| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an exhaust gas radiation monitor for certainly detecting radioactive gas concentration in exhaust gas, minimizing leak potential of exhaust gas in a collecting line of exhaust gas sample, and inhibiting radioactivity leakage to exterior. <P>SOLUTION: A pressure-regulating valve and a pressure detector are installed before an exhaust gas radioactivity measurement container and an exhaust gas sample flow control valve, pressure in a picking piping is measured by the pressure detector, the pressure signal measured is transmitted to an arithmetic device, suitable divergence signal is sent from the operating device to the pressure-regulating valve so as to accord the atmospheric pressure established at will in the arithmetic device with the pressure in the picking piping, and by controlling divergence of the pressure-regulating valve, parts with high leak potential in the collecting line of exhaust gas sample are forced to negative pressure to inhibit radioactivity leakage to exterior. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
