JP4102162B2 - Cable penetration - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to cable penetration for penetrating and holding a cable module in a reactor containment vessel.
[0002]
[Prior art]
As shown in FIG. 7, the cable passing through the reactor containment vessel is held by cable penetration forming a pressure boundary.
[0003]
That is, a sleeve 3 as a nozzle is passed through the reactor containment vessel 1 and the shielding wall 2, and a header ring 5 is connected to the tip of the sleeve 3 protruding outward from the shielding wall 2 via an adapter 4. Is attached, and a plurality of cable modules 6 are attached to the header ring 5. Each cable 7 of the cable module 6 attached to the header ring 5 is connected to an external cable 10 via a terminal portion 9 held in a terminal box 8. On the other hand, a cable holding portion composed of a plurality of supports 12 connected by a support rod 11 is disposed in the sleeve 3, and the cable portion 13 of the cable module 6 is inserted into each support 12 of the cable holding portion. The tip of each cable part 13 is held and connected to the internal cable 16 via the terminal part 15 in the terminal box 14 in the storage container 1. An installation flange 17 is attached to the inside of the storage container of the sleeve 3, and the terminal box 14 is held on the installation flange 17. A cover 18 is attached to the outer periphery of each support 12 and is configured to cover the cable portion 13 held by the support 12. The support 12 and the like are attached to the inner end portion of the storage container of the cover 18. A shell 20 is provided that is centered by the mounting fixing bolt 19 and is positioned in the circumferential direction. In the figure, reference numeral 21 denotes a peripheral device.
[0004]
Since cable penetration uses an organic material such as epoxy for the cable and the cable boundary penetration, it needs to be replaced.
[0005]
In addition, the cable penetration includes not only the module type shown in FIG. 7 but also a canister type having an epoxy-filled cable penetration part integrated with the header ring part.
[0006]
When these types are replaced, the entire cable penetration is removed by cutting from the welded portion of the adapter 4 and the sleeve 3 shown in FIG. Then, a new cable penetration to be loaded is manufactured at the factory in the shape shown in FIG. 7 and completed, and the adapter 4 with a built-in header ring and the sleeve 3 are welded and completed at the site.
[0007]
[Problems to be solved by the invention]
By the way, the cable penetration of the prior art is assembled in the factory so that the header ring 5 to the cover 18 and the shell 20 are integrated, and is transported to the site after conducting a pressure test electrical test, etc. The end face of the built-in sleeve 3 and the adapter 4 were welded to the containment vessel.
[0008]
In this case, when constructing the plant, it can be installed smoothly without interference because it is installed before other equipment is attached to the carry-in route or installation location, which is reasonable. However, when exchanging cable penetrations in an existing plant, other equipment is installed in the carry-in route section or installation location, so the cable penetration may interfere with peripheral equipment during loading and loading. There is a problem that it is necessary to remove the interfering devices, which takes a construction period and costs.
[0009]
Also, if there are piping related to safety systems such as decay heat removal systems in the surrounding equipment piping, it takes a very long time to remove them, and in some cases there is a possibility that they cannot be replaced.
[0010]
In view of the above, an object of the present invention is to provide a cable penetration that minimizes the interference caused by peripheral devices and the like, and minimizes the replacement period, waste, and cost as much as possible.
[0011]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a cable penetration for holding a cable module penetrating a reactor containment vessel, wherein the cable module is inserted into a sleeve inserted into the reactor containment vessel. A cable module is held by sequentially connecting a plurality of cable holding parts constituted by connecting and holding two supports supporting the cable part with a support rod.
[0012]
According to a second aspect of the present invention, in the cable penetration for holding the cable module penetrating the reactor containment vessel, two sheets supporting the cable portion of the cable module in a sleeve inserted into the reactor containment vessel A cable module is held by sequentially connecting a plurality of cable holding parts constituted by connecting and holding the supports with guide pipes.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings.
[0014]
FIG. 1 is a diagram showing an overall configuration of cable penetration according to an embodiment of the present invention, and FIGS. 2A and 2B are explanatory diagrams at the time of assembly of FIG.
[0015]
The cable penetration is substantially the same as that shown in FIG. 7 and includes a sleeve 3 serving as a nozzle for the reactor containment vessel 1 and a header attached to the outside of the containment vessel of the sleeve 3 via an adapter 4. A ring 5, a cable module 6 attached to the header ring 5, supports 22 a, 22 b, which support the cable portion 13 of the cable module 6, and support rods 23 a, 23 b, which hold the supports 22 a, 22 b, From the shell 20 for centering these and positioning in the circumferential direction, the terminal box 8 for holding and supporting the terminal portion 9 for connecting the cable to the external cable 10, and the installation flange 17 for holding the terminal box 14 in the storage container It is configured.
[0016]
