The Society for Risk Analysis
The Environmental Protection Agency
The United States Nuclear Regulatory Commission
North Carolina State University
Ames National Laboratory
The Uranium Institute
If identical terms were identified from multiple sources, the definition from ORO was given priority then the definition that best suited the ORO was used. Not all terms were included from each of the above www sites. Some definitions from the www sites have been altered to better suit the ORO.
The sources above involve hyperlinks that are no longer accessible.