UF6泄漏事故源项分析研究进展OA

Uranium hexafluoride(UF6)plays a critical role in the front end of the nuclear fuel cycle and is extensively used in uranium conversion,enrichment,and fuel fabrication processes.Due to its physico-chemical properties and widespread application,UF6 leakage accidents occur frequently and may result in severe radiological and chemical hazards,making them a major concern in nuclear safety analysis.This pa-per systematically reviews recent domestic and international research progress on UF6 leakage source term analysis and calculation methods.According to the release location and physical phase,UF6 leakage sce-narios are classified into two representative categories:vessel leakage and pipeline leakage.The leakage mechanisms of gaseous,liquid,and solid UF6 under different process conditions are comparatively ana-lyzed.Furthermore,existing limitations of current source term models are discussed,and potential direc-tions for future research on UF6 leakage source term analysis are proposed.The present review aims to pro-vide a theoretical basis for consequence assessment and emergency decision-making in UF6 leakage acci-dents.