By the way, the cable holding part constituted by the support and the support rod includes, for example, a first unit 25a in which two supports 22a are connected by a support rod 23a and a cover 24a (FIG. 2) is attached to the outer periphery. A second unit 24b including a support 22b and a support rod 23b for connecting the support 22b to the support 22a, and a third unit 24c including a support 22c and a support rod 23c for connecting the support 22b to the support 22b. Then, it is divided into the shell 20 and assembled at a factory or the like, and transported and carried to the site and the installation site of the containment vessel for final assembly at the site.
[0017]
Next, a method for installation will be described with reference to FIGS. 2 (a) and 2 (b). First, the two supports 22a and the support rod 23a constituting the end face are assembled in advance outside the penetration, and a cover 24a is attached to the outside to constitute the first unit 25a. Then, the first unit 25a is inserted into the sleeve 3 from the installation flange 17 side. Therefore, with the end of the first unit 25a protruding from the end of the sleeve 3, the support rod 23b of the second unit 25b is attached to the support 22a, and the cover 24b divided on the outer surface thereof. To complete the unit (FIG. 2 (a)).
[0018]
Next, as shown in FIG. 2 (b), the second unit 25b is inserted into the sleeve 3 with the end part partially protruding from the sleeve 3, and the support of the third unit 25c is inserted into the support 22b. The rod 23c is attached, the cover 24c divided on the outer surface thereof is attached, and these are further inserted into the sleeve 3. At this time, the length of each unit 25a, 25b... Is configured to be equal to or less than the distance between the peripheral device 21 and the installation flange 17, so that these units can be easily made without being interfered by the peripheral device 21 or the like. Can be assembled into the sleeve 3.
[0019]
In this way, these units are sequentially assembled, and finally the shell 20 is centered by the mounting fixing bolt 19 to fix the support.
[0020]
This configuration is shown in FIG.
[0021]
Thereafter, the cable module 6 is inserted and assembled from the header ring 5 side.
[0022]
Next, as shown in FIG. 1, the terminal box 8 is attached, and the cable terminal portion 9 is connected to the external cable 10 to complete.
[0023]
FIG. 4 is a diagram showing another embodiment, in which the support unit is loaded from both the installation flange 17 side and the header ring 5. That is, the supports 22a, 22b, and 22c are sequentially loaded from the installation flange 17 side in the same manner as in the first embodiment, and the support 22d that is directly connected to the header ring 5 by the support rod 23d from the header ring 5 side. Load into sleeve 3. The header ring 5 may be welded to the sleeve 3 side after loading the support 22d to which the support rod 23d is connected into the sleeve 3 from the header ring 5 side.
[0024]
FIG. 5 is a view showing still another embodiment, in which a unit composed of two supports 22a connected by a support rod 23a is loaded from the header ring 5 side and two units connected by a support rod 23c. A unit comprising the supports 22b and 22c is loaded from the installation flange 17 side, and the shell 20 mounted on the unit is fixed to the external flange surface of the installation flange 17 with bolts or the like.
[0025]
In FIG. 6, guide pipes 30a and 30b are attached between the support 22a and the support 22c and to the support 22d so as to facilitate loading when the cable module is inserted.
[0026]
In this case, the function of the support rod can be given to the guide pipes 30a and 30b, so that the support rod can be omitted. This guide pipe can also be mounted in the embodiment of FIG.
[0027]
【The invention's effect】
Since the present invention is configured as described above, the replacement cable penetration can be installed without interfering with the peripheral device, and it is not necessary to remove and restore the peripheral device, thereby greatly reducing the work process. Not only can the generation of radioactive waste associated with removal be eliminated, but it can be extremely effective in improving the global environment, construction processes, and power plant availability.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of the entire cable penetration device of the present invention.
FIGS. 2A and 2B are explanatory views when the support unit of FIG. 1 is installed.
FIGS. 3A and 3B are diagrams showing a time when a support unit is completely installed, FIG. 3B is a cross-sectional view taken along the line AA in FIG. 3A, and FIG.
FIG. 4 is an explanatory view when installing a cable penetration of a type in which a support is loaded from both sides of a containment vessel as a modified example of the present invention.
FIG. 5 is a view showing a modification of the support fixing method of the type shown in FIG. 4;
FIG. 6 is an explanatory diagram of a guide pipe mounting type cable penetration when a cable module is loaded.
FIG. 7 is a configuration diagram of the entire conventional cable penetration device.
[Explanation of symbols]
1 reactor containment vessel 2 shielding wall 3 sleeve 4 adapter 5 header ring 6 cable module 7 support rod 20 shell 21 peripheral device 18, 24a, 24b, 24c cover 22a, 22b, 22c, 22d support 23a, 23b, 23c, 23d support Rod 30a, 30b Guide pipe

Claims (2)

In cable penetration that holds the cable module that penetrates the containment vessel,
A cable module is formed by sequentially connecting a plurality of cable holding parts formed by connecting and holding two supports supporting the cable part of the cable module with a support rod in a sleeve inserted into the reactor containment vessel. Cable penetration characterized by holding. In cable penetration that holds the cable module that penetrates the containment vessel,
A cable module is formed by sequentially connecting a plurality of cable holding parts configured by connecting and holding two supports supporting the cable part of the cable module with a guide pipe in a sleeve inserted into the reactor containment vessel. Cable penetration characterized by holding.

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