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

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Draft Appendix N<br />

Issue<br />

101<br />

CONSEQUENCE ANALYSIS<br />

Our comparison <strong>of</strong> the impacts presented in the GEIS with those in DOE/ET-0029 examined<br />

spent fuel shipment only. In converting results from one document to another, several<br />

errors have apparently been made. The remaining transportation sections in Appendix N<br />

should be similarly reviewed for errors. (208-NRC)<br />

Response<br />

Errors in impacts presented in Appendix N were found. These errors were corrected for<br />

the final Statement.<br />

Draft Appendix N<br />

Issue<br />

Throughout Appendix N, the total body radiation dose.from the routine transport <strong>of</strong><br />

radioactive materials is given in various tables. These tables show the dose to the popula-<br />

tion residing along the transport route and to members <strong>of</strong> the transport work force. The<br />

tables omit the dose to occupants <strong>of</strong> vehicles using the same route in the case <strong>of</strong> truck<br />

transport. It is not clear whether the dose that results from a delay in transit <strong>of</strong> the<br />

radioactive shipment has been included. These delays could occur from a traffic jam or a<br />

stop at a truck stop in the case <strong>of</strong> truck transport. For rail transport, a delay can be<br />

caused by adverse track conditions <strong>of</strong> a mechanical breakdown. (208-NRC)<br />

Response<br />

Vehicle occupant doses are given in each appropriate section <strong>of</strong> DOE/ET-0029. Transit<br />

delays are accounted for in the assumed average velocity <strong>of</strong> each shipment. Doses in man-<br />

rem are unchanged if the vehicle moves in spurts or continuously as long as the total travel<br />

time is unchanged.<br />

Draft p. N.4<br />

Issue<br />

The transportation accident consequences presented on p. N.4 <strong>of</strong> the GEIS are based on<br />

accident number 6.2.8 described in Table 6.2.6 <strong>of</strong> DOE/ET-0028. Releases <strong>of</strong> cesium are based<br />

on vaporization mechanisms as reported in Supplement II to WASH-1238. A study conducted by<br />

Battelle's Pacific Northwest Laboratory, "An Assessment <strong>of</strong> the Risk <strong>of</strong> Transporting Spent<br />

Nuclear Fuel by Truck," PNL-2588 indicates that other mechanisms can cause additional<br />

releases <strong>of</strong> cesium and other isotopes. These mechanisms involve either oxidation or leach-<br />

ing <strong>of</strong> the fuel. Releases <strong>of</strong> radioactive material resulting from these mechanisms can occur

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