JP2024054880A - Even if an unexpected event occurs, the automatic water supply and cooling system from the lake will thoroughly protect the safety of residents and the environment. This is a small deep lake bottom nuclear reactor power generation system manufactured in a factory using AI information sharing. - Google Patents

Abstract

To start a project for manufacturing a next-generation small nuclear reactor, that is resistive to an attack, safe and brought under radioactivity control, secures safety for wastes and residents, and can be started at low cost in a short period, in units at factories by public and private sectors together as it is an urgent theme to compatibly secure electric energy sources and achieve "CN Carbon Neutral" because of the Russia-Ukraine war although it is unexpected and nuclear power stations are targeted in the war.SOLUTION: According to the present invention, a project team that solves subjects needs to be started up first. The subjects consist of: 1. development of a unit type small module nuclear reactor SMR; 2. test installation of deep underground nuclear electric power generation at a hydraulic power station lake bottom or the site of a disused mine; 3. systemization of nuclear power generation abolition and radioactivity measurement; 4. total coast calculation and comparison with other electric power; and 5. monitoring of whether radioactive contamination is caused by the use of cooling.SELECTED DRAWING: None

Description

This invention relates to small deep nuclear reactors, nuclear power plants, and their siting, which will solve all at once the various energy-related issues that have arisen, including the sudden yet recent Russian invasion of Ukraine, restrictions on fossil fuel imports, soaring international prices, carbon neutrality, SDGs, and in Japan, rising prices due to the weak yen.

The first key point of the present invention, "novelty, inventive step and special technology", can be summarized as follows:
Power generation from a small, deep lake-bottom nuclear reactor involves storing an abundance of water overhead, 365 days a year, which is like setting up a "deep-sea nuclear power plant" at a depth of 300 meters.
Even in the event of an unforeseen accident (earthquake, missile attack, power outage, explosion, tsunami, or other natural disaster), the huge amount of water stored above will automatically encase the reactor and continue to cool it. In the unlikely event of a radioactive release, it will remain sealed 300 meters underground. The water used for cooling is completely separated by pipelines and does not become radioactive. If the water temperature threatens to rise, it will be cooled and circulated by an automatic cooling device. This is truly a safety and practical idea and technical system.

The second novelty and inventive step of the present invention is that the nuclear reactor is installed at great depths underground.
The 300 meters underground location of the lake bottom deep small nuclear reactor power plant is 300 kgf/m2 at atmospheric pressure of 3 atmospheres, or 300,000 kg/m2 in water pressure, and "the reactor module is forever enveloped in a packed state of external pressure," making it not only physically but also psychologically safe as a location for the operation of invisible hazards such as radiation. There has never been a case of a nuclear power plant being installed in such a safe location before.

The third novelty and inventive step of this invention is that it can be installed and utilized at points where the power transmission and equipment transportation road infrastructure is already in place, thereby reducing installation costs and shortening construction time.
Furthermore, there are 4,500 candidate sites in Japan alone for installing small, deep lake-bottom nuclear reactor power plants (about 100 per prefecture), which would not only realize "locally produced power generation," i.e., local production and consumption of electricity, but would also be efficient in reducing transmission losses of the electricity that has already been generated.

The fourth novelty and inventive step of this invention is that it is jointly manufactured on-site and in the factory, utilizing AI and sharing information among all parties involved, including the small modular reactor that is the core of power generation and is adapted to the installation environment.
This invention uses AI to handle the entire process from machine design to completion of installation, visualizing and imaging the installation location and space as a virtual space, and using an "AI plus image recognition AI solution" to analyze the location and environmental conditions, all parties involved in machinery, construction, civil engineering, electricity, heavy electrical equipment, nuclear power, environmental protection, agriculture, etc. can share information and complete the plant in a short period of time.
The module is an integrated package including a pressure vessel, steam generator, pressurizer, and containment vessel, and can be simply assembled on-site, just like a plastic model. These achieve triple composite safety: underwater, underground, small size, and high performance. Examples of locations for this invention include the lake bottom of a hydroelectric dam, mines, tunnels, abandoned mines, and lakes and marshes. This invention can also deal with unforeseen accidents such as cooling water leaks, radiation leaks, natural disasters, earthquakes, tsunamis, missile attacks, and fires, which have long been issues with nuclear power generation.

