Nuclear Non-Proliferation Treaty in the context of "RDS-1"

Nuclear material refers to the elements uranium, plutonium, and thorium, in any form, according to the IAEA. This is differentiated further into "source material", consisting of natural and depleted uranium, and "special fissionable material", consisting of enriched uranium (U-235), uranium-233, and plutonium-239. Uranium ore concentrates are considered to be a "source material", although these are not subject to safeguards under the Nuclear Non-Proliferation Treaty.

According to the Nuclear Regulatory Commission (NRC), there are four different types of regulated nuclear materials: special nuclear material, source material, byproduct material and radium. Special nuclear materials have plutonium, uranium-233 or uranium with U or U that has a content found more than in nature. Source material is thorium or uranium that has a U content equal to or less than what is in nature. Byproduct material is radioactive material that is not source or special nuclear material. It can be an isotope produced by a nuclear reactor, the tailings and waste that is produced or extracted from uranium or thorium from an ore that processed mainly for its source material content. Byproduct material can also be discrete sources of radium-226 or discrete sources of accelerator-produced isotopes or naturally occurring isotopes that pose a threat greater or equal to a discrete source of radium-226. Radium is also a regulated nuclear material that is found in nature and produced by the radioactive decay of uranium. The half-life of radium is approximately 1,600 years.

The Campaign for Nuclear Disarmament (CND) is an organisation that advocates unilateral nuclear disarmament by the United Kingdom, international nuclear disarmament and tighter international arms regulation through agreements such as the Nuclear Non-Proliferation Treaty. It opposes military action that may result in the use of nuclear, chemical or biological weapons, and the building of nuclear power stations in the UK.

CND began in November 1957 when a committee was formed, including Canon John Collins as chairman, Bertrand Russell as president and Peggy Duff as organising secretary. The committee organised CND's first public meeting at Methodist Central Hall, Westminster, on 17 February 1958. Since then, CND has periodically been at the forefront of the peace movement in the UK. It claims to be Europe's largest single-issue peace campaign. Between 1958 and 1965 it organised the Aldermaston March, which was held over the Easter weekend from the Atomic Weapons Establishment near Aldermaston to Trafalgar Square, London.