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    • 8. 发明专利
    • APPARATUS FOR MEASUREMENT OF NUCLEAR REACTOR CORE FLOW
    • JPS6469993A
    • 1989-03-15
    • JP22637387
    • 1987-09-11
    • HITACHI LTD
    • FUJIHIRA KAZUSHIGE
    • G21C17/032G21C17/02
    • PURPOSE:To obtain a highly accurate core flow rate, by constituting a measuring device with a differential pressure detection, a correlation calculator of a differential pressure and a flow rate and an adjustment device against an output dependency. CONSTITUTION:A differential pressure detector 9 measures a differential pres sure between both pressures at an inlet of a reactor core 1 and at an outlet of the core. And a differential pressure-flow rate calculation device 9 stores differential-flow rate corelation equations either for a case of a constant reactor output or for a case of a reactor output Pw changing with a core flow rate W keeping a certain relationship, and puts out a primarily adjusted core flow signal W1 calculated from a detected differential pressure DELTAP. An adjusting device of an output dependency 11 is provided for excluding flow rate measuring error DELTA W2 and performs correction using a predetermined calculational equa tion, against an output signal W1 taken from the calculation device 9. As its results, the output signal W2 of a compensation device for an output dependency 10 is adjusted to the extent of a measuring error of the flow rate meter DELTA2. By this procedure, a reactor core flow measurement with high accuracy can be attained and malfunctions in an ordinary operation region can be avoided.