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Page Title: Table 6.3. Radiation Dose Limits for DOE and DOE Contractors
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DOE-STD-1128-98
Guide of Good Practices for Occupational Radiological Protection in Plutonium Facilities
accurate values of effective dose equivalent as opposed to numerically setting the value of
effective dose equivalent equal to dose equivalent.
Table 6.3. Radiation Dose Limits for DOE and DOE Contractors
Type of Radiation Exposure
Annual Limit
Occupational Exposures
5-rem total effective dose equivalent from external
Stochastic Effects
sources and the CEDE intakes received during the year
Non-Stochastic Effects
15-rem dose equivalent
Lens of eye
50-rem dose equivalent
Extremity
50-rem dose equivalent
Skin
50-rem dose equivalent
Individual organ or tissue
Embryo/fetus of a Declared Pregnant Worker
Gestation period
0.5-rem dose equivalent
Planned Special Exposure
Event plus Annual
5-rem total effective dose equivalent
Occupational exposure
0.1-rem TEDE
Minors
6.1.2 Operational Quantities
Because of the difficulties in determining effective dose equivalent from direct
measurements, the concept of operational quantities has been introduced to be more closely
related to measurable quantities. Operational quantities include ambient dose equivalent
used for area monitoring and personal dose equivalent used for personnel dosimetry.
Operational quantities are designed to be a conservative estimator of effective dose
equivalent, i.e., the values of the operational quantities will be equal to or higher than the
effective dose equivalent specified for the limiting quantities.
The ambient dose equivalent, H*(d), is the dose equivalent at a depth, d, in a 30-cm-diameter
sphere of tissue, where a) the radiation field has the same fluence and energy distribution as
the point of reference for the measurement and b) the fluence is unidirectional (i.e., the
sphere can be viewed as being in an aligned radiation field). Most survey instruments are
designed to measure ambient dose equivalent, and international standards are based on the
ambient dose equivalent concept. The depth of interest is 1 cm of soft tissue, as specified in
10 CFR 835.2.
The personal dose equivalent, Hp(d), is the dose equivalent in soft tissue at the appropriate
depth, d, below a specified point on the body. Obviously, personnel dosimeters should be
calibrated in terms of personal dose equivalent.
6-4


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