JPH02240596A - Reactor containment facility - Google Patents

Abstract

PURPOSE:To facilitate the removal of the decay heat of plural units of reactor pressure vessels and to provide the compact facilities by making common use of a suppression chamber which has the water volume and space for one unit of the reactor pressure vessel for plural units of the pressure vessels. CONSTITUTION:Two units of the pressure vessels 2 are inserted and fixed into a pedestal 12 formed to an elliptical shape. The inside of the pedestal 12 is partitioned by double partition walls 14 having flow passages 13 in a part thereof. Both ends between these partition walls 14 are respectively provided with dry well sumps 15. The pedestal 12 is circumferentially covered with the suppression chamber 5 in which suppression pool water W is housed. The volume of the pool water W in the chamber 5 and the space volume thereabove are set at the values at which the dealing with an anticipated accident for one unit 2 can be made. The chamber is thus so constituted as to be commonly used for two units of the vessels 2. The volume in the pedestal where the vessels 2 are provided is merely required to be increased and the protections required are for one unit only. The compact facilities are thus obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a nuclear reactor containment facility, and particularly to a pressure suppression type reactor containment facility having a plurality of reactor pressure vessels therein.

[Prior Art] It is well known that the reactor pressure vessel of a nuclear couplant is generally installed in a reliable reactor containment facility in order to prevent the influence of radiation to the outside.

As shown in FIG. 3, the reactor pressure vessel 2 of the reactor containment facility is housed in a reactor containment vessel 3 provided concentrically therewith. Specifically, the pressure vessel 2 is inserted and fixed into a pedestal 6 that partitions a lower dry well 4 and a suppression chamber 5. A main steam pipe (not shown) extending to a turbine (not shown) is connected to this pressure vessel 2, and excess pressure generated in the pressure vessel 2 is released via a safety valve 7 to a pressure relief pipe ( (not shown) in the pool water of the suppression champara. The removal of decay heat in the event of a hypothetical accident relied on the pool water in the suppression chamber 5.

In addition, 8 in the figure is an airlock for staff to enter and exit.

[Claim 11F to be solved by the invention By the way, in this type of reactor containment facility, in the design of decay heat removal, etc., one reactor pressure vessel 2 is installed inside one reactor containment vessel 3. Because the design is such that it can accommodate only one pressure vessel, it is not possible to install multiple pressure vessels 2, and if multiple pressure vessels 2 are installed together, a containment vessel 3 corresponding to the number will be required, and the reactor containment There was a problem that the facilities were becoming larger.

In view of the above-mentioned problems, an object of the present invention is to provide a compact nuclear reactor containment facility that can easily remove decay heat even if it has a plurality of reactor pressure vessels. It is something.

[Means for Solving the Problems] In order to achieve the above object, the present invention accommodates a plurality of reactor pressure vessels in a pressure suppression type reactor containment vessel, and provides On the other hand, a suppression chamber having the water volume and space for one unit is shared.

[Function] According to the above configuration, since a suppression chamber having the water volume and space volume of one reactor pressure vessel is shared by multiple reactor pressure vessels, only the volume inside the pedestal in which the pressure vessel is installed is increased. There is no need to increase the size of other parts so much that even if a plurality of pressure vessels are installed together, the reactor containment facility can be made compact and decay heat can be easily removed.

[Examples] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIGS. 1(A) and 1(B) show the first reactor containment facility of the present invention.
As shown in the figure, in the nuclear reactor containment facility 0 of this embodiment, two reactor pressure vessels 2 are provided within a reactor containment vessel 11. These two pressure vessels 2 are inserted and fixed into a pedestal 12 formed in an oval shape. The inside of this pedestal 12 is partitioned by double partition walls 14 having a passage 13 in part, and dry well sungs 15 are provided at both ends between these partition walls 14, respectively. That is, two bedestels 12 are integrally formed for two pressure vessels 2. In addition, 16 in the figure is an ascending/descending staircase. Further, the pedestal 12 is surrounded by a suppression champara that accommodates the suppression pool water W. The amount of pool water W in this suppression Champara and the space volume above it are set to values that can cope with hypothetical accidents for the two pressure vessels 2, and are shared by the two pressure vessels 2. It is supposed to be done.

Specifically, a pressure relief pipe 7 branched from each pressure vessel 2 to a main steam pipe 17 extending to a turbine (not shown) via a safety valve 18 is connected to one suppression chamber for two units. It is immersed in Para's pool water W.

That is, the number of protection units is one for every two pressure vessels 2.

In the figure, 19 is an upper slab, 20 is a diaphragm floor, and 21 is an upper dry well formed between these.

Next, the operation of the first embodiment will be described.

In this embodiment, the pressure suppression type nuclear power containment vessel 11
A suppression chamber 5 has two nuclear pressure vessels 2 installed therein, and the amount of pool water W and the space volume above it are set so as to correspond to one unit for these two pressure vessels 2.
is shared.

As a result, only the volume inside the pedestal 12 in which the pressure vessel 2 is installed is increased, and only one protection unit is required. Therefore, even if two pressure vessels 2 are BFBed, if the removal of decay heat in the event of a hypothetical accident relies on the pool water W of the suppression Champara, one reactor containment vessel 11 for two conventional nuclear pressure vessels The reactor containment facility 0 can be made compact since the size of the containment vessel 11 is approximately the same as in the case where the nuclear reactor containment facility 0 is used. In particular, in the first embodiment, since the two bedestels 12 are integrally formed with the two pressure vessels 2, the cross-sectional area of the structure is increased and the earthquake resistance is improved. , ascending/descending stairs 16 and dry well sun 11
5th class space can also be easily secured.

FIG. 2 shows a second embodiment of the nuclear reactor containment facility of the present invention. As shown in FIG. Two pedestals 12a and 12b are provided in one containment vessel 11, not integrally with each other but separated and covering each pressure vessel 2, respectively.

In this embodiment, the earthquake resistance is inferior to that in the first embodiment, and separate spaces are required for the ascending and descending stairs 16, dry well sun 115, etc., but the other configurations are basically the same. To some extent, this embodiment exhibits the same effects as the first embodiment.

[Effects of the Invention] In summary, according to the present invention, a reactor containment facility having a plurality of reactor pressure vessels can be made compact, and the decay heat can be easily removed, which is economical. Demonstrates the excellent effect of

[Brief explanation of drawings]

FIG. 1(A) is a side sectional view showing a first embodiment of a nuclear reactor containment facility of the present invention, and FIG. 1(B) is a line BB in FIG. 1(A).
2 is a cross-sectional view showing a second embodiment of the nuclear reactor containment facility of the present invention, and FIG. 3 is a cross-sectional view showing a conventional reactor containment facility. In the figure, 2 is a reactor pressure vessel, 5 is a suppression chamber, 10 is a reactor containment facility, and 11 is a reactor containment vessel.

Claims (1)

[Claims] 1. A pressure suppression type reactor containment vessel houses multiple reactor pressure vessels, and these multiple reactor pressure vessels share a suppression chamber with the water volume and space volume of one unit. A nuclear reactor containment facility characterized by: