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    • 3. 发明专利
    • Nuclear power plant, fuel assembly and method for reducing radiation exposure in nuclear power plant
    • 核电厂,燃料组件和减少核电厂辐射暴露的方法
    • JP2009229388A
    • 2009-10-08
    • JP2008077905
    • 2008-03-25
    • Hitachi-Ge Nuclear Energy Ltd日立Geニュークリア・エナジー株式会社
    • ISHIDA KAZUNARIHOSOKAWA HIDEYUKIWADA YOICHIAIZAWA MOTOHIRONAGASE MAKOTOFUSE MOTOMASAUSUI NAOSHI
    • G21C3/06G21C19/307G21D1/00
    • Y02E30/40
    • PROBLEM TO BE SOLVED: To provide a method for reducing radiation exposure in a nuclear power plant which can further reduce radiation exposure even if the burnup of fuel assemblies is increased further.
      SOLUTION: A BWR plant 1 includes a core 4 loaded with fuel assemblies 5 and feedwater pipes 9 which are connected with a condenser 8 and a reactor pressure vessel (RPV)3 and where a hollow filter 10 is placed. The placement of the hollow filter 10 restrains the concentration of iron oxide in the feedwater supplied into the RPV 3 to 1×10
      -9 mol/kg or less. A ferrite coating is formed on the outside face of a cladding tube used for each fuel rod included in the fuel assemblies 5. Even if cobalt oxide in reactor water adheres to the ferrite coating, it is exfoliated from the outside face of the cladding tube through the agency of the electrostatic repulsive force generated between the cobalt oxide and triiron tetraoxide. This restrains nonradioactive cobalt from being activated on the outside face of the cladding tube and reduces the concentration of radioactive cobalt in the reactor water.
      COPYRIGHT: (C)2010,JPO&INPIT
    • 要解决的问题:提供一种减少核电站辐射暴露的方法,即使进一步增加燃料组件的燃耗,其也可以进一步减少辐射暴露。 解决方案:BWR设备1包括装载有与冷凝器8和反应堆压力容器(RPV)3连接的中空过滤器10的燃料组件5和给水管9的堆芯4。 中空过滤器10的放置将供给到RPV 3的给水中的氧化铁的浓度抑制在1×10 -6 / 10 -6 mol / kg以下。 在包含在燃料组件5中的每个燃料棒的包层管的外表面上形成铁素体涂层。即使反应器水中的氧化钴与铁素体涂层粘合,也从包覆管的外表面剥离通过 在氧化钴和四氧化三铁之间产生静电排斥力的机构。 这抑制了非放射性钴在包层管的外表面上被活化,并降低了反应器水中的放射性钴的浓度。 版权所有(C)2010,JPO&INPIT
    • 4. 发明专利
    • Method for reducing radiation exposure in nuclear power plant, nuclear power plant and fuel assembly
    • 核电厂,核电厂和燃料装置减少辐射暴露的方法
    • JP2011047960A
    • 2011-03-10
    • JP2010271384
    • 2010-12-06
    • Hitachi-Ge Nuclear Energy Ltd日立Geニュークリア・エナジー株式会社
    • ISHIDA KAZUNARIHOSOKAWA HIDEYUKIWADA YOICHIAIZAWA MOTOHIRONAGASE MAKOTOFUSE MOTOMASAUSUI NAOSHI
    • G21C3/06G21D1/00
    • Y02E30/40
    • PROBLEM TO BE SOLVED: To provide a method for reducing radiation exposure in a nuclear power plant which can further reduce radiation exposure, even when the degree of burnup of fuel assemblies is further increased. SOLUTION: A BWR plant 1 includes a core 4 loaded with fuel assemblies 5, and feed-water pipes 9 which are connected to a condenser 8 and a reactor pressure vessel (RPV)3 and where a hollow filter 10 is placed. The placement of the hollow filter 10 restrains the concentration of iron oxide in the feed-water supplied into the RPV 3 to 1×10 -9 mol/kg or less. A ferrite coating is formed on the outside face of a clad tube used for each fuel rod included in the fuel assemblies 5, before the