Difference between revisions of "Derived air concentration"

From ICRPaedia
Jump to navigation Jump to search
(Created page with "100px|frameless|right|link=ICRP Glossary The DAC is the activity concentration in air in Bq m^(-3)of the radionuclide considered that would lead t...")
 
 
(One intermediate revision by the same user not shown)
Line 1: Line 1:
 
[[File:Glossary Icon-2.png|100px|frameless|right|link=ICRP Glossary]]
 
[[File:Glossary Icon-2.png|100px|frameless|right|link=ICRP Glossary]]
The DAC is the activity concentration in air in Bq m^(-3)of the radionuclide considered that would lead to intake of an annual limit on intake (ALI) assuming a sex-averaged breathing rate of 1.1 m^3 h^(-1) and an annual working time of 2000 h. DAC is given by:
+
The DAC is the activity concentration in air in Bq m<sup>-3</sup> of the radionuclide considered that would lead to intake of an [[annual limit on intake]] (ALI) assuming a sex-averaged breathing rate of 1.1 m<sup>3</sup> h<sup>-1</sup> and an annual working time of 2000 h. DAC is given by:
  
 
<math>
 
<math>
Line 20: Line 20:
 
=== Historically ===
 
=== Historically ===
  
The activity concentration in air (Bq m<sup>-3</sup>) of a radionuclide that would lead to an intake of an ALI (Bq) assuming a sex-averaged breathing rate of 1.1 m<sup>3</sup> <sup>h-1</sup> and an annual working time of 2000 h.
+
The activity concentration in air (Bq m<sup>-3</sup>) of a radionuclide that would lead to an intake of an ALI (Bq) assuming a sex-averaged breathing rate of 1.1 m<sup>3</sup> h<sup>-1</sup> and an annual working time of 2000 h.

Latest revision as of 18:41, 12 August 2021

Glossary Icon-2.png

The DAC is the activity concentration in air in Bq m-3 of the radionuclide considered that would lead to intake of an annual limit on intake (ALI) assuming a sex-averaged breathing rate of 1.1 m3 h-1 and an annual working time of 2000 h. DAC is given by:

[math] DAC_j = \frac{ALI_j}{2200} [/math]

The Commission does not recommend the use of DAC because it considers that for compliance with dose limits it is the total dose from external radiation as well as from intakes of radionuclides that must be taken into account.

(See also annual limit on intake).

Return to Glossary

Previous glossary entries

from ICRP Publication 103, 2007

This equals the annual limit on intake, ALI, (of a radionuclide) divided by the volume of air inhaled by a Reference Person in a working year (i.e.,2.2 103 m3). The unit of DAC is Bq m-3.

Historically

The activity concentration in air (Bq m-3) of a radionuclide that would lead to an intake of an ALI (Bq) assuming a sex-averaged breathing rate of 1.1 m3 h-1 and an annual working time of 2000 h.