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1. 发明专利

JP2001042083A AUTOMATIC CALIBRATION DEVICE OF INCORE NEUTRON FLUX MEASURING DEVICE 失效
公开(公告)号：JP2001042083A
公开(公告)日：2001-02-16
申请号：JP21516599
申请日：1999-07-29
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： NOZAKI TAKESHI , ISHII KAZUHIKO , ARITA SETSUO , HASEGAWA MAKOTO , SHIRAGAMI HISASHI , YAMANAKA AKIHIRO
IPC分类号： G21C17/108 , G21C17/10
摘要： PROBLEM TO BE SOLVED: To calculate an alternative value of a γ-ray temperature meter even in the case of function loss of the γ-ray temperature meter and maintain the accuracy of monitoring of core power distribution. SOLUTION: In the case where detector assemblies (marked with circles) including γ-ray temperature meter assembly and local power detector assembly in the same string (cross section seeing the core from above) are arranged in symmetrical positions of 45 degree line 100, the power distributions of detector assemblies 1 and 1a put at symmetrical positions of the 45 degree line 100. In this case, the values of the γ-ray temperature meters and the local power detectors in the detector assembly 1 and the detector assembly 1a are nearly equal, and so in the case where the γ-ray temperature meter in the detector assembly 1 lost the function, the value of the γ-ray temperature meter in the detector assembly 1a is set to use as substitute of the γ-ray temperature meter in the detector assembly 1 of which function is lost. By using the substitute value, the calibration of the local power detector belonging to the same detector assembly is possible and the number of the local power detectors for monitoring the core state is ensured.

2. 发明专利

JP2006010705A Control rod drawing monitoring device, and control rod controller 有权
标题翻译：控制杆绘图监控装置和控制杆控制器
公开(公告)号：JP2006010705A
公开(公告)日：2006-01-12
申请号：JP2005229001
申请日：2005-08-08
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： ARITA SETSUO , OKIDO FUMIYASU , HASEGAWA MAKOTO , SASAGAWA MASARU , NOZAKI TAKESHI , ISHII KAZUHIKO , MARUYAMA HIROMI , ISHII YOSHIHIKO
IPC分类号： G21C17/10 , G01T3/00 , G21C7/08
CPC分类号： Y02E30/31 , Y02E30/39
摘要： PROBLEM TO BE SOLVED: To draw a control rod without reducing reactor power when the amount of neutron fluctuation increases, and to prevent drawing of the control rod in local power increase in the reactor core. SOLUTION: This monitoring device and this controller comprise a digital filter 6 that is connected with an amplifier and has a finite length impulse response (FIR). They also comprise an adjusting means 4 that inputs signals from an average power monitor 10 and an LPRM power average processor 3, sets the gain of an amplifier 5 to one when the reactor core average neutron flux is lower than the local average neutron flux, adjusts the gain of the amplifier 5 so that the reactor core average neutron flux becomes equal to the local average neutron flux when the reactor core average neutron flux is the local average neutron flux or higher, and sets the reactor core average neutron flux in each delay element Z -1 of the digital filter 6 as an initial value. They also comprise a comparing means 7 for outputting a control rod drawing prevention signal when the power from the digital filter 6 exceeds the set level. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：当中子波动量增加时，不需要减小反应堆功率就可以绘制控制棒，并且防止控制棒在反应堆堆芯的局部功率增加中拉动。解决方案：该监视装置和该控制器包括与放大器连接并具有有限长度脉冲响应（FIR）的数字滤波器6。它们还包括调整装置4，其输入来自平均功率监视器10和LPRM功率平均值处理器3的信号，当反应堆堆核平均中子通量低于局部平均中子通量时，将放大器5的增益设置为1，调整放大器5的增益使得当反应堆堆芯平均中子通量为局部平均中子通量或更高时，反应堆堆芯的平均中子通量变得等于局部平均中子通量，并且将每个延迟元件中的堆芯平均中子通量设定 Z -1 作为初始值。它们还包括比较装置7，用于当来自数字滤波器6的功率超过设定电平时，输出控制棒拉拔防止信号。版权所有（C）2006，JPO＆NCIPI

3. 发明专利

JP2004257863A Display apparatus for position of control rod 有权
公开(公告)号：JP2004257863A
公开(公告)日：2004-09-16
申请号：JP2003048880
申请日：2003-02-26
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： NOZAKI TAKESHI , GOTO YOSHIMI
IPC分类号： G21C7/16 , G21C17/10
CPC分类号： Y02E30/39
摘要： PROBLEM TO BE SOLVED: To enable the display of the correct position of a control rod when an abnormality has occurred in a control rod position display system as to the display of the position of the control rod of a reactor.
SOLUTION: A display apparatus for the position of the control rod has a control rod drive circuit 8a for manipulating the control rod 2 of the reactor 1, a unit 4 for controlling the hydraulic pressure of the control rod 2, a probe 3 for detecting the position of the control rod 2 and a control rod position detecting circuit 7a and transmits a detection signal of the position of the control rod 2 as an indication signal of the position of the control rod 2 (a position detection probe) to a control rod manipulation/monitoring panel 9a to display the position of the control rod 2. Moreover, a circuit 8b for detecting the position of the control rod 2 through the drive of it which calculates the position of it on the basis of a manipulated variable 5 for driving it and a circuit 10 for switching a control rod position signal are provided to display the position of the control rod 2 by switching to a control rod position (calculation) display signal 13 calculated by the circuit 8b for detecting the position of the control rod 2 through the drive of it by way of a signal switching means 10 in the event of any failure in displaying the position in the control rod position detecting circuit 7a.
COPYRIGHT: (C)2004,JPO&NCIPI

