Scanning electron photomicrograph of acicular uranophane filling a void within the orebody at Nopal I. Isotopic analyses were conducted on acicular uranophane collected from fractures within the orebody at Nopal I. Field of view is 0.1 mm across
Uranium-series and U/Pb isotope systematics are useful in constraining the nature and timing of U transport at the Nopal I uranium deposit in the Sierra PeÃ±a Blanca. Nopal I is similar to the U.S. Nuclear Regulatory Commissionâ€™s proposed Yucca Mountain, Nevada, high-level nuclear waste geologic repository system.
Center for Nuclear Waste Regulatory Analyses (CNWRA) staff presented the results of isotopic analyses of Nopal I rock samples and mass spectrometry of Nopal I uranophane and nearby water samples in an article published in the Proceedings of the Seventh Natural Analogue Working Group (NAWG) meeting (Abstract). Staff also published a geochemical chronology of uranium behavior at Nopal I in an article in the Proceedings of the Eighth NAWG meeting (Abstract).
A study CNWRA staff performed to evaluate water-rock interaction and radionuclide release and transport at the site was published in Scientific Basis for Nuclear Waste Management XXII, Materials Research Society Symposium Proceedings (Abstract).
Nuclear Regulatory Commission (NRC) • Yucca Mountain Project (YMP) • Office of Civilian Radioactive Waste Management (OCRWM) • Sierra Peña Blanca • Nopal I uranium deposit • uraninite alteration • Yucca Mountain • performance assessment modeling of nuclear waste geologic repositories