Pressurized water reactor

Patent metadata

Field	Value
Publication number	US-9251919-B2
Application number	US-201113993227-A
Country	US
Kind code	B2
Filing date	Dec 13, 2011
Priority date	Dec 13, 2010
Publication date	Feb 2, 2016
Grant date	Feb 2, 2016

Abstract

The pressurized water reactor according an embodiment comprises: a cylindrical reactor pressure vessel ( 1 ) to which inlet nozzles are connected; fuel assemblies which are contained within the reactor pressure vessel ( 1 ); a cylindrical reactor core barrel ( 3 ) which surrounds the fuel assemblies and forms an annular downcomer ( 6 ) between the reactor core barrel ( 3 ) and the inner surface of the reactor pressure vessel ( 1 ); and radial supports. The radial supports are supports which are arranged below the downcomer ( 6 ) at intervals in the circumferential direction, each has vertical flow path formed therein, and position the reactor core barrel ( 3 ) and the reactor pressure vessel ( 1 ). The radial supports each has, for example, a flow path-equipped radial keys ( 21 ) and a key groove member ( 40 ).

First claim

What is claimed is:

1. A pressurized water reactor comprising:
a cylindrical reactor pressure vessel having a vertically-extending axis and connected with a plurality of inlet nozzles at a side surface thereof;
a plurality of fuel assemblies accommodated in the reactor pressure vessel;
a cylindrical reactor core barrel having a vertically-extending axis, the reactor core barrel surrounding the plurality of fuel assemblies, and forming an annular downcomer between itself and an inner side surface of the reactor pressure vessel; and
a plurality of radial supports arranged spaced apart from each other in a circumferential direction in the downcomer provided below the inlet nozzles so as to position the reactor core barrel and the reactor pressure vessel, wherein
each of the radial supports includes:
a key groove member having a vertically extending key groove, the key groove member being fixed to one of the inner side surface of the reactor pressure vessel and an outside of the reactor core barrel; and
a key having a vertically extending flow path therein, the key being fixed to the other of the inner side surface of the reactor pressure vessel and the outside of the reactor core barrel, the key protruding towards a corresponding key groove member to fit in the key groove of the corresponding key groove member.

2. The pressurized water reactor according to claim 1 , wherein
the key groove members are fixed to the inner side surface of the reactor pressure vessel; and
the keys protrude outward from the reactor core barrel and are inserted at least partially into the corresponding key grooves.

3. The pressurized water reactor according to claim 1 , wherein
the key groove members are fixed to the outside of the reactor core barrel; and
the keys protrude inward from the inner side surface of the reactor pressure vessel and are inserted at least partially into the corresponding key grooves.

4. The pressurized water reactor according to claim 1 , wherein
each of the radial supports includes a first magnetic body fixed to the inner side surface of the reactor pressure vessel and a second magnetic body fixed to the outside of the reactor core barrel so as to face the first magnetic body.

5. The pressurized water reactor according to claim 4 , wherein
the radial supports are installed over an entire circumferential direction of the reactor core barrel.

6. The pressurized water reactor according to claim 1 , wherein
the key has a protruding portion that protrudes towards the corresponding key groove member, and
the vertically extending flow path of the key is provided within the protruding portion of the key.

7. The pressurized water reactor according to claim 6 , wherein
the vertically extending flow path of the key is provided in a center of the protruding portion of the key.

Assignees

• Iwaki Chikako
• Ikeda Tatsumi
• Yamamoto Tetsuzo
• Watanabe Masanobu
• Abe Satoru
• Uchida Ken
• Sato Hisaki
• Okuda Ken
• Ito Kiichi
• Toshiba Kk

Inventors

• Iwaki Chikako
• Ikeda Tatsumi
• Yamamoto Tetsuzo
• Watanabe Masanobu
• Abe Satoru
• Uchida Ken
• Sato Hisaki
• Okuda Ken
• Ito Kiichi

Classifications

• Y02E30/32

  Cross-Sectional Technologies · mapped topic

• G21C13/02 Primary

  Details · CPC title

• G21C15/02 Primary

  Arrangements or disposition of passages in which heat is transferred to the coolant; {Coolant flow control devices (G21C19/04 takes precedence; coolant flow control through fuel assemblies, e.g. flow restrictors G21C3/322)} · CPC title

• Y02E30/30

  Nuclear fission reactors · CPC title

• G21C5/10

  Means for supporting the complete structure {(arrangements for supporting vessels and core-structures G21C13/024)} · CPC title