JP5208783B2 - Diffusion prevention structure and diffusion prevention method for leaked liquid - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a leakage liquid diffusion preventing structure and a diffusion preventing method, for example, suitable for preventing liquid leaking from equipment, piping, etc. in a nuclear power plant management area from diffusing into an unexpected area. The present invention relates to a diffusion preventing structure and a diffusion preventing method for leaking liquid.

  In general, nuclear power plants cannot completely eliminate leakage of liquid (for example, water) from equipment, piping, etc., so a water stop weir is provided in the area where leakage is a concern within the controlled area. The leaked liquid is prevented from diffusing into unexpected areas.

  In this case, the amount of liquid leaked from equipment, piping, etc. is measured, and if the amount exceeds a certain standard, it will be announced to the media. In addition, if the amount of radioactivity contained in the leaked liquid exceeds a certain standard, it will be subject to reporting under the law, but if the leaked liquid does not exceed the still water weir, it will be excluded from the reporting under the law. .

An example of this type of diffusion prevention structure is described in Patent Document 1. This diffusion prevention structure
A water stop weir made of concrete or steel is provided, and this water stop weir prevents liquid (for example, water) leaked from the equipment and piping in the management area from diffusing from the management area to the unexpected area.

Japanese Patent Laid-Open No. 62-280695

  By the way, among the anti-diffusion structures described in Patent Document 1, a concrete water stop weir assembles reinforcing bars in the floor and the part corresponding to the water stop weir, and assembles a formwork so as to surround the assembled reinforcing bars. Concrete must be placed inside this formwork. Moreover, the steel water stop weir has to embed a steel plate on the floor surface in advance, and a steel water stop plate must be attached to the steel plate via a rubber packing.

  For this reason, it takes time, labor, and cost to construct regardless of whether the water weir is made of concrete or steel, and if the liquid leaks in a place where the water weir is not installed, The prevention of diffusion cannot be dealt with promptly, and it is inevitable that the leaked liquid will diffuse into unexpected areas.

  The present invention has been made in view of the conventional problems as described above, and can be easily constructed in a short time without cost, and even in a place where no water stop weir is installed. It is an object of the present invention to provide a leakage liquid diffusion prevention structure and a diffusion prevention method capable of taking measures to prevent the leakage liquid from diffusing.

In order to solve the above problems, the present invention employs the following means.
That is, the present invention is a leakage liquid diffusion preventing structure that prevents liquid leaked from equipment, piping, etc. in a first zone from diffusing into a second zone adjacent to the first zone, A base material made of an elastic body installed on the floor surface of the first area or on the floor surface of the boundary between the first area and the second area, and standing integrally with the upper part of the base material Installed between the base material and the floor surface, and between the base material and the water stop plate, and a water stop plate made of an elastic body that forms a water stop weir with a predetermined height together with the base material. the a bonding agent for bonding the watertight, the substrate, the lower surface is formed in a substantially planar, cross-sectional mountain shape of a rectangular plate shape whose upper surface is formed on the inclined surface of sequentially inclined from both the ends toward the central portion in the width direction And a recess is formed in the central portion of the lower surface, and a fitting groove facing the longitudinal direction of the base material is provided at the center of the section The fitting groove communicates between the first groove having a circular cross section provided over the entire length of the base material, and the first groove and the upper surface central portion of the base material, over the entire length of the base material. The water stop plate is formed in a rectangular plate-shaped main body portion thinner than the width of the second groove of the base material, and the main body at one end portion in the width direction of the main body portion. A rib portion having a circular cross section having a diameter smaller than the diameter of the first groove of the base material provided over the entire length of the portion .

According to the structure for preventing leakage liquid from diffusing according to the present invention, the base material is installed on the floor surface of the first area or the boundary surface between the first area and the second area. A water stop plate is erected integrally at the top, and a water stop weir with a predetermined height is formed by the base material and the water stop plate, and between the base material and the floor surface and between the base material and the water stop plate. A diffusion preventing structure can be constructed by joining the gaps in a watertight manner with a joining means.
Therefore, the diffusion prevention structure can be easily constructed in a short time and without cost.
Moreover, since the water stop plate can be erected on the upper part of the base material by fitting the end portion of the water stop plate in the fitting groove of the base material, the water stop weir that prevents the diffusion of leaked liquid Can be constructed easily and in a short time.
Furthermore, by fitting the end portion of the water stop plate into the fitting groove of the base material, the water stop plate can be supported in an upright state by the elastic force of the base material. In addition, it is possible to easily construct a water stop weir that prevents diffusion of leaked liquid in a short time.
Therefore, for example, even if the liquid leaks in a place where the water blocking weir in the first area of the nuclear power plant is not installed, it is possible to immediately take measures to prevent the leakage liquid from spreading, Can be reliably prevented from diffusing from one area to the second area.

  Furthermore, this invention is good also as the said base material and the said water stop board being formed from the general purpose rubber material.

  According to the leakage liquid diffusion preventing structure of the present invention, since the base material and the water stop plate are formed of a general-purpose rubber material, for example, the water stop weir in the first section of the nuclear power plant is not installed. Even if the liquid leaks at the place and the liquid contains radioactive rays, the elastic force as a rubber material is not lost or the shape does not change. It is possible to reliably prevent diffusion into the two areas.

Furthermore, using the leakage liquid diffusion preventing structure according to claim 1, the liquid leaked from the equipment, piping, etc. in the first area diffuses from the first area to the second area adjacent to the first area. A method for preventing diffusion of leaked liquid that prevents the leakage of the base material on the floor surface of the first area or on the floor surface of the boundary between the first area and the second area. It is installed by bonding with the adhesive, and the base material is bent in a mountain from the center in the width direction to widen the second groove, and in this state, the first groove and the second groove of the base material The rib portion and the main body portion of the water stop plate are fitted into the groove, and at this time, the adhesive is filled in the first groove and the second groove, and the base material is restored to the original shape. By returning, the water stop plate is erected in the upper center portion of the base material .

  As described above, according to the diffusion prevention structure and the diffusion prevention method of the present invention, since it can be easily constructed in a short time and without cost, for example, a nuclear power plant Even if the liquid leaks in a place where the water stop weir in the first area is not installed, measures to prevent the liquid leakage can be taken immediately, and the leaked liquid diffuses from the first area to the second area. Can be reliably prevented.

It is the schematic perspective view which showed one Embodiment of the diffusion prevention structure by this invention. It is sectional drawing of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2 show an embodiment of a leakage liquid diffusion preventing structure according to the present invention. 1 is a schematic perspective view showing the whole, and FIG. 2 is a cross-sectional view of FIG.

  That is, the leakage liquid diffusion prevention structure (hereinafter referred to as “diffusion prevention structure 1”) according to the present embodiment is, for example, a first area (hereinafter referred to as “management area 15”) of a facility of a nuclear power plant. It is effective in preventing the liquid leaked from equipment or piping (for example, water containing radioactive rays) from diffusing into the second area (hereinafter referred to as “unexpected area 17”). This is effective in preventing the leakage liquid from diffusing in the management area 15 where the water blocking weir 2 is not provided.

  The diffusion prevention structure 1 of the present embodiment includes a base material 3 installed on the floor surface 16 of the management area 15 (or on the floor surface 16 at the boundary between the management area 15 and the unexpected area 17), and a base material 3, a water stop weir 2 composed of a water stop plate 10 erected integrally with the upper portion of 3, between the base material 3 and the floor surface 16 of the water stop weir 2, and between the base material 3 and the water stop plate 10. And an adhesive 14 which is a joining means for joining the gaps in a watertight manner.

  The base material 3 has a rectangular plate shape made of an elastic body such as rubber, and the lower surface 4 is formed in a substantially flat surface, and the upper surface 6 is formed in an inclined surface that sequentially inclines from the center in the width direction to both ends. A fitting groove 7 is provided over the entire length of the base material 3 at the center of the cross section of the base material 3 and facing the longitudinal direction of the base material 3.

