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11. 发明专利

JP2004139314A Hunting suppressing method for operation signal and reaction plant 审中-公开
标题翻译：用于操作信号和反应装置的检测抑制方法
公开(公告)号：JP2004139314A
公开(公告)日：2004-05-13
申请号：JP2002302846
申请日：2002-10-17
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： SUZUKI KATSUYUKI , NISHINO YOSHITAKA , MATSUI YUJI , SHIRAISHI TOMOFUMI , INADA KAZUHIRO
IPC分类号： G05B13/02 , G05B11/36 , G05D23/19
摘要： PROBLEM TO BE SOLVED: To provide a method and device for suppressing the hunting of an operation signal since a large stress is partially imposed on the valve of control equipment due to the occurrence of the hunting of the operation signal, and there is any possibility that equipment failure is caused although apparent main controlled variable are stable.
SOLUTION: An operation signal SU is outputted to control a plant 30 on the basis of a target value SR, and controlled variable SY being the output of the plant are fetched, and the plant 30 is feedback-controlled according to a deviation signal EY between the target value SR and the manipulated variable SY. When the vibration of the operation signal SU is detected, the parameter of a controller 20 is set to a predetermined value for attenuating the vibration. Furthermore, the vibration of the deviation signal EY is evaluated, and when it is decided that the vibration of either the operation signal SU or the deviation signal EY is not present, the parameter is reset to another predetermined value or the original value. Thus, it is possible to suppress the hunting of the operation signal, and to protect instrumentation equipment such as a valve. Thus, it is possible to improve the quality of a product manufactured by equipment to be controlled as a result.
COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：提供一种抑制操作信号的捕获的方法和装置，因为由于操作信号的发生而导致控制设备的阀部分施加大的应力，并且存在任何设备故障的可能性，尽管明显的主要控制变量是稳定的。解决方案：根据目标值SR输出操作信号SU以控制设备30，并且取出作为设备的输出的控制变量SY，并且根据偏差反馈控制设备30 目标值SR与操作变量SY之间的信号EY。当检测到操作信号SU的振动时，将控制器20的参数设定为用于衰减振动的预定值。此外，评估偏差信号EY的振动，并且当确定不存在操作信号SU或偏差信号EY的振动时，将参数重置为另一预定值或原始值。因此，可以抑制操作信号的捕获，并且保护诸如阀的仪表设备。因此，可以提高由被控设备制造的产品的质量。版权所有（C）2004，JPO

12. 发明专利

JP2003183374A METHOD FOR COLLECTING POLYETHYLENE TEREPHTHALATE MANUFACTURING CATALYST AND MANUFACTURING APPARATUS FOR POLYETHYLENE TEREPHTHALATE 审中-公开
公开(公告)号：JP2003183374A
公开(公告)日：2003-07-03
申请号：JP2001386906
申请日：2001-12-20
申请人： HITACHI LTD
发明人： MORI TOSHIKATSU , NISHINO YOSHITAKA , MAEDA NORIFUMI , ODA MASASHI
IPC分类号： C08G63/88 , C08G63/78
摘要： PROBLEM TO BE SOLVED: To collect a polyethylene terephthalate (PET) manufacturing catalyst with use of an energy in a PET manufacturing system and without use of an acid. SOLUTION: A method for collecting the PET manufacturing catalyst used for manufacturing PET is that a catalyst in a distillated liquid obtained by cooling a distillated gas generated in at least one side of a means for esterification and a means for polycondensation is adsorbed to an adsorbent and the adsorbent and a part of the distillated liquid after the catalyst is adsorbed are heated to desorb and collect the catalyst. The PET manufacturing catalyst can be collected efficient with saving energy. COPYRIGHT: (C)2003,JPO

