JPS6014197A - Method of installing nuclear reactor containing vessel - 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] [Technical field of invention] This invention leaves only one method for installing a reactor containment vessel.

[Technical background of Hikari]

, g1 diagram shows a conventional boiling water reactor,
FIG. 2 is a partially cutaway side view showing the reactor containment vessel installed in the reactor building.

The reactor containment vessel 1 is installed within the reactor building 3.

This reactor shed 3 is provided with a mat 5, a blowout wall 7 provided on the upper part of the mat 5 and surrounding the reactor containment vessel 1, and provided outside 1111 of the shielding wall 7 on the upper part of the mat 5. It consists of a circumferential wall 9 and the like, and grout 11 is filled between the shielding wall 7 and the reactor containment vessel 1.

The reactor containment vessel 1 includes a bottom course [3], a lower spherical shell 1 stage 15, a lower spherical shell 2 stage [7], and a vent course t9, which are sequentially assembled by welding from the bottom to the top, and the upper part of the vent course 19. The cylindrical portion 21 and the upper sphere SiB are successively connected to the bath, and the reactor containment vessel head is removably disposed above the upper spherical shell β. these,
The cylindrical portion 21, the upper spherical shell n, and the reactor containment vessel 5 are referred to as the "upper element of the reactor containment vessel." In addition, a torus 4 is constructed in the reactor containment vessel 1 via a vent pipe n. This torus 29 is installed below the reactor 6 vessel 1, and forms a suppression chamber inside.

Additionally, a reactor pressure vessel 31 is located inside the reactor containment vessel 1.
is provided, and this reactor pressure vessel 31 is connected to a pedestal 33
is supported by The k-destal J3 is erected inside the reactor containment vessel 1, reinforced with internal concrete 37, and held firmly.

The grout 11 has a mat 5 as shown in FIG.
The sand cushion 39 has a height from the upper part of the spherical shell 17 of the F section to a position near the bottom of the horizontal bath contact with the second spherical shell 17 and the vent course 19, a41A, and a sand cushion 39 is provided on the upper part. This sand cushion 9 is in contact with the outside of the hot tangent line 41A and is provided in an annular shape along the bath tangent line 41A.
The sand cushion 39 is fixed to concrete by an upper shielding wall 7b formed above the lower shielding wall 7a. The shielding wall 7 is formed into a groove by these lower and upper shielding walls 7a and 7b.

Further, the internal concrete 37 is cast from the bottom of the bottom course [3] to the vicinity above the weld line 41A. Of these, the annular portion that contacts the inside of the weld line 41A is the internal concrete remainder 43. Q. The code 41B is the welding point of the bottom course [3, lower ball 1st stage [5], and 2nd stage 17.

Next, the installation process of the reactor containment vessel will be explained with reference to FIG. 6 (4). First, the mat 5 of the reactor building 3 is formed by reinforcement work and concrete pouring work. Next, concreting work for the lower part 7a of the shielding wall 7 and the circumferential wall 9 is started, and at the same time, the bottom course [3 is assembled on the mat 5. After the bottom course 13 is assembled, one stage of lower spherical shells [5] is sequentially welded and assembled to the upper part of the bottom course [3], and then two stages 17 of the lower spherical shells 17 are sequentially welded to the upper part of the first stage of lower spherical shells [5]. After the lower spherical shell 2 stage 17 is assembled, this lower spherical shell 2
Assemble the vent course 19 on the top of the stage [7], and perform 115 local leak tests on the welding points 41B of the bottom course 13F spherical shells 1st and 2nd stage [5, 17].

This local leak test 45 is performed by covering the welding location 41B with a test channel and pressurizing the inside of the test channel to a predetermined pressure.

As a result, the pressure resistance and leakage of the welded portion 41B are inspected.

After the vent course 19 is assembled, the cylindrical part 21 is welded to the upper part of the vent course 19, the upper spherical shell is welded to the upper part of the cylindrical part 21, and the reactor containment vessel head 5 is welded to the upper part of the upper spherical shell passage. The upper elements are sequentially attached to form the upper part of the reactor containment vessel 1.

In parallel with the assembly work of the upper element of any reactor containment vessel 1, after the local leak test 45 is completed, grout 11 is injected and filled into the lower part of the reactor containment vessel. grout 1
Along with the solidification of 1, the assembly of the pedestal 33 and the pouring of internal concrete 37 (excluding the remaining internal concrete 43) are carried out.

These upper elements of the reactor containment vessel 1 (21.3%
25) After the assembly, filling with grout L1, assembling the pedestal 33, and placing the internal concrete 37, an overall leak test 47 is performed.

This total leakage test 47 is performed on all welding and sri locations except for the bath junction location 41B.

After the overall leak test 7, the reactor containment vessel 1 is exposed to 1i'
In addition to painting 19, internal concrete remains iE
J&L3 K: Place concrete. This:l:
27 After pouring the IJ-t, work inside the reactor containment vessel 51 (installation of reactor pressure valley g731, etc.) is carried out. After the outer surface coating 49, a sand cushion 39 is provided to form the upper shielding wall 7b of the polar shielding wall 7.

