JP2001013282A - City proximity nuclear power plant - Google Patents

Abstract

PROBLEM TO BE SOLVED: To bring closer to a city by driving and generating a mixed medium turbine by a high-temperature mixed medium from a heat exchanger, exchanging heat with it for taking out as an energy, and generating a refrigerant by a refrigerant generation system. SOLUTION: In a reactor, light water 1b of a cooling material is heated by a fuel assembly 3, is sent to a heat exchanger 5 as saturation steam, is subjected to heat exchange with mixed medium liquid from a mixed medium generation system 7, and descends due to a density difference and flows back to the entrance side of the fuel assembly 3. A mixed medium turbine 10 is driven and power is generated by a generator 11 due to high-concentration mixed refrigerant steam being separated by a high- pressure separator 9. The heat of a low-concentration mixed medium being separated by the high-pressure separator 9 is collected, concentration difference energy is generated by a concentration difference energy-manufacturing system 8, high-concentration and low-concentration mixed medium liquid is carried for a long distance, a refrigerant is generated by a refrigerant-manufacturing system and is supplied for refrigeration, thus achieving generation with high electrical conversion efficiency, improving safety since a double circuit is adopted, and achieving construction closer to a demanding area.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nuclear power plant for supplying heat energy and electric energy to a city, and more particularly to a combination of an intrinsically safe nuclear reactor system, a mixed medium power generation system, a concentration difference energy production system, and the like. The present invention relates to a nuclear power plant located near a city, which enables high-density energy transportation.

[0002]

2. Description of the Related Art In recent years, economic development has been supported by personal consumption, such as the enlargement of home appliances and the spread of air conditioning, and the demand for electric power has been steadily increasing for both industrial and consumer use. Of these power demands, many are converted to cold heat and used for cooling.

[0003] In Japan, the use of heat requires more cooling than in Europe and the United States, and therefore, transportation of cold heat is important. In this case, it is necessary to increase the heat transport density, and a high-density cold transport method using an ice slurry has been developed, but the economic transport distance is about several hundred meters. Since the transportation of about 30 km can be performed economically by using hot water or steam, a method of transporting with hot water or steam to obtain cold heat by an absorption refrigerator is used.

[0004] In the case of heat transport, the transportable distance is determined by comparing the amount of heat radiation, the transport power, the amount of energy that can be transported, and the cost of electrical energy. Energy demand fluctuates between daytime and nighttime. If the heat supply is also adapted to this, the transport speed in the case of liquid is about 3 m / s and the transport speed in the case of vapor is about 50 m / s. 30km for steam transport
Is a distance at which the rise time is noticeable.

At present, as a power generation method having high thermal efficiency, a gas turbine is driven by high-temperature and high-pressure combustion gas obtained by burning natural gas, and steam is generated by high-temperature gas discharged from the gas turbine. , And its combined thermal efficiency is 40-50%.

On the other hand, although the power generation efficiency is low, turbine extraction for coal-fired power generation and heavy oil-fired power generation is performed, steam or hot water is produced by a heat exchanger, and 30 km
2. Description of the Related Art A cogeneration system that transports heat for a certain distance to supply heat and generate power at the same time is known. When this cogeneration is adopted, the thermal efficiency becomes 60 to 80%.

[0007] In the case of utilizing heat by performing turbine bleeding in a 1 MW class boiling water nuclear power plant, it is necessary to reduce the total thermal efficiency to about 61.4% with a power generation output (776 MWe) and a heat output (1245 MWt). It is possible to greatly improve the heat utilization efficiency as compared with 33.4% in the case of only power generation.

[0008] Since electric energy and heat energy are used as a method of utilizing energy, the amount of unused waste heat with respect to the global environment can be greatly reduced by employing this cogeneration.

[0009] As an example of thermoelectric power generation in Japan, 600,000 kW of heavy oil burning Hainan power plant at Wakayama Marina City
30t / h steam obtained by performing heat exchange with steam extracted from the turbine of the turbine generator is supplied to an absorption refrigerator, and the cold heat and the steam are directly supplied to hotels, houses, and sports facilities. There is an example.

Conventionally, for example, in Japanese Patent Application Laid-Open No. 9-209716 and Japanese Patent Publication No. 4-27367, a steam turbine driven by steam generated by a heat source and a gas turbine heated by exhaust gas from the steam turbine are disclosed. High thermal efficiency power generation combining a mixed-medium turbine driven by a mixed medium and a water-ammonia mixed-medium cycle having a condensate transport means for transporting condensate of exhaust gas from the mixed medium turbine to heat exchange means A plant is disclosed.

In this mixed medium cycle, a mixed medium turbine is mounted in place of the refrigerant production section of the absorption refrigerator to generate electric power. Can be constructed using

Akizawa et al. Have proposed a room temperature heat transport system in which mixed media having different concentration differences are manufactured and transported over a long distance to obtain cold and warm heat.

Most power plants in Japan are located on the coast, and large cities are also located on the coast. When electricity and heat are transported from this power plant to consumption areas in large cities, electric power is transmitted at a high voltage by constructing steel towers. For heat transport, pipelines are buried underground to transport hot water or steam.

In the case of securing land under a road for filling a pipeline underground in a large city, priority is given to laying pipes for electric power, water supply, sewerage, gas, etc. There is no room for pipe laying. Although there is a method of putting the heat supply pipe in the common groove, there is a problem that the heat supply pipe cannot be put in the common groove under the current law.

In recent years, underwater tunnel technology has been developed. Using this technology, underwater tunnels can be laid from power plants to large cities. Because factory production is available, it can be built at low cost in a short time.

Due to the progress of the shield method, a deep tunnel can be efficiently and economically excavated. There is no problem of land acquisition from the coast to the heat supply center in the center of the city, and a deep underground tunnel can be constructed in the shortest distance.

Incidentally, the Swedish ASEA-AT
By OM, PIUS (Proce
ss Inherent Ultimate Safe
ty) was proposed. The primary system containing the reactor water is installed in a large volume of boron pool water, and the primary system water (290 ° C) and the boron pool water (50 ° C) have a balanced pressure during steady operation and are installed vertically. It is a configuration that is isolated by a density lock. In the event of a loss of water supply to the steam generator, the heat sink disappears, so the temperature of the primary system water rises, the circulation flow velocity increases, and the pressure on the primary side drops. Flows into the pool and a natural circulation is established with the pool, so that the furnace shutdown and decay heat removal can be maintained without any active operation. Since the steam generator is installed inside the furnace vessel and large-diameter piping is eliminated to prevent large LOCA (coolant loss accident), the reactor flood can be maintained for one week.

