KR20130120126A - Marine nuclear plant and installation method of it - Google Patents

Abstract

The present invention relates to a marine nuclear power plant and a construction method thereof. The present invention has a structure including a gate mounted on a GBS and a barge laid on the bottom of the GBS; is free from restraint on a plant construction site in a method of bringing seawater inside by installing the GBS in the ocean, mounting the barge with facilities including a nuclear reactor and a generator on the GBS, and discharging the seawater; facilitates the construction; and actively responds to fire or earthquake by using abundant seawater.

Description

Marine nuclear power plant and construction method {MARINE NUCLEAR PLANT AND INSTALLATION METHOD OF IT}

The present invention relates to a marine nuclear power plant and a construction method thereof, and more particularly, is a marine nuclear power plant that is not limited by the plant installation site and is easy to construct and also enables active response using abundant seawater in case of fire or earthquake. And a construction method thereof.

Nuclear power has been in the limelight as an alternative to fossil fuels, which are running out of price and rising in price.

However, nuclear power has reminded mankind of thorough safety and disaster prevention measures, as evidenced by the recent accidents at the Fukushima nuclear power plant caused by a major earthquake in the northeast of Japan.

The direct cause of the Fukushima nuclear power plant was the flooding of the nuclear power plant due to the massive tsunami following the earthquake, which immediately resulted in an accident that caused radiation leakage due to the inability of the reactor safety system and emergency generators.

Normally, onshore nuclear power plants constructed breakwater to cope with the tsunami and built a nuclear power plant in a higher area than the sea level. However, the breakwater and construction site of the large tsunami caused by the Great East Japan Earthquake were also useless.

Therefore, nuclear power plants have been researched and developed on the basis of the above-mentioned viewpoint, which is installed on the sea where the influence of earthquake and tsunami is relatively small.

However, the nuclear power plant is very heavy and bulky, and the site to be installed is also very large. The movement and installation of the plant constituting the plant to build a nuclear power plant at sea is very large. Many economic and technical constraints followed.

The present invention has been invented to improve the above problems, marine nuclear power plant and its construction that is not limited by the plant installation site, easy to install, and also proactively using abundant sea water in the event of fire or earthquake. It is to provide a method.

In order to achieve the above object, the present invention is installed in the ocean but the gravity-based structure (Gravity Base Structure, hereinafter 'GBS') surrounded by partitions on all sides; A gate provided to be opened and closed on one of the partitions; And a barge installed on the GBS and equipped with facilities including a power generation facility. The marine nuclear power plant may include a marine nuclear power plant.

The height from the bottom of the GBS to the top of the bulkhead may be higher than the height from the sea floor to the sea level.

The GBS further includes a support facility disposed on one side of the partition wall and electrically connected to the barge and connected to a pipe, and an eyepiece facility disposed on the other side of the partition wall and capable of loading and unloading a replacement fuel carrier or a waste carrier. can do.

The GBS may be made of concrete.

The gate is a primary gate that is in contact with the bottom edge of the GBS, one side is in contact with the upper edge of the primary gate, the other side is in contact with the upper edge of the partition wall, and installed inside the partition And it may include an opening and closing control room for controlling the opening and closing of the primary and secondary gates.

The pants may include a first pants equipped with a first facility including a power plant including a nuclear reactor and a turbine, and a second pants equipped with a second facility including a complex auxiliary building electrically connected to the reactor and the turbine. It includes, the first and second pants can be made of steel.

The reactor may be wrapped in concrete.

The first and second facilities may be made of steel.

The marine nuclear power plant may further include a first friction surface formed between the GBS and the seabed, and a second friction surface formed between the pants and the GBS.

In addition, according to another embodiment of the present invention, a gravity-based structure (GBS) surrounded by partitions on all sides and carries a barge (barge) equipped with facilities including a reactor and a generator to the marine installation site A first step of doing; A second step of installing the GBS on the seabed; Opening a gate provided in one of the partitions to introduce seawater into the GBS; A fourth step of moving the barge into the GBS and seating the bottom of the GBS; It may provide a method of constructing a marine nuclear power plant comprising the fifth step of closing the gate and discharge the seawater inside the GBS to the outside.

