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11. 发明专利

JPH095490A REACTOR PROTECTIVE DEVICE 失效
公开(公告)号：JPH095490A
公开(公告)日：1997-01-10
申请号：JP19035496
申请日：1996-07-19
申请人： HITACHI LTD
发明人： ARITA SETSUO , UTENA SHUNSUKE , ITO TETSUO
IPC分类号： G08C15/00 , G01D21/00 , G21C17/00 , G21D3/04
摘要： PROBLEM TO BE SOLVED: To reduce the number of signal transmission cables by multiplexing the detection signals of multiple sensors detecting the state quantity of a reactor, and individually transmitting scram signals outputted when signals become a reference value or above to make the reactor scram. SOLUTION: A transmitting circuit 1A multiplexes the outputs of analog sensors SA1a -SAka and digital sensors SA1d -SAjd at a plant site and transmits them to the receiving circuit 3A of a central control room via a multiplex transmission cable 2A. A trip circuit 9A receives the signals of the sensors SA1a -SAka and transmits the emergency stop signal of a reactor to a logical circuit 10A when the signals are of a reference value or above. When the signals of the sensors SA1d -SAjd contain a signal requiring to scram the reactor, the logical circuit 10A generates the trip signal to operate driving circuits and transmits it to the driving circuits of signal processing systems via individual transmission. The number of transmission cables required for the signal transmission between the plant site and the central control room can be reduced to the irreducible minimum.

12. 发明专利

JPH06217302A REMOTE TECHNOLOGY ASSISTANCE SYSTEM 失效
公开(公告)号：JPH06217302A
公开(公告)日：1994-08-05
申请号：JP470993
申请日：1993-01-14
申请人： HITACHI LTD
发明人： ISHII KAZUHIKO , TAKAHARA KAZUKO , FUJIHIRA KAZUSHIGE , UTENA SHUNSUKE , ARITA SETSUO , YOKOTA TAKESHI , HAYASHI TATSUO , YAMAZAWA YUJI , SATO HIDEYUKI , HASHIMOTO SHIGEO
IPC分类号： H04M3/56 , G06Q50/00 , G06Q50/04 , H04N7/15
摘要： PURPOSE:To assist technology for the operation and maintenance of a plant system remotely and surely by executing a video conference at multi-points including a plant and using state information of the plant in common for information used for the video conference. CONSTITUTION:Motion picture information obtained from cameras 31,71 is inputted to a multiplexer demultiplexer section 102 via a video control section 106 and a picture transmission section 103. Furthermore, voice information from microphones 41, 72 is inputted to the demultiplexer section 102 via an echo canceller section 107 and a voice transmission section 104. Furthermore, the information possessed by a plant information input controller 81 is also inputted to the demultiplexer section 102. The demultiplexer section 102 forms motion picture information, voice information, still picture information and data from a transmission section 103, a transmission section 104 and a data transmission section 105 into a frame format corresponding to a protocol of a communication line 10 and sends the format to a line 10 via the line interface section 101. On the other hand, a frame received from the line 10 is demultiplexed into respective information in the reverse procedure and outputted finally to a television receiver 21 and a speaker 51.

13. 发明专利

JPH0434120B2 失效
公开(公告)号：JPH0434120B2
公开(公告)日：1992-06-04
申请号：JP14341082
申请日：1982-08-20
申请人： HITACHI LTD
发明人： OOGA KOJI , UTENA SHUNSUKE , WATANABE TAKAO
IPC分类号： G21C7/00 , G21C17/00 , G21D3/00 , G21D3/04

14. 发明专利

JPH04120422A PLANT MONITORING APPARATUS 失效
公开(公告)号：JPH04120422A
公开(公告)日：1992-04-21
申请号：JP24001090
申请日：1990-09-12
申请人： HITACHI LTD
发明人： UTENA SHUNSUKE , YUMITATE TADAHIRO
IPC分类号： G01D21/00 , G05B23/02
摘要： PURPOSE:To automate regular tests of a safety system by determining whether or not a control signal for inspection from an inspection control signal generator is normal and providing a signal determining means for inhibiting transfer of the control signal for inspection to respective safety devices when the signal is not normal. CONSTITUTION:A safety system controller 2 determines control logic by an operation instruction 8 of an operation monitor board 1 and outputs a control signal 9, which is sent to respective safety system devices 4 via a transmitter 3. The devices 4 operate by the signal 9, and its status signal 10 is sent to the controller 2 via the transmitter 3. In the controller 2, control logic is determined by the signal 10, and the status of the devices 4 is displayed on the monitor board 1. Then when a regular test is selected by a regular test selection switch 7, a regular test controller 5 is actuated by a selection signal 12, wherein a signal selection circuit 6 is set in a direction of connection, a test instruction signal 11 generated in the controller 5 is sent to the devices 4 via the controller 2, and the signal 10 from the respective devices 4 is input to the controller 5. With the connection and disconnection of the circuit 6, the signal 11 which is not necessary at the time of normal operation will not be input to the controller 2.

15. 发明专利

JPH10132984A IN-PLACE DETECTOR STATIONARY TYPE REACTOR OUTPUT MEASUREMENT DEVICE 失效
公开(公告)号：JPH10132984A
公开(公告)日：1998-05-22
申请号：JP28866496
申请日：1996-10-30
申请人： HITACHI LTD
发明人： ISHII KAZUHIKO , HIRAYAMA TOSHIYUKI , ARITA SETSUO , HASEGAWA MAKOTO , UTENA SHUNSUKE , FUKAZAWA YUKIHISA , MIYAKE MASAO , YAMAZAWA YUJI
IPC分类号： G21C17/10 , G21C17/12
摘要： PROBLEM TO BE SOLVED: To materialize the accurate calibration of the reactor output measurement by a local output detector by packaging more than ten γ ray temperature gages in a high density in the longer direction of a detector assembly for the reactor output measurement device. SOLUTION: A plurality of local output detectors 21A, 21B, 21C and 21D are disposed in the inside of a local output detector assembly 2 at the center part in the radial direction in cross section of a detector assembly 1 to be disposed in the inside of an atomic reactor, meanwhile, a plurality of γ ray temperature gages 301 through 3n (n is a natural number greater than 10) are disposed in the annular shaped space at its outer circumferential part. Thus as mentioned above, the inner diameter of the detector assembly 1 is effectively utilized, a great number (more than 10 each) of the γ ray gages are packaged in a high density. By this constitution, the distribution of each measured value by the γray temperature gages in place in the vertical direction can be made thick, and it is thereby materialized that the atomic reactor output measurement by the local output detectors can thereby be accurately calibrated.

16. 发明专利

JPH0778552B2 失效
公开(公告)号：JPH0778552B2
公开(公告)日：1995-08-23
申请号：JP19272188
申请日：1988-08-03
申请人： HITACHI LTD
发明人： ARITA SETSUO , UTENA SHUNSUKE , ITO TETSUO
IPC分类号： G21C7/08 , G21C17/00 , G21D3/04

17. 发明专利

JPH0787579A REMOTE MONITORING SYSTEM OF CENTRAL CONTROL ROOM 失效
公开(公告)号：JPH0787579A
公开(公告)日：1995-03-31
申请号：JP18709493
申请日：1993-06-30
申请人： HITACHI LTD
发明人： ARITA SETSUO , YOKOTA TAKESHI , ISHII KAZUHIKO , UTENA SHUNSUKE
IPC分类号： G05B15/02 , G05B23/02 , H04Q9/00
摘要： PURPOSE:To obtain a remote monitoring system of a central control room which transmits and displays plant operation information and plant state information from the central control room to an operation source and instructs information for operation in such as maintenance, checking, inspection, etc. CONSTITUTION:Plant state information and plant operation information displayed on an operation monitoring board 1 or display means 2, 5 and 6 in the central control room is picked-up by TV cameras 81 to 8N. Then, the piece of picked-up information is transmitted to the operation source which operates maintenance, checking, inspection, etc., and a monitor 10 monitors the piece of information to recognize the state and the operation situation of the plant at the operation source. On the other hand, picked-up plant operation information and plant state information of the central control room are transmitted in accordance with a requiring signal from the operation source and the operation source monitors the pieces of information so as to unnecessitate inquiry to the operator 3 of the central control room. Furthermore, the TV cameras 81 to 8N operate the functions of wide angle zooming and oscillating in accordance with the requiring signal so as to recognize partial information desired to obtain at the operation source.

18. 发明专利

JPH0749399A SAFETY PROTECTIVE SYSTEM FOR NUCLEAR REACTOR 失效
公开(公告)号：JPH0749399A
公开(公告)日：1995-02-21
申请号：JP678194
申请日：1994-01-26
申请人： HITACHI LTD
发明人： ARITA SETSUO , UTENA SHUNSUKE , MURATA FUMIO , NOGUCHI ATOMI , IZUMI SHIGERU , SUZUKI SATORU , OKIDO FUMIYASU
IPC分类号： G01D21/00 , G05B9/03 , G05B23/02 , G21C17/00 , G21D3/04
摘要： PURPOSE:To enhance the reliability in the protective operation being conducted when two operating means are operated by performing the 2-out-of-4 logic for the quadrupled status amount signals from sensors in a quadrupled signal processing system thereby producing a trip signal. CONSTITUTION:A signal processor 1A is provided with digital trip modules DTM-A1-A4,..., DTM-N1-N4 connected, respectively, with sensors A1-A4,..., N1-N4. The DTM-A1-A4,..., DTM-N1-N4 are connected, respectively, with 2-out-of-4 logic circuits 29A,..., 29N. The 2-out-of-4 logic circuits 29A,..., 29N are connected with a 1-out-of-n logic circuit 30. Other signal processors 2A, 3A, 4A have similar constitutions. Upon delivery of a trip signal from at least one of (n) 2-out-of-4 logic circuits 29A,..., 29N, the 1-out-of-n logic circuit 30 delivers a trip signal (a) for opening a scramming solenoid valve thus scramming the nuclear reactor.

19. 发明专利

JPH04334294A MAINTENANCE DEVICE FOR DISTRIBUTED TYPE PROCESS CONTROL DEVICE 失效
公开(公告)号：JPH04334294A
公开(公告)日：1992-11-20
申请号：JP10551691
申请日：1991-05-10
申请人： HITACHI LTD
发明人： NAGATA HIROSHI , UTENA SHUNSUKE
IPC分类号： G05B15/02 , G05B23/02 , H04Q9/00
摘要： PURPOSE:To improve the test efficiency of the function confirmation, etc., of the process control device and to miniaturize the control panel by enabling the intensive display and simulation of the state of input/output parts of plural process control devices from the maintenance device without providing the exclusive signal simulation circuit. CONSTITUTION:A maintenance device 300 is composed of a transmission line 100 with which process control devices 201-20n are connected, a transmission device 310 connected with the transmission line, a maintenance device main body 320, a CRT display device 330 and an input device 340. The maintenance device main body 320 is composed of a communication processing part 321 performing the communication processing with the transmission device 310 and a display/input processing part 322 performing the display processing to the CRT display device 330 and the input processing from the input device 340.

20. 发明专利

JPS63140305A CONTROL PROTECTING DEVICE 失效
公开(公告)号：JPS63140305A
公开(公告)日：1988-06-11
申请号：JP483487
申请日：1987-01-14
申请人： HITACHI LTD
发明人： ARITA SETSUO , UTENA SHUNSUKE , MURATA FUMIO , NOGUCHI ATOMI , IZUMI SHIGERU , SUZUKI SATORU , OKIDO FUMIYASU
IPC分类号： G05B9/03 , G06F11/18 , G21D3/04
摘要： PURPOSE:To simplify the structure of an opening/closing device and to improve reliability, by constituting a control protecting device to secure the safety of a nuclear reactor with a quadrupled sensor, first - fourth signal processing systems for trip arranged in parallel, and independent two operating means. CONSTITUTION:The opening/closing device is constituted in such a way that independent two operating means are operated with trip signals outputted from at least two processing systems out of four signal processing systems, and constitutes a two-out-of-four logic circuit with two operating means. In other words, four series of signal processing systems 25A consisting of a signal processing circuit 1, a switching circuit 19A, and an abnormality diagnosing device 22A are provided, and are connected to a power circuit 5 that is the opening/closing device. In the circuit 5, relays 8-15 and excitation coils 16 and 17 are provided, and they constitutes the two-out-of-four logic circuit. By constituting a device in such a way, and when an abnormal state is generated in a plant, a scram electric magnet 18 is operated, then a solenoid valve 19 is opened, and a control rod is inserted quickly to a reactor core, thereby, the reactor is scrammed.

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