A PIUS BWR has been proposed by Forsberg of ORNL. In the case of BWR, bubbles are generated due to boiling in the core, and the density balance is lost. Furthermore, since the recirculation pump is eliminated and the natural circulation method is adopted, the length of the water layer above the core is large and the density balance is promoted. And the primary system are isolated.

Further, a steam-cooled reactor has been proposed by Schults et al., Which has inherent safety and aims at improving thermal efficiency. Cool the core with steam and operate at the steam density that maximizes reactivity. In order to ensure inherent safety, the core and steam supply system are integrated into a boron pool, and the primary system and the pool are separated by a vertical density lock.

Further, Sefidash proposes a fluidized bed type PWR in which a spherical fuel is rolled up by a primary coolant and caused to flow to make the fuel distribution suitable for a nuclear reaction, and the operation is carried out. When the recirculation pump stops and there is no more fuel dispersing power, the fuel descends and deposits, stopping the nuclear reaction.

[0021]

The nuclear power plant has a feature that the construction cost is high but the fuel cost is low as compared with the fossil fuel-fired power plant, and thus the power generation system is low in total power generation cost. Because the thermal efficiency of nuclear power plants is significantly lower than that of fossil-fired thermal power plants, large amounts of waste heat are discharged into the environment.

Since energy demand includes electric energy and heat energy, overall heat efficiency can be improved by performing turbine bleeding of a nuclear power plant with poor electric conversion efficiency and utilizing heat, thereby improving the environment. Unused waste heat can be reduced.

However, since the location of the nuclear power plant is far from the metropolis, it is difficult to carry out heat transport.

The present invention has been made in view of such circumstances, and enables a nuclear reactor system capable of approaching a city, a high-density energy transportation technology at room temperature, and a city capable of solving the above-described problems. The purpose is to provide a nearby nuclear power plant.

[0025]

In order to achieve the above object, according to the first aspect of the present invention, a fuel assembly is installed in a reactor pressure vessel to form a core in which coolant circulates naturally, An integrated natural circulation BWR in which a control rod drive mechanism is installed above the reactor pressure vessel and a heat exchanger for exchanging heat between the mixed medium and heat generated in the core is provided above the reactor pressure vessel It has a reactor system and a high-pressure separator that introduces a high-temperature mixed medium from the heat exchanger of the reactor system, and drives a mixed-medium turbine with high-concentration mixed-media steam separated by the high-pressure separator to generate electricity. On the other hand, the low-concentration mixed medium liquid separated by the high-pressure separator is subjected to heat exchange with another system medium by a heat exchanger, and then mixed with the high-concentration mixed medium vapor supplied for power generation to return the liquid. age,
A mixed-medium power generation system that circulates through the heat exchanger of the reactor system, and a medium-concentration mixed medium is applied as another system medium heated by the heat exchanger of the mixed-medium power generation system. The high-concentration mixed medium vapor and the low-concentration mixed medium liquid are separated by a pressure separator, and the high-concentration mixed medium vapor and the low-concentration mixed medium liquid are condensed and heat-exchanged, respectively, and the concentration difference energy extracted as energy to the outside A production system, and a refrigerant generation system that generates a refrigerant by adiabatically expanding the high-concentration mixed medium liquid conveyed from the concentration difference energy production system, and uses the refrigerant generated by the refrigerant generation system to generate ice. Provided is a near-city nuclear power plant characterized in that production or generation of hot water is enabled.

According to a second aspect of the present invention, in the near-city nuclear power plant according to the first aspect, a water-ammonia mixed medium is used as a mixed medium used in a mixed-medium power generation system or a concentration difference energy production system. Provide a nuclear plant.

According to a third aspect of the present invention, in the near-urban nuclear power plant according to the first aspect, a mixed-medium power generation system,
A high concentration mixed medium pipe, a medium concentration mixed medium pipe or a low concentration mixed medium pipe is provided between the concentration difference energy production system or the heat supply unit, and these pipes are provided with a storage function. Provide a plant.

According to a fourth aspect of the present invention, in the close-to-urban nuclear power plant according to the third aspect, the high concentration mixed medium piping, the medium concentration mixed medium piping or the low concentration mixed medium piping is a deep underground piping. To provide a nuclear power plant near the city.

According to a fifth aspect of the present invention, there is provided a near-city nuclear power plant according to the first aspect, wherein deep cold seawater is used for cooling the condensate of the mixed-medium power generation system.

According to a sixth aspect of the present invention, in the near-city nuclear power plant according to the first aspect, the exhaust at the outlet of the mixed-medium turbine of the mixed-medium power generation system is cooled by a refrigerant. provide.

According to the invention of claim 7, in the near-city nuclear power plant according to claim 1, a heat exchanger is installed at an outlet of the mixed medium turbine of the mixed medium power generation system, and a refrigerant is caused to flow through a heat exchange section of the heat exchanger. And cooling at the outlet of the mixed-medium turbine to reduce the pressure at the outlet of the mixed-medium turbine.

[0032] In the invention of claim 8, in the near-urban nuclear power plant according to claim 1, the heat released by the condensate recovery in the mixed medium power generation system is recovered by the high concentration mixed medium liquid for producing the concentration difference energy. A near-city nuclear power plant is provided.

According to a ninth aspect of the present invention, in the near-city nuclear power plant according to the eighth aspect, a heat exchanger for cooling steam discharged from the mixed medium turbine of the mixed medium power generation system is provided, and the heat of the steam is concentrated. A near-urban nuclear power plant characterized by being recovered with a medium-concentration mixed medium liquid for producing a difference energy.

According to a tenth aspect of the present invention, in the near-city nuclear power plant according to the ninth aspect, a pressure reducing valve is provided between an outlet side of the low-concentration mixed medium liquid separated by the high-pressure separator of the mixed medium power generation system and the heat exchanger. And an intermediate-pressure separator, wherein the high-concentration mixed-media vapor separated by the intermediate-pressure separator is guided to the middle stage of the mixed-medium turbine.

In the eleventh aspect of the present invention, in the near-city nuclear power plant according to the tenth aspect, the high-concentration mixed-medium vapor separated by the medium-pressure separator of the mixed-medium power generation system is guided to a newly installed heat exchanger and condensed. The medium-concentration mixed medium liquid that has undergone heat exchange in the heat exchanger is conducted to this heat exchanger to perform heat exchange, and the mixed medium pressurized by the pressure pump is also conducted for heat exchange,
The newly-developed expansion valve causes adiabatic expansion and heat exchange of the steam discharged from the mixed-medium turbine by a heat exchanger for cooling, and the heat is led to an ejector-type mixer. A near-urban nuclear power plant characterized in that a medium-concentration mixed medium liquid subjected to heat exchange is guided to a medium-pressure separator of a concentration difference energy production system.

