I don't think there is a non-nuclear munition that can do the job. Iranians built their nuclear plants under tall mountains. One could strike some exits, but not all of them - and they would be cleared soon. There would be no damage to the plant itself. Besides, nobody knows where the manufactured nuclear materials for the bomb are at any given time. Probably they are not at the plant anymore. One could assemble the bomb in a shed, or in a cave, or on a ship, or in an apartment in some city. If Iranians are serious, all the non-nuclear components are ready, and assembled, and tested. Perhaps it's only a matter of inserting the nuclear core, running diagnostics, and closing the lid.
Israel's best bet at this time is to negotiate. Putin is not particularly interested in Iran getting the bomb. But what can be done, outside of a sudden regime change in Iran, to stop that? Any military action will only prompt Mullahs to use what they have made by this time. Just one bomb will destroy one city, but it will also contaminate most of Israel. It's a small country.
The way to take down the Iranian threat is an EMP strike or strikes on the Iranians. If nothing electrical in Iran works, they are rendered deaf, dumb, and blind in seconds. No electronic media, communications, no pumps to move oil or water, no ground transport besides animals — a nightmare for Iran. Iran would descend into chaos.
EMP does not have to have a nuclear event to trigger the pulse, it can be done with conventional explosives. From Wikipedia on EMP:
“Non-nuclear electromagnetic pulse (NNEMP)
Non-nuclear electromagnetic pulse (NNEMP) is a weapon-generated electromagnetic pulse without use of nuclear technology. Devices that can achieve this objective include a large low-inductance capacitor bank discharged into a single-loop antenna, a microwave generator and an explosively pumped flux compression generator.
To achieve the frequency characteristics of the pulse needed for optimal coupling into the target, wave-shaping circuits and/or microwave generators are added between the pulse source and the antenna. Vircators are vacuum tubes that are particularly suitable for microwave conversion of high-energy pulses.
NNEMP generators can be carried as a payload of bombs, cruise missiles (such as the CHAMP missile) and drones, with diminished mechanical, thermal and ionizing radiation effects, but without the political consequences of deploying nuclear weapons.
The range of NNEMP weapons (non-nuclear electromagnetic pulse bombs) is much less than nuclear EMP. Nearly all NNEMP devices used as weapons require chemical explosives as their initial energy source, producing only one millionth the energy of nuclear explosives of similar weight.
The electromagnetic pulse from NNEMP weapons must come from within the weapon, while nuclear weapons generate EMP as a secondary effect. These facts limit the range of NNEMP weapons, but allow finer target discrimination.
The effect of small e-bombs has proven to be sufficient for certain terrorist or military operations. Examples of such operations include the destruction of electronic control systems critical to the operation of many ground vehicles and aircraft.”
The Russians are counting on keeping the various nationalities and sectarian groups pointing their weapons (so far, conventional only) at each other instead of at Russia, which isn’t that far off what the US does, or for that matter, what China does when necessary. India’s emergence as a great power and Pakistan’s steady disintegration means that what happens in Iran in particular has more importance to both Russia and China, and also in India.
And what happens in Pakistan is of great concern in Iran, which is a patchwork of different ethnic groups, just as Pakistan and most of Middle East and moslem world is and has been for some time now. Reconsolidation of Afghanistan and Pakistan into as many as a dozen new states will probably be a done deal in less than a generation.
The metal ores in Africa (whatever petroleum is there is largely already in development) are the current big play, and Russia has been out of play in Africa for some years; China’s in Sudan and here and there trying to get a toe in elsewhere, mostly in the rest of the Horn; the big player is Iran, and this is a great danger to us.