公开(公告)号：US5761263A

公开(公告)日：1998-06-02

申请号：US581200

申请日：1995-12-29

申请人： Naohito Uetake ,  Masayoshi Kondoh ,  Katsumi Ohsumi ,  Akira Maru ,  Yamato Asakura

发明人： Naohito Uetake ,  Masayoshi Kondoh ,  Katsumi Ohsumi ,  Akira Maru ,  Yamato Asakura

IPC分类号： G21C3/06 ,  G21C3/00

CPC分类号： G21C3/06 ,  G21Y2002/103 ,  G21Y2004/20 ,  G21Y2004/30 ,  Y02E30/40

摘要： In a nuclear fuel rod having a zirconium liner and a method of manufacturing the same, the outer surface of a zircaloy cladding tube in which fuel pellets are filled has an oxide film having fine irregularities of which the pitch is 1 .mu.m or less. The fine irregularities are formed by oxidizing the surface in high temperature steam or polishing the surface of the cladding tube. The surface of the fuel rod can effectively trap radioactive substances in the reactor water.

摘要翻译： 在具有锆衬垫的核燃料棒及其制造方法中，填充有燃料粒子的氧化锆包覆管的外表面具有间距为1μm以下的微细凹凸的氧化膜。 通过在高温蒸汽中氧化表面或抛光包层管的表面形成微细凹凸。 燃料棒的表面可以有效地捕获反应堆水中的放射性物质。

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：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：US5892805A

公开(公告)日：1999-04-06

申请号：US683980

申请日：1996-07-22

申请人： Kouichi Yamane ,  Yamato Asakura ,  Katsumi Ohsumi ,  Kenichi Ito ,  Noriyuki Ohnaka ,  Naohito Uetake ,  Motohiro Aizawa ,  Akira Ichimura

发明人： Kouichi Yamane ,  Yamato Asakura ,  Katsumi Ohsumi ,  Kenichi Ito ,  Noriyuki Ohnaka ,  Naohito Uetake ,  Motohiro Aizawa ,  Akira Ichimura

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

CPC分类号： G21C19/307 ,  G21Y2002/103 ,  G21Y2002/303 ,  G21Y2004/40

摘要： A reactor water clean-up system is provided with a first filter demineralizer having a filter resin containing an alkali substance and a second filter demineralizer with a filter resin not containing an alkali substance. The reactor water is supplied to the first filter demineralizer during the term from the starting operation of the preoperating test of the nuclear reactor and of each fuel cycle to 2000 EFPH. The alkali substance contained in the filter resin is guided into the nuclear reactor to change the pH of the reactor water in the nuclear reactor to the weak alkali side. The Cr quantity which is taken in the oxide film of the fuel cladding tube surface is reduced. After 2000 EFPH from the starting operation, the supply of the reactor water to the first filter demineralizer is stopped, and then, the reactor water is supplied to the second filter demineralizer.

摘要翻译： 反应器水净化系统设有具有含有碱性物质的过滤树脂的第一过滤器软化器和具有不含碱性物质的过滤树脂的第二过滤器软化器。 在从核反应堆的初步试验和每个燃料循环的启动操作到2000年的EFPH期间，将反应器水供应到第一过滤器软化器。 包含在过滤树脂中的碱性物质被引导到核反应堆中以将核反应堆中的反应器水的pH改变为弱碱侧。 在燃料包壳管表面的氧化膜中摄取的Cr量减少。 从启动操作开始2000次EFPH之后，停止向第一过滤脱盐装置供应反应器水，然后将反应器水供给到第二过滤器脱盐装置。

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：US5084235A

公开(公告)日：1992-01-28

申请号：US554158

申请日：1990-07-19

申请人： Eishi Ibe ,  Hidetoshi Karasawa ,  Maroto Nagase ,  Masaharu Sakagami ,  Shunsuke Uchida ,  Minoru Miki ,  Yamato Asakura ,  Motoaki Utamura ,  Fumio Kawamura ,  Katsumi Ohsumi ,  Yoshinori Chiba

发明人： Eishi Ibe ,  Hidetoshi Karasawa ,  Maroto Nagase ,  Masaharu Sakagami ,  Shunsuke Uchida ,  Minoru Miki ,  Yamato Asakura ,  Motoaki Utamura ,  Fumio Kawamura ,  Katsumi Ohsumi ,  Yoshinori Chiba

