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Management of Commercially Generated Radioactive Waste - U.S. ...

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Response<br />

122<br />

DOSE CALCULATIONS<br />

The contribution <strong>of</strong> various pathways to total dose is dependent on the radionuclides<br />

released and varies markedly among the many release situations considered. Inclusion <strong>of</strong><br />

this information for all dose tables would lead to excessive bulk and is not practical.<br />

Draft p. D.4<br />

Issue<br />

On page D.4, the draft Statement states that the methodology used to calculate the<br />

direct radiation dose to persons along the shipping route follows that developed in<br />

WASH-1238. Subsequent to the issuance <strong>of</strong> WASH-1238, an environmental statement on transpor-<br />

tation <strong>of</strong> radioactive material has been published by the NRC. This statement is NUREG-0170,<br />

"Final Environmental Statement on the Transportation <strong>of</strong> <strong>Radioactive</strong> Material by Air and<br />

Other Modes." The latter document uses a more realistic demographic model in determining<br />

population density along the transport route and an improved method for evaluating integrals<br />

used in the model. We recommend this refined methodology be used in the GEIS in assessing<br />

the radiological impact to the population residing near the transport route. (208-NRC)<br />

Response<br />

The DOE disagrees. While the demographic model used in NUREG-O170 may be more real-<br />

istic and the method <strong>of</strong> evaluating integrals improved, the results are similar.<br />

Draft p. D.4<br />

Issue<br />

One commenter raised a question as to the accuracy required for input parameters (to<br />

dose models) derived from environmental measurements <strong>of</strong> radioactivity. (43)<br />

Response<br />

The most accurate data that is available is required and even that results in uncer-<br />

tainties <strong>of</strong> perhaps overestimation by a factor <strong>of</strong> 100 or underestimation by a factor <strong>of</strong> 10.<br />

Draft p. D.5<br />

Issue<br />

Population density assumptions used in determining the radiological consequence <strong>of</strong>.<br />

transporting radioactive wastes are given on page D.5. A value <strong>of</strong> 330 persons per square<br />

mile is used for the Eastern U.S. and California and 110 persons per square mile is used for<br />

the western U.S. The environmental aspects presented in DOE/ET-0029, page 4.1.7, use a

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