JPS6338111B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a nuclear reactor containment vessel that houses a nuclear reactor pressure vessel.

Conventionally, nuclear reactor containment vessels, such as over-under type reactor containment vessels, have been constructed as shown in FIGS. 1 and 2. That is, 1 is the main body of the containment vessel, which is made of reinforced concrete, for example;
It has pressure resistance and radiation shielding ability. A liner 2 is stretched over the inner surface of the containment vessel body 1 to provide airtightness. The inside of the containment vessel main body 1 is divided into upper and lower sections by a diaphragm floor 3, with a dry well 4 formed in the upper part and a suppression chamber 5 formed in the lower part. A pedestal 6 is erected within the containment vessel body 1, and a reactor pressure vessel 7 is installed on the pedestal 6. A heat shielding wall 8 is provided surrounding the reactor pressure vessel.
The upper end of this heat shield wall 8 is supported by the containment vessel main body 1 via support members 9, and is configured to support the horizontal load applied to this heat shield wall 8 in the event of an earthquake or the like. ing. By the way, these support members 9 have conventionally been provided horizontally between the outer periphery of the upper end of the heat shielding wall 8 and the inner peripheral surface of the containment vessel main body 1. For this reason, the rails 11 for the traveling of the hoist crane, which are used to attach and detach the main steam isolation valves 10 and the like, had to be provided below the support members 9 . . . . By the way, a certain distance is required from the rail 11 to equipment such as the main steam isolation valve 10 in order to lift and work on these equipment, and also to install an air conditioning duct. Therefore, when the rail 11 is disposed below the support members 9 as described above, the containment vessel main body 1 becomes higher by that much, which is disadvantageous in terms of seismic design. In addition, at the attachment part between the supporting members 9 and the containment vessel main body 1, as shown in FIG.
It is necessary to embed a relatively large supporting metal fitting 12 in the container body 1 to distribute and support the large horizontal load acting through the supporting members 9 to the main body 1 of the containment vessel. Further, in such a concrete reactor containment vessel, a flange member 14 for attaching the upper cover 13 must be separately formed and attached to the containment vessel main body 1. By the way, such a flange member 14 receives a large upward load when the internal pressure of the reactor containment vessel increases. For this reason, a large mounting bracket 1 is installed on the top of the containment vessel body 1.
5, and the flange member 14 needs to be attached to this mounting fitting 15. However, embedding such large fittings 15 and support fittings 12 complicates the reinforcement structure around them, so it is better to have fewer large fittings embedded in the containment vessel body 1.

The present invention has been made based on the above circumstances, and its purpose is to provide a reactor containment vessel that can effectively utilize the internal space, reduce its height, and improve earthquake resistance. It is in.

The present invention will be explained below with reference to an embodiment shown in FIGS. 3 to 6. In the figure, 101 is the main body of the containment vessel, which is strongly formed of reinforced concrete and has pressure resistance and radiation shielding ability. A liner 102 made of a steel plate is tightly attached to the inner surface of the containment vessel main body 101, and the liner 102 provides airtightness. The inside of this containment vessel main body 101 is divided into upper and lower parts by a diamond floor 103,
The upper part is formed into a dry well 104, and the lower part is formed into a suppression chamber 105. In addition, a pedestal 106 is erected at the center of the containment vessel main body 101, and this pedestal 106
A reactor pressure vessel 107 is installed above. Further, on this pedestal 106, a cylindrical heat shielding wall 10 is provided surrounding the reactor pressure vessel 107.
8 are erected. The reactor pressure vessel 107 and the heat shielding wall 108 are connected to a connecting member 109...
are connected via. Further, 110 is a main steam pipe, and a main steam isolation valve 111 is provided in the middle thereof. In addition, this containment vessel main body 101
A steel flange member 112 is provided at the upper opening of the upper lid 1.
13 is detachably attached. An annular mounting fitting 114 is embedded around the upper end opening of the containment vessel main body 101. The flange member 112 is attached to this mounting bracket 114, and when the internal pressure increases, the upward load acting on the flange member 112 is absorbed by the mounting bracket 114.
14 to the containment vessel main body 101. And the heat shield wall 10
A plurality of support members 1 are arranged upwardly from the upper end surface of 8.
15 are provided in a protruding manner, and the upper ends of these supporting members 115 are attached to the upper wall portion of the containment vessel main body 101, for example, to the above-mentioned mounting bracket 114. In addition, 11
6... connects these support members 115... to the heat shielding wall 108.
It is a mounting bracket for attaching to the upper end, and is embedded in the upper end of the heat shield wall 108. As shown in FIG. 5, these support members 115 are assembled in a continuous truss shape in the circumferential direction, and are configured to withstand loads in the circumferential direction.
Therefore, the horizontal load acting on the heat shielding wall 108 is received by the support members 115 located in a direction perpendicular to the direction of the load, and is transmitted to the containment vessel body 101. ing. Further, the upper end portions of the supporting members 115 are attached to the mounting fittings 114 via sliding mechanisms 117 . These sliding mechanisms 117 ... are composed of receiving members 117a... and sliders 117b..., and the receiving members 117a... have sliding grooves 117c...
is formed. And these receiving members 117
a... are attached so that their sliders 117b... all face in the radial direction. The sliders 117b are each slidably fitted into the sliding grooves 117c of the receiving members 117a,
The upper end of the support member 115...
It is attached to 17b. Therefore, these sliding mechanisms 117 are configured to transmit the circumferential load acting on the support members 115 to the containment vessel body 101, but not to transmit the radial load to the containment vessel body 101. Therefore, the structure is such that thermal deformation of the heat shielding wall 108 is relieved by sliding these sliders 117b in the radial direction. Further, an annular rail 118 is provided at the upper part of the containment vessel main body 101, and a hoist crane (not shown) used for installing and removing equipment such as the main steam isolation valve 111 is attached to this rail 118.
It is configured to run along 8.

