JP7074728B2 - Blowout panel opening device - Google Patents

Description

The present invention relates to a device for opening a blowout panel, particularly a blowout panel opening device installed in a building in a nuclear power plant.

At the nuclear power plant, blowout panels are installed in the reactor building to alleviate the pressure rise inside the reactor building due to a pipe breakage accident. The blowout panel closes the opening provided in the outer wall of the reactor building and opens automatically when the pressure inside the reactor building increases.

If an accident that damages the core occurs at a nuclear power plant, the hydrogen generated by this accident may stay inside the reactor building and explode, damaging the reactor building. In order to avoid this hydrogen explosion, it is required to prevent hydrogen from staying inside the reactor building. Therefore, by opening the blowout panel to alleviate the pressure rise due to the pipe breakage accident, the retention of hydrogen is prevented.

Patent Document 1 describes an example of a device for opening a blowout panel. The blowout panel opening device described in Patent Document 1 includes a frame for reinforcing the blowout panel and a frame moving means for opening the blowout panel by removing it from an opening opened in the wall surface of the building, and the frame moving means is remotely controlled. It is possible, and the blowout panel can be opened remotely even when all power is lost.

Japanese Unexamined Patent Publication No. 2015-81829

The blowout panel opening device described in Patent Document 1 uses a mechanical drive unit such as an operating mechanism such as a hydraulic jack or a mechanical translation mechanism as a frame moving means for opening the blowout panel. Therefore, when the blowout panel is opened, sparks may be generated due to the contact between the metals in the mechanical drive unit. If a spark is generated when the blowout panel is opened to prevent hydrogen from staying inside the reactor building, the spark may ignite the hydrogen and cause a hydrogen explosion. Therefore, a blowout panel opening device that can open the blowout panel at an arbitrary timing, eliminate the cause of igniting hydrogen, prevent the ignition of hydrogen, and enhance the safety of the nuclear power plant is desired. ing.

An object of the present invention is to provide a blowout panel opening device capable of arbitrarily opening a blowout panel without providing a mechanical drive unit around the blowout panel.

The blowout panel opening device according to the present invention is configured to open the blowout panel installed on the outer wall so as to cover the opening provided in the outer wall of the building in the nuclear power plant, and the blowout panel on the outer wall. It is provided with an inflatable bag-shaped member provided at a position facing the surface, and an actuating portion for expanding the bag-shaped member to open the blowout panel.

According to the present invention, it is possible to provide a blowout panel opening device capable of arbitrarily opening a blowout panel without providing a mechanical drive unit around the blowout panel.

Schematic diagram of the reactor building. It is a vertical sectional view of the outer wall of a nuclear reactor building, and is the schematic diagram which shows the blowout panel opening apparatus by Example 1 of this invention. It is a vertical sectional view of the outer wall of the reactor building, and is the schematic diagram which shows the blowout panel opening device which opened the blowout panel by expanding a bag-shaped member. A view of the opened opening from the outside of the reactor building. A view of the opening closed by the blowout panel closing device from the outside of the reactor building. It is a vertical sectional view of the outer wall of a nuclear reactor building, and is the schematic diagram which shows the blowout panel opening apparatus by Example 2 of this invention.

The blowout panel opening device according to the present invention can forcibly open a blowout panel installed in a building in a nuclear power plant by the force of compressed gas at an arbitrary timing. Since the blowout panel opening device according to the present invention does not have a mechanical drive unit around the blowout panel, sparks do not occur and hydrogen inside the building can be prevented from being ignited.

Hereinafter, the blowout panel opening device according to the embodiment of the present invention will be described with reference to the drawings. In the following embodiment, a blowout panel opening device for opening a blowout panel installed on the outer wall of the reactor building will be described. The blowout panel opening device according to the present invention can also open the blowout panel provided on the ceiling of the reactor building. In the following examples, the outer wall of the reactor building shall include the ceiling of the reactor building. Further, the blowout panel opening device according to the present invention is not limited to the blowout panel installed in the reactor building, but opens the blowout panel installed on the outer wall of any building in the nuclear power plant such as a turbine building. be able to.

