United States Nuclear Regulatory Commission - Protecting People and the Environment

Actinium-227

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-227 D, see 224Ac 2E-1
Bone surf
4E-4
Bone surf
2E-13
(4E-1) (8E-4) 1E-15 5E-9 5E-8
W, see 224Ac 2E-3
Bone surf
7E-13
(3E-3) 4E-15
Y, see 224Ac 4E-3 2E-12 6E-15
Page Last Reviewed/Updated Thursday, November 01, 2018