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1.发明授权
公开(公告)号：US4722823A
公开(公告)日：1988-02-02
申请号：US525889
申请日：1983-08-24
IPC分类号： G21D1/00 , G21C13/087 , G21C13/10 , G21F9/00 , G21C11/00
CPC分类号： G21C13/087 , G21C13/10 , Y02E30/40
摘要： A nuclear power plant using a structural material consisting of metal which comes into contact with a liquid in which radioactive substances are dissolved has a function to suppress the deposition of the radioactive substances. In this function, metal elements constituting the surface layer of the structural material which comes into contact with the liquid are oxidized by injecting oxidizing agents from outside, thereby preliminarily producing an oxide film. The oxidizing agents comprise at least one kind selected from the group consisting of oxygen, hydrogen peroxide, chromate, nitrite, molybdate, tungstate and ferrate. Particularly, by suppressing the deposition of radioactive substances on a stainless steel, the dose rate of exposure of workers is effectively reduced.
摘要翻译： 使用与溶解有放射性物质的液体接触的金属构成的结构材料的核电站具有抑制放射性物质沉积的功能。 在该功能中，构成与液体接触的结构材料的表面层的金属元素通过从外部注入氧化剂而被氧化，从而预先生成氧化膜。 氧化剂包括选自氧，过氧化氢，铬酸盐，亚硝酸盐，钼酸盐，钨酸盐和高铁酸盐中的至少一种。 特别是通过抑制放射性物质在不锈钢上的沉积，有效地降低了工作人员的接触剂量。
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2.发明授权
公开(公告)号：US4564499A
公开(公告)日：1986-01-14
申请号：US666033
申请日：1984-10-29
CPC分类号： C23F15/00
摘要： A method of inhibiting corrosion of carbon steel piping of condensate and feed water systems in a power generating plant, characterized by continuing the water in said piping to flow after also said plant has been shut down until it is restarted up and by keeping the specific electric conductivity of flowing water at 0.5 .mu.S/cm or less.
摘要翻译： 一种抑制发电厂冷凝水和给水系统碳钢管道腐蚀的方法，其特征在于，所述管道中的水在所述设备已被关闭之后继续流动，直到其重新启动并且通过保持特定的电 流动水的电导率为0.5μS/ cm以下。
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3.发明授权
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
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.
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公开(公告)号：US4820473A
公开(公告)日：1989-04-11
申请号：US795466
申请日：1985-11-06
申请人： Kenya Ohashi , Takashi Honda , Yasumasa Furutani , Eizi Kashimura , Akira Minato , Katsumi Ohsumi
发明人： Kenya Ohashi , Takashi Honda , Yasumasa Furutani , Eizi Kashimura , Akira Minato , Katsumi Ohsumi
CPC分类号： G21C17/0225 , C23C8/10 , C23C8/16 , C23C8/18 , G21F9/004 , Y10S376/90
摘要： The present invention is concerned with a method of reducing radioactivity in a nuclear plant by preliminarily forming oxide films on the surfaces of metallic structural members to be in contact with high-temperature and high-pressure reactor water containing radioactive substances before said metallic members are exposed to said reactor water. The method is characterized by the steps of subjecting said structural members to a first-step oxidation treatment of heating said structural members in an environment of a high temperature, and further subjecting the thus treated structural members to a second step oxidation treatment of heating said treated structural members in an environment having a higher oxidizing capacity than that of said environment in said first-step oxidation treatment to form a denser oxide film than an oxide film obtained in said first step oxidation treatment. According to the present invention, radioactivity in the nuclear plant can be reduced remarkably.
摘要翻译： 本发明涉及通过在金属构件暴露之前预先形成金属结构构件的表面上的氧化物膜以与含有放射性物质的高温高压反应器水接触的方法来降低核电厂中的放射性的方法 到所述反应器水。 该方法的特征在于：在高温环境中对所述结构部件进行第一步氧化处理以加热所述结构部件，并进一步对经过处理的结构部件进行第二阶段氧化处理，加热所述处理过的 在所述第一步氧化处理中，氧化能力高于所述环境的环境中的结构体，以形成比在所述第一步骤氧化处理中获得的氧化膜更致密的氧化膜。 根据本发明，可以显着降低核电厂的放射性。
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5.发明授权Monitoring system for plant operation condition and its in-situ electrochemical electrode 失效植物营养条件监测系统及其现场电化学电极
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.
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6.发明授权
公开(公告)号：US4940564A
公开(公告)日：1990-07-10
申请号：US110454
申请日：1987-10-20
申请人： Motohiro Aizawa , Katsumi Ohsumi , Takashi Honda , Hisao Itow
发明人： Motohiro Aizawa , Katsumi Ohsumi , Takashi Honda , Hisao Itow
IPC分类号： G21D1/00 , G21C17/022 , G21C19/28 , G21D3/08
CPC分类号： G21C17/0225 , G21C19/28
摘要： In a boiling water-type, nuclear power plant, deposition of radioactive substances on the surfaces of out-of-core components in the primary cooling water system in the nuclear power plant is suppressed by injecting an alkaline element into reactor water in the presence of more than an amount of the oxygen formed by nuclear fission of the reactor water and dissolved in the reactor water, particularly without hydrogen gas injection, during the nuclear heatup operation period of a boiling water type, nuclear power plant and circulating the injected alkaline element through the primary cooling water system of a nuclear reactor, thereby forming an oxide film on the surfaces of out-of-core components in the primary cooling water system of the nuclear reactor. Exposure of plant personnel to radioactivity can be reduced thereby. The present boiling water-type, nuclear power plant is provided with a means for forming such oxide film.
摘要翻译： 在沸水型核电厂中，通过在碱性元素的存在下将碱性元素注入反应器水中来抑制放射性物质沉积在核电厂初级冷却水系统中的核心外部组分的表面上 在沸水型核电厂的核加热运行期间，通过反应器水的核裂变形成的氧气量多于溶解在反应器水中的气体，特别是不喷射氢气，并使注入的碱性元素循环通过 核反应堆的一级冷却水系统，从而在核反应堆的一级冷却水系统中的核心部件的表面上形成氧化膜。 因此可以减少植物人员暴露于放射性。 现在的沸水型核电厂设有形成这种氧化膜的方法。
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7.发明授权Direct cycle-type atomic power plant with means for suppressing transfer from a liquid phase to a vapor phase of radioactive nitrogen oxides 失效具有用于抑制从液相转移到放射性氮氧化物的气相的手段的直接循环型原子能发电厂
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
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。
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公开(公告)号：US4533514A
公开(公告)日：1985-08-06
申请号：US311886
申请日：1981-10-15
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。
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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
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。
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10.发明授权Water quality control method, and method and apparatus for measuring electrical conductivity used in the water quality control 失效水质控制方法以及用于测量水质控制中使用的电导率的方法和装置
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
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.
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