Table 0.5 Daily and Annual Limits on Radionuclide Oral Intake® Radionuclide Occupational Exposure pCi/d Ba/y* Ces ium-137 296,000 4 x 106 9870 73,000 1 x 106 2460 3700 5 x 104 123 14800 2x 10° 490 Stront ium-90 Americ ium-241 Plutonium-239 Plutonium-240 General Population pCi/d 4 Ref. 31 which gives the annual limit of intake (ALI) (Bq) for workers. We use 1/30th of this value for the general population average. .074 = daily limit of intake (pCi). 9000129 a ALI (Bq) x