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Page Title: Appendix A: Glossary - Continued
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DOE-STD-1128-98
Guide of Good Practices for Occupational Radiological Protection in Plutonium Facilities
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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