专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

11. 发明专利

JPS6046390B2 失效
公开(公告)号：JPS6046390B2
公开(公告)日：1985-10-15
申请号：JP6878676
申请日：1976-06-14
申请人： HITACHI LTD
发明人： HIRAKAWA HIROMASA , KAWAHARA AKIRA , MAKI HIDEO , MIKI MINORU
IPC分类号： G21C5/00 , G21C1/08 , G21C3/14 , G21C3/32 , G21C3/324

12. 发明专利

JPS551981A WELD JOINT METHOD OF STAINLESS STEEL PIPES 失效
公开(公告)号：JPS551981A
公开(公告)日：1980-01-09
申请号：JP2557179
申请日：1979-03-07
申请人： HITACHI LTD
发明人： ENOMOTO KUNIO , KUSUMOTO AKIRA , ITOU YOSHIYASU , KOIKE HIROSHI , SASAKI RIYOUICHI , MIKI MINORU
IPC分类号： B23K9/23 , F16L13/02
摘要： PURPOSE:To prevent occurrence of stress corrosion crack in weld sensitized zone, by applying solution heat treatment to specified part of butt part of steel pipe with specific metal after build-up welding, and butt-welding. CONSTITUTION:In welding of austenite base stainless steel pipe 1 to be filled with corrosive material in piping, a build-up weld part 4 of anti-corrosive metal (such as SUS316L, SUS321, etc.) being lower in susceptibility to stress corrosion crack than the pipe 1 is provided on the interior face of the end part of the pipe 1 in the thickness of q for the range up to heat affected zone l due to butt-welding, and solution heat treatment is carried out for 30 minutes at 1050 deg.C to recover the anti- corrosive property of the sensitized part. Next, a beveling 6 is provided, and butt- welding with the same metal as in the previous build-up welding is performed. Since the sensitized parts 3, 3A are covered with build-up weld parts 4, 4', occurrence of stress corrosive crack may be completely prevented.

13. 发明专利

JP2523696B2 失效
公开(公告)号：JP2523696B2
公开(公告)日：1996-08-14
申请号：JP25971187
申请日：1987-10-16
申请人： HITACHI LTD
发明人： IBE HIDEFUMI , KARASAWA HIDETOSHI , NAGASE MAKOTO , SAKAGAMI MASAHARU , UCHIDA SHUNSUKE , MIKI MINORU
IPC分类号： G21C13/08 , G21C3/06 , G21C17/02 , G21C19/30 , G21C19/307 , G21D1/00 , G21D3/08

14. 发明专利

JPH0471477B2 失效
公开(公告)号：JPH0471477B2
公开(公告)日：1992-11-13
申请号：JP2235487
申请日：1987-02-04
申请人： HITACHI LTD
发明人： MIKI MINORU , MORISHIMA HIDEHO , HORIUCHI TETSUO , TOMINAGA KENJI
IPC分类号： G21C13/00 , G21C9/004

15. 发明专利

JPS6375694A NUCLEAR REACTOR CONTAINER 失效
公开(公告)号：JPS6375694A
公开(公告)日：1988-04-06
申请号：JP21946986
申请日：1986-09-19
申请人： HITACHI LTD
发明人： SHINNO TAKESHI , MIKI MINORU , OCHIAI KANEHIRO , SHIOZAWA AKIHIKO , UCHIYAMA YUICHI
IPC分类号： G21C9/004 , G21C9/00 , G21C13/00

16. 发明专利

JPS56131083A WELDED JOINT METHOD FOR STAINLESS STEEL TUBE 失效
公开(公告)号：JPS56131083A
公开(公告)日：1981-10-14
申请号：JP15866780
申请日：1980-11-10
申请人： HITACHI LTD
发明人： ENOMOTO KUNIO , KUSUMOTO AKIRA , ITOU YOSHIYASU , KOIKE HIROSHI , SASAKI RIYOUICHI , MIKI MINORU
IPC分类号： B23K9/23 , B23K33/00 , B23K35/00
摘要： PURPOSE:To manufacture a stainless steel tube joint which can prevent a stress corrosion cracking without requiring a post treatment, by previously performing build-up welding with a anticorrosion metal on the internal circumferential surface of the edge of the coupling part of a stainless steel tube, and then by performing butt welding at the tube end. CONSTITUTION:Over the entire internal circumferential surface of stainless steel tube 1 extending from the tube end by length (l), built-up part 2 made of anticorrosion metal of thickness (q) is provided by welding. After the build-up welding, shot peening or roll work is carried out at build-up part 2 and its circumference. As a result, layer 3 given the residual stress of compression is formed on the surface. The edges of this tube 1 and tube 1A of the same structure are formed and butted for coupling at weld zone 4 of low-carbon stainless steel, thereby obtaining a tube joint. Of this tube joint, the metallurgically sensitized part generated in the formation of weld zone 4 is covered with build-up parts 2 and 2A, so that stress corrosion cracking is prevented.

