| 摘要 |
PURPOSE:To ensure the detection of the minute amount of leakage of liquid metal and to make it possible to estimate the amount of leakage, by sampling and integrating the differential signals from an Na differential pressure type detector, and performing the correcting operation on the data based on the temperature at the Na leakage. CONSTITUTION:A differential pressure signal 10 from an Na differential pressure type detector is inputted in an integrator 17 at an interval (t) by a signal from a timing pulse generator 12. Ten data are integrated and inputted into a shift resistor 18. A subtractor 19 computes a gradient DELTAC based on the (n)th data and the first data of the (n) pieces of data, which are obtained by repeating the above described integration. Then, an operator 20 computes the temperature correcting amount from an Na leakage temperature 21. The gradient DELTAC and the temperature correcting amount are multiplied by a multiplier 22, and the temperature corrected gradient DELTAC' is computed. The gradient DELTAC' is compared with a preset value by a comparator 23, and the leakage is judged. |
