RASCAL Version 2.1 workbook. Volume 2, Revision 2

Abstract

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Regulatory Technology Development Plan - Sodium Fast Reactor. Mechanistic Source Term - Trial Calculation. Work Plan

“…The sensitivity calculation will be performed by an independent contractor 7 , as a mechanism to ensure that any potential assumptions or biases of the staff performing the mechanistic calculation are not also present in the sensitivity analysis. To assist in the examination of multiple sensitivity analyses, the RASCAL radionuclide offsite dispersion code, which was developed by the NRC for rapid assessments [11], will be utilized.…”

Regional Atmospheric Transport Code for Hanford Emission Tracking, Version 2(RATCHET2)

“…Gaussian models are used to describe the atmospheric dispersion of radioactive and chemical effluents from nuclear facilities. These models have frequently been used in licensing and emergency response calculations (e.g., PAVAN [Bander 1982], XOQDOQ [Sagendorf et al 1982], MESORAD [Scherpelz et al 1986;Ramsdell et al 1988], and RASCAL Version 2.0 [Athey et al 1993;McGuire et al 2003]) because they quickly provide reasonable estimates of atmospheric concentrations, deposition, and doses given relatively limited information on topography and meteorology. A Lagrangian trajectory, Gaussian puff model is used where temporal or spatial variations in meteorological conditions or depletion of the plume due to dry deposition may be significant.…”