Evaluation of temperatures for a nuclear waste repository in salt

Differences among thermal models of TEMP, HEATINGS, THAC-SIP-3D, STEALTH, and SPECTROM-41 may affect the calculation of temperatures for a nuclear waste repository in salt. These codes agree closely in the very near field and approximately in the near- and far-field regions of a nuclear waste repository. Uncertainty in the thermal conductivity of salt affects calculated temperatures much more than any uncertainties in the heat transfer models. In particular, nonsalt stratigraphy appears to affect temperatures much less than the uncertainty in the thermal conductivity of slat. Differences in geometrical representations of CHLW heat sources and sequence of emplacement have little effect on calculated temperatures