report; the maximum permissible lung burden (MFLB) and the
maximum permissible concentration in air ({MPC,).
The MPLB
is the total amount of a given radionuclide in the lung of
an average size man that will result in the lung being
irradiated at the maximuin permissible lung dose (MPLD).
py
The MPC, is the concentration in air that will result in
an average adult male obtaining a MPLB and hence a MPLD by
breathing the air.
.
:
7
It is important to recognize that the MPLD is the
°F
primary stan@ard; it applies to all radionuclides and
radiation sources.
The MPLB and the MPCa are derived standards
and are specific for a radionuclide.
These derived standards
are related to the biological properties of a radionuclide
and to the form of radiation it emits.
|
Table I lists the existing exposure standards for em~
—_
.
ployees of the nuclear industry that apply to Pu-239 in insoluble
form.
The MPLD of 15 rem/yr is included in the recommendations
of the Intcrnational Commission on Radiological Protection
-(icrp) 2 the National Council on Radiation Protection and
Measurements
8/
(NCRP)?, and the Federal Radiation Council
ICRP Publication 9, Recommendations of the International
Commission on Radioloaical Protection
Pergamon Press,
o/
New York,
1966,
p.
(Accented Seoterber 17,
14.
NCRP R epert No. 39, Basic Radiation Prot
NCRP PuLli cations,
Washington,
9.
¢.,
Jan.
15,
i
1s
19%.