Is Three-dimensional (3D) Printing a Nuclear Proliferation Tool?

Three-dimensional (3D) printing is an evolving technology that can produce objects from plastics and metals. It works by building up layers of material hardened by a laser. Popular press and more serious analysts have speculated that a complete nuclear weapon or gas centrifuge could be built using a 3D printer, detailed and accurate computer drawings, and appropriate materials. However, very specialized starting materials such as plutonium powder or high explosives would be required and are not readily available. In fact, there are many barriers to successfully manufacturing a complete nuclear weapon and in most cases 3D printing gives no advantage to a non-state proliferator, or even a state, trying to clandestinely build a weapon. This paper examines the technical limitations of the technology and makes suggestions for how European export regimes can build up and maintain an awareness of cases where it could enable the bypassing of nuclear proliferation barriers.

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