Irreversible nuclear disarmament through geological disposal of plutonium

Monday, February 29, 2016
11:30 AM - 1:00 PM
(Pacific)
William J. Perry Conference Room
Encina Hall, Second Floor, Central, C231
616 Jane Stanford Way, Stanford, CA 94305

Abstract: The large U.S. and Russian stockpiles of weapons plutonium present a sustained risk to global nuclear security. Under a reciprocal disarmament agreement, both nations are obliged to irreversibly dispose of 34 metric tonnes of this material. The current terms of the agreement call for the conversion of plutonium into commercial nuclear fuel and irradiation in civilian reactors, rendering it unattractive for weapons use. Rapid and consistent increase in the projected cost of this approach has rendered it infeasible for the U.S. Proposed alternatives involve underground immobilization of the plutonium in a stable geological formation, yet there exist substantial obstacles to this strategy. There is uncertainty in the ability of a geological repository to safely contain such material for the tens of thousands of years during which it remains a threat to public health. Russia has argued that geological disposal does not represent irreversible disarmament, as the material might be retrieved at a later time. This talk will present an analysis of the political and technical constraints on the geological disposal of weapons plutonium, along with potential paths forward.

 

About the Speaker: Cameron Tracy is a MacArthur Nuclear Security Postdoctoral Fellow at CISAC for 2015-2016. He also holds a postdoctoral appointment in the Department of Geological Sciences in the Stanford School of Earth, Energy & Environmental Sciences.

Cameron’s research at CISAC involves the assessment of strategies for the disposal of fissile materials recovered from dismantled nuclear weapons and analysis of their implications for international arms reduction treaty compliance. He also investigates the structural and chemical behavior of materials, including nuclear fuels and wasteforms, in extreme environments.

Cameron received his Ph.D in Materials Science and Engineering from the University of Michigan in 2015. He holds a M.S. from the University of Michigan and a B.S. from the University of California, Davis. In 2009-2010 he worked as a research assistant at Los Alamos National Laboratory.