Just remember everybody: nuclear power is super safe! Luck is a fucking super-duper strategy for not having nuclear accidents.

   Construction was well under way when Sir John, the director of the Atomic 
   Energy Research Establishment, insisted the filters be installed.
   
   "He saw that if there was a fire, which was probable, there would be no way 
   of stopping radioactive dust escaping into the atmosphere," his son said.
   
   Because they were last-minute additions, the filters were placed atop the 
   two 360ft (110m) tall chimneys rather than at the base.
   [...]
   
   They were roundly criticised by the engineers building the nuclear facility.
   
   Engineers, who had been told by the government to make the UK a nuclear 
   power by 1952, nicknamed the filters Cockcroft's Follies, mocking them as an 
   expensive piece of pointless delay.
   
   However, as one of Sir John's physicists Terence Price said after the fire, 
   "the word folly did not seem appropriate after the accident".
   http://www.bbc.com/news/uk-england-cumbria-29803990