The structure of this invention is a small modular reactor (SMR) that is similar to a prefabricated house, with the main equipment manufactured in advance in a factory and then installed on-site. It is installed deep underground or at the bottom of a lake (land or sea), and AI and robots are used to automatically control operation, refuel, and maintain radioactive waste.

The advantages of this invention can be summarized as follows: 1. Almost absolutely safe power generation 300 meters underground, giving peace of mind to local residents; 2. No adverse effects on the air, water, soil, or CO2 environment; 3. Can be completed in a short period of time; 4. Low-cost power generation; 5. Complete isolation from radiation; 6. Radioactive waste can be stored at great depths as is; 7. Use of existing infrastructure such as power lines and roads; 8. Protection of energy sources from unforeseen circumstances such as unforeseen accidents, natural disasters, and attacks from other countries; 9. Realization of low-cost electricity; 10. "Creation of a new industry that can encourage the participation of thousands of related companies."

In this invention, we consider dormant infrastructure as 1. hydroelectric power plants, 2. coal mines and coal mine ruins, 3. lakes and water facilities, and 4. rivers and flood control, and believe that these can be utilized for next-generation power generation.
In this invention, the infrastructural heritage refers to hydroelectric power plants, coal mines, subways, underground shopping malls, and other structures that symbolize Japan's industries dating back to the Edo period and the postwar reconstruction of the country.
This invention concerns the installation of small modular nuclear reactors (SMRs) on the lake bottom or in close proximity to the 2,494 hydroelectric power plants that were built in the 1900s and are still in operation and are scattered across the country.
The site of this invention can select a suitable site for installing a small nuclear reactor from about 2,500 locations. The "lake bottom location of hydroelectric power generation and collaboration between power generation plants" of this invention is an invention that has not been reported yet.

The lake bottom where the hydroelectric power plant is located is an ideal and safe location for a small modular reactor (SMR) with an output of 60,000 kW (525.6 million KWh) per module, which is 1/20 the power output of a normal pressurized water reactor. The following shows how collaboration with 2,494 hydroelectric power plants is an invention and groundbreaking.
1. Hydroelectric power plants always have water available to cool the reactors. (Advantage 1)
2. The water in the hydroelectric power station (dam type) can be drained. During the construction of the small nuclear reactor, the inflowing water can be diverted through a pipeline, making it possible to carry out the construction underground on dry ground and bury the power generating unit. (Advantage 2)
3. By digging an underground tunnel from a nearby location, or by draining the water for a certain period of time and burying a small modular reactor (SMR) deep underground in the lake bottom and then filling it with water, the small reactor can be safely cooled, and the circulating water for cooling will not be contaminated with radiation and can be safely used as drinking water downstream. At the same time, since it is located underground in the lake bottom, it is highly defensible against attacks from external enemies. (Advantage 3)
4. The control building for the entire power plant will be controlled by AI and robots and will be located nearby. In the unlikely event of an unimaginable disaster or attack that could lead to a radiation leak, it can simply be buried in concrete. (Advantage 4)
5. Radioactive waste is easy and safe to process. First of all, it is always underwater and stored deep underground, so there is no risk of exposure to radiation. (Advantage 5)
6. Even if a hydroelectric power plant is located deep in the mountains, the roads built during construction allow it to be used immediately, leading to cost savings and time savings. (Advantage 6)
7. Hydroelectric power plants already have transmission lines and transformer facilities, so they can be used immediately. (Advantage 7)
8. In the event of an emergency, hydroelectric power and nuclear power can be used interchangeably. For example, at night when electricity demand is low, electricity generated by nuclear power can be used to pump up the water stored below and generate electricity during the day. (Advantage 8)
9. Small modular reactors are divided into parts like plastic models. One module is an integrated package including the "pressure vessel,""steamgenerator,""compressor," and "containment vessel." When replacing uranium fuel rods, the entire package, which is sealed off from radiation, is replaced using a robot. The importance of "cooling water" is well known from the Fukushima nuclear accident, so it is easy to gain the understanding of residents for "installing a small modular reactor at the bottom of a deep lake in a dam." Images of hydrogen explosions at the Fukushima nuclear power plant have been repeatedly broadcast, so a certain degree of understanding of residents will likely be gained, but a safety simulation of a dam embankment collapse should also be prepared.

