JPS61190898U

JPS61190898U -

Info

Publication number: JPS61190898U
Application number: JP1985074220U
Authority: JP
Priority date: 1985-05-21
Filing date: 1985-05-21
Publication date: 1986-11-27

Description

[Brief explanation of the drawing]

第１図は本考案による沸騰水型原子炉の一実施
例を示す断面図、第２図は第１図―線に沿う
拡大断面図、第３図は第２図―線に沿う拡大
断面図である。１……原子炉圧力容器、２……炉心、７……炉
心シユラウド、８……シユラウドサポートレグ、
９……環状炉水通路、１０……環状炉水通路の底
仕切板、１１……原子炉内循環ポンプ、１１Ｐ…
…ポンプ部、１１Ｍ……モータ部、１２……補強
板、１３……パツド、ｇ……クリアランス。 Figure 1 is a sectional view showing an embodiment of the boiling water nuclear reactor according to the present invention, Figure 2 is an enlarged sectional view taken along the line of Figure 1, and Figure 3 is an enlarged sectional view taken along the line of Figure 2. It is. 1... Reactor pressure vessel, 2... Reactor core, 7... Core shroud, 8... Shroud support leg,
9...Annular reactor water passage, 10...Bottom partition plate of the annular reactor water passage, 11...Reactor circulation pump, 11P...
...Pump part, 11M...Motor part, 12...Reinforcement plate, 13...Pad, g...Clearance.

Claims

[Scope of Claim for Utility Model Registration] (1) An annular reactor in which a reactor shroud that supports the reactor core is housed in a reactor pressure vessel, and a bottom partition plate is partitioned between the core shroud and the reactor pressure vessel. A water passage is formed, and a required number of reactor circulation pumps are installed on the bottom partition plate of this annular reactor water passage so that their pump parts look into the passage, and the inside of the annular reactor water passage is connected to the core shroud. The pump parts of each reactor circulation pump are separated by reinforcing plates protruding radially from the reactor, and the end faces of each reinforcing plate are connected to the inner circumferential wall of the reactor pressure vessel and the annular shape during normal operation of the reactor. A boiling water reactor characterized by not being fixed to the bottom partition plate of the reactor water passage. (2) A pad is provided on the inner peripheral wall of the reactor pressure vessel facing the end of each reinforcing plate, and the clearance between this pad and the end of the reinforcing plate constitutes the reinforcing plate and the reactor pressure vessel. A boiling water nuclear reactor according to claim 1, wherein the boiling water nuclear reactor is constructed such that the thermal expansion becomes zero due to a difference in thermal expansion between different metals. (3) The boiling water nuclear reactor according to claim 1, wherein the position of the upper end of the reinforcing plate is below the position of the lower end of the effective fuel in the reactor core.