The blowout panel opening device according to the first embodiment of the present invention will be described.

FIG. 1 is a schematic view of the reactor building 13. The reactor building 13 houses the reactor pressure vessel 22 and the reactor storage vessel 21 that houses the reactor pressure vessel 22. A blowout panel 3 is installed on the outer wall 1 of the reactor building 13. The blowout panel 3 is held on the outer wall 1 by a clip (holding member), and can be detached from the outer wall 1 toward the outside of the reactor building 13.

FIG. 2 is a vertical sectional view of the outer wall 1 of the reactor building 13, and is a schematic view showing a blowout panel opening device according to the present embodiment installed in the reactor building 13. The outer wall 1 of the reactor building 13 is provided with an opening 2 penetrating the outer wall 1, and a blowout panel 3 is installed in the opening 2. The blowout panel 3 is installed on the outer wall 1 so as to cover and close the opening 2 from the outside of the reactor building 13. When the blowout panel 3 comes off the outer wall 1, the opening 2 is opened.

The outer wall 1 is provided with a recess 6 on the outer surface that opens toward the blowout panel 3. The recess 6 is provided at a position of the outer wall 1 facing the blowout panel 3 (a position closer to the inside of the reactor building 13 than the blowout panel 3).

The outer wall 1 includes a blowout panel closing device 9 which is a device for closing the opened opening 2. The blowout panel closing device 9 is supported by a support 10 and includes a door portion 9a that can slide and move along the outer wall 1. The door portion 9a is provided near the opening 2 and can slide to cover the opening 2.

FIG. 4A is a view of the opened opening 2 as viewed from the outside of the reactor building 13. The door portion 9a of the blowout panel closing device 9 is provided on the outer wall 1 of the reactor building 13.

FIG. 4B is a view of the opening 2 closed by the door portion 9a of the blowout panel closing device 9 as viewed from the outside of the reactor building 13. The door portion 9a can close the opening portion 2 by sliding and moving the opened opening portion 2 along the outer wall 1 to cover the opening portion 2.

As shown in FIG. 2, the blowout panel opening device according to the present embodiment includes a bag-shaped member 4 and an operating portion of the bag-shaped member 4.

The bag-shaped member 4 is composed of an inflatable bag-shaped member, and is installed in a recess 6 (inside the outer wall 1) of the outer wall 1. That is, the bag-shaped member 4 is provided at a position of the outer wall 1 facing the blowout panel 3 (a position closer to the inside of the reactor building 13 than the blowout panel 3). The bag-shaped member 4 can be made of, for example, a cloth made of any high-strength fiber or any high-strength rubber.

The operating portion of the bag-shaped member 4 includes a gas storage portion 7, a pipe 5, and a valve 8. The operating portion of the bag-shaped member 4 expands the bag-shaped member 4 to push the blowout panel 3 out of the reactor building 13 to remove it from the outer wall 1 and open the blowout panel 3.

The gas storage unit 7 includes at least one of a portable cylinder 7a and a non-portable cylinder 7b. The portable cylinder 7a and the non-portable cylinder 7b store compressed gas. As the compressed gas, for example, air, nitrogen, or helium can be used.

The pipe 5 connects the bag-shaped member 4 and the gas storage unit 7, and supplies compressed gas to the bag-shaped member 4.

The valve 8 is provided in the pipe 5 and is located between the bag-shaped member 4 and the gas storage unit 7. The valve 8 opens and closes, for example, electrically or electromagnetically. The actuating portion of the bag-shaped member 4 includes at least one of a valve 8 that is manually opened and closed by a worker by remote control and a valve 8 that is manually opened and closed by a worker at a place where the valve 8 is installed. It is preferable that the valve 8 can be remotely controlled.

