ASCE has honored the writing team of S. Sujitha; K. Geetha Manjari; Sampurna Datta, S.M.ASCE; and G. L. Sivakumar Babu, Ph.D., F.ASCE, with the 2017 Wesley W. Horner Award for their paper “Risk and Reliability Analysis of Multibarrier System for Near-Surface Disposal Facilities,” Journal of Hazardous, Toxic, and Radioactive Waste, April 2016.
In this work, the researchers model for migration of contaminants in a multibarrier system for the safety assessment of near-surface disposal facilities (NSDFs). The model considers scenarios during dumping period, after the dumping period, and after the closure of the NSDF. In all the scenarios evaluated, a third-order polynomial gave the best fit for the model and coefficient of determination (R2) of 0.99 was obtained for a third-order polynomial. Reliability analysis was carried out, and the probability of failure of an annual radiation dose of 14C exceeding the permissible limits was estimated for different scenarios.
The results show that the probability of failure of the system in all scenarios is very low, confirming the adequacy of the system.
The Wesley W. Horner Award recognizes papers that have contributed to the areas of hydrology, urban drainage, or sewerage.