There are a number of key international treaties and bodies designed to address issues associated with nuclear weapons. The most important being the UN treaty on the prohibition of nuclear weapons.
There are a number of other treaties intending to create nuclear weapons free zones, comprehensively ban nuclear weapons testing, and stop the spread of nuclear weapons. There are others still in development or discussion, such as the Fissile Materials Cut Off Treaty (FMCT) and the Nuclear Weapons Convention.
The International Atomic Energy Agency (IAEA) is the key body set up in 1957 to promote nuclear technologies. Answering to the United Nations annually, there are three main areas of work underpinning the IAEA´s mission: Safety and Security; Science and Technology; and Safeguards and Verification.
Each of these treaties is discussed in more detail – use the links in the main menu on left.