According to a twelfth aspect of the present invention, in the near-city nuclear power plant according to the first aspect, a circulating pump and a heat exchanger are provided between the reactor system and the mixed medium power generation system instead of the concentration difference energy production system. An intermediate heat circuit is provided, and the mixed medium that has exchanged heat in the heat exchanger of the intermediate heat circuit is guided to the high-pressure separator, and the high-concentration mixed-media vapor separated by the high-pressure separator is branched and returned to the mixed-medium turbine. The high-concentration mixed medium liquid returned to the liquid container is conveyed to the high-concentration mixed medium liquid storage tank for a long distance, and the low-concentration mixed medium liquid separated by the high-pressure separator is subjected to heat exchange, and the low-concentration mixed medium liquid is exchanged. The medium-concentration mixed-medium liquid transported to the medium-concentration mixed-medium liquid storage tank is branched into one that is transported to the storage tank for a long distance and one that is guided to the throttle valve, and is guided to the inlet side of the pressure pump. The capital characterized by To provide a near-nuclear power plant.

According to a thirteenth aspect of the present invention, in the near-city nuclear power plant according to the twelfth aspect, the ejected steam from the mixed-medium turbine of the mixed-medium power generation system is mixed with the low-concentration mixed-medium liquid separated by the high-pressure separator. Near the city characterized by a structure in which the liquid is absorbed by a condenser, cooled by a condenser using medium-concentration mixed medium liquid transported from a medium-concentration mixed medium liquid storage tank, and guided to the inlet side of a pressure pump. Provide a nuclear plant.

According to a fourteenth aspect of the present invention, in the near-city nuclear power plant according to the thirteenth aspect, instead of branching the high-concentration mixed medium vapor separated by the high-pressure separator of the mixed-medium power generation system and leading it to a condenser, In this configuration, the exhaust gas of the mixed-medium turbine was guided to the condenser, the condensed liquid of the high-concentration mixed medium was transported to the high-concentration mixed-medium storage tank, and the low-concentration mixed medium liquid separated by the high-pressure separator was subjected to heat exchange. Provided is a near-urban nuclear power plant characterized in that objects are transported to a low concentration mixed medium storage tank over a long distance without branching.

According to a fifteenth aspect of the present invention, in the near-city nuclear power plant according to the fourteenth aspect, an ejector-type mixer and a high-concentration mixed medium of a high-pressure separator are provided between the mixed-medium turbine of the mixed-medium power generation system and the condenser. A condenser and throttle valve are installed between the steam branch pipe and the ejector-type mixer, and the newly installed condenser is cooled with a mixed medium pressurized by a pressure pump, and heat exchange in the intermediate heat circuit is performed. Provided is an urban proximity nuclear power plant characterized by having a configuration leading to a vessel.

According to a sixteenth aspect of the present invention, in the near-city nuclear power plant according to the twelfth aspect, a pressure reducing valve and a medium pressure separator are provided between the heat exchanger and the outlet of the low concentration mixed medium liquid of the high pressure separator of the mixed medium power generation system. A high-concentration mixed medium vapor separated by a medium-pressure separator into an intermediate stage of a mixed-medium turbine.

According to a seventeenth aspect of the present invention, in the near-city nuclear power plant according to the thirteenth aspect, the pressure reducing valve and the medium pressure between the heat exchanger on the outlet side of the low-concentration mixed medium liquid of the high-pressure separator of the mixed medium power generation system. Provided is a close-to-city nuclear power plant, wherein a separator is inserted and a high-concentration mixed medium vapor separated by a medium-pressure separator is guided to a middle stage of a mixed medium turbine.

According to the eighteenth aspect of the present invention, in the near-city nuclear power plant according to the seventeenth aspect, a high-concentration mixed medium vapor separated by the high-pressure separator of the mixed-medium power generation system is replaced with a condensate for branching and condensing. A condensate for condensing the high-concentration mixed medium vapor separated by the medium-pressure separator is provided, and the mixed medium liquid condensed by the condensate is guided to a high-concentration mixed medium liquid storage tank. To provide a nuclear power plant near the city.

According to a nineteenth aspect of the present invention, in the near-city nuclear power plant according to the seventeenth aspect, a high-concentration mixed medium vapor separated by the high-pressure separator of the mixed-medium power generation system is branched and condensed instead of a condensate. Provided is an urban proximity nuclear power plant provided with a condenser for condensing mixed medium turbine exhaust gas.

According to a twentieth aspect of the present invention, in the near-city nuclear power plant according to the nineteenth aspect, an ejector-type mixer is provided between the mixed-medium turbine of the mixed-medium power generation system and the condenser, and the high-pressure separator is provided. A condenser and a throttle valve are installed between the high-concentration mixed medium vapor branch pipe and the ejector-type mixer, and the newly installed condenser is cooled with a mixed medium pressurized by a pressure pump. A near-city nuclear power plant characterized in that a mixed medium is led to a heat exchanger of an intermediate heat circuit.

According to a twenty-first aspect of the present invention, in the close-to-urban nuclear power plant according to the twentieth aspect, the high-concentration mixed-medium vapor of the medium-pressure separator of the mixed-medium power generation system is returned to the middle stage of the mixed-medium turbine, Provided is a close-to-city nuclear power plant characterized by being connected to a reactor.

According to the twenty-second aspect, the first to twenty-first aspects are described.
In the close-to-urban nuclear power plant described in any one of the above, the core, heat exchanger and circulation pump are integrated with the integrated natural circulation BWR reactor system, and the boron water pool and the circulation path are connected via upper and lower density locks. Is provided in a boron water pool, and a PWR reactor system of a type operated under pressure is provided.

According to the twenty-third aspect, the first to twenty-first aspects are described.
In the near-city nuclear power plant according to any one of the above, the core, the heat exchanger and the fluid valve are integrated with each other instead of the integrated natural circulation BWR reactor system, and the boron water pool and the circulation path are connected via upper and lower density locks. Is provided in a boron water pool, and a BWR reactor system of a type operated by boiling with reactor water is provided.

According to the twenty-fourth aspect, the first to twenty-first aspects are described.
In the close-to-city nuclear power plant described in any one of the above, the core, steam inlet piping / inlet structure, steam outlet piping / outlet structure are integrated with the integrated natural circulation BWR reactor system, Provide a near-city nuclear power plant characterized by applying a steam-cooled reactor system that is installed in the boron water pool so as to form a circulation path with the boron water pool and cools the core with steam to operate I do.

