United States Nuclear Regulatory Commission - Protecting People and the Environment

Thorium-234

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-234 W, see 226Th 3E+2
LLI wall
2E+2 8E-8 3E-10 - -
(4E+2) - - - 5E-6 5E-5
Y, see 226Th - 2E+2 6E-8 2E-10 - -
Page Last Reviewed/Updated Thursday, July 10, 2014