The gas storage unit 7 and the valve 8 are not installed inside or around the reactor building 13 so that sparks generated when the valve 8 is opened and closed do not ignite hydrogen, and are located sufficiently away from the reactor building 13. It is preferable to install it in. By installing the valve 8 at a position away from the reactor building 13, a worker who opened the valve 8 to open the blowout panel 3 was able to use a gas containing radioactive substances released from the opened opening 2. It can prevent exposure. Further, by using the valve 8 which is opened and closed by remote control, it is possible to prevent the worker from being exposed to radiation.

The non-portable cylinder 7b can store the air supplied from the nuclear power plant as a compressed gas. When air cannot be supplied to the non-portable cylinder 7b from inside the nuclear power plant, the compressed gas can be supplied to the bag-shaped member 4 by using the portable cylinder 7a without using the non-portable cylinder 7b.

The bag-shaped member 4 is connected to the portable cylinder 7a or the non-portable cylinder 7b of the gas storage unit 7 by a pipe 5, and the compressed gas is supplied from the gas storage unit 7 by opening the valve 8. The bag-shaped member 4 expands when the compressed gas is supplied, and opens the blowout panel 3.

FIG. 3 is a vertical sectional view of the outer wall 1 of the reactor building 13, and is a schematic view showing a blowout panel opening device in which the bag-shaped member 4 expands to open the blowout panel 3.

For example, when the blowout panel 3 is forcibly opened in order to prevent hydrogen from staying inside the reactor building 13, the valve 8 is opened by a worker. When the valve 8 is opened, compressed gas is supplied from the portable cylinder 7a or the non-portable cylinder 7b to the bag-shaped member 4 through the pipe 5. If necessary, a blower may be used to supply the compressed gas to the bag-shaped member 4.

The bag-shaped member 4 expands when the compressed gas is supplied, and pushes the blowout panel 3 out of the reactor building 13. When the blowout panel 3 is pushed out by the expansion of the bag-shaped member 4 and comes off from the outer wall 1, the opening 2 of the outer wall 1 is opened.

The blowout panel opening device according to the present embodiment can open the blowout panel 3 as described above and release hydrogen inside the reactor building 13 to the outside of the reactor building 13 through the opening 2. The blowout panel opening device according to the present embodiment does not have a mechanical drive unit around the blowout panel 3, and the blowout panel 3 is arbitrarily forcibly opened by the force of the compressed gas, so that sparks are generated. Do not ignite hydrogen.

It is preferable that the bag-shaped member 4 mainly swells in the direction in which the blowout panel 3 opens (the direction from the inside to the outside of the reactor building 13). In the blowout panel opening device according to the present embodiment, since the bag-shaped member 4 is installed in the recess 6 of the outer wall 1 and the recess 6 opens toward the blowout panel 3, the bag-shaped member 4 is mainly used. The blowout panel 3 can be inflated in the opening direction. Therefore, the expansion force of the bag-shaped member 4 can be efficiently transmitted to the blowout panel 3, and the blowout panel 3 can be effectively opened.

The bag-shaped member 4 is made of a material having high strength so that the blowout panel 3 can be opened. By forming the bag-shaped member 4 with high-strength fibers or rubber, the bag-shaped member 4 can withstand the load when the blowout panel 3 is opened.

The bag-shaped member 4 can be installed at any position on the outer wall 1 as long as it faces the blowout panel 3. That is, the outer wall 1 can be provided with the recess 6 at an arbitrary position facing the blowout panel 3. The number of bag-shaped members 4 and recesses 6 can also be arbitrarily determined. The bag-shaped member 4 is preferably installed at a position facing the peripheral edge of the blowout panel 3, and if the blowout panel 3 is rectangular or square, it is installed at a position facing the four corners of the blowout panel 3. Is preferable.

