{"data":{"id":"us/10-cfr-63.304","jurisdiction":"us","citation":"10 CFR 63.304","heading":"Reasonable expectation.","body":"Reasonable expectation means that the Commission is satisfied that compliance will be achieved based upon the full record before it. Characteristics of reasonable expectation include that it:\n(1) Requires less than absolute proof because absolute proof is impossible to attain for disposal due to the uncertainty of projecting long-term performance;\n(2) Accounts for the inherently greater uncertainties in making long-term projections of the performance of the Yucca Mountain disposal system;\n(3) Does not exclude important parameters from assessments and analyses simply because they are difficult to precisely quantify to a high degree of confidence; and\n(4) Focuses performance assessments and analyses on the full range of defensible and reasonable parameter distributions rather than only upon extreme physical situations and parameter values.","path":["Title 10—Energy","CHAPTER I—NUCLEAR REGULATORY COMMISSION","PART 63—DISPOSAL OF HIGH-LEVEL RADIOACTIVE WASTES IN A GEOLOGIC REPOSITORY AT YUCCA MOUNTAIN, NEVADA","Subpart L—Postclosure Public Health and Environmental Standards"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-10.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:24:09Z","sha256":"aa0e7cf9000ba8f195d657de52b80bcecdd277ea7c098e6021b7b4398379aad3","source_id":"us-cfr","stale":true,"prev":"us/10-cfr-63.303","next":"us/10-cfr-63.305"},"notice":"GroundRules: Original legal text. Not legal advice."}