Since the plant is the focus node of a fanout of electrical high-tension wires and towers, an EMP strike will surge lightning-like currents down the wires and throughout the plant destroying the generator-turbines and all reactor control electronics. It would takes years to rebuild. In the mean time, the containment dome is a nice secure place for Iran to store the Russian fuel rods it can't make use of -- no radiation issues at all. Conventional-explosives-pumped EMP bombs will do it nicely.
Thousands attend an anti-violence and incitement rally at Tel Aviv's Rabin Square (Haaretz)
from the article: Ex-U.S. diplomat: Israel unlikely to strike Iran nuclear plant