United States Nuclear Regulatory Commission - Protecting People and the Environment

Neptunium-238

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)
93 Neptunium-238 W, all compounds 1E+3 6E+1
Bone surf
3E-8 - 2E-5 2E-4
- (2E+2) - 2E-10 - -
Page Last Reviewed/Updated Thursday, July 25, 2013