4 Other recently announced nuclear power plant costs estimates are in the same range as Florida Power & Light. For example, Progress Energy has projected a cost of about $10.5 billion for two new nuclear units with financing costs bringing the total up to about $13-14 billion. 5 However, Progress Energy has not yet released any of the details underlying this cost estimate. For example, as recently as the years 2000-2002, the industry and Department of Energy were talking about overnight costs of $1,200/kW to $1,500/kW for new nuclear units. 1 This range of estimated overnight costs suggested total plant costs of between $2 and $4 billion per new nuclear unit. For a typical 1,000 MWe BWR or PWR, the approximate cost of fuel for one reload (replacing one third of the core) is about $40 million, based on an 18-month refueling cycle. The average fuel cost at a nuclear power plant in 2014 was 0.76 cents / kWh. Because nuclear plants refuel every 18-24 months, they are not subject to fuel price volatility like natural gas and oil power plants. The average non-fuel O&M cost for a nuclear power plant in 2014 was 1.64 cents / kWh. Production Costs. Production costs are the O&M and fuel costs at a power plant. However, the estimated costs for new nuclear power plants begin to increase significantly starting in about 2006-2007. For example: • A June 2007 report by the Keystone Center estimated an overnight cost of $2,950/kW for a new nuclear plant. For example, as recently as the years 2000-2002, the industry and Department of Energy were talking about overnight costs of $1,200/kW to $1,500/kW for new nuclear units. 1 This range of estimated overnight costs suggested total plant costs of between $2 and $4 billion per new nuclear unit. Nuclear energy facilities are able to produce electricity with low cost and stable prices using enriched uranium for fuel. One uranium fuel pellet—about the size of the tip of a pencil eraser—produces the same energy as 17,000 cubic feet of natural gas, 1,780 pounds of coal or 149 gallons of oil. Nuclear energy has tremendous price stability because fuel accounts for just 31 percent of production costs. Fuel costs are closer to 80 or 90 percent when electricity is produced by burning coal or natural gas. This makes electricity from fossil-fuel plants highly susceptible to fluctuations in coal and gas prices. Companies that are planning new nuclear units are currently indicating that the total costs (including escalation and financing costs) will be in the range of $5,500/kW to $8,100/kW or between $6 billion and $9 billion for each 1,100 MW plant. For example, as recently as the years 2000-2002, the industry and Department of Energy were talking about overnight costs of $1,200/kW to $1,500/kW for new nuclear units. 1 This range of estimated overnight costs suggested total plant costs of between $2 and $4 billion per new nuclear unit. Fuel costs make up 30 percent of the overall production costs of nuclear power plants. Fuel costs for coal, natural gas and oil, however, make up about 80 percent of the production costs. 1  Fuel as a Percentage of Electric Power Industry Production Costs (2013). The average non-fuel O&M cost for a nuclear power plant in 2014 was 1.64 cents / kWh. Production Costs. Production costs are the O&M and fuel costs at a power plant. Still, even as an optimistic estimate, it seems to indicate that nuclear could be having trouble keeping up with the rest of the industry. Wind, although intermittent, costs $1,300 a kilowatt. Flow batteries for storing wind power sell for $4,000 a kilowatt. Compressed air can cost $1,000 per kilowatt.  On average fuel for nuclear power plants make up around 25% of the cost of production which is in contrast to coal, oil and natural gas plants where fuel is 80% of the cost of production. The overnight cost (meaning without incurred interest) of nuclear power plants is between US$2 to US$2.5 billion for a plant with two conventional reactors and generating about 2 gigawatts. Staffing a 1GW uranium plant costs $50 million per year and fuel costs $30 million per year (20,000kg of uranium). The average fuel cost for nuclear power is $0.77 per kWh and the average non-fuel operations and maintenance cost in 2012 was 1.65 cents/kWh. The overnight cost (meaning without incurred interest) of nuclear power plants is between US$2 to US$2.5 billion for a plant with two conventional reactors and generating about 2 gigawatts. Several large nuclear power plants were completed in the early 1970s at a typical cost of $170 million, whereas plants of the same size completed in 1983 cost an average of $1.7 billion, a 10-fold increase. Some plants completed in the late 1980s have cost as much as $5 billion, 30 times what they cost 15 years earlier. 
http://www.synapse-energy.com/sites/default/files/SynapsePaper.2008-07.0.Nuclear-Plant-Construction-Costs.A0022_0.pdf http://www.nei.org/Knowledge-Center/Nuclear-Statistics/Costs-Fuel,-Operation,-Waste-Disposal-Life-Cycle http://www.synapse-energy.com/sites/default/files/SynapsePaper.2008-07.0.Nuclear-Plant-Construction-Costs.A0022_0.pdf http://www.nei.org/Why-Nuclear-Energy/Reliable-Affordable-Energy/Electricity-Supply http://www.synapse-energy.com/sites/default/files/SynapsePaper.2008-07.0.Nuclear-Plant-Construction-Costs.A0022_0.pdf http://www.nei.org/Knowledge-Center/Nuclear-Statistics/Costs-Fuel,-Operation,-Waste-Disposal-Life-Cycle http://www.greentechmedia.com/articles/read/how-much-does-nuclear-cost-6000-a-megawatt-at-least http://nuclearradiophobia.blogspot.com/p/cost-of-nuclear-power.html http://nuclearradiophobia.blogspot.com/p/cost-of-nuclear-power.html http://www.phyast.pitt.edu/~blc/book/chapter9.html
how much does nuclear energy cost?