According to the twenty-fifth aspect, the first to twenty-first aspects are described.
In the near-city nuclear power plant described in any one of the above, instead of the integrated natural circulation BWR reactor system, the particle fuel core, the primary pump, the primary circulation structure, and the heat exchanger are integrated, and the primary fluid A near-city nuclear power plant is provided, in which a fluidized-bed reactor system configured to perform heat recovery by simultaneously cooling a core while floating fuel to constitute a core is provided.

Incidentally, in the close-to-city nuclear power plant according to the present invention, particularly preferred configurations are the following (1) to (2).
It is as 5).

(1) A fuel core is installed in a reactor pressure vessel to form a reactor core, and control rods are inserted by a control rod drive mechanism installed above the reactor pressure vessel. An integrated natural circulation BWR reactor system that is installed at the top of the reactor pressure vessel and removes heat generated in the core by natural circulation, and a mixed-medium turbine with high-concentration mixed-medium steam separated by a high-pressure separator Drives to generate power, and the steam discharged from the mixed-medium turbine is absorbed by a low-concentration mixed-medium liquid separated by a high-pressure separator by an ejector-type mixer, and cooled by a condensate using seawater, air, and river water. Then, the liquid is condensed and sent to the heat exchanger on the outlet side of the low-concentration mixed medium liquid separated by the high-pressure separator by the pressure pump for heat exchange, and then to the heat exchanger of the reactor system for heat exchange. And circulate it through the high-pressure separator. The mixed medium pressurized in the step is branched, and the high-concentration mixed medium vapor separated by the medium pressure separator of the concentration difference energy production system is condensed by the condensate, and the heat exchanger cools the low-concentration mixed medium liquid. And a mixed-medium power generation system that conducts heat exchange to conduct heat to the heat exchanger of the nuclear reactor system.
In addition, the medium-concentration mixed medium conveyed from the heat supply center is heat-exchanged and heated by the heat exchanger on the outlet side of the low-concentration mixed-medium liquid of the high-pressure separator of the mixed-medium power generation system. Separation into concentrated mixed medium vapor and low concentrated mixed medium liquid,
The high-concentration mixed-medium vapor exchanges heat with a branch of the medium-concentration mixed medium pressurized by the pressurized pump of the mixed-medium power generation system, and condenses. The concentration of the low-concentration mixed medium liquid separated by the separator, which is exchanged with the branched medium-concentration mixed medium pressurized by the pressurized pump of the mixed-medium power generation system and transferred to the heat supply center by exchanging heat with the heat exchanger. A differential energy production system is provided. further,
The adiabatic expansion of the high-concentration mixed medium liquid transported over a long distance produces cooling, and heat exchange is performed by the supercooling device of the ice production system. And a refrigerant generation system at a heat supply center that mixes and absorbs the water, cools it with air, sewerage, central water or river water, reconstitutes it, and transports it as a medium-concentration mixed medium liquid to a concentration difference energy production system over a long distance. An ice production system for supercooling water with a refrigerant generated by the system to produce and store ice, turning ice stored in an ice storage tank into an ice slurry, and circulating the ice slurry to a cooling demand facility; The system exchanges heat with that mixed and absorbed by the ejector type mixer to generate hot water and circulate it with the heating demand facility.

(2) A water / ammonia mixed medium is used as the mixed medium used in the mixed medium power generation system and the concentration difference energy production system of (1).

(3) The high-, medium-, and low-concentration mixed-medium piping installed between the mixed-medium power generation system, the concentration difference energy production system, and the heat supply center of (1) has a storage function.

(4) The high-, medium-, and low-concentration mixed medium pipe of (3) is a deep underground pipe.

(5) Deep seawater is used as the seawater for cooling the condenser of the mixed-medium power generation system of (1).

(6) The high-concentration mixed-medium vapor pipe of the high-pressure separator of the mixed-medium power generation system of (1) is branched and connected to a new condenser, and an expansion valve is connected to the condenser. Connect to the heat exchange section of the newly installed heat exchanger at the outlet of the mixed medium turbine, connect the other end of the heat exchange section to the connection pipe of the throttle valve and the ejector type mixer, and store in the medium-concentration mixed medium storage tank The mixed medium is connected to the heat exchanger of the seawater cooling condenser, and the other end is branched to the heat exchanger of the newly installed condenser and the heat exchanger of the heat exchanger at the low concentration mixed medium outlet of the high pressure separator. Then, a configuration is added in which the other ends of the two heat exchange sections are connected to the medium pressure separator of the concentration difference energy production system.

(7) A heat exchanger is installed at the outlet of the mixed-medium turbine of the mixed-medium power generation system of (1), and the high-concentration mixing stored in the high-concentration mixed-medium liquid storage tank in the heat exchange section of the heat exchanger. A medium obtained by adiabatically expanding the medium with an expansion valve is flowed and cooled, and the high-concentration mixed medium vapor that has undergone heat exchange is guided to an ejector-type mixer. It is guided to an ejector type mixer via a throttle valve, mixed and absorbed with high-concentration mixed medium vapor, guided to a condensate, cooled with seawater and condensed, and this condensate is stored in a medium-concentrated mixed medium liquid storage tank. An expansion valve, ejector-type mixer, throttle valve, and condensate are additionally installed.

(8) The steam discharged from the mixed-medium turbine of the mixed-medium power generation system of (1) is absorbed by a low-concentration mixed-medium liquid separated by a high-pressure separator by an ejector-type mixer, and seawater is collected by a condenser. In addition to cooling using air and river water, the medium-concentration mixed-medium liquid conveyed to the concentration-difference energy production system from a medium-concentration mixed-medium storage tank is guided to the heat exchange section of the condenser. After cooling, the medium-concentration mixed medium is guided to a heat exchanger for cooling the low-concentration mixed medium liquid separated by the high-pressure separator to perform heat exchange, and is guided to the medium-pressure separator for the concentration difference energy production system. .

(9) A heat exchanger for cooling the steam discharged from the mixed-medium turbine of the mixed-medium power generation system of (8) is provided. The medium-concentration mixed-medium liquid conveyed over a long distance from the liquid storage tank is branched and cooled, guided to a medium-pressure separator for the concentration difference energy production system, and the mixed medium pressurized by a pressure pump is branched. Also, a configuration is added in which the heat is exchanged with the heat exchanger and the heat is exchanged with the heat exchanger of the nuclear reactor system.

(10) A pressure reducing valve and a medium pressure separator are inserted between the heat exchanger and the outlet of the low concentration mixed medium separated by the high pressure separator of the mixed medium power generation system of (9). The high concentration mixed medium vapor separated by the pressure separator is guided to the middle stage of the mixed medium turbine.

(11) The high-concentration mixed-medium vapor separated by the medium-pressure separator of the mixed-medium power generation system of (10) is led to a newly installed heat exchanger, and the medium-concentration mixed is heat-exchanged by a condenser. The medium liquid was led to this heat exchanger for heat exchange, and the mixed medium pressurized by the pressure pump was also led for heat exchange, and the mixed medium turbine was discharged by adiabatic expansion with the newly installed expansion valve. Heat exchange is performed by the heat exchanger for cooling the steam, guided to the ejector-type mixer, and the medium-concentration mixed-medium liquid that has been heat-exchanged with the high-concentration mixed-medium vapor separated by the medium-pressure separator is a concentration difference energy production system. To a medium pressure separator.

(12) The reactor system of (1),
An intermediate heat circuit composed of a circulation pump and a heat exchanger is provided between the mixed medium power generation system, and the mixed medium that has exchanged heat in the heat exchanger of the intermediate heat circuit is led to the high-pressure separator, and The separated high-concentration mixed medium vapor is branched and guided to the mixed-medium turbine and the condenser, and the condensed high-concentration mixed medium liquid is transported to the high-concentration mixed medium liquid storage tank for a long distance and separated by the high-pressure separator. The low-concentration mixed-medium liquid is heat-exchanged, branched into a long-conveyance medium-concentration-mixed-medium liquid storage tank and a medium-conveyed medium-concentration mixed medium-liquid storage tank. The concentration mixed medium liquid is guided to the inlet side of the pressure pump, and the concentration difference energy production system is eliminated.

(13) The steam discharged from the mixed-medium turbine of the mixed-medium power generation system of (12) is absorbed by a low-concentration mixed-medium liquid separated by a high-pressure separator by an ejector-type mixer, and then condensed by seawater. In addition to cooling using air and river water, cooling using medium-concentration mixed-medium liquid conveyed over a long distance from the medium-concentration mixed-medium liquid storage tank is conducted to the inlet side of the pressure pump. And

(14) The high-concentration mixed-medium vapor separated by the high-pressure separator of the mixed-medium power generation system of (13) is not branched and guided to the condenser, and the mixed-medium turbine exhaust vapor is condensed. The condensate of the high-concentration mixed medium is transported to the high-concentration mixed-medium storage tank over a long distance, and the low-concentration mixed medium separated by the high-pressure separator is subjected to heat exchange without branching. Transfer the mixture to the mixed medium storage tank over a long distance, and remove the throttle valve, mixer, and condenser.

(15) An ejector-type mixer between the mixed-medium turbine and the condenser in the mixed-medium power generation system of (14), a branch pipe of high-concentration mixed-medium vapor of a high-pressure separator, and an ejector-type mixer. A condenser and a throttle valve are installed between them, and the newly installed condenser is cooled with a mixed medium pressurized by a pressure pump, and is guided to a heat exchanger of an intermediate heat circuit.

(16) A pressure reducing valve and a medium pressure separator are inserted between the heat exchanger and the outlet of the low-concentration mixed medium liquid of the high pressure separator of the mixed medium power generation system of (12). The separated high-concentration mixed medium vapor is guided to the middle stage of the mixed medium turbine.

(17) A pressure reducing valve and a medium pressure separator are inserted between the heat exchanger on the outlet side of the low concentration mixed medium liquid of the high pressure separator of the mixed medium power generation system of the above (13), The high-concentration mixed-medium vapor separated in the step is guided to the middle stage of the mixed-medium turbine.

(18) The high-concentration mixed medium vapor separated by the high-pressure separator in the mixed-medium power generation system of (17) is separated from the high-concentration mixed medium vapor, and the high-concentration mixed medium separated by the medium-pressure separator is stopped. The mixed medium vapor is changed to be condensed, and the condensed mixed medium liquid is guided to the high concentration mixed medium liquid storage tank.

(19) The condenser for branching and condensing the high-concentration mixed-medium vapor separated by the high-pressure separator of the mixed-medium power generation system of (17) is changed so as to condensate the mixed-medium turbine exhaust. Remove the throttle, mixer, and condensate.

(20) An ejector-type mixer between the mixed-medium turbine and the condenser in the mixed-medium power generation system of (19), a branch pipe for high-concentration mixed-medium vapor in a high-pressure separator, and an ejector-type mixer A condenser and a throttle valve are installed between them, and the newly installed condenser is cooled with a mixed medium pressurized by a pressure pump, and is guided to a heat exchanger of an intermediate heat circuit.

(21) The high-concentration mixed medium vapor of the high-pressure separator of the mixed-medium power generation system of (20) is branched and connected to a condenser, and the high-concentration mixed medium vapor of the medium-pressure separator is mixed with the mixed medium turbine. Stop guiding to the middle stage and change the connection to the condenser.

(22) Instead of the reactor system of the above (1) to (21), a reactor core, a heat exchanger and a circulation pump are integrated, and a circulation path is formed with a boron water pool through upper and lower density locks. PIUS which is installed in a boron water pool in such a manner, operates under pressure, and in the event of an accident, removes heat by forming a natural circulation path with the boron water pool via upper and lower density locks
Type PWR reactor system.

(23) Instead of the reactor system of (1) to (21), a reactor core, a heat exchanger and a fluid valve are integrated,
It is installed in the boron water pool so as to form a circulation path with the boron water pool via the upper and lower density locks, and is operated by boiling with reactor water. A PIUS-type BWR reactor system that removes heat by forming a pool and a natural circulation path.

(24) Instead of the reactor system of (1) to (21), a reactor core, a steam inlet pipe / inlet structure, and a steam outlet pipe / outlet structure are integrated, and a boron water pool is connected via a vertical density lock. It is installed in a boron water pool so as to form a circulation path and cools the core with steam to operate.In the event of an accident, a natural circulation path is formed with the boron water pool through the upper and lower density locks to remove heat. Steam-cooled reactor system.

(25) Instead of the reactor system of (1) to (21), the particle fuel core, the primary pump, the primary circulation system, and the heat exchanger are integrated, and the particle fuel is levitated by the primary fluid. At the same time, the core is cooled and the core is cooled and heat recovery is performed.In the event of an accident, the primary system pump stops, the floating fuel falls, and the nuclear chain reaction stops, so that a fluidized bed reactor is configured. System.

[0076]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of a near-city nuclear power plant according to the present invention will be described with reference to the drawings.

