The United States was the first country to successfully build and operate a nuclear reactor. The Chicago Pile-1, located at the University of Chicago, achieved criticality on December 2, 1942.

The Calder Hall Nuclear Power Station in the United Kingdom was the first nuclear power plant to generate electricity for a civilian grid. It began operation in 1956.

The Chernobyl Nuclear Power Plant used the RBMK reactor design, which is a type of graphite-moderated, water-cooled reactor.

The Three Mile Island accident involved the PWR-2 reactor at the Three Mile Island Nuclear Generating Station in Pennsylvania, United States.

The United States has the largest number of operating nuclear reactors, with 93 reactors as of 2023.

The Nuclear Non-Proliferation Treaty (NPT) is an international agreement that aims to prevent the spread of nuclear weapons and promote the peaceful use of nuclear energy.

The Pressurized Water Reactor (PWR) is a commonly used design in modern nuclear power plants. It uses pressurized water as both the coolant and the neutron moderator.

The Molten Salt Reactor (MSR) is a type of nuclear reactor that is being developed to use thorium as its primary fuel.

The Fast Breeder Reactor (FBR) is known for its ability to produce more fissile material than it consumes, making it a potential solution to the limited supply of uranium.

The Nautilus Reactor was used to power the first nuclear-powered submarine, the USS Nautilus.

Research reactors are specifically designed for research purposes and typically use different designs compared to power reactors.

The B Reactor at the Hanford Site in Washington, United States, was used to produce plutonium for the atomic bombs dropped on Nagasaki and Hiroshima.

The CANDU reactor design uses heavy water as a moderator and coolant, making it distinct from other reactor designs.

The Fukushima Daiichi nuclear disaster involved multiple reactors at the Fukushima Daiichi Nuclear Power Plant in Japan.

The High-Temperature Gas-Cooled Reactor (HTGR) design uses gas as a coolant, making it different from water-cooled reactors.