专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 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.

2. 发明专利

JP2559527B2 失效
公开(公告)号：JP2559527B2
公开(公告)日：1996-12-04
申请号：JP20499090
申请日：1990-08-03
申请人： HITACHI SEISAKUSHO KK , HITACHI KYOWA KOGYO KK
发明人： AKAMINE KAZUHIKO , ICHIMURA AKIRA , BUSHI NORIAKI , OOSUMI KATSUMI , IBE HIDEFUMI , MIZUNIWA FUMIO
IPC分类号： G21C17/02 , G21D3/08

3. 发明专利

JPH09159795A PRIMARY COOLING SYSTEM OF BOILING WATER REACTOR 失效
公开(公告)号：JPH09159795A
公开(公告)日：1997-06-20
申请号：JP23614996
申请日：1996-09-06
申请人： HITACHI LTD
发明人： IBE HIDEFUMI , TAKAHASHI MASANORI , AOKI YASUKO , ASAKURA YAMATO , NAGASE MAKOTO , OONAKA NORIYUKI , SAKAI MASANORI , SAITO TAKASHI , OSUMI KATSUMI , AKAMINE KAZUHIKO , HAYASHI MAKOTO , NAKADA KIYOTOMO
IPC分类号： G21C17/02 , G21D1/00 , G21D3/08
摘要： PROBLEM TO BE SOLVED: To provide a water quality control system which makes effective use of the information of sensors to control the corrosive environment of a nuclear reactor. SOLUTION: A specific and universal water-quality factor in a specific part is regarded as a reference index, and the concentration of a water-quality softening agent is controlled so that the index can fall within the target range. For this purpose, all sensor groups placed in a primary reactor cooling system are divided in terms of lines whose piping places are different from each other, and a specific sensor group (standard sensor group) is connected to an arithmetic unit 6 and a database 7 to be used as a full-time monitor for the operation and projection of the reference index. Attention is paid only to an oxidizing component in the water at a measurement point, and a concentration distribution agreeing with an actual measurement of the oxidizing component is extracted and adopted as a correct concentration distribution. As a result, the fact that the control index is a universal quantity minimizes the change of the control logic even if changes occur in types and capabilities of sensors or references themselves, and the independence of a single sensor output allows us to expect the maintenance of high accuracy in the system.

4. 发明专利

JPH06265514A SENSOR FOR WATER QUALITY 失效
公开(公告)号：JPH06265514A
公开(公告)日：1994-09-22
申请号：JP5537393
申请日：1993-03-16
申请人： HITACHI LTD
发明人： ISHIZUKA KEIKO , TAKAHASHI MASANORI , WATANABE ATSUSHI , IBE HIDEFUMI
IPC分类号： G01N27/406 , G21C17/02
摘要： PURPOSE:To directly measure the concentration of oxygen, hydrogen peroxide in a reactor water under the radiation of radioactive rays by using an oxygen sensor which employs an ion conductive substance sufficiently capable of responding at temperatures in a reactor. CONSTITUTION:An ion conductive substance 1 is a metallic oxide using a solid electrolyte which sufficiently scatters in the temperature range from room temperatures to not higher than 300 deg.C, for example, Sc, Ti, V, Cr or the like. Electrodes 2 of thin films of Pt, Ag, etc., are attached at both sides of the ion conductive substance 1. A reference gas is housed at one side of the ion conductive substance 1 by an insulating body 3 and a material 4 having resistances to high temperatures and radioactive rays, e.g. stainless steel, an alloy of Ni base. The reference gas is communicated with a gas tank 6 from a piping 5 through, for instance, a capillary. The partial pressure of oxygen is kept to be constant at all times. The electrodes 2 are connected to a voltmeter 8 thereby to measure the electromotive force generated by the movement of ions.

