United States Nuclear Regulatory Commission - Protecting People and the Environment

Cobalt-58

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)
27 Cobalt-58 W, see 55Co 2E+3 1E+3 5E-7 2E-9 2E-5 2E-4
Y, see 55Co 1E+3 7E+2 3E-7 1E-9 - -
Page Last Reviewed/Updated Thursday, July 10, 2014