part_subject: "PUBLIC HEALTH AND ENVIRONMENTAL RADIATION PROTECTION STANDARDS FOR YUCCA MOUNTAIN, NEVADA"
subpart_code: "B"
subpart_subject: "Public Health and Environmental Standards for Disposal"
section_number: "197.14"
section_subject: "What is a reasonable expectation?"
cfr_reference: "40 CFR 197.14"
title_name: "Title 40"
title_subject: "Protection of Environment"
parts_covered: "Parts 190 to 259"
revised_date: "Revised as of July 1, 2019"
publication_date: "As of July 1, 2019"
contains_description: "Containing a codification of documents of general applicability and future effect"
publication_info: "Published by Office of the Federal Register National Archives and Records Administration as a Special Edition of the Federal Register"
---
Reasonable expectation means that NRC is satisfied that compliance will be achieved based upon the full record before it. Characteristics of reasonable expectation include that it:
(a)Requires less than absolute proof because absolute proof is impossible to attain for disposal due to the uncertainty of projecting long-term performance;
(b)Accounts for the inherently greater uncertainties in making long-term projections of the performance of the Yucca Mountain disposal system;
(c)Does not exclude important parameters from assessments and analyses simply because they are difficult to precisely quantify to a high degree of confidence; and
(d)Focuses performance assessments and analyses upon the full range of defensible and reasonable parameter distributions rather than only upon extreme physical situations and parameter values.