[Problems with background art]

However, in the conventional method of installing the reactor containment vessel 1 as described above, the sand cushion 39 is provided after the overall leak test 47, and then the concrete placement work for the upper shielding wall 7b is performed.

The above-mentioned overall leak test is performed after the reactor containment vessel 1 has been roped. Therefore, the start time of the sand cushion 39 installation work is delayed, the completion of the shielding wall 7 is delayed, and the period between construction of the reactor building 3 becomes longer.

In addition, the installation work of Sand Cushion 39 is done by Cloud 11.
Since this is done after the sand cushion 39 is completed, the sand cushion 39 must be installed in a narrow space.

Therefore, the installation work of the sand cushion 39 becomes complicated and troublesome, and there is also a disadvantage that work efficiency and work efficiency are reduced.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned facts, and an object of the present invention is to provide a method for installing a reactor containment vessel that can shorten the construction period of a reactor building.

[Summary of the invention]

In order to achieve the above object, the method for installing a reactor containment vessel according to the present invention is to assemble the bottom course, one stage of lower spherical shell, two stages of lower spherical shell, and vent course from below in order to install the lower part of the reactor containment vessel. After assembly, in parallel with the work of sequentially assembling the upper elements of the reactor containment vessel above the vent course, a leak test of the welded part between the vent course and the two lower spherical shells was performed, and after this leak test, the above This is to perform the installation of sand cushions to the welded parts, and by completing the leak test and sand cushion installation during the assembly of the upper part of the reactor containment vessel, the assembly of the reactor containment vessel is completed. 4 Early on,
This will complete the shielding wall for the first reactor building.

[Spring sword fruit pongee row]

Figures 3 and 4 are diagrams showing a reactor containment vessel and a reactor building completed by applying the reactor containment vessel cave-in method according to the present invention. In this figure, the same reference numerals as in the conventional example are given to the same parts as those in the conventional example, and the 1zt markings are omitted.

The grout 61 is made up of an inner cloud 61a and an outer grout 61b.
61 b i is located on the outer periphery side in contact with the inner grout (il a), has a substantially trapezoidal shape with a 14-note surface, and is formed in the reactor containment vessel 1 in a cylindrical or torus shape. The grout 61b covers the outside of the lower spherical shell 2 stage L7, and its height is the distance from the mat 5 to the vicinity of the lower part of the welding line 41A.

Above this outer cloud 61b, a sand cushion 3
9 is provided. The attachment of the sand cushion knee 39 will be explained based on FIG. 5.

A bat 63 is fixed to the outer surface of the second stage of the F section spherical shell at an appropriate position in the secondary direction, and a support member 65 is fixed to this bat 63. A frame 69 is supported by the support member 65 via a support 67 . The frame ti9 has a cross-sectional shape, faces the outside of the welding line 41A, and is formed into four shapes along the bath tangent line 41A. Sand 70 is filled into the space surrounded by the frame body 69, the two lower spherical shells 17, and the vent course 19, and the installation of the sand cushion 39 is completed.

A portion of the support member 65 and the support 67 will be placed in concrete after 1,000 yen.
The rest of the frame ( ) 9 and the support 67 are also buried in the upper shielding wall 7b and fixed in concrete.

Next, the installation method of the nuclear reactor 4b reactor will be explained based on Rule 61XBn). The same bow is used in steps 0~) and +j;4 (in the same figure).

First, the mat 5 of the reactor building 1 slide 3 is formed by reinforcing strips, concrete pouring sections, and hills. Then lower g
liiijY47 h and circle) 18λ pain 9 concrete placement begins. In parallel with this concrete pouring, bottom course 13 (r7) is assembled on mat 5.

Assembling bottom course 13, bottom course [upper f of 3]
-F section 1 shell seeking 1 stage 15 to iB, and this lower spherical shell 1
Assemble the two lower spherical shells to the top of the stage [5] by contacting the lower spherical shells [7 with the next bath 11a]. After assembling the 32nd stage 17, the upper fI
V) When the bent course 19 can be seen, the bottom course t3, the lower bulb 11-length L5, and the same second stage [bath contact of 7; local leak test 45 of pro-eutectoid 41B are carried out). The F section covered wall 7a has been completed at the end of the local leak test 45.

After the local leak test 45 is completed, the assembly surface of the pedestal 33 is poured (excluding the remaining internal concrete 43) 37, and the inner grout 1a is formed.

On the other hand, after assembling the vent course I9, the cylindrical part 21 is attached to the upper part of this vent course 19, the upper spherical shell is assembled to the upper part of this cylindrical part 2J, and the nuclear reactor is attached to the upper part of the upper spherical shell. Attaching the containment vessel head 5, the reactor containment vessel 1
Assemble the top part. In parallel with the assembly work of sequentially assembling the upper elements of the reactor containment vessel 1, a local leak test 71 of the welding ify'J41A is performed.

This local leak test 71 is performed in the same manner as the local leak test 45. During the assembly of the upper element of the reactor containment vessel after the completion of the local leak test 71, the remaining internal concrete 43 is poured, and a sand cushion,
39 is attached to the outer periphery of the reactor containment vessel 1. During assembly of the upper element of the reactor containment vessel, after the sand cushion 39 is installed, the outer grout 61b is filled. A part of the support 07 for attaching the sand cushion 39 and the support member 65 are buried in the outer grout 61b when it is filled.

