1. Design a fast reactor core with an electric power of 1,000 MW under the following conditions.

(i) Reactor thermal power: 2,500 MWt

(ii) Power fraction of core fuel: 92 %Power fraction of blanket fuel: 8 %

(iii) Average linear heat generation rate: 230 W/cm

(iv) Core height: 100 cm

(v) Number of fuel elements per assembly: 271

(vi) Radial blanket region 2 layers

2. Estimate the average discharged burnup of the core fuel after operating the reactor designed in problem 1 for 24 months. Assume MOX fuel and a dispersed refueling method with 3 batches. Other conditions are as below.

(i) Diameter of fuel element: 8.5 mm

(ii) Clad thickness: 0.4 mm

(iii) Smear density of fuel (ps): 9.5 g/cm3

3. Calculate the fuel centerline temperature of a fast reactor when the pellet surface temperature is 900 ° C and the linear heat generation rate is 400 W/cm. Assume a constant thermal conductivity of 0.023 W/(cm«°C) in the fuel pellet without temperature dependency.

4. Explain the reason and the major limiting factors of flow distribution design in fast reactors.