17. 发明专利

JPS5439791A OPERATION METHOD OF REACTOR 失效
公开(公告)号：JPS5439791A
公开(公告)日：1979-03-27
申请号：JP10614977
申请日：1977-09-02
申请人： HITACHI LTD
发明人： OOSUMI KATSUMI , MIKI MINORU
IPC分类号： G21D3/08 , G21C7/00 , G21C19/28
摘要： PURPOSE:To prevent the generation of stress corrosion cracking and to improve the safety, by means os allowing the dissolved oxygen concentration degree and the dissolved hydrogen peroxide concentration degree in the coolant within a reactor vessel when the reactor is in the transiting operation time of start or stop. CONSTITUTION:The starting of a reactor due to the withdrawing of the control rod, is allowed to be started after a vacuum of a condenser 15 is attained, and after the dissolved oxygen concentration degree in the cooled water of the reactor vessel 6 becomed below a prescribed value (about 0.2 ppm.) by means of operating a venting of 2-4 hours in an opened state of a by-pass valve 21 of a turbine of a turbine by-path line 9 connected to a main drain line 10 and at the same time to a main steam separating valve 8 and a main steam line 7 without interposing of turbines 13, 14. And for the purpose of preventing the termporal uprising of the concentration degrees of hydrogen peroxyde and oxygen of the core water immediately after the starting, the neuclear heating is started after the core water to be raised at about 150 deg.C by the heating of a pump after the venting operation.

18. 发明专利

JPS5343199A DISCHARGE SYSTEM MAKING LIQUID WASTE FROM ATOMIC POWER PLANT ZERO 失效
公开(公告)号：JPS5343199A
公开(公告)日：1978-04-19
申请号：JP11713676
申请日：1976-10-01
申请人： HITACHI LTD , HITACHI SERVICE ENG
发明人： KOMODA NORIHISA , YAJIMA TAKASHI , MIKI MINORU , SAITOU MICHIO , ARIMA SHIYOUICHI , NAKASHITA FUMIO
IPC分类号： C02F1/04 , G21F9/00 , G21F9/06 , G21F9/08
摘要： PURPOSE:To reuse by purifying radioactive liquid waste from an atomic power installation, and to discharge to the atmospheric air by changing excess water into steam.

19. 发明专利

JPS63279199A LOAD FOLLOW-UP CONTROL OF BOILING WATER TYPE NUCLEAR POWER GENERATION PLANT 失效
公开(公告)号：JPS63279199A
公开(公告)日：1988-11-16
申请号：JP11346487
申请日：1987-05-12
申请人： HITACHI LTD
发明人： YAGI HIROYUKI , HIROSE MASAO , MIKI MINORU
IPC分类号： G21D3/12
摘要： PURPOSE:To achieve a load follow-up operation without lowering generation efficiency so much in a boiling water type nuclear reactor of natural circulation, by providing a bypass line to a condenser via a bypass valve for output control and a feed heater from a main steam pipe. CONSTITUTION:In a power generation plant which uses a boiling water type nuclear reactor 1 (of natural circulation) having no control means of a core flow rate, steam of a main steam pipe 13 is sent to a turbine 3 via a steam control valve 10 and circulated to the reactor 1 via a pump 4, a water feed pipe 36 and the like after being condensated with a condenser 2. A turbine bypass line 12A is provided to send steam of the main steam pipe 13 to the condenser 2 via a turbine bypass valve 12 for output control and a feed heater 35. The opening of the valve 12 is adjusted according to a load follow-up signal 20, thereby allowing a load follow-up control without affecting a nuclear reactor pressure remarkably. Steam sent to the condenser 2 through the valve 12 restores heat energy to feed water with the feed heater 35 in the course thereof, thereby preventing the lowering of generation efficiency.

20. 发明专利

JPS63191096A NUCLEAR REACTOR STORAGE FACILITY 失效
公开(公告)号：JPS63191096A
公开(公告)日：1988-08-08
申请号：JP2235487
申请日：1987-02-04
申请人： HITACHI LTD
发明人： MIKI MINORU , MORISHIMA HIDEHO , HORIUCHI TETSUO , TOMINAGA KENJI
IPC分类号： G21C13/00 , G21C9/004

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