公开(公告)号：US06549603B1

公开(公告)日：2003-04-15

申请号：US09657530

申请日：2000-09-08

申请人： Kazushige Ishida ,  Kazumi Anazawa ,  Yoshiyuki Takamori ,  Naohito Uetake ,  Makoto Nagase ,  Hiroo Yoshikawa ,  Tadashi Tamagawa

发明人： Kazushige Ishida ,  Kazumi Anazawa ,  Yoshiyuki Takamori ,  Naohito Uetake ,  Makoto Nagase ,  Hiroo Yoshikawa ,  Tadashi Tamagawa

IPC分类号： G21F900

CPC分类号： G21C17/0225 ,  G21F9/004 ,  G21Y2002/601 ,  G21Y2004/20

摘要： To suppress a decrease of thickness due to corrosion of structural members and to achieve a removal of radionuclides with good efficiency in a nuclear power plant, oxidation decontamination is first conducted. An aqueous potassium permanganate solution is supplied from a circulation line to a reactor pressure vessel, which is a stainless steel structural member, and a reactor water cleanup system piping and a drain piping, which are carbon steel structural members. These structural members are oxidation-decontaminated by the action of potassium permanganate. Then the above-mentioned structural members are reduction-decontaminated by using an aqueous oxalic acid solution. The aqueous oxalic acid solution contains hydrazine.

摘要翻译： 为了抑制由于结构构件的腐蚀而导致的厚度减小并且在核电站中实现高效率地去除放射性核素，首先进行氧化去污。 将高锰酸钾溶液从循环管线供给到作为碳素钢结构件的反应器压力容器，其为不锈钢结构构件，反应器水净化系统管道和排水管道。 这些结构构件通过高锰酸钾的作用进行氧化去污。 然后通过使用草酸水溶液还原去除上述结构构件。 草酸水溶液含有肼。

公开(公告)号：US06335475B1

公开(公告)日：2002-01-01

申请号：US09405217

申请日：1999-09-27

申请人： Makoto Nagase ,  Naohito Uetake ,  Kazushige Ishida ,  Fumito Nakamura ,  Kazumi Anazawa ,  Tadashi Tamagawa ,  Hiroo Yoshikawa

发明人： Makoto Nagase ,  Naohito Uetake ,  Kazushige Ishida ,  Fumito Nakamura ,  Kazumi Anazawa ,  Tadashi Tamagawa ,  Hiroo Yoshikawa

IPC分类号： G21F900

CPC分类号： G21F9/004

摘要： Processes of reductive decontamination using an agent containing at least two kinds of components, and then decomposing the agent using an apparatus for decomposing at least two kinds of chemical substances in the agent, are employed in chemical decontamination. A catalyst decomposition column in an upstream side of an ion exchange resin column and a hydrogen peroxide injection apparatus in a further upstream side, reduce the amount of waste products caused by a chemical decontaminating agent where a mixed decontaminating agent for a composition trapped in a cation resin column and for a composition trapped in an anion exchange resin are used for the chemical decontaminating agent, selectively decompose the composition trapped in the cation resin column in an inlet side of a cleaning apparatus when radioactive nuclides in the decontaminating agent are cleansed using the cation resin column during decontamination, and decompose both compositions after completion of the decontamination. The chemical decontamination thus selectively decomposes the chemical decontaminating agent, which is a component of the load to the cation resin column. The chemical decontamination moderates corrosion of material by using a chemical decontaminating agent decomposing apparatus capable of decomposing the components trapped by the cation exchange resin and components trapped by an anion exchange resin at the same time.

摘要翻译： 使用含有至少两种组分的试剂进行还原去污的方法，然后使用用于在试剂中分解至少两种化学物质的装置分解试剂，用于化学去污。 在离子交换树脂柱的上游侧的催化剂分解塔和进一步的上游侧的过氧化氢注入装置，减少由化学去污剂引起的废物的量，其中用于组合物捕获在阳离子中的混合净化剂 树脂柱和捕获在阴离子交换树脂中的组合物用于化学净化剂，当清除剂中的放射性核素用阳离子清洗时，选择性地分解在清洁装置的入口侧捕获在阳离子树脂柱中的组合物 在去污过程中树脂柱，并且在去污完成后分解两种组合物。 化学去污因此选择性地将作为负荷成分的化学净化剂分解到阳离子树脂柱中。 化学去污通过使用能够分解被阳离子交换树脂捕获的成分和同时被阴离子交换树脂捕获的成分的化学除污剂分解装置来缓和材料的腐蚀。

