JPS589092A - Method of filling grout concrete to under portion of reactor container - 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 an improvement in a method of filling the lower part of a nuclear reactor containment vessel with grout concrete.

Regarding the installation of the reactor containment vessel, General C1II/
In II, after installing the reactor containment vessel 1t on the base plate 8 of the reactor building 2, a method was adopted in which grout concrete 4 was filled between the base plate 8 and the bottom liner plate 1a of the reactor containment vessel 1. It will be done.

In this regard, the installation of the reactor containment vessel 1 is the same whether it is installed in the case shown in Figure 7, in which the part is dug, or in the case shown in Figure 2, in which the part is not dug. By the way, in this case, since the bottom liner plate la of the reactor containment vessel 1 has generally been flat throughout, there is a risk that the air that is released during grouting may remain as air voids in the grout concrete 4. There was found.

This invention has been made in consideration of the above points, and provides a method for filling grout concrete into the lower part of a nuclear reactor containment vessel, which allows dense filling of grout concrete by reliably removing air during grouting. The main structural feature of the present invention is that during grouting work, an inclined pipe is attached to the bottom liner plate l of the reactor containment vessel 1, and the high part of the inclined bottom liner plate la is The main point is that the opening of the air bleed tube 8 is located at the bottom. As a result, the air generated during one rounding can be collected in a certain area, circulated through the grout concrete through the air vent pipe, and released to the outside, so air can be removed from the grout concrete with almost no air voids.

In this case, during the grouting work, it is also possible to fill the concrete by making a hole for grouting in the bottom liner plate (1a) of the containment vessel (1).
The following method can also be adopted: ◎In other words, as shown in Figure 3, grout concrete is placed on the side of the reactor containment vessel support ring girder b located 1 m below -4 supply channel 6
This is a method of providing Piping is normally used as this supply channel, but it is also possible to partially embed it in the grout concrete 4. For example, pulp may be placed in the reactor containment vessel support ring girder 5. Then, turn the pulp into a lump and shell 8! ? Mercenary pipe 6
It is possible to remove the tube m after grouting is completed, while embedding it in the other tube 6brt grout concrete 4 located below the bottom liner play. However, in either method, in this invention,
For example, as shown in Figure 113 and Figure 1, by making the peripheral part higher than the center and providing radial unevenness in the local direction, air voids during grouting can be reduced in certain parts (high places). 2) and let it escape to the side of the storage capacity ail through the air bleed pipe 81. Here, in order to arrange the opening of the air vent tube 8 T, it is also effective to provide a protrusion 9 on the corresponding portion of the bottom liner plate 1m.

[Brief explanation of drawings]

FIG.
The figures and references show one embodiment of the present invention, and FIG. 3 is a longitudinal section v! J1 4th! The figure is a cross-sectional view taken along line 2-2 in Figure 5, and Figure 111 is a longitudinal cross-sectional view showing a modification of the present invention. 1...Reactor containment vessel, lm...Bottom liner plate, 3...Reactor building, 8...
・・・・Foundation board, Number ・・・・Grow}Concrete, ８・・・・・・ Air bleeder Kaide Hitoshi Shimizu Construction Co., Ltd.

Claims (1)

[Claims] After installation on the foundation plate of the reactor containment vessel 1IIrtTL sub-reactor building, when filling grout concrete between the foundation plate and the bottom liner plate of the reactor containment vessel, the bottom liner plate is sloped and its A method for filling a lower part of a reactor containment vessel with grout concrete, characterized by arranging a pipe mouth having air venting and grout concrete circulation functions at the lower part of a high part of an inclined bottom liner plate.