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Glossary cont'd - doe-std-1128-98_ch10285
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DOE Standard Guide of Good Practices for Occupational Radiological Protection In Plutonium Facilities
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Appendix B Plutonium in Department of Energy Facilities - doe-std-1128-98_ch10287


DOE-STD-1128-98
TRU: Transuranic (TRU) waste refers to waste materials containing elements with atomic
numbers greater than 92. These elements are generally alpha-emitting radionuclides that decay
slowly. The TRU waste contains a concentration of these elements greater than 100 nCi/g. The
TRU waste is not as intensely radioactive as HLW. The TRU waste also decays slowly, requiring
long-term isolation. (DOE/S-0101)
very high radiation area: Any area accessible to individuals in which radiation levels could
result in an individual receiving an absorbed dose in excess of 500 rad (5 gray) in 1 hour at 1
meter from a radiation source or from any surface that the radiation penetrates. (10 CFR 835)
workplace monitoring: The measurement of radioactive material and/or direct radiation levels in
areas that could be routinely occupied by workers.
A-6


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