4. 发明专利

JP2001099978A FIXED TYPE INSTRUMENTATION SYSTEM IN NUCLEAR REACTOR 失效
公开(公告)号：JP2001099978A
公开(公告)日：2001-04-13
申请号：JP27438499
申请日：1999-09-28
申请人： HITACHI LTD
发明人： ARITA SETSUO , HASEGAWA MAKOTO , ISHII KAZUHIKO , NOZAKI TAKESHI , TOKAWA YUICHI
IPC分类号： G21C17/10
摘要： PROBLEM TO BE SOLVED: To provide a fixed type instrumentation system in nuclear reactor using a gamma ray detector causing no extension of plant starting time. SOLUTION: The number of heater controllers 13 heating a plurality of fixed type gamma ray detectors 4a to 4k and sequentially heating heaters 44 one by one is determined as a number so that all calibrations of the gamma ray detectors are finished while reactor power is constant at starting of a nuclear reactor.

5. 发明专利

JP2001021678A REACTOR OUTPUT MEASURING DEVICE 失效
公开(公告)号：JP2001021678A
公开(公告)日：2001-01-26
申请号：JP19120499
申请日：1999-07-06
申请人： HITACHI LTD
发明人： ARITA SETSUO , HASEGAWA MAKOTO , ISHII KAZUHIKO , NOZAKI TAKESHI
IPC分类号： G01N25/20 , G21C17/10 , G21C17/108
摘要： PROBLEM TO BE SOLVED: To provide a reactor output measuring device capable of low in cost and high in reliability. SOLUTION: Gamma ray detectors 4a to 4k for measuring heat generation quantity of metal due to γ-ray generated in a reactor, a computer calculating reactor power based on the output signal from the γ-ray detectors 4a to 4k, a heater for heating the γ-ray detectors 4a to 4k, a power source 133 for supplying power to the heater for heating, and a calibration means 123 for calibrating the sensitivity of the γ-ray detectors 4a to 4k, during the heating by the heater are provided and the power source 133 is arranged in a central control room.

6. 发明专利

JP2001099980A NUCLEAR REACTOR POWER MEASURING DEVICE 失效
公开(公告)号：JP2001099980A
公开(公告)日：2001-04-13
申请号：JP27815799
申请日：1999-09-30
申请人： HITACHI LTD
发明人： HASEGAWA MAKOTO , ARITA SETSUO , ISHII KAZUHIKO , NOZAKI TAKESHI
IPC分类号： G21C17/10
摘要： PROBLEM TO BE SOLVED: To provide a nuclear reactor power measuring device capable of reducing the number of sensitiveness calibrations of a GT sensor while suppressing an error of sensitiveness of the GT sensor within a tolerance range. SOLUTION: This device is provided with gamma ray thermometers 31a to 31i outputting signals corresponding to the temperature change of metal due to gamma rays generated inside a nuclear reactor 2, means 5 and 13a for determining reactor power on the basis of the signals outputted by the gamma ray thermometers 31a to 31i and a sensitiveness of the gamma ray thermometers 31a to 31i, a calibrating means 9 calibrating the sensitiveness of the gamma ray thermometers 31a to 31i, and a means 20 for predicting a future value of the sensitiveness of the gamma ray thermometers 31a to 31i.

7. 发明专利

JP2001027684A CONTROL SYSTEM FOR CONTROL ROD 失效
公开(公告)号：JP2001027684A
公开(公告)日：2001-01-30
申请号：JP19978199
申请日：1999-07-14
申请人： HITACHI LTD
发明人： NOZAKI TAKESHI , TOKAWA YUICHI , NAGATA YOSHIFUMI , HAIKAWA KATSUMASA
IPC分类号： G21C7/08 , G21C17/10
摘要： PROBLEM TO BE SOLVED: To provide a control rod control system which can restrict an unnecessary rod withdrawal block signal generated due to a control rod position deviation possibly brought about from a normal characteristic of an induction motor, and can detect an irregularity of the induction motor itself by monitoring the control rod position deviation. SOLUTION: The control rod control system compares a gang deviation large set value 108 which is a slightly larger value than a control rod positioned deviation possibly brought about from a normal characteristic of an induction motor empirically obtained beforehand in accordance with a control rod maximum drive distance, and a gang deviation 106 with each other by a comparator 114, and outputs a control rod withdrawal block signal 107 when the gang deviation 106 is larger than the gang deviation large set value 108.

