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41. 发明专利

JPS5913100A Method for controlling thickness of oxidized film 失效
标题翻译：控制氧化膜厚度的方法
公开(公告)号：JPS5913100A
公开(公告)日：1984-01-23
申请号：JP12203182
申请日：1982-07-15
申请人： Hitachi Ltd
发明人： KATSURA AKIHIDE , OZAWA YOSHIHIRO , UCHIDA SHIYUNSUKE
IPC分类号： C25D21/12 , G21D1/00 , G21D3/08
CPC分类号： Y02E30/40
摘要： PURPOSE: To obtain an oxidized film having an optimum thickness in a forming method of a film for preventing the sticking of radioactive ions, by monitoring electrically the thickness of the oxidized film to be electrochemically formed.
CONSTITUTION: A metallic structural material 3 to be used in contact with liquid contg. a radioactive material in a primary cooling system of a nuclear reactor is dipped in a treating tank and an power source 4 is connected between the same and a cathode 2. The power source 4 is controlled to maintain the optimum voltage for forming an oxidized film. The quantity of the electricity flowing between the material 3 and the cathode 2 is monitored. The quantity of electricity which is determined from the relation between the thickness of the film and the quantity of electricity and at which the film is formed at an optimum thickness is conducted between the material and the cathode, whereby the film is formed to the optimum thickness of about 1μm.
COPYRIGHT: (C)1984,JPO&Japio
摘要翻译：目的：通过对电化学形成的氧化膜的厚度进行电监测，得到在防止放射性离子粘附的膜形成方法中具有最佳厚度的氧化膜。构成：与液体接触使用的金属结构材料3。将核反应堆的一次冷却系统中的放射性物质浸渍在处理槽中，并且将电源4连接在其与阴极2之间。控制电源4以保持用于形成氧化膜的最佳电压。监测在材料3和阴极2之间流动的电量。从材料和阴极之间进行由薄膜的厚度与电量之间的关系决定膜的最佳厚度的电量，由此形成为最佳厚度约1mum。

42. 发明专利

JPS5834353A OXYGEN METER 失效
公开(公告)号：JPS5834353A
公开(公告)日：1983-02-28
申请号：JP13273581
申请日：1981-08-26
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： OZAWA YOSHIHIRO , UCHIDA SHIYUNSUKE , NAKAYAMA NORIO
IPC分类号： G01N27/404 , G01N27/416 , G01N27/49
摘要： PURPOSE:To measure the concentration of O2 and H2O2 dissolved in a liquid at the same time, by providing each pair of anodes and cathodes in a diaphragm type oxygen electrode and applying different applying voltage between each electrode. CONSTITUTION:O2 and H2O in a sample water enter into an electrolytic solution 13 passing through a diffusion film 2 provided on a sensor main body 1 which constitutes an oxygen meter. Cathodes 3, 4 and anodes 5, 6 are provided in the electrolytic solution 13. A battery 9 and an ammeter 18 are connected between the anode 5 and the cathode 3 and electric potential for reducing only H2O2 in the sample water is applied and then, an electric current A1 at this time is measured. Further, a battery 12 and an ammeter 11 are connected between the anode 6 and the cathode 4 and the electric potential for reducing O2 and H2O2 is applied and then, an electric current A2 at this time is measured. O2 is measured separately from H2O2 in a short time because the concentration of H2O2 in the sample water corresponds to the current A1 and that of O2 corresponds to the current A2-A1.

43. 发明专利

JPS57203945A HIGH TEMPERATURE/HIGH PRESSURE TYPE DISSOLVED OXYGEN METER 失效
公开(公告)号：JPS57203945A
公开(公告)日：1982-12-14
申请号：JP8819581
申请日：1981-06-10
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： OZAWA YOSHIHIRO , UCHIDA SHIYUNSUKE , NAKAYAMA NORIO
IPC分类号： G01N27/404 , G01N27/49 , G21C17/02
摘要： PURPOSE:To prevent damage to the body of a detector and an oxygen transmitting film under a high temperature and a high pressure by pinching a heat resistant oxygen transmitting film with a metal filter and a porous cathode while a thermal expansion of an internal electrolytic liquid is absorbed with a bellows. CONSTITUTION:The body 7 of a detector is housed in a container 2 through which a sample water passes and the body 7 thereof is filled with an electrolytic liquid. An oxygen transmitting film 9 for separating the sample water and the electrolytic liquid is grasped with a metal filter 10 arranged on the side of the sample water and with a porous cathode 8 arranged on the side of the electrolytic liquid. A bellows 3 is provided in the body 7 of the detector to absorb thermal expansion of an electrolytic liquid 6. A sample water flowing into a container 2 from a sample water inlet 12 drains outside at a sample water outlet 1 after passing the surface of the metal filter 10. The infiltration of the sample water into the body of the detector maintains a balance in the pressure between the detector and the electrolytic liquid.

