JPH027437B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for receiving and containing hot liquids, particularly liquid metals.

For example, it has been proposed to use liquid metals such as sodium and potassium as coolants in fast breeder reactors.

The reactor vessel, heat exchanger, steam generator, etc. that make up the cooling system are installed in separate rooms of the building, and are connected to each other by piping, but the vessels and piping are If it breaks, high-temperature sodium will leak out and fall onto the floor of the chamber.

Therefore, in order to protect the concrete floor from the leaked high-temperature sodium and to quickly recover the leaked sodium, a steel tray is generally provided on the upper surface of the floor.

Conventionally proposed saucers are composed of a horizontal plate with a wide bottom, but they have the following problems.

In other words, the leaked sodium has a very high temperature, so the bottom of the saucer that directly receives it exhibits large thermal expansion, whereas the floor below it is relatively low-temperature, and there is a gap between the bottom of the saucer and the floor. Relative displacement occurs, which complicates the sliding mechanism.

Furthermore, since the containers and the like are fairly large structures, the chambers and, by extension, the saucers are also large, making manufacturing and installation work at construction sites difficult and requiring a large number of man-hours.

Furthermore, the high-temperature sodium that falls into the saucer spreads over the entire bottom, making recovery time-consuming and prolonging intense exothermic reactions.

The present invention has been made in view of the above-mentioned problems of the conventional ones, and includes arranging a large number of upwardly open cylindrical receiving containers on the floor, closing the openings of the receiving containers with a plate, and centering the axis of the bottom surface of the receiving containers. The idea is to allow the receiving container to undergo thermal expansion in the radial direction by means of a supporting member that pivots the parts, and to store the leaked and fallen sodium in the container near the point of fall, thereby solving the above-mentioned problems. .

Hereinafter, the present invention will be explained based on illustrated embodiments.

In FIGS. 1 and 2, side walls 1, 2, 3,
A perforated plate 12 is provided substantially horizontally above the floor 5 of the chamber 10 surrounded by the chamber 10. Circular holes 14 are bored in the perforated plate 12 at a square pitch (15 holes are shown in Fig. 1, but any number can be selected as needed, and the arrangement can be any suitable arrangement such as staggered pitch).
Cylindrical containers 16 are arranged upright in alignment with each of the containers.

As shown in FIG. 3, which is a partially enlarged sectional view, the periphery of the upper opening 18 of the container 16 is closely joined to the perforated plate 12, and as shown in FIG. Support member 2 between floor 5
0 is set. The support member 20 includes a seat 23 fixed to the upper surface of the floor 5 and a protrusion 25 protruding from the bottom surface 21, and the protrusion 25 is loosely fitted into the seat 23.

Furthermore, a ridge 27 is formed on the periphery of the perforated plate 12, as shown in FIG. 3, and this ridge 27 is in contact with the wall 2.

In the structure described above, when high-temperature sodium leaks from a container (not shown) or the like, it falls onto the perforated plate 12 and container 16 located below.

The fallen high-temperature sodium flows into a container 16 near the falling point, and when that container 16 is full, it flows into another adjacent container 16. Sodium flows into and is contained in the number of containers 16 corresponding to the amount of leakage.

A gutter or the like may be formed in the perforated plate 12 so as to communicate the openings 18 of adjacent containers 16 to facilitate the above-mentioned inflow.

The contact area between the high temperature sodium flowing into the container 16 and the air in the chamber 10 is limited by the horizontal cross-sectional area of the container 16, and exothermic reactions and the like occur only on that surface.

Due to the inflow of high temperature sodium, the container 16
It expands thermally, but it is symmetrical about its axis, so
Almost no relative displacement occurs between the protrusion 25 and the floor 5, and on the other hand, when the container 16 swings horizontally due to an earthquake or the like, it is supported by the seat 23.

According to the embodiment described above, since no relative displacement occurs between the axis of the container 16 into which the leaked high-temperature sodium has flowed and the floor 5, a special sliding mechanism is not required, and the structure is simplified and the container 16 Even if it is manufactured in a factory, there is no problem in transportation, and the installation work is extremely simple compared to conventional products.

Furthermore, the leaked high-temperature sodium flows into the limited container 16 and does not diffuse, and its contact with air is limited, so that its exothermic reaction and the like can be greatly suppressed.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention, and FIG.
The figure is a sectional view taken along the line - in FIG. 1, and FIGS. 3 and 4 are partial sectional views each showing a part of FIG. 2 on an enlarged scale. 5...Floor, 10...Room, 12...Perforated plate, 14
... circular hole, 16 ... container, 18 ... opening, 20 ...
...Supporting member.

Claims (1)

[Claims] 1. A perforated plate extending almost horizontally at the bottom of a chamber where equipment handling high-temperature liquid metals is installed, and arranged in parallel below the perforated plate in alignment with each hole in the perforated plate. a plurality of cylindrical receiving containers and a support member interposed between the bottom bottom surface of each of the receiving containers and the floor of the chamber and pivotally supporting the axis of the bottom bottom surface; A device for receiving leaked high-temperature liquid metal, characterized in that its peripheral edge is tightly joined to the perforated plate.