release to uncontrolled areas: Release of material from administrative control after confirming that the residual
radioactive material meets the guidelines in DOE 5400.5.
rem: Unit of dose equivalent. Dose equivalent in rem is numerically equal to the absorbed dose in rad multiplied by a
quality factor, distribution factor and any other necessary modifying factor (1 rem = 0.01 sievert).
removable contamination: Radioactive material that can be removed from surfaces by non-destructive means, such as
casual contact, wiping, brushing, or washing.
respiratory protective device: An apparatus, such as a respirator, worn by an individual for the purpose of reducing
the individual's intake of airborne radioactive materials [see 835.2(a)].
sealed radioactive source: A radioactive source manufactured, obtained, or retained for the purpose of utilizing the
emitted radiation. The sealed radioactive source consists of a known or estimated quantity of radioactive material
contained within a sealed capsule, sealed between layer(s) of non-radioactive material, or firmly fixed to a non-
radioactive surface by electroplating or other means intended to prevent leakage or escape of the radioactive material.
Sealed radioactive sources do not include reactor fuel elements, nuclear explosive devices, and radioisotope
thermoelectric generators [see 835.2(a)].
senior site executive: That person at a DOE contractor-operated facility or site who has final on-site corporate authority
and is often called the President, General Manager, Site Manager, or Director.
sievert (Sv): SI unit of any of the quantities expressed as dose equivalent. The dose equivalent in sieverts is equal to the
absorbed dose in grays multiplied by the quality factor (1 Sv = 100 rems).
site: An area managed by DOE where access can be limited for any reason. The site boundary encompasses controlled
soil contamination area: An area in which soil contamination is present at levels that are not releasable in accordance
with DOE's environmental protection standards.
source leak test: A test to determine if a sealed radioactive source is leaking radioactive material [see 835.2(a)].
standard radiological warning trefoil: Symbol designed and proportioned as illustrated in ANSI N2.1.
step-off pad: Transition area between contaminated and non-contaminated areas that is used to allow exit of personnel
and removal of equipment.
sticky pad: Step-off pad provided with a tacky surface to reduce the potential for inadvertently tracking contamination
out of a contaminated area.
survey: An evaluation of the radiological conditions and potential hazards incident to the production, use, transfer,
release, disposal, or presence of radioactive material or other sources of radiation. When appropriate, such an evaluation
includes a physical survey of the location of radioactive material and measurements or calculations of levels of radiation,
or concentrations or quantities of radioactive material present].
technical work document: A term used to generically identify formally approved documents that direct work, such as
procedures, work packages, or job or research plans.