| 摘要 |
<P>PROBLEM TO BE SOLVED: To propose a pressurized water reactor capable of improving uniformity of distribution of coolant flow at the inlet to a reactor core to suppress a change in the flow of coolant that flows into the reactor core. <P>SOLUTION: A fast reactor 1 includes an upper support base 16 and a lower support base 17 that are provided on a body portion 3b of a reactor vessel 3 having a closed-end cylindrical shape; a reactor core 7 that is accommodated in the reactor vessel; a reactor core barrel 8 that surrounds the reactor core 7; a neutron shield 12 that is provided at a position closer to the inner surface of the reactor vessel 3 than the reactor core barrel 8; and a reactor core support structure 15. The reactor core support structure 15 is produced by integrally forming: an annular upper support plate 35 that is fixed on the upper support base 16; a support cylinder 36 that is suspended from an inner edge portion of the upper support plate 35; and a circular lower support plate 37 that is provided at the lower edge portion of the support cylinder 36, is in contact with the lower support base 17, and supports the reactor core 7, reactor core barrel 8 and neutron shield 12. <P>COPYRIGHT: (C)2012,JPO&INPIT |