After completing the assembly of the upper part of the reactor containment vessel and the completion of concrete pouring of the remaining internal concrete, 11
11 Whole leak test 1 after filling work of grout I)■b
Rl 3 now. This entire leak test 13 is performed on all welding locations including the welding locations 41B and the welding locations 41B, which have already been leak tested.

After completion of the overall leak test 73, work inside the reactor containment vessel J1 (installation of the IJit reactor pressure volume Ay Jl, etc.) was carried out, and the reactor containment vessel 10'IIF, surface painting and
Perform +9. This exterior painting・+9 upper cover wall 7
form b. The first length notation 39, the remainder of the support 67 and the frame 1+9 are attached to the upper cover wall 7b.
It is buried in concrete, solidified, and then removed to become a wooden structure.

According to the above-mentioned "Actual packing 1", the upper part of the reactor 4b delivery vessel (2
1, I, 25)'' is a local leak test of 11A of welding 11A) in the package, and since we are also attaching Zandokushosho 39, the reactor grade g13' (r ew
After assembling 1 and performing a full leak test/3, the salivary wall 7 can be quickly constructed. Therefore, in order to shorten the construction (υ) for continuous use of the nuclear reactor, the grout 61 can be replaced with the inner grout Ula in the center and the outer grout l- formed below the mounting position of the sand cushion 39. Since the sand cushion 39 is installed after filling the k'3 side grout 61a and then filled with the outer grout o1b, the sand cushion 39 can be installed in a large open space. Workability and pear safety can be improved.

Furthermore, since the local leak test of the weld line 41A) '71 is carried out during the assembly of the upper part of the reactor containment vessel, concrete placement of the remaining internal concrete 43? It can be completed during the upper assembly of the reactor containment vessel, and the reactor pressure vessel 31
Construction work inside the reactor containment vessel 2, such as installation of personnel, can be started at an early stage immediately after the overall leak test 73.

〔Effect of the invention〕

As described above, according to the method for installing each containment vessel in the reactor according to this specification, in parallel with the sequential assembly of the upper elements of the reactor containment vessel, the vent course and the lower spherical shell two stages are installed. Since we will perform a leak test on the bath contact area between the reactor and the welded part 43 after the leak test, we will conduct a leak test on the welded part 43 of the reactor building. The shielding wall can be completed, and therefore the construction period for the continuous construction of the reactor building can be shortened by 16 minutes.

[Brief explanation of the drawing]

Figure 1 shows the conventional reactor containment. :'t is a partially cutaway sacral view showing the 11 parts installed in the reactor building.
Figure J and Figure 3 show the nuclear reactor containment vessel and nuclear detached house completed using the installation method of the nuclear reactor according to the present invention. , Figure 4 shows the lower part of the reactor containment vessel in Figure 3'? f: j
) j Figure (B) is a sequence diagram showing the installation process of the reactor containment vessel according to the present invention, and Figure (B) is a sequence diagram showing the installation process of the conventional reactor containment vessel. Yes. l... Reactor containment vessel, 3... Reactor building, E3.
・Bottom course, [5... F club ball 1st stage, [7...
・F Club Atsushi 2nd tier, [9... Bent course, 21...
Cylindrical part, 23-... Upper spherical shell, stone... Reactor containment vessel head, :j9... Sand cushion, 41A...
Bath tangents 1, 13...Remaining internal concrete, 61...
・Grout, 61a...inner grout, (ilb...
・Outside grout, 71...Local leak test. Applicant's agent Hisashi Hatano

Claims (1)

[Claims] (1) After assembling the lower part of the reactor containment vessel by sequentially assembling the bottom course, the first stage of lower spherical shell, the second stage of lower spherical shell, and the vent course from below, the reactor is stored above the vent course. In parallel with the work of sequentially assembling the upper elements of the container, a leak test was conducted on the bath contact area between the vent course and the two lower spherical shells, and after this leak test, the above-mentioned
A method for installing a nuclear reactor containment vessel, which includes the step of attaching a sand cushion to a rivet part. 2. Filling the reactor containment vessel with grout up to the vicinity of the weld line below the outer side is performed in parallel with the upper element assembly work of the reactor containment vessel, and the grout filling operation is carried out on the bottom course of the reactor containment vessel. and inner E11 grout formed above the first stage of the lower spherical shell, and the lower spherical shell 2.
and an outer grout formed below the step, and after filling the inner grout, the sand cushion is attached, and then the outer grout is filled. Method. 3. The work of placing internal concrete, which is placed inside and above the reactor containment vessel up to near the top of the front weld line,
The work of placing the internal concrete is carried out in parallel with the assembly of the upper element of the reactor containment vessel, and the work of placing the remaining internal concrete in contact with the welding portion is started after the completion of the leak test, and the work of placing the internal concrete is started after the completion of the leak test, and The method of installing a reactor containment vessel according to claim 1, which is completed by the time the upper element assembly of the reactor containment vessel is completed.