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1. 发明专利

JPS6238247A METHOD FOR REGENERATING ION EXCHANGE RESIN 失效
公开(公告)号：JPS6238247A
公开(公告)日：1987-02-19
申请号：JP17587685
申请日：1985-08-12
申请人： HITACHI LTD , HITACHI ENG CO LTD , HITACHI KYOWA KOGYO KK
发明人： OSUMI KATSUMI , MIZUNIWA FUMIO , SHINDO KIICHI , AKAMINE KAZUHIKO , AIZAWA MOTOHIRO
IPC分类号： C02F1/42 , B01J49/00 , G21F9/00 , G21F9/12
摘要： PURPOSE:To reduce the amount of regenerating chemicals and to prolong the life of an ion exchange resin, by regenerating a chelate agent forming a complex along with the metal ion adsorbed by the ion exchange resin by a solution containing regenerating chemicals in an amount equivalent to or slightly more than the metal ion. CONSTITUTION:The chelate agent forming a complex along with the main metal ion adsorbed by an ion exchange resin is regenerated by a solution containing regenerating chemicals in an amount equivalent to or slightly more than the aforementioned metal ion. For example, when the cation exchange resin of a condensation desalting device of a boiling water atomic power plant is regenerated, the amount of the chelate agent contained in the regenerated solution is set to one equal to or more than a mol number necessary for forming a neutral or negative complex along with the metal contained in said ion exchange resin to perform regeneration. The amount of the regenerating solution is suitably adjusted to 1/4-1/2 the amount of the ion exchange resin. Further, it is suitable to perform regeneration by stirring the ion exchange resin and the regenerating solution by air bubbles.

2. 发明专利

JPH0353198A SUSPENDED IRON GENERATOR AND BOILING WATER TYPE NUCLEAR POWER PLANT CONTG. THEREOF 失效
公开(公告)号：JPH0353198A
公开(公告)日：1991-03-07
申请号：JP18850489
申请日：1989-07-20
申请人： HITACHI LTD , HITACHI ENG CO LTD , HITACHI KYOWA KOGYO KK
发明人： MIZUNIWA FUMIO , OSUMI KATSUMI , AIZAWA MOTOHIRO , SAWA TOSHIO
IPC分类号： G21D1/00 , G21D3/08
摘要： PURPOSE:To generate iron which does not contain corrosion products by dissolv ing ferrous carbonate into water, adding gas contg. oxygen to this water to remove carbon dioxide and suspending iron ions as iron hydroxide therein. CONSTITUTION:Pure water 5 is supplied via a supply piping 4 into a carbon dioxide absorption column 1 from the upper position thereof. A gas diffuser 6 is disposed in the internal lower position thereof. The mixture composed of the carbon dioxide in a carbon dioxide cylinder 7 and the gaseous nitrogen in a gaseous nitrogen cylinder 8 mixed in a mixer 9 is supplied to this diffuser 6. The water absorbing the carbon dioxide is introduced through a piping 12 having an electrical conductivity meter 10 into a ferrous carbonate dissolving vessel 2 of the ensuing stage. The vessel 2 is equipped with a bucket 22 contg. the ferrous carbonate 21, a stirrer 24, etc., and the ferrous carbonate 21 dissolves in water. This water is sent to an iron hydroxide forming vessel 3 where the ferrous carbonate is converted to the iron hydroxide. Gaseous oxygen is supplied from a gaseous oxygen cylinder 33 into the vessel 3 and the iron carbonate in the water is converted to the iron hydroxide by this gaseous oxygen and is suspended in the water.

3. 发明专利

JPH041599A REDUCING METHOD FOR RADIOACTIVE MATERIAL OF ATOMIC ENERGY POWER PLANT 失效
公开(公告)号：JPH041599A
公开(公告)日：1992-01-07
申请号：JP10034890
申请日：1990-04-18
申请人： HITACHI LTD , HITACHI ENG CO LTD , HITACHI KYOWA KOGYO KK
发明人： AIZAWA MOTOHIRO , OSUMI KATSUMI , MIZUNIWA FUMIO , SUZUKI KAZUNOBU
IPC分类号： G21D3/08
摘要： PURPOSE:To improve reliability for the control of iron density by injecting soluble iron salt in a method by which the density of a radioactive material in nuclear reactor water can be reduced by controlling the density of iron and nickel in supply water. CONSTITUTION:The supply of pure water to a dissolver 1 is performed by a supply water piping 21, and the supply and the stoppage of the supply water are performed with a valve 22. Also, it is possible to attach controllability to perform the adjustment of a water level by a water level meter 19, and to automatically close the valve 22 by an instruction for an upper limit water level, and to automatically open the valve by the instruction for a low limit water level. A diffusion tube 23 and a supply pipe 24 for nitrogen gas and carbon dioxide gas connected to the tube 23 are provided to obtain carbonic acid required for the dissolution of ferrous carbonic acid. The quantity of dissolution of the ferrous carbonic acid is adjusted by varying water carbonic acid density by the voltage division control of the carbon dioxide. In such a case, the quantity of dissolution can be stabilized by controlling the temperature of liquid by keeping constant by a humidifier 18 and a thermometer 20.

