KR100517121B1 - Reactor structure inner type refueling water storage tank for nuclear fuel of nuclear power plant - Google Patents

Abstract

The present invention relates to a containment structure of a nuclear fuel reloading tank-embedded nuclear power plant, for the purpose of establishing a nuclear fuel reloading tank in a state of confidentiality without expanding a separate installation area in a containment structure in which a nuclear reactor is disposed. In order to achieve the above object, the present invention provides a concrete foundation; Concrete tank outer wall and concrete tank inner wall erected on the concrete foundation to form the edge of the tank space, concrete slab supported on the tank outer wall and the tank inner wall, the slab and the tank inner wall and the tank outer wall and foundation to maintain the confidentiality of the tank space Reload tank consisting of a water tank frame forming a shielding surface for; It is characterized by consisting of an outer wall of the containment building which is built on the foundation and supports the roof by receiving the reload tank. In the present invention, the reloading tank is built in the containment building to improve the safety and the ability to deal with serious accidents, using the wall frame and the tank frame as a substitute for the formwork by the prefabricated structure and the structure of the wall frame and the tank frame and the structure in the field Since reinforcing bars work at the same time in a separate place, it is a useful invention that not only shortens the construction period but also significantly increases construction productivity.

Description

Reactor structure inner type refueling water storage tank for nuclear fuel of nuclear power plant}

The present invention relates to a containment structure of a nuclear fuel reloading tank-embedded nuclear power plant in which a nuclear fuel reloading tank is constructed without expanding a separate installation area within a containment structure in which a nuclear reactor is disposed.

In general, a nuclear fuel reloading tank stores boron water. During normal operation of a nuclear power plant, stored boron water is supplied to prevent leakage of radiation into the fuel storage or handling space, and in case of an accident, removes the decay heat generated from the reactor. To the reactor and to the reactor building in a variety of ways.

However, the conventional nuclear fuel reload tank having such a function is disposed outside the containment building in which the nuclear reactor is disposed, which causes difficulties in installing boron water more quickly in the event of an accident and an accident.

In other words, nuclear fuel, which is generally loaded in nuclear reactors and causes fission, has a low concentration over time, so periodic replacement is required. Such fuel replacement work should be done underwater because it should block external leakage of radiation. In this case, the aqueous solution used is generally used for boron water having a nuclear fission inhibitory effect, and for this purpose, a tank for storing a large amount of boron water is required, which is called a nuclear fuel reload tank.

Boron water stored in such a fuel reload tank is primarily used for nuclear fuel replacement work, but when an accident occurs that prevents nuclear fission control of the reactor due to some reason, it is injected into the reactor in large quantities or injected into the reactor building to mitigate the accident. Has

The conventional nuclear fuel reload tank is designed as a separate structure outside the containment structure in which the nuclear reactor is disposed, and has a separate supply path for supplying the reactor, etc., so that there is difficulty in installation and rapid response.

This problem can be solved by constructing the reload tank in the containment building where the reactor is placed, but it is difficult to install the reload tank without expansion of the blocking area for confidentiality within the limited containment space and reload after installation. The structure of the tank acts as an obstacle, which makes it difficult to add construction difficulties to the surrounding structures including the containment walls.

The present invention was created in order to solve the above-mentioned problems, an object of the present invention is to build a nuclear fuel reload tank built nuclear fuel recharge tank without expanding the separate installation area in the containment structure in which the reactor is placed To provide a containment structure.

It is another object of the present invention to provide a containment structure of a nuclear fuel reloading tank-embedded nuclear power plant that is easy to construct a containment wall including installation of members for the airtightness of the reloading tank.

It is another object of the present invention to provide a containment structure of a nuclear fuel reloading tank-embedded nuclear power plant that ensures confidentiality of the reloading tank.

The present invention for achieving the above object is a concrete foundation; Concrete tank outer wall and concrete tank inner wall erected on the concrete foundation to form the edge of the tank space, concrete slab supported on the tank outer wall and the tank inner wall, the slab and the tank inner wall and the tank outer wall and foundation to maintain the confidentiality of the tank space Reload tank consisting of a water tank frame forming a shielding surface for; It is characterized by consisting of an outer wall of the containment building which is built on the foundation and supports the roof by receiving the reload tank.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention for realizing the above object will be described in detail with reference to FIGS. 1 to 4.

In FIG. 1, reference numeral 10 denotes a containment structure according to the present invention.

