United States Nuclear Regulatory Commission - Protecting People and the Environment

Protactinium-227

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)
91 Protactinium-2272 W, all compounds except
those given for Y
4E+3 1E+2 5E-8 2E-10 5E-5 5E-4
Y, oxides and hydroxides - 1E+2 4E-8 1E-10 - -
Page Last Reviewed/Updated Thursday, July 10, 2014