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

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64<br />

CONSEQUENCE ANALYSIS<br />

Sr and Cs have been studied extensively, and as a result their chemical behavior can be<br />

modeled quite well in groundwater systems. The same is not true <strong>of</strong> the other nuclides.<br />

Data is also a problem. Quite simply, available data is usually insufficient to per-<br />

form this type <strong>of</strong> modeling with accuracy. What one is left with is the conservative<br />

approach. This was the approach taken for the Statement.<br />

Draft p. 1.19<br />

Issue<br />

It would be useful to provide any available risk (consequence x probability) estimates<br />

for the transportation accident being discussed. This will allow a comparison to be made<br />

with the risks for the other accident scenarios. (208-NRC)<br />

Response<br />

Accident frequencies are given in the accident description tables <strong>of</strong> Section 6,<br />

DOE/ET0028, Vol. 4, and in Section 4, DOE/ET-0029, Vol. 1. The basis for accident analysis<br />

is described in Section 3.2 <strong>of</strong> the final Statement.<br />

Draft p. 1.19<br />

Issue<br />

Several commenters did not agree with the Statement that "...the expected frequency<br />

(from a transportation accident) brings the risk to a negligible value." (62, 128)<br />

Response<br />

Risks from transportation <strong>of</strong> nuclear material, as discussed in this report, are low<br />

compared to other societal activities. See Sections 3.4 and 4.8 <strong>of</strong> the final Statement.<br />

Draft p. 1.19<br />

Issue<br />

The Statement says transportation risks are the same for all options. However, esti-<br />

mates <strong>of</strong> risk in the tables in the supporting documents do not seem to support this<br />

conclusion. (208-NRC)<br />

Response<br />

The text states that the differences in transportation risks are small for all options.<br />

A review <strong>of</strong> these risks indicates that the risks themselves are small. Therefore any dif-<br />

ference would also be small or insignificant. See DOE/ET-0029, Section 4 for analysis <strong>of</strong><br />

risks from transportation.

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