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

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Draft p. K.8<br />

Issue<br />

185<br />

WASTE MANAGEMENT OPERATIONS<br />

Figure K.6 shows a smaller temperature increase after emplacement <strong>of</strong> waste for a<br />

repository in shale (Figure K.6, p. K.8) than for a repository in salt. (208-NRC)<br />

Response<br />

Figure K.6 in the draft Statement was incorrect. The final Statement contains a<br />

revised figure.<br />

DOE/ET-0028, pp. 7.1.2 and 7.2.18<br />

Issue<br />

The GEIS should discuss whether retrievability in salt can be guaranteed under the<br />

expected thermal loadings. It should also discuss whether the integrity <strong>of</strong> seals in the<br />

salt repository can be maintained following closure. (208-NRC)<br />

Response<br />

As discussed in Appendix K <strong>of</strong> the final Statement, analyses indicate that wastes will<br />

remain readily retrievable for at least the initial 5 year period.<br />

Details <strong>of</strong> shaft sealing techniques are highly site dependent and are not discussed in<br />

the final Statement. Discussion <strong>of</strong> shaft sealing techniques is provided in NUREG/CR-0495<br />

(NRC 1979b).<br />

DOE/ET-0028, p. 7.3.5<br />

Issue<br />

Emplacement <strong>of</strong> waste containers without the sleeves does not appear to be considered<br />

in the thermal analysis. (208-NRC)<br />

Response<br />

The thermal analysis considers the use <strong>of</strong> sleeves with an associated air gap sur-<br />

rounding the canister. This maximizes the temperature <strong>of</strong> the waste canister and was<br />

conservatively used to represent the thermal conditions <strong>of</strong> canisters without sleeves also.

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