First Embodiment (FIGS. 1 and 2)
5) In this embodiment, the mixed medium of the mixed-medium power generation system is separated by heat generated in the integrated natural circulation BWR reactor system, and the mixed-medium turbine is driven by high-concentration mixed-medium steam to generate electric power. Using the low-concentration mixed medium liquid of the high-pressure separator of the medium power generation system as a heating source, a high-concentration and low-concentration mixed medium liquid is produced by the concentration difference energy production system and transported to the heat supply center for a long distance, and the refrigerant at the heat supply center A refrigerant is produced in the production system, ice is produced and stored in the ice production system using the refrigerant, and the ice slurry is transported to a cooling and heating demand facility for cooling, and high and low concentrations are produced in the refrigerant production system. Hot water is produced by the heat generated when mixing and absorbing the mixed medium of the above, transported to a cooling and heating facility for heating, and the high-concentration and low-concentration mixed medium is supplied to the concentration difference energy production system and the heat supply center. Done through deep underground tunnels piping for transporting the relates cities near a nuclear power plant corresponding to the load fluctuation to have a storage function of the mixed medium in the pipe.

FIGS. 1 and 2 show the configuration of a near-city nuclear power plant according to this embodiment. FIG. 1 shows the configuration of an integrated natural circulation BWR reactor system, a mixed medium power generation system and a concentration difference energy production system. FIG. FIG. 2 is a system diagram showing a configuration and a flow of a deep underground transportation supply center and a cooling and heating demand facility.

As shown in FIG. 1, the integrated natural circulation BWR
The reactor system includes a reactor pressure vessel 1a, a core support plate 4, a fuel assembly 3 constituting a core, a control rod guide tube 2, a heat exchanger 5, a control rod driving device 6, and the like.

That is, the fuel assembly 3 is placed in the reactor pressure vessel 1a.
Are installed to form a reactor core, and the control rod 6a is inserted by the control rod drive mechanism 6 installed above the reactor pressure vessel 1a. The heat exchanger 15 is installed in the upper part of the reactor pressure vessel 1a, and is configured to remove heat generated in the reactor core by natural circulation of the light water 1b.

As shown by the arrows in FIG. 1, the light water 1b heated by the fuel assembly 3 boils and rises between the control rod guide tubes 2 to be separated into steam and hot water. 5 and exchanges heat with the mixed medium as the secondary heat exchange medium. Due to this heat exchange, the light water 1b is condensed and cooled, its density increases and descends, passes through the openings 110a and 109a of the partition wall 110 and the shroud support 109, and passes through the opening of the core support plate 4 to the fuel assembly 3 Circulates into the tank.

Although not shown, a water storage tank is provided above the integrated natural circulation BWR reactor system 104.
By connecting the pipe of the decay heat removal system using natural circulation for performing heat exchange with water in the water storage tank to the heat exchanger 5, even if the heat removal system by forced convection of the heat exchanger 5 stops operating, Decay heat generated in the core can be removed.

The mixed-medium power generation system 7 includes a high-pressure separator 9, a mixed-medium turbine 10, a generator 11, and a heat exchanger 1.
5, a throttle valve 16, a mixer 12, a liquid condenser 13, a pressure pump 14, and the like.

Then, the mixed medium pressurized by the pressurizing pump 14 branches and flows into the heat exchanger 15 on the outlet side of the low-concentration mixed medium of the high-pressure separator 9, where it is heated by heat exchange and subsequently heated. After flowing into the heat exchanger 5 of the integrated natural circulation BWR reactor system 104 and heated by the heat exchange with the light water 1b, it flows again into the high-pressure separator 9 where the high-concentration mixed medium vapor and the low-concentration mixed medium liquid And separated. The high-concentration mixed-medium vapor flows into and drives the mixed-medium turbine 10 and generates electric power by a coaxially coupled generator 11.

The low-concentration mixed medium liquid separated by the high-pressure separator 9 flows into the heat exchanger 15 and exchanges heat with the medium-concentration mixed medium liquid passing through the following concentration difference energy production system 8, and is throttled. After flowing into the valve 16, it is adiabatically expanded and then guided to the ejector-type mixer 12. In the mixing ejector type mixer 12, the exhaust gas of the mixing medium turbine 10 is sucked,
After being mixed and absorbed by the low concentration mixed medium liquid, it flows into the liquid condenser 13. In the liquid condensing device 13, the mixed medium that has flowed in is cooled by, for example, deep cold seawater 103 (which may be river water or the atmosphere) to be condensed, and the condensed liquid is guided to the inlet side of the pressure pump 14.

On the other hand, the mixed medium liquid branched by the pressure pump 14 is supplied to the intermediate pressure separator 1 of the concentration difference energy producing system 8.
Condenser 1 for high concentration mixed medium vapor and low concentration mixed medium liquid 7
After flowing into the heat exchanger 8 and the heat exchanger 111 and heated by heat exchange, it flows into the heat exchanger 5 of the integrated natural circulation BWR reactor system 104.

The concentration difference energy producing system 8 is composed of a medium pressure separator 17, a liquid condenser 18, a pump 19, a heat exchanger 111 and the like.

That is, the medium-concentration mixed medium liquid conveyed from the heat supply center 107 described later is pressurized by the pressurizing pump 19, and the heat of the low-concentration mixed medium liquid outlet side of the high-pressure separator 9 of the mixed medium power generation system 7 is It flows into the exchanger 15 and is heated by heat exchange, and flows into the intermediate-pressure separator 17.

In the medium-pressure separator 17, the medium-concentration mixed medium liquid is separated into a high-concentration mixed-medium vapor and a low-concentration mixed-medium liquid,
The high-concentration mixed-medium vapor separated by the medium-pressure separator 17 flows into the condenser 18 and is cooled by the mixed-medium liquid conveyed by the pressurizing pump 14 of the mixed-medium power generation system 7 to be condensed. It is transported to the supply center 107.

The low-concentration mixed medium liquid separated by the intermediate-pressure separator 17 is guided to the heat exchanger 111 and exchanges heat with the mixed medium liquid conveyed by the pressurizing pump 14 of the mixed-medium power generation system 7. It is transported to a heat supply center 107 described later.

Next, the deep underground transportation system 118, the heat supply center 107, and the cooling / heating demand facility 22 will be described with reference to FIG.

The deep underground transportation system 118 is configured by arranging a storage tank, a transportation pump, a transportation pipe and the like in an underground tunnel (not shown). That is, in the underground tunnel, the high concentration mixed medium liquid storage tank 112 and the low concentration mixed medium storage tank 1
13, medium-concentration mixed-medium storage tank 114, high-concentration mixed-medium conveying pump 115, low-concentration mixed-medium conveying pump 116, medium-concentration mixed-medium conveying pump 117, and the like, are installed underground at a large depth. Note that the transfer pipe 118a also forms a part of the storage tank.

