United States Nuclear Regulatory Commission - Protecting People and the Environment

Cobalt-60m

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-60m2 W, see 55Co 1E+6
St. wall
4E+6 2E-3 6E-6 - -
(1E+6) - - - 2E-2 2E-1
Y, see 55Co - 3E+6 1E-3 4E-6 - -
Page Last Reviewed/Updated Thursday, July 10, 2014