The blowout panel 3 can be connected to the outer wall 1 of the reactor building 13 by a linear member 11 such as a chain or a rope. The blowout panel 3 detached from the outer wall 1 is restricted in movement by the linear member 11, does not come into contact with the blowout panel closing device 9, and does not fall from the outer wall 1. Therefore, the blowout panel closing device 9 can be reliably operated to close the opening 2.

The blowout panel opening device according to the second embodiment of the present invention will be described. Hereinafter, the blowout panel opening device according to the present embodiment will be described as different from the blowout panel opening device according to the first embodiment.

FIG. 5 is a vertical sectional view of the outer wall 1 of the reactor building 13, and is a schematic view showing a blowout panel opening device according to the present embodiment installed in the reactor building 13.

In the blowout panel opening device according to the present embodiment, the bag-shaped member 4 is installed outside the outer wall 1. The outer wall 1 is provided with a holding portion 14 on the outer surface. The holding portion 14 holds the blowout panel 3 with a clip, and the bag-shaped member 4 is installed. The holding portion 14 is composed of a plate-shaped member surrounding the bag-shaped member 4, and opens toward the blowout panel 3. The bag-shaped member 4 is provided at a position facing the blowout panel 3 (a position between the outer surface of the outer wall 1 and the blowout panel 3) outside the outer wall 1.

Even in the blowout panel opening device according to the present embodiment, the bag-shaped member 4 expands when the compressed gas is supplied, and pushes the blowout panel 3 out of the reactor building 13. When the blowout panel 3 is pushed out by the expansion of the bag-shaped member 4 and comes off from the outer wall 1, the opening 2 of the outer wall 1 is opened, and hydrogen inside the reactor building 13 is transferred to the outside of the reactor building 13 through the opening 2. Can be released into. The blowout panel opening device according to the present embodiment does not have a mechanical drive unit around the blowout panel 3, and the blowout panel 3 is arbitrarily forcibly opened by the force of the compressed gas, so that sparks are generated. Do not ignite hydrogen.

The present invention is not limited to the above embodiment, and various modifications are possible. For example, the above-described embodiment has been described in detail in order to explain the present invention in an easy-to-understand manner, and the present invention is not necessarily limited to the embodiment including all the described configurations. Further, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment. It is also possible to add the configuration of another embodiment to the configuration of one embodiment. Further, it is possible to delete a part of the configuration of each embodiment and add / replace another configuration.

1 ... outer wall, 2 ... opening, 3 ... blowout panel, 4 ... bag-shaped member, 5 ... piping, 6 ... recess, 7 ... gas storage, 7a ... portable cylinder, 7b ... non-portable cylinder, 8 ... Valve, 9 ... blowout panel closing device, 9a ... door part, 10 ... support, 11 ... linear member, 13 ... reactor building, 14 ... holding part, 21 ... reactor containment vessel, 22 ... reactor pressure vessel.

Claims (6)

It is configured to open the blowout panel installed on the outer wall so as to cover the opening provided in the outer wall of the building inside the nuclear power plant.
An inflatable bag-shaped member provided on the outer wall at a position facing the blowout panel.
An actuating part that inflates the bag-shaped member to open the blowout panel, and
A blowout panel opening device characterized by being equipped with. The blowout panel opening device according to claim 1, wherein the operating unit is connected to the bag-shaped member and includes a gas storage unit that stores compressed gas. The blowout panel opening device according to claim 1, wherein the bag-shaped member is provided on the outer surface of the outer wall and is installed in a recess that opens toward the blowout panel. The blowout panel opening device according to claim 1, wherein the bag-shaped member is installed outside the outer wall. The operating portion includes a pipe connecting the bag-shaped member and the gas storage unit, and a valve provided in the pipe.
The blowout panel opening device according to claim 2, wherein the valve can be remotely controlled. The blowout panel opening device according to claim 2, wherein the compressed gas is air supplied from the nuclear power plant.

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