1.  Ventilation requirements for the laboratories utilizing radioactive materials are dependent upon the types of materials used. Facilities that use radioactive gases shall be equipped with ventilation to adequately maintain concentrations to below allowable occupational exposure levels and to not permit escape of the gas to adjacent non-use areas such that concentrations exceed those allowed for uncontrolled areas. These range from no special requirements to those requiring separate exhaust systems equipped with “panic button” shut down switches. The Radiation Safety Program will review the proposed uses and make specific recommendations appropriate for each facility.

_DOHS2010

_{10 CFR 20: Ventilation Considerations} 

_{Stanford University Radiation Safety Manual}

2.  Depending on the type and quantities of radioactive materials or the location of the facility, fume hoods used with volatile radioactive materials have specific design requirements. These are detailed in the Fume Hoods Section of this Design Guide.