Ensuring the Security of Radioactive Sources: National and Global Responsibilities
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For most of human existence, people were unaware of the powerful nuclear forces deep inside atoms, although they were exposed to natural background radiation derived from these forces. Not until the end of the 19th century did the first “nuclear scientists,” notably Henri Becquerel and Marie and Pierre Curie, discover energetic rays emanating from certain types of atoms due to these forces. Because of its relative natural abundance and its powerful radiation, radium became a workhorse radioactive substance for the first half of the 20th century.
In this report, FAS President Charles Ferguson examines the national and international efforts to control and secure radioactive materials. He provides background on the basic principles of the science of ionizing radiation and radioactive materials; a risk assessment of the safety and security of these materials; a discussion of various pathways for malicious use of commercial radioactive sources; and an analysis of the many efforts underway to reduce the risk of radiological terrorism with recommendations for the inclusion of this issue at the 2012 Seoul Nuclear Security Summit (“Seoul Summit”) and beyond.
A full PDF version of the report can be found here.
The SIPRI chapter describes the nuclear weapon modernization programs underway in each nuclear-armed state and provides estimates for how many nuclear warheads each country possesses.
FAS researchers Hans Kristensen and Matt Korda with the Nuclear Information Project write in the new SIPRI Yearbook 2024, released today.
The total number of U.S. nuclear warheads are now estimated to include 1,770 deployed warheads, 1,938 reserved for operational forces. An additional 1,336 retired warheads are awaiting dismantlement, for a total inventory of 5,044 warheads.
A military depot in central Belarus has recently been upgraded with additional security perimeters and an access point that indicate it could be intended for housing Russian nuclear warheads for Belarus’ Russia-supplied Iskander missile launchers.