Thorium-231

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)
90 Thorium-231 W, see 226Th 4E+3 6E+3 3E-6 9E-9 5E-5 5E-4
Y, see 226Th - 6E+3 3E-6 9E-9 - -

Page Last Reviewed/Updated Thursday, March 25, 2021