I worked as a field engineer in nuclear power for maintaining reactors. Every plant you go to requires taking a training module before you can get in usually. E

I worked as a field engineer in nuclear power for maintaining reactors. Every plant you go to requires taking a training module before you can get in usually. Every single one had at least a slide showing the Swiss cheese model of "defence in depth". I think it is a fairly good visual and applies great to safety. Every mitigation is silly until it's not.