United States Nuclear Regulatory Commission - Protecting People and the Environment

Hafnium-181

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)
72 Hafnium-181 D, see 170Hf 1E+3 2E+2
Bone surf
7E-8 2E-5 2E-4
(4E+2) 6E-10
W, see 170Hf 4E+2 2E-7 6E-10
Page Last Reviewed/Updated Thursday, November 01, 2018