JPH0980185A - Diaphragm floor structure of reactor containment vessel and support structure of reactor pressure vessel - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a support structure for a reactor pressure vessel, which simplifies the structure of the upper part of the pedestal and simplifies the engagement between the pedestal and the diaphragm floor, and can shorten the installation period. is there. A diaphragm floor having an inner portion placed and supported on an upper surface of a top portion of a cylindrical pedestal, and an outer portion supported by a plurality of columns, and an inner end surface of the diaphragm floor, It has a skirt support member for supporting the skirt of the pressure vessel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diaphragm floor structure for a containment vessel and a support structure for a reactor pressure vessel.

[0002]

2. Description of the Related Art A conventional diaphragm floor structure for a containment vessel and a support structure for a reactor pressure vessel are, for example,
The configuration is as shown in FIG. In FIG.
1 is a building made of reinforced concrete, and is a reactor containment vessel 2
(Hereinafter, referred to as "container"), reactor pressure vessel 3 (hereinafter referred to as "pressure vessel"), shielding wall 5, and the like are housed. A skirt 4 is annularly attached to the lower portion of the pressure vessel 3. Reference numeral 5 is a shielding wall arranged so as to surround the pressure vessel 3, 6 is a cylindrical pedestal standing on the foundation (not shown) of the building 1, and 7 is a pedestal 6.
Similarly to the above, it is a pillar erected on the foundation of the building 1.
Reference numeral 8 denotes an annular diaphragm floor provided so as to partition the suppression chamber 15 and the dry well 16 from each other. The beam member 9 made of steel and the floor member 1 made of reinforced concrete are used.
0. A skirt support member 11 is provided on the inner side surface of the top of the pedestal 6. The pressure vessel 3 is attached and supported by a through bolt 12 on a skirt support member 11 via a skirt 4. The inner part of the beam member 9 is attached to the outer part of the top of the pedestal 6, the outer part is supported by the support column 7, and the mating part with the pedestal 6 is supported by the bracket 13. Further, the reinforced concrete floor member 10 arranged between the beam members 9 is arranged so that a part of the inside thereof overlaps with the upper surface of the outside of the top of the pedestal 6.

[0003]

However, in the conventional diaphragm floor structure of the reactor containment vessel and the support structure of the reactor pressure vessel shown in FIG. 2, the inner side of the beam member 9 of the diaphragm floor 8 is the pedestal 6. Is attached to the outer side of the top of the pedestal 6 and the mating portion with the pedestal 6 is supported by the bracket 13, and the floor member 10 is disposed so as to overlap with the upper surface of the outer side of the top of the pedestal 6. Not only the structure of the pedestal 6 becomes complicated, but also the structure of the connecting portion between the diaphragm floor 8 and the pedestal 6 becomes complicated, which makes it difficult to install the diaphragm floor 8.

Since the pressure vessel 3 is supported via the skirt 4 on the skirt support member 11 provided on the inner side surface of the top of the pedestal 6, the structure of the pedestal 6 is the same as that of the diaphragm floor 8. There was a problem that it became complicated.

The present invention has been devised in view of the above problems, and simplifies the structure of the upper part of the pedestal and simplifies the engagement between the pedestal and the diaphragm floor.
Moreover, it is an object of the present invention to provide a diaphragm floor structure of a reactor containment vessel and a support structure of a reactor pressure vessel that can reduce the installation period.

[0006]

In order to achieve the above object, according to a first aspect of the present invention, it is provided between an inside of a reactor containment vessel and a pedestal provided upright in the reactor containment vessel, An annular diaphragm floor partitioning the inside of the reactor containment vessel into an upper dry well and a lower suppression chamber, the inner part being placed on and supported by the top surface of the top of a cylindrical pedestal, and the outer part being It is supported by multiple columns.

According to a second aspect of the present invention, the dry well is provided between the inside of the reactor containment vessel and the pedestal provided upright in the reactor containment vessel, and the inside of the reactor containment vessel is provided with an upper dry well and a lower suppression chamber. A diaphragm floor of an annular shape that is partitioned into and a diaphragm floor in which the inner portion is placed and supported on the top surface of the top of the cylindrical pedestal,
A skirt support member is provided at an inner end of the diaphragm floor and supports a skirt of the reactor pressure vessel.

