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    • 5. 发明专利
    • OUTPUT DISTRIBUTION ADJUSTING DEVICE FOR NUCLEAR REACTOR
    • JPH01195394A
    • 1989-08-07
    • JP1699788
    • 1988-01-29
    • HITACHI LTDHITACHI ENG CO LTD
    • TOGASHI TAKESHIUCHIYAMA HITOSHI
    • G21C7/00G21C17/00G21D3/00
    • PURPOSE:To uniformly burn fuel to efficiently consume a fissionable material in fuel by operating the deviation between a target output and a detection output at each control rod position point in accordance with the target output distribution in the radial direction of a nuclear reactor and the signal of a neutron flux detector. CONSTITUTION:A computing element 6 selects a control rod, whose deviation between the target output and the detection output at each control rod position point in the nuclear reactor is maximum, as the output distribution adjusting control rod in accordance with a target output distribution 8 in the radial direction of the nuclear reactor, a detected neutron flux signal 11, and a detection control rod position signal 12 and outputs a detection output 15 and a target output 16 at the output distribution adjusting selected control rod point. Only when the deviation between these outputs exceeds a prescribed value, a signal is inputted to a control rod controller 20 by a signal limiter 19. A polarity discriminator 21 outputs a signal, which inserts or pulls out the output distribution adjusting selected control rod, to a control rod drive mechanism 3 in accordance with the deviation. Thus, a ratio of a maximum to a minimum of the output in the radial direction of the nuclear reactor is reduced to efficiently consume fuel.
    • 9. 发明专利
    • TRANSFERRING SYSTEM OF SEPARATING DEVICE
    • JPH10225651A
    • 1998-08-25
    • JP3170497
    • 1997-02-17
    • HITACHI LTDHITACHI ENG CO LTD
    • TAKEMARU KOICHIUCHIYAMA HITOSHISUZUKI TOSHIYUKI
    • B04B11/00B04B13/00
    • PROBLEM TO BE SOLVED: To provide an operation controlling system of a transferring system of a separating device in which a volume of a separating tank is reduced in a system in which a soln. from a receiving tank is supplied to a centrifugal separator and transferred to plural separating tanks by executing separating treatment according to its concn. or composition. SOLUTION: In a device providing the receiving tank 1 receiving the soln. from a preceding stage, a soln. measuring instrument 7 in the receiving tank 1, a transmitter 8, a steam jet 2D transferring the soln. from the receiving tank 1 to the centrifugal separator 3 and plural separating tanks 4A-4C receiving a separated soln. separated with the centrifugal separator 3 and a mutual additional tank 6 receiving the separated soln. more than the volume of the separating tank through the steam jets 2A-2C, a generation ratio of the separated soln. is calculated with the soln. measuring instrument 7 and a maximum generation amount of the separated soln. is calculated, and an instrument controlling signal is outputted for selecting an operation of the steam jet and a transferring instrument.
    • 10. 发明专利
    • TEMPERATURE CONTROL DEVICE FOR HEATING EQUIPMENT
    • JPH04305715A
    • 1992-10-28
    • JP7079091
    • 1991-04-03
    • HITACHI LTDHITACHI ENG CO LTD
    • ISHIKAWA MASAJIISHII KUNIOUCHIYAMA HITOSHI
    • G05D23/19G05D23/24
    • PURPOSE:To uniformize the temperatures of respective parts in respective processes of temperature rise, temperature fixing and temperature drop by suppressing the generation of a temperature difference in respective adjacent parts. CONSTITUTION:A part corresponding to a heater 81 having the largest heating constant out of respective heaters 81 to 84 is set up as a reference part, the temperature of the reference part is detected by a temperature detector 11, a signal from a temperature setter 20 and a signal from the detector 11 are added/subtracted by an adder/substractor 31, a temperature controller 6 executes the control operation of the added/subtracted result, and a power controller 71 controls electric energy to be applied to the heater 81. In the heater 82 to be a part adjacent to the reference part, the temeprature of the part 82 and a set temperature difference are mutually added/subtracted, a temperature difference between the temperature of the reference part and that of the self-part 82 is added/subtracted to/from the added/subtracted value by an adder/subtractor 41, respective added/subtracted values are combined and mutually added/subtracted, the control operation of the obtained added/subtracted value is executed by a temperature controller 62, and electric energy to be applied to the heater 82 is controlled by a power controller 72. In the heaters 83, 84 to be the succeeding adjacent parts, a temperature difference between the temperature of the adjacent part and that of the self-part is found out by addition/subtraction and electric energy to be applied to the heaters 83, 84 are similarly controlled.