4. 发明专利

JPH041598A ELECTROLYTIC IRON INJECTOR 失效
公开(公告)号：JPH041598A
公开(公告)日：1992-01-07
申请号：JP10034790
申请日：1990-04-18
申请人： HITACHI LTD , HITACHI ENG CO LTD , HITACHI KYOWA KOGYO KK
发明人： KATAOKA ICHIRO , AIZAWA MOTOHARU , USUI NAOSHI , OSUMI KATSUMI , MIZUNIWA FUMIO
IPC分类号： G21D3/08
摘要： PURPOSE:To easily dissolve and eliminate attached and grown iron that is a main cause of nonconformity by providing a chemical cleaning device which dissloves and eliminates an iron clad attached on an iron injection piping and constitutional equipment, and a piping for cleaning. CONSTITUTION:When iron electrolysis is performed, an electromagnetic valve 7, a flow rate adjusting valve 8, and a valve 9 are opened, and monitoring by a flow meter 11 is performed, and the iron is introduced to a carbon deoxide absorbing tub 1, and is heated with a heater 11. A flow meter 14, a flow rate adjusting valve 15, and a check valve 16 are provided at the piping 13 between the carbon deoxide tub 1 and a carbon deoxide bomb 12. Thence, water whose conductivity is increased is introduced to an iron electrolytic cell, and an iron electrode plate 17 arranged in the cell is electrolyzed by a DC power unit 30, and iron ion can be dissolved out. The iron ion generated by electrolysis is easy to be attached on equipment in the device or the injection piping, etc., therefore, the making of the iron ion into clad is expedited at a cladding tub 3, and it is supplied to a water supply mother pipe 47 by an injection pump 4 via an iron injection piping 18.

5. 发明专利

JPH0416795A IRON INJECTOR FOR REACTOR FEED WATER OF BOILING WATER REACTOR POWER PLANT 失效
公开(公告)号：JPH0416795A
公开(公告)日：1992-01-21
申请号：JP12204390
申请日：1990-05-11
申请人： HITACHI LTD , HITACHI ENG CO LTD , HITACHI KYOWA KOGYO KK
发明人： AIZAWA MOTOHIRO , KATAOKA ICHIRO , OSUMI KATSUMI , ICHIMURA AKIRA , SAWA TOSHIO
IPC分类号： G21D3/08 , G21D1/00 , G21F9/28
摘要： PURPOSE:To improve efficiency of iron injection by injecting iron in the form of crud instead of ion into reactor feed water. CONSTITUTION:The feed water flowing through a pipe 36 into a tank 1 is elevated in its electric conductivity by injecting carbon dioxide gas from a nozzle 4, and flows through a pipe 13, into an electrolysis tank 2, and then between iron plate electrodes 5 where iron ion is solved in by electrolysis. By injecting inert gas in the tank 2 from a nozzle 6 bellow the electrodes, stripping of oxigen gas and clearing of extraneous matter on the electrodes are made during the electrolysis. The water including iron ion made in the electrolysis tank 2 flows through a pipe 14 into a reaction tank 8 where the iron ion is changed into crud of iron hydroxide or iron oxide by injecting air from a nozzle 8'. The said carbon dioxide gas, inert gas and air supplied are exhausted from nozzles 55 at the top of the tanks 2 and 8, and the water including crud-form iron made in the above way is injected into the reactor feed water through a pipe 56 and a water injection pump 15.

6. 发明专利

JPH01277748A WATER QUALITY MONITOR METHOD IN STEAM POWER PLANT 失效
公开(公告)号：JPH01277748A
公开(公告)日：1989-11-08
申请号：JP10731588
申请日：1988-04-28
申请人： HITACHI LTD , HITACHI ENG CO LTD , HITACHI KYOWA KOGYO KK
发明人： MIZUNIWA FUMIO , OSUMI KATSUMI , ITO HISAO , IGARASHI HIROO , SHINDO KIICHI
IPC分类号： G01N27/06 , G01N33/18 , G21C17/02
摘要： PURPOSE:To efficiently use the adsorption capacity of an ion exchange resin and to quantitatively determine the proper replacement of the ion exchange resin, by accurately calculating not only the concn. of an ion becoming the load to the ion exchange of a condensing demineralizer but also the adsorption load quantity to the ion exchange resin. CONSTITUTION:The whole quantity of the condensed water from a condenser 1 is passed through a condensing demineralizer 3 to adsorb and remove the ion components in said condensed water by an ion exchange resin 21 and the treated water is supplied to a nuclear reactor 5 through a water feeding heater 4. A part of the condensed water is sampled as sample water from each of sample water collecting pipings 7, 8 to respectively guide both sample waters to carbonic acid densitometers 9, 11 and conductivity meters 10, 12 to measure carbonic acid concns. and conductivities. At this time, the contribution of a free hydrogen ion caused by carbonic acid to the measured value of conductivity is calculated and the conductivity value obtained by subtracting said contribution from the conductivity measured value is converted to NaCl concn. The concn. of an ion becoming the load to the ion exchange resin in water is evaluated. By this method, the proper replacement of the ion exchange resin is quantitatively determined.

