TEV Collision with an Emplaced 5-DHLW/DOE SNF Short Co-Disposal Waste Package

The objective of this calculation is to determine the structural response of the 5-DHLW/DOE (Defense High Level Waste/Department of Energy) SNF (Spent Nuclear Fuel) Short Co-disposal Waste Package (WP) when subjected (while in the horizontal orientation emplaced in the drift) to a collision by a loaded (with WP) Transport and Emplacement Vehicle (TEV) due to an over-run. The scope of this calculation is limited to reporting the calculation results in terms of maximum total stress intensities (SIs) in the outer corrosion barrier (OCB). The output values are reasonable for the given inputs in this calculation. Where uncertainties are not specified, they are taken into account by consistently using the most conservative approach; the
calculations, therefore, yield a bounding set of results. The results are suitable for assessment of the stresses in the waste packages. The results presented in Table 7-2 indicate that the maximum EWA SI at any point in the OCB does not exceed 0.7 times the true tensile strength of Alloy 22. The element wall averaged stress response of an emplaced 5-DHLW/DOE SNF Short Co-disposal WP due to a TEV running into it has satisfied the first condition of acceptance of the failure criterion described in Reference 2.2.28, Section 6.2.4 so no further analyses are required. Therefore, the
resulting effects of the maximum stresses in the waste package OCB due to a TEV collision event sequence is within acceptable levels and does not cause failure.