JPS5985991U

JPS5985991U - boiling water reactor

Info

Publication number: JPS5985991U
Application number: JP1982181887U
Authority: JP
Inventors: 江畑　茂男
Original assignee: 株式会社東芝
Priority date: 1982-12-02
Filing date: 1982-12-02
Publication date: 1984-06-11

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来の沸騰水型原子炉を示す部分的な断面図、
第２図はポンプ電動機電源喪失した場合における燃料棒
表面熱流束と冷却材流量の過渡変化を示すグラフ、第３
図は本考案に係る沸騰水型原子炉の一実施例を示す断面
図、第４図は第３図“の要部を拡大して示す図、第５図
はポンプ電源喪失時における燃料棒表面熱流と冷却材流
量の過渡変化を示す第２図と同様なグラフである。ＬＯ・・・原子炉圧力容器、１１・・・炉心シュラウド
、１２・・・燃料集合体、１３・・・炉心、１４・・・
冷却材、１５・・・気水分離器、１８・・・給水スパー
ジャ、２０・・・制御棒駆動機構、２１・・・環状流路
、２２・・・インターナルポンプ、２３・・・モータケ
ース、２４・・・電動機、２５・・・回転軸、２６・・
・ポンプインペラ、２８・・・ポンプディフューザ、３
０・・・冷却材流路。第　３　図第　４　図Figure 1 is a partial cross-sectional view of a conventional boiling water reactor.
Figure 2 is a graph showing transient changes in fuel rod surface heat flux and coolant flow rate when pump motor power is lost;
The figure is a cross-sectional view showing an embodiment of the boiling water nuclear reactor according to the present invention, Figure 4 is an enlarged view of the main part of Figure 3, and Figure 5 is the fuel rod surface when the pump power is lost. It is a graph similar to Fig. 2 showing transient changes in heat flow and coolant flow rate. LO... Reactor pressure vessel, 11... Core shroud, 12... Fuel assembly, 13... Reactor core. 14...
Coolant, 15... Steam water separator, 18... Water supply sparger, 20... Control rod drive mechanism, 21... Annular flow path, 22... Internal pump, 23... Motor case , 24... Electric motor, 25... Rotating shaft, 26...
・Pump impeller, 28...Pump diffuser, 3
0... Coolant flow path. Figure 3 Figure 4

Claims

[Claims for Utility Model Registration] 1. In a boiling water reactor in which a plurality of internal pumps are provided in a coolant annular flow path formed between a reactor pressure vessel and a reactor core shroud, A boiling main type nuclear reactor characterized in that a pump diffuser with a coolant flow path formed inside is provided so as to cover a pump impeller of a pump. 2. The boiling water nuclear reactor according to claim 1, wherein the pump diffuser is installed upright on a pump deck provided between the lower end of the core shroud and the inner wall of the reactor pressure vessel. 3. The pump diffuser is formed into a cylindrical shape with a small cross-sectional area of the coolant flow path, extends upward along the annular flow path to make the coolant flow path long, and has an open top end. Boiling water reactor according to item 1.