Design Concept of Advanced Sodium-Cooled Fast Reactor and Related R&D in Korea

Table 3

Core performance of demonstration cores.

	Uranium core	LTRU core	MTRU core
Charged fuel enrichment (U, TRU) (wt.%) (inner/outer core)	15.0/20.0	19.2/24.8	21.5/28.8
Conversion ratio (Fissile/TRU)	0.54/−	0.80/0.71	0.81/0.64
Burnup reactivity swing (pcm)	1,698	2,588	2,945
Cycle length (EFPD)	255	365	365
Avg. discharged burnup (MWD/kg) (inner/outer core)	51.8/42.4	83.4/76.0	79.5/81.9
Peak fast neutron fluence (×10^23 n/cm^2)	1.92	3.23	3.12
Power peaking factor (BOEC/EOEC)	1.480/1.53	1.50/1.44	1.57/1.50
TRU consumption rate (kg/cycle)	—	145.9	184.9
Sodium void worth (EOEC, $)	−0.22	7.70	7.03
Doppler coefficient (pcm/°C)	−1172.7𝑇^−1.122	−1012.4𝑇^−1.152	−911.0𝑇^−1.149
Axial expansion coefficient (pcm/°C)	−0.140	−0.217	−0.268
Radial expansion coefficient (pcm/°C)	−0.780	−0.949	−0.980
Sodium density coefficient (pcm/°C)	0.076	0.717	0.627