United States Nuclear Regulatory Commission - Protecting People and the Environment

Actinium-228

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)
89 Actinium-228 D, see 224Ac 2E+3 9E+0
Bone surf
4E-9 - 3E-5 3E-4
- (2E+1) - 2E-11 - -
W, see 224Ac - 4E+1
Bone surf
2E-8 - - -
- (6E+1) - 8E-11 - -
Y, see 224Ac - 4E+1 2E-8 6E-11 - -
Page Last Reviewed/Updated Thursday, July 25, 2013