| 摘要 |
PURPOSE:To effectively absorb sodium aerosol passing through a sampling nozzle suction port, and to detect leakage of sodium in a short time, by installing a partition plate provided with a gas passing notch at a sampling nozzle position only, on the inside of a heat retaining material of the sampling nozzle position and the outside of a sodium pipe. CONSTITUTION:An annulus part 4 for making gas flow is formed between a sodium pipe 1 and a heat retaining material 2, by providing the heat retaining material on the sodium pipe 1. A sampling nozzle 3 is provided on the horizontal part and the vertical part of the sodium pipe 1 through the heat retaining material, in the annulus part 4. Also, a partition plate 5 provided with a gas passing notch at an absorbing position only is installed to a position of the sampling nozzle 3. In case when damage occurs in an optional position in the vertical part of the sodium pipe 1 and leakage of sodium occurs, generated sodium aerosol is gasified and rises along the annulus part 4, but its rise is obstructed by the partition plate 5, it flows in the direction of the notch part of the partition plate 5 along the lower face of the partition plate 5, and when it rises along the notch part, it is absorbed and sampled into the sampling nozzle 3 set at the same position, and the leakage of sodium can be detected in a short time. |
