• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Contactless transmission of information about temperatures within a fuel assembly of a nuclear reactor by means of a thermoelement situated in the fuel assembly, the thermoelement generating a magnetic field the intensity of which is proportional to the temperature within the fuel assembly. A harmonic magnetic sensing element disposed outside the fuel assembly for registering the value of intensity of this magnetic field is employed, the sensing element being connected to an arrangement for the evaluation of such. The fuel assembly is provided with a sheath or housing which permits the passage of the magnetic field therethrough.
    公开号:SU940245A1
    申请号:SU797770631
    申请日:1979-06-06
    公开日:1982-06-30
    发明作者:Ладислав Фица；Милош Черны
    申请人:Шкода Народное Предприятие "Пльзень" (Инопредприятие)；
    IPC主号:
    专利说明:

    The 3 rd system can no longer prevent the destruction of the cassette where the accident occurred. For these reasons, it is technically more advantageous to measure the temperature at the outlet of each fuel cartridge. The wider implementation of this method is hampered by the fact that the temperature measurement system should not interfere with either loading or changing fuel. Until now, the existing solution to the method of contactless transfer of temperature data from the fuel cassette of a reactor uses an electromechanical transducer mounted in a cassette that converts the direct current of the thermocouple to a pulsating current. This current feeds the transformer winding in the cassette with which the thermocouple voltage is transformed to the receive winding of the front of the fuel cassette. This solution is the closest in its technical essence to the proposed I. The disadvantage of this solution is the low reliability of the moving mechanical parts of the electromechanical converter at high temperatures, unstable function. When the ambient temperature changes, the contact resistance due to condensation of components released from high temperatures insulation materials, and changes in the parameters of the springs used, depending on the temperature. These effects, including the effects of intense radiation on aging and the mechanical properties of materials, make a solution with an electromechanical transducer incapable of use in nuclear power engineering. The essence of the connection circuit for the contactless transmission of temperature data from the fuel cassette of a nuclear reactor is that a thermocouple installed inside the fuel cassette is connected magnetically to a coil winding connected to a harmonic magnetic finder (probe) to which the upper harmonic filter circuit is connected. , connected to a recording device, and a source of alternating current. The advantage of this solution is the detection of a local accident already in the process of its occurrence. S that allows an emergency reactor system to halt its expansion. This can avoid a long-term exit from the power plant. Another advantage is the constant determination of the temperature of the coolant at the outlet of each fuel cartridge, which makes it possible to optimize the reactor power and, as a result, achieve a general increase in electricity production by several percent. Other advantages of this solution include the continuous transmission of temperature data over time, the rapid response to changes in the measured temperature dependent on a temporary permanent thermocouple, the reproducibility of measurements and mainly the elimination of moving mechanical parts, which significantly increases reliability. FIG. 1 shows a measuring device with a part of the fuel cartridge; in fig. 2 - wiring diagram. Thermocouple 1 is installed inside the fuel cassette 2 and connected to the winding of coil 3. and outside the fuel cassette 2 is a harmonic magnetic finder (probe) k connected to an alternating current source 5 and a high harmonic filter circuit 6 to which the evaluator is connected (registration device) 7Schema connections works as follows. Thermocouple 1 energizes coil 3, resulting in a magnetic field around coil 3. The intensity of the magnetic field depends on the temperature difference between the measuring and comparative ends of thermocouple 1, installed in the direction of the longitudinal axis of the fuel cartridge 2, and hence on the temperature inside the fuel cartridge 2. The magnetic field lines of the coil 3 penetrate the hermonic magnetic finder k, which is connected with a source of alternating current with time, feeding the excitation winding 8 and the excitation winding 9 of the opposite direction, performed in the opposite direction on the tapes 10 of the mag nitic harsh material. It is necessary for the variable-current source 5 to supply an undistorted sinusoidal curve of such intensity 59 CMBHocTii so that the magnetic field in the tapes 10 is below the magnetic saturation zone of the material of the tapes 10. Since the excitation winding 8 and the excitation winding 9 of the opposite direction are connected in the reciprocal direction, their magnetic fluxes are mutually counted, and only a small voltage is induced in the signal winding 11, wound through the excitation winding 8 and the excitation winding 9 of the opposite direction. If the magnetic field lines of the coil 3 begin to penetrate the ribbons 10, the working point is over the edge-5
    The magnetic line of the ribbons 10 shifts and asymmetry of the magnetization of ribbons Ш occurs for individual half-periods of the sinusoidal current of the alternating current supplied from the source 5, and higher, mostly even hermonic oscillations of the alternating current source 5 are induced in the signal winding 11. With treble treble 6, preferably a filter tuned to the second harmonic frequency, the fundamental first frequency is separated, and the amplitude of the upper harmonic oscillations of the second harmonic frequency is measured or recorded by a recording device 7 - a recording device 7, for example, a measuring instrument or the recording device can be calibrated directly in temperature units, because the amplitude of the upper harmonic frequencies is proportional to the intensity of the magnet total floor in coil 3 and temperature measured by thermocouple 1.