13. 发明专利

JP2000046993A METHOD FOR OPERATING BOILING-WATER NUCLEAR PLANT 失效
公开(公告)号：JP2000046993A
公开(公告)日：2000-02-18
申请号：JP21370898
申请日：1998-07-29
申请人： HITACHI LTD , HITACHI NUCLEAR ENG , HITACHI ENG CO LTD
发明人： YASUDA TAKAYOSHI , TAKASE IWAO , NISHINO YOSHITAKA , AIZAWA MOTOHIRO , ITO KENICHI
IPC分类号： G21D3/00 , G21D3/08
摘要： PROBLEM TO BE SOLVED: To reduce the corrosion of a Zr liner covering pipe by controlling the temperature of primary cooling water and the concentration of dissolved oxygen during the activation operation period from the end of construction of a boiling-water nuclear plant to the pull-out operation of a control rod by starting deaerating a steam condenser. SOLUTION: A nuclear fuel assembly 15 using a Zr liner covering pipe is loaded into a reactor 1 after the construction of a boiling-water nuclear plant has been completed or the reactor is at halt. Then, a recirculation pump 9 is started for circulating reactor water and at the same time the temperature of the reactor water is maintained at approximately 10 deg.C due to Joule heat that is generated by the rotation of the recirculation pump 9 for measurement by a sampling device 14. Then, deaeration by a vacuum pump 16 that is mounted on a steam condenser 3 is started, and dissolved oxygen in furnace water is eliminated. Then, an oxygen gas is introduced from a gas inflow device 12 to the furnace water, and the amount of inflow of oxygen gas is controlled so that the concentration of dissolved oxygen in the furnace water and supply water reaches 100-150 ppb for measurement by the furnace water and supply water sampling devices 14 and 13.

14. 发明专利

JPH10260280A ZIRCONIUM BASED ALLOY, FUEL CLADDING TUBE AND FUEL ASSEMBLY FOR REACTOR 失效
公开(公告)号：JPH10260280A
公开(公告)日：1998-09-29
申请号：JP6664497
申请日：1997-03-19
申请人： HITACHI LTD , HITACHI ENG CO LTD , HITACHI NUCLEAR ENG
发明人： ENDO MASAO , NISHINO YOSHITAKA , YASUDA TAKAYOSHI , ITO KENICHI , AIZAWA MOTOHIRO , TAKASE IWAO
IPC分类号： G21C3/07 , G21C3/328
摘要： PROBLEM TO BE SOLVED: To enhance uniform corrosion resistance at low cost by setting the sum of content of Fe and Ni for the entire zirconium based alloy for reactor composed of Sn, Fe, Ni, Cr, Zr and inevitable impurities being employed as a fuel cladding tube within a specified range. SOLUTION: Fuel rods 5 arranged in the outermost circumferential region of a 9×9 square lattice employs a zirconium based alloy for reactor composed of Sn, Fe, Ni, Cr, Zr and inevitable impurities as a fuel cladding tube 9 wherein the sum of content of Fe and Ni for the entire alloy is set in the range of 0.25-0.35wt.%. Surface roughness of the fuel cladding tube 9 is set at 0.25μm or below, for example. Other fuel rods 5 are composed of a normal zirconium based alloy for reactor and the surface roughness is set at 0.25μm or above, for example.

15. 发明专利

JPH08297196A BOILING WATER NUCLEAR POWER PLANT 失效
公开(公告)号：JPH08297196A
公开(公告)日：1996-11-12
申请号：JP10340395
申请日：1995-04-27
申请人： HITACHI LTD
发明人： WATANABE YASUKO , NISHINO YOSHITAKA
IPC分类号： G21C19/307 , G21D1/00 , G21D3/08
摘要： PURPOSE: To mitigate the corrosive environment of a primary cooling system by providing a device reducing the dissolved oxygen concentration in the circulation path of the primary cooling water, and suppressing the accumulation of an oxidizing constituent. CONSTITUTION: The primary cooling water separated from steam is again returned to a core through a mixing plenum 4, a downcomer 5, a jet pump, and a lower plenum 7. Part of the cooling water contributes to the drive of the jet pump from the downcomer 5 through a recirculation pump 6 and a recirculation pipe. Part of the primary cooling water flowing in the recirculation pipe is removed with impurities by a reactor purifying system 8 then is merged with the fed water. A dissolved oxygen concentration reducing device 23 installed on the recirculation pipe removes the gas constituent from the liquid together with the steam generated by heating and boiling. The extracted gas containing oxygen is processed as off-gas. The waste heat in a power plant such as the waste heat generated when steam is condensed by a heat pump can be effectively utilized for feeding heat to the dissolved oxygen concentration reducing device 23.

