Proliferation Risks of Magnetic Fusion Energy

Nuclear proliferation risks from magnetic fusion energy associated with access to weapon-usable materials can be divided into three main categories: (1) clandestine production of weapon-usable material in an undeclared facility, (2) covert production of such material in a declared facility and (3) use of a declared facility in a breakout scenario, in which a state begins production of fissile material without concealing the effort.

In a recent paper published in Nuclear Fusion, A. Glaser and R. J. Goldston address each of these categories of risks from fusion. For each case, they find that the proliferation risk from fusion systems can be much lower than the equivalent risk from fission systems, if (and only if) fusion systems are designed to accommodate appropriate safeguards. At the next INMM Meeting in July 2012, Goldston and Glaser will have a follow-on paper that focuses more explicitly on some of the safeguards requirements for fusion reactors.