United States Nuclear Regulatory Commission - Protecting People and the Environment

Actinium-226

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-226 D, see 224Ac 1E+2
LLI wall
3E+0
Bone surf
1E-9 - - -
(1E+2) (4E+0) - 5E-12 2E-6 2E-5
W, see 224Ac - 5E+0 2E-9 7E-12 - -
Y, see 224Ac - 5E+0 2E-9 6E-12 - -
Page Last Reviewed/Updated Thursday, July 10, 2014