United States Nuclear Regulatory Commission - Protecting People and the Environment

Radon-220

Atomic
No.
Radionuclide Class Table 1
Occupational Values
Table 2
Effluent Concentrations
Table 3
Releases to
Sewers
Col. 1 Col. 2 Col. 3 Col. 1 Col. 2
Oral
Ingestion
ALI
(µCi)
Inhalation Air
(µCi/ml)
Water
(µCi/ml)
Monthly
Average
Concentration
(µCi/ml)
ALI
(µCi)
DAC
(µCi/ml)
86 Radon-220 With daughters
removed
- 2E+4 7E-6 2E-8 - -
With daughters
present
- 2E+1
(or 12 working
level months)
9E-9
(or 1.0 working level)
3E-11 - -
Page Last Reviewed/Updated Thursday, July 25, 2013