The base material 3 is integrally bonded onto the floor surface 6 by filling the adhesive 14 between the lower surface 4 and the floor surface 6.
The adhesive 14 is not particularly limited as long as the base material 3 is water-tightly bonded to the floor surface 6 and a water stop plate 10 described later is water-tightly bonded to the base material 3 and a predetermined bonding force can be obtained. For example, ThreeBond 1500 series industrial adhesive (manufactured by ThreeBond Co., Ltd.) can be used.

  The lower surface 4 of the base material 3 is formed in a concave portion 5 whose central portion is one step lower than both end portions, and the concave portion 5 can take a large bonding area with the floor surface 6 through the adhesive 14. The bonding force between the lower surface 4 and the floor surface 6 can be increased.

  In addition, a plurality of concave portions (not shown) may be provided on the lower surface 4 of the base material 3 to increase the bonding area with the floor surface 6, or when a predetermined bonding force can be obtained, the lower surface of the base material 3. You may form the lower surface 4 of the base material 3 in the uniform plane over the whole, without providing a recessed part in 4. As shown in FIG.

  The fitting groove 7 is formed in a shape corresponding to the shape of the water stop plate 10 to be described later. In the present embodiment, the fitting groove 7 is provided over the entire length of the base material 3 at the center of the cross section of the base material 3. The first groove 8 having a circular cross-section, and the second groove having a rectangular cross-section provided over the entire length of the substrate 3, which communicates with each other between the upper portion of the first groove 8 and the center of the upper surface 6 of the substrate 3. 9.

  The second groove 9 of the fitting groove 7 is pushed and widened by bending the base material 3 from the center in the width direction. In this state, the water stop plate 10 is inserted into the fitting groove 7 from above the base material 3. And inserting the end portion of the water stop plate 10 into the first groove 8, fitting the portion continuing to the end portion into the second groove 9, and returning the base material 3 to the original shape. Thus, the water stop plate 10 can be erected vertically at the upper center portion of the base material 3.

  As the base material 3, a commercially available cable protector (for example, a cable protector MP series (manufactured by Mitutoyo Corporation), a cable protector CP series (manufactured by Kimoto Rubber Industry Co., Ltd.), etc.) can be used.

  Moreover, general-purpose rubber can be used as the material of the substrate 3.

  The water stop plate 10 is formed of an elastic body such as rubber, and is provided integrally with the rectangular plate-shaped main body 11 and one end of the main body 11 in the width direction over the entire length of the main body 11. The rib portion 12 is fitted into the first groove 8 of the fitting groove 7 of the base material 3, and the portion of the main body portion 11 that continues to the rib portion 12 is the base material 3. By fitting into the second groove 9 of the fitting groove 7, the upper part of the base material 3 is integrally provided upright.

  The rib portion 12 of the water stop plate 10 is formed in a circular cross section smaller than the diameter of the first groove 8 of the fitting groove 7 of the base material 3, and the main body portion 11 of the water stop plate 10 is fitted to the base material 3. It is formed in a rectangular plate shape thinner than the width of the second groove 9 of the groove 7, and the rib portion 12 of the water stop plate 10 and the portion of the main body portion 11 continuing to the rib portion 12 are placed in the fitting groove 7 of the base material 3. When fitted, between the peripheral surface of the rib portion 12 and the inner surface of the first groove 8 of the fitting groove 7, and the outer surface of the main body portion 11 continuing to the rib portion 12 and the second groove of the fitting groove 7. A predetermined gap 13 is formed between the inner surface of the base material 9 and the same adhesive 14 as the adhesive 14 used for joining the base material 3 is filled in the gap 13. The water stop plate 10 is erected in a watertight and integrated manner.

  A water stop weir 2 having a predetermined height can be formed on the floor surface 6 by standing a water stop plate 10 in a watertight and integrated manner in the upper central portion of the base material 3. It is possible to stop the liquid leaked from the equipment or piping in the management area 15 and prevent the leaked liquid from diffusing from the management area 15 to the unexpected area 17.

  As the water stop plate 10, a commercially available building or a rubber water stop plate of civil engineering materials can be used. Moreover, the water stop board 10 uses a general-purpose rubber material like the base material 3, and the water stop board 10 does not lose the function and shape as an elastic body by the influence of a radiation, and it is long-term. The function as the water stop plate 10 can be maintained.

