| 摘要 |
PROBLEM TO BE SOLVED: To provide a reactor pressure vessel capable of preventing a reactor core internal structure, which is disposed in the reactor pressure vessel, from getting damaged due to vibrations caused from a fluid and capable of reducing stress generated on the reactor core internal structure.SOLUTION: The reactor pressure vessel includes: a reactor pressure vessel body; plural in-furnace nuclear instrumentation guide tubes 28 which are vertically disposed on the furnace bottom 25 in the lower part of the core 13 in the reactor pressure vessel body; plural in-furnace nuclear instrumentation housings 29 each of which is coaxially connected to the lower part of the in-furnace nuclear instrumentation guide tubes 28 via a connection block 32 and a step part 33; and a connection beam 31 for coupling the neighboring in-furnace nuclear instrumentation housings 29 at the step part 33.SELECTED DRAWING: Figure 2 |
