Occupational Intakes of Radionuclides Part 1 - ICRP

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DRAFT REPORT FOR CONSULTATION
of the Reference Worker of 1.2 m 3 h -1 and an annual working time of 2000 h.
Then the DAC is given by:
ALI j
DAC j
2400
Dose Coefficient
Committed tissue equivalent dose per unit intake at age to, hT(τ), or committed
effective dose per unit intake, e(τD), where τD is the dose-commitment period
in years over which the dose is calculated i.e. 50 y for adults and (70–to) y for
children. Note that elsewhere the term ‘dose per unit intake (DPUI)’ is
sometimes used for dose coefficient.
Dose constraint
A prospective and source-related restriction on the individual dose from a
source, which provides a basic level of protection for the most highly exposed
individuals from a source, and serves as an upper bound on the dose in
optimisation of protection for that source. For occupational exposures, the
dose constraint is a value of individual dose used to limit the range of options
considered in the process of optimisation (ICRP, 2007).
Dose limit
Recommended value of the effective dose or the organ- or tissue-equivalent
dose to an individual that shall not be exceeded in planned exposure situations
(ICRP, 2007).
Dose of record
In this document the dose of record refers to the effective dose, assessed by
summing the measured personal dose equivalent HP(10) and the committed
effective dose retrospectively determined for the Reference Worker using
results of individual monitoring of the worker and ICRP reference biokinetic
and dosimetric computational models. Dose of record may be assessed using
site-specific parameters of exposure such as the absorption Type of the
material and the AMAD/AMTD of the inhaled aerosol, but the parameters of
the Reference Worker shall be fixed as defined by the ICRP in this report
series. Dose of record is assigned to the worker and required to be kept for
purposes of reporting and retrospective demonstration of compliance with
regulatory requirements.
Dose Per Unit Content (DPUC)
In this report series: A set of tabulated values z(t)=e(50)/m(t)
zhT(t)=hT(50)/m(t), where e(50) is DPUI and z(t) is the bioassay function.
DPUC represent the committed effective dose or committed equivalent dose
in an organ T per unit predicted activity content in the body, a given organ
(organ T or other organ) or per unit daily excretion.
10