The fifth step may further include a power generation preparation process for performing electrical connection and pipe connection between a power generation auxiliary facility provided in the partition wall of the GBS and facilities of the pants after the seawater is discharged.

According to the present invention having the above-described configuration, the following effects can be achieved.

First, the present invention can conveniently transport each facility constituting a large-scale nuclear power plant separately to a plurality of pants and to the sea where a nuclear power plant is installed together with GBS.

In addition, in the present invention, the reactor building is wrapped in concrete to maintain safety, and thus, each facility constituting the nuclear power plant is disposed on the pants of steel, thereby greatly reducing the load.

In addition, the present invention by forming a friction surface between the GBS and the seabed and between the GBS and the pants, respectively, will be able to prevent damage and malfunction of the nuclear power plant by supporting the shock wave according to the earthquake when the earthquake occurs.

In addition, since the reactor is located below the sea level, the present invention may also allow emergency cooling by introducing seawater into the GBS during overheating and malfunctioning.

In addition, the present invention is because the height of the GBS is several tens of meters higher than sea level and all the facilities are placed inside the steel pants, it is also possible to maintain safety from natural disasters such as tsunamis and storms.

1 is a schematic cross-sectional view showing the overall structure of a marine nuclear power plant according to an embodiment of the present invention
2 to 5 are perspective views showing the main parts of the marine nuclear power plant according to an embodiment of the present invention
6 is a block diagram showing a construction method of a marine nuclear power plant according to an embodiment of the present invention.
7 to 10 is a perspective conceptual view sequentially showing a construction method of a marine nuclear power plant according to an embodiment of the present invention

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a cross-sectional conceptual view showing the overall structure of a marine nuclear power plant according to an embodiment of the present invention, Figures 2 to 5 is a perspective view showing each major part of the marine nuclear power plant according to an embodiment of the present invention.

For reference, FIG. 2 shows the overall structure of the first pants 400 among the pants B, which are the main parts of the present invention, and FIG. 3 is the overall structure of the second pants 500 of the pants B, which is the main parts of the present invention. 4 and 5 show the overall structure of Gravity Base Structure (hereinafter referred to as 'GBS'), which is a main part of the present invention.

As shown in the present invention, it can be seen that the configuration includes a GBS 100, a gate 200 mounted on the GBS 100, and a pants B seated on the bottom of the GBS 100.

The GBS 100 is surrounded by the partition wall 101 on all sides, the gate 200 is mounted on one of the partition walls 101 so as to be openable and closed, and provides a space where the pants B to be described later are seated. It is a structure that can be floated on the sea until it can be operated by ships such as a tugboat.

The pants (B) are mounted on the bottom of the GBS 100 by mounting various kinds of facilities constituting the marine nuclear power plant (P). It is a structure that can be operated by.

It is to be understood that the present invention may be embodied in many other specific forms without departing from the spirit or scope of the invention.

First, the GBS 100 is provided with a space in which the trousers B are seated as described above. It is preferable that the GBS 100 is made of a concrete material so as to maintain the seawater resistance and maintain durability against earthquakes and tsunamis.

The height H from the bottom surface of the GBS 100 to the upper end of the partition wall 101 is a height of the sea bottom surface of the sea bed 900 in order to protect the pants B placed inside the GBS 100 from a tsunami and a storm, (H) up to the height (h)

In addition, the marine nuclear power plant P forms a first friction surface 600 between the GBS 100 and the seabed 900, and a second friction surface 700 between the pants B and the GBS 100. By forming the first and second friction surfaces (600, 700) serves to reduce the earthquake load during the earthquake.

On the other hand, the pants (B) is preferably made of steel to reduce the load for the convenience of transportation, the first facility 410 including a power plant including a nuclear reactor (N) and a turbine (hereinafter not shown) largely And a second pants (500) mounted with the first pants (400) mounted thereon and a second facility (510) including a composite auxiliary building electrically connected to the reactor (N) and the turbine. Pants 400 and 500 are preferably made of steel.

