| 摘要 |
PURPOSE:To detect the water leakage exactly, by compensating a hydrogen concentration signal by a temp. signal of cold trap refining which is delayed by the time in inverse proportion to the flow rate of a liquid metal. CONSTITUTION:A part from a main cyclic system 1 is transported to a cold trap 11 by a pump 10 and is subjected to a refining treatment and is returned to the system 11. Sodium is transported to a hydrogen detector 4 by a pump 2 and the pressure of hydrogen dispersed in a vacuum chamber 5 through a hydrogen dispersing film 3 is detected by a vacuum indicator 8. A temp. signal of cold trap refining detected by a thermometer is converted to a signal of back ground hydrogen concentration by an operator of hydrogen concentration 13. A signal of flow rate from a flow rate meter 12 is converted to a delay time signal in accordance with the delayed time by a delay time operator 14, and afterward it is inputted to an indicating meter 9 together with the signal of back ground hydrogen concentration and a signal from the vacuum indicator 8. The signal of back ground hydrogen concentration is delayed in accordance with the delay time signal in the indicating meter 9 and a signal from the vacuum indicator 8 is compensated by this way. |
