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41. 发明专利

JP2004117149A Method and device for electrolytic decontamination for waste material from reprocessing facility 审中-公开
公开(公告)号：JP2004117149A
公开(公告)日：2004-04-15
申请号：JP2002280693
申请日：2002-09-26
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： SAWA TOSHIO , KONDO YOSHIKAZU , UEDA KIYOTAKA
IPC分类号： G21F9/28 , C25D11/26 , C25F3/00
摘要： PROBLEM TO BE SOLVED: To provide a method and a device for the electrolytic decontamination which make it possible to efficiently and simultaneously decontaminate numerous objects to be decontaminated which are waste materials from reprocessing facilities such as end pieces of fuel cladding tubes and whose shapes are different. SOLUTION: A basket 4 made of a titanium material which can be uniformly energized so as to use numerous objects 1 to be decontaminated as anodes and is given a passivation treatment is used in an electrolytic cell 2, and cathodes 5 and 6 are set up on the outer periphery including the bottom and an upper part of the objects 1 to be decontaminated. Oxalic acid which has high solvency power and is excellent in electrical conductivity is used as a decontamination liquid. An ultrasonic vibrator 10 is located in the electrolytic cell 2 to intermittently facilitate the exfoliation of the attachment to the objects 1 to be decontaminated during electrolytic decontamination. Since the titanium basket 4 which is given the passivation treatment is used as an anode conductive material, the differentially-shaped objects to be decontaminated can be uniformly decontaminated through the electrolytic manipulation of the oxalic acid decontamination liquid without the work for electrically connecting the anode to each of the objects 1 to be decontaminated. The impartation of ultrasonic vibration during the electrolytic manipulation enables the decontamination for the back sides and intricately-shaped parts of the differentially-shaped objects 1 to be decontaminated. COPYRIGHT: (C)2004,JPO

42. 发明专利

JPH11258389A METHOD FOR MANUFACTURING WASTE OF SOLIDIFIED CHLORIDE 失效
公开(公告)号：JPH11258389A
公开(公告)日：1999-09-24
申请号：JP5769298
申请日：1998-03-10
申请人： HITACHI LTD , CENTRAL RES INST ELECT
发明人： ITO SHUICHI , SAWA TOSHIO , MATSUBARA CHIAKI , KOYAMA MASASHI
IPC分类号： G21C19/44 , G21F9/16
摘要： PROBLEM TO BE SOLVED: To improve leach resistance by mixing a plastic material with an ingredient of a solidified aluminosilicate, sintering the mixture at the synthesizing temperature of the aluminosilicate and then sintering it at the softening temperature or higher of the plastic material. SOLUTION: A skeletal material 1 of solidified aluminosilicate and waste 2 of a molten salt are supplied to mixing process 4. Then, much the same quantity of a plastic ingredient 3 as that of the mixture is supplied and they are mixed evenly. The mixed materials are put into a cylindrical stainless container in a molding process 5 and pressure molding is carried out under the pressure of about 2,000 kg/cm exerted from the upper part of the container. With the mixed materials kept in the container, they are sintered at nearly 700 deg.C for about 200 hours under the atmosphere in the first sintering process 6. In the second sintering process 7, subsequently, the mixture is sintered at the softening temperature of 1,000 deg.C of the plastic ingredient 3 for about 10 hours to obtain waste 8 of solidified chloride. Consequently, the solidified waste is in contact with a liquid with a small contact when the waste is immersed in the water and such a simple process also makes it possible to manufacture a solidified waste with a less quantity of unimmobilized waste of the molten salt 2.

43. 发明专利

JPH11202091A MOISTURE REMOVING METHOD OF RADIOACTIVE GAS WASTE PROCESSING SYSTEM 失效
公开(公告)号：JPH11202091A
公开(公告)日：1999-07-30
申请号：JP217698
申请日：1998-01-08
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： YOKOSE KENJI , KAWABE KENICHI , KONNO MASANOBU , KUMASAKA MASAKI , SAWA TOSHIO
IPC分类号： G21F9/02
摘要： PROBLEM TO BE SOLVED: To prevent secondary side contamination of a permeable film and improve safety and reliability of a nuclear plant by using a steam permeable film on a dehumidifier, providing temperature difference of a medium in a primary system and a secondary system of the steam permeable film and selectively permeating steam. SOLUTION: An exhaust gas of a primary side fluid introduced to a dehumidifier 1 from an exhaust gas condenser enters inside of a drum side of the dehumidifier via an exhaust gas inlet 4. A circulation water of a secondary side fluid is introduced to an upper water chamber 8 of the dehumidifier 1 via a circulation water inlet 6, flowed in the inside of a steam permeable film 11 downward, and introduced to the outside of the dehumidifier 1 via a lower water chamber 9 and a circulation water outlet 7. Thus, the steam of the exhaust gas is removed in a process in which circulation water leads to the lower water chamber 9 from the upper water chamber 8 of the dehumidifier 1. In addition, the condensed water of the exhaust gas side of the steam permeable film 11 is moved up to the upper part of the lower water chamber 9 by gravity, and discharged to the outside via a condensed water outlet 10. As a result, since radioactive waste can be prevented from mixing in the circulation water side of the steam permeable film 11, safety and reliability of a radioactive gas waste processing facility can be improved.

