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Table 4.
Adapted from currently recommended List of Radionuclides and Grouping for Consequence assessment – NUREG/CR-7270.
| Group Number (GROUP) | Chemical Group (GRPNAM) | Radionuclides (NUNAM) |
|---|---|---|
| 1 | Noble Gas | Kr-85, Kr-85m, Kr-87, Kr-88, Xe-133, Xe-135, Xe-135m |
| (Xe) | ||
| 2 | Alkali Metals | Rb-86, Rb-88, Cs-134, Cs-136, Cs-137 |
| (Cs) | ||
| 3 | Alkali Earths | Sr-89, Sr-90, Sr-91, Sr-92, Ba-137m, Ba-139, Ba-140 |
| (Ba) | ||
| 4 | Halogens | I-131, I-132, I-133, I-134, I-135 |
| (I) | ||
| 5 | Chancogens | Te-127, Te-127m, Te-129, Te-129m, Te-131, Te-131m, Te-132 |
| (Te) | ||
| 6 | Platinoids | Ru-102, Ru-105, Ru-106, Rh-103m, Rh-105, Rh-106 |
| (Ru) | ||
| 7 | Early Transition | |
| Elements | Co-58, Co-60, Nb-95, Nb-97, Nb-97m, Mo-99, Tc-99m | |
| (Mo) | ||
| 8 | Tetravalents | Zr-95, Zr-97, Ce-141, Ce-143, Ce-144, Np-239, Pu-238, |
| (Ce) | Pu-239, Pu-240, Pu-241 | |
| 9 | Trivalents | Y-90, Y-91m, Y-92, Y-93, La-140, La-141, La-142, Pr-143, |
| (La) | Pr-144, Pr-144m, Nd-147, Am-241, Cm-242, Cm-244 | |
| 10 | More volatiles | Sb-127, Sb-129 |
| (MELCOR | main group metals | |
| Class 11) | (Cd) |
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