C22F1/18

    CPC classification number: G21C3/07 ,  C22C16/00 ,  C22F1/186 ,  G21C21/10 ,  Y02E30/40

    Abstract: Disclosed are a zirconium alloy for a nuclear fuel cladding having a good oxidation resistance in a severe reactor operation condition and a method of preparing zirconium alloy nuclear fuel claddings by using thereof. The zirconium alloy includes 1.8 to 2.0 wt % of niobium (Nb); at least one element selected from iron (Fe), chromium (Cr) and copper (Cu); 0.1 to 0.15 wt % of oxygen (O); 0.008 to 0.012 wt % of silicon (Si) and a remaining amount of zirconium (Zr). The amount of Fe is 0.1 to 0.4 wt %, the amount of Cr is 0.05 to 0.2 wt %, and the amount of Cu is 0.03 to 0.2 wt %. A good oxidation resistance of the nuclear fuel cladding may be confirmed under a severe reactor operation condition at an accident condition as well as a normal operating condition of a reactor, thereby improving economic efficiency and safety.

    Abstract translation: 公开了一种在严格的反应器运行条件下具有良好的抗氧化性的核燃料包覆用锆合金，以及通过使用它们制备锆合金核燃料包层的方法。 锆合金含有1.8〜2.0重量％的铌（Nb）; 选自铁（Fe），铬（Cr）和铜（Cu）中的至少一种元素; 0.1〜0.15重量％的氧（O）; 硅（Si）0.008〜0.012重量％，锆（Zr）余量。 Fe的量为0.1〜0.4重量％，Cr的含量为0.05〜0.2重量％，Cu的含量为0.03〜0.2重量％。 在反应堆的事故状态以及反应堆的正常运行状态下，在严格的反应堆操作条件下，可以确认核燃料包层的良好的抗氧化性，从而提高经济效率和安全性。

    Oxidation decontamination reagent for removal of the dense radioactive oxide layer on the metal surface and oxidation decontamination method using the same
    4.
    发明授权
    Oxidation decontamination reagent for removal of the dense radioactive oxide layer on the metal surface and oxidation decontamination method using the same 有权
    用于去除金属表面致密的放射性氧化物层的氧化去污试剂和使用其的氧化去污方法

    公开(公告)号：US09390822B2

    公开(公告)日：2016-07-12

    申请号：US14304744

    申请日：2014-06-13

    Applicant: KOREA ATOMIC ENERGY RESEARCH INSTITUTE

    Inventor： Sang Yoon Park ,  Hui-Jun Won ,  Wangkyu Choi ,  Jeikwon Moon ,  Chong-Hun Jung ,  In-Ho Yoon ,  Jun-Young Jung

    IPC: G21F9/00 ,  C23F15/00 ,  G21F9/28 ,  C23G1/08 ,  C23G1/10

    CPC classification number: G21F9/004 ,  C23F15/00 ,  C23G1/085 ,  C23G1/10 ,  G21F9/28

    Abstract: The present invention provides an oxidative decontamination reagent for removal of the dense radioactive oxide layer on a metal surface, which comprises an oxidizing agent, a metal ion, and an inorganic acid. The oxidative decontamination reagent of the present invention is characteristically prepared by adding a metal ion to the conventional oxidative decontamination reagent containing an oxidizing agent and an inorganic acid. When the oxidative decontamination reagent of the present invention is used, electric potential of the metal parts of the primary system of the nuclear power plant can be regulated as passive potential owing to the added metal ion during the oxidative decontamination of the primary metal part of the nuclear power plant. Therefore, by maintaining electric potential of the metal part as passive potential, local corrosion can be inhibited and at the same time secondary waste can be significantly reduced.

    Abstract translation: 本发明提供一种用于去除金属表面上的致密放射性氧化物层的氧化去污试剂，其包括氧化剂，金属离子和无机酸。 本发明的氧化去污试剂的特征在于，将常规的含有氧化剂和无机酸的氧化性去污剂加入金属离子。 当使用本发明的氧化性去污试剂时，核电站的一次系统的金属部分的电位可以被调节为被动电位，这是由于在金属离子的主要金属部分的氧化去污期间由于添加的金属离子 核电站。 因此，通过将金属部件的电位维持为被动电位，可以抑制局部腐蚀，同时能够显着降低二次废弃物。

    Chelate Free Chemical Decontamination Reagent for Removal of the Dense Radioactive Oxide Layer on the Metal Surface and Chemical Decontamination Method Using the Same
    9.
    发明申请
    Chelate Free Chemical Decontamination Reagent for Removal of the Dense Radioactive Oxide Layer on the Metal Surface and Chemical Decontamination Method Using the Same 审中-公开
    用于去除金属表面上密集放射性氧化物层的螯合物自由化学去污剂和使用其的化学去污方法

    公开(公告)号：US20140205052A1

    公开(公告)日：2014-07-24

    申请号：US14017728

    申请日：2013-09-04

    Applicant: Korea Hydro And Nuclear Power Co., Ltd. ,  Korea Atomic Energy Research Institute

    Inventor： Hui-Jun Won ,  Chong-Hun Jung ,  Sang Yoon Park ,  Wangkyu Choi ,  Jung-Sun Park ,  Jeikwon Moon ,  In-Ho Yoon ,  Byung-Seon Choi

    IPC: G21F9/00

    CPC classification number: G21F9/004 ,  C23G1/02 ,  C23G1/085 ,  C23G1/10 ,  C23G1/106

    Abstract: A chemical decontamination reagent containing a reducing agent, a reductive metal ion, and an inorganic acid is provided to remove a radioactive oxide layer on a metal surface. The reagent can dissolve the radioactive oxide layer on the metal surface effectively at a relatively low temperature and enables a simple process of contacting the reagent to the radioactive oxide, thus economically effective in terms of cost and time required for the process. Since the decontamination does not use a conventional organic chelating agent such as oxalic acid, but the reducing agent as a main substance, the residuals of the reducing agent remained after decontamination can be decomposed and removed with an oxidizing agent. Due to the easy decomposition with the chemical decontamination reagent, secondary wastes can be minimized and the radionuclides remained in the decontamination reagent solution can be removed effectively.

    Abstract translation: 提供含有还原剂，还原性金属离子和无机酸的化学去污试剂以去除金属表面上的放射性氧化物层。 试剂可以在相对较低的温度下有效地溶解在金属表面上的放射性氧化物层，并且能够使试剂与放射性氧化物接触的简单过程，从而在该方法所需的成本和时间方面经济上有效。 由于去污不使用常规的有机螯合剂如草酸而是还原剂作为主要物质，所以在去污后残留的还原剂的残留物可以用氧化剂分解和除去。 由于化学去污剂容易分解，二次废物可以最小化，并且可以有效去除残留在去污试剂溶液中的放射性核素。

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