44. 发明专利

JPH10311897A METHOD AND FACILITY FOR DISPOSING OF WASTE LIQUID 失效
公开(公告)号：JPH10311897A
公开(公告)日：1998-11-24
申请号：JP11943397
申请日：1997-05-09
申请人： HITACHI LTD , HITACHI KYOWA ENG KK
发明人： KIDO YOSHIHIRO , YOSHIKAWA RYOZO , SAWA TOSHIO
IPC分类号： G21F9/06 , C02F1/04 , C02F1/44 , G21F9/08
摘要： PROBLEM TO BE SOLVED: To solve problems with enrichment or dry pulverization and solidification processes by removing, at the first step of processing, univalent ion which is harmful to these processes from waste liquid to be disposed of. SOLUTION: Solids are removed by a filter 2 from waste liquid, i.e., the subject of enrichment or drying pulverization process which is put into a waste liquid tank 1, and then the waste liquid is supplied to an electrodialyzer 11 to separate the same into univalent ion and bivalent or more ions; the liquid from which the univalent ion has been removed and the liquid enriched with univalent ions are separately collected into a processing liquid tank 12 and a separate liquid collecting tank 13, respectively. The waste liquid collected in the processing liquid tank 12, when it is subjected to enrichment process by an enriching device 14, can be enriched until the concentration of the enriched liquid reaches a reference value. Also, when the waste liquid is dry pulverized by a drier, pulverization can be continued well under stable conditions without a decrease in pulverization performance; in a solidification process, malfunctions such as the delay of polymerization reactions do not occur, and normal solidification is made possible.

45. 发明专利

JPH07128495A RADIOACTIVE MATERIAL RECOVERY AND DISCHARGE DEVICE 失效
公开(公告)号：JPH07128495A
公开(公告)日：1995-05-19
申请号：JP27807593
申请日：1993-11-08
申请人： HITACHI LTD
发明人： NAGASE MAKOTO , SAWA TOSHIO , HARA TERUO , HOSOKAWA HIDEYUKI , ASAKURA YAMATO
IPC分类号： G21F9/06
摘要： PURPOSE:To reduce contamination of downstream equipment with radioactives and efficiently use the radioactives by using a pressure vessel containing a heater or porous electrode for recovering and discharging the radioactives and recovering the radioactives in high temperature water. CONSTITUTION:A boiling recovery and discharge device used as the radioactives recovery and discharge device is constituted of a pressure vessel 10, heater pins 11 and a power controller 12. In the recovery mode, the high temperature water flowing in the pressure vessel 10 is boiled on the heater pins 11 heated by power supply from a power supplier 12 under the control of the supply power. When the supply power is raised, boiling starts at the saturation temperature corresponding to the system pressure. Further increase results in the rise of void fraction at the outlet. The recovery rate of radioactives increases with the void fraction. As the radioactives recovery device, an electrodeposition recovery and discharge device containing porous electrodes can be utilized.

46. 发明专利

JPH06307735A ABSORPTION FREEZER 失效
公开(公告)号：JPH06307735A
公开(公告)日：1994-11-01
申请号：JP9741693
申请日：1993-04-23
申请人： HITACHI LTD
发明人： YOKOSE KENJI , NISHINO YOSHITAKA , SAWA TOSHIO , NAKAO TAKESHI , AIZAWA MICHIHIKO , OUCHI TOMIHISA
IPC分类号： F25B37/00 , F25B43/04
摘要： PURPOSE:To reduce the occurrence of fluid resistance of steam in the absorber of an absorption freezer and to facilitate discharge of non-condensed gas in an absorber. CONSTITUTION:In a section where alignment of the heat transfer pipes of an absorber is seen from the longitudinal direction of the heat transfer pipe, a space is formed between a pipe group and a wall surface to form a steam flow passage 2. The width of a flow passage is decreased because of a wall surface in the middle of the steam flow passage 2 being continuously inclined in the direction of a steam flow. A bleed port 7 is installed outside a pipe group and non-condensable gas is discharged with high efficiency simultaneously with reduction of a pressure loss. Steam generated at a vaporizer flows through a steam inflow part 3 and flows through a steam flow passage 2 over the whole interior of an absorber. Simultaneously, the steam is absorbed by means of absorption liquid 5 sprayed over the outer surface of each transfer pipe by means of an absorption liquid spraying device 4. Through the effect of the steam flow passage 2 between a pipe group region, where heat transfer pipes 1 are densly arranged, and a wall surface, and flow resistance of steam can be reduced. Rectification is effected in a manner to form a bleed port 6 additionally functioning as an absorption liquid discharge port or the bleed port 7, and non-condensable gas can be discharged with high efficiency.

