Appendix A: Glossary - Continued - STD-1128-98master0300

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.

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