Here, the vicinity of the reactor (N) is preferably wrapped in concrete to enable radioactive leakage and emergency response.

In this case, as the first facility 410 as shown in FIG. 2, the reactor building 411 including the reactor N, the engineering safety-related system and the associated facility zone 411 ', and the furnace coolant control system (Chemical and Volume Control Systems) ; CVCS) zone 411 ", Fusion Neutronics Source zone 411 '", main control chamber and associated facility zone 412, emergency diesel generator zone 413, Diesel oil storage tank zone 413 ', nitrogen, hydrogen storage tank zone 414, turbine building 415, transformer zone 416, reactor makeup water tank 417, carbon dioxide storage tank zone ( 418, complex building zone 419, and the like.

As the second facility 510, the office building 511, an automatic combustion control diesel generator (ACC D / G) 512, an auxiliary boiler building 513, and a boiler as illustrated in FIG. 3. Water storage tank 513 ', auxiliary boiler fuel tank 513 ", freshwater storage tank 514, condensate storage tank 511, sanitation facility water treatment facility zone 516, sewage treatment facility ( 516 '), a fire fighting pump room and a water and sewage treatment building 516 ".

The GBS 100 is disposed in the partition 101 along the formation direction of the partition 101 and electrically connected to the pants B, i.e., the first and second facilities 400 and 500, And a docking station 120 disposed at one side of the partition wall 101 and capable of loading and unloading a replacement fuel carrier or a waste carrier line.

4, the support facility 110 includes a primary cooling water heat exchanger building 111, a CCW HX BLDG 111, a primary cooling water inlet and chlorination building 112, a CW intake structure & BLDG, an essential service water intake structure 112 ', a cold machine shop 113, a spare main transformer 114, a spare unit auxiliary transformer 114 ', A spare auxiliary transformer 114' 'for standby for standby, a substation 115, a substation control building 116, and the like.

In this case, the eyepiece facility may include an eyepiece port 121 including an access path (not shown) and a heli deck 122 to allow the helicopter to be accessible as shown in FIG. 5.

Of course, it is preferable that the first and second facilities 410 and 510 are made of a steel material for convenience of transportation by reducing the load.

On the other hand, the gate 200 is connected to the bottom edge of the GBS 100 to install the GBS 100 and to allow the inflow of seawater while allowing the pants (B) to enter into the GBS 100 as shown in FIG. The primary gate 210, the secondary gate 220, which is in contact with the upper edge of the primary gate 210 and the upper edge of the partition 101, and is disposed inside the partition 101 and 1, 2. Embodiment of the structure including the opening and closing control room 230 for controlling the opening and closing of the car gate (210, 220) is of course applicable.

The primary gate 210 is to be completely opened from the GBS 100 when the first gate 210 and the second gate 220 to completely sink the GBS 100 at the sea installation site.

The secondary gate 220 is to be opened when it is necessary to introduce the seawater into the GBS 100 as an emergency action due to abnormal operation or overheating of any one of the first, second facilities (410, 510). .

The opening and closing control room 230 is an area that is electrically and mechanically connected to the primary and secondary gates 210 and 220 to monitor and control the opening and closing operations of the primary and secondary gates 210 and 220.

A method of constructing a marine nuclear power plant according to an embodiment as described above will be described with reference to FIGS. 6 to 10.

For reference, Figure 6 is a block diagram showing a construction method of a marine nuclear power plant according to an embodiment of the present invention, Figures 7 to 10 are sequentially showing the construction method of a marine nuclear power plant according to an embodiment of the present invention Isometric concept diagram.

Reference numerals not shown in FIGS. 6 to 10 refer to FIGS. 1 to 5.

The present invention installs the GBS (100) in the ocean as shown inflowing seawater into the inside, and mounting the pants (B) equipped with the facility including the reactor and generator in the GBS (100), and then introduced the seawater It can be understood that the discharge method is implemented.

The construction method of a marine nuclear power plant according to an embodiment of the present invention will be described in more detail.

First, in the first step (S1), as shown in FIG. 7, the worker carries the GBS 100 surrounded by the partition walls 101 and the pants B on which the facilities including the reactor and the generator are mounted to the marine installation site.

At this time, the gate 200 is of course blocking the interior of the GBS 100 and the sea water.

Thereafter, the worker opens the gate 200 provided in one of the partitions 101 as shown in FIG. 8 in the second step S2 to introduce seawater into the GBS 100.

Subsequently, the worker moves the pants B into the GBS 100 as shown in FIG. 9 in the third step S3 and rests on the bottom surface of the GBS 100 as shown in FIG. 10.

Finally, the operator closes the gate 200 and discharges the seawater inside the GBS 100 to the outside in the fourth step S4, and the construction of the marine nuclear power plant P is completed. .

Here, after the seawater is discharged, the power generation preparation process for performing electrical connection and piping connection between the support facility 110 provided in the partition 101 of the GBS 100 and the facilities 410, 510 of the pants (B). Further implementation will enable full-scale operation of the offshore nuclear plant (P).

As described above, the present invention provides a marine nuclear power plant and its construction method that are not limited by the plant installation site and are easy to construct, and also enable active response using abundant seawater in case of fire or earthquake. It can be seen that.

It will be apparent to those skilled in the art that many other modifications and applications are possible within the scope of the basic technical idea of the present invention.

100 ... GBS 200 ... gate
B ... pants

Claims (11)

Gravity Base Structure (GBS), installed in the ocean but surrounded by partition walls;
A gate provided to be opened and closed on one of the partitions; And
And a barge installed in the GBS and equipped with facilities including a power generation facility. The method according to claim 1,
A height from the bottom of the GBS to the top of the partition wall is higher than the height from the sea floor to the sea level. The method according to claim 1,
The GBS,
A support facility disposed on one side of the partition wall and electrically connected to the pants and connected to pipes;
The offshore nuclear power plant, which is disposed on the other side of the partition, and further comprising a docking facility for loading and unloading replacement fuel carriers or waste carriers. The method according to claim 1,
The GBS is a marine nuclear power plant, characterized in that made of concrete. The method according to claim 1,
The gate includes:
A primary gate in contact with the bottom edge of the GBS,
A secondary gate having one side connected to an upper edge of the primary gate and the other side connected to an upper edge of the partition wall;
And an open / close control room installed inside the partition to control opening and closing of the primary and secondary gates. The method according to claim 1,
The pants,
A first pant equipped with a first facility including a power generation facility including a reactor and a turbine,
A second pant equipped with a second facility including a nuclear reactor and a complex auxiliary building electrically connected to the turbine,
The first and second pants are marine nuclear power plant, characterized in that made of steel. The method of claim 6,
The nuclear power plant, characterized in that the reactor is wrapped in concrete. The method of claim 6,
The first and second facilities are marine nuclear power plants, characterized in that made of steel. The method according to claim 1,
The marine nuclear power plant,
A first friction surface formed between the GBS and the sea floor,
A marine nuclear power plant further comprising a second friction surface formed between said pants and said GBS. The first step is to transport the gravity base structure (GBS) surrounded by the bulkheads and the barges equipped with facilities including reactors and generators to the installation site of the ocean.
A second step of installing the GBS on the seabed;
Opening a gate provided in one of the partitions to introduce seawater into the GBS;
Moving the barge into the GBS and placing it on the bottom of the GBS; And
And a fifth step of closing the gate and discharging seawater inside the GBS to the outside,
The pants include a first pants on which a first facility including a power generation facility including a reactor and a turbine is mounted, and a second pile on which a second facility including a complex auxiliary building electrically connected to the reactor and the turbine is mounted A method of constructing an offshore nuclear power plant. The method of claim 10,
In the fifth step,
Further comprising a power generation preparation step of performing electrical connection and piping connection between the electricity generating auxiliary facility provided inside the bulkhead of the GBS and the facilities of the pants after the seawater is discharged.

Images