The containment structure 10 is formed on the ground to form a concrete foundation 20 and a smooth surface forming a closed border, such as a circular or annular to support the roof not shown and built on the foundation 20 The external wall 30, the reloading tank 40 built in the outer wall 30, and the reloading tank 40 as a part of the structure are separate equipment such as the reactor (4) and the steam generator (2) It has a configuration of the internal structure 50 to be arranged in a separate space.

The containment building 10 is attached to the inner wall of the outer wall 30, the wall frame 32 made of steel forming a shielding surface.

And the reloading tank 40 is built on the concrete foundation 20, the concrete tank outer wall 41 and the concrete tank inner wall 42, which forms the tank space 45 border, the tank outer wall 41 and the tank inner wall 42 To the concrete slab 43, the slab 43 and the tank inner wall 42 and the tank outer wall 41 and the base 20 in the range of the tank inner wall 42 and the tank outer wall 41 supported by the tank It consists of a water tank 44 which forms a shielding surface for airtightness of the space 45.

As shown in FIG. 2, the tank 44 is made of stainless steel to prevent contamination of the reloading water in the reloading tank 40, and the tank inner cylinder 442 and the tank outer cylinder which form the inner circumferential surface of the tank space 45. 444 and a tank top plate 446 mounted in a state supported by the tank inner cylinder 442 and the tank outer cylinder 444 and a tank bottom plate 448 placed on the bottom surface of the tank space 45 are provided. The tank upper plate 446 and the tank lower plate 448 are welded to the inner tank 442 and the outer tank 444 by welding.

At this time, the tank top plate 446 is divided into four places in Figure 2, and fusion, but such a division unit can be appropriately increased or decreased according to the ease of production and assembly.

In addition, the steel aggregate 60 is welded and welded to the inner surface of the inner tank 442, the outer surface of the outer tank 444 and the upper portion of the tank top plate 446, respectively, the steel aggregate 60 is concrete tank inner wall 42 ) And the tank outer wall 41 and the slab 43. Thus, the steel aggregate 60 embedded in the concrete tank inner wall 42, the tank outer wall 41 and the slab 43 is welded and welded with the tank inner cylinder 442, the tank outer cylinder 444 and the tank top plate 446. The tank inner cylinder 442 and the tank outer cylinder 444 and the tank top plate 446 prevents the lifting of the concrete tank inner wall 42, the tank outer wall 41 and the slab 43.

The steel aggregate 60 is a member fused and protruded to the tank inner cylinder 442 and the tank outer cylinder 444 and the tank top plate 446 as shown in Figures 3 and 4, the tee bar 62, the bending plate 64 ), Bar plate 66, angle 68, but is not limited to the shape of the steel aggregate of the shape having an area for securing the joint area with the concrete is filled without interference and filled concrete (60) Can be implemented.

That is, as shown in FIG. 3, the tee bar 62 is vertically welded and welded to the inner surface of the inner tank 442 and the outer surface of the outer tank 444 at a predetermined interval, and is cylindrical on the upper end of the tee bar 62. Bar plate 66 is connected, and the bending plates 64 are welded and welded to maintain their circular shape on the inner side of the bar plate 66. Thus, when the tank outer wall 41 and the tank inner wall 42 are placed, the steel aggregate 60 is embedded in the tank outer wall 41 and the tank inner wall 42 so that the bar plate 66 and the bending plate 64 can be seen. Balance the lateral pressure applied to) to ensure a good bond.

In addition, as shown in FIG. 4, the tank top plate 446 is vertically welded with a tee bar 62 having a reinforcing bar hole 622 at a predetermined interval, and penetrated through the reinforcing hole 622 of the tee bar 42 in a ring shape. Rebar 80 is formed, the angle of the angle 68 is welded and fused to the side of the tee bar 62. In this case, the angle 68 is fused to the tee bars 62 and has a function of securing a supporting force when placing concrete.

Such steel aggregate is also provided on the outer surface of the wall frame in the same configuration as in Figure 3, but the illustration thereof is omitted with reference to Figure 3.

Meanwhile, the reload tank 40 is constructed at a predetermined distance from the outer wall 30 of the containment structure 10 in order to secure structural safety during an earthquake, as shown in FIG. 1A. In addition, there is a heat shielding effect and a compressive metal filler (70) (Filler Material) is inserted into the filling means between the two walls and the sealing material 72 (Sealant) is applied to block the moisture on the upper portion.

