United States Nuclear Regulatory Commission - Protecting People and the Environment

Yttrium-91

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)
39 Yttrium-91 W, see 86mY 5E+2
LLI wall
2E+2 7E-8 2E-10 - -
(6E+2) - - - 8E-6 8E-5
Y, see 86mY - 1E+2 5E-8 2E-10 - -
Page Last Reviewed/Updated Thursday, July 25, 2013