The next gist of this invention, "location," is to install small nuclear reactors deep underground in over 2,000 "mines" and "former mine sites" across the country where mining has been carried out since the Edo period, symbolized by the golden land of "Zipangu," and to establish safe nuclear power plants without incurring initial costs.
For example, there are about 2,000 mines and abandoned mines in Japan that are considered to be suitable sites for underground nuclear power plants. There is no prefecture without mines, so it is easy to choose a site for installing a small nuclear reactor deep underground, which will solve the concerns about nuclear power generation mentioned in 0009 below.
1. There are tunnels in the mine. Tunnel is usually dug deep underground or deep into the mountains. In other words, "roads", "elevators" and "trolley tracks" are already installed. Not only does it not require additional costs to install a small nuclear reactor unit, but it is expected to significantly shorten the construction period.
2. In the case of open-cut mining, a small or large reactor can be buried in the same way using the "cut and cover method" (a method of burying or building a structure and then backfilling with soil or concrete) to create a deep reactor or nuclear power plant.
3. This construction method makes use of the methods used to build subways and underground shopping malls. The advantages of a deep underground nuclear power plant are basically the same as those of a "lake bottom for hydroelectric power generation," but the procurement of cooling water must take into account the proximity of "lakes, marshes," and "rivers."
4. By the way, there are 226 lakes and marshes in Japan, and 126 large rivers. Recently, research has been progressing on the use of sodium chloride solution, which has a low freezing temperature, so that cooling water is not necessarily required to cool small nuclear reactors.

The third gist of this invention is a modular small nuclear power plant that can generate electricity in the shortest time possible by making use of dormant 20th century infrastructure, and the installation of small reactor units in lakes, irrigation ponds, reservoirs, and swamps. For example, Japan has 226 large lakes and ponds that are always filled with water that can be used for cooling, and at the same time protect them from attack by foreign enemies. While it is difficult to install facilities within rivers, it is possible to do so under the sea or in lakes and ponds. In that case, the construction method is the same as for undersea tunnels, where a tunnel is excavated, the unit is submerged, and it is extended and connected to the aboveground part. This is also a type of deep underground nuclear power plant according to this invention.

The following is one example of the "Small Modular Reactor" (SMR), the main focus of this invention: List icon The output of one module is 60,000 kW, about 1/20 of that of a normal "pressurized water" reactor, List icon and up to 12 modules are installed in a large pool.
List icon One module is an integrated package that includes the "pressure vessel,""steamgenerator,""compressor," and "containment vessel," eliminating the need for large cooling water pumps or large-diameter piping. List icon Each module is connected to an independent turbine generator and condenser, List icon and the risk of a large-scale loss of coolant accident can be avoided by making the modules compact and integrating them.

Recently, the sudden Russian invasion of Ukraine has completely changed the world's energy policies. At the same time, we have entered an era in which we must also take into consideration the CN (carbon neutral) SDGs.
The ultra-deep nuclear power generation of the present invention will address and solve the above two problems head on. With this political and economic background, research into miniaturization of nuclear power generation is progressing. One representative example is the "small modular reactor." Also called SMR (Small Modular Reactor), development is underway in various countries around the world. Its characteristics can be expressed in three keywords: "small,""modular," and "multipurpose." When a nuclear reactor is made "small," it becomes easier to cool than a large one. Technically speaking, this phenomenon occurs because a small reactor has a large surface area relative to its volume. By taking this characteristic to its limits, it will become possible to cool the reactor naturally without having to pump water into it to cool it.

No matter how safe it may be, for people who have actually seen the Chernobyl, Three Mile Island, and Fukushima nuclear accidents on TV, the fear and allergies to "invisible radiation and radiation exposure" will not easily go away.
At the same time, decarbonization, carbon neutrality, and SDGs are also urgent issues that need to be resolved. Also, the more the much-talked-about EV (electric vehicle) becomes popular, the more important the fuel, electric energy, will become, not decrease.
In light of the above concerns, the advantages of the key point of this invention, "burial installation underground," are: 1. isolation from radioactivity, 2. radioactive waste is stored at great depths, 3. utilization of existing infrastructure such as power lines and roads, 4. protection of energy sources from unforeseen circumstances such as unexpected accidents, natural disasters, and attacks from other countries, 5. realization of low-cost electricity, etc.
The future challenges for energy will be 1) low cost, 2) decarbonization, 3) independence from Russia (reducing dependence on fossil fuels), 4) safety (taking into account not only natural disasters but also war), 5) stable supply, 6) time saving (quick start of construction to transmission of electricity/unitization), and 7) sharing of existing infrastructure.

