In the causal interpretation of quantum theory of David Bohm and Louis de Broglie, it is in principle possible to predict the decay of a single isotope (single event). In the causal interpretation of quantum theory there is a the quantum potential, which leads to highly nonclassical motion of particles.
Reference:
"Radioactive Decay in the Causal Interpretation of Quantum Theory" from The Wolfram Demonstrations Project
Contributed by: Klaus von Bloh