core 4 is loaded with the fuel assemblies. Cobalt oxide in reactor water adhered to the ferrite coating is exfoliated from the outside face of the cladding tube by the electrostatic repulsive force generated between the cobalt oxide and triiron tetraoxide contained in the ferrite coating. For this reason, nonradioactive cobalt is restrained from activation on the outside face of the clad tube and reduces the concentration of radioactive cobalt in the reactor water. COPYRIGHT: (C)2011,JPO&INPIT
    • 要解决的问题:即使当燃料组件的燃耗程度进一步提高时,提供一种可以进一步减少辐射暴露的减少核电站辐射暴露的方法。 解决方案:BWR设备1包括装载有燃料组件5的核心4和连接到冷凝器8和反应堆压力容器(RPV)3并且其中放置中空过滤器10的给水管9。 中空过滤器10的放置将供给到RPV 3的供给水中的氧化铁的浓度抑制到1×10 -6 SPO / kg以下。 在核心4装载燃料组件之前,在包括在燃料组件5中的每个燃料棒的包覆管的外表面上形成铁氧体涂层。 在铁氧体涂层中包含的钴氧化物和四氧化三铁之间产生的静电排斥力使附着在铁素体涂层上的反应器水中的氧化钴从包覆管的外表面剥离。 因此,在放电管的外表面抑制非放射性钴的活化,降低反应器水中的放射性钴的浓度。 版权所有(C)2011,JPO&INPIT
    • 5. 发明专利
    • Radiation exposure reducing method of boiling water nuclear power plant, and boiling water nuclear power plant
    • 水力发电厂锅炉辐射曝光减少方法及锅炉水核电厂
    • JP2009222584A
    • 2009-10-01
    • JP2008068047
    • 2008-03-17
    • Hitachi-Ge Nuclear Energy Ltd日立Geニュークリア・エナジー株式会社
    • ISHIDA KAZUNARIHOSOKAWA HIDEYUKIWADA YOICHIAIZAWA MOTOHIRONAGASE MAKOTOFUSE MOTOMASAUSUI NAOSHI
    • G21D3/08G21D1/00
    • Y02E30/40
    • PROBLEM TO BE SOLVED: To provide a radiation exposure reducing method of a boiling water nuclear power plant for reducing the radiation exposure even when the burnup of a fuel assembly is further increased.
      SOLUTION: This BWR plant 1 is provided with: an RPV3; a feed water pipe 8; and an inorganic oxide particle injection apparatus 25. A main steam pipe 5 connects the RPV3 to a turbine 6. The feed water pipe 8 having a condensation filter 9 connects the RPV3 to a condenser 7. The inorganic oxide particle injection apparatus 25 is connected to the feed water pipe 8. The concentration of iron oxide of water supplied to the RPV3 is suppressed to 1×10
      -9 mol/kg or lower by a hollow filter as the condensation filter 9. Suspension of anatase type titanic oxide particles is injected to the feed water in the feed water pipe 8 through an injection pipe 21 from an inorganic oxide particle tank 19 of the inorganic oxide particle injection apparatus 25. The titanic oxide particles are hydrophilic, and adsorb cobalt contained in reactor water.
      COPYRIGHT: (C)2010,JPO&INPIT
    • 要解决的问题:即使当燃料组件的燃耗进一步增加时,提供一种用于减少辐射暴露的沸水核电站的辐射曝光降低方法。 解决方案:该BWR设备1具有:RPV3; 给水管8; 和无机氧化物粒子注入装置25.主蒸汽管5将RPV3连接到涡轮6.具有冷凝过滤器9的给水管8将RPV3连接到冷凝器7.无机氧化物粒子注入装置25连接到 给水管8.通过作为冷凝过滤器9的中空过滤器,供给到RPV3的水的氧化铁浓度被抑制到1×10 -9 mol / kg以下。锐钛矿的悬浮液 型氧化钛粒子通过来自无机氧化物粒子注入装置25的无机氧化物粒子罐19的注入管21注入给水管8中的给水。氧化钛粒子是亲水性的,并且吸附反应器中所含的钴 水。 版权所有(C)2010,JPO&INPIT
    • 6. 发明专利
    • Adhesion control method of radionuclide on component member of nuclear power plant and film forming method
    • 核电厂组件成员和成膜方法中放射性核素的粘合控制方法
    • JP2008209418A
    • 2008-09-11
    • JP2008112467
    • 2008-04-23
    • Hitachi-Ge Nuclear Energy Ltd日立Geニュークリア・エナジー株式会社
    • HOSOKAWA HIDEYUKINAGASE MAKOTOISHIDA KAZUNARIWADA YOICHIUSUI NAOSHIAIZAWA MOTOHIROFUSE MOTOMASA
