Consequence evaluation at the Exclusion Area Boundary is frequently performed under an assumed fixed wind direction, whereas actual emergency conditions may involve rapid changes in wind direction over short time windows. This study develops a computational fluid dynamics-based framework to evaluate radiological dose variability at the EAB under short-term transient wind scenarios, with emphasis on how time-varying wind direction alters near-field atmospheric dispersion. Transient wind conditions are prescribed to represent short-duration wind shifts, and unsteady simulations are conducted over a plant-site computational domain to obtain time-dependent radionuclide concentration fields. The concentration fields are then converted to external effective dose-rate and cumulative dose metrics using dose conversion factors, and the resulting dose measures are extracted at multiple receptor locations along the EAB. By organizing dose responses in terms of temporal peaks, sector-wise variations, and receptor-to-receptor spread, the proposed workflow is intended to support EAB consequence evaluation and protective-action planning under rapidly evolving wind conditions.