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21. 发明专利

JPH11153695A IRON INJECTION METHOD AND DEVICE FOR REACTOR POWER PLANT 失效
公开(公告)号：JPH11153695A
公开(公告)日：1999-06-08
申请号：JP31848297
申请日：1997-11-19
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： MOCHIZUKI KENTA , ASAKURA YAMATO , AIZAWA MOTOHIRO , ISHIDA KAZUNARI , UETAKE NAOTO
IPC分类号： G21D3/08
摘要： PROBLEM TO BE SOLVED: To prevent the grain size of crud from growing larger and reduce the fraction eluding of Ni and Co as complex oxides in the reactor, by forming a plurality of tanks for oxidizing where Fe ion is oxidized and Fe crud is produced, and forming the tanks so that Fe ion oxidizing function is higher in more downstream of flow of Fe ion-containing water. SOLUTION: Demineralized water is supplied into a CO2 gas injection tank 19 and after its conductance is raised, it is sent to an electrolysis tank 20 of iron. In the electrolysis tank 20 of iron, by electrolyzing an iron plate electrode 36 placed in parallel, Fe ion eludes in electrolyte solution. From the lower part of the electrolysis tank 20, inert gas (N2 Ar) is sent in. The electrolyte solution containing Fe ion is supplied to a tank 21 for oxidizing and nitrogen gas and air are injected to secondly oxidize. Oxygen is injected in tank 23 to the crud-containing water having passed the tank 22 and all Fe ion at this moment is made to crud as trivalent iron.

22. 发明专利

JPH10142363A FUEL ROD AND ITS MANUFACTURING METHOD 失效
公开(公告)号：JPH10142363A
公开(公告)日：1998-05-29
申请号：JP29481096
申请日：1996-11-07
申请人： HITACHI LTD , HITACHI NUCLEAR ENG
发明人： UETAKE NAOTO , ISHIDA KAZUNARI , KONDO MASAYOSHI , HOSOKAWA HIDEYUKI , ASAKURA YAMATO , YASUDA TAKAYOSHI
IPC分类号： G21C3/06 , C25D11/00 , G21C20060101 , G21C3/07 , G21C3/20 , G21C3/30 , G21C21/02
摘要： PROBLEM TO BE SOLVED: To immobilize a radioactive substance in reactor water without increasing a manufacturing cost by forming an oxide film on the outer surface of a cladding tube under conditions where a specific DC voltage is applied in the electrolyte of neutral salt. SOLUTION: A metal frame 13 where a plurality of cladding tubes 1 are arranged is suspended in a conductive anode oxide bath 10 with an electrolyte 11 containing, for example, 0.1% boric acid ammonium. The upper edge of the covering pipe 1 is connected to the metal frame 13, and a watertight plastic plug 14 is provided at the lower edge of the cladding tube 1. For example, a 300V DC voltage is applied to the cladding tube 1 for five minutes that is an anode, thus performing the anode oxidation of the outer surface of the cladding tube 1. After the anode oxidation, the cladding tube 1 is withdrawn from the anode oxide bath 10 and is washed before shifting to an edge part cutting process. Although a part without any oxide film is formed at the upper edge part of the cladding tube 1 by this method, the area of this part is small, so that the function for immobilizing a radioactive substance in a reactor water onto the outer surface of the cladding tube 1 can be obtained fully.

23. 发明专利

JPH09257992A NUCLEAR POWER PLANT AND HYDROGEN PEROXIDE DECOMPOSING DEVICE, AND INSPECTION WORK METHOD OF NUCLEAR POWER PLANT 失效
公开(公告)号：JPH09257992A
公开(公告)日：1997-10-03
申请号：JP6417496
申请日：1996-03-21
申请人： HITACHI LTD
发明人： ISHIDA KAZUNARI , KONDO MASAYOSHI , UETAKE NAOTO , ASAKURA YAMATO
IPC分类号： G21D3/00 , B01J23/40 , G21C19/307 , G21F9/12
摘要： PROBLEM TO BE SOLVED: To reduce the time for periodical inspection of nuclear reactor and various works in the reactor and prevent the performance of resin washing the water in the reactor form decreasing. SOLUTION: This plant is provided with a pressure vessel with nuclear fuel in a core, a nuclear reactor well 1, a condensate storing tank 2 storing condensate and a condensate purifier 3 and is formed such that nuclear reactor water is filled in the well 1 at the time of stop of nuclear reactor and after the completion of a specified inspection work the water is brought into the tank 2. In the tank 2, a hydrogen peroxide decomposition device 4 is set to decompose hydrogen peroxide in the water in the tank 2.