    • G21D3/08G21D1/00
    • Y02E30/40
    • PROBLEM TO BE SOLVED: To provide a method for effectively suppressing adhesion of radionuclides on a component member of a nuclear power plant and reducing the waste quantity of ion-exchange resin used for waste fluid treatment after forming a ferrite film. SOLUTION: A process fluid which includes an organic acid (formic acid) having iron (II) ion or iron for forming iron (II) ion dissolved therein, an oxidizer (hydrogen peroxide) for oxidizing the iron (II) ion to iron (III) ion, and a pH adjuster (hydrazine), and is adjusted to pH 5.5-9.0 is brought into contact with a surface of a metallic member constituting the nuclear power plant to make the surface adsorb the iron (II) ion. The adsorbed iron (II) ion is oxidized in a temperature condition of 20-200°C to form a ferrite film on the surface of the metallic member. After the formation of the ferrite film is completed, the pH adjuster and organic acid contained in the process fluid used for the formation of the ferrite film are decomposed using a decomposition device to which an oxidizer is supplied. COPYRIGHT: (C)2008,JPO&INPIT
    • 要解决的问题:提供一种有效地抑制放射性核素在核电站的部件上的粘附的方法,并减少在形成铁氧体膜之后用于废流体处理的离子交换树脂的浪费量。 解决方案:一种工艺流体,其包括具有铁(II)离子的有机酸(甲酸)或用于形成其中溶解铁(II))的铁,用于氧化铁(II)离子的氧化剂(过氧化氢)至 铁(III)离子和pH调节剂(肼),并且调节至pH 5.5-9.0与构成核电站的金属构件的表面接触以使表面吸附铁(II)离子。 吸附的铁(II)离子在20-200℃的温度条件下被氧化,以在金属构件的表面上形成铁氧体膜。 在完成铁氧体膜的形成之后,用于形成铁氧体膜的工艺流体中所含的pH调节剂和有机酸用供给氧化剂的分解装置分解。 版权所有(C)2008,JPO&INPIT
    • 7. 发明专利
    • Method for reducing dose of nuclear power plant component member
    • 减少核电厂组件成员数量的方法
    • JP2011149764A
    • 2011-08-04
    • JP2010010053
    • 2010-01-20
    • Hitachi-Ge Nuclear Energy Ltd日立Geニュークリア・エナジー株式会社
    • HOSOKAWA HIDEYUKIITO TAKESHIHIRAMA YUKIONAGASE MAKOTOSAKASHITA MOTOAKIUSUI NAOSHIFUSE MOTOMASA
    • G21D3/08G21D1/00
    • Y02E30/40
    • PROBLEM TO BE SOLVED: To provide a method for reducing a dose of a nuclear power plant component member, capable of further inhibiting incorporation of a radionuclide into a ferrite film.
      SOLUTION: While a nuclear power plant is being suspended, a film forming device is connected to recirculation system piping in which a film is to be formed, and a film forming aqueous solution, in which pH containing iron (II) ions, hydrogen peroxide, and hydrazine is within a range of 5.5-9.0, issupplied from the film forming device to the recirculation system piping, thereby forming the ferrite film on an inner surface of the recirculation system piping. The film forming device is removed from the recirculation system piping and a nuclear reactor is started. When a reactor water temperature has reached a rated temperature in a temperature increase and pressure increase process, reactor operation is continued for 500 hours with no hydrogen injected. When this is done, the reactor water containing an oxidizing chemical species generated by a radiolysis of the reactor water comes into contact with a surface of the ferrite film on the inner surface of the recirculation system piping and forms a hematite film on the surface of the ferrite film.