In addition, the internal structure 50 is to provide an independent space for the arrangement of the steam generator 2 and the reactor 4, as shown in Figure 1 the upper side of the slab 43 of the reload tank 40, the steam generator ( A storage outer wall 56 and a storage inner wall 54 forming a hermetic rim forming the storage space 52 for storing 2) are constructed.

Accordingly, a storage space 52 for disposing the steam generator 2 is formed between the storage inner wall 54 and the storage outer wall 56, and the tank inner wall 42 and the storage inner wall 54 of the reloading water tank 40. The rim includes a space in which the reactor 4 is accommodated on the bottom of the base 20.

Construction of the present invention by the above configuration and its action is as follows.

First, the containment structure 10 according to the present invention is the construction order of the concrete foundation 20, reloading tank 40, the internal structure 50, the outer wall 30.

That is, after the construction of the concrete foundation 20, the reloading water tank 40 depends on the order of wall construction, floor construction, ceiling construction.

Wall construction of the reloading water tank (40) is made in advance of manufacturing the water tank frame (44) made of stainless steel as an integral module having an annular or circular closed frame, and then lifting the concrete in the state where the reinforcing of the wall is completed. Pour.

That is, in the water tank frame 44, the water tank inner cylinder 442 and the water tank outer cylinder 444 are pre-fabricated into two modules having different diameters and placed on the foundation 20, and then the existing external formwork including the reinforcing work is external. Install on the side.

At this time, the tank inner cylinder 442 and the tank outer cylinder 444 is placed in the base portion 20 so that the concentric shaft coincides with the concentric axis of the base portion 20 so that the inner surface thereof forms the circumferential surface of the reloading tank 40. Concrete tank outer wall (41) and tank inner wall in which the inner tank for each concrete form to form the outer tank 444 and the tank inner cylinder 442 is closely attached in a state where the lifting is prevented by the steel aggregate (60) Let 42 be built.

Thereafter, the water tank lower plate 448 is welded to the water tank outer cylinder 444 and the water tank inner cylinder 442 to perform a bottom process in the internal water tank.

The ceiling construction is pre-assembled in four stages of the tank top plate 446 in the fabrication site, then lifted and installed on the top of the wall to assemble the reinforcing bars and cast concrete. Accordingly, concrete slabs 43 are tightly attached in a state where lifting is prevented by the steel aggregate 60 fused to the top of the tank top plate 446 when concrete is poured.

That is, the tee bars 62, the bending plates 64, the bar plates 66, and the angles 68, which are steel aggregates 60, are the tank outer wall 41, the tank inner wall 42, and the tank top plate 446. ), It acts as a joint area to improve the joint by distributing the lateral pressure in the balance of the external wall.

After demolding the external formwork to build a concrete outer wall 30 of the containment building (10). This is because the wall frame 32 in the state of receiving the reloading tank 40 is placed so as to coincide with the concentric axis of the base 20 so as to maintain a constant distance from the tank outer wall 41 of the reloading tank 40. The inner surface forms a circumferential surface for receiving the reload tank 40. Therefore, when the concrete is placed after the installation of the external formwork using the wall frame 32 as an internal formwork, the lifting is prevented by the steel aggregates 60 constituting the same configuration as the tank outer cylinder 444 and the tank inner cylinder 442. Construct a concrete exterior wall 30 to be attached.

In addition, the filling material is filled between the wall frame 32 and the tank outer wall 41 of the reloading water tank 40 by the filling means and the encapsulant 72 for blocking moisture on the upper portion of the metal filling material 70. By applying to the water-blocking state is equipped with a structure of earthquake-resistant and heat shield between both walls.

Therefore, in the present invention, the reload tank is built in a containment building of a nuclear power plant in which a device such as a reactor steam generator is disposed, thereby improving safety and coping ability.

In addition, the reload tank is built in a containment building of a nuclear power plant in which devices such as a nuclear reactor, a steam generator, etc. are disposed, and the amount of construction of the structure forming a nuclear power plant for the containment building and the reloading tank as a conventional separate structure and There is an effect of shortening the construction period and reducing the construction cost.

In addition, this construction uses the wall frame and the water tank frame as a substitute for the formwork by prefabrication, and its dismantling work is excluded, and the steel frame work of the outer wall is sequentially performed in a narrow space, thereby achieving easy work and shortening of construction.