If this could be realized, not only would safety be improved, but the entire reactor structure could be simplified, making maintenance easier. As a result, costs could be reduced and economic efficiency could be improved. This invention aims to achieve this goal. It also takes into consideration the miniaturization of the reactor, thorough cooling measures, and cost competition with other types of power.
Although the recent Russian invasion of Ukraine was sudden, it has forced Western society to respond by restricting or banning the import of fossil energy, searching for alternative suppliers, and switching to alternative energy sources. The major energy source, after coal and oil, is LNG (liquefied natural gas). In particular, EU countries have been forced to give up on LNG pipeline facilities from Russia and, although they will continue to import a certain amount for the time being, they have been forced to adopt a policy of embargo in the medium to long term. Energy issues are urgent issues around the world, and coupled with the SDGs and CN (carbon neutrality), moving away from fossil fuels has become a global issue.

Not only are domestic coal-fired power plants being restarted, but nuclear power plants that had been decided to be decommissioned continuing, and the construction of new nuclear power plants has been announced one after another, starting with Germany and the UK. It appears that the zero carbon dioxide emissions of nuclear power generation have been reevaluated. There is no doubt that the ultra-deep nuclear power generation of this invention will bring great benefits to the establishment of new nuclear power plants.
As was the case with the recent sudden Russian invasion of Ukraine, nuclear power plants are likely to be the first targets of attacks. Considering the threat of a nuclear explosion, the control of electricity, and the significant and long-term impact on the region, it is only natural that they would be the first targets of attacks. In the future, nuclear power generation will need to consider not only the inherent risks that have existed up until now, but also defense against external enemies.

Until now, nuclear power plants have been constructed on-site as individual units, which has tended to result in long construction times. They have also undergone multiple inspection and approval tests to ensure quality. However, the situation is beginning to change with the arrival of the idea of making the most of "modular construction" methods, similar to assembling plastic models. This is a method in which regulations and design approval are obtained through a method known as "type certification," and the entire plant is "produced in a factory + assembled + transported + installed" all at once. This is exactly like a prefabricated house, and this "method/small modular construction nuclear reactor" is one of the foundations of this invention.
In this case, the first step would be to "downsize" the reactor to a size that can be transported (by rail or highway in the United States, or by inland canal in Europe), and then the reactor output would be determined.

On the other hand, when it comes to nuclear power plants, there is strong psychological resistance to them. There are the emotions of local residents, opposition movements, radioactive leaks, the constant need for large amounts of cooling water, and the fact that they are often located on coastal areas in case of an accident, which makes them easy targets for attack. The ultra-deep nuclear power plant of this invention invents and proposes concrete methods for dealing with safety defenses, radioactive waste, cooling water, nuclear reactors, etc.

In many cases, the problems, concerns, and issues that need to be overcome with nuclear power generation and nuclear power plants can be summarized as follows:
1. Safety against accidents (earthquakes, tsunamis, natural disasters, typhoons, explosions, meltdowns, targeting of external attacks, marine pollution, water pollution, soil pollution, air pollution, radiation exposure, etc.)
2. Radioactive contamination (environmental issues, food, damage to reputations, ocean dumping, crops, livestock, etc.) Number of years of operation (it is said to be 40 or 50 years, but what will happen to decommissioning after that?
3. Radioactive waste (effective half-life of tritium, iodine 131/7 days, cesium 134/88 days, cesium 137/99 days, strontium 90/18 years, plutonium 229/20 years)
4. Length of radioactive decay period (Tritium, Iodine 131/8 days, Cesium 134/2 years, Cesium 137/30 years, Strontium 90/29 years, Plutonium 229/24,000 years...physical half-life)
5. How to dispose of radioactive waste (after processing, it is sealed and dumped 300 meters underground, due to earthquakes and crustal movements)
6. Cooling water (without a large amount of water, an explosion like the Fukushima nuclear power plant would occur)
7. Location (consent and consent must be obtained from many stakeholders, including local residents and local governments)
8. Uranium procurement (import procedures, transportation, storage, etc.)
9. Infrastructure 1: Architecture, machinery, equipment, reactors, generators, structures, buildings, pipelines, warehouses 10. Infrastructure 2: Reactor buildings, turbine buildings, waste buildings, various service buildings, control room buildings, etc.

