Fukushima is being very badly reported on by a sensational media. I didn't bother getting into the whole end of the world scenario's on the thread about it because it wasn't worth wasting my time once again shooting down all the sensational emotion filled fact free arguments once again. In 7 years on this site we have been over the arguments ad nauseum. If people want to learn as you did from this thread then they will. If they want to just feel the thrill of potential world ending disaster then that is what they will get because they are not willing to be rational and objective.
Fact #1, the reactor at Fukushima that caused 85% of the problems was scheduled for decommissioning within moths of the time the Tsunami struck. The fuel in it was nearly spent at the end of its useful energy producing lifespan and hence as absolutely radioactive as it would ever be on the day of the disaster. It needed active cooling because it was generating a lot of heat even with the reactor shut down and it didn't get active cooling because of the damage caused by the Tsunami.
Fact #2, expect for a very few cases nobody has been killed, irradiated, injured or physically harmed by Fukushima. The number of dead related to Fukushima is well under 100 the last time I looked. Katrina killed over 1000 and the Tsunami in general passed 19,300!!! Focusing on Fukushima is like having a gaping head wound but worrying about a hangnail.
In order of preference for me of the electric power supplies currently available for human use 1) Geothermal, 2) land based Hydropower, 3) sea based hydropower, 4) Nuclear Fission, 5) Wind, 6) Solar PV. Natural Gas is our best fossil choice and Coal our last resort to get the electricity we need to keep our civilization going while we transition. Unfortunately Solar PV is prohibitively expensive, Wind is intermittent in most locations and rather pricey as well. All of the rest of my preferred choices have multiple groups objecting to their use.
Always appeal to a man's enlightened self interest, you can trust him to look out for himself honestly, It's when you appeal to his Honor or the Common Good that he stops paying attention.