24. 发明专利

JP2007232433A Chimney of natural circulation type boiling water reactor 有权
标题翻译：自然循环型锅炉水反应器CHIMNEY
公开(公告)号：JP2007232433A
公开(公告)日：2007-09-13
申请号：JP2006051789
申请日：2006-02-28
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： WATANABE ATSUSHI , NISHIOKA EIJI , WADA YOICHI , NAGASE MAKOTO , ISHIDA KAZUNARI
IPC分类号： G21C15/02 , G21D1/00
CPC分类号： Y02E30/31
摘要： PROBLEM TO BE SOLVED: To provide a chimney of a natural circulation type boiling water reactor capable suppressing deterioration of a material, and simultaneously suppressing the waste amount when replacing it, by using a chimney having a simple shape, and by forming a part of the chimney from a highly corrosion-resistant metal.
SOLUTION: In this chimney 11, passages R wherein a coolant flows are formed by a chimney shell 11d built in a reactor pressure vessel. A plurality of pipes 11b forming each passage R of the coolant are disposed in the vertical direction in the chimney shell 11d. Each pipe 11b is arranged at a clearance L between a pipe 11b and a pipe 11b respectively, and at least a part or the whole thereof is formed from the highly corrosion-resistant metal.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供能够抑制材料劣化的自然循环型沸水反应器的烟囱，并且通过使用具有简单形状的烟囱同时抑制其更换时的废弃量，并且通过形成部分烟囱由高度耐腐蚀的金属制成。解决方案：在烟囱11中，冷却剂流动的通道R由内置在反应器压力容器中的烟囱壳11d形成。形成冷却剂的每个通道R的多个管11b在烟囱壳11d中沿垂直方向设置。每个管11b分别布置在管11b和管11b之间的间隙L处，并且至少一部分或全部由高耐腐蚀金属形成。版权所有（C）2007，JPO＆INPIT

25. 发明专利

JP2007232421A Natural circulation type boiling water reactor and its handling method 有权
标题翻译：自然循环型锅炉水反应器及其处理方法
公开(公告)号：JP2007232421A
公开(公告)日：2007-09-13
申请号：JP2006051501
申请日：2006-02-28
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： WATANABE ATSUSHI , WADA YOICHI , NAGASE MAKOTO , ISHIDA KAZUNARI , HOSOKAWA HIDEYUKI , HIROKAWA FUMIHITO , TSUBAKI MASAAKI , TAKAHASHI SHIRO
IPC分类号： G21C5/00 , G21C15/02
CPC分类号： G21C1/084 , G21C15/00 , G21Y2002/402 , G21Y2004/30 , Y02E30/31
摘要： PROBLEM TO BE SOLVED: To provide a natural circulation type boiling water reactor equipped with a chimney easily dismountable from a reactor pressure vessel, capable of reducing welded zones compared with the chimney of a conventional natural circulation type boiling water reactor.
SOLUTION: In this natural circulation type boiling water reactor 1, a plurality of square tubes 11b constitute the chimney 11. Namely, each of the plurality of square tubes 11b partitions each passage of a coolant over the core. Therefore, in the chimney 11 of the natural circulation type boiling water reactor 1, welded zones can be reduced, because each edge of four corners is not required to be welded in each passage, differently from the case wherein a coolant passage is partitioned by a plate material welded integrally such as a grid-like passage bulkhead in the conventional natural circulation type boiling water reactor.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种具有烟囱的自然循环型沸水反应器，该反应堆容易从反应堆压力容器中拆卸，与传统的自然循环型沸水反应器的烟囱相比，能够减少焊接区域。解决方案：在这种自然循环型沸水反应器1中，多个方管11b构成烟囱11.即，多个方管11b中的每一个分别在芯上通过冷却剂。因此，在自然循环式沸水堆1的烟囱11中，由于在每个通路中不需要焊接四个角的每个边缘，所以可以减少焊接区域，其中冷却剂通道被在常规的自然循环型沸水反应堆中整体焊接如栅格状通道隔板的板材。版权所有（C）2007，JPO＆INPIT