Any mistake in any of the above could result in major problems. Major problems are issues that involve human life, and are significantly different from solar and wind power generation in terms of the level of danger. In other words, all of the problems with nuclear power generation can be summed up as follows: 1. "Eliminating the danger," 2. "Reducing the level of danger as much as possible," and 3. "Stable operation." At the same time, we must continue to operate nuclear power generation, the greatest discovery of civilization with the highest efficiency, smoothly. The gist of this invention is to achieve the above three points.

The gist of the present invention is to solve the above problems all at once.
The present invention specifically describes the following 10 problems, which serve as "proof of invention."
1. Why is "deep-depth nuclear power generation" needed? (New and advanced advantages)
2. What is the economic viability of the location? (Nuclear power plants require huge amounts of money to build.)
3. What are the advantages of maintenance? (Use of AI and robots)
4. What about considerations for the surrounding area and the environment, such as SDGs, CN (carbon neutral), interest groups, measures for residents, and environmental measures? (Comparison with the past / Rumors / Radiation leaks / CO2)
5. What about cooling water? (A large amount of cooling water is required 24 hours a day and is absolutely essential.)
6. What is the process for radioactive waste and decommissioning? (Buried in glass storage containers 300 meters underground)
7. What are the advantages of building layout? (Reactor building, turbine building, waste building, various service buildings, control room building, etc.)
8. What about equipment and suppliers? (International patents revive domestic industry)
9. How do we respond to natural disasters and attacks from abroad? (earthquakes, tsunamis, typhoons, missile attacks, etc.)
10. What about power generation, stable supply, and transmission? (Cost performance calculations include accident risk response costs, policy costs, CO2 countermeasure costs, fuel costs, operation and maintenance costs, and capital costs)

The "ultra-deep nuclear power plant" of this invention refers to a very deep underground power plant where the reactor is installed about 30 to 300 meters underground. The Earth's outer crust is about 30 kilometers deep, and the deepest borehole recorded to date was 12 kilometers deep in Russia. Furthermore, earthquakes commonly occur about 70 kilometers underground, so in comparison, it may not be possible to call this "ultra-deep or very deep."

Application 2012-208492 (2012/09/21) Publication 2014-062830 (2014/04/10) International Patent Classification (IPC): G21C7/30 FI: G21C7/30 Application 2013-104170 (2013/05/16) Publication 2014-224764 (2014/12/04) International Patent Classification (IPC): G21C7/28 FI: G21C7/28 Application JP2012008124 (2012/12/19) Publication WO2013094196 (2013/06/27) International Patent Classification (IPC): G21C1/02 G21C3/60 G21C7/28 G21D1/00 G21D5/14 FI: G21C1/02 A G21C3/60 G21C7/28 G21D1/00 Q G21D5/14 Application 2016-019801 (2016/02/04) Published 2016-145828 (2016/08/12) International Patent Classification (IPC): G21D5/02 F01K9/02 F01D25/24 F01K9/00 F01D25/26 FI: G21D5/02 F01K9/02 F01D25/24 K F01K9/00 B F01D25/26 Z Application 2012-237886 (2012/10/29) Publication 2014-089067 (2014/05/15) International Patent Classification (IPC): G21C7/28 G21C9/02 FI: G21C7/28 G21C9/02 Z Application 2015-509007 (2013/04/11) Published 2015-519552 (2015/07/09) International Patent Classification (IPC): G21C1/08 G21C13/00 G21C13/028 G21C17/02 FI: G21C1/08 G21C13/00 A G21C13/02 F G21C17/02 E Application 2009-299507 (2009/12/21) Publication 2011-128129 (2011/06/30) International Patent Classification (IPC): G21C1/00 G21C13/00 G21C17/003 G21F9/30 FI: G21C1/00 A G21C13/00 D G21C17/00 E G21F9/30 535A Application 2016-507542 (2014/03/07) Publication 2016-514847 (2016/05/23) International Patent Classification (IPC): G21C17/10 FI: G21C17/10 Y Application 2007-138419 (2007/04/24) Publication 2008-268163 (2008/11/06) International Patent Classification (IPC): G21C1/00 FI: G21C1/00 C Application 2013-531614 (2011/09/08) Publication 2014-510897 (2014/05/01) International Patent Classification (IPC): G21C1/32 G21C1/08 G21D1/00 FI: G21C1/32 G21C1/08 G21D1/00 S Application 2007-187505 (2007/07/18) Publication 2009-024368 (2009/02/05) International Patent Classification (IPC): E21D9/04 E21D9/00 E21D13/02 G21F1/02 G21F9/34 G21F9/36 1-20 of 655 itemsTotal: 655 itemsCentral Research Institute of Electric Power Industry and Toshiba jointly develop small nuclear reactors and make a comeback in the US Small reactors will pave the way for the age of distributed power sourcesName: Monthly Energy (Energy)Volume: 38 Issue: 4 Pages: 8-9 Publication year: April 1, 2005 The Charm of Small Nuclear Reactors and Their Development Trends Overview The Charm of Small Nuclear ReactorsClipAuthor (1): Hiroyuki Torii (Nihon Keizai Shimbun)Material Name: Electrical ReviewVolume: 86 Issue: 6 Pages: 11-15 Publication Year: June 10, 2001 Developmental processes and future of small-to-medium-sized nuclear reactors. From small-to-medium-sized nuclear reactors to those of the future. Thermo-hydraulic experimental validation of an integrated modular small reactor operating in full power natural circulation Study on ultra-small nuclear reactor for heat supply (11) Study on dynamic stability of deep underground cavern The 21st century is also here in the basements of buildings in Tokyo... The era of small nuclear reactors with ultimate safety The PSRD small light water reactor for use in consumer areas, deep underground, on offshore barges, etc.