IPC分类号： G21C1/08 ,  G21C19/30

CPC分类号： G21C19/30 ,  G21C1/084 ,  Y02E30/31

摘要： A direct cycle type atomic power plant provided with a means for suppressing transfer of radioactive nitrogen compounds generated by nuclear reaction in the core from the reactor water to steam, where an increase in the dose rate in the main steam system and the turbine system due to carry-over of radioactive nitrogen atom, .sup.16 N, generated in the core can be suppressed, and the radioactivity therein can be reduced.

摘要翻译： 一种直接循环型原子能发电厂，其设置有用于抑制由核反应堆中的核反应产生的放射性氮化合物从反应器水转移到蒸汽的装置，其中主蒸汽系统和涡轮系统中的剂量率由于 可以抑制在核心中产生的放射性氮原子16N的转移，并且可以降低其中的放射性。

公开(公告)号：US4853638A

公开(公告)日：1989-08-01

申请号：US141424

申请日：1988-01-07

申请人： Masao Endou ,  Yamato Asakura ,  Atsushi Watanabe ,  Masaharu Sakagami ,  Shunsuke Uchida ,  Makoto Nagase ,  Tsutomu Baba ,  Katsumi Ohsumi

发明人： Masao Endou ,  Yamato Asakura ,  Atsushi Watanabe ,  Masaharu Sakagami ,  Shunsuke Uchida ,  Makoto Nagase ,  Tsutomu Baba ,  Katsumi Ohsumi

IPC分类号： G01R27/22 ,  G01N17/02 ,  G01N27/02 ,  G01N27/06 ,  G01N27/26 ,  G01N33/18 ,  G21C17/02

CPC分类号： G01N27/06 ,  G01N33/18 ,  G01N33/182

摘要： Electric conductivities of an aqueous solution under measurement are measured at two or more different temperatures in a range To to Tn, and a relationship between the electrical conductivity and the temperatures is obtained. A solute substance in the aqueous solution is determined by applying this relationship against a known temperature and electrical conductivity relationship of an individual substance. A concentration of the determined substance is estimated by applying the electrical conductivity at the lowest temperature To to a known relationship between an electrical conductivity and a concentration at the same temperature To with respect to an individual substance.

公开(公告)号：US06487265B1

公开(公告)日：2002-11-26

申请号：US09610869

申请日：2000-07-06

申请人： Masato Nakamura ,  Yamato Asakura ,  Yoshiyuki Takamori ,  Kazuhiko Akamine ,  Katsumi Ohsumi ,  Masanori Sakai ,  Yoichi Wada

发明人： Masato Nakamura ,  Yamato Asakura ,  Yoshiyuki Takamori ,  Kazuhiko Akamine ,  Katsumi Ohsumi ,  Masanori Sakai ,  Yoichi Wada

IPC分类号： G21C900

CPC分类号： G21C17/0225 ,  G21Y2002/103

摘要： Surfaces of the structural components of a nuclear power plant exposed to reactor water are wetted with an electroless plating solution containing an electrical insulating substance. The electrical insulating substance has a high resistivity about 105 (100000) times those of the structural components of the nuclear power plant or above. A metal film containing the electrical insulating substance is formed on the surfaces of the structural components exposed to the reactor water by wetting the surfaces of the structural components with the electroless plating solution. Thus, the electrochemical corrosion potential of the structural components is reduced regardless of whether hydrogen is injected into the reactor water.

