§ 835.402  Individual monitoring. 





 
§ 835.403  Area monitoring. 

 


  (a) Measurements of radioactivity concentrations in the ambient 
air of the workplace shall be performed as follows: 
  (1) Air sampling shall be performed in occupied areas where, 
under typical conditions, an individual is likely to receive 
an annual intake of 2 percent or more of the specified ALI values. 
For a given radionuclide and lung retention class, the ALI is 
the product of the DAC listed in appendix A of this part and 
the constant 2.4x10^9 ml. Samples shall be taken as necessary 
to detect and evaluate the level or concentration of airborne 
radioactive material at work locations. 
  (2) Real-time air monitoring, using continuous air monitors 
as defined in § 835.2, shall be performed in normally occupied 
areas where an individual is likely to be exposed to a concentration 
of airborne radioactivity exceeding 1 DAC as specified in appendix 
A of this part or where there is a need to alert potentially 
exposed individuals to unexpected increases in airborne radioactivity 
levels. 
  (3) For the airborne radioactive material that could be encountered, 
real-time air monitors shall have alarm capability and sufficient 
sensitivity to alert potentially exposed individuals that immediate 
action is necessary in order to minimize or terminate inhalation 
exposures. 
  (b) Monitoring of radiation in the workplace shall be performed 
using stationary (area) or portable radiation instruments, or 
a combination thereof. The instruments shall be readily available 
and shall be capable of measuring ambient radiation dose rates 
for the purpose of controlling radiation exposures. 




§ 835.404  Radioactive contamination control and monitoring.