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The Power of a Uranium Pellet



Uranium pellet energy compared to fossil fuels

The Energy Efficiency of a Uranium Pellet

Nuclear energy’s incredible efficiency and powerful nature comes from uranium’s high energy density.

It is the most energy dense and efficient fuel source we have, with just ten uranium pellets able to power the average household for an entire year.

Using research from the U.S. Department of Energy, this graphic puts in perspective the efficiency of a single uranium pellet in comparison to fossil fuels.

Uranium’s Energy Density vs. Fossil Fuels

Uranium’s energy efficiency comes from it’s highly dense atomic and material nature, which is split apart when nuclear fission occurs.

It is the second-heaviest metal in terms of relative atomic mass, and is also one of the densest at around 19 g/cm3. For context, a gallon of milk weighs around 8 lbs, while a same-sized container of uranium would weigh around 150 lbs.

In the process of nuclear fission, the U-235 isotope of uranium is hit by a moving neutron and splits in two. This splitting of the atom produces heat energy and releases more neutrons that hit other U-235 atoms, causing a chain reaction of nuclear fission.

The energy generated by the fission of a single uranium pellet is equivalent to:

  • 1 ton of coal or
  • 120 gallons of crude oil or
  • 17,000 ft3 of natural gas

With about 17 million British Thermal Units (BTU) worth of energy in a uranium pellet, it’s no wonder that many are now looking at nuclear energy as a key piece to the clean energy puzzle.

Not Just Better than Fossil Fuels

Nuclear power isn’t just an improvement over fossil fuels, it also beats out renewable energy sources in a few other key areas. Along with low lifecycle emissions, nuclear power also has a low land footprint and the highest reliability compared to other sustainable energy sources.

1. CO2 Lifecycle Emissions

As a non-fossil fuel source of energy, nuclear power has one of the lowest average life cycle CO2 emissions among energy technologies. Since 1970, nuclear power plants have reduced over 60 gigatonnes of CO2 emissions, and have lower average life cycle emissions compared to solar panels, geothermal energy, and hydropower.

2. Land Footprint

While reducing carbon emissions is great, renewable energy sources are also judged on their land footprint. Nuclear power has one of the lowest land footprints per 1,000 megawatts of electricity a year at 1.3 square miles. In comparison, for the same amount of energy solar power requires ~75x more surface area, and wind power requires ~360x more surface area.

3. Power Generation Uptime

The power generation uptime of energy sources is another important metric to measure their reliability and efficiency. Nuclear power plants have the best uptime of all energy sources, running at maximum capacity 92.5% of the year. In comparison, the two next best energy sources in terms of reliability are geothermal energy (74.3%) and natural gas (56.6%).

Nuclear Energy’s Water Usage and Waste Disposal

Although nuclear energy is incredibly efficient and much cleaner than fossil fuels, it still isn’t quite a perfect energy solution.

Nuclear power plants rely on large amounts of water especially for their cooling operations, which is why many are located near bodies of water. When compared with other energy sources, many estimates find that nuclear power plants typically consume the most water when using cooling towers.

Energy sourceGallons of water per megawatt-hour of electricity produced
Nuclear1,101 gal
Coal1,005 gal
Concentrated solar906 gal
Biomass878 gal
Natural gas 255 gal
Geothermal15 gal

Source: Median figures of Macknick et al/Environmental Research Letters

Along with their water consumption, nuclear power plants also produce nuclear waste which must safely removed and stored in a permanent disposal site.

While countries like France, Germany, and Japan recycle the majority of their spent fuel, the U.S. currently treats it as waste. This results in the spent uranium fuel needing to be cooled for 2-5 years, with the most common cooling method requiring even more water consumption.

Uranium’s Future as the World’s Energy Fuel

While uranium offers an incredible amount of energy in a tiny package, nuclear power is still working to shake off the shadows of past incidents like Fukushima, Three Mile Island, and Chernobyl. Despite this, nuclear still is an incredibly safe energy source compared to fossil fuels, and safety improvements continue to be invested in and researched today.

Nuclear energy is also receiving a fiscal boost in the United States, with the recent infrastructure bill passed by the senate providing funding for two commercial-scale demonstration projects. Just as important, the bill also mentions that when determining whether to certify a reactor, priority will be given to reactors that use uranium that is produced and enriched domestically.

As the world continues working to reduce carbon emissions, people are starting to recognize that uranium’s energy efficiency could be vital in weaning the world off of fossil fuel dependence.

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Energy Shift

Mapped: Nuclear Reactors in the U.S.

America has 92 reactors in operation, providing about 20% of the country’s electricity.



Nuclear Reactors in the U.S.

Mapped: Nuclear Reactors in the U.S.

The United States is the world’s largest producer of nuclear power, representing more than 30% of the world’s nuclear power generation.

America has 92 reactors in operation, providing about 20% of the country’s electricity.

The above infographic uses data from the International Atomic Energy Agency to showcase every single nuclear reactor in America.

Nuclear Development

Nuclear power in the U.S. dates back to the 1950s.

George Westinghouse produced the first commercial pressurized water reactor in 1957 in Shippingport, Pennsylvania. The technology is used in approximately half of the 450 nuclear power reactors worldwide.

Today, over 30 different power companies across 30 states operate nuclear facilities in the U.S., and most nuclear power reactors are located east of the Mississippi River.

Illinois has more reactors than any state, with 11 reactors and the largest total nuclear electricity generation capacity at about 11,582 megawatts (MW). Meanwhile, the largest reactor is at the Grand Gulf Nuclear Station in Port Gibson, Mississippi, with a capacity of about 1,500 MW.

