EPRI's news release summarizes the results of its study, Yucca Mountain Licensing Standard Options for Very Long Time Frames .

"The radiation protection standard for the Yucca Mountain, Nevada, spent nuclear fuel repository should be fundamentally different for the periods exceeding 10,000 years, according to a new study just published by the Electric Power Research Institute (EPRI). The recommendations in the report recognize that detailed information about processes and events taking place many tens of thousands of years in the future will not be available and that different requirements are necessary to explicitly acknowledge that uncertainties increase with time."