K-model description of probabilistic long-range atmospheric transport in the Northern Hemisphere

Probabilistic risk assessment for long-range atmospheric transport of radionuclides

“…An alternative, simplified approach to estimate the pdf's for long-range atmospheric dispersion has recently been suggested (Lauritzen and Mikkelsen, 1999;Lauritzen et al, 2006). Here, the ensemble-average (climatological mean) concentration of a pollutant is modelled directly as an advectionediffusion process (K-model) in the 2-d horizontal plane,…”

Development of rapid atmospheric source term estimation system for AP1000 nuclear power plant

“…These considerations form the basis and highlights of the paper. In addition to the work on atmospheric source term estimation, some progresses have also been achieved in recent years in the field of fission product atmospheric dispersion and public dose calculation (Bocquet, 2012;Cheng et al, 2008;Han et al, 2012;Lauritzen et al, 2006;Nielsen et al, 1999;Sauer, 2007). As the paper focuses on atmospheric source term estimation, these progresses are not introduced at length in the paper.…”

Simulation and Expression of Atmospheric Pollution Dispersion Process Based on 3d Grid

“…The atmospheric diffusion simulation process of atmospheric pollution consists of data preparation, diffusion modeling calculation, and diffusion process deduction expression. Commonly used atmospheric diffusion models include Gaussian models (Raza et al, 2005), Lagrangian puff models (Thykier-Nielsen et al, 1999;Yu et al, 2000), Lagrangian random walk models (Yan et al, 2009;Zhang et al, 2009), Euler models (Lauritzen et al, 2006;lagzi et al, 2004), and CFD turbulence models (de Sampaio et al, 2008). These atmospheric diffusion models are relatively mature, but the expression of the diffusion process is very inadequate (Xu et al, 2009).…”