专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

41. 发明专利

JP2002048891A CORE OPERATION CONTROLLER 失效
公开(公告)号：JP2002048891A
公开(公告)日：2002-02-15
申请号：JP2000236742
申请日：2000-08-04
申请人： HITACHI LTD
发明人： SONEDA HIDEO , MORIYA KIMIAKI , GOTO YUKINORI , YASUDA KENICHI
IPC分类号： G21C7/08 , G21C7/26 , G21C17/00
摘要： PROBLEM TO BE SOLVED: To increase a load factor in operation conditions satisfying the thermal margin limit value of the core in cycle operation after startup of a boiling water reactor. SOLUTION: In a core operation controller controlling the power of the boiling water reactor 1 by controlling the control rods 3 position in the core and a core flow 8, a core performance calculation means 11 periodically calculating an operating minimum critical power ratio (MCPR) based on the results of three dimensional power distribution in the core, an automatic thermal limit monitoring means 12 monitoring whether proper margin is maintained by comparing the operation MCPR with a target MCPR set in advance, and an automatic power control means 13 outputting signals changing core flow by changing core flow rate or the control rods to a recirculation flow controlling system 14 and a control rod drive control system 15 so that operation MCPR margin proper for the target MCPR is maintained, are provided.

42. 发明专利

JPH10274687A BOILING WATER REACTOR AND ITS OPERATION METHOD 失效
公开(公告)号：JPH10274687A
公开(公告)日：1998-10-13
申请号：JP7955597
申请日：1997-03-31
申请人： HITACHI LTD
发明人： YAMASHITA JUNICHI , MORIYA KIMIAKI , HAIKAWA KATSUMASA , MASUHARA YASUHIRO , TAKII TAICHI , YAMANAKA AKIHIRO , KONDO TAKAO , AOYAMA TADAO , CHAGI MASAO
IPC分类号： G21C5/00 , G21C7/00 , G21C7/08 , G21C7/113
摘要： PROBLEM TO BE SOLVED: To provide control rods securing sufficient control rod value without significant modification of a facility and without increase of a production cost. SOLUTION: A long wing control rod 6 having control rod wings extending in four directions is disposed between channel boxes on the opposite angle of a square bundle area constituted of a fuel assembly 2 surrounded the four channel boxes 1. A short wing control rod 7 in which the length of the control rod wing is the same degree as the width of the fuel assembly 2 is disposed between the channel boxes of the center of the square bundle area.

43. 发明专利

JPH1090473A REACTOR, FUEL ASSEMBLY AND NEUTRON MEASURING SYSTEM 失效
公开(公告)号：JPH1090473A
公开(公告)日：1998-04-10
申请号：JP24013896
申请日：1996-09-11
申请人： HITACHI LTD
发明人： CHAGI MASAO , MURASE MICHIO , ZUIKEIRAN ATSUSHI , MORIYA KIMIAKI
IPC分类号： G21C3/06 , G21C3/20 , G21C3/326 , G21C3/34 , G21C17/12
摘要： PROBLEM TO BE SOLVED: To attain increase of freedom of reactor operation and improvement in economy by coating different kinds of material on each water rod inner surface, discriminating the radiation energy of emitted from nuclear reaction materials and obtaining the intensity from the signal of radiation detectors in neutron instrumentation tubes. SOLUTION: Compared with the conventional measurement obtaining only information on neutron flux at the position of neutron instrumentation tubes 20, the present system obtains neutron flux at the center position of 4 fuel assemblies 90 with neutron instrumentation tubes 20 of the same number as before. Therefore with the same number of neutron instrumentation tubes 20, neutron flux of 4 times of conventional one can be measured. By this, the thermal limit value as the power of thermal limit value monitoring device is made to have more margin. Thus, freedom of reactor operation is increased. By utilizing this freedom, power increase is made possible and reactor economy can be improved.

44. 发明专利

JPH09264983A REACTOR CORE AND FUEL ASSEMBLY 失效
公开(公告)号：JPH09264983A
公开(公告)日：1997-10-07
申请号：JP7359796
申请日：1996-03-28
申请人： HITACHI LTD
发明人： TAKII TAICHI , SONEDA HIDEO , MORIYA KIMIAKI , AOYAMA TADAO , SHIMADA HIDEMITSU
IPC分类号： G21C5/00 , G21C3/328
摘要： PROBLEM TO BE SOLVED: To obtain a reactor core capable of being reduced in size a plant without decreasing the output of a reactor power plant by a constitution that the effective heating length of a fuel assembly is less than specific value and the output density of the heating amount per unit volume is larger than the specific value. SOLUTION: A fuel assembly having an effective heating length of 3.1m is loaded in a square lattice state having a lattice interval of 23.2cm, a control rod 3 having a cross-shaped section is inserted into the water gap area 2 of a fuel assembly periphery of both sides of a pair of diagonal lines of the assembly surrounded by a channel box 1 having a length of one inside of 20.9cm to constitute a reactor core, and output is controlled. Further, when the void ratio of cooling water in the box in which a water rod is removed is 40%, the ratio of the number of atoms of hydrogen to that of uranium is about 4.1. Thus, the output density of the core can be set to about 55kW/L while obtaining the allowance of reactor stop. The partial length fuel rod is located to reduce the pressure loss.

