On comparative evaluation methods for NPP versions with different steam cycle parameters

Comparative evaluation methods for fast reactor NPP with different parameters of the steam cycle are discussed. The comparative evaluation methods at Nsub(cl)=const and Nsub(therm)=const powers are compared. It is shown that in the first case the parameters lesser than in the second case are optimal. It is proposed to compare versions at similar restrictions on the reactor sizes, core and other equipment parameters, which are restricted. The proposed method is illustrated by comparison of low, average and high parameters for a fast reactor at 1500-1600 MW power. The economical estimations show that under considered conditions the version with moderate parameters of the steam cycle 140 atm, 495 deg C (after the steam generator) is the optimum one