- 42 ‘Man was performed by the NAS-MRC Advisory Committee on the
Biological Effects of Radiation.
Their report, published in
7
1972, is referred to as the BEIR Report. 3
A.
Occupational Exvosure
.
The existing occupational exposure standard for uniform
whole body irradiation is 5 rem/yr and for the lung,
15 rem/yr.
the BEIR Report estimates that exposure of the whole body
of an individual to 5 rem/yr would lead to a cancer risk
between 4.5x10°° and 2.3x1073/yr.
10 °/yr. >
oF
Their best estimate is
Their estimate of the risk of cancer to the
individual from a lung exposure of the 15 rem/yr is 3x107>/yr. 7°
Allowing a risk of cancer induction between 1/1000 and
1/10, 000 per particle, Table V presents the maximim permissible
lung particle burdens
(MPLPB)
that result in risks comparable
to these uniform radiation standards for occupational exposure.
. The MPLPB3 values in Table V represent a very substantial
‘reduct'on in the MPLB.
A hot particle of Pu-239 at the lower
limit activity contains only 0.07 pCi while the MPLB for
“occupational exposure
73/
is
1.6x10 4
Washington, D. C.
_74/
75/
Thus
the
NAS-NRC, "The Effects on Populations of Exposure to
Low Levels of Ionizing Radiation,"
74
pci.
=
Ibid, p. 91.
Ibid, p. 91.
76/ Ibid, p. 156.
, Nov. 1972.
(BEIR Report), NAS-NEC,