| 摘要 |
PROBLEM TO BE SOLVED: To flatten reactor core outlet coolant enthalpy. SOLUTION: The reactor arranges in parallel, a plurality of core units having fuel channel boxes 2 constituted in a cylinder shape which contains a plurality of fuel rods 1 and passes coolant inside and are arranged in a grid shape parallel to each other, flow resistance stacks 5 arrayed in the axial direction at the inlet side of the fuel channel boxes 2, connected to the coolant inlet of the fuel channel boxes 2 and constituted by providing inside flow resistance plates 4 capable of flow resistance control so as to pass coolant inside, control rods 6 arranged movably in the axial direction in a space in between 4 fuel channel boxes 2 arrayed in 2×2 matrix and a space surrounded by 4 flow resistance stacks 5. COPYRIGHT: (C)2005,JPO&NCIPI
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