JPH0471478B2 - - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention provides a method for constructing a nuclear power plant having a boiling water reactor having a reactor containment vessel equipped with a torus-shaped pressure suppression chamber. Regarding.

(Prior art) In general, the arrangement structure of a torus-type reactor containment vessel in a nuclear reactor building is as shown in the vertical cross-sectional view of Fig. It is fixed to the reactor building mats () 1 and () 4 with anchors (not shown), and the sides are attached to underground shield walls () 5 and ()
9. Surrounded by 12th grade shield wall on the 1st floor,
The bottom space is filled with concrete 8 and installed. The torus 2 is also fixed to the reactor building mat ( ) 1 with an anchor 2A, and a wall 6 rises from the reactor building mat ( ) 1 and surrounds the outside of the torus 2, and the wall 6 and the underground shield wall ( ) 9 A torus room 7 defined by the floor 10 of the first floor of the reactor building that connects the torus 2 and covers the upper part of the torus 2.
It is stored inside. A wall 11 on the first floor and a floor 13 on the second floor are arranged above the floor 10.

Conventionally, in the construction of such a structure, as shown in the process diagram in Figure 4, the first step was to build the reactor building
After this is completed, the anchor bolts of the torus 2 and the reactor containment vessel 3 are set. Next, the reactor building mat (2) 4 is placed, the underground shield wall (2) 5 is constructed, and the reactor containment vessel 3 is assembled. On the other hand, the wall 6 of the torus room is constructed in parallel, and once the underground shield wall ( ) 5 and the wall 6 of the torus room are completed, the torus 2 is carried into the torus room 7 and installed. After the installation of the torus 2 is completed in this way, a pressure test is performed together with the reactor containment vessel 3, which has been assembled previously. Next, the reactor containment vessel 3 is painted, the lower space of the reactor containment vessel 3 is filled with concrete 8, an underground shield wall (2) 9 is constructed, and then the first floor floor 10 is constructed. After this, the walls 11 on the first floor and the shield wall 12 on the first floor were constructed, and the floor 13 on the second floor was constructed.

(Problems to be Solved by the Invention) In the construction process described above, since the distance between the torus 2 and the wall 6 of the torus chamber is narrow, reinforcement work, formwork attachment and removal when constructing the torus chamber wall 6 are difficult. Since the torus 2 interferes with the scaffolding used for the work, the torus 2 cannot be carried in and installed until the wall 4 of the torus room is completed and the scaffolding is removed. For this reason, even if the assembly of the reactor containment vessel 3 is completed, the pressure test of the reactor containment vessel 3 cannot be carried out until the walls 6 of the torus chamber are completed and the carrying-in and installation work of the torus 2 is completed. Therefore, the work from the construction of the wall 6 of the torus room to the carrying-in and installation of the torus 2 became a critical path for the entire construction work, and became a factor that led to a prolongation of the construction period of the nuclear power plant.

The present invention has been made in consideration of the above circumstances, and provides a method for constructing a nuclear power plant that can shorten the construction period of a nuclear power plant and improve the work efficiency of construction work. The purpose is to

[Structure of the invention]

(Means for Solving the Problems) The present invention relates to the construction of a reactor containment vessel installed on a reactor building mat, and the construction of a reactor containment vessel that is installed on the reactor building mat surrounding the lower outer periphery of the reactor containment vessel. ,
A method for constructing a nuclear power plant, comprising constructing a torus constituting a pressure suppression chamber of a reactor containment vessel, and constructing a reinforced concrete wall rising from a reactor building pine around the outer circumference of the torus, the method comprising: A plate-like member corresponding to the surface of the wall facing the torus is erected on the reactor building pine,
The wall was started to be erected on the reactor building pine using plate-like members as formwork for creating the facing surface of the wall and as a permanent component of the wall, and the torus was partially formed without waiting for the completion of the wall construction. The process consists of transporting and installing the equipment on the reactor building mat.

(Function) Even during the construction of the wall, the surface of the wall facing the torus can be maintained without any modification to the plate-shaped member that has been erected on the reactor building mat.
The torus is carried and installed on the reactor building mat without being blocked by any obstacles even during the construction of the wall.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

FIG. 1 is a partially cutaway sectional view showing an enlarged horizontal section of the wall 6 of the torus chamber when this embodiment is applied, and the right side of the figure is the torus chamber 7 of FIG. 3.
is facing.

