Improvement of Core Performance by Introduction of Moderators in a Blanket Region of Fast Reactors

Table 5

Comparison of Doppler coefficient between cores with and without moderator.

Core	Cycle	Doppler coefficient; (Δ𝑘/𝑘𝑘^′/dT/𝑇)
Core with 61 deuteride moderator pins	Equilibrium cycle	−9.86𝐸−3
Core without moderator pins	Equilibrium cycle	−6.70𝐸−3