44. 发明专利

JPS56124412A MAGNETIC SEPARATOR 失效
公开(公告)号：JPS56124412A
公开(公告)日：1981-09-30
申请号：JP2664180
申请日：1980-03-05
申请人： HITACHI LTD
发明人： FUJITA KAZUNORI , YAMASHITA HISAO , NAKASHIMA FUMITO , OZAWA YOSHIHIRO
IPC分类号： B01D35/06 , B03C1/034
摘要： PURPOSE:To trap magnetic particles in an object fluid uniformly at the entire area of a filter and to retard the clogging of the filter by a method wherein a pile of layers of magnetic materials having different values of saturation magnetization is used as the filter of the high-gradient magnetic separator. CONSTITUTION:In the magnetic dehydrator wherein electromagnets 6 for generating an external magnetic field are placed near the periphery of a container 1 containing the magnetic filter consisting of magnetic material in the form of thin wires, small pieces, wire mesh or the like so that the magnetic particles in the object fluid 4 introduced via an inlet port 2 are trapped by the filter while the fluid 4 is discharged via a discharge port 3, the filter is composed of cartridge-type filter members 5a, 5c which are formed by filling thin magnetic wires of different values of saturation magnetization in small-type containers respectively and are placed in the container 1 in such an order that the value of saturation magnetization increases stepwise in the direction from the inlet port 2 toward the discharge port 3.

45. 发明专利

JPS5640404A DESORPTION OF URANIUM IN COLLECTION THEREOF 失效
公开(公告)号：JPS5640404A
公开(公告)日：1981-04-16
申请号：JP11518879
申请日：1979-09-10
申请人： HITACHI LTD
发明人： OZAWA YOSHIHIRO , YAMASHITA HISAO , FUJITA KAZUNORI , MAEKOYA CHIAKI
IPC分类号： C22B60/02 , B01D15/00
摘要： PURPOSE:To permit the effective desorption of uranium with the consumption of lesser amounts of a desorption liquid by a method in which an inert gas is supplied into the lower part of magnetic small wire portion of a magnetic separator to generate bubbles in a desorption liquid and the desorption liquid is brought into contact with an adsorbent through the bubbles. CONSTITUTION:While exciting the magnetic small wire portion 3 of the highly gradient magnetic separator 1 by the exciting coil 4, a magnetic adsorbent adsorbing uranium from the conduit 5 is flowed with the sea water into the casing 2, and then the sea water is discharged from the conduit 6 to the outside of the casing 2. Then, after introducing the desorption liquid in the desorption liquid tank 10 into the casing 2 by operating the desorption liquid pump 9, an inert gas, e.g., air, etc., from the conduit 12 is introduced into the casing 2, whereupon the air is changed into fine bubbles when passing through the filter 15, goes up the desorption liquid, causes the adsorbent arrested by the magnetic small wire portion 3 to come into contact with the desorption liquid during their passage through the magnetic small wire portion 3, and then lead uranium into the desorption liquid.

46. 发明专利

JPS566008A TURBINE STOPPING METHOD 失效
公开(公告)号：JPS566008A
公开(公告)日：1981-01-22
申请号：JP8015679
申请日：1979-06-27
申请人： HITACHI LTD
发明人： OZAWA YOSHIHIRO , UCHIDA SHIYUNSUKE , KITAMURA MASAO
IPC分类号： F01D21/00
摘要： PURPOSE:To prevent scattering of radioactive substances in condenser due to use of vacuum pump in a boiling water reactor or the like, by lowering the cooling capacity of condenser and thereby decelerating the speed of steam turbine temporarily when the turbine speed passes through the critical revolution speed. CONSTITUTION:Before turbine speed reaches the critical speed range, the amount of water passed to cooler 19 in condenser 4 is reduced for lowering its cooling capacity. Resultantly, steam introduced into condenser 4 via by-pass line 28 is condensed at the time when turbine is stopped, which causes rises of steam pressure. Therefore, turbine speed is lowered due to wind loss of steam passing through blades near the final stage. When turbine speed has exceeded the critical speed, the amount of cooling water is increased to the previous level for restoring vacuum level in turbine by lowering steam pressure of condensate.

47. 发明专利

JPS562847A REGENERATION OF URANIUM ABSORBENT 失效
公开(公告)号：JPS562847A
公开(公告)日：1981-01-13
申请号：JP7817979
申请日：1979-06-22
申请人： HITACHI LTD
发明人： YAMASHITA HISAO , FUJITA KAZUNORI , MAEKOYA CHIAKI , NAKASHIMA FUMITO , OZAWA YOSHIHIRO
IPC分类号： C02F1/28 , B01J20/34
摘要： PURPOSE:To prevent the lowering of the original adsorptivity of an adsorbent in the regeneration of adsorbent for adsorbing uranium in the sea water due to repeated regeneragion and raise the efficiency of adsorption of uranium by treating the deactivated adsorbent with hydrochloric acid having a specific concn. CONSTITUTION:In the regeneration of a titanium hydroxide adsorbent for uranium contd. in the sea water, the adsorbent deactivated by the repeated desorption and regeneration by the conventional process using a carbonate is immersed in hydrochloric acid of 0.001-1mol/l concn. at approx. 25 deg.C for 30min. Thereby calcium carbonate is crystallized, which is responsible for the lowering of the adsorptivity by blocking effective hydroxyl groups in the hydrated titanium hydroxide for the adsorption of uranium, and easily removed. Thus, the adsorptivity of the adsorbent for uranium can be completely restored and therefore the uranium recovery efficiency from the sea water is raised.