26. 发明专利

JP2007147453A Method and device for processing ammonia-containing regenerated waste solution from condensate demineralizer 审中-公开
标题翻译：用于处理含有氨的再生废物溶液的方法和装置
公开(公告)号：JP2007147453A
公开(公告)日：2007-06-14
申请号：JP2005342452
申请日：2005-11-28
申请人： Hitachi Ltd , Japan Atom Power Co Ltd:The , 日本原子力発電株式会社 , 株式会社日立製作所
发明人： AIZAWA MOTOHIRO , FUSE MOTOMASA , WADA YOICHI , ISHIDA KAZUNARI , KADOI HIDEKAZU , NAGATA NOBUAKI , SHIMADA KEIJI
IPC分类号： G21C19/307 , B01D19/00 , B01J23/42 , B01J23/86 , C02F1/04 , C02F1/20 , C02F1/44 , C02F1/469 , G21D1/02
CPC分类号： Y02A20/128 , Y02A20/131 , Y02E30/40
摘要： PROBLEM TO BE SOLVED: To provide a method for reducing the quantity of radioactive waste produced, by effectively removing ammonia in a regenerated waste solution, in processing the regenerated waste solution coming from a demineralizer of a nuclear power plant.
SOLUTION: The processing method for the ammonia-containing regenerated waste solution discharged when a condensate demineralizer of the nuclear power plant is regenerated comprises the steps of alkalizing the used ammonia-containing regenerated waste solution discharged, blowing air under a heating condition to separate ammonia in vapor phase and decomposing the ammonia gas obtained in the previous step by using a catalyst.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种通过有效地除去再生废液中的氨来减少产生的放射性废物的量的方法，用于处理来自核电站的脱盐装置的再生废液。解决方案：在再生核电站的冷凝水脱盐装置时排出的含氨废水再生废液的处理方法包括将排出的废氨水再生废液碱化，在加热条件下吹入空气的步骤为分离出气相中的氨，并通过使用催化剂分解前一步中得到的氨气。版权所有（C）2007，JPO＆INPIT

27. 发明专利

JP2006201000A Stress corrosion crack alleviating method and apparatus 有权
标题翻译：应力腐蚀破坏方法和装置
公开(公告)号：JP2006201000A
公开(公告)日：2006-08-03
申请号：JP2005012222
申请日：2005-01-20
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： WADA YOICHI , ISHIDA KAZUNARI , TACHIBANA MASAHIKO , AIZAWA MOTOHIRO , SATAKE MASATOSHI
IPC分类号： G21D3/08 , G21C19/307 , G21D1/00
CPC分类号： Y02E30/40
摘要： PROBLEM TO BE SOLVED: To provide a method of extracting stress corrosion crack suppressing effect by hydrazine as much as possible by lowering the concentration of nitric acid and nitrous acid produced when a nitrogen compound such as ammonia produced by reaction of hydrazine with oxygen and hydrogen peroxide is further oxidized with reactor water.
SOLUTION: In a boiling water reactor into which at least one reducing agent is injected, a reducing agent injection unit having one of the function of transmitting a signal indicating the state of injecting the reducing agent and the function of receiving a signal transmitted by another reducing agent injection unit and indicating the state of injecting the reducing agent or both of the functions is employed as a device for injecting the reducing agent.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种通过降低当肼与氧反应产生的氮化合物如氨产生的硝酸和亚硝酸的浓度时尽可能多地提取肼的应力腐蚀裂纹抑制效果的方法并用反应器水进一步氧化过氧化氢。解决方案：在其中注入至少一种还原剂的沸水反应器中，具有发送指示注入还原剂的状态的信号的功能之一的还原剂注入单元和接收传输的信号的功能通过另一种还原剂注入单元并指示注入还原剂的状态或两者的功能被用作注入还原剂的装置。版权所有（C）2006，JPO＆NCIPI

28. 发明专利

JP2005291815A Corrosion thinning prevention method of carbon steel 有权
标题翻译：碳钢的腐蚀性预防方法
公开(公告)号：JP2005291815A
公开(公告)日：2005-10-20
申请号：JP2004104882
申请日：2004-03-31
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： WADA YOICHI , ISHIDA KAZUNARI , TACHIBANA MASAHIKO , AIZAWA MOTOHIRO , NAKAMURA MASAHITO
IPC分类号： G21C19/307 , G21D1/00 , G21D3/08
CPC分类号： Y02E30/40
摘要： PROBLEM TO BE SOLVED: To suppress fluidization accelerated corrosion of a carbon steel constituting a pipe system, when injecting a reducing nitrogen compound into a water flowing pipe system of a nuclear power plant.
SOLUTION: When the reducing nitrogen compound such as hydrazine 122 is injected into flowing water in carbon steel pipes 106, 110 in order to suppress stress corrosion crack of a structure material of a core 128 or the like of a nuclear reactor, an oxidizing agent such as oxygen 126 injected originally for suppressing the fluidization accelerated corrosion of the carbon steel is consumed by the hydrazine 122 or the like, to thereby generate the fluidization accelerated corrosion. As the countermeasure therefor, the oxidizing agent 127 of the quantity corresponding to the injection quantity of the reducing nitrogen compound such as hydrazine is injected into the pipes, and thereby the concentration of oxygen or the like in the pipes is maintained at a prescribed value, to thereby suppress the fluidization accelerated corrosion of the carbon steel.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：当将还原性氮化合物注入到核电站的水流管道系统中时，抑制构成管道系统的碳钢的流化加速腐蚀。解决方案：为了抑制核反应堆芯128等的结构材料的应力腐蚀开裂，将碳125等还原性氮化合物注入碳钢管106,110的流水中时，最初为了抑制碳钢的流化加速腐蚀而引入的氧气等氧化剂126被肼122等消耗，从而产生流化加速腐蚀。作为对策，将与肼等还原性氮化合物的喷射量对应的量的氧化剂127注入管内，由此将管内氧等的浓度维持在规定值，从而抑制碳钢的流化加速腐蚀。版权所有（C）2006，JPO＆NCIPI

