Gen III reactors have a core catcher[1] to handle a meltdown, in addition to many features making a meltdown even less likely to happen.
[1] https://en.wikipedia.org/wiki/Core_catcher
Every technology has costs. Fossil fuels are killing hundreds of thousands and blighting the lives of tens of millions of asthma sufferers every year.
[1]: https://www.forbes.com/sites/jamesconca/2013/09/29/forget-ea...
Gen III reactors have a core catcher[1] to handle a meltdown, in addition to many features making a meltdown even less likely to happen.
[1] https://en.wikipedia.org/wiki/Core_catcher