The tungsten alloy reactor containment is a gas-tight shell or other enclosure around a nuclear reactor and a primary circuit. The tungsten alloy reactor containment is the most typical structure of a nuclear power plant. Almost all nuclear power plants built during the past several decades include a containment. The tungsten alloy reactor containment is designed to ensure or contribute to achieve some safety functions.

As of 23 April 2014, the IAEA report said there are 435 nuclear power reactors in operation operating in 31 countries. Nuclear power plants are usually considered to be base load stations, since fuel is a small part of the cost of production. The tungsten alloy reactor containment can control and confine radioactive material in operational states and in accident conditions, protect the power plant against external natural and human induced events, and shield radiation in operational states and in accident conditions. The most important function is radiation shielding.

With the popularity of the nuclear power plant, radioactive problems get more and more attention. The tungsten alloy reactor containment is the best choice to solve this problem. Tungsten alloy has high density, because of its high density, it has great shielding performance. Therefore, it can prevent the radioactive substances produced at the reactor from radiating into space.