The heat supply center 107 includes the refrigerant production system 20, the ice production system 21, the cooling tower 10
6. The refrigerant production system 20 is configured by the pump 105 and the like, and the expansion system 23 is configured by the expansion valve 23, the throttle valve 24, the ejector type mixer 25, the liquid condenser 26, and the transport pump 27.

Condenser 1 of concentration difference energy production system 8
The high-concentration mixed medium liquid conveyed from the cooling medium 8 is adiabatically expanded by the expansion valve 32 of the refrigerant manufacturing system 8 to become a refrigerant, and performs heat exchange in the supercooling device 28 of the ice manufacturing system 21 to be guided to the ejector-type mixer 25. I will

The low-concentration mixed medium liquid conveyed from the heat exchanger 111 of the concentration difference energy production system 8 is adiabatically expanded by the throttle valve 24 and guided to the ejector-type mixer 25 to mix and absorb the high-concentration mixed medium vapor. Then, it is led to the condenser 26, where the cooling tower 106 (or the tap water,
Heat is exchanged with cooling water from river water and sewage) to return the liquid, and the liquid is conveyed to the inlet of the pressure pump 19 of the concentration difference energy producing system 8 by the circulation pump 27.

The ice production system 21 includes a subcooling device 28,
It is composed of an ice storage tank 29, a circulation pump 30, an ice slurry transport pump 31, and the like. The supercooling device 28 performs heat exchange with the high-concentration mixed medium refrigerant generated by adiabatic expansion at the expansion valve 23 of the refrigerant production system 20 to produce supercooled water, stores the supercooled water in the ice storage tank 29, The ice slurry is circulated from the storage tank 29 to the cooling and heating demand facility 22 by the pump 31, and the water from which the ice has been removed from the ice storage tank 29 is supplied to the supercooling device 28 by the circulation pump 30 to produce ice.

Next, the operation of the present embodiment will be described.

In the reactor, the coolant made of light water is heated in the fuel assembly 3 to become saturated steam, and is sent to the heat exchanger 5. The water vapor sent to the heat exchanger 5 exchanges heat with the mixed medium liquid sent from the mixed medium power generation system 7 to become condensed water, descends due to the density difference, and is returned to the inlet side of the fuel assembly 3.

Therefore, in the daytime when power demand is high,
The mixed-medium power generation system 7 drives the mixed-medium turbine 7 with the high-concentration mixed-medium vapor separated by the high-pressure separator to generate power, and the outlet-side heat exchanger of the low-concentration mixed-medium liquid separated by the high-pressure separator 9. At 15, heat exchange with the medium-concentration mixed medium conveyed from the heat supply center is not performed (the concentration difference energy production system 8 is not operated), and heat exchange with the high-concentration mixed medium liquid condensed by the liquid condensing unit 13 is performed. Do. Pressurizing pump 1
Neither does the mixed medium pressurized in 4 branch and is conveyed to the concentration difference energy production system 8. The ice stored in the ice storage tank 29 of the ice manufacturing system 21 is converted into a water slurry and transported by the transport pump 31 to the cooling device of the cooling and heating demand facility 22 for air conditioning. In addition, a refrigerant is generated by using the high-concentration mixed medium liquid stored in the storage tank 112, and the production of ice in the supercooling device 28 is performed in the daytime other than the peak power demand time zone. The high-concentration mixed-medium vapor used to generate the refrigerant is mixed and absorbed by the low-concentration mixed medium stored in the storage tank 113, reconstituted using the cooling water of the cooling tower 106, and is stored in the medium-concentrated mixed medium storage tank 114. Store in.

At night when power demand is small,
The medium-concentration mixed-medium liquid stored in the medium-concentration mixed-medium liquid storage tank 114 is conveyed to cool the heat exchanger 15 on the outlet side of the low-concentration mixed-medium liquid separated by the high-pressure separator 9 of the mixed-medium power generation system 7. Guided to the heat exchange section by the pump 117 and the pressurized pump 19, the heated medium-concentration mixed medium liquid is guided to the medium-pressure separator of the concentration difference energy production system 8, and separated into high-concentration mixed medium vapor and low-concentration mixed medium liquid. I do. The high-concentration mixed-medium vapor is guided to the condenser 18, cooled by the mixed medium pressurized by the pressurizing pump 14, returned, and stored in the high-concentration mixed-medium storage tank 112. The mixture is guided to the heat exchanger 111, cooled by the mixed medium pressurized by the pressurizing pump 14, and stored in the low concentration mixed medium storage tank 112. Condenser 1
8. The mixed medium heated by performing heat exchange in the heat exchanger 111 is guided to the heat exchanger 5 of the integrated natural circulation BWR reactor system 104, heated, and guided to the high-pressure separator for high concentration mixing. It is separated into medium vapor and low concentration mixed medium liquid.

The high-concentration mixed medium steam is supplied to the mixed medium turbine 1
The generator 1 which is guided to 0 and drives it to be coaxially coupled
1 generates electric power, and the exhaust gas of the mixed medium turbine 10 is guided to an ejector type mixer 12. The measurement concentration mixed medium liquid separated by the high pressure separator is cooled by performing heat exchange with the medium concentration mixed medium liquid which is guided to the heat exchanger 15 and conveyed by the pressure pump 19, and undergoes adiabatic expansion by the throttle valve 16. Then, the mixture is guided to the ejector type mixer 12, mixes and absorbs the high-concentration mixed medium vapor of the exhaust gas of the mixed medium turbine 10, is guided to the condenser 13, is cooled in the heat exchange section where the seawater flows, and condenses, Pressurizing pump 14
It is led to.

The expansion valve 23 of the refrigerant generation system 20 is supplied from the high-concentration mixed medium liquid storage tank 112 using the transfer pump 115.
A high-concentration mixed-medium liquid is introduced to the cooling medium, and a low-temperature mixed-medium refrigerant is generated by adiabatic expansion. This mixed-medium refrigerant is transported to the supercooling device 28 of the ice production system 21 to perform heat exchange, and water is supercooled. In this state, the mixed medium liquid is heated to be a vapor, and is guided to the ejector type absorber 25. In the ejector-type absorber 25, the low-concentration mixed medium liquid in the low-concentration mixed medium liquid storage tank 113 is conveyed by the conveying pump 116, mixed and absorbed with the one adiabatically expanded by the throttle valve 24, and guided to the condenser 26. .

