Protective suit manufacture. Technician checking gas levels in a Mururoa radiation protection suit. It is cooled by a flow of gas, which helps to prevent workers in nuclear power plants from overheating as they work. In this test, a mannequin has been placed in the suit, which simulates the effects of human breathing on the gas levels in the suit. It is important to ensure that oxygen and carbon dioxide levels remain constant at normal levels. The Mururoa suit is manufactured by Delta Protection.