In one embodiment of the present invention configured as described above, the reactor pressure vessel 107 and the heat shield wall 10 can be damaged by an earthquake.
8 is transmitted to and supported by the containment vessel main body 101 by support members 115 located perpendicular to the direction of this load. And in this case, the support member 115... is the heat shield wall 108
Since it is arranged upward from the upper end, the outer peripheral surface of this heat shielding wall 108 and the containment vessel body 101
There are no obstructive members between the inner surface and the inner surface. Therefore, the rail 118 can be provided at the top of the containment vessel main body 101, and the height of the containment vessel main body 101 can be reduced accordingly.
The earthquake resistance of 01 is improved. Further, since the support members 115 are provided to protrude upward in this way, the upper ends of these support members 115 are located around the upper end opening of the containment vessel main body 101. Therefore, the mounting fittings 114 that receive the loads of these supporting members 115 can be used in common with the mounting fittings that receive the loads of the flange members 112, and since only one such mounting fitting 114 is required, the structure of the containment vessel main body 101 is simplified, Construction costs can be reduced.

As detailed above, the reactor containment vessel according to the present invention includes a containment vessel main body made of concrete, a cylindrical heat shielding wall provided surrounding the reactor pressure vessel housed in the containment vessel main body, an annular mounting bracket that is embedded in the upper wall of the containment vessel body and supports a flange portion to which the upper cover of the containment vessel body is attached;
a support member that connects the upper end of the heat shielding wall and the annular mounting bracket and is assembled in a truss shape continuously in the circumferential direction, and a supporting member that is formed on either the annular mounting bracket and the support member and extends in the radial direction a slider having a sliding protrusion, and a sliding groove formed on the other of the annular mounting bracket and the support member and engaging with the sliding protrusion of the slider and extending in the radial direction. It is characterized by comprising a receiving member that allows relative sliding in the radial direction with the slider and restricts sliding in the circumferential direction. Therefore, the horizontal load that acts on the heat shield wall due to earthquakes, etc. is received by the containment vessel main body via the support member at a position perpendicular to the direction of action of this load. It can support loads in different directions. Since these support members are arranged upward from the upper end of the heat shield wall, there are no obstructive members between the heat shield wall and the containment vessel main body. Therefore, the space between this heat shielding wall and the containment vessel body can be used effectively by providing rails for hoist crane travel at the top of the containment vessel, and the height of the containment vessel body can be reduced by that amount. This improves earthquake resistance. Furthermore, in the present invention,
The mounting bracket embedded in the upper wall of the containment vessel body to support the flange to which the upper lid of the containment vessel is attached can also be used to support the support member, so the configuration can be simplified. .
Furthermore, thermal expansion in the radial direction can be absorbed while maintaining necessary functions at least within the sliding range between the slider and the receiving member, and a high thermal expansion absorption capacity can be provided. Furthermore, in the case of the present invention, since the support member is installed between a relatively short distance between the heat shielding wall and the upper wall of the containment vessel main body, the moment acting during an earthquake is also small.
The integrity of the structure can be effectively maintained, and the support member and various structures accompanying it can also be small-sized, thereby reducing the amount of material needed.

[Brief explanation of the drawing]

1 and 2 show a conventional example, with FIG. 1 being a longitudinal sectional view of the whole, and FIG. 2 being a longitudinal sectional view showing a part enlarged. 3 to 6 show one embodiment of the present invention, in which FIG. 3 is an overall vertical sectional view, FIG. 4 is a vertical sectional view showing a partially enlarged view, and FIG. 6 is a view of FIG. 5 in the direction of the arrow. 101... Containment vessel main body, 102... Liner, 1
07...Reactor pressure vessel, 108...Heat shielding wall, 11
2...Flange member, 113...Top lid, 114...Mounting metal fittings, 115...Supporting member, 117 ...Sliding mechanism.

Claims (1)

[Claims] 1. A containment vessel body made of concrete, a cylindrical heat shielding wall provided surrounding the reactor pressure vessel housed within the containment vessel body, and a containment vessel body buried within the upper wall of the containment vessel body. an annular mounting bracket that supports the flange portion to which the top cover is attached; a support member that connects the upper end of the heat shielding wall and the annular mounting bracket and is continuously assembled in a truss shape in the circumferential direction; A slider having a sliding protrusion formed on one of the supporting members and extending in the radial direction, and a sliding protrusion of the slider formed on the other of the annular mounting bracket and the supporting member. and a receiving member having a sliding groove extending in the radial direction and allowing relative sliding in the radial direction with the slider and restricting sliding in the circumferential direction. A nuclear reactor containment vessel characterized by: