United States Nuclear Regulatory Commission - Protecting People and the Environment

Cerium-139

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)
58 Cerium-139 W, see 134Ce 5E+3 8E+2 3E-7 1E-9 7E-5 7E-4
Y, see 134Ce - 7E+2 3E-7 9E-10 - -
Page Last Reviewed/Updated Thursday, July 25, 2013