5. 发明专利

JPH05100087A BOILING WATER REACTOR PRIMARY COOLING SYSTEM 失效
公开(公告)号：JPH05100087A
公开(公告)日：1993-04-23
申请号：JP26451291
申请日：1991-10-14
申请人： HITACHI LTD
发明人： IBE HIDEFUMI , TAKAHASHI MASANORI , AOKI YASUKO , ASAKURA YAMATO , NAGASE MAKOTO , OONAKA KIBOU , SAKAI MASANORI , SAITO TAKASHI , OSUMI KATSUMI , AKAMINE KAZUHIKO , HAYASHI MAKOTO , NAKADA KIYOTOMO
IPC分类号： G21C17/02 , G21C17/022 , G21D1/00 , G21D3/08
摘要： PURPOSE:To provide a water quality control system effectively using the information of multiple sensors to suppress the corrosive environment of a nuclear reactor. CONSTITUTION:A specific universal water quality factor at a specific portion is used as a reference index, and the concentration of a water quality relaxing agent is controlled so that the index falls within a target range. All sensor groups provided on a nuclear reactor primary cooling system are divided into sensor groups of multiple systems having different attaching positions of sensors, a specific sensor group (reference sensor group 1) is connected to an arithmetic device 6 and a data base 7 to calculate and estimate the reference index for continuous monitoring, only the underwater oxidizing constituent at the measurement point is noticed, and the concentration distribution coinciding with the measured value of the oxidizing constituent is extracted and employed from the data base 7 as the correct concentration distribution. Since the control index is a universal quantity, the change of the control logic can be minimized even if the type and capability of the sensor or the reference itself is changed, and the maintenance of high precision as a system can be expected because the control does not rely on a single sensor output.

6. 发明专利

JPH03262955A ANALYSIS APPARATUS FOR RADIOACTIVE GAS 失效
公开(公告)号：JPH03262955A
公开(公告)日：1991-11-22
申请号：JP6102090
申请日：1990-03-14
申请人： HITACHI LTD
发明人： KURIYAMA OSAMU , IBE HIDEFUMI , SUZUKI SADAJI
IPC分类号： G01N27/62 , H01J49/00
摘要： PURPOSE:To remove a steam component from the inside of an analysis gas and to allow the discriminated analysis of ammonia and OH molecules by providing an absolute lower alcohol layer in the front stage of a mass spectrograph and passing the analysis gas through the absolute alcohol layer. CONSTITUTION:While the pressure in the system is checked by a pressure gage, the analysis gas is filled into the system and the inside of a gas sampling tube 8 is evacuated by a vacuum pump 7. Valves 9, 10, 11 are closed and after the vacuum degree is checked, the valve 9 is opened again and a micro-flow rate control valve 12 is gradually opened to introduce the analysis gas into the sampling tube 8 until the pressure gage 13 registers a prescribed value. While the analysis gas bubbles in a chemical trap 18 filled with the absolute alcohol cooled down to -20 deg.C by a cooler 17, the moisture is absorbed in the absolute alcohol. The moisture in the analysis gas is decreased in such a manner and the NH3 and the OH molecule are discriminated. The moisture is, therefore, removed by such simple apparatus and the inexpensive absorbent.

7. 发明专利

JPH02198394A MAIN STEAM SYSTEM RADIOACTIVE NITROGEN MEASUREMENT DEVICE AND ITS MEASURING METHOD 失效
公开(公告)号：JPH02198394A
公开(公告)日：1990-08-06
申请号：JP1616689
申请日：1989-01-27
申请人： HITACHI LTD
发明人： IBE HIDEFUMI
IPC分类号： G01T1/167 , G21C17/00
摘要： PURPOSE:To control the exact assessment of the concentration and the chemical form of radioactive nitrogen by grab-sampling a constant quantity of steam to measure after the steam is condensed in inactive gas at one to several atmospheres at the position as near as it can reach a pressure vessel of a main steam tube. CONSTITUTION:At first, a conventional sampling system is operated to form a steady steam/water flow in a system of a condenser 3 to a sampling rack. A device 23 is connected through the upper branch 5 of the condenser 3 and a condenser 4 is filled with a gas of normal to several atmospheres beforehand. At the time when purging of a sampling tube 2 is finished, a valve 6 is closed to prevent the reverse flow of downstream water of the condenser 3 from being produced to open a valve 7 so as to take the steam in the condenser 4. The inner pressure is monitored by a pressure gauge 10 to close the valve 7 at the time when it becomes specified pressure so as to open the valve 6. A time is measured from the time when the valve 7 is opened or closed to perform exact time assessment.