This invention is a small modular reactor (SMR) (an integrated package including a pressure vessel, steam generator, pressurizer, and containment vessel) that can be assembled as easily as assembling a plastic model and generates electricity. It is buried deep underground at the bottom of a hydroelectric power plant or an abandoned mine, which is safe under any circumstances, reducing installation costs, providing the lowest power generation costs, shortening the time to completion, and solving the problems of CN (carbon neutral), SDGs, and moving away from Russia.

The embodiment for implementing this invention is to operate a small nuclear reactor deep underground, which does not require large cooling water pumps or large diameter piping, or has an external piping circulation system and therefore has no risk of radioactive leakage, making it much safer than locating it on land or along coastal areas, and also making it easier to manage nuclear waste.

The following issues will be solved simultaneously by each team, including outsourcing.
1) Completion of the Small Modular Reactor (SMR).
2) Testing deep installation 3) Mass production of modular units 4) Test mining 30-100 meters into the bottom of the hydroelectric dam lake 5) Selection of a site in an abandoned mine where small modular reactors can be embedded 6) Feasibility of open-cut construction methods 7) Verification of installation, power generation, power transmission, running costs, radiation, and impact on drinking water 8) Power generation costs 9) AI, robots, fuel rod replacement, removal and burial of radioactive waste 10) Discussions with residents and stakeholders

Japan can take the lead in the field of small nuclear reactors and small nuclear power generation, where the global development race is intensifying. When it comes to nuclear power, China, Russia, France, and the United States are the major players, but the nuclear power generation using the deep underwater small nuclear reactor of this invention can break into this hundreds of trillion yen market.

A tunnel will be dug 300 meters below the lake bottom to install the generator. Hydroelectric power plant dam is a good location The world is competing to develop small nuclear reactor power generation modules There are many suitable sites in Japan, and they do not affect the scenery, drinking water, or agricultural water. Total scheme of the present invention The already completed power line A single screw, equipment, parts, machinery, reactors, peripheral devices, and modules are all factory produced. 300 meters underground is safe from earthquakes and missiles AI will analyze the project from planning to parts, module production, and the location environment, and everyone will share information through virtual reality. It's also good to wear goggles and watch realistic mountains and underwater scenes in the video. Japan's nuclear power plants are all located in places that are vulnerable to missile attacks. Various methods for generating electricity from small deep lake-bottom nuclear reactors Solar power generation, which has low power generation efficiency, is not suitable for Japan, where there is little flat land. Japan is a mountainous country so tunnel construction is a piece of cake, even the subways are deep. Abandoned mine sites are also suitable locations The water in the ceiling is a safety valve in case of emergency, and of course it is used with normal cooling water. Radioactivity decay period

The goal of inputting an image from outside the housing or from a position as close to the housing end as possible has been achieved with a minimum number of parts and without compromising the thickness of the optical system components.

