United States Nuclear Regulatory Commission - Protecting People and the Environment

Cerium-137m

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-137m W, see 134Ce 2E+3
LLI wall
4E+3 2E-6 6E-9 - -
(2E+3) - - - 3E-5 3E-4
Y, see 134Ce - 4E+3 2E-6 5E-9 - -
Page Last Reviewed/Updated Thursday, July 25, 2013