| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress fluid excitation vibration generated in a core internal structure by reducing excitation force due to a flow of a coolant in a downcomer part in a reactor pressure vessel of a pressurized water reactor. <P>SOLUTION: The pressurized water reactor includes: a reactor pressure vessel 1; a core barrel 2 forming an annular flow passage part 9 between the core barrel 2 and an inside surface of the reactor pressure vessel 1; a plurality of coolant outlet nozzles 5a, 5b and a plurality of coolant inlet nozzles 4a to 4d formed on the side face of the reactor pressure vessel 1; and a flow resistance board 21 arranged in the annular flow passage part 9 to equalize flow velocity distribution of the coolant allowed to flow from the coolant inlet nozzles 4a to 4d under the annular flow passage part 9. <P>COPYRIGHT: (C)2013,JPO&INPIT |