48. 发明专利

JPS55151283A IONNEXCHANGE RESIN WATER SUPPLIER 失效
公开(公告)号：JPS55151283A
公开(公告)日：1980-11-25
申请号：JP5916479
申请日：1979-05-16
申请人： TOKYO ELECTRIC POWER CO , HITACHI LTD
发明人： ISHIZUKA AKIRA , KITAGUCHI HIROSHI , UCHIDA SHIYUNSUKE , OZAWA YOSHIHIRO
IPC分类号： G01T1/167 , B01J47/00 , B01J47/02 , G01N1/02 , G01T7/00 , G01T7/02 , G21C19/307 , G21F9/12
摘要： PURPOSE:To prevent the danger of radioactive contamination propagation while shortening greatly the time of a water supply to a column by relatively moving the column of an ion-exchange resin water supply unit and a sample water supply container and then by sealing a column injection mouth hermetically in a detachable state. CONSTITUTION:Of an ion-exchange resin water supply unit, column 3 is made airtight by pushing-up cylinder 13 with seal rings 10 and 14 and at this time, the tip of injection nozzle 20 is placed under the surface of swelling liquid 16 at any time. Under the conditions like this, radioactive sample water is supplied and vacuum pump 6 is put into operation to form an airtight air layer of upper lid 11 and seal ring 10 at the upper of the column; and the seal never gets wet and the flow Q1 of the vacuum column becomes equal to supply flow Q2 from sample supply container 1, thereby shortening greatly the water supply time from t1 to (t).

49. 发明专利

JPS55106510A MAGNETIC PACKED TOWER 失效
公开(公告)号：JPS55106510A
公开(公告)日：1980-08-15
申请号：JP1322179
申请日：1979-02-09
申请人： HITACHI LTD
发明人： OZAWA YOSHIHIRO , YAMASHITA HISAO , FUJITA KAZUNORI , MAEKOYA CHIAKI , KITAGUCHI HIROSHI
IPC分类号： B01D35/06 , B01J47/06 , B03C1/025 , B03C1/027
摘要： PURPOSE:To perform adsorption or ion exchange reaction with good efficiency by binding magnetically magnetic particles by using at least two or more magnetic generators and at the same time connecting them to a regenerative magnetic packed tower. CONSTITUTION:In order to remove subject components in liquid to be treated, the liquid is separated from process flow or the whole of the liquid is introduced from the lower part 11 of the magnetic packed tower into the magnetic packed tower 1 by the pump 10. When introducing the liquid into the tower 1, subject components in the liquid are reacted with magnetic particles bound magnetically to a vessel 7 and 9 both packed with fine magnetic wires. And, the liquid deprived of the aimed components by magnetic particles is discharged from the upper part 12 of the tower. The regeneration of magnetic particles is carried out by introducing the liquid into the upper part 12 of the packed tower after a certain hour after use, discharging it from the lower part 11, and then introducing it into the regenerating magnetic packed tower 23. In this case, the passage of electricity to the magnetic generator 6 is stopped or weakened and electricity is passed to the regenerating magnetic generator 24 in order to arrest magnetic particles which are bound in the magnetic fine wire packed tank 7 by the magnetic fine wire 25 for treatment.

50. 发明专利

JPS54137416A SEA WATER URANIUM RECOVERY APPARATUS 失效
公开(公告)号：JPS54137416A
公开(公告)日：1979-10-25
申请号：JP4536378
申请日：1978-04-19
申请人： HITACHI LTD
发明人： FUJITA KAZUNORI , YAMASHITA HISAO , OZAWA YOSHIHIRO , MAEKOYA CHIAKI , NAKASHIMA FUMITO
IPC分类号： C22B60/02 , B01D15/02
摘要： PURPOSE:To perform the recovery of uranium present in the sea water by utilizing the force of tide current by the procedure in which a floating tank provided with a desorption liquid tank, a regenerating liquid tank, a water-washing tank for U- adsorbent, and then by circulating an U-adsorbent through the sea water and the aforesaid tanks by the force of tide current. CONSTITUTION:The upper part of the floating tank 10 is provided with the desorption liquid tank 2, the regenerating liquid tank 3, and the water-washing tank 4 for uranium(U) adsorbent, and the U-adsorption belt with a number of blades 9 is rotated endlessly while being circulated through the sea water and a series of the aforesaid tanks 2, 3, and 4 by using the pulley 1 and the rotator 17. In this case, since the floating tank 10 is moored to the sea bottom by the mooring chain 11, the tide current collids with the blades 9 and thereby the adsorption belt 8 is rotated. The adsorbent, composed of the binary hydrate Ti-Fe oxides, is then treated with (NH4)2CO3, Na2CO3, etc., to desorp U in the desorption liquid tank 2, and then substances other than U are desorped by a mineral acid, e.g., hydrochloric acid, etc., in the regenerating liquid tank 3 to regenerate the adsorbent. The adsorbent is washed with water and reused for U adsorption.

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