Design Verification of HVAC Duct Turning Vanes in Nuclear Power Plants

by Subir Roy, Sargent & Lundy Engineers, Chicago, IL, USA,
Asit K. Chatterji, Sargent & Lundy Engineers, Chicago, IL, USA,
James M. Doyle, Sargent & Lundy Engineers, Chicago, IL, USA,

Document Type: Proceeding Paper

Part of: Structural Engineering in Nuclear Facilities


HVAC ducts in nuclear power plants utilize short radius elbow construction with turning vanes to minimize the space requirement for duct work and to reduce flow losses in the elbows. Turning vane construction is essentially based on SMACNA standards, which are primary intended for low-velocity applications for commercial purposes. In nuclear power plant applications, turning vane construction must be structurally verified considering the effects of pressure, seismic, dynamic airflow and flow-induced turbulence. This paper presents the structural design considerations required to qualify turning vanes. Qualification criteria, some developed from testing of as-built turning vanes, are described.

Subject Headings: Power plants | Verification | Duct | Vanes | Nuclear power | Dynamic pressure | Air flow | Building codes

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