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

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Response<br />

118<br />

DOSE CALCULATIONS<br />

In preparing the final Statement, the feasibility <strong>of</strong> expanding population and time<br />

parameters in dose calculations was examined and found to have no appreciable effect on the<br />

conclusions.<br />

Draft pp. 3.1.142-144<br />

Issue<br />

There seems to be inconsistency in the values given in Tables 3.1.30 to 3.1.32. Com-<br />

paring Tables 3.1.30 and 3.1.31 for 100, 100,000, and one million years the 70-yr doses are<br />

just about 70 times the first year doses. At 2050, however, they are 250 to 750 times the<br />

first-year doses. Comparing Tables 3.1.31 and 3.1.32, in order to obtain the regional popu-<br />

lation doses in Table 3.1.32 from the maximum-individual doses given in Table 3.1.31 at the<br />

year 1050 it requires from 10 to 27 persons, which simply is not reasonable. The 1,000 year<br />

values require from 40,000 to 60,000 persons--much more reasonable. At 100,000 years the<br />

values range from 600 to 5,000--much too much variation and too low; at one million years<br />

the range is 500 to 17,000 persons, again too large a range and too low. (154)<br />

Response<br />

Draft Tables 3.1.30 to 3.1.32 were checked for errors and consistency. The significant<br />

pathway to man changes with time and as a consequence ratios between maximum-individual dose<br />

and per-capita dose are not constant.<br />

Draft p. 3.1.150<br />

Issue<br />

Doses to a maximum individual are not the best measure <strong>of</strong> the impact <strong>of</strong> this accident.<br />

Total population dose and integrated population dose are most significant. The emergency<br />

dose limits <strong>of</strong> 100 rem and 25 rem apply implicitly to the case where only one or a few peo-<br />

ple are exposed. (113-EPA)<br />

Response<br />

Dose to the maximum individual is one measure <strong>of</strong> impact, the population dose another;<br />

both were presented. Reference to emergency dose limits was provided for perspective only<br />

to the maximum individual.

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