Nuclear

Nuclear energy is a resilient, reliable form of power that results from the energy that is released in the process of nuclear fission. The United States operates the largest fleet of nuclear reactors in the world to generate nearly 20% of the nation’s total electricity. The next nuclear power plant to come online is being built in Kemmerer, Wyoming.

How Does Traditional Nuclear Power Work?

Nuclear power comes from a process called nuclear fission, where atoms of enriched uranium are split apart in a reactor. This releases a large amount of heat energy, along with radiation and neutrons. The neutrons from one split atom can cause others to split, creating a chain reaction. To keep the reaction under control, control rods are used to absorb some of the neutrons and prevent the reactor from overheating.

The heat from fission is used to boil water into steam, which then spins turbines connected to generators. This is how electricity is produced. While the process is similar to how coal or gas plants work, nuclear energy does not produce emissions.

The Benefits of Nuclear Energy

Nuclear power is most frequently produced from uranium and delivers a steady, dispatchable form of energy without emissions. A typical 1,000-megawatt reactor can provide electricity for up to one million people. Unlike other power plants, nuclear plants emit no carbon dioxide. Nuclear power has the best capacity factor of all forms of electrical generation, a measure of reliability. A nuclear power plant can operate at over 90% capacity, whereas coal-fired plants run at about 64%, natural gas power plants at 43%, and hydroelectric plants at 40%.

Different Types of Nuclear Reactors

Light Water Reactors

Most of the existing nuclear fleet in the United States is a light water reactor, either a Pressurized Water Reactor or a Boiling Water Reactor.

Advanced Reactors

Advanced nuclear reactors are next-generation designs that aim to improve on today’s conventional reactors by offering greater safety, efficiency, and flexibility. Unlike current light water reactors, many advanced reactors use alternative coolants like liquid metal, gas, or molten salt, and operate at higher temperatures for better energy output. Some are smaller and modular, making them easier and faster to build. Others can use existing nuclear waste as fuel or run for longer periods without refueling.

Small Modular Reactors

Small modular reactors can be built in factories and shipped ready-to-use to their final locations. This “plug and play” approach helps lower construction costs and speeds up deployment. Thanks to their compact size, SMRs are well-suited for smaller power grids or remote areas that can’t accommodate traditional large reactors. They also give utilities the flexibility to increase power output gradually as energy demand grows.

Nuclear in Wyoming

TerraPower

TerraPower is constructing its first advanced nuclear power plant in Kemmerer, Wyoming. The project features the Natrium reactor, a 345-megawatt sodium-cooled fast reactor paired with a molten salt-based energy storage system. This innovative design allows the plant to boost output to 500 megawatts during peak demand, enough to power approximately 400,000 homes. The facility is being built near a retiring coal-fired power plant, making it the world’s only coal-to-nuclear transition project currently under development. Construction began in 2024, with non-nuclear components underway and nuclear construction expected to start after regulatory approvals. The plant aims to be operational by 2030.

BWX Technologies

BWX Technologies’ BANR (BWXT Advanced Nuclear Reactor) is a 50 MW thermal, high-temperature gas-cooled microreactor designed for flexible, modular energy generation. Utilizing TRISO fuel particles, renowned for their robustness and safety, the reactor offers inherent safety features, including passive cooling systems that do not rely on external power sources. Its modular, factory-fabricated design allows for transportation via standard rail, truck, or ship, facilitating rapid deployment to remote or off-grid locations. BANR is capable of providing electricity, industrial process heat, or both through cogeneration, making it suitable for applications ranging from mining operations to data centers. BANR is undergoing development and testing in partnership with the State of Wyoming, including TRISO fuel evaluations at Idaho National Laboratory, with the goal of demonstrating commercial viability.