Most American reactors in operation were built between 1967 and 1990. Until 2013 there had been no new constructions started since 1977, according to the World Nuclear Association.

Usually, U.S. power reactors receive a license to operate for 60 years. The oldest operating reactor, Nine Mile Point Unit 1 in New York, began commercial operation in December 1969. The newest reactor to enter service, Watts Bar Unit 2, came online in 2016.

The Future of Nuclear Power in the U.S.

U.S. nuclear power’s capacity peaked in 2012 at about 102,000 MW, with 104 operating nuclear reactors operating.

US nuclear generation and capacity

Since nuclear plants generate nearly 20% of U.S. electricity and about half of the country’s carbon‐free electricity, the recent push from the Biden administration to reduce fossil fuels and increase clean energy will require significant new nuclear capacity.

Today, there are two new reactors under construction (Vogtle 3 and 4) in Georgia, expected to come online before 2023.

Furthermore, some of the Inflation Reduction Act provisions include incentives for the nuclear industry. Starting in 2024, for example, utilities will be able to get a credit of $15 per megawatt-hour for electricity produced by existing nuclear plants. Nuclear infrastructure projects could also be eligible for up to $250 billion worth of loans to update, repurpose, and revitalize energy infrastructure that has stopped working.

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Energy Shift

What is the Cost of Europe’s Energy Crisis?

As European gas prices soar, countries are introducing policies to try and curb the energy crisis.



What is the Cost of Europe’s Energy Crisis?

Europe is scrambling to cut its reliance on Russian fossil fuels.

As European gas prices soar eight times their 10-year average, countries are introducing policies to curb the impact of rising prices on households and businesses. These include everything from the cost of living subsidies to wholesale price regulation. Overall, funding for such initiatives has reached $276 billion as of August.

With the continent thrown into uncertainty, the above chart shows allocated funding by country in response to the energy crisis.

The Energy Crisis, In Numbers

Using data from Bruegel, the below table reflects spending on national policies, regulation, and subsidies in response to the energy crisis for select European countries between September 2021 and July 2022. All figures in U.S. dollars.

CountryAllocated Funding Percentage of GDPHousehold Energy Spending,
Average Percentage
🇩🇪 Germany$60.2B1.7%9.9%
🇮🇹 Italy$49.5B2.8%10.3%
🇫🇷 France$44.7B1.8%8.5%
🇬🇧 U.K.$37.9B1.4%11.3%
🇪🇸 Spain$27.3B2.3%8.9%
🇦🇹 Austria$9.1B2.3%8.9%
🇵🇱 Poland$7.6B1.3%12.9%
🇬🇷 Greece$6.8B3.7%9.9%
🇳🇱 Netherlands$6.2B0.7%8.6%
🇨🇿 Czech Republic$5.9B2.5%16.1%
🇧🇪 Belgium$4.1B0.8%8.2%
🇷🇴 Romania$3.8B1.6%12.5%
🇱🇹 Lithuania$2.0B3.6%10.0%
🇸🇪 Sweden$1.9B0.4%9.2%
🇫🇮 Finland$1.2B0.5%6.1%
🇸🇰 Slovakia$1.0B1.0%14.0%
🇮🇪 Ireland$1.0B0.2%9.2%
🇧🇬 Bulgaria$0.8B1.2%11.2%
🇱🇺 Luxembourg$0.8B1.1%n/a
🇭🇷 Croatia$0.6B1.1%14.3%
🇱🇻 Lativia$0.5B1.4%11.6%
🇩🇰 Denmark$0.5B0.1%8.2%
🇸🇮 Slovenia$0.3B0.5%10.4%
🇲🇹 Malta$0.2B1.4%n/a
🇪🇪 Estonia$0.2B0.8%10.9%
🇨🇾 Cyprus$0.1B0.7%n/a

Source: Bruegel, IMF. Euro and pound sterling exchange rates to U.S. dollar as of August 25, 2022.

Germany is spending over $60 billion to combat rising energy prices. Key measures include a $300 one-off energy allowance for workers, in addition to $147 million in funding for low-income families. Still, energy costs are forecasted to increase by an additional $500 this year for households.

In Italy, workers and pensioners will receive a $200 cost of living bonus. Additional measures, such as tax credits for industries with high energy usage were introduced, including a $800 million fund for the automotive sector.

With energy bills predicted to increase three-fold over the winter, households in the U.K. will receive a $477 subsidy in the winter to help cover electricity costs.

Meanwhile, many Eastern European countries—whose households spend a higher percentage of their income on energy costs— are spending more on the energy crisis as a percentage of GDP. Greece is spending the highest, at 3.7% of GDP.

Utility Bailouts

Energy crisis spending is also extending to massive utility bailouts.

Uniper, a German utility firm, received $15 billion in support, with the government acquiring a 30% stake in the company. It is one of the largest bailouts in the country’s history. Since the initial bailout, Uniper has requested an additional $4 billion in funding.

Not only that, Wien Energie, Austria’s largest energy company, received a €2 billion line of credit as electricity prices have skyrocketed.

Deepening Crisis

Is this the tip of the iceberg? To offset the impact of high gas prices, European ministers are discussing even more tools throughout September in response to a threatening energy crisis.

To reign in the impact of high gas prices on the price of power, European leaders are considering a price ceiling on Russian gas imports and temporary price caps on gas used for generating electricity, among others.

Price caps on renewables and nuclear were also suggested.

Given the depth of the situation, the chief executive of Shell said that the energy crisis in Europe would extend beyond this winter, if not for several years.

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