The reason the PWR figures are so low compared to competing energy sources is the high power density of nuclear systems. Below is a link detailing the primary circuit component volumes for a VVER-1000 power plant.
The circuit component size is only one thing to consider. There is also the containment building and the cooling towers. Plus, most nuclear plants must have a large area around them unoccupied, for security. Quoting a pro-nuclear site:
"The 1154-MW nuclear power plant can typically occupy about 50 acres of land, often with a buffer space of land area of at least 1 square mile."
Wind power to nuclear power infographic comparison
This author thinks that wind turbines take up much more room than the nuclear plant. That is incorrect. He calculated the space incorrectly. First, he said the capacity factor is 25%. It is closer to 30%, but let us take it as 25%. That means it would take 2,077 2-MW wind turbines to equal one nuclear power plant. Wind turbine tower bases range from 4.3 m to 6.2 m in diameter to 6.2 m. 6.2 m is 19.5 m^2, times 2,077 towers equals 40,435 m^2. That's 10 acres, 5 times less than the nuclear plant. The wind turbines do not need a buffer space of 1 square mile. 1 square mile is 2.596 million square meters. So, the nuclear plant takes up roughly 64 time more space than the wind turbines. Granted, you can use the nuclear plant buffer space for other purposes, such as agriculture, but the same goes for the wind turbines. All of the space around the base of the tower is available for other purposes.
The graphic also wrong because it says wind turbines only last 20 years. The blades in some units last 20 years. The generators last 30 to 40 years, and the towers probably 100 years. The tower is by far the largest and most expensive component.
Also, this graphic lists the size at 2-MW, which may have been the case in 2012, but it is now 2.5 MW for land-based towers.