45. 发明专利

JPS61155794A SHIELDING OPEN-CLOSE STRUCTURE OF THROUGH-PORT 失效
公开(公告)号：JPS61155794A
公开(公告)日：1986-07-15
申请号：JP27765984
申请日：1984-12-27
申请人： HITACHI LTD
发明人： NAKAYAMA TAKASHI , YAMANARI SHOZO , TAKASHIMA YOSHIE , MORIYA KIMIAKI
IPC分类号： G21D1/00 , G21C13/00 , G21C13/02 , G21F7/005

46. 发明专利

JPS61105488A Ventilating device for turbine housing 失效
标题翻译：用于涡轮机外壳的通风装置
公开(公告)号：JPS61105488A
公开(公告)日：1986-05-23
申请号：JP22725584
申请日：1984-10-29
申请人： Hitachi Ltd
发明人： TOTSUKA FUMIO , TSURUOKA RYOZO , MORIYA KIMIAKI , YAMANARI SHOZO
IPC分类号： G21C13/00
CPC分类号： Y02E30/40

47. 发明专利

JPS59138990A Loss-of-coolant accident detecting logic 失效
标题翻译：冷却故障检测逻辑
公开(公告)号：JPS59138990A
公开(公告)日：1984-08-09
申请号：JP1280883
申请日：1983-01-31
申请人： Hitachi Ltd , Hitachi Eng Co Ltd
发明人： YAMANARI SHIYOUZOU , TAKAHASHI SUSUMU , MORIYA KIMIAKI , KUBOTA RIYUUJI
IPC分类号： G21C17/003 , G21C17/00

48. 发明专利

JPS58182588A Main steam escape safety valve 失效
标题翻译：主蒸汽安全阀
公开(公告)号：JPS58182588A
公开(公告)日：1983-10-25
申请号：JP6525882
申请日：1982-04-21
申请人： Hitachi Ltd
发明人： MORIYA KIMIAKI , HORIUCHI TETSUO
IPC分类号： G21D1/00 , G21C9/00 , G21D3/04
CPC分类号： Y02E30/40

49. 发明专利

JPS57141514A WATER LEVEL MEASURING DEVICE 失效
公开(公告)号：JPS57141514A
公开(公告)日：1982-09-01
申请号：JP2629581
申请日：1981-02-25
申请人： HITACHI LTD
发明人： MORIYA KIMIAKI , YAMASHIGE SHIYOUZOU
IPC分类号： G01G23/14 , G01F23/00
摘要： PURPOSE:To facilitate an easy conversion of water level and to eliminate the effect of a temperature change of the open air, by attaching forcible circulating cooling mechanism to an instrumental pipeline that measures the water head differential pressure. CONSTITUTION:A forcible circulating cooling pipe 13 is wound spirally around the outer circumference of an instrumental pipeline 11 connected to a condensation tank 15. A heat insulating material 18 is coated over the tank 15 and around the outer circumference of the pipe 13. The saturated steam is supplied in Y direction from a boiler, and the cooling water is circulated into the pipe 13 in X direction. As a result, the water temperature is kept constant in the up- down direction of a reference water column 1 which exists within the pipeline 11 to avoid the effect of a temperature change of the open air. In such way, a result of measurement which facilitates an easy conversion of water level is obtained with high accuracy.

50. 发明专利

JPH10253796A FACILITY FOR CONTROLLING CONCENTRATION OF FLAMMABLE GAS AND METHOD FOR OPERATING THE SAME 失效
公开(公告)号：JPH10253796A
公开(公告)日：1998-09-25
申请号：JP5275397
申请日：1997-03-07
申请人： HITACHI LTD
发明人： YOSHIKAWA KAZUHIRO , ANDO KOJI , KINOSHITA SHIYOUICHIROU , YAMANARI SHOZO , MORIYA KIMIAKI , KARASAWA HIDETOSHI
IPC分类号： G21D3/08 , H01M8/00 , H01M8/06
摘要： PROBLEM TO BE SOLVED: To efficiently control the concentration of a flammable gas generated in a reactor containment vessel to a safe level. SOLUTION: A nuclear power generation plant including a reactor containment vessel 15 is equipped with a hydrogen electrode 3 which adsorbs hydrogen by using an electrolytic membrane 2 where hydrogen ions as an electrolyte are made a charge carrier and an air electrode 4 which absorbs the oxygen in the air. A fuel cell 1 which converts the recombination energy of hydrogen and oxygen into electric energy is installed inside or outside the containment vessel 15. Then, the plant is so constituted that the atmosphere in the containment vessel 15 is used as a hydrogen supplying source and a gas containing oxygen such as the air outside the containment vessel as an oxygen supplying source. Should a hydrogen gas be generated in the containment vessel 15, the concentration of the hydrogen gas in it is regulated through the energy converting action of the fuel cell 1.

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