In addition, since the construction of the wall frame and the water tank frame and the reinforcing structure of the structure in the field are performed at the same time at a separate place, it is a useful invention that can greatly shorten the construction period and increase construction productivity.

1A and 1B are cross-sectional views showing the structure of a reloading tank-containing containment structure according to the present invention;

Figure 1a is a longitudinal cross-sectional view, Figure 1b is a flat cross-sectional view,

Figure 2 is a perspective view showing the configuration of the iron plate frame applied to the reloading tank of the present invention,

Figure 3 is a cross-sectional view taken along the line A-A of Figure 2 showing the configuration of the steel aggregate applied to the water tank of the present invention,

4 is a cross-sectional view taken along the line B-B of Figure 2 showing the configuration of the steel aggregate applied to the water tank of the present invention;

＊ Explanation of symbols for main parts of drawing ＊

         10: containment structure 20: foundation

         30: outer wall 32: wall frame

         40: reload tank 41: tank outer wall

         42: inner wall of the tank 43: slab

         44: water tank 45: water tank space

         60: steel aggregate 62: tee bar

         70 metal filler 72 encapsulant

         442: tank tank 444: tank tank

         446: tank top plate 448: tank bottom plate

Claims (8)

A concrete base 20, a reloading water tank 40 built on the concrete base, and a reloading water tank 40 are accommodated and built on the concrete base 20 to support a roof. In a nuclear power plant consisting of an outer wall 30 of a building 10, The reload address 40, A concrete tank outer wall 41 and a concrete tank inner wall 42 and a tank outer wall 41 that are erected on the concrete foundation 20 to form a water tank space 45; A concrete slab 43 supported on the tank inner wall 42; The inner circumferential surface of the tank space 45 is attached to the slab 43, the tank inner wall 42, the tank outer wall 41 and the concrete foundation 20 to form a shielding surface for airtightness of the tank space 45. A water tank inner plate 442 and a water tank outer cylinder 444 and a water tank upper plate 446 mounted in a state supported by the water tank inner cylinder 442 and a water tank lower plate 448 placed on the bottom of the water tank space 45 are provided. An inner tank 442 and a tank outer tank 444, the tank top plate 446 and the tank bottom plate 448 is welded and fused weld tank structure, characterized in that the containment structure of the nuclear fuel reload tank built nuclear power plant. The method of claim 1, The tank frame 44 includes a tank top plate 446 and a tank space mounted in a state in which the tank inner cylinder 442 and the tank outer cylinder 444 and the tank inner cylinder 442 forming the inner circumferential surface of the tank space 45 are supported. 45) having a tank lower plate 448 placed on the bottom of the tank, and the tank inner plate 442 and the tank outer tube 444, the tank top plate 446 and the tank bottom plate 448 is fused. Containment structure of embedded nuclear power plant. The method of claim 1, Countertop 44, The steel aggregate 60 to be embedded in the tank inner wall 42, the tank outer wall 41 and the slab 43 is welded and welded to the inner tank 442, the outer tank 444 and the tank top plate 446. A containment structure for a nuclear fuel reload tank built-in nuclear power plant. The method of claim 3, Steel aggregate 60 of the tank top plate 446 includes a tee bar 62, the tee bar 62 is characterized in that the reinforcing holes 622 are formed to be assembled in a state where the reinforcing bar 80 is penetrated Containment Structure of Nuclear Power Plant with Nuclear Fuel Reload Tank. The method of claim 1, Tank structure 44 is a containment structure of the nuclear fuel reload tank built nuclear power plant, characterized in that the stainless material. The method of claim 1, The outer wall 30 has a wall frame 32 attached to the inner side to form a shielding surface; The wall frame 32, The containment structure of the nuclear fuel reloading tank-embedded nuclear power plant, characterized in that the steel aggregate 60 to be embedded in the outer wall 30 is welded and fused. The method of claim 1, The metal filler 70 and the sealing material 72 for blocking moisture on the upper portion of the metal filler 70 are applied as a filling means for maintaining airtightness between the outer wall 30 and the reloading water tank 40. Containment structure of the nuclear fuel reload tank built nuclear power plant, characterized in that. The method of claim 1, In the reloading tank 40, a storage outer wall 54 and a storage inner wall 54 are constructed with the upper surface of the slab 43 at the bottom, and the steam generator 2 is accommodated between the storage outer wall 54 and the storage inner wall 54. Containment structure of the nuclear fuel reload tank built-in nuclear power plant, characterized in that for providing a storage space 52 to be.