29. 发明专利

JP2003149385A NUCLEAR POWER PLANT AND ITS OPERATION METHOD 审中-公开
公开(公告)号：JP2003149385A
公开(公告)日：2003-05-21
申请号：JP2001344543
申请日：2001-11-09
申请人： HITACHI LTD , HITACHI KYOWA ENG CO LTD
发明人： NAKAMURA MASAHITO , AKAMINE KAZUHIKO , OSUMI KATSUMI , ISHIDA KAZUNARI , SUZUKI KAZUNOBU
IPC分类号： G21C19/307 , C02F1/46 , C02F1/62 , C02F1/72 , G21D3/08
摘要： PROBLEM TO BE SOLVED: To reduce radioactivity of reactor water. SOLUTION: An electrolyzation tower 27 for gradually electrolyzing iron with low current density (a current value per unit area of an iron plate electrode) of 0.02 A/cm or less and an iron feeding device composed of including an oxidizing tower 29A for oxidizing, by hydrogen peroxide, iron ions produced in the electrolyzation tower 27 and an iron crud thereafter turned into the crud are installed. The iron ions produced in the electrolyzation tower 27 and the iron crud thereafter turned into the crud are oxidized by hydrogen peroxide in the oxidizing tower 29A, and the iron ions and the iron crud thus oxidized are fed to a water feeding system of a nuclear reactor.

30. 发明专利

JP2003035797A Method for relaxing stress corrosion cracking of reactor structural member 审中-公开
标题翻译：放电应力腐蚀破坏反应器结构构件的方法
公开(公告)号：JP2003035797A
公开(公告)日：2003-02-07
申请号：JP2001223936
申请日：2001-07-25
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： WADA YOICHI , ISHIDA KAZUNARI , UETAKE NAOTO , AKAMINE KAZUHIKO , NAKAMURA MASAHITO , OSUMI KATSUMI
IPC分类号： G21D3/08 , G21D1/00
CPC分类号： Y02E30/40
摘要： PROBLEM TO BE SOLVED: To improve the adhesion property of elements of a platinum family to a reactor structural material and restrain the occurrence and development of stress corrosion cracking(SCC) of the reactor structural members in the injection of hydrogen. SOLUTION: The molar number of manganese in reactor water is set equal to or less than the sum of the molar numbers of precious metals such as platinum, rhodium and palladium or by injecting a manganese compound together with one or more precious metals mentioned above into the reactor water. The compound is injected during the time when the temperature of the reactor water lowers from 150 deg.C to 80 deg.C. The injected precious metals and manganese adhere to the surface of the reactor structural member. The action of manganese improves the adhesion efficiency of the precious metals and secures the adhesion to the region where it was difficult to adhere previously. The ECP is significantly lowered by supplying hydrogen to the reactor water in the operation of a reactor after the adhesion. Consequently, the effect for preventing SCC is improved better than ever.
摘要翻译：要解决的问题：为了提高铂族元素与反应堆结构材料的粘附性，并且抑制了注入氢气中反应堆结构构件的应力腐蚀开裂（SCC）的发生和发展。溶液：将反应器水中的锰的摩尔数设定为等于或小于贵金属如铂，铑和钯的摩尔数的总和，或者将锰化合物与上述一种或多种贵金属一起注入反应堆水。在反应器水的温度从150摄氏度到80摄氏度的时间期间注射化合物。注入的贵金属和锰附着在反应器结构件的表面上。锰的作用提高了贵金属的粘附效率，并且确保了粘附到先前难以粘合的区域上。通过在粘合后的反应器的操作中向反应器水供应氢，ECP显着降低。因此，防止SCC的效果比以往任何时候都好。

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