1.5 percent of all nuclear power plants ever built have melted down to some degree

Meltdowns have been either catastrophic (Chernobyl, Ukraine in 1986; three reactors at Fukushima Dai-ichi, Japan in 2011) or damaging (Three-Mile Island in 1979; Saint-Laurent France in 1980). The nuclear industry has proposed new reactor designs that they suggest are safer. Dont say do more reasearch i have although it is very unlikely for a Nuclear catastrophic event there is still that chance were things could go very bad.