| 摘要 |
<p>Treating and venting gaseous nuclides in the gas space above the liquid level in tanks containing radioactive liquid is accomplished by connecting the gas spaces in series with the gas space at one end having the highest radioactivity, normally discharging at a limited rate into a waste gas system, and air to replace the discharged gas, introduced into the gas space at the other end. Sudden surges or fluctuations in gas pressure in the gas spaces due to rapid filling of the tank with liquid is relieved by discharging gas from the gas space of low activity at the other end into a stack. Voids in the tanks created by rapid emptying of the tanks is filled by air entering the gas space of low activity at the other end. A self cleaning filter which removes nuclides from the gas before entering the stack is reactivated by the passage of air in a reverse direction through the filter with the return of the nuclides to the gas space of low activity. The system permits longer holding time of nuclides, greater assurance of unwanted nuclides not entering the stack, and means for compensating for surges in the gas space without disturbing the operation of the waste gas system.</p> |
