NAS has an established history of providing expert engineering analysis for the nuclear power industry. NAS is able to handle a wide range of analytical needs, including investigating system and equipment performance, evaluating improvement options, and verifying the capability of plant systems under normal and accident conditions. Part of the experience of NAS involves NAS's trademarked software: PROTO-FLO™, PROTO-HX™, PROTO-HVAC™, and PROTO-SPRINKLER™. Being able to construct a wide range of complex system and component models with these programs gives NAS further capabilities and confidence in providing thermal-hydraulic, heat transfer, and HVAC analysis.

NAS's powerful, easy-to-use programs provide broad capability for modeling complex piping, heat exchangers, HVAC systems, and fire protection systems in a Microsoft Windows-based graphic environment.