47. 发明专利

JPH0677728B2 失效
公开(公告)号：JPH0677728B2
公开(公告)日：1994-10-05
申请号：JP5403587
申请日：1987-03-11
申请人： HITACHI LTD
发明人： BABA TSUTOMU , CHINO KOICHI , UCHIDA SHUNSUKE , SAWA TOSHIO , KIKUCHI JUN
IPC分类号： G21F9/08 , B01D1/30 , B01D19/00 , B01D46/00 , C02F1/04 , G21F9/00

48. 发明专利

JPH06130191A OPERATION OF BOILING WATER REACTOR PLANT, BOILING WATER REACTOR PLANT, AND METAL INJECTION DEVICE 失效
公开(公告)号：JPH06130191A
公开(公告)日：1994-05-13
申请号：JP28130592
申请日：1992-10-20
申请人： HITACHI LTD
发明人： UETAKE NAOTO , NAGASE MAKOTO , KONDO MASAYOSHI , SAWA TOSHIO , UCHIDA SHUNSUKE , ASAKURA YAMATO
IPC分类号： G21C19/307 , G21D1/00 , G21D3/08 , G21F9/28
摘要： PURPOSE:To prevent adhesion of corrosion products consisting mainly of radioactive ions on fuel rods by injecting in reactor water metals lowering the adhesion of corrosion products on nuclear fuel rods during operation. CONSTITUTION:The steam having passed through a turbine 1 is condensed to water in a condenser 2 and the condensate passed is sent by a condensate pump 3 through a condensate filter 4 and impurity is eliminated in a condensate demineralizer 5. The purified water is lead through a water supply pump 6, a low pressure supply water heater 7, a pressure pump 8 and a high pressure supply water heater 9 to the reactor pressure vessel 10. A part of the impurity is eliminated with a reactor purification system 12 connected to a pipe branching from the upstream of a reactor recirculation pump 11. To prevent the adhesion of metal ions to the fuel 13, a copper electrolysis device 15 is placed and copper ion is added through a control valve 14 to the water having passed through the demineralizer 5. To monitor the concentration of copper and nickel ions in the purification system 12, sampled 16 water is metal-ion-analyzed 17. The signal is data processed 18 and Cu/Ni ratio in the reactor water is controlled.

49. 发明专利

JPH0699165A ULTRAPURE WATER MANUFACTURING DEVICE 失效
公开(公告)号：JPH0699165A
公开(公告)日：1994-04-12
申请号：JP24950192
申请日：1992-09-18
申请人： HITACHI LTD
发明人： KUROKAWA HIDEAKI , MATSUMOTO TAKAYUKI , SAWA TOSHIO
IPC分类号： B01D53/22 , B01D1/22 , C02F1/04
摘要： PURPOSE:To reduce water manufacturing cost and improve the quality of generated ultrapure water by adopting a multiple-effect system which uses a distillation part structure incorporating an extratubular descending flow liquid membrane in a method for obtaining ultrapure water by condensation after distillation of untreated water and removal of generated mist. CONSTITUTION:The subject ultrapure water consists of a deaeration part 104, distillers 105, 111, 112, a condenser 113 and hydrophobic multi-porous membranes 110, 120, 121. The distillers 105, 111, 112 are of an extratubular descending flow liquid membrane type. The liquid running outside a heat conducting pipe in a first distiller 105 is sent to the untreated water inlet 115 of a second distiller 111 from an untreated water outlet 114. The same procedures are taken with the second and a third distiller 111, 112. Vapor generated from the third distiller 112 is filtered by the hydrophobic multi-porous membrane 121, then is condensated by a condenser 102, and the condensed water obtained by the second and the third distiller 111, 112 and the condenser 102 is supplied as ultrapure water. In the extratubular descending flow liquid membrane system, generated water runs through a welded part between the heat conducting pipe and a terminal plate, thus causing no fear about contamination.

50. 发明专利

JPH0639211A METHOD AND DEVICE FOR BACKWASHING FILTER 失效
公开(公告)号：JPH0639211A
公开(公告)日：1994-02-15
申请号：JP19969492
申请日：1992-07-27
申请人： HITACHI LTD , BABCOCK HITACHI KK
发明人： FUNABASHI KIYOMI , YAMAGUCHI TETSUO , MIURA HIDEKAZU , HAYATA TAKASHI , SAWA TOSHIO , INOUE SETSUO
IPC分类号： B01D29/46 , B01D24/46 , B01D29/62 , B01D29/66
摘要： PURPOSE:To backwash a porous filter low in permeability with water in the amt. equivalent to that used in an ordinary filter. CONSTITUTION:When a deposited film is formed on the porous body, valves 24 and 25 are opened, a pump 4 is driven to supply cleaning water on the downstream side of the porous body 1 of a vessel 2, and the air remaining in the vessel 2 is discharged from a pipeline 15 by the cleaning water. A valve 22 is then opened, the water in the vessel 2 is pressurized with the compressed air in an air tank 3, and then a valve 23 is opened. Consequently, pressure is uniformly exerted over the entire porous body 1, and the layer of the deposited suspended-matter is comletely peeled off.

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