In FIG. 1, the reference numeral 15 is an H-shaped steel installed in the reactor building mat ( ) 1 shown in FIG. but,
It is inserted and held between the recesses of adjacent H-shaped steels 15. Reference numeral 17 represents other reinforcements. Note that the precast concrete plate 14 may be an iron plate or the like.

In this embodiment, as shown in the process diagram shown in FIG. 2, when pouring the reactor building mats (2) 1, predetermined intervals are placed along the torus room 7 side of the planned surface of the wall 6. The H-shaped steel 15 is built up to the planned height of the wall 6 while maintaining the height. Next, the anchor bolts of the torus 2 and the anchor bolts of the reactor containment vessel 3 are set.

Next, at the same time as the construction of the reactor building Matsut ( ) 4 begins, the walls 6 of the torus room are constructed. At this time, a precast concrete plate 14 was inserted into the H-shaped steel 15 that had been erected when the reactor building Matsut (2012) 1 was placed, and a scaffold was assembled outside the torus room 7 and engaged with the reinforcing bars 16. After carrying out work such as reinforcing reinforcement 17, the outer formwork is set and concrete is poured. On the other hand, the reactor building Matsuto ()4
After the completion of pouring, construct the underground shield wall (2). After this, the assembly of the reactor containment vessel 3 and the carrying-in and installation of the torus 2 are carried out in parallel. Next, the reactor containment vessel 3 is subjected to a pressure test, and upon completion of the pressure test, the reactor containment vessel 3 is painted. Once the painting is completed, reactor containment vessel 3
The space below is filled with concrete 8 and an underground shield wall () 9 is constructed. Thereafter, the floor 10 on the first floor, the wall 11 on the first floor, the shield wall 12 on the first floor, and the floor 13 on the second floor are constructed in this order.

According to this embodiment, even during construction of the wall 6,
Since there are no obstacles such as scaffolding on the side of torus room 7,
We can transport and install Taurus 2. That is, the fourth
As is clear from the comparison with the conventional process shown in the figure, regardless of the construction of the wall 6, the reactor containment vessel 3
Since the torus 2 can be carried in and installed in parallel with the assembly of the reactor containment vessel 3, it is possible to carry in and install the torus 2 in parallel with the assembly of the reactor containment vessel 3.
The time lost due to the delay in starting the pressure test of the reactor containment vessel 3 has disappeared. In addition, since the plate member is inserted and held between the recesses of each H-shaped steel, the plate member and the H-shaped steel can be more firmly connected than when their outer surfaces are directly joined. can.

〔Effect of the invention〕

According to the present invention, the work process from the construction of the torus chamber to the pressure test of the reactor containment vessel is improved, the construction period of a nuclear power plant can be shortened, and the work efficiency of construction work is also improved. can be done.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway sectional view showing a part to which an embodiment of the present invention is applied, Fig. 2 is a process diagram showing an embodiment of the present invention, and Fig. 3 is a torus-type reactor containment vessel. FIG. 4 is a longitudinal sectional view showing the main parts of the reactor building in which the reactor building is housed, and is a conventional process diagram. DESCRIPTION OF SYMBOLS 1... Reactor building mat, 2... Torus, 3... Reactor containment vessel, 6... Wall, 14... Precast concrete plate, 15... H-shaped steel, 16... Rebar.

Claims (1)

[Claims] 1 Construction of a reactor containment vessel installed on the reactor building mat, and a pressure suppression chamber of the reactor containment vessel that is installed on the reactor building mat and surrounding the lower outer periphery of the reactor containment vessel. A method of constructing a nuclear power plant includes constructing a torus, and constructing a reinforced concrete wall rising from the reactor building pine around the outer periphery of the torus. , a large number of H-beams are planted on the surface of the wall to be constructed facing the torus, and the plate member is inserted and held between the recesses of each of the planted H-beams to construct the wall. A method for constructing a nuclear power plant, characterized in that the torus is erected on the reactor building pine, and the partially formed torus is carried and installed on the reactor building pine without waiting for completion of the construction of the wall.