A thorough existing condition survey was completed for each room area and analyzed against the relevant safety and security guideline performance criteria to determine non-compliance and potential remedial strategies. Alternative containment techniques not normally utilized with new construction had to be developed in order to work with less than ideal existing conditions and conform to applicable codes and guidelines.
The technical solutions developed incorporated innovative steel shell containment construction and new membrane coating technologies, which substantially reduced the role of structural concrete in the containment barrier system. Extensive testing and validation was performed on new technologies in order to ensure final installed performance. Full room-scale mock-ups of barrier systems, including all typical penetrations and openings were designed, built, tested rigorously, and used as final acceptance criteria before facility-wide execution of the new technologies was approved, commissioned and delivered.