8. 发明专利

JPH02179499A OPERATION OF NUCLEAR REACTOR AND ITS DEVICE 失效
公开(公告)号：JPH02179499A
公开(公告)日：1990-07-12
申请号：JP33476788
申请日：1988-12-28
申请人： HITACHI LTD
发明人： IBE HIDEFUMI , ASAKURA YAMATO , BABA TSUTOMU
IPC分类号： G21C17/02 , G21D3/08
摘要： PURPOSE:To contrive an improvement of a working efficiency of a nuclear reactor by detecting a leakage of an ion exchange resin into a reactor water and by reducing an oxygen generated in the reactor water from the leaked ion exchange resin with a reduction means to convert to an oxidized gas. CONSTITUTION:In case that leakage of an ion exchange resin in a reactor water purification system 1 provided to a pressure vessel 2 of a nuclear reactor occurs, a conductivity rises or a pH value decreases by a thermal decomposition of the resin at a downstream portion of a heat exchanger. The conductivity rise is detected by a conductivity monitor 13 to notify an in-leakage of the resin and a reducing agent is injected from an injecting device 10 of the reducing agent. Also, a catalyst is injected from an injecting device 14 of the catalyst, if required. Regarding to injection points, both injection points of the reducing agent and the catalyst are not necessary to be the same one but may be provided at a feed water system, the reactor water purification system 1, a cooling system for a control rod drive mechanism 6, a high/low pressure core injection system 7 and so on. A gas generated by an injection of the reducing agent is converted into a form of a safe gas and is discharged outside a system, accompanied with a steam.

9. 发明专利

JPH0222899B2 失效
公开(公告)号：JPH0222899B2
公开(公告)日：1990-05-22
申请号：JP4263482
申请日：1982-03-19
申请人： HITACHI LTD
发明人： IBE HIDEFUMI
IPC分类号： G01N27/26 , G01N17/00 , G01N17/02 , G01N27/416 , G21C17/02

10. 发明专利

JPH0213895A DIRECT CYCLE NUCLEAR POWER PLANT 失效
公开(公告)号：JPH0213895A
公开(公告)日：1990-01-18
申请号：JP16253288
申请日：1988-07-01
申请人： HITACHI LTD
发明人： TAGAWA HISATO , IBE HIDEFUMI
IPC分类号： G21C19/307 , G21C19/30 , G21D1/00 , G21D3/08
摘要： PURPOSE:To prevent a generation of N in a nuclear reactor by adding a metal reacting quickly with a hydrogen to a reactor water and therewith decreasing concentration of hydrogen atoms in the reactor water. CONSTITUTION:Metal rods 3 made of metals such as a silver, a chromium, a ruthenium and the like which react quickly with a hydrogen are inserted into a fuel assembly 2 in place of fuel rods so as to make those metallic ions dissolve into the reactor water. The N is discharged to a main steam in the chemical form of NO and when a concentration of hydrogen atoms increases, a discharged amount of the NO increases also. With the reason that the N in a main steam system can be diminished by decreasing the concentration of hydrogen atoms and by suppressing a reaction of NO2+H NO+OH, the concentration of hydrogen atoms in the reactor water decreases and the above-mentioned reaction is suppressed by adding the metallic ions which react quickly with hydrogen atoms as explained above, and as the result, the N decreases.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式