According to the support structure for the diaphragm floor of the containment vessel and the pressure vessel described above, the inner side of the diaphragm floor is placed and supported on the top surface of the top of the cylindrical pedestal, so that the diaphragm floor and the pedestal are supported. No bracket is required at the connecting portion of and the connection between the pedestal and the diaphragm floor can be simplified. Further, since the pressure vessel is supported by the diaphragm floor via the skirt support member and the diaphragm floor is placed on the top surface of the top of the pedestal, the structure of the upper part of the pedestal can be simplified.

[0009]

Preferred embodiments of the present invention will be described below with reference to the drawings. The same members as those of the conventional one will be described using the same reference numerals. FIG.
FIG. 3 is a front sectional view showing a diaphragm floor structure of the reactor containment vessel and a supporting state of the reactor pressure vessel.

In the figure, reference numeral 1 denotes a building made of reinforced concrete, which houses a containment vessel 2, a pressure vessel 3, a shield wall 5, and the like. A skirt 4 is annularly attached to the lower portion of the pressure vessel 3. Reference numeral 5 is a shielding wall arranged so as to surround the pressure vessel 3, 6 is a cylindrical pedestal standing upright on the foundation (not shown) of the building 1, and 7 is the same as the pedestal 6 It is a pillar standing on the foundation of. 8 is suppression chamber 15 and dry well 1
6 is an annular diaphragm floor provided so as to partition the space between the diaphragm floor and the diaphragm. The diaphragm floor 8 has an inner portion mounted on the top surface of the top of the pedestal 6 and an end portion of the inner portion protruding from the inner portion of the pedestal 6, and an outer portion thereof supported by a column 7. Has been done. The diaphragm floor 8 is composed of a plurality of steel beam members 9 and a reinforced concrete floor member 10. An inner portion of the floor member 10 closes the space between the beam members 9 with a connecting member (not shown) having a box-shaped cross section. 11
Is a steel skirt support member having a box-shaped cross section, and is formed in an annular shape. The pressure vessel 3 is mounted on and supported by the skirt support member 11 via the skirt 4 with through bolts 12. Reference numeral 14 denotes a bracket attached to the inner side of the pedestal 6 and supports the inner end of the beam member 9 of the diaphragm floor 8.

[0011]

As described above, according to the present invention, the inner portion of the diaphragm floor is placed and supported on the upper surface of the top of the cylindrical pedestal, and the outer portion is supported by the plurality of columns. Therefore, the structure of the upper part of the pedestal can be simplified, and the structure of the upper part of the pedestal can be simplified because the pressure vessel is supported through the skirt support member provided on the inner end face of the diaphragm floor. At the same time, the pedestal and diaphragm floor can be simplified in connection with each other, and the installation period can be shortened. Therefore, the plant construction period can be shortened, which is an excellent effect.

[Brief description of drawings]

FIG. 1 is a front cross-sectional view showing a diaphragm floor structure of a reactor containment vessel of the present invention and a supporting state of a reactor pressure vessel.

FIG. 2 is a front sectional view showing a diaphragm floor structure of a conventional reactor containment vessel and a supporting state of a reactor pressure vessel.

[Explanation of symbols]

 1 Building 2 Containment Vessel 3 Pressure Vessel 4 Skirt 5 Shield Wall 6 Pedestal 7 Pillar 8 Diaphragm Floor 9 Beam Member 10 Concrete Floor Member 11 Skirt Support Member 12 Through Bolt 14 Bracket 15 Suppression Chamber 16 Drywell

Claims (2)

[Claims] 1. A reactor is provided between the inside of the reactor containment vessel and a pedestal provided upright in the reactor containment vessel, and divides the inside of the reactor containment vessel into an upper dry well and a lower suppression chamber. An annular diaphragm floor, the inner part of which is placed and supported on the top surface of the top of a cylindrical pedestal, and the outer part of which is supported by a plurality of columns of a reactor containment vessel. Diaphragm floor structure. 2. The reactor is provided between the inside of the reactor containment vessel and a pedestal provided upright in the reactor containment vessel, and divides the inside of the reactor containment vessel into an upper dry well and a lower suppression chamber. An annular diaphragm floor, the inner side of which is placed and supported on the upper surface of the top of the cylindrical pedestal, and the inner side end of the diaphragm floor, which is provided at the inner end of the diaphragm floor and supports the skirt of the reactor pressure vessel. A support structure for a reactor pressure vessel, comprising: