Nuclear power has shown to be a dangerous and unpredictable source of energy--see Chernobyl, 3 Mile Island, etc.
No.
One of those times where a single word answer is no good.
Nobody died at Three Mile Island. Security measures even in 1970s standard worked. It's like pointing to a BMW accident where everyone survived as proof that BMWs are unsafe.
Fossil fuels have significant direct mortality rates associated to them where as nuclear is 0. A lot of the fear of nuclear power comes from the misconception that it has anything to do with a nuclear bomb. Nuclear power plant reactors and nuclear bombs are like comparing apples with apple-flavored Jolly Ranchers. Blowing up a nuclear power plant cannot cause a mushroom cloud.
Even if we want to go into indirect deaths (estimations of how many people will die of cancer from radiation leaked at Fukishama), it still pales in comparison to the indirect deaths in the mining of precious metals in Africa that compose solar panels. Or environmental displacement by hydroelectric dam construction.
The only energy that is truly environmentally safe is wind and it's wholly inadequate. In all other scenarios, you are playing a game of risk and the sheer amount of energy nuclear can produce means per accident it's a good deal as a opposed to per accident at an oil rig, a dam, a platinum mine, a coal mine, or a wind turbine manufacturing plant.
In other words, "No."
Even wind is not completely safe. It is a risk to wildlife and causes sonic disturbance that can have health effects.
