EDA II Desifgn Concept. As described in the License Application Design Selection Report, the recommended waste package design is Engineering Design Alternative II (CRWMS M&O 1999). This design includes a double-wall waste package (WP) underneath a protective drip shield (DS). A schematic representation of the WP is shown in Figure 1. The waste package outer barrier (WPOB) is to be made of Alloy 22 (UNS N06022), which the underlying structural support is to be made of 316NG or 316L (UNSS31603)(Treseder et al. 1991). Alloy 22 is a high-performance nickel-based alloy with substantial amounts of chromium (21
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