| 摘要 |
PROBLEM TO BE SOLVED: To provide a reactor core flow control system in a boiling water nuclear power plant having internal pumps, avoiding lowering of the output during the disturbance of a power supply due to system-shutdown and suitably maintaining soundness of the fuel. SOLUTION: The boiling water nuclear power plant, having a plurality of internal pumps 3-1 to 3-10 uses a MG set with a fluid joint consisting of a MG set drive motor 403, a fluid joint 404 and a variable frequency generator 405, as a variable frequency power supply for the internal pumps, with all of the plurality of internal pumps connected to the MG set with the fluid joint. The plurality of internal pumps are divided into plural groups 3-1 to 3-5 and 3-6 to 3-10, each group of which is connected with the MG sets with fluid joints 403A, 404A, 405A and 403B, 404B and 405B.
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