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

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Draft pp. 3.1.160-161<br />

Issue<br />

89<br />

CONSEQUENCE ANALYSIS<br />

One commenter noted that the special parameter choices for migration length and ground<br />

water velocity would effect the calculations. When all waste is leached in one year (in the<br />

faulting scenario) the assertion that the 50-year cumulative total body dose is at most 1 to<br />

3 times occupational limits does not make sense. (40)<br />

Response<br />

The consequence analysis <strong>of</strong> groundwater transport employed a very restricted set <strong>of</strong><br />

parameters. This was not by choice but what was available to use within the time allowed.<br />

The scenario <strong>of</strong> all waste leached in one year was removed.<br />

Draft p. 3.1.161<br />

Issue<br />

The release rates used in the groundwater transport analysis in the main- body <strong>of</strong> the<br />

report jump strangely from 100%/yr to O.1%/yr. The base case should clearly be for the low<br />

rates, but results for intermediate release rates should be presented. The consequence<br />

analysis should consider solubility limits <strong>of</strong> the various radionuclides in the groundwater<br />

system under consideration; the present analysis assumes varying source terms for nuclide<br />

transport, some <strong>of</strong> which may not be physically possible. (218-001)<br />

Response<br />

The bounding condition <strong>of</strong> 100% leaching in one year was removed in the final Statement<br />

(see final Section 5.5).<br />

Draft p. 3.1.162<br />

Issue<br />

Distribution <strong>of</strong> the waste would lower the maximum and regional individual doses, but<br />

would increase the probability <strong>of</strong> the event by a factor equal to the number <strong>of</strong> repositories.<br />

(113-EPA)<br />

Response<br />

DOE is in agreement with the comment; the mathematical expectation <strong>of</strong> societal risk<br />

would remain unchanged.

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