JPS645954Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a reactor containment vessel electric wire penetration device installed in a reactor containment vessel, and in particular, an attachment structure for a customer module and a header ring installed in the reactor containment vessel electric wire penetration device. Regarding.

Various electric wires and cables such as power lines, signal lines, and control lines necessary for reactor operation are required to enter the reactor containment vessel.

However, this reactor containment vessel prevents the radioactive materials released inside from leaking to the outside, not only during normal operation, but also in the unlikely event of an accident.
This equipment is used to protect against radiation disasters, and its airtightness requires high reliability.

The reactor containment vessel electric wire penetration device is a device that allows the above-mentioned electric wires and cables to penetrate the above-mentioned reactor containment vessel, and as a part of the reactor containment vessel, it maintains pressure resistance and airtightness, and also allows the above-mentioned various types of wires to pass through the reactor containment vessel. Electrical wires and cables must maintain the electrical characteristics necessary for their respective applications.

A conventional reactor containment vessel electric wire penetration device will be described below with reference to the drawings. FIG. 1 shows a conventional reactor containment vessel electric wire penetration device, and FIGS. 2 and 3 show
The figure shows a conventional customer module and header ring and their mounting structure.

The reactor containment vessel 1 includes a plurality of sleeves 2 for penetrating the reactor containment vessel electric wires.
The reactor containment wire penetration device is installed inside the reactor containment vessel electric wire penetration device. This reactor containment wire penetration device has a header ring 4 attached to one end of the sleeve 2, and a flange 5 attached to the other end by welding. Penetrating the header ring 4,
- The customer module 6 is attached via double rings (not shown).

Attachment of the customer module 6 to the header ring 4 is performed by attaching the customer module 6 to the header ring 4 (not shown).
The bolts 7, clamps 8, spherical washers 9, and other fastening parts are used. Furthermore, fastening parts such as one bolt 7, clamp 8, and spherical washer 9 are attached to multiple customer modules 6 at the same time [for example, one bolt 7 and one set of spherical washer 9 Three customer modules 6 are fixed, and one bolt 7 and one clamp 8 are used to fix two customer modules 6. ], In order to attach one customer module 6 to the header ring 4, fastening parts such as a plurality of bolts 7, clamps 8, and spherical washers 9 are used. In order to attach the Yule 6 to the header ring 4, four bolts 7, two clamps 8 and two sets of spherical washers 9 are required. In addition to the fastening parts, one ring 10 is required].

The customer module 6 is installed using the parts and method described above, so when installing the customer module 6 to the reactor containment wire penetration device, first attach all the customer modules 6 to the header ring 4. After inserting the ring 10
, then attach fastening parts such as the bolt 7, clamp 8, and spherical washer 9, and then tighten the bolt 7. In addition, when tightening the bolt 7, in order to maximize the sealing effect of the -ring (not shown), the bolt 7 must be tightened several times using the specified tightening torque and procedure. Also, header ring 4
After inserting and assembling the customer module 6 and installing the reactor containment wire penetration device in the sleeve 2 at the site, add the customer module 6 or check whether the already installed customer module 6 has pressure sealing properties or electrical characteristics. If some kind of problem occurs and it becomes necessary to replace the customer module 6, remove the fastening parts such as the bolt 7, clamp 8, and spherical washer 9 that secure the customer module 6 in the reverse order of installation. After that, a series of operations are required to pull out the customer module 6. As explained above, the structure of the conventional customer module 6 is complicated because there are many types and numbers of fastening parts for fixing it. Furthermore, since the bolts 7 are tightened in several stages according to prescribed procedures and tightening torques, it takes a long time to attach and detach the customer module 6. For this reason, especially when a customer module 6 is added or replaced during periodic inspections of a nuclear power plant that is already in operation, the operating rate of the nuclear power plant will decrease and the number of workers will be reduced. Issues such as radiation exposure and health management will also arise. Furthermore, since a plurality of customer modules 6 are fixed with one bolt 7, there is also a problem of seal resistance.

In order to deal with the above-mentioned problems, this invention
By simplifying the structure of the customer module 6 installed in the reactor containment vessel electric wire penetration device, and by making the installation method independent and simple, the customer module 6 can be installed and removed in an extremely short time. The purpose is to make the work easier and to improve seal resistance.

The present invention will be described in detail below with reference to the drawings of an embodiment. FIG. 4 is a cross-sectional view showing the mounting structure of the customer module 20 according to the present invention, FIG. 5 is a side view of FIG. 4, and FIG. Detailed view, FIG. 7 shows a detailed view of 15 parts of the smock module. The same parts as in FIGS. 1 to 3 will be described with the same reference numerals.

