Ed Lyman

Senior scientist

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Dr. Lyman received his PhD in physics from Cornell University in 1992. He was a postdoctoral research scientist at Princeton University's Center for Energy and Environmental Studies, and then served as Scientific Director and President of the Nuclear Control Institute. He joined UCS in 2003. He is an active member of the Institute of Nuclear Materials Management and has served on expert panels of the Nuclear Regulatory Commission. His research focuses on security issues associated with the management of nuclear materials and the operation of nuclear power plants, particularly with respect to reprocessing and civil plutonium. Areas of expertise: Nuclear terrorism, proliferation risks of nuclear power, nuclear weapons policy

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Ed's Latest Posts

Increase in Cancer Risk for Japanese Workers Accidentally Exposed to Plutonium

According to news reports, five workers were accidentally exposed to high levels of radiation at the Oarai nuclear research and development center in Tokai-mura, Japan on June 6th. The Japan Atomic Energy Agency, the operator of the facility, reported that five workers inhaled plutonium and americium that was released from a storage container that the workers had opened. The radioactive materials were contained in two plastic bags, but they had apparently ripped.

We wish to express our sympathy for the victims of this accident. Read more >

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UCS in Science: The NRC Must Act to Reduce the Dangers of Spent Fuel Pool Fires at Nuclear Plants

In a Policy Forum article published in this week’s Science magazine, I argue, along with my co-authors Frank von Hippel and Michael Schoeppner, that the U.S. Nuclear Regulatory Commission (NRC) needs to take prompt action to reduce the alarmingly high potential for fires in spent fuel pools at U.S. nuclear plants. Read more >

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US Needs More Options than Yucca Mountain for Nuclear Waste

On Wednesday, I testified at a hearing of the Environment Subcommittee of the House Energy and Commerce Committee. The hearing focused on the discussion draft of a bill entitled “The Nuclear Waste Policy Amendments Act of 2017.” Read more >

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UCS to the NRC: Stop Dragging Your Feet on Important Nuclear Security Updates

Yesterday, UCS sent a letter to Nuclear Regulatory Commission (NRC) chairman Stephen Burns urging the NRC to quickly issue new versions of two outdated security documents that play a critical role in defining how nuclear plants can be adequately protected against terrorist attacks. Read more >

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Reflections on the IAEA Nuclear Security Conference: More Participants, Less Focus

Last week I had the opportunity to attend the conference on nuclear security in Vienna sponsored by the International Atomic Energy Agency (IAEA). The conference was enormous, with 2,000 participants from 130 countries. The US official delegation alone had over 100 people. I heard (but have not substantiated) that the ministerial meeting that preceded the technical meeting attracted a larger number of national delegations than any other IAEA conference in its history. By one measure—inclusivity—the conference seems to have been a success.

However, that success came at a price: a reduction of focus on the most serious nuclear threat—the theft of fissile materials (highly-enriched uranium (HEU) and plutonium) that terrorists could use to make improvised nuclear weapons. Read more >

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