摘要翻译： 暴露于反应器水的核电厂的结构部件的表面用含有电绝缘物质的化学镀溶液润湿。 电绝缘物质的电阻率高达核电站或以上的结构部件的105（100000）倍。 通过用化学镀溶液润湿结构部件的表面，在暴露于反应器水的结构部件的表面上形成含有电绝缘物质的金属膜。 因此，无论将氢气注入反应器水中，结构组分的电化学腐蚀电位都降低。

公开(公告)号：US5398268A

公开(公告)日：1995-03-14

申请号：US960847

申请日：1992-10-14

申请人： Hidefumi Ibe ,  Masanori Takahashi ,  Yasuko Aoki ,  Yamato Asakura ,  Makoto Nagase ,  Noriyuki Ohnaka ,  Masanori Sakai ,  Takashi Saito ,  Katsumi Ohsumi ,  Kazuhiko Akamine ,  Makoto Hayashi ,  Kiyotomo Nakata

发明人： Hidefumi Ibe ,  Masanori Takahashi ,  Yasuko Aoki ,  Yamato Asakura ,  Makoto Nagase ,  Noriyuki Ohnaka ,  Masanori Sakai ,  Takashi Saito ,  Katsumi Ohsumi ,  Kazuhiko Akamine ,  Makoto Hayashi ,  Kiyotomo Nakata

IPC分类号： G21C17/02 ,  G21C17/022 ,  G21D1/00 ,  G21D3/08 ,  G21C9/00

CPC分类号： G21C17/0225 ,  G21C17/022 ,  G21Y2002/304 ,  G21Y2004/40

摘要： A water chemistry factor which is specific to a specific portion of a primary cooling system and universal is decided to be a standard target. The concentration of an agent for mitigating corrosion damage of structural material of the primary cooling system is controlled so that the target will be in a desirable range. All sensor groups provided in the primary cooling system are separated into sensor groups in different lines, of which a specific sensor group are connected to an arithmetic unit and a data base and are for always monitoring a plant process. For example, concentration distribution agreed with measured value oxidation component in the reactor water at the measurement points is selected from the data base, and it is used to estimate the standard target.

摘要翻译： 特定于主冷却系统和通用特定部分的水化学因子决定为标准目标。 减轻主冷却系统结构材料的腐蚀损伤的试剂的浓度被控制，使得靶在期望的范围内。 主冷却系统中提供的所有传感器组分为不同的传感器组，其中特定传感器组连接到算术单元和数据库，并用于始终监测工厂过程。 例如，从数据库中选择测量点的反应堆水中测量值氧化成分的浓度分布，并用于估计标准目标。

公开(公告)号：US4894202A

公开(公告)日：1990-01-16

申请号：US103705

申请日：1987-10-02

申请人： Makoto Nagase ,  Yamato Asakura ,  Hidetoshi Karasawa ,  Masaharu Sakagami ,  Shunsuke Uchida ,  Toshio Sawa ,  Katsumi Ohsumi

发明人： Makoto Nagase ,  Yamato Asakura ,  Hidetoshi Karasawa ,  Masaharu Sakagami ,  Shunsuke Uchida ,  Toshio Sawa ,  Katsumi Ohsumi

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

CPC分类号： G21C17/0225

摘要： Disclosed is a method and apparatus for inhibiting radioactive substances eluting into cooling water of a nuclear plant. The method uses an index consisting of an amount of iron adhered onto the fuel cladding surface, that is calculated from the iron concentration of the cooling water and the operation time. A formation of a layer of the iron oxide on the fuel cladding surface is confirmed based upon the covering ratio of 100%. When the covering ratio is smaller than 100%, the iron concentration in the cooling water is controlled to remain constant at a maximum concentration. The Fe/Ni molar concentration ratio in the cooling water is adjusted to be set from about 2 to 10 after the layer of iron oxide reaches a covering ratio of 100%. .sup.58 Co ion and .sup.60 Co ion concentrations in the cooling water can be decreased without greatly increasing the concentration of precipitating radioactive crud, and the surface dosage in the primary system can be decreased at the time of regular checking.

摘要翻译： 公开了一种抑制放射性物质洗脱到核电厂冷却水中的方法和装置。 该方法使用由附着在燃料包覆表面上的铁量组成的指数，其由冷却水的铁浓度和操作时间计算。 基于100％的覆盖率确认燃料包覆面上的氧化铁层的形成。 当覆盖率小于100％时，冷却水中的铁浓度被控制为保持恒定在最大浓度。 在氧化铁层达到100％的覆盖率之后，将冷却水中的Fe / Ni摩尔浓度比调整为约2〜10。 可以降低冷却水中的58Co离子和60Co离子浓度，而不会大大增加沉淀放射性碎屑的浓度，并且在定期检查时可以减少初级体系中的表面剂量。