公开(公告)号：US06973154B2

公开(公告)日：2005-12-06

申请号：US10000338

申请日：2001-12-04

申请人： Makoto Nagase ,  Naohito Uetake ,  Kazushige Ishida ,  Fumito Nakamura ,  Kazumi Anazawa ,  Tadashi Tamagawa ,  Hiroo Yoshikawa

发明人： Makoto Nagase ,  Naohito Uetake ,  Kazushige Ishida ,  Fumito Nakamura ,  Kazumi Anazawa ,  Tadashi Tamagawa ,  Hiroo Yoshikawa

IPC分类号： G21F9/00

CPC分类号： G21F9/004

摘要： In a chemical decontamination method of chemically decontaminating radioactive nuclides from a metallic material, oxalic acid and hydrazine are injected as a reductive decontaminating agent into water that is in contact with the metallic material. Injection of the hydrazine is stopped after a cation resin arranged in a circulation line connected to the metallic material breaks, and at least the oxalic acid and the hydrazine in the reductive decontaminating agent are decomposed using a decomposing catalyst.

摘要翻译： 在从金属材料中化学去除放射性核素的化学去污方法中，将草酸和肼作为还原净化剂注入与金属材料接触的水中。 在与金属材料连接的循环管线中布置的阳离子树脂断裂后，停止注入肼，并且使用分解催化剂将还原性净化剂中的至少草酸和肼分解。

公开(公告)号：US06921515B2

公开(公告)日：2005-07-26

申请号：US10000083

申请日：2001-12-04

申请人： Makoto Nagase ,  Naohito Uetake ,  Kazushige Ishida ,  Fumito Nakamura ,  Kazumi Anazawa ,  Tadashi Tamagawa ,  Hiroo Yoshikawa

发明人： Makoto Nagase ,  Naohito Uetake ,  Kazushige Ishida ,  Fumito Nakamura ,  Kazumi Anazawa ,  Tadashi Tamagawa ,  Hiroo Yoshikawa

IPC分类号： G21F9/28 ,  G21F9/00 ,  B32B27/04

CPC分类号： G21F9/004

摘要： In a chemical decontamination apparatus, a catalyst decomposition column in an upstream side of an ion exchange resin column and a hydrogen peroxide injection apparatus in a further upstream side, reduce the amount of waste products caused by a chemical decontaminating agent where a mixed decontaminating agent for a composition trapped in a cation resin column and for a composition trapped in an anion exchange resin are used for the chemical decontaminating agent, selectively decompose the composition trapped in the cation resin column in an inlet side of a cleaning apparatus when radioactive nuclides in the decontaminating agent are cleansed using the cation resin column during decontamination, and decompose both compositions after completion of the decontamination. The chemical decontamination thus selectively decomposes the chemical decontaminating agent, which is a component of the load to the cation resin column.

摘要翻译： 在化学去污装置中，离子交换树脂柱的上游侧的催化剂分解塔和上游侧的过氧化氢注入装置减少由化学净化剂引起的废物的量，其中混合净化剂 将用于阴离子交换树脂的组分捕获在阳离子树脂柱中，并且用于阴离子交换树脂中的组合物用于化学去污剂中，当在去污剂中放射性核素时，选择性地分解在清洁设备的入口侧捕获在阳离子树脂柱中的组合物 在去污期间使用阳离子树脂柱清洁剂，并且在去污完成后分解两种组合物。 化学去污因此选择性地将作为负荷成分的化学净化剂分解到阳离子树脂柱中。

公开(公告)号：US5715290A

公开(公告)日：1998-02-03

申请号：US260472

申请日：1994-06-14

申请人： Naohito Uetake ,  Masayoshi Kondoh ,  Makoto Nagase ,  Hideyuki Hosokawa ,  Teruo Hara ,  Yamato Asakura ,  Katsumi Ohsumi ,  Kazuhiko Akamine ,  Kouichi Yamane

发明人： Naohito Uetake ,  Masayoshi Kondoh ,  Makoto Nagase ,  Hideyuki Hosokawa ,  Teruo Hara ,  Yamato Asakura ,  Katsumi Ohsumi ,  Kazuhiko Akamine ,  Kouichi Yamane

IPC分类号： G21C3/06 ,  G21C17/022 ,  G21C19/30 ,  G21C19/307 ,  G21D1/00 ,  G21D3/08 ,  G21C19/28

CPC分类号： G21C17/0225 ,  G21C19/307

摘要： In reactor water control for a BWR power plant during an operation cycle after loading new fuel rods in the BWR power plant, an operation is performed which accelerates deposition of crud on the fuel rods until the deposition amount of the crud on the fuel rods reaches a predetermined target value within the operation cycle concerned. After the deposition amount of the crud has reached the predetermined target value, the crud deposition accelerating operation is terminated, whereby even when loading new fuel rods such as Zr liner type fuel rods having a surface on which metal ion deposition has been difficult, radioactivity in the reactor water is efficiently reduced.

