Four of the five photos released with the report show a cascade hall with a dated interior and one shows a more modern room where centrifuges were in the process of being installed. This implies the latter was recently built or that centrifuges are being updated or replaced. North Korea’s main nuclear complex is located in Yongbyon, where enrichment facilities were last expanded in 2021, while NK Pro was first to report earlier this year on a construction project to expand the floorspace of a widely suspected uranium enrichment facility in Kangson to the west of the capital.