31. Last month, Washington and Moscow announced formation of a joint task force to study securing radioactive sources in Russia. 32. According to some reports, looters have stolen or removed low-enriched uranium and other radioactive sources stored under seal there. 33. This relationship is affected by the type of radiation being emitted and the physical nature of the radioactive source . 34. Using actinides in nuclear fuel, sealed radioactive sources or advanced materials such as self-glowing crystals has many potential benefits. 35. Steel mills often use RPMs to screen incoming scrap metal to avoid radioactive sources illegally disposed in this way. 36. Vallecitos also fabricates radioactive source materials used in medicine and industry, under a license issued by the State of California. 37. He also said the radioactive sources could have been mixed with conventional explosives to make a " dirty bomb ." 38. Disused radioactive sources _ from the military, industry and medical facilities _ are believed scattered across the former Soviet Union. 39. Use of chemically unstable forms of actinides in MOX and sealed radioactive sources is not appropriate by modern safety standards. 40. The United States alone has an estimated 2 million licensed radioactive sources , thousands of them high-risk materials, the CNS reports.
