Double-wall tube steam generator for breeder nuclear plants

The Westinghouse steam generator concept, chosen for breeder reactor application, provides a double barrier between the two heat transfer fluids. This barrier consists of double-wall tubes with third-fluid (helium) leak detection capability and double (redundant) tube-to-tubesheet welds at both ends of the unit. The paper describes the design and analysis of the steam generator under breeder reactor operation either in a once-through mode or under recirculating cycle conditions, including the development and testing activities to verify the design. 5 refs.