This keeps beeing peddled by the pro-nuclear fraction, but you are comparing apples and oranges: the "large number of people die" is based on "if you burn coal without any filters, in particular if you do it in a little hut in a third world country with no proper chimney, it's really really bad for your health".
Nuclear power plants require modern technology for high safety standards. Coal power plants on anything than a very basic technology level all have filters that scrub the sulphur etc. Outside of third world countries, nobody dies from coal. It's not even a health problem.
The problem with coal and other fossil fuels is that they use up limited resources, and they put back the CO2 into the atmosphere that has been extracted by plans over millions of years, causing global warming.
The problem with nuclear is that when it goes boom (and it has done so about once every 20 years since we have nuclear), it leaves a large area inhabitable for a long time. Which is a big problem in a densely populated country like mine. Also, at least in my country, even though we are using nuclear for about 60 years now, nobody has figured out a safe way to store the nuclear waste - it just gets moved around from one failed attempt to the next.
The "lots of people die from coal" vs. "nobody dies from nuclear" story (which are both distortions, conveniently in different directions to match the ideology of those bringing it up) is a red herring.