JPS5814087A - Nuclear reactor facility - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a nuclear reactor facility in a nuclear power plant such as a fast breeder reactor, and more particularly to a nuclear reactor facility housing a reactor containment vessel.

Conventionally, in nuclear power plants such as fast breeder reactors.

A reactor containment vessel is installed in the reactor auxiliary building.

A reactor building equipped with a reactor pressure vessel is incorporated into this reactor containment vessel. Seven equipment entrances and exits are formed on the side walls of the reactor containment vessel, and through these equipment entrances,
Various nuclear reactor equipment is transported in and out during periodic reactor inspections and fuel changes. When carrying in and out various equipment, the reactor operation is stopped and the work is carried out.

However, since conventional reactor containment vessels have only one equipment loading/unloading entrance, when carrying in and out nuclear reactor equipment, the loading and unloading equipment collides with each other, making it difficult to carry out the loading and unloading work smoothly. This caused problems such as the reactor shutdown period becoming longer.

On the other hand, during the construction of a nuclear reactor plant, there is a lot of work to bring in reactor equipment to be housed in the containment vessel, so a temporary entrance was set up in addition to the single equipment entrance to carry in various reactor equipment. We are working to shorten the plant construction period by making the process smoother.

However, the temporary entrance had to be restored and blocked after the reactor equipment was brought in, and this blocking work was complex and took a long time, causing delays in the construction period of the five reactor plants. Ta.

In consideration of the above-mentioned points, this invention reduces the work time required for carrying in and out of various nuclear reactor equipment by forming a number of equipment carrying-in/out entrances on the side walls of the reactor containment vessel, thereby improving the operation and operation of the nuclear reactor plant. The purpose of this project is to provide a nuclear reactor facility that eliminates the need for a temporary equipment entrance during the installation of a nuclear power plant (Plan)N.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

Figure 7 and Figure 2-1 show nuclear reactor facilities in a nuclear power plant such as a fast breeder reactor.
/ This is the reactor auxiliary building constructed above.

The reactor containment vessel 12 is located in the center of this reactor auxiliary building IO.
Is it possible to incorporate it? A reactor building/3 is housed in the reactor containment vessel/2, and a reactor pressure vessel (not shown) is provided in the center of the reactor building/3.

There are two equipment removal ports/A on the side wall of the reactor containment vessel/2.
, /A are formed with N1 in between in the circumferential direction.

Equipment loading/unloading entrance /4, /A is the operation 1 of reactor fixtures /3
ㅅ(It is located at a level corresponding to the planting surface A, and communicates the inside and outside of the reactor containment vessel/K, and leads to the equipment loading/unloading path/g and 1g formed in the Kizuna Reactor Auxiliary Building IO. This loading/unloading entrance /g, 1g is also the equipment loading/unloading entrance /A, /A
It is located in the same position as .

As shown in FIG. 3, the equipment removal capacity/A of the reactor containment vessel 1.2 is formed in a cylindrical body 3 fixed to the ll1l wall of the reactor containment vessel 1.2 by welding or the like. Cylindrical body, 10
is preferably cylindrical, and its axis is perpendicular to the fill 13 surface of reactor containment vessel/2. The opening of the cylindrical body λθ is hermetically covered by the screw 2/ inside the reactor containment vessel /2. The lid body 2/ has a lid flange 22.

This flange 22 is removably attached to the cylindrical body flange λ integrally molded on the end of the cylindrical body with attachment means such as extra bolts 2q, and both flange surfaces are tightly attached by a sealing member 2S such as an O-ring. be done. However, the cylindrical body,
20 and both flanges 23 and 21I reinforce the equipment loading and unloading lower part, and the internal space of the cylindrical body forms an effective space for people to carry out various test instruments for the nuclear reactor.

Oh, first! Also, reference numeral 27 denotes an airlock for workers, and this airlock is also securely attached to the wall of the reactor containment vessel (111).

Next, the operation of this invention will be explained.

During normal operation of a nuclear reactor plant, the reactor containment vessel 7.
The equipment removal port /A formed in 2 is covered in an airtight state by a lid body / to form a first reactor containment vessel boundary.

During periodic reactor inspection work or fuel exchange work, the operation of the reactor plant 1 is stopped, and after this operation is stopped, the lid body is attached to the cylindrical body 20 by operating the attachment means such as the attachment bolts 2q.
Removal from the reactor containment vessel/Equipment entrance/A
, /A is opened. In this case, reactor containment vessel/2
Since the two equipment loading/unloading entrances /A and /A are arranged independently in the circumferential direction, mutually independent equipment loading/unloading routes can be obtained, and one equipment loading/unloading route can be used, for example, for loading. If the other is formed independently for carrying out, the work of carrying in and out of the reactor containment vessel can be carried out smoothly and efficiently. Thereby, fuel exchange work and periodic inspection work can be carried out smoothly and in a short time 75.

When the loading/unloading work of various reactor equipment is completed, the equipment loading/unloading entrance /A of the yA sub-reactor containment vessel /A is closed again with the cover body, 2/ to form the reactor containment vessel boundary.

Preparing for the opening of nuclear reactor plant operations.

As described above, in the nuclear reactor facility according to the present invention, equipment loading/unloading ports are formed in the side wall of the reactor containment vessel and have a number of fQit equivalent to the operation floor surface of the reactor building,
Since each equipment entrance/exit is removably closed with a sealable lid, the boundary of the reactor containment vessel is closed during reactor operation, while the fuel exchange work carried out when the reactor is shut down, the reactor equipment is By stacking the lids in a row, equipment loading/unloading work for periodic inspection work can be carried out smoothly and effectively in a short time through each equipment loading/unloading entrance, improving the operating efficiency of the nuclear reactor plant. be able to.

In addition, during the construction of a nuclear reactor plant, the equipment entrances and exits of the reactor containment vessel can be used as transport routes for construction materials and reactor equipment, so there is no need to create temporary entrances, and the reactor plant construction It is possible to shorten the period and reduce construction costs.

[Brief explanation of drawings]

Figure 1 is a half-view of the nuclear reactor facility used in this investigation, Figure 1 is a sectional view taken along the It-1 line in Figure 1, and Figure IJ3 is the
It is an enlarged view of part B of the nuclear reactor facility shown in the figure. IO...Nuclear reactor facility, //...Basic pine), /
, 2... Reactor containment vessel, /3... Reactor building, /
6...Equipment carry-in/out entrance, 1g...Equipment carry-in/out entrance 1.2
θ...Cylindrical body, 2/...Lid body, 22゜n...Flange, :l! r... Sealing member. Applicant's agent Kiyoshi Inomata 3rd

Claims (1)

[Scope of Claims] 1. In a nuclear reactor facility housing a reactor building having a reactor pressure vessel inside the reactor containment vessel, a nuclear reactor on the side wall of the reactor containment vessel and corresponding to the operation floor of the reactor building. A nuclear reactor facility characterized in that a plurality of equipment loading/unloading entrances are formed at positions where equipment loading/unloading is carried out, and each equipment loading/unloading entrance is removably closed with a sealable lid. All equipment loading and unloading entrances are located on the side wall of the reactor containment vessel. The nuclear reactor facility according to claim 7, which is formed independently so as to be spaced apart from each other in the circumferential direction. 3. Each equipment entrance/exit is formed by a cylindrical body fixed to the side wall of the reactor containment vessel by welding or the like. A nuclear reactor facility according to claim 1, wherein a lid body is removably attached to one end of the cylindrical body.