Development of the Performance Confirmation Program at Yucca Mountain, Nevada Page: 4 of 12
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In summary, the PC program must:
* Confirm that subsurface conditions, geotechnical and design parameters are as anticipated and that changes to these
parameters are within limits assumed in the License Application,
* Confirm that the waste retrieval option is preserved,
* Evaluate information used to assess whether natural and engineered barriers function as intended,
" Evaluate effectiveness of design features intended to perform a postclosure function during repository operation
* Monitor waste package condition.
The PC program began during site characterization and will continue until permanent closure of the repository
(10 CFR 63.131(b)). Relevant site characterization information is incorporated into the baseline for implementation of PC
during repository construction and operation. A variety of testing and monitoring is anticipated as part of repository
development and operation. Although the primary focus of the PC program is on postclosure performance of the repository,
the PC program also includes activities to address the preservation of the ability to retrieve waste, however, operational and
administrative controls of processes like materials qualification, waste acceptance, waste package testing and handling are not
included in the PC program.
RISK-INFORMED PERFORMANCE-BASED DECISION ANALYSIS AND PORTFOLIO DEVELOPMENT
As stated in the Introduction, the evaluation of the potential PC activities for possible inclusion in the PC program used a
risk-informed performance-based decision analysis. The term risk-informed refers to an evaluation of the probability of an
event multiplied by the consequences of that event, and performance-based refers to the license application performance
assessment analysis. The decision analysis approach: 1) accounts for the fact that there are multiple and potentially
Page 4 of 12
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LeCain, G.D.; Barr, D.; Weaver, D.; Snell, R.; Goodin, S.W. & Hansen, F.D. Development of the Performance Confirmation Program at Yucca Mountain, Nevada, report, March 17, 2006; Las Vegas, Nevada. (https://digital.library.unt.edu/ark:/67531/metadc886713/m1/4/: accessed March 25, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.