74,
White, M. G., and P. B. Dunaway, Eds.
1976. Studies of Environmental
Plutonium and Other Transuranice in Desert Ecosystems.
Nevada Applied
Ecology Group Report. NVO-159.
75.
White, M. G., and P. B. Dunaway, Eds.
1977. Nevada Applted Ecology
Group Plutonium Information Conference, Las Vegas, Nevada, February
12-13,
(In press.)
(To be published in NVO-171.)
1976.
76,
Wildung, R. E., and T. R. Garland.
1974.
"Influence of Soil Plutonium
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APPENDIX A
EQUATIONS FOR ESTIMATING ORGAN BURDEN, RADIATION DOSE,
AND DOSE COMMITMENT DUE TO INHALATION AND INGESTION
OF TRANSURANICS AT CONSTANT RATES
Definitions
e
Figure 1 is a schematic diagram of the deposition and clearance
model proposed by the Task Group on Lung Dynamics
(TGLD) of the
International Commission on Radiological Protection (ICRP){1].
@
The respiratory tract is divided into three regions:
the
nasoypharyngeal (NP), the tracheobronchial (TB), and the
pulmonary (P).
e
Radioactive dust deposited in the different regions of the
respiratory tract is cleared by various mechanisms and pathways
to the gastrointestinal tract (GIT), to the thoracic lymph nodes
(IM), or to the blood (B),
Radioactive materials entering the
GIT and LM may be transferred to B and from B to other organs of
the body,
1
e
a is the radionuclide inhalation rate (pCi/day).
:
®
a is the radionuclide ingestion rate (pCi/day).
e
Ds, D,> and D,
5
are the fractions of radioactive dust deposited
initially in the NP, TB, and P regions respectively,
e
£,
e
k=za,b,...h
e
fy is the fraction of the radionuclide entering the GIT
k
fe the fraction cleared by pathway k
which is cleared to B
690