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41. 发明专利

JPS6488334A METHOD AND DEVICE FOR TESTING ACTUAL MACHINE ARTIFICIAL PIPING 失效
公开(公告)号：JPS6488334A
公开(公告)日：1989-04-03
申请号：JP24705787
申请日：1987-09-30
申请人： HITACHI LTD
发明人： MATSUNOBU TAKASHI , SUEYOSHI NORIKIMI , ISHIKAWA KIYOSHI , AIZAWA KENJI , ANAZAWA KAZUMI
IPC分类号： G01N3/20 , G01N3/34
摘要： PURPOSE:To securely simulate the stress state of the piping of an actual machine by using a simple device by applying displacement to the support point of the artificial piping and simulating the actual machine. CONSTITUTION:Test piping which has cracking made by discharge working, etc., is fitted at a specific position of an artificial entrance pipe 11, and a boiler 15 is operated manually so as to obtain the same temperature and pressure with the operation state of a new type converter. In this state, high-temperature, high-pressure water is made to flow through a bias pipe 17. Then frame displacement data is extracted from a frame displacement directory and displacement is caused by a displacement adding mechanism 12 according to the data. Then solenoid valves 110 and 111 are opened to admit the high-temperature, high-pressure water in the pipe 11. In this state, the device is left as it is until the flow in the pipe 11 becomes stable and a solenoid valve 113 is closed to stop the flow of the high-temperature, high-pressure water to the pipe 17. In this state, a solenoid valve 112 is closed to quit the venting from the vent pipe 18 almost at the same time through the operation of a timer after input signals from void meters 50 and 51 decrease below a 50% void rate while the air in an artificial pressure pipe 13 is discharged.

42. 发明专利

JPS62189000A METHOD OF CUTTING CONTAMINATED PIPING AND DEVICE USING SAID METHOD 失效
公开(公告)号：JPS62189000A
公开(公告)日：1987-08-18
申请号：JP3026386
申请日：1986-02-14
申请人： HITACHI LTD
发明人： ANAZAWA KAZUMI , ISHIKAWA KIYOSHI , AIZAWA KENJI
IPC分类号： G21F9/30 , B23D21/00 , G21C19/02 , G21F9/00

43. 发明专利

JPS6280599A METHOD OF PROCESSING CONSTRUCTION OF RADIOACTIVE PIPING 失效
公开(公告)号：JPS6280599A
公开(公告)日：1987-04-14
申请号：JP22013985
申请日：1985-10-04
申请人： HITACHI LTD
发明人： ANAZAWA KAZUMI , ISHIKAWA KIYOSHI , AIZAWA KENJI , OYAMADA TSUGIO , MICHISHITA HIDENORI
IPC分类号： G21F9/30 , B09B1/00 , B09B3/00 , B09B5/00 , G21F9/00 , G21F9/36

44. 发明专利

JPS60155995A PRESSURE TUBE TYPE REACTOR 失效
公开(公告)号：JPS60155995A
公开(公告)日：1985-08-16
申请号：JP1251184
申请日：1984-01-25
申请人： HITACHI LTD
发明人： AIZAWA KENJI , TANABE MASAHIKO , YOSHIDA YOSHIO , ANAZAWA KAZUMI , SUEYOSHI NORIKIMI , ISHIKAWA KIYOSHI , OGUCHI ISAO , KAWAHARA MASARU
IPC分类号： G21C1/20 , G21C11/02

45. 发明专利

JPS60120290A FUEL EXCHANGER FOR PRESSURE PIPE TYPE REACTOR 失效
公开(公告)号：JPS60120290A
公开(公告)日：1985-06-27
申请号：JP22689383
申请日：1983-12-02
申请人： HITACHI LTD
发明人： AIZAWA KENJI , TANABE MASAHIKO , YOSHIDA YOSHIO , ANAZAWA KAZUMI , SUEYOSHI NORIHIRO , ISHIKAWA KIYOSHI , OGUCHI ISAO , KAWAHARA MASARU
IPC分类号： G21C19/19

46. 发明专利

JPH11139885A FUNCTIONALLY GRADIENT COMBINED BODY AND ITS USE 失效
公开(公告)号：JPH11139885A
公开(公告)日：1999-05-25
申请号：JP30158297
申请日：1997-11-04
申请人： HITACHI LTD
发明人： OKADA OSAMU , NAKADA KIYOTOMO , SAKAI MASANORI , ANAZAWA KAZUMI
IPC分类号： G21B1/11 , B32B5/00 , B32B7/00 , C04B37/02 , G21B1/00 , G21B1/25
摘要： PROBLEM TO BE SOLVED: To ensure high thermal stress relieving characteristics and high resistance to irradiation with neutrons by disposing a mixed layer of a sintered compact contg. ceramic fine particles dispersed in a matrix metal having a specified grain diameter or below between the joining parts of a metal and ceramics. SOLUTION: A mixed layer in which the ratio between a metal and ceramics varies continuously or stepwise is disposed between the joining parts of a metal and ceramics. The matrix metal of the mixed layer has

