As energy security and carbon neutrality have become important challenges globally, the demand for nuclear new-builds and life extensions for operating units is rising. However, writes Guen Park, Director of KHNP's Overseas NPP Power Office, the challenge is to deliver nuclear power projects on time and within budget despite global uncertainties, post-pandemic supply chain disruptions and a stricter regulatory environment. The uncertainty from these external factors means that concerns over contracts where one supplier is responsible for engineering, procurement and construction are also increasing.