Rajan Wilcox
Nuclear power plants are expensive to build but cheap to run, with fuel costs making up a minor proportion of total generating costs. The cost of electricity from nuclear power is calculated using the levelized cost of electricity (LCOE), which is the total cost to build and operate a power plant over its lifetime divided by the total electricity output. The high upfront costs of nuclear power plants have created the perception that they are more expensive than other technologies, such as solar power. However, nuclear power is cost-competitive with other forms of electricity generation, including fossil fuels, in many places. Nuclear power is also considered a low-carbon energy source, making it an attractive option in the fight against climate change. While some researchers argue that the true costs of nuclear power, including waste disposal, are higher than previously estimated, others maintain that nuclear power is a relatively inexpensive and clean energy source.
| Characteristics | Values |
|---|---|
| Operating costs | Nuclear power plants have lower operating costs than fossil fuel plants. |
| Fuel costs | Nuclear power plants have lower fuel costs than fossil fuel plants. |
| Capital costs | Nuclear power plants have higher capital costs than fossil fuel plants. |
| Environmental impact | Nuclear power plants have lower greenhouse gas emissions than fossil fuel plants. |
| Waste disposal | Nuclear power plants have higher waste disposal costs than fossil fuel plants. |
| Safety | Nuclear power plants have a risk of meltdowns and radioactive contamination. |
| Levelized cost of electricity (LCOE) | Nuclear power plants have a lower LCOE than fossil fuel plants when carbon pricing is factored in. |
| Social and health impact | Nuclear power plants may have hidden social and health costs that are not included in the LCOE. |
| Political risk | Nuclear power plants may be subject to higher taxation, increasing overall costs. |
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What You'll Learn
Nuclear power is cost-effective
Nuclear power is cost-competitive with other forms of electricity generation, except where there is direct access to low-cost fossil fuels. The long service life and high capacity factor of nuclear power plants allow sufficient funds for ultimate plant decommissioning and waste storage and management to be accumulated, with little impact on the price per unit of electricity generated. Additionally, measures to mitigate climate change such as a carbon tax or carbon emissions trading favour the economics of nuclear power over fossil fuel power.
Nuclear power is the cleanest and most land and resource-efficient source of energy, one of the safest sources of energy, and also one of the most powerful. These benefits save money from dealing with externalities, so they need to be considered against the raw monetary cost. Nuclear power has lower intermittency and can be sited within a few kilometres of any city or industrial area, so a system that relies on nuclear power ends up costing much less than a system that relies on solar panels and wind turbines.
Nuclear electricity costs in Ontario, Canada's only province with a significant proportion of grid power from nuclear energy, are low. New reactors with improved efficiency or differing methods of energy extraction will not only improve safety but also lower the cost per kilowatt-hour. Once the infrastructure is built, operating costs are low for this non-renewable resource, mainly because less fuel is needed than coal or gas to generate comparable wattage. It is also reliable, making it valuable for money.
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Fossil fuels are expensive
The basic economics metric for any generating plant is the levelized cost of electricity (LCOE). It is the total cost to build and operate a power plant over its lifetime divided by the total electricity output dispatched from the plant over that period, hence the typical cost per megawatt-hour. It takes into account the financing costs of the capital component (not just the 'overnight' cost). On a levelized (i.e. lifetime) basis, nuclear power is an economic source of electricity generation, combining the advantages of security, reliability, and very low greenhouse gas emissions.
The long service life and high capacity factor of nuclear power plants allow sufficient funds for ultimate plant decommissioning and waste storage and management to be accumulated, with little impact on the price per unit of electricity generated. Additionally, measures to mitigate climate change, such as a carbon tax or carbon emissions trading, favor the economics of nuclear power over fossil fuel power. Nuclear power is cost-competitive with renewable generation when the capital cost is between $2000 and $3000/kW.
The amount of nuclear fuel needed to produce electricity is exponentially less than for fossil fuels – one kilogram of natural uranium will yield about 20,000 times as much energy as the same amount of coal. Nuclear fuel is also steadily improving in terms of efficiency and cost reduction. If the social, health, and environmental costs of fossil fuels are also taken into account, the competitiveness of nuclear power is improved.
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Nuclear waste disposal is costly
Nuclear power plants are expensive to build but cheap to run. In many places, nuclear energy is competitive with fossil fuels as a means of electricity generation. However, nuclear waste disposal is costly.