  In the leakage liquid diffusion preventing structure 1 configured as described above, on the floor surface 16 of the management area 15 or on the floor surface 16 at the boundary between the management area 15 and the unexpected area 17. The base material 3 is integrally joined to the base material 3 by the adhesive 14, and the water stop plate 10 is integrally joined to the upper center portion of the base material 3 by the adhesive 14 to form the water stop weir 2 having a predetermined height. The water leakage weir 2 can stop the liquid leaked from the equipment and pipes in the management area 15 and can prevent the leakage liquid from diffusing from the management area 15 to the unexpected area 17.

  In this case, the base material 3 is joined to the floor surface 16 by the adhesive 14, the end portion of the water stop plate 10 is fitted into the fitting groove 7 of the base material 3, and the end portion of the water stop plate 10 is attached. Since it is only necessary to bond to the base material 3 with the adhesive 14, it is possible to respond immediately when liquid leaks from equipment or piping in a place where the water blocking weir 2 of the management area 15 is not provided, and leakage liquid is assumed. It is possible to reliably prevent diffusion to the outer area 17 side.

  Moreover, since a commercially available cable protector can be used for the base material 3 and a commercially available water stop plate can be used for the water stop plate 10, the time, labor, and cost required for the construction of the diffusion prevention structure 1 should be greatly reduced. Thus, an inexpensive diffusion prevention structure 1 can be provided.

  In the above description, the leakage liquid diffusion preventing structure 1 according to the present invention is applied to prevent the leakage of liquid leakage in the management area 15 of the nuclear power plant. It may be applied to prevent the spread of leakage.

DESCRIPTION OF SYMBOLS 1 Diffusion prevention structure 2 Water stop weir 3 Base material 4 Lower surface 5 Recessed portion 6 Upper surface 7 Fitting groove 8 First groove 9 Second groove 10 Water stop plate 11 Main body part 12 Rib part 13 Gap 14 Adhesive 15 Management area 16 Floor surface 17 Unexpected area

Claims (3)

A leakage preventing structure for leaking liquid that prevents liquid leaked from equipment, piping, etc. in the first zone from diffusing into a second zone adjacent to the first zone,
A base material made of an elastic body installed on the floor surface of the first area or on the floor surface of the boundary between the first area and the second area, and integrally with the upper part of the base material A standing water plate made of an elastic body that forms a water blocking weir with a predetermined height together with the base material, between the base material and the floor surface, and between the base material and the water stopping plate. With an adhesive that bonds water tightly,
The base material has a rectangular plate shape with a mountain-shaped cross section formed on an inclined surface that has a lower surface formed in a substantially flat surface and an upper surface that is sequentially inclined from the central portion in the width direction to both ends, and a concave portion is formed in the lower surface central portion. And a fitting groove facing the longitudinal direction of the base material is provided at the center of the cross section. The fitting groove includes a first groove having a circular cross section provided over the entire length of the base material, and the first groove. It consists of a second groove having a rectangular cross section provided over the entire length of the base material, which communicates with the center of the upper surface of the base material,
The base plate is provided over the entire length of the main body at a rectangular plate-shaped main body that is thinner than the width of the second groove of the base and at one end in the width direction of the main body. A structure for preventing diffusion of leaked liquid, comprising a rib portion having a circular cross section having a smaller diameter than the diameter of the first groove . The structure for preventing diffusion of leaked liquid according to claim 1 , wherein the base material and the water stop plate are formed of a general-purpose rubber material. Using the leakage preventing structure for leaked liquid according to claim 1, the liquid leaked from the equipment, piping, etc. in the first area diffuses from the first area to the second area adjacent to the first area. A method for preventing leakage of leaked liquid,
Installing the base material on the floor surface of the first area or on the floor surface of the boundary between the first area and the second area by bonding with the adhesive;
The base material is bent in a mountain shape from the center in the width direction to spread the second groove, and in this state, the rib portion of the water stop plate in the first groove and the second groove of the base material. And fitting the main body, and filling the adhesive into the first groove and the second groove at this time,
A method for preventing leakage of liquid leakage , wherein the water stop plate is erected at an upper central portion of the base material by returning the base material to its original shape .

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