In one embodiment of the present invention, a small nuclear reactor unit is installed underground at the bottom of a dam lake at a hydroelectric power plant, and operation and maintenance are controlled by AI and robots. Once the small nuclear reactor unit is operational, it generates electricity stably, so it can generate electricity for decades with manual operations.
The advantages of "burial installation underground," the key point of this invention, are: 1. isolation from radioactivity, 2. radioactive waste is stored at great depths, 3. utilization of existing infrastructure such as power lines and roads, 4. protection of energy sources from unforeseen circumstances such as unexpected accidents, natural disasters, and attacks from other countries, 5. realization of low-cost electricity, etc.

An example of how to implement this invention is to develop technology that allows small nuclear reactors and other small modular reactors (SMRs) to be assembled as easily as plastic models, and to manufacture them in a factory like a prefabricated house. At the same time, it is important to develop the hardware and software technologies for the individual components and building structure.

The embodiment for carrying out the present invention is to actually operate underground as a system that realizes triple synthesis safety by being underwater, underground, and compact and highly efficient. Moreover, environmental consideration is essential for carbon dioxide-free nuclear power generation, which is advantageous in terms of cost comparison and requires constant risk assessment.

The industrial applicability of this invention is that it can revitalize a wide range of industries, including the housing, machinery, and power industries, by using technology based on the world's first invention idea.

1. SMR (Small Modular Reactor)
2. The M in MWt and MWe stands for million

Claims (8)

The first aspect of the present invention takes advantage of the advantages of nuclear power generation, such as carbon dioxide emission and low-cost power generation, while addressing the negative aspects of nuclear power generation, such as radiation leakage, waste disposal, the possibility of serious damage from accidents, the huge cost of new construction and long construction period, the public's fear of nuclear power plants, the location being an easy target for missiles, and concerns about natural disasters and earthquakes, by: 1) installing the plant at a great depth underground on the bottom of a lake, automatically starting the regular water supply, automatically starting the cooling system, and storing the radioactive waste using robots in terms of safety; 2) sealing the plant using the air pressure and water pressure of the machinery and facility installation site in terms of the environment; thorough measures to ensure public safety, such as having only the substation and transmission departments come above ground, a local brand for electricity, and local production and consumption; and 3) by sharing AI virtual images with all related companies, producing modular small nuclear power generation units like plastic models in a factory that takes into account the installation environment, installation location, required power for transmission, and available conventional infrastructure, to achieve low-cost power generation at a great depth of a lake in a short period of time. As a dependent claim of claim 1, a safety device that uses temperature sensing sensor technology to supply large amounts of water from the water storage above the facility in the event of an accident or trouble occurring at the reactor, and if the water temperature rises further, an automatic cooling device is activated to protect the reactor. As a dependent claim of claim 1, spent nuclear fuel must be stored as radioactive waste in a safe location (e.g., 300 meters underground) for several decades, but the deep lake bottom small nuclear reactor power plant of the present invention is already 300 meters underground, and a robotic arm device is attached and operated from the ground to safely move it to a storage location. A radioactive waste moving device. As a dependent claim of claim 1, the location 300 meters underground is such that both atmospheric and water pressure are several to several tens of times greater, compressing everything. A small nuclear power generation module that takes advantage of this environment to prevent radiation leaks from equipment surrounding the reactor. A dependent claim of claim 1 is a business model that states that existing infrastructure such as power lines, roads, elevators, and substations can be used to install a small, deep lake-bottom nuclear reactor power plant, reducing construction costs and shortening construction times. As a dependent claim of claim 1, the present invention enables locally-based power generation, such as locally produced and locally consumed electricity and hometown-branded electricity. In such cases, the establishment and operation of the company can be carried out as a private company, with funds created by local financial institutions, local governments, related businesses, and citizens. This is the business model of a locally-based power generation and distribution company. As a dependent claim of claim 1, a business model for small nuclear reactor power generation equipment is that an installation environment model is quantified using AI, each location is input, and the AI is used to calculate the optimal installation method and modules, and at the same time, the virtual reality image is shared by everyone from related parts manufacturers to architectural and civil engineering companies and power distribution companies, and ultimately, the equipment is assembled into a plastic model-style small nuclear power generation unit, reducing construction costs and shortening construction time. As a dependent claim of claim 1, a method for digging deep underground without interfering with the use of the lake bottom for drinking water, agricultural water, etc., in which a tunnel excavation site is secured in a nearby location from the beginning, and then digging is started from there, aiming for approximately 300 meters below the lake bottom, and after installing the tunnel underground at the lake bottom, a water supply pipe is driven in from above to connect it to the upper control room, and a small deep lake bottom nuclear reactor installation method is described.

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