摘要翻译： 在BWR发电厂装载新的燃料棒之后的操作循环期间，在BWR发电厂的反应堆水控制中，执行加速燃料棒上的原油沉积的操作，直到燃料棒上的原油的沉积量达到 相关操作循环中的预定目标值。 在原油的沉积量达到预定目标值之后，终止原油沉积加速操作，由此即使当装载具有难以进行金属离子沉积的表面的诸如Zr衬垫式燃料棒的新的燃料棒时，放射性 反应器水被有效地减少。

公开(公告)号：US5377245A

公开(公告)日：1994-12-27

申请号：US137975

申请日：1993-10-19

申请人： Naohito Uetake ,  Makoto Nagase ,  Masayoshi Kondoh ,  Toshio Sawa ,  Shunsuke Uchida ,  Yamato Asakura

发明人： Naohito Uetake ,  Makoto Nagase ,  Masayoshi Kondoh ,  Toshio Sawa ,  Shunsuke Uchida ,  Yamato Asakura

IPC分类号： G21C19/307 ,  G21D1/00 ,  G21D3/08 ,  G21F9/28 ,  G21C9/00

CPC分类号： G21C19/307 ,  G21Y2002/501 ,  G21Y2002/601 ,  G21Y2004/20

摘要： An object of the present invention is to provide a method and a nuclear plant capable of preventing deposition and activation of crud to a nuclear fuel rod and decreasing the radioactivity level in reactor water. Metal ions solely having a low deposition rate coefficient are made to coexist to prevent or decrease deposition of radioactive corrosion products to the nuclear fuel rod. A method and a nuclear plant capable of preventing deposition and activation of crud to the nuclear fuel rod and decreasing the radioactivity level in reactor water can be provided.

摘要翻译： 本发明的一个目的是提供一种能够防止核燃料棒堆积和活化的方法和核电站，降低反应堆水中的放射性水平。 仅使具有低沉积速率系数的金属离子共存以防止或减少放射性腐蚀产物沉积到核燃料棒。 可以提供能够防止核燃料棒的原油沉积和活化并降低反应堆水中的放射性水平的方法和核电站。

公开(公告)号：US5398269A

公开(公告)日：1995-03-14

申请号：US33548

申请日：1993-03-18

申请人： Makoto Nagase ,  Yamato Asakura ,  Naohito Uetake ,  Toshio Sawa ,  Shunsuke Uchida ,  Renzo Takeda ,  Katsumi Ohsumi

发明人： Makoto Nagase ,  Yamato Asakura ,  Naohito Uetake ,  Toshio Sawa ,  Shunsuke Uchida ,  Renzo Takeda ,  Katsumi Ohsumi

IPC分类号： G21D1/00 ,  G21C19/307 ,  G21D3/08

CPC分类号： G21C19/307 ,  G21Y2002/103 ,  G21Y2004/10 ,  G21Y2004/20 ,  G21Y2004/40

摘要： A water quality control method for a nuclear power plant comprising the steps of maintaining the iron concentration in the feed water below 0.05 ppb by increasing iron removing rate at a condensed water purifying loop, shifting the pH of the reactor water below a pH of 6.8 determined at a room temperature by injecting carbon dioxide gas in the primary cooling system and further optionally reducing the dissolved oxygen concentration in the reactor water below 20 ppb by injecting hydrogen gas into the primary cooling system, whereby .sup.60 Co ion concentration in the primary cooling system is maintained low for a long interval.

摘要翻译： 一种用于核电厂的水质控制方法，包括以下步骤：通过在冷凝水净化回路中提高除铁速率将供水中的铁浓度保持在0.05ppb以下，将反应器水的pH值调至低于6.8的pH值 在室温下通过在一次冷却系统中注入二氧化碳气体，并且进一步任选地通过将氢气注入一次冷却系统中将反应器内的低于20ppb的水中的溶解氧浓度降低，由此维持一次冷却系统中的60Co离子浓度 低间隔很长。

