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residual radioactivity

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Nuclear radiation that results from radioactive sources and persists for longer than one minute. Sources of residual radioactivity created by nuclear explosions include fission fragments and radioactive matter created primarily by neutron activation, but may also be created by gamma and other radiation activation. Other possible sources of residual radioactivity include radioactive material created and dispersed by means other than nuclear explosion. See also contamination; induced radiation; initial radiation.


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For lot III (24-hr experiment) urine and feces were also collected and metabolic cages were washed with 100 mL ethanol from which aliquots were taken for residual radioactivity determination.
The NRC has recently undertaken a process to revise residual radioactivity requirements which will determine the level of cleanup necessary for terminating a license.
McClure added, "The preliminary test results also showed that gold jewelry would not retain any residual radioactivity from the irradiation process.
 
 
 
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