fabricated by injection casting as the same as the conventional metallic fuel. This
step makes the allowable maximum melting temperature of the fuel alloy less than
1,200
C to prevent Am volatilization during injection casting [12].
15.3 Parametric Analysis on the Effect of Measures
This chapter describes parametric analysis methodology and analysis results for
Doppler feedback enhancement and burn-up reactivity swing reduction.
15.3.1 Parametric Analysis Methodology
A hypothetical 300 MWe fast reactor core was used for the parametric survey to
enhance Doppler feedback and burn-up reactivity swing. Table 15.1 and Fig. 15.2
Table 15.1 Assumed
condition of the 300 MWe
fast reactor core for
the parametric survey
Items
Value
Reactor thermal power
714 MW
Operation cycle length
150 days
Fuel type
TRU 10 wt% Zr alloy
Number of fuel pins per S/A
169
Core diameter
180 cm
Fuel pin diameter
0.65 cm
Core height
93 cm
TRU composition
LWR discharged
10 years cooled
Inner
Core
Outer
Core
Radial
Reflector
Axial
Reflector
Gas
Plenum
Control Rod
Control Rod Follower
Fig. 15.2 RZ geometry for parametric survey
15 Development of Uranium-Free TRU Metallic Fuel Fast Reactor Core
159