The operational efficiency and developmental progress of nuclear power entities are significantly challenged by organizational vulnerability, which can lead to severe outcomes if neglected. This paper presents a systematic approach to identifying and quantifying the primary factors influencing organizational vulnerability within nuclear power plants (NPPs). An evaluative index is established, and an innovative hybrid methodology combining the Analytic Hierarchy Process (AHP) and fuzzy sets theory is applied to assess overall organizational vulnerability. A case study validates the approach, de...