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：US4533514A

公开(公告)日：1985-08-06

申请号：US311886

申请日：1981-10-15

申请人： Michiyoshi Yamamoto ,  Katsumi Ohsumi ,  Shinji Mitani ,  Yoshie Takashima ,  Hiroo Igarashi

发明人： Michiyoshi Yamamoto ,  Katsumi Ohsumi ,  Shinji Mitani ,  Yoshie Takashima ,  Hiroo Igarashi

IPC分类号： G21D1/02 ,  G21C7/00 ,  G21C17/022 ,  G21C19/28 ,  G21D1/00 ,  G21D3/08 ,  G21C19/32

CPC分类号： G21C7/00 ,  G21C17/022 ,  G21C19/28 ,  G21Y2002/103 ,  G21Y2004/302 ,  G21Y2004/40 ,  Y02E30/39

摘要： Control rods are inserted into the core of a nuclear reactor in operation to shut down the reactor output. Before completion of entire control rod insertion, a high-temperature coolant flowing in piping for a reactor water clean-up system is sprayed into the space in the upper portion of the reactor vessel. As the space is under negative pressure, oxygen existing in the water droplets of the sprayed coolant is separated. After completion of entire control rod insertion, a residual heat removal system is operated. The spraying operation is discontinued and a low-temperature coolant cooled by a heat exchanger in the residual heat removal system is sprayed into said space. The coolant sprayed by said first spraying operation is not cooled by the heat exchanger in said residual heat removal system.

摘要翻译： 控制棒在操作中插入核反应堆的核心以关闭反应堆输出。 在整个控制棒插入完成之前，在反应堆水清洁系统的管道中流动的高温冷却剂被喷射到反应堆容器的上部的空间中。 当空间处于负压下时，喷射的冷却剂的水滴中存在的氧气被分离。 整个控制杆插入完成后，操作一个剩余的散热系统。 停止喷涂操作，并且将残留除热系统中的热交换器冷却的低温冷却剂喷射到所述空间中。 通过所述第一喷射操作喷射的冷却剂在所述剩余散热系统中不被所述热交换器冷却。

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：US5203984A

公开(公告)日：1993-04-20

申请号：US573780

申请日：1990-08-28

申请人： Masanori Sakai ,  Katsumi Mabuchi ,  Toshiaki Arato ,  Takuya Takahashi ,  Masakiyo Izumiya ,  Isao Masaoka ,  Yoshitaka Kojima ,  Masahisa Inagaki ,  Katsumi Ohsumi ,  Makoto Hayashi ,  Fumio Sato ,  Masateru Suwa ,  Kimihiko Akahori

发明人： Masanori Sakai ,  Katsumi Mabuchi ,  Toshiaki Arato ,  Takuya Takahashi ,  Masakiyo Izumiya ,  Isao Masaoka ,  Yoshitaka Kojima ,  Masahisa Inagaki ,  Katsumi Ohsumi ,  Makoto Hayashi ,  Fumio Sato ,  Masateru Suwa ,  Kimihiko Akahori

IPC分类号： G01N17/02 ,  G01N27/26 ,  G01N27/27 ,  G01N27/30 ,  G01N27/333 ,  G01N27/401 ,  G01N27/403 ,  G01N27/416 ,  G01N27/48 ,  G01N33/18 ,  G21C17/02 ,  G21C17/022

CPC分类号： G01N27/30 ,  G01N33/18 ,  G21C17/022 ,  Y10S706/906

摘要： A plant operational status monitoring supervisory system comprising; means for extracting information directly relating to water quality of an objective portion consecutively for a period of time by means of an electrochemical water quality sensor installed in an objective portion to monitor in-situ in a plant; means for evaluating water quality based on thus extracted information; means for comparing an obtained water quality evaluation result with a reference value for a predetermined plant operation procedure; and means for displaying or storing necessary portion out of said comparison results; is disclosed.An electrochemical reference electrode used in this system being provided with an electrolyte layer containing ion of the electrode member; a porous ceramic layer surrounding the same without permeating liquid; and electrode member electrochemically contacting with said elec-trolyte layer; and a terminal electrically contacting with said electrode member; and further having a long life in high temperature water, various status of high temperature water in objective portions and that of nearby constituent members in a plant are possible to be monitored online by means of this reference electrode.Further, because monitored data are processed by means of a neural network, the higher precision level of monitoring has been achieved.

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：US4764338A

公开(公告)日：1988-08-16

申请号：US705695

申请日：1985-02-26

申请人： Shunsuke Uchida ,  Katsumi Ohsumi

发明人： Shunsuke Uchida ,  Katsumi Ohsumi

IPC分类号： G21D3/08 ,  C23F15/00 ,  G21C19/28 ,  G21C19/307 ,  G21C19/30

CPC分类号： G21C19/307 ,  C23F15/00 ,  G21C19/28

摘要： In operation of a boiling water-type, atomic power plant, rated operation is conducted while adjusting the pH of core water in the nuclear reactor to 7.0 to 8.5 by adding an alkali thereto, thereby controlling dissolution of radioactive corrosion products attached to fuel rods into the core water. An increase in the radioactive corrosion products in the core water and in the dose rate can be prevented.

摘要翻译： 在沸水型原子能发电厂的运行中，通过向其中添加碱将核反应堆中的核心水的pH调节至7.0〜8.5进行额定运转，从而控制附着在燃料棒上的放射性腐蚀产物的溶解 核心水。 可以防止核心水中的放射性腐蚀产物的增加和剂量率的增加。

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：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：US4828790A

公开(公告)日：1989-05-09

申请号：US117492

申请日：1987-11-06

申请人： Takashi Honda ,  Yasumasa Furutani ,  Kenya Ohashi ,  Eiji Kashimura ,  Akira Minato ,  Katsumi Ohsumi ,  Hisao Itou

发明人： Takashi Honda ,  Yasumasa Furutani ,  Kenya Ohashi ,  Eiji Kashimura ,  Akira Minato ,  Katsumi Ohsumi ,  Hisao Itou

IPC分类号： G21F9/00

CPC分类号： G21F9/001 ,  G21F9/00

摘要： A nuclear power plant wherein surfaces of components contacting with nuclear reactor cooling water containing radioactive substances are coated with an oxide film, preferably being charged positively and/or containing chromium in an amount of 12% by weight or more, is prevented effectively from the deposition of radioactive substances thereon.

公开(公告)号：US4293382A

公开(公告)日：1981-10-06

申请号：US937863

申请日：1978-08-29

申请人： Katsumi Ohsumi ,  Minoru Miki

发明人： Katsumi Ohsumi ,  Minoru Miki

IPC分类号： G21D3/08 ,  G21C7/00 ,  G21C19/28 ,  G21C19/32

CPC分类号： G21C19/28 ,  G21C7/00 ,  G21Y2002/103 ,  G21Y2004/40 ,  Y02E30/39

摘要： At the time of starting up a nuclear reactor, the concentration of oxidizing substance in a cooling water in a reactor pressure vessel is decreased by evacuating the pressure vessel or replacing air in the vessel with an inert gas for a long time, below a predetermined level before the cooling water is heated to a temperature of 150.degree. C., thereby preventing the occurrence of stress corrosion cracking.

摘要翻译： 在启动核反应堆时，反应器压力容器中的冷却水中的氧化物质的浓度通过抽空压力容器或用惰性气体替换容器内的空气长时间，低于预定水平而降低 在将冷却水加热到150℃的温度之前，由此防止应力腐蚀开裂的发生。