16. 发明专利

JPH08240562A HYDROGEN PEROXIDE SENSOR FOR REACTOR WATER 失效
公开(公告)号：JPH08240562A
公开(公告)日：1996-09-17
申请号：JP4381295
申请日：1995-03-03
申请人： HITACHI LTD
发明人： ISHIZUKA KEIKO , NISHINO YOSHITAKA , ENDO MASAO , IBE HIDEFUMI
IPC分类号： G01N27/406 , G01N27/416 , G21C17/02
摘要： PURPOSE: To grasp an accurate water quality environment in reactor water by directly measuring a hydrogen peroxide concentration. CONSTITUTION: Two electrodes are mounted on both sides of an ion conductive substance 1, where sews an sensor one a electrode 2 for detecting hydrogen peroxide, and the other a reference electrode 3 having a constant electric potential. A difference between the sensor electrode 2 in hydrogen peroxide concentration and the reference electrode 3 is measured as an electromotive force.

17. 发明专利

JPH0875883A FUEL ASSEMBLY, NUCLEAR POWER PLANT, AND NUCLEAR POWER PLANT OPERATING METHOD 失效
公开(公告)号：JPH0875883A
公开(公告)日：1996-03-22
申请号：JP21128494
申请日：1994-09-05
申请人： HITACHI LTD
发明人： ITO SHUICHI , UETAKE NAOTO , NISHINO YOSHITAKA
IPC分类号： G21C3/30 , G21C3/326 , G21C19/307 , G21D3/00
摘要： PURPOSE: To provide a nuclear power plant for which a reactor cooling water purifying system is made unnecessary or made reduced in scale by capturing radioactive ion and clads by a nuclear reactor fuel assembly and removing the ions and clads at the time of replacement of the fuel assembly to clean a primary cooling water. CONSTITUTION: Some of fuel rods 1 composing a fuel assembly are replaced by filter rods 2 containing an adsorbent 5 inside. Replacement can be carried out easily by making the shapes (especially cross section shapes) of the filter rods 2"l$ the same as those of the fuel rods 1. Moreover, can be the effect of the filter rods upon the reaction and coolant can be liminted to the minimum. Or, powder adsorbent is poured in the cooling water. The adsorbent 5 adheres to fuel rods 1 while adsorbing clads, etc. When the fuels are replaced, the adsorbent 5 and clads adsorbed by the adsorbent can be taken out of the a reactor simultaneously.

18. 发明专利

JPH0571882A POROUS BODY TYPE HEAT EXCHANGER AND FACILITIES WHERE THEY ARE EMPLOYED 失效
公开(公告)号：JPH0571882A
公开(公告)日：1993-03-23
申请号：JP22916991
申请日：1991-09-09
申请人： HITACHI LTD
发明人： FUNABASHI KIYOMI , KUROKAWA HIDEAKI , YAMAGUCHI TETSUO , NISHINO YOSHITAKA , BABA TSUTOMU , SAWA TOSHIO
IPC分类号： F28B1/02 , F28F1/10
摘要： PURPOSE:To obtain a high efficiency heat exchanger which uses a hydrophobic porous film. CONSTITUTION:A large number of heat exchanger tubes made of a hydrophobic porous material 2, which allows the penetration of steam into the material but allows no penetration of liquid, are bundled. A low temperature fluid 1, which is liquid, is passed inside the heat exchanger tubes while a high temperature fluid 2, which is liquid or steam, is passed outside the heat exchanger tubes. It is acceptable even if this internal and external relation is opposite. When the high temperature fluid 2 is liquid, the liquid is vaporized and turned into steam, which penetrates the porous material and enters the low temperature fluid side where it is condensed and turned into liquid. The liquid itself which is a high temperature fluid is unable to penetrate the porous material. When the high temperature fluid is steam, the steam is partially condensed on the high temperature fluid side and turned into liquid drops. The liquid drops thus produced are unable to penetrate the porous material as well. In this manner, heat is transferred from the high temperature fluid 2 to the lower temperature fluid 1. The heat transfer based on thermal conduction of the porous body 2 is added to this heat transfer mechanism as well. It is, therefore, possible to inhibit the penetration with the porous material and prevent the mixture into the low temperature fluid even when there exist impurities in the fluid.

