Initial Site-Specific De-Inventory Report for Big Rock Point Report No.: RPT-3014537-002
5.0 MULTI-ATTRIBUTE UTILITY ANALYSIS As noted in Section 3.0, there are several potential routes for shipping the TS125s from the BRP ISFSI to a railcar on a Class I rail line that can take the TS125s to their penultimate or ultimate destination (e.g., a consolidated interim storage site or a repository, respectively). The diversity of these routes reflects the multiple viable approaches to shipping the TS125s (i.e., by HHT or barge), and the access of the BRP site to these modes of transport. Furthermore, these routes present multiple attributes, many with a positive connotation (e.g., safe and secure transport), and some with a negative connotation (e.g., expense), which merit an assessment approach that can evaluate these attributes in a combined manner that may distinguish one route from another and/or provide a prioritized list of routes. The MUA is a structured methodology designed to handle the trade-offs among multiple objectives (i.e., attributes). The MUA provides a transparent, rational, and defensible analysis that is easy to explain and communicate. MUA methods have been used for decades to provide logically consistent analyses of options (i.e., modes and routes) that are intended to achieve more than one objective, where no single option dominates the others on all those objectives. Utility theory is a systematic approach for quantifying an individual's or team of individuals’ ratings/preferences ( note: when “preference” is utilized together with “route” there is a specific connotation not intended to be covered in this analysis, thus “rating,” “ranking,” or “priority” will be utilized in its stead when associated with a route ). It is used to assign a numerical value on some measure of interest (e.g., metric of an attribute) and rescale it onto a normalized (0 to 1) scale with 0 representing the worst rating/option and 1 the best rating/option. This allows the direct comparison of many diverse objectives. The result is a rank-ordered evaluation of options that reflects the decision makers' preferences. The MUA has been selected as the assessment approach to evaluate the viable modes and routes (options) for moving the TS125s containing SNF and GTCC LLW from the BRP ISFSI site. In this section, an MUA using a value model, which identifies preferences of attributes, relative importance of meeting an attribute, and/or tradeoffs between attributes, will be utilized to establish a prioritized list of modes and routes from the BRP ISFSI site. 5.1 Description of MUA Applied to the BRP ISFSI MUA analysis is a straightforward concept. The three primary steps typically followed to frame the analysis are: (1) identify a set of objectives/attributes that an ‘ideal’ option will achieve; (2) define a set of performance measures (i.e., metrics) that provide a clear definition of each objective/attribute; and (3) identify or define alternative options that should be considered. Once alternative options (routes and modes), objectives (attributes), and performance measures (metrics) have been clearly defined, the preferences for the performance measures are subsequently established from a pairwise comparison between one another to establish a relative weight for each performance measure. The rating for each route per metric is established by performing another pairwise comparison between the performance measures for each route against one another. The rating of each route can then be established by using a value model to create a single metric that can be used to compare each route against one another and provide a ranking of the routes.
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Initial Site-Specific De-Inventory Report for Big Rock Point May 10, 2017
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