User Experiences with ICSBEP Distributed Sensitivity Data Profdes with the SCALE Sensitivity and Uncertainty Methods as of Winter 2019

摘要

A primary barrier to the implementation of S/U methods in criticality safety validation is the engineering and computation time necessary to generate an appropriate library of SDFs for a large number of critical experiments. ORNL has tried to ameliorate this difficulty by distributing over 450 SDFs generated through the VALID procedure. The NEA has also generated and made available several thousand additional SDFs. These files can be used directly by analysts in screening experiments for applicability to specific safety application models. The confirmation of the sensitivity data with direct perturbation calculations [7] should allow somewhat broader application of these data for trending on the C_k parameter and estimating penalty factors for unvalidated nuclides. None of this data can eliminate the requirement that each institution generate their own models and generate k_(eff) values for use in validation, but the process of implementing rigorous, modern S/U-based validation techniques can be streamlined by using this available resource.