      COPYRIGHT: (C)2011,JPO&INPIT
    • 要解决的问题:提供能够进一步抑制放射性核素掺入到铁氧体膜中的用于减少核电站部件的剂量的方法。 解决方案:在核电站正在悬挂的同时,将成膜装置连接到要形成膜的再循环系统管道,以及含有铁(II)离子的pH的成膜水溶液, 过氧化氢和肼在5.5​​-9.0的范围内,从成膜装置向再循环系统配管供给,从而在再循环系统管道的内表面上形成铁氧体膜。 成膜装置从循环系统管道中取出,并启动核反应堆。 当反应堆水温在升温和升压过程中达到额定温度时,反应器运行持续500小时,无氢气注入。 当这样做时,含有通过反应器水的放射分解产生的氧化性物质的反应器水与循环系统管道的内表面上的铁氧体膜的表面接触,并在该表面上形成赤铁矿膜 铁氧体膜。 版权所有(C)2011,JPO&INPIT
    • 9. 发明专利
    • Method of reducing doses in nuclear power plant constituting members
    • 在核电厂构成成员中减少剂量的方法
    • JP2014130160A
    • 2014-07-10
    • JP2014059665
    • 2014-03-24
    • Hitachi-Ge Nuclear Energy Ltd日立Geニュークリア・エナジー株式会社
    • HOSOKAWA HIDEYUKIITO TAKESHIHIRAMA YUKIONAGASE MAKOTOSAKASHITA MOTOAKIUSUI NAOSHIFUSE MOTOMASA
    • G21D1/00G21D3/08
    • Y02E30/40
    • PROBLEM TO BE SOLVED: To provide a method of reducing doses in nuclear power plant constituting members that can further restrain a radioactive nuclide from being taken in a ferrite film.SOLUTION: During a period in which a nuclear power plant does not operate, a film formation device is connected to recycle system piping on which a film is to be formed, and a film formation solution having a pH within a range from 5.5 to 9.0 that contains an iron(II) ion, a hydrogen peroxide, and a hydrazine is supplied from the film formation device to a recycle system piping. A ferrite film is thereby formed on the inner face of the recycle system piping. The film formation device is detached from the recycle system piping and a nuclear reactor is started. When the temperature of reactor water reaches a rated temperature in a heating and pressurizing process, the nuclear reactor is caused to continue operating for 500 hours without injecting a hydrogen. At this point, reactor water having a corrosion potential within a range from -0.2 V to 0.2 V is brought into contact with the surface of the ferrite film to form a hematite film on the surface of the ferrite film.
    • 要解决的问题:提供一种可以进一步抑制放射性核素吸收在铁素体膜中的核电站构成构件的剂量减少的方法。解决方案:在核电站不工作的期间, 形成装置连接到要在其上形成膜的再循环系统管道,并且提供含有铁(II)离子,过氧化氢和肼的pH在5.5至9.0范围内的成膜溶液 从成膜装置到再循环系统管道。 由此,在循环系统配管的内面形成铁氧体膜。 成膜装置与循环系统管道分离,并启动核反应堆。 当反应器水的温度在加热和加压过程中达到额定温度时,使核反应堆在不注入氢气的情况下继续运行500小时。 此时,腐蚀电位在-0.2V〜0.2V的范围内的反应器水与铁素体膜的表面接触,在铁氧体膜的表面形成赤铁矿膜。
    • 10. 发明专利
    • Boiling water nuclear power plant
    • 锅炉水核电厂
    • JP2011095280A
    • 2011-05-12
    • JP2011032819
    • 2011-02-18
    • Hitachi-Ge Nuclear Energy Ltd日立Geニュークリア・エナジー株式会社
    • ISHIDA KAZUNARIHOSOKAWA HIDEYUKIWADA YOICHIAIZAWA MOTOHIRONAGASE MAKOTOFUSE MOTOMASAUSUI NAOSHI
    • G21D1/00G21D3/08
    • Y02E30/40
    • PROBLEM TO BE SOLVED: To provide a radiation exposure reduction method of a boiling water nuclear power plant capable of reducing radiation exposure, even when increasing furthermore burn-up of a fuel assembly.
      SOLUTION: This BWR plant 1 includes RPV 3, a water supply pipe 8, and an inorganic oxide particle injection device 25. A main steam pipe 5 connects the RPV 3 to a turbine 6. The water supply pipe 8 provided with a condensation filter 9 connects the RPV 3 to a condenser 7. The inorganic oxide particle injection device 25 is connected to the water supply pipe 8. The concentration of iron oxides in supply water supplied to the RPV 3 is suppressed below 1×10
      -9 mol/kg by a hollow fiber filter which is the condensation filter 9. A collection device for collecting hydrophilic inorganic oxide particles is provided in a purification system pipe in a reactor purification system. The hydrophilic inorganic oxide particles having lowered cobalt adsorption performance are removed by the collection device.
      COPYRIGHT: (C)2011,JPO&INPIT
    • 要解决的问题:即使当燃料组件进一步燃烧时,提供能够减少辐射暴露的沸水核电站的辐射曝光降低方法。 解决方案:该BWR设备1包括RPV 3,供水管8和无机氧化物颗粒注入装置25.主蒸汽管5将RPV 3连接到涡轮6.供水管8设有 冷凝过滤器9将RPV 3连接到冷凝器7.无机氧化物粒子注入装置25与供水管8连接。供给到RPV 3的供给水中的氧化铁的浓度被抑制在1×10 < -9 mol / kg。在反应器净化系统的净化系统管道中设置有用于收集亲水性无机氧化物颗粒的收集装置。 通过收集装置除去具有降低的钴吸附性能的亲水性无机氧化物颗粒。 版权所有(C)2011,JPO&INPIT