7. 发明专利

JPH08170999A METHOD AND DEVICE FOR CONTROLLING REACTOR WATER IN NUCLEAR POWER PLANT 失效
公开(公告)号：JPH08170999A
公开(公告)日：1996-07-02
申请号：JP31446594
申请日：1994-12-19
申请人： HITACHI LTD , HITACHI ENG CO LTD , HITACHI KYOWA KOGYO KK
发明人： AIZAWA MOTOHIRO , SUZUKI KAZUNOBU , OSUMI KATSUMI
IPC分类号： G21C17/02 , G21D3/08
摘要： PURPOSE: To make it possible to reduce the radiation concentration in reactor water at a boiling-water nuclear power plant at all times. CONSTITUTION: The concentration of an injected liquid dissolving metal ions is regulated in a concentration regulating tank 22, and it is supplied to the primary cooling water system by an injecting pump 33. In this process, the concentration of the liquid injected into the concentration regulating tank 22 and the quantity of that injected into the primary cooing water system are regulated so that the equivalent concentration of the metal ions as cations in the reactor water may range from half to twice of that of chromic acid as anions.

8. 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.

9. 发明专利

JPH02253159A PERFORMANCE DIAGNOSING DEVICE FOR WATER TREATING DEVICE 失效
公开(公告)号：JPH02253159A
公开(公告)日：1990-10-11
申请号：JP7596989
申请日：1989-03-28
申请人： HITACHI LTD , HITACHI KYOWA KOGYO KK
发明人： ICHIMURA AKIRA , HIRANO SADAKUNI , OSUMI KATSUMI , MIZUNIWA FUMIO , KONASE ATSUSHI
IPC分类号： G01N30/96 , C02F1/42 , G01N30/00
摘要： PURPOSE:To optimize exchange frequencies by collecting plural test samples from an ion exchange medium and analyzing an ion exchange capacity in accordance with the change in the electrical conductivity between the inlet and outlet of the samples. CONSTITUTION:A sodium chloride soln. is put at 1 to 1,000ppm into a sample liquid vessel 1 and while the flow rate thereof is adjusted by a flow rate regulating valve 4 and a flow meter 5, the sample liquid is sent through a connecting piping 2 by a liquid feed pump 3 into an ion exchange medium vessel 7. The electrical conductivity and temp. in the inlet and outlet of the vessel 7 are measured by an electrical conductivity meter and thermometer 6 with the height of the ion exchange medium layer in the vessel 7 as the unit treatment height of the exchange medium and are inputted to a data processor 8 which measures the ion exchange capacity of the sample ion exchange medium at an arbitrary temp. and flow rate. The other necessary data are inputted to an external data input/output device 9 which calculates the quality of the treated water. The frequencies for the regeneration or exchange of the ion exchange medium are optimized in such a manner.

10. 发明专利

JPH0493698A MAIN STEAM SYSTEM RADIOACTIVE NUCLIDE ANALYZER AND MEASURING METHOD THEREOF 失效
公开(公告)号：JPH0493698A
公开(公告)日：1992-03-26
申请号：JP20499090
申请日：1990-08-03
申请人： HITACHI LTD , HITACHI KYOWA KOGYO KK
发明人： AKAMINE KAZUHIKO , ICHIMURA AKIRA , BUSHI NORIAKI , OSUMI KATSUMI , IBE HIDEFUMI , MIZUNIWA FUMIO
IPC分类号： G21C17/02 , G21D3/08
摘要： PURPOSE:To grasp a time lag for measurement so accurately as well as to make main steam radioactive nitrogen content measurable accurately by chemical forms, by measuring the extent of concentration of radioactive nitrogen in both liquid and gas phases as doing a continuous water pass into a device by chemical forms. CONSTITUTION:A sampling system is made to work, and a flow of steady steam/water is formed in a system leading to a sampling rack from a cooler 9. At the upstream side, there are provided an anion exchange resin tower 12, a cation exchange resin tower 13, an anion/cation exchange resin mixed floor tower 14 and a bypass line in a parallel manner. At the downstream side of a resin column, there is provided a radiation detector 17 surrounded by a lead screen 16. Analysis takes place as passing main steam condensed water in succession. With this constitution, the analyzed result can be brought continuously, and a variable state and its cause of N-13 can be grasped and simultaneously analytic accuracy inclusive of a gas component is improved.

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