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sealed source

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sealed source
Etymology: ME, seel, mark; Fr, sourdre, to spring
a source of radioactivity that is permanently encased in a container or bonding material to prevent leakage. Sealed sources, such as seeds, needles, and specially designed applicators, are used in the implantation of cesium-137, iodine-125, iridium-192, radium-226, and other radionuclides for the treatment of various malignant tumors.


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Moreover, while CBP has systems in place to verify the legitimacy of radioactive materials licenses, it has not effectively communicated to officers at the borders when they must contact officials to verify the license for a given sealed source.
The GAO also urges a modification of the NRC's licensing process so sealed sources cannot be purchased until the intended use is verified.
Although the Air Force has permits to possess and use several small, sealed sources of radioactive material for X-rays and calibration of laboratory instruments, officials said the material from Ogden's load does not appear to be in the same form.
 
 
 
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