Nuclear waste is accumulating at sites across the United States, and the country has failed to implement a permanent solution for nuclear waste storage and disposal. This is costing Americans billions of dollars per year. The Nuclear Waste Policy Act of 1982 created a tax on electricity generated by nuclear power plants to build a geologic repository for waste disposal, but this has not been successful. The projected total cost of cleaning up after the Manhattan Project is over $300 billion.
The Department of Energy (DOE) is responsible for disposing of certain low-level nuclear waste from medical equipment, metals in nuclear reactors, and cleanup sites. However, the fund to clean up these plants is likely insufficient, with cleanup costs potentially exceeding the fund amount by $45 billion. DOE is also working to convert DUF6, a dangerous byproduct of the uranium enrichment process, which is estimated to cost at least $7.2 billion.
The true costs of nuclear waste disposal are difficult to assess. While nuclear power plants have relatively low operating costs, waste disposal and decommissioning costs are included in these operating costs. The levelized cost of energy (LCOE) represents the price electricity must fetch for the project to break even, taking into account all lifetime costs. Nuclear waste disposal costs represent about 10% of the total costs of producing electricity from a nuclear power plant. While these costs do not render nuclear power uneconomic, they are still high.
Furthermore, new research suggests that the true costs of nuclear power are greater than previously indicated. Models by Barron and Hill found that nuclear waste disposal is 2.5 to 4 times more expensive than previously estimated. Nuclear power may not be a cost-effective low-carbon energy source, and more research is needed to determine its role in a low-carbon future.
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Nuclear fuel is efficient
Nuclear power plants are expensive to build but relatively cheap to run. In many places, nuclear energy is competitive with fossil fuels as a means of electricity generation. Fuel costs for nuclear plants are a minor proportion of total generating costs. Nuclear fuel is also steadily improving in terms of efficiency and cost reduction. Uranium, the main fuel for nuclear reactors, has the advantage of being a highly concentrated source of energy. One kilogram of natural uranium will yield about 20,000 times as much energy as the same amount of coal. Uranium contains millions of times more energy per mass than any other fuel source, meaning less fuel, less waste, and more electricity generated.
Nuclear power plants are typically used more often than other energy sources because they require less maintenance and are designed to operate for longer stretches before refuelling (typically every 1.5 or 2 years). Natural gas and coal capacity factors are generally lower due to routine maintenance and/or refuelling at these facilities. Renewable plants are considered intermittent or variable sources and are mostly limited by a lack of fuel (i.e. wind, sun, or water). As a result, these plants need a backup power source or they can be paired with a reliable baseload power like nuclear energy.
Nuclear power is a low-cost, low-carbon energy source. Nuclear reactors do not emit carbon dioxide and are carbon-free. However, nuclear waste may harm future generations. Nuclear waste disposal is also 2.5 to 4 times more expensive than other models have suggested. Nuclear power plants also require high upfront investments, taking decades and billions of dollars to build.
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Nuclear power is competitive
Nuclear power is cost-competitive with other forms of electricity generation, except where there is direct access to low-cost fossil fuels. Fuel costs for nuclear plants are typically about one-third of those for a coal-fired plant and between one-quarter and one-fifth of those for a gas combined-cycle plant. Uranium is highly concentrated, and a small amount is needed to generate power, so a sudden price increase would have a minimal effect on customers.
Nuclear power is also competitive in areas where other fuel resources are not readily available. France, for example, has almost no native supplies of fossil fuels, so nuclear power is a more economical choice. Nuclear power is also favoured by measures to mitigate climate change, such as a carbon tax or carbon emissions trading.
However, some researchers argue that the true costs of nuclear power are greater than previously indicated, particularly when it comes to waste disposal, the cost of which may be 2.5 to 4 times higher than previously thought. The decision to increase reliance on nuclear energy is a complex one, as it is difficult to assess the impact on future generations.
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Frequently asked questions
Nuclear power plants are expensive to build but relatively cheap to run. Nuclear energy is cost-competitive with other forms of electricity generation, except where there is direct access to low-cost fossil fuels.
The high upfront cost of nuclear energy is due to massive private interest costs, high capital costs, and the cost of paying interest on loans.
Nuclear energy is generally cheaper than renewable energy sources like solar and wind, which cannot economically serve as large-scale replacements for baseload fossil-fuelled plants.
Nuclear energy may have hidden costs in the long term, such as the permanent disposal of radioactive waste, which has not yet been achieved by any country. Power plant meltdowns can also create long-lasting radioactive contamination.
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