    steel and conclusions made of cables with metal sheath and mineral insulation. When changing the fuel cartridge part of the device remains outside the cartridge in its place.
    权利要求:
    Claims (2)
    [1]
    Invention Formula
    A connection diagram of the contactless transmission of temperature data from the fuel cassette of the nuclear reactor, in contrast to the fact that thermocouple 1, installed inside the fuel cassette 2, is connected to the winding of coil 3 by a magnetic coupling connected to the harmonic magnetic finder C, to which a circuit is connected to one side 6 for filtering high harmonic frequencies, connected to a recording device 7, on the other hand, a source 5 of time-varying current. It is recognized as an invention according to the results of the examination carried out by the Office for the Invention of the Czechoslovak Socialist Republic. i5 The principle and operation of the proposed scheme remains unchanged provided that the harmonic magnetic finder is used as an indicator of zero intensity magnetic field in the compensation measurement, and also if the design is made so that the harmonic magnetic finder k penetrates into the fuel cartridge
    [2]
    2. Taking into account the presence of coolant, for example, sodium, separate functional parts inside and outside the fuel cassette can be placed in vacuum-tight stainless steel covers.
    Fig 1
    eight
    N
    eleven
     U 10
    fig.g
    类似技术:
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    同族专利:
    公开号 | 公开日
    JPS5513898A|1980-01-31|
    JPS6214338U|1987-01-28|
    DE2921577A1|1980-01-03|
    US4319958A|1982-03-16|
    DE2921577C2|1987-01-02|
    FR2428893B3|1980-05-23|
    GB2025621B|1982-10-06|
    JPH0240508Y2|1990-10-29|
    CS203349B1|1981-02-27|
    GB2025621A|1980-01-23|
    FR2428893A3|1980-01-11|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    FR1317876A|1963-05-08|
    US3087886A|1959-02-20|1963-04-30|Thompson Nuclear Energy Co Ltd|Temperature measurement apparatus for a nuclear reactor fuel element|
    FR1248934A|1959-02-20|1960-12-23|A E I John Thomson Nuclear Ene|Telemetry device|
    GB920274A|1959-11-21|1963-03-06|Rolls Royce|Improvements in or relating to nuclear reactors|
    US3260979A|1963-12-11|1966-07-12|Lionel E Leavitt|Through-wall electromagnetic coupling|
    US3574263A|1968-07-11|1971-04-13|Educational Computer Systems I|Examination grading computer|SE435432B|1981-03-30|1984-09-24|Asea Atom Ab|Nuclear reactor plant with gas cushions that delimits between the cooling water and the surrounding pool water|
    GB8412981D0|1984-05-21|1984-06-27|Nat Nuclear Corp Ltd|Sensing methods and devices|
    GB8412982D0|1984-05-21|1984-06-27|Nat Nuclear Corp Ltd|Sensing methods and devices|
    JPS6446694A|1987-08-17|1989-02-21|Power Reactor & Nuclear Fuel|Device for diagnosing abnormality of nuclear reactor|
    US9646723B2|2012-08-16|2017-05-09|The Penn State Research Foundation|Thermoacoustic enhancements for nuclear fuel rods and other high temperature applications|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CS783899A|CS203349B1|1978-06-14|1978-06-14|Connection of circuits of contactless transmission of temperature indication from the fuel cassette of nuclear reactor|
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