Occupational Intakes of Radionuclides Part 1 - ICRP

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DRAFT REPORT FOR CONSULTATION
Dose Per Unit Intake (DPUI). See also Dose Coefficient
In this report series: The committed effective dose per unit radionuclide
intake, e(50), or committed tissue equivalent dose to the tissue or organ rT per
unit radionuclide intake, hT(rT,50), where the dose-commitment period over
which the dose is calculated is 50 years.
Dose–response function (DRF)
A particular function used in this publication to represent the absorbed dose in
a target region per particle fluence in that region, derived using models of the
microscopic structure of the target region geometry and the transport of the
secondary ionising radiations in those regions.
Effective Dose, E
In this report series, in accordance with the generic definition of effective dose
in ICRP Publication 103 (ICRP, 2006), the effective dose is calculated as:
E
Male
Female
H(
r
T ) H(
rT
)
wT
2
T
where H(rT) Male and H(rT) Female are the equivalent doses to the tissue or organs
rT of the Reference Adult Male and Reference Adult Female respectively, and
wT is the tissue weighting factor for tissue rT , with w 1.
The sum is
performed over all organs and tissues of the human body considered to be
sensitive to the induction of stochastic effects. Since wR and wT are
dimensionless, the unit for the effective dose is the same as for absorbed dose,
J kg -1 , and its special name is sievert (Sv).
Equivalent Dose (H(rT))
In this report series: The equivalent dose is defined as:
H
r w D r
T
R
R
R
T
where wR is the radiation weighting factor for radiation type R, and DR(rT) is
the organ dose from radiation type R to in a tissue or organ rT of the Reference
Adult Male or Reference Adult Female.. Since wR is dimensionless, the unit
for the equivalent dose is the same as for absorbed dose, J kg -1 , and its special
name is sievert (Sv).
Exposure
The state or condition of being subject to irradiation.
• External Exposure: exposure to radiation from a source outside the body.
• Internal Exposure: exposure to radiation from a source within the body.
Gray (Gy)
The special name for the SI unit of absorbed dose: 1 Gy = 1 J kg -1 .
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T
T