Show all work. State the criteria for a high radiation area and any assumptions used in the calculation. Show all work. The following questions relate to a university radiochemistry facility. These nuclides are transported via a carrier gas through plastic tubing into a laboratory hood.
Radiochemical processing occurs in a shielded reaction vessel in the hood.
An accident occurred when a ceiling tile dislodged and knocked loose the gas line, allowing 15 O to be released at a constant rate into the laboratory room air. Assume instant and complete mixing of 15 O with room air. Show all work. 20 C. Flow was terminated after 6 minutes and the technician left the room. Give two reasons why exceeding this DAC does not necessarily mean that an overexposure to 15 O has occurred.