You may have seen the famous test of ramming a F4 Phantom into a reinforced concrete walls without much effect: https://www.youtube.com/watch?v=F4CX-9lkRMQ
It's certainly possible to blow them up, but they very unlikely to melt down like Chernobyl did anymore due to all the effort put into preventing that. Easier to just launch radioactive materials at your enemy if that's the result you want.
§ 50.150 Aircraft impact assessment.
https://www.nrc.gov/reading-rm/doc-collections/cfr/part050/p...
Containment buildings for nuclear reactors are the strongest non-military buildings ever build. You need something much stronger than a small airplane, or simple drone, missile to breach it. Even a 155mm artillery granite or a anti-tank missile is not enough. You would probably need specialize bunker buster munition, or nuclear explosion.
https://en.wikipedia.org/wiki/Containment_building
The Russian army will not directly attack nuclear power plants in Ukraine. They could not gain much from release of radioactive material as the radioactive material would also migrate to Russia. The Russian army is attacking the infrastructure connecting power plants to the grid, to deny the electricity production. (And is attacking must power infrastructure in Ukraine).
https://www.reuters.com/world/europe/russia-hits-several-key...
Error rather than intentional targetting has to be considered.
Imagine a cruise missile (e.g. tomahawk) or a bunker buster bomb rather than an anti-tank missile.
The premise that such plants will not be targetted may apply to Russia (I doubt it) but may not apply to Israel or the USA.
A collision at 50 km/h is going to have roughly 1% the force of one at 500km/h.
Probably not even the same order of magnitude. A blown-up nuclear reactor would be WAY worse in short- and long-term effects (and cleanup costs) than a blown-up coal power plant producing comparable MW.
(See: Fukushima and Chernobyl.)
In both the amount of released radionuclides and health effects of the accidents, Chernobyl accident was much, much bigger than Fukushima.
It also does the same thing to heavy metals in the coal like arsenic, lead, cadmium and mercury. More than 90% of coal is carbon and therefore becomes CO2, but because of the huge difference in energy density, the coal plant has to burn millions of times more coal than nuclear reactors consume uranium, and thereby generates tens of thousands of times more toxic and radioactive coal ash than the nuclear plant generates nuclear waste.
Then they put the stuff into "wet surface impoundments" which is industry for dumping the toxic sludge into a lake. Those things frequently poison entire towns without any kind of terrorist attack.
I can't speak to that. But nearly 50 years ago I did a deep dive into what would likely happen in the event of a nuclear "accident" (a term of art) in a Navy ship's reactor in port. This was when I was doing the Navy's prep course for the [chief] engineer exam after two years of sea duty running aircraft-carrier reactors. Current-design civilian reactors are much larger, so the effects of a missile-strike meltdown would be correspondingly worse. If I had to guess, it'd be far worse than even the missile strike you postulate.
Footnote: AFAIK there has never been a nuclear accident aboard a Navy ship, submarine or otherwise. That's something in which nukes take immense pride. It's largely because of the zero-defect, second-checking culture ferociously instilled by Admiral Hyman Rickover during his decades in charge of "The Program."
Back to non-missile dangers: Human error is what I've always worried about for nuclear power plants. From what's been made public, both Three Mile Island and Chernobyl could easily have been averted — had it not been for cascades of operator errors. Can we confidently say that such errors are less likely today? To be sure, many civilian nuclear plants in the U.S. are run by Navy veterans. But my guess is that working in such plants doesn't provide the same motivations and incentives as "the Fleet." (And a flock of suicide drones won't care either way.)
Relatedly: I was just reading an account of Air France Flight 447, which flew itself into the middle of the South Atlantic — killing all aboard — because of cascades of egregious pilot error that defeated all the autopilot systems.
(0) https://co2coalition.org/2024/05/21/coals-importance-for-sol...
(0) https://www.researchgate.net/publication/335083312_Why_do_we...
https://www.solar.com/learn/what-is-the-carbon-footprint-of-...
That link is also using an average including older reactors that require more highly enriched uranium (enrichment is energy-intensive), newer designs that can run on natural or low enrichment uranium can do 1.31g/kWh:
https://www.frontiersin.org/journals/energy-research/article...
The same holds for hydro. Even worse, there would be no time for evacuation. Yet nobody is considering banning dams.
Edit to add: Before anyone jumps on for this it's important to note that without the Banquiao disaster the rates are about the same. Still means "nuclear is unsafe" is kind of a red herring.
The precise mechanism was: radioactive particles fall to ground, or are washed to ground by rain, which concentrates them on vegetation with a lot of surface especially leafy vegetables, grass. Leafy vegetables are eaten directly by humans. Grass is eaten by cows, which again concentrates the radionuclides in milk. Humans drink milk, eat cheese concentrated from milk.
Not all radionuclides produced in nuclear fission have the same health impact on population in case of a nuclear disaster. To have a significant health hazard a radionuclide needs to have 3 properties: volatility, half-life, bioaccumulativity.
Volatility - some radioactive elements (heavy metals) are not moved far away by air, some radioactive elements like radioactive noble gases dilute very fast.
Stuff with a short half-life will transform into stable elements before migrating far. Stuff with with very long half-life will not produce much radiation during human lifetime.
Bioaccumulativity, radioactive stuff needs to stay in body to do damage. If it's eaten and then pooped out next day it usually doesn't cause much damage.
Most dangerous for general public in case of nuclear disasters are:
Iodine-131 (half-life 8 days): Iodine is stored in thyroid gland and stays in for long time in body. Especially children need a lot of iodine per kilogram of body weight. In regions where there is not enough of iodine in food (lacking seafood, table salt without added iodine), human body will try to get every bit of iodine from environment and hold it in body as long as possible.
Cesium-137 (half-time 30.04 years) : Alkali metal that forms salts. Has tendency to accumulate in soft tissues.
Strontium-90 (half-time 28.91 years) : Chemically similar to calcium. Has tendency to be incorporated into bones, teeth and stay in body for very long time.
https://hps.org/publicinformation/ate/q10097/
Big part of radiation dose to the population could be prevented if the Soviet state didn't tried to cover up the Chernobyl and would prevent people from eating local food and milk, because most of the damage is done by eating iodine-131 in the first weeks after accident. Timely administration of potassium iodide tables would also help.
Chernobyl liquidators were affected with much broader range of radionuclides (radioactive stuff that did not migrate far) and with much high concentrations (radioactive stuff was not diluted much).
Direct deaths: 2 killed by debris (including 1 missing) and 28 killed by acute radiation sickness.
https://en.wikipedia.org/wiki/Chernobyl_disaster
There many estimates about impact of Chernobyl disaster. I think the most comprehensive study is from Chernobyl Forum.
"On the death toll of the accident, the report states that 28 emergency workers died from acute radiation syndrome and 15 patients died from thyroid cancer. It roughly estimates that cancers deaths caused by the Chernobyl accident might eventually reach a total of up to 4,000 among the 600,000 cleanup workers or "liquidators" who received the greatest exposures."
Do not underestimate excess water.
A government affidavit in 2006 stated the leak caused 558,125 injuries including 38,478 temporary partial injuries and approximately 3,900 severely and permanently disabling injuries.
https://en.wikipedia.org/wiki/1975_Banqiao_Dam_failure
"After the disaster, the Chinese Communist Party and the Chinese government remained silent to the public, while no media were allowed to make reports."
"The official documents of this disaster were considered a state secret until 2005 when they were declassified."
If Ukraine didn't have nuclear energy they would be blacked out now.
Russia has bombed the switchyards and trandformers of other NPPs though.