JP2019045433A5

JP2019045433A5 -

Info

Publication number: JP2019045433A5
Application number: JP2017171612A
Authority: JP
Filing date: 2017-09-06
Publication date: 2020-03-05
Anticipated expiration: 2037-09-06

Description

図１５は、伝熱管群の敷設状態の第２変形例を示すペデスタル周辺の縦断面図である。図１５は、図１４のIII−III線の方向から視た状態を示している。
図１５に示すように、伝熱管群（３，４）のうち、横管３は、縦管４の側に向かうにつれて、高さが高くなる方向に傾斜している下部ヘッダ１３ａに接続して敷設することもできる。
FIG. 15 is a longitudinal sectional view around a pedestal showing a second modified example of a laid state of the heat transfer tube group. Figure 15 shows a state as viewed from the direction of line III-III in FIG. 14.
As shown in FIG. 15, in the heat transfer tube group (3, 4), the horizontal tube 3 is connected to the lower header 13 a that is inclined in a direction of increasing the height toward the vertical tube 4. It can also be laid.

Claims

A reactor pressure vessel containing the core of the reactor,
A cylindrical pedestal supporting the reactor pressure vessel;
Inside the pedestal, laid in the space between the reactor pressure vessel and the floor surface, a heat transfer tube group through which cooling water flows, comprising:
The heat transfer tube group,
A plurality of horizontal tubes arranged so as to cover the space inside the pedestal in plan view,
A containment vessel having a plurality of vertical tubes arranged in a vertical direction so as to cover an inner wall surface of the pedestal.

The containment vessel according to claim 1,
A floor-shaped structural material is provided in a space between the reactor pressure vessel and the floor surface,
The horizontal pipe is arranged on the structural material,
The containment vessel, wherein the vertical pipe is arranged above the horizontal pipe.

The containment vessel according to claim 1,
The horizontal pipes are arranged on the floor surface,
The containment vessel, wherein the vertical pipe is arranged above the horizontal pipe.

The containment vessel according to any one of claims 1 to 3,
A reactor containment vessel in which the horizontal pipe and the vertical pipe are arranged such that heat transfer pipes that are closely arranged in parallel are arranged side by side.

The containment vessel according to any one of claims 1 to 3,
A reactor containment vessel in which the horizontal pipes and the vertical pipes are arranged such that heat transfer pipes arranged in parallel at intervals are joined to a common plate at a side surface.

The containment vessel according to any one of claims 1 to 3,
A reactor containment vessel in which the horizontal pipes and the vertical pipes are arranged such that heat transfer pipes arranged in parallel at intervals are connected to each other via a plate on a side surface.

The containment vessel according to any one of claims 1 to 3,
A reactor containment vessel in which the horizontal tubes and the vertical tubes are arranged such that rows of heat transfer tubes arranged in parallel at intervals are alternately stacked.

The containment vessel according to any one of claims 1 to 3,
The reactor containment vessel, wherein the horizontal pipe communicates with the vertical pipe, and is inclined in a direction in which the height increases toward the vertical pipe.

The containment vessel according to any one of claims 1 to 3,
A cooling water tank provided above the containment vessel,
Circulating piping for circulating the cooling water between the cooling water tank and the heat transfer tube group,
The containment vessel, wherein the circulation pipe connects the cooling water tank and the horizontal pipe group via a height lower than a height at which the horizontal pipe group is laid.

The containment vessel according to any one of claims 1 to 3,
A cooling water tank provided above the containment vessel,
Circulating piping for circulating the cooling water between the cooling water tank and the heat transfer tube group,
The containment vessel, wherein the circulation pipe includes a radiation fin for promoting heat radiation from the cooling water.

The containment vessel according to any one of claims 1 to 3,
A cooling water tank provided above the containment vessel,
Circulating piping for circulating the cooling water between the cooling water tank and the heat transfer tube group,
The reactor containment vessel, wherein the circulation pipe includes a normally closed isolation valve that isolates between the cooling water tank and the heat transfer tube group.

The containment vessel according to claim 11 ,
A radiation sensor for detecting a radioactive substance in the cooling water,
The containment vessel, wherein the isolation valve that is in the open state is controlled to be closed when a leak of radioactive material is detected in the cooling water.