Nuclear forensics

Nuclear CSI: Noninvasive procedure could identify criminal nuclear activity

Determining if an individual has handled nuclear materials, such as uranium or plutonium, is a challenge national defense agencies currently face. The standard protocol to detect uranium exposure is through a urine sample; however, urine is able to only identify those who have been exposed recently. Now, scientists at the University of Missouri have developed procedures that will better identify individuals exposed to uranium within one year. Scientists and homeland security experts believe this noninvasive procedure could identify individuals who may be smuggling nuclear materials for criminal purposes.

"We are working to develop a tool that law enforcement agencies in nuclear proliferation or smuggling investigations can use to identify individuals who have handled special nuclear material," said John Brockman, associate professor of research in the MU Research Reactor Center. "The goal of our research was to determine if hair, fingernail clippings and toenail clippings could be used to better detect uranium exposure."

Brockman collected hair, fingernail and toenail clippings from workers in nuclear research facilities from around the country. Testing procedures developed by Brockman and his team were able to identify exposure to both natural and manmade sources of uranium.