8. 发明专利

JP2000258543A SELF-CALIBRATION DEVICE OF REACTOR OUTPUT-MEASURING DEVICE 失效
公开(公告)号：JP2000258543A
公开(公告)日：2000-09-22
申请号：JP6269799
申请日：1999-03-10
申请人： HITACHI LTD
发明人： ISHII KAZUHIKO , ARITA SETSUO , HASEGAWA MAKOTO , TOKAWA YUICHI , NOZAKI TAKESHI , MARUYAMA HIROMI , MATSUMIYA SHOICHI
IPC分类号： G01T3/00
摘要： PROBLEM TO BE SOLVED: To enable an operator to verify the soundness of a heater circuit by displaying a measurement result on an operation/display device, comparing it with a preset tolerance, and judging whether a calibration processing as a next step can be continued or not. SOLUTION: A data-processing device 43 obtains a γ-ray energy calorific value from the output signal of a thermocouple by arithmetic processing to measure the output of a reactor. An operation/display device 5 displays an operation processing result in numbers, bar graphs, graphics, or the like. A transmission device 44 transmits the operation processing result to a client device as a dispersion-type process computer, for example, for calculating reactor core performance, for example, by a transmission line, the Ethernet. A heater 32 is a heat source that is packaged on a γ-ray thermometer assembly 3 to self-calibrate the measurement of the output of the reactor. A calibration device 5 supplies a power supply for the heater by control from a data- processing device 43. A check terminal 53 connects a standard meter for the heater circuit of the calibration device 5.

9. 发明专利

JP2000056027A STATE QUANTITY MEASURING SYSTEM 失效
公开(公告)号：JP2000056027A
公开(公告)日：2000-02-25
申请号：JP22960198
申请日：1998-08-14
申请人： HITACHI LTD
发明人： NOZAKI TAKESHI , TOKAWA YUICHI , SHIROICHI HISATOKU , ARITA SETSUO , TAWATA YASUKIYO , YOSHINARI HIROSHI , ISHII KAZUHIKO
IPC分类号： G21C17/00 , G01T1/17 , G21C17/10 , H02G3/22 , H05K9/00
摘要： PROBLEM TO BE SOLVED: To make sound signal measurement by suppressing external noises caused by electrostatic induction and electromagnetic induction in a state quantity measuring system having the flexible conduit tube of a nuclear power plant used for the cable penetration having the possibility of the occurrence of object displacement or at an interface position to a reactor building. SOLUTION: This state quantity measuring system is provided with a detector detecting the state quantity of a reactor, a cable transmitting the state quantity, and a conduit tube storing the cable and constituted of a flexible conduit tube section 51 and a thick steel conduit tube section connected to it. The peripheral surface of the flexible conduit tube section 51 is covered with an electromagnetic shielding body not impairing its flexibility.

10. 发明专利

JP2005326301A Reactor power measuring apparatus 审中-公开
标题翻译：反应堆功率测量装置
公开(公告)号：JP2005326301A
公开(公告)日：2005-11-24
申请号：JP2004145283
申请日：2004-05-14
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： NOZAKI TAKESHI , FUSHIMI ATSUSHI , KIMURA HIROYUKI
IPC分类号： G21C17/10 , G21C17/108
摘要： PROBLEM TO BE SOLVED: To provide a reactor power measuring apparatus which suppresses an increase in wiring number and simultaneously simplifies the constitution.
SOLUTION: The apparatus comprises a case 3 placed in the core 13 of the reactor as extension along the axis of the reactor, an ion chamber 1 for detecting γ rays arranged by dispersing in the position different from the extension direction of the case 3 in the case 3, and a calculation means 9 for calculating the power of the reactor from the variation of electric quantity caused by the ionization of the γ rays in the ion chamber 1 for γ-ray detection. The calculation means 9 is so constituted as to transmit signal commanding protection operation of the reactor according to the information of the calculated reactor power. In this manner, TIP detector and a plurality of temperature detectors substituting the TIP detectors become unnecessary, and the increase of the number of wiring is suppressed and simultaneously constitution of reactor power measuring arrangement can be simplified.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：解决的问题：提供抑制配线数量增加并且同时简化结构的电抗器功率测量装置。解决方案：该装置包括：放置在反应器的芯部13中的壳体3，沿着反应器的轴线延伸;离子室1，用于检测通过分散在不同于壳体的延伸方向的位置而布置的γ射线 3的情况，以及计算装置9，用于根据用于γ射线检测的离子室1中的γ射线的电离引起的电量变化来计算电抗器的功率。计算装置9构成为根据计算出的反应堆功率的信息发送指示反应堆的保护动作的信号。以这种方式，不需要TIP检测器和代替TIP检测器的多个温度检测器，并且抑制布线数量的增加，并且可以同时简化电抗器功率测量装置的构造。版权所有（C）2006，JPO＆NCIPI

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