The most important isotopes in spent nuclear fuel are neptunium-237, americium-241, americium-243, curium-242 through -248, and californium-249 through -252.
Ihre wichtigsten Isotope in abgebranntem Kernbrennstoff sind Neptunium-237, Americium-241, Americium-243, Curium-242 bis -248 und Californium-249 bis -252.