公开(公告)号：US06907891B2

公开(公告)日：2005-06-21

申请号：US10078347

申请日：2002-02-21

申请人： Kazumi Anazawa ,  Motoaki Sakashita ,  Makoto Nagase

发明人： Kazumi Anazawa ,  Motoaki Sakashita ,  Makoto Nagase

IPC分类号： G21F9/28 ,  G21F9/00

CPC分类号： G21F9/001

摘要： A radioactive substance decontamination method and apparatus which decontaminates a metal member contaminated by radioactive substance in a short period of time. This apparatus has (1) multiple reducing decontamination tanks having different radiation control values; (2) a carrier for immersing the metal member into the multiple reducing decontamination tanks and a washing tank; (3) a tube for transferring into the second reducing decontamination tank the reducing decontamination agent in the first reducing decontamination tank; (4) a reducing agent decomposer for decomposing a component contained in the reducing decontamination agent of the reducing decontamination tank where the radiation control value is the highest out of the reducing decontamination tanks connected by the tube; and (5) a washing tank for washing the reducing decontamination agent deposited on the decontaminated metal member.

公开(公告)号：US20050014989A1

公开(公告)日：2005-01-20

申请号：US10807156

申请日：2004-03-24

申请人： Kazumi Anazawa ,  Motoaki Sakashita ,  Makoto Nagase

发明人： Kazumi Anazawa ,  Motoaki Sakashita ,  Makoto Nagase

IPC分类号： G21F9/28 ,  G21F9/00

CPC分类号： G21F9/001

摘要： A radioactive substance decontamination method and apparatus which decontaminates a metal member contaminated by radioactive substance in a short period of time. This apparatus has (1) multiple reducing decontamination tanks having different radiation control values; (2) a carrier for immersing the metal member into the multiple reducing decontamination tanks and a washing tank; (3) a tube for transferring into the second reducing decontamination tank the reducing decontamination agent in the first reducing decontamination tank; (4) a reducing agent decomposer for decomposing a component contained in the reducing decontamination agent of the reducing decontamination tank where the radiation control value is the highest out of the reducing decontamination tanks connected by the tube; and (5) a washing tank for washing the reducing decontamination agent deposited on the decontaminated metal member.

摘要翻译： 一种放射性物质去污方法和设备，可在短时间内对被放射性物质污染的金属构件进行净化。 该装置具有（1）具有不同辐射控制值的多个还原净化槽; （2）用于将金属构件浸入多个还原净化槽和洗涤槽中的载体; （3）用于将第一还原去污罐中的还原去污剂转移到第二还原去污罐中的管; （4）一种还原剂分解器，用于分解由所述管连接的还原净化槽中的最大值的所述还原净化槽的还原去污剂中所含的成分， 和（5）用于洗涤沉积在去污金属构件上的还原去污剂的洗涤槽。

公开(公告)号：US07811392B2

公开(公告)日：2010-10-12

申请号：US11485984

申请日：2006-07-14

申请人： Hideyuki Hosokawa ,  Makoto Nagase ,  Kazushige Ishida ,  Youichi Wada ,  Naoshi Usui ,  Motohiro Aizawa ,  Motomasa Fuse

发明人： Hideyuki Hosokawa ,  Makoto Nagase ,  Kazushige Ishida ,  Youichi Wada ,  Naoshi Usui ,  Motohiro Aizawa ,  Motomasa Fuse

IPC分类号： C23C8/40 ,  G21C9/00

CPC分类号： G21C13/087 ,  C23F15/00 ,  G21C19/00 ,  G21Y2002/201 ,  G21Y2004/40 ,  Y02E30/40

摘要： It is an object of the present invention to efficiently suppress radionuclide deposition on a reactor component of nuclear power plant. Radionuclide deposition on the surface of a metallic reactor component of nuclear power plant is suppressed by forming a ferrite film on the component, wherein the film is formed, after decontamination for removing radionuclides contaminants from the component surface is completed and before the plant is started up, by contacting a treatment solution which mixes a first agent containing the iron (II) ions, a second agent for oxidizing the iron (II) ions into the iron (III) ions and a third agent for adjusting pH level of a solution to 5.5 to 9.0 in this order with the reactor component surface.

摘要翻译： 本发明的目的是有效地抑制放射性核素沉积在核电站的反应器部件上。 核电站金属反应堆部件表面上的放射性核素沉积被抑制，在部件上形成铁氧体膜，其中形成膜，在从组件表面去除放射性核素污染物的净化完成之后并且在工厂启动之前 通过使含有铁（II）离子的第一试剂混合的处理溶液与将铁（II）离子氧化成铁（III）离子的第二试剂和用于将溶液的pH水平调节至5.5的第三试剂接触 以9.0的顺序与反应器组件表面。