Yucca Mountain Site Characterization Project Performance Based Q List

In mid-1992, the Yucca Mountain Site Characterization Project (YMP) initiated a performance based 'Q' List development effort. This effort is intended to evolve a 'Q' List based upon the quantitative technical characteristics of the engineered and natural features of the prospective Mined Geologic Disposal System (MGDS). The resulting 'Q' List determinations will replace the existing list which was formulated on a very conservative basis because of the conceptual nature of the initial MGDS designs. The evolved, performance based 'Q' List will enable the selection of the optimum set of controls to be employed during execution of activities associated with natural and engineered items comprising the MGDS.