{"data":{"id":"us/40-cfr-197.26","jurisdiction":"us","citation":"40 CFR 197.26","heading":"What are the circumstances of the human intrusion?","body":"For the purposes of the analysis of human intrusion, DOE must make the following assumptions:\n(a) There is a single human intrusion as a result of exploratory drilling for ground water;\n(b) The intruders drill a borehole directly through a degraded waste package into the uppermost aquifer underlying the Yucca Mountain repository;\n(c) The drillers use the common techniques and practices that are currently employed in exploratory drilling for ground water in the region surrounding Yucca Mountain;\n(d) Careful sealing of the borehole does not occur, instead natural degradation processes gradually modify the borehole;\n(e) Only releases of radionuclides that occur as a result of the intrusion and that are transported through the resulting borehole to the saturated zone are projected; and\n(f) No releases are included which are caused by unlikely natural processes and events.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER F—RADIATION PROTECTION PROGRAMS","PART 197—PUBLIC HEALTH AND ENVIRONMENTAL RADIATION PROTECTION STANDARDS FOR YUCCA MOUNTAIN, NEVADA","Subpart B—Public Health and Environmental Standards for Disposal"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"5cc2b5783f87b9e7e1daf495424dffde5311d63b68aae4cf7d2109a9c2190210","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-197.25","next":"us/40-cfr-197.30"},"notice":"GroundRules: Original legal text. Not legal advice."}