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1. 发明专利

JPH07159575A ATOMIC REACTOR OUTPUT CONTROL DEVICE 失效
公开(公告)号：JPH07159575A
公开(公告)日：1995-06-23
申请号：JP30374793
申请日：1993-12-03
申请人： HITACHI LTD , HITACHI NUCLEAR ENG
发明人： NOZAKI TAKESHI , ISHIDA TAKAYUKI , KAWASAKI TAKEHIDE
IPC分类号： G21C7/08 , G21D3/00 , G21D3/04
摘要： PURPOSE:To reduce overshoot by suppressing a rise of the reactor output due to a disturbance such as a momentary power stoppage, avoiding an unnecessary scram of the reactor, and setting down the reactor output set value immediately after the occurrence of the disturbance. CONSTITUTION:This atomic reactor output control device feeds a bus voltage low signal 14 to a control rod control device 100, sets the switch of a switching function 105 to the selection (a), and sets down the reactor output set value to avoid an unnecessary scram of the reactor. After a disturbance is recovered, the switch of the switching function 105 is set to the selection (b) and a switching function 109 is set to the selection (a) by the AND condition of a reactor output set-down set value 112, a re-circulating pump rating 113, and the bus voltage low signal 14, and thereby, reactor output is recovered.

2. 发明专利

JPH11173940A METHOD AND DEVICE FOR ACOUSTICALLY DETECTING LEAKAGE 失效
公开(公告)号：JPH11173940A
公开(公告)日：1999-07-02
申请号：JP34526797
申请日：1997-12-15
申请人： HITACHI LTD
发明人： YAMADA IZUMI , OKADA SATOSHI , KASHIWAKURA JUN , ISHIDA TAKAYUKI
IPC分类号： G01M3/24 , G21C17/00 , G21C17/025
摘要： PROBLEM TO BE SOLVED: To improve the operational reliability of a plant by preventing malfunction of an acoustic leakage detector by realizing such a leakage monitoring function that is sensible to the occurrence of bubbles in an SG container without responding to the waveform variation of received acoustic waves caused by the operating condition. SOLUTION: The acoustic leakage detecting device is composed of transmitting sound sensors 11t and 12t and receiving sound sensors 11a, 11b, 12a, and 12b installed to the barrel 7 of an SG container, an acoustic wave generation controller 200, and a leakage detector 300. Thereby, the reliability of the operation, etc., of a plant can be improved because such leakage detection that is sensible to the variation of noise, etc., and to the occurrence of bubbles in the SG container becomes possible.

3. 发明专利

JPH01134572A DISPLAY DEVICE FOR OPERATION INFORMATION 失效
公开(公告)号：JPH01134572A
公开(公告)日：1989-05-26
申请号：JP29208487
申请日：1987-11-20
申请人： HITACHI LTD
发明人： SUZUKI TOSHIYUKI , WATANABE TAKAO , ISHIDA TAKAYUKI
IPC分类号： G05B23/02 , G06F3/048 , G06F3/14 , G06F17/30
摘要： PURPOSE:To omit an operation where information retrieved once is retrieved again by displaying plural types of information required by an operator of a power plant, etc., at one time or alternately. CONSTITUTION:The information on the operation of a power plant is registered in a memory part 3. Then the desired information is registered in an auxiliary memory 5 and displayed at a display part 4 when an operator inputs a keyword of the desired information to a retrieving part 2 via an operation part 1. Other desired information can also be displayed in the same way. In this case, the corresponding information are switched by a switch part 6 and displayed with push of keys corresponding to plural auxiliary memories 5 of the part 1. Furthermore, the part 4 is divided into pieces in accordance with the number of memories 5. Thus the information registered in the memories 5 are all displayed.

4. 发明专利

JPS6332201A METHOD OF DETECTING LEAKAGE FROM HEAT TRANSFER TUBE 失效
公开(公告)号：JPS6332201A
公开(公告)日：1988-02-10
申请号：JP17367486
申请日：1986-07-25
申请人： HITACHI LTD
发明人： SUZUKI TOSHIYUKI , ISHIDA TAKAYUKI
IPC分类号： F22B1/06

5. 发明专利

JPS6256822A CALIBRATING AND TESTING METHOD FOR LIQUID SODIUM LEVEL GAUGE 失效
公开(公告)号：JPS6256822A
公开(公告)日：1987-03-12
申请号：JP19591085
申请日：1985-09-06
申请人： HITACHI LTD
发明人： ISHIDA TAKAYUKI , MAE YOSHINORI
IPC分类号： G01F25/00
摘要： PURPOSE:To easily set a reference liquid level in a short time and to perform calibration which is affected by neither the error nor secular change of the liquid level by closing all lines of drains below a target reference level among drains provided to a calibration tank. CONSTITUTION:Sodium is supplied from a dump tank 1 to the calibration tank 2 to take a calibration test. At this time, gaseous nitrogen is supplied from a cylinder 3 to the dump tank 1 through valves 4 and 6, a header 5, and a burper trap 7 and the sodium stored in the tank 1 is supplied to a tank 1 through piping 8 and a valve 9. The output signal of a reference level gauge 19 is outputted to a monitor device 12 and the valves 6 and 9 are closed on the basis of the indicated value when the specific level is reaches, thereby setting the liquid level of sodium. The output of the level gauge 13 to be calibrated is sent to the monitor device 15 through a processing circuit 14 and compared with the output signal of the level gauge 10 to perform calibration.

