MODELING IGNEOUS DISRUPTION IN YUCCA MOUNTAIN TOTAL SYSTEM PERFORMANCE ASSESSMENT

摘要

Although the probability of volcanic activity at Yucca Mountain is small, consequences of igneous disruption of the potential repository have been included explicitly in the total system performance assessment for the Yucca Mountain Site Recommendation (TSPASR). 1 The overall probability-weighted mean igneous dose rate reaches a peak during the first 10,000 years of approximately 0.08 mrem/yr, occurring at 10,000 years. At later times, the calculated mean igneous dose rate is higher, increasing slowly to approach 0.2 mrem/yr at the end of the 50,000-year period. This peak mean igneous dose is dominated entirely by the groundwater releases following igneous intrusion, for which 239Pu and 237Np are the primary contributors.