APPENDIX P
Quantities of Radioactive Materials Requiring Consideration of the
Need for a Contingency Plan for Responding to a Release
Radioactive Material1/ Release Fraction Quantity (GBq) Quantity (Ci)
Actinium-228 0.001 148,000 4,000
Americium-241 0.001 74 2
Americium-242 0.001 74 2
Americium-243 0.001 74 2
Antimony-124 0.01 148,000 4,000
Antimony-126 0.01 222,000 6,000
Barium-133 0.01 370,000 10,000
Barium-140 0.01 1,110,000 30,000
Bismuth-207 0.01 185,000 5,000
Bismuth-210 0.01 22,200 600
Cadmium-109 0.01 37,000 1,000
Cadmium-113 0.01 2,960 80
Calcium-45 0.01 740,000 20,000
Californium-252 0.001 333 9 (20 mg)
Carbon-14 (Non-CO2) 0.01 1,850,000 50,000
Cerium-141 0.01 370,000 10,000
Cerium-144 0.01 11,100 300
Cesium-134 0.01 74,000 2,000
Cesium-137 0.01 111,000 3,000
Chlorine-36 0.5 3,700 100
Chromium-51 0.01 11,100,000 300,000
Cobalt-60 0.001 185,000 5,000
Copper-64 0.01 7,400,000 200,000
Curium-242 0.001 2,220 60