6. 发明专利

JPS6156992A Drive for control rod 失效
公开(公告)号：JPS6156992A
公开(公告)日：1986-03-22
申请号：JP17835484
申请日：1984-08-29
申请人： Hitachi Ltd
发明人： ISHIDA TAKAYUKI , WATANABE TAKAO
IPC分类号： G21C7/14 , G21C7/12
CPC分类号： Y02E30/39

7. 发明专利

JPS5973793A Control rod drive mechanism 失效
公开(公告)号：JPS5973793A
公开(公告)日：1984-04-26
申请号：JP18290782
申请日：1982-10-20
申请人： Hitachi Ltd
发明人： ASANO TAMOTSU , ISHIDA TAKAYUKI , IWASAKI TOSHIO
IPC分类号： G21C7/08 , G21D3/04
CPC分类号： Y02E30/39

8. 发明专利

JPH09264807A METHOD AND APPARATUS FOR MONITORING OF SOUND 失效
公开(公告)号：JPH09264807A
公开(公告)日：1997-10-07
申请号：JP7565296
申请日：1996-03-29
申请人： HITACHI LTD
发明人： YAMADA IZUMI , OKADA SATOSHI , ISHIDA TAKAYUKI , KASHIWAKURA JUN
IPC分类号： G01N29/00 , G01H3/00 , G01M3/24 , G01N29/20
摘要： PROBLEM TO BE SOLVED: To capture, with high sensitivity, whether a leakage sound is generated or not inside a monitoring region and to discriminate, with a small malfunction, whether a generation sound source exists or not. SOLUTION: The sound-source intensity of signals from a plurality of acoustic sensors 11 which are installed around an SG(steam generator) container shell 7 is computed by a high-speed signal processor 300, and effective-value data on a process signal and on an acoustic signal are computed by a low-speed A/DC (A/D converter.. In a sound detection device 400, the generation of a leakage sound or the like inside the monitoring region of the SG container shell 7 is detected and the position of the leakage sound is located on the basis of the sound-source intensity from the high-speed signal processor 300 and on the basis of the effective-value data on the process signal and on the acoustic signal from the low-speed A/DC. However, when the existence of the generation of the leakage sound or the like is monitored on the basis of the mean value of a sound-source intensity distribution from the high-speed signal processor 300, a sound source can be discriminated precisely even when the peak of the sound-intensity distribution is not clear. The sensitivity of an apparatus is increased, and the reliability of the operation or the like of a plant is enhanced.

9. 发明专利

JPS6398519A LIQUID METAL FLOW RATE MEASURING DEVICE OF HIGH SPEED BREEDER REACTOR 失效
公开(公告)号：JPS6398519A
公开(公告)日：1988-04-30
申请号：JP24299086
申请日：1986-10-15
申请人： HITACHI LTD
发明人： SUZUKI TOSHIYUKI , WATANABE TAKAO , ISHIDA TAKAYUKI
IPC分类号： G01F1/56
摘要： PURPOSE:To obtain the flow rate output and temp. output in an average flow speed region, by arranging an eddy current type flowmeter and a thermometer in the same well at the place in piping generating the average flow speed of a liquid metal. CONSTITUTION:A structure wherein a thermocouple type thermometer 19 is provided in the same well as an eddy current type flowmeter is incorporated in a measuring pipe 4. The output voltages from the secondary coils 9, 10 of the eddy current type flowmeter are converted by a flow rate converter 12 to be outputted to a temp. compensation device 21. The output signal from the thermocouple type thermometer 19 is converted by a temp. converter 20 to be outputted to the temp. compensation device 21. In the temp. compensation device 21, the signal from the flow rate converter 12 is compensated by the signal from the temp. converter 20 to be outputted as a flow rate signal improved in accuracy.

10. 发明专利

JPS59150517A Flow amount control apparatus 失效
标题翻译：流量控制装置
公开(公告)号：JPS59150517A
公开(公告)日：1984-08-28
申请号：JP2461983
申请日：1983-02-18
申请人： Hitachi Ltd
发明人： ISHIDA TAKAYUKI
IPC分类号： B01D37/04
摘要： PURPOSE: To stably supply raw water to fresh water supply equipment, by providing installation for always storing the recycle water of a plant while controlling the mixing ratio of the recycle water and the raw water from a water taking basin.
CONSTITUTION: After regenerated water 12 is used in a water condensing and desalting apparatus 9, it is stored in a condensate storage tank 16. When raw water 1 can not be sufficiently secured for a period of water shortage season, a control apparatus 19 takes in the flow amount signals from flow amount detectors 22, 23 and, in order to hold the flow amount ratio of the flow amount of the raw water 1 and that of the recycle water of a plant from the condensate storage tank 16 to a certain ratio, controls the opening degree of a valve 24. As a result, the raw water can be stably supplied to fresh water supply installation.
COPYRIGHT: (C)1984,JPO&Japio
摘要翻译：目的：为了稳定地向淡水供应设备供应原水，通过提供设备来始终存放设备的循环水，同时控制来自取水池的循环水和原水的混合比例。构成：再生水12在冷凝脱盐装置9中使用时，将其储存在冷凝水储存箱16中。当原水1不能充分固定一段时间的缺水季节时，控制装置19进入来自流量检测器22,23的流量信号，并且为了将来自冷凝水储存箱16的原料水1的原料水和循环水的流量的流量比保持一定比例，控制阀24的开度。结果，可以将原水稳定地供给到淡水供给装置。

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