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JournalofNuclear Materials 85 & 86(1979)57-64 0 North-HollandPublishingCompany
 

Summary: JournalofNuclear Materials 85 & 86(1979)57-64
0 North-HollandPublishingCompany
A COMPARATIVE STUDY OF THE PERFORMANCE AND ECONOMICS OF ADVANCED AND CONVENTIONAL STRUCTURAL
MATERIALS IN FUSION SYSTEMS*
M. A. ABDOU, Z. EL-DERINI
School of Nuclear Engineering
Georgia Institute of Technology
Atlanta, Georgia 30332
The impact of the neutron wall load as well as the lifetime and operating temperature of the
structural material on tokamak reactor economics was investigated and a comparative study of
stainless steel and vanadium alloys was performed. In order to limit the fractional increase in
the cost of energy due to the plant downtime, t, for replacement of the structural material to
6, the structure lifetime, T, must be greater than t/6 where T and t are in years. Economically
attractive tokamak reactors produce a neutron wall load of 3-4 MW/m* for 3000 MW thermal power.
The cost of energy is optimized by an operating temperature of the structural material in the
wall/blanket in the range 475-500C for stainless steel and 620-66O'C for vanadium alloys. The
gain in electric power due to higher operating temperatures is not sufficient to offset the
penalty in the capital cost associated with the use of vanadium alloys as compared to stainless
steel. Therefore, the vanadium alloy must exhibit a significant lifetime advantage over stain-
less steel to be economically competitive. The magnitude of this advantage is particularly

  

Source: Abdou, Mohamed - Fusion Science and Technology Center, University of California at Los Angeles

 

Collections: Plasma Physics and Fusion