TABLE
If
Existing Exposure Guidelines for Non-Occupational Exposure
that Apply to Pu-239
in Insolubie Form*
Individual
MPLD
1.5
(ICRP,
NCRP;
(0.5)
Population Averade.
rem/yr
0.5
MPLB
0.0016
MPC.
10742 (3x10713) uci/ml
(ICRP, AEC)
*
(0.17)
rem/yr
FRC)
(0.0005) uci
0.0005
(0.00017)
uCi
3x1074% (10743) uci/ml
The MPLD values in parentheses refer to the latest
recommendations of the NCRP.
The MPLS and MPCs values in
parentheses correspond to the new NCRP dose recommendations.
— ow
Iv.
Calculating the Dose Due to Insoluble Alpha-Emitters
The purpose of this section is to examine the assumptions
in’ the radiation standards above that are inappropriate when
applied to insoluble alpha-emitting particulates such as
aerosols of Pu03.
The assumptions are introduced through a
review of basic definitions of radiation dose and the factors
used to calculate the dose.
A
The Dose Equivalent
When an X-ray or the radiation emitted by a radionuclide
passes through tissue it transfers energy to the cells in
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