The reactor containment vessel 1 includes a plurality of sleeves 2 for penetrating the reactor containment vessel electric wires.
The reactor containment wire penetration device is installed inside the reactor containment vessel electric wire penetration device. This reactor containment vessel electric wire penetration device has a header ring 4a attached to one end of the sleeve 2, and a flange 5 attached to the other end by welding. The header ring 4a includes:
The customer module 20 is attached via a double sealing member 11 such as an O-ring. The customer module 20 is a stock module 1.
5 and wire modules 16 and 17,
It is assumed that the header ring 4a is attached to the header ring 4a using a screw-fixing type coupling ring 12. The shape, fixing method and number of the coupling 12 can be arbitrarily selected.
Further, a coupling ring 12 is provided between the coupling ring 12 and the flange portion of the customer module 20.
A ring 13 is provided to ensure a crushing margin for the seal member 11 when screwing in, to prevent damage, and to fix the position of the customer module 20.
The shape and number of the rings 13 can be arbitrarily selected. Moreover, the coupling ring 12 and the ring 13
In between, a friction reducing member 14 is provided to prevent the ring 13 from rotating due to friction when the coupling ring 12 is screwed in. Furthermore, as shown in FIG. 7, the flange portion of the stock module 15 of the customer module 20 is made symmetrical in the axial direction, and the header ring 4 is made symmetrical in the axial direction.
When attached to the header ring 4a, the seal member 11, the ring 13, and the coupling ring 12, the directionality is eliminated.

Next, a method for attaching and detaching the header ring 4a and the customer module 20 will be explained using the attachment described above.

First, the wire module 16 is inserted into the header ring 4a inside the reactor containment vessel 1. next,
The stock module 15 is fitted with seal members 11 on both sides of the flange portion, connected to the wire module 16, and then inserted into the header ring 4a. Next, the ring 13, the friction reducing member 14, and the coupling ring 12 are sequentially attached to the header ring 4a.
Attach it to the stock module 15 inserted into the stock module 15, rotate the coupling 12, and tighten it to the specified tightening position. Next, the above stock module 15
Attachment of the customer module 20 is completed by attaching the wire module 17 to the other end. The next time you want to remove the customer module, reverse the installation procedure described above.

As described above, when the customer module 20 and its attachment device installed in the reactor containment wire penetration device according to the present invention are used, when one customer module 20 is attached to the header ring 4a, one Cup ring 1
2. One ring 13 and one set of friction reducing members 1
4, the structure can be simplified, the number of parts can be reduced, and working time can be significantly shortened. Also, one customer module 2
0 is installed using the set of installation devices described above, and the customer module 20 installation hole of the header ring 4a is connected to the seal member 1.
Since the structure restricts the compression of 1, the sealing resistance is improved. In addition, customer module 20
uses a customer module in which the stock module 15 and wire modules 16 and 17 can be attached and detached, and the stock module 15
Since there is no directionality between the inside and outside of the reactor containment vessel wire penetration device, there are advantages such as eliminating assembly errors.

The present invention has been explained above with reference to its specific examples, but
The invention is not limited to the shapes of these particular embodiments.

[Brief explanation of drawings]

Figure 1 shows a conventional nuclear reactor containment wire penetration device, Figure 2 is a sectional view showing the customer module in Figure 1 and its mounting structure, and Figure 3 shows the
4 is a sectional view showing a customer module and its mounting structure according to an embodiment of the present invention, FIG. 5 is a side view of FIG. 4, and FIG.
Detailed view of the customer module installation in the figure,
FIG. 7 is a detailed view of the stock module portion of the customer module of FIG. 4. 2... Sleeve, 4a... Header ring, 5
...Flange, 15...Stock module, 1
1... Seal member, 16, 17... Wire module, 12... Coupling.

Claims (1)

[Claims for Utility Model Registration] (1) A sleeve that penetrates a thin wall, a header ring installed at one end of the sleeve, a flange installed at the other end of the sleeve, and a header ring formed on the header ring. a stepped through hole, a stepped structure cylindrical customer module having a large diameter portion in the middle that is inserted into the through hole, and a stepped portion of the header ring and a stepped cylindrical customer module; a first sealing material provided between the stepped portion of the cylindrical customer module, a second sealing material provided on the other stepped portion of the cylindrical customer module, and a ring-shaped coupling that presses the second sealing material. and a thread that engages with each other formed on the outer circumferential surface of the coupling ring and the inner circumferential surface of the through hole formed in the header ring, and when the second sealing material is pressed, the coupling ring A nuclear reactor containment vessel electric wire penetration device formed long so as to protrude outward from the header ring. (2) The customer module is comprised of an axially symmetrical stock module and a wire module fixed to both ends of the stock module. Reactor containment vessel electrical wire penetration device as described in .