Both Coal and Nuclear provide excellent base load electrical generation. Both are in a league of their own for cost and reliability.
So why should we replace the coal plant with nuclear? Why not keep things diversified? Can we not use the coal as spinning reserve for wind?
Besides the CO2 emissions, there is another very good reason why we should build more nuclear and use it the retire coal fired plant. (which of course means we can then forget about the nightmare of wind and its intermittency)
It is in a table at DECC Here screenshot below.
Need I say more?