A Pebble Bed Reactor is a type of nuclear reactor that uses spherical fuel elements, known as pebbles, which are made of a mixture of uranium and graphite. These pebbles are designed to withstand high temperatures and provide efficient heat transfer. The reactor operates at high temperatures, making it suitable for generating electricity and producing hydrogen. The design of a Pebble Bed Reactor enhances safety, as the pebbles can absorb heat and prevent overheating. Additionally, the reactor's modular nature allows for scalability, meaning multiple reactors can be built to meet energy demands. This technology is part of the broader field of nuclear energy and aims to provide cleaner energy solutions.