Nuclear Issues

Matthew Bunn is a professor of practice at Harvard Kennedy School and co-principal investigator for the Belfer Center’s Project on Managing the Atom. Bunn’s research focus is on nuclear theft terrorism, nuclear proliferation, and innovation in energy technology. During the Clinton administration, Bunn served as an advisor to the White House Office of Science Technology Policy, where he played a major role in U.S. policies related to the control and disposition of weapons-usable nuclear materials in the United States and the former Soviet Union. We asked Bunn about the current crisis in U.S.-Russian relations and its impact on nuclear security.

Matthew Bunn, Will Tobey, Hui Zhang, and Nickolas Roth recently participated in a two-day roundtable discussion sponsored by the Stanley Foundation on U.S. nuclear security cooperation with Russia and China. The discussion, which involved experts from around the world, focused on overcoming challenges to nuclear security cooperation and ensuring that countries put in place effective and sustainable nuclear security measures with strong security culture.

The most significant achievement to emerge from the 2014 Nuclear Security Summit was a pledge by 35 countries to observe the terms of a joint agreement, known as Strengthening Nuclear Security Implementation. This document committed the signatories to incorporate the principles and guidelines of the International Atomic Energy Agency (IAEA) regarding nuclear security into their national laws, and to allow teams of international experts to periodically evaluate their security procedures. Promoted strongly by the chairs of all three nuclear summits—the United States, South Korea, and the Netherlands— the 2014 initiative is an important step towards creating a robust global security system designed to prevent nuclear materials from falling into the hands of terrorists.

Today, the United States and Japan announced that Japan would eliminate all the plutonium and highly-enriched uranium at its Fast Critical Assembly (FCA) at Tokai-mura.  This is a tremendous step forward for nuclear security; for terrorists, this would be some of the best material that exists in any non-nuclear-weapon state.  The material includes 331 kilograms of plutonium, most of it weapons-grade, and 214.5 kilograms of weapons-grade HEU.  (The FCA also includes over a ton of material just at the 20 percent U-235 mark that defines HEU.)   The weapons-grade HEU is enough for four simple terrorist “gun-type” bombs or a larger number of trickier-to-build implosion bombs.  The plutonium amounts to more than 40 bombs worth of material.

Rolf Mowatt-Larssen, a former director of intelligence and counterintelligence at the Department of Energy, argues that despite not falling victim to a major terrorist event in the last 10 years, the United States must not be complacent in its counter-terrorism efforts. Mowatt-Larssen said in a Belfer Center seminar in September that he believes the possibility of a major attack is higher in the next 10 years than in the preceding decade.