19. 发明专利

JPH04346098A METHOD AND EQUIPMENT FOR INJECTING IRON INTO FEED WATER OF BOILING WATER TYPE NUCLEAR POWER PLANT 失效
公开(公告)号：JPH04346098A
公开(公告)日：1992-12-01
申请号：JP12029991
申请日：1991-05-24
申请人： HITACHI LTD , HITACHI ENG CO LTD , HITACHI KYOWA KOGYO KK
发明人： AIZAWA MOTOHIRO , OSUMI KATSUMI , NISHINO YOSHITAKA , SUZUKI KAZUNOBU
IPC分类号： G21D3/08
摘要： PURPOSE:To obtain a method of injecting iron while checking up the quantity of amorphous iron being effective for production of a composite oxide of Ni and NiFe2O4 coexisting in a feed water system, and equipment for injecting the iron which can suppress reduction of the amorphous iron due to sticking on an injection piping and the feed water system, in regard to a technique of injecting the iron for producing the composite oxide in order to stabilize radioactive concentration in reactor water of a boiling water type nuclear power plant. CONSTITUTION:The quantity of injected iron is controlled by checking up the chemical form of the iron in feed water at an outlet of the final stage of a feed water heater. In equipment for injecting the iron, partition plates 3 are provided for forming a meandering flow passage in a reaction bath 2 wherein iron ions produced in an electrolytic bath 1 are oxidized to be an iron clad, and a time for stabilization of the iron clad in the reaction bath 2 is ensured. Moreover the time for stabilization may be ensured by providing a circulation line branching from an injection piping 9 and returning to the reaction bath 2. In another way, a stabilizing tank for making a carbon dioxide gas be adsorbed on the iron clad for stabilizing the clad is provided on the downstream side of the reaction bath 2.

20. 发明专利

JPH01203096A OPERATION PROCESS FOR HOLLOW YARN MEMBRANE FILTER 失效
公开(公告)号：JPH01203096A
公开(公告)日：1989-08-15
申请号：JP2752888
申请日：1988-02-10
申请人： HITACHI LTD
发明人： NISHINO YOSHITAKA , ADACHI TETSURO , MATSUMOTO TAKAYUKI , SAWA TOSHIO , SHINDO KIICHI
IPC分类号： G21C19/307 , B01D61/16 , B01D61/20 , B01D61/22 , B01D61/54 , C02F1/44 , G21C19/30
摘要： PURPOSE:To decrease amount of deposits on the internal surface of a hollow yarn membrane in a process for purifying water wherein a hollow yarn membrane filter is incorporated in its passage, by controlling a passage with the concentration of metal ion (organic matter) in water of the upstream of the hollow yarn membrane filter. CONSTITUTION:In a process for purifying water wherein a hollow yarn membrane filter is incorporated in its passage, the passage is controlled with the metal ion concentration or organic matter concentration in water of the upstream of the hollow yarn filter. For example, in a primary cooling water circulation system of a boiling water nuclear power plant, a detecting device 8 to detect the concentration of metal ion and organic matter in the upstream of a hollow yarn membrane filter 7 to monitor metal ion concentration or organic matter concentration, wherein a flow rate controller 10 of a hollow yarn membrane bypass passage 9 is regulated with the monitored concentration to regulate the flow quantity to the filter 7. In this manner, load of metal ion or organic matter on the hollow yarn membrane is controlled, so that deposit and separation on the internal surface of the hollow yarn membrane can be decreased, resulting in a prolonged life thereof.

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