公开(公告)号：US20140037037A1

公开(公告)日：2014-02-06

申请号：US13679287

申请日：2012-11-16

申请人： HITACHI-GE NUCLEAR ENERGY, LTD.

发明人： Tsuyoshi ITO ,  Hideyuki HOSOKAWA ,  Makoto NAGASE ,  Yoichi WADA ,  Kazushige ISHIDA ,  Motohiro AIZAWA

IPC分类号： G21C19/32

CPC分类号： G21C19/32 ,  G21C17/0225 ,  G21D1/00 ,  G21F9/06 ,  G21F9/12 ,  G21F9/30 ,  Y02E30/40

摘要： A noble metal injection apparatus is connected to a piping of a nuclear plant at the time of stop of the nuclear plant before start of the nuclear plant. In chemical decontamination, oxidation decontamination agent decomposition, and reduction decontamination on an inner surface of the pipe system are executed. After reduction decontamination, a part of an oxalic acid included in a reduction decontamination solution is decomposed and platinum is injected into the reduction decontamination solution of pH 3.5 or higher. When the platinum concentration becomes a preset concentration, a reduction agent is injected and the reduction decontamination solution including the platinum and reduction agent is brought into contact with the inner surface of the piping. The platinum is deposited on the inner surface of the piping. The injection of the platinum and reduction agent is stopped and the platinum and reduction agent are decomposed.

摘要翻译： 贵金属注入装置在核电厂启动之前停止核电站时连接到核电厂的管道。 在化学去污中，执行氧化去污剂分解和管道内表面上的还原去污。 减压除污后，还原去污溶液中含有的一部分草酸被分解，将铂注入pH 3.5以上的还原去污溶液中。 当铂浓度变为预设浓度时，注入还原剂，并且将包含铂和还原剂的还原性去污溶液与管道的内表面接触。 铂沉积在管道的内表面上。 铂和还原剂的注入停止，铂和还原剂分解。

公开(公告)号：US20130202791A1

公开(公告)日：2013-08-08

申请号：US13746907

申请日：2013-01-22

申请人： Hitachi-GE Nuclear Energy, Ltd.

发明人： Tsuyoshi ITO ,  Hideyuki HOSOKAWA ,  Yukio HIRAMA ,  Motoaki SAKASHITA ,  Makoto NAGASE

IPC分类号： C23C30/00

CPC分类号： C23C30/005 ,  C23C18/1651 ,  C23C18/1692 ,  C23C18/32 ,  C23C18/52 ,  G21C17/0225 ,  G21C19/28

摘要： A bath containing nickel ions and formic acid is injected into a film-forming aqueous solution flowing in a circulation pipe connected to a feed water pipe made of carbon steel in a BWR plant. This solution is supplied into the pipe through the circulation pipe, and a nickel metal film is formed on an inner surface of the pipe. After the film is formed, a film-forming aqueous solution containing iron (II) ions, formic acid, nickel ions, hydrogen peroxide, and hydrazine is supplied to the pipe. A nickel ferrite film is formed on the surface of the nickel metal film in the pipe. The nickel ferrite film comes into contact with water containing dissolved oxygen at or above 150° C. to transform the nickel metal film into a nickel ferrite film. A thick nickel ferrite film is formed on the inner surface of the feed water pipe.

摘要翻译： 将含有镍离子和甲酸的浴注入与在BWR设备中由碳钢制成的给水管连接的循环管中流动的成膜水溶液中。 该溶液通过循环管道供给到管中，并且在管的内表面上形成镍金属膜。 在形成膜之后，向管中供给含有铁（II）离子，甲酸，镍离子，过氧化氢和肼的成膜水溶液。 在管中的镍金属膜的表面上形成镍铁氧体膜。 镍铁氧体膜与等于或高于150℃的溶解氧的水接触以将镍金属膜转变成镍铁氧体膜。 在供水管的内表面上形成厚镍铁氧体膜。

公开(公告)号：US20180080115A1

公开(公告)日：2018-03-22

申请号：US15670403

申请日：2017-08-07

申请人： Hitachi-GE Nuclear Energy, Ltd.

发明人： Tsuyoshi ITOU ,  Hideyuki HOSOKAWA ,  Nobuyuki OOTA ,  Satoshi OOUCHI ,  Shintarou YANAGISAWA ,  Mizuho TSUYUKI ,  Makoto NAGASE ,  Kazushige ISHIDA ,  Toru KAWASAKI

IPC分类号： C23C14/14 ,  C23C14/58 ,  C25D7/00 ,  F16L58/08

CPC分类号： C23C14/14 ,  C23C14/5806 ,  C25D7/00 ,  F16L58/08 ,  G21C17/0225 ,  G21C19/307 ,  G21F9/04

摘要： There is provided an adhesion restraint method of a radionuclide to a carbon steel material of an atomic energy plant, in which an adhesion restraint effect of the radionuclide to the carbon steel material can continue for a longer term. A film forming apparatus is connected to a carbon steel purification system pipe of a BWR plant. A nickel formate aqueous solution and hydrazine are injected into a circulation pipe of the film forming apparatus. An aqueous solution including nickel formate and hydrazine is guided into a purification system pipe subjected to chemical decontamination, and a nickel metal film is formed on an inner surface of the pipe. A platinum ion aqueous solution and hydrazine are injected into the circulation pipe, and an aqueous solution including a platinum ion and hydrazine is supplied to the purification system pipe so as to adhere platinum to the surface of a nickel metal film. The film forming apparatus is detached from the purification system pipe, and the BWR plant is started. Reactor water of 200° C. or higher is guided into the purification system pipe, and thus the nickel metal film is converted into a nickel ferrite film which is not melted even by the adhering platinum and is stable.