47. 发明专利

JPH07167821A ELECTROCHEMICAL MONITOR 失效
公开(公告)号：JPH07167821A
公开(公告)日：1995-07-04
申请号：JP31522793
申请日：1993-12-15
申请人： HITACHI LTD
发明人： HOSAKA NOBUYOSHI , ISHIKAWA YUICHI , KIMOTO HIROSHI , DOGE HIDENORI , ANAZAWA KAZUMI , SUZUKI KENICHI
IPC分类号： G01N27/26 , G01N27/30 , G01N27/416 , G21C17/02
摘要： PURPOSE:To enable the detection of the concentration of hydrogen ions or the like of a high temperature/high pressure water. CONSTITUTION:In an electrochemical monitor which is provided with a collation electrode and a semiconductor electrode 3 housed into a box body formed in a shape of an insulation tube allowing the inflow of a high temperature/high pressure water and to be disposed through an opposed pole to detect at least the concentration of hydrogen ions of the high temperature/high pressure water, the semiconductor electrode 3 is produced as follows: copper is welded on a semiconductor 11 comprising TiO2 or ZrO2 as electrode terminal 12 and the entire surface of a part other than that welded in diffusion is insulated and covered. A corrosion value of metal follows a generation value of hydrogen, which enables the monitoring of corrosion and the estimating of a metal absorption value of metal by measuring the concentration of hydrogen ions in the high temperature/high pressure. This also allows the estimating of a corrosion rate of metal from a corrosion potential and a measured value of impedance.

48. 发明专利

JPH04279900A DECOMMISSIONING OF REACTOR 失效
公开(公告)号：JPH04279900A
公开(公告)日：1992-10-05
申请号：JP4216391
申请日：1991-03-08
申请人： HITACHI LTD
发明人： ANAZAWA KAZUMI , MATSUNOBU TAKASHI , ISHIKAWA KIYOSHI
IPC分类号： G21F9/28 , G21F9/30
摘要： PURPOSE:To obtain a working method of reactor decommissioning suitable for reducing the dangerous factor of bringing contaminated material into the body of a worker or of exposure by reducing the expansion of contamination. CONSTITUTION:Prior to decommissioning work of a reactor, a process is carried out in which a water paint 17 is flown entirely into the four corners of a primary cooling system, to which a radioactive material 18 is adhered, so as to provide coating on the inner surface of a steel structure 16 in the primary cooling system. The control of line source at the time of decommissioning and capacity reduction of the reactor is facilitated, and exposure of a worker is reduced to a large degree.

49. 发明专利

JPH0288998A WORKING METHOD IN HIGH-RADIATION DOSE RATE AREA 失效
公开(公告)号：JPH0288998A
公开(公告)日：1990-03-29
申请号：JP24045188
申请日：1988-09-26
申请人： HITACHI LTD
发明人： ANAZAWA KAZUMI , ISHIKAWA KIYOSHI , MATSUNOBU TAKASHI
IPC分类号： G21F3/00
摘要： PURPOSE:To damp the quantity of gamma rays radiated from a radioactive material adhering to the inner surface of a vessel so as to reduce the exposure of a worker by filling up a pipeline and vessel of high in radiation dose rate with water. CONSTITUTION:Since radioactive materials of Co activated at a reactor core section adhere to whole inner surfaces of primary cooling pipelines 4 and 6 and vessels 3 and 5 of the reactor 1 of an atomic power plant, the whole inner surfaces of the pipelines 4 and 6 and vessels 3 and 5 become radiation sources. Therefore, a worker 11 working in the vicinity of the pipelines 4 and 6 and vessels 3 and 5 is exposed to the radiation radiated from the sources. However, since gamma rays interact with the molecule and atom of a substance and become weaker when the gamma rays are passed through the substance, not only the metallic materials constituting the pipelines 4 and 6 and vessels 3 and 5, but also the fluid contained in the pipelines and vessels can exert shielding effects in accordance with their densities. Therefore, the pipelines 4 and 6 and vessels 3 and 5 which are high in radiation dose rate adjacent to the working area are filled up with a fluid which can effectively shield gamma rays before starting the work. Thus the quantity of exposure of the worker 11 can be reduced.

50. 发明专利

JPS61192994A HEAT INSULATOR FOR PIPE 失效
公开(公告)号：JPS61192994A
公开(公告)日：1986-08-27
申请号：JP3043085
申请日：1985-02-20
申请人： HITACHI LTD
发明人： AIZAWA KENJI , ANAZAWA KAZUMI , ISHIKAWA KIYOSHI
IPC分类号： F16L59/05 , F16L59/06 , F16L59/12

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