In the liquid condensing device 26, the mixed medium is cooled by the cooling water cooled in the cooling tower 105 to be condensed. The reconstituted liquid is conveyed to the medium concentration mixed medium storage tank 114 by the conveyance pump 27 and stored. Ice production system 2
The water guided by the circulation pump 30 to the first supercooling device 28 is:
A supercooled state is formed by the mixed medium refrigerant generated by the adiabatic expansion by the expansion valve 23, the supercooling is released in the ice storage tank 29, and ice is generated and stored.

In the above description, the heat exchanger 1 on the low concentration mixed medium side of the high pressure separator 9 of the mixed medium power generation system 7 is described.
Although the medium-concentration mixed-medium storage tank 114 is guided to the heat-exchange section 5 for the heat exchange, heat exchange is performed. The reduced amount is used for the medium concentration mixed medium storage tank 114.
May be used for heating the medium-concentration mixed medium and stored as a concentration difference energy.

According to the above-described first embodiment, the following effects can be obtained.

The mixed-medium power generation system 7 is used to recover heat energy from the integrated natural circulation BWR reactor system 1, and the low-concentration mixed-medium heat of the high-pressure separator 9 of the mixed-medium power generation system 7 is recovered to obtain a concentration difference energy. By generating a high-concentration and low-concentration mixed medium liquid over a long distance, generating a refrigerant and supplying it to cooling demand, high power generation with high electric conversion efficiency can be performed, and by adopting a double circuit The safety of the nuclear power plant will be further enhanced, and it will be possible to build it closer to the demand area. Therefore, the loss in the heat supply can be reduced, the heat loss in the heat transfer for transferring in the form of the density difference energy can be reduced, and the storage can be easily performed, so that the load leveling can be easily performed.

A mixed medium liquid having a high concentration and a low concentration is produced and stored, and a refrigerant generation system and an ice production system are added to produce ice using heat energy and electric energy of night-time nuclear energy. Ice is stored and slurried during daytime when power demand is high, transported to a target facility for cooling, such as an office building, and cooled, so that the load can be leveled by cooling in response to peak power demand during the day. Can be provided.

Since a nuclear power plant has a low operating cost compared to other power generation methods, it is advantageous to operate at a rated output for energy saving. By responding to what has been done with nuclear energy, it is possible to provide a power generation method that does not emit carbon dioxide, and contribute to the prevention of global warming.

Since the energy of the concentration difference is produced and stored, it is possible to meet the demand for cooling or the like by using the energy, so that it is not necessary to control the output of the nuclear power plant with respect to the load fluctuation.
The need for an electric control rod drive system is eliminated, so that the construction cost of the nuclear power plant can be reduced and the operation can be performed easily.

By making the nuclear power plant capable of supplying heat energy and electric energy, the overall thermal efficiency can be increased as compared with the case of only power generation, so that the power generation efficiency may be somewhat sacrificed, and Since the pressure can be reduced, the safety of the nuclear power plant can be improved and the construction cost can be reduced. Also,
Because large-scale reactor pressure vessels can be manufactured, large-capacity nuclear power plants can be constructed.

A high-concentration and low-concentration mixed medium liquid is sent to a heat demanding area by a tunnel constructed underground at a large depth, so that a straight transportation route can be secured, the length of the piping can be reduced, and the piping at the time of transportation can be reduced. Pressure loss can also be reduced. By using the transport pipe as a part of the storage tank, the necessity of separately preparing a storage tank for coping with load fluctuation can be reduced.

Second Embodiment (FIG. 3) (corresponding to claim 6) In this embodiment, the mixed medium steam pipe of the high pressure separator of the mixed medium power generation system of the first embodiment is branched to form a newly installed condenser. Connect the expansion valve to this condenser, and connect it to the heat exchanger of the newly installed heat exchanger at the outlet of the mixed medium turbine,
The other end of the heat exchange section is connected in the middle of the connection pipe between the throttle valve and the ejector type mixer, while the medium concentration mixed medium liquid stored in the medium concentration medium storage tank is connected to the heat exchange section of the seawater cooling condensate The other end is branched and connected to the heat exchange section of the newly installed condenser and the heat exchange section of the heat exchanger at the outlet of the low-concentration mixed medium of the high-pressure separator, and the other ends of both heat exchange sections are concentrated. It is configured to be joined to a medium pressure separator of a difference energy production system.

FIG. 3 is a system diagram showing the configuration and flow of such a nuclear power plant located close to an urban area, and mainly describes a mixed-medium power generation plant. The deep underground transport system 118, the heat supply center 107, and the like shown in the first embodiment will be described with reference to FIG.

As shown in FIG. 3, in the plant of this embodiment, the mixed-medium power generation system 7a is modified from the mixed-medium power generation system 7 of the first embodiment. That is, the mixed medium power generation system 7a branches the mixed medium steam pipe 136 of the high pressure separator 9 and
a is connected to a newly installed condenser 137, an expansion valve 138 is connected to the condenser 137, and the mixed medium turbine 1
It is connected to the heat exchange part of the newly installed heat exchanger 34 at the outlet of the zero. The other end of the heat exchange section of the heat exchanger 34 is connected to the middle of a connection pipe 16 a between the throttle valve 16 and the ejector type mixer 12.

On the other hand, the medium-concentration mixed medium liquid stored in the medium-concentration mixed medium storage tank 114 shown in FIG. 2 is supplied to the heat exchange section of the seawater cooling and condensing unit 13 by the pressure pump 19 and the pipe 19a. The downstream side of the heat exchange part of the pipe 19a is branched and connected to the heat exchange part of the newly installed condenser 137 and the heat exchange part of the heat exchanger 15 at the outlet of the low concentration mixed medium of the high pressure separator 9, respectively. The outlet end sides of these heat exchange sections are integrated to form the intermediate pressure separator 17 of the concentration difference energy production system 8.
It is configured to be joined.

[0116] The other structure is the same as that of the first embodiment, so that the same reference numerals as in Fig. 1 are used in Fig. 3 and the description is omitted. This point is the same in each of the following embodiments.

The operation of the present embodiment is substantially the same as that of the first embodiment, except for the following points.

That is, the mixed medium vapor of the high-pressure separator 9 of the mixed medium power generation system 7 is branched into two streams,
7, heat exchange with the medium-concentration mixed medium liquid is performed, the liquid is returned, and adiabatic expansion is performed by the expansion valve 138 to generate a refrigerant.
Then, the mixture is guided to the heat exchange section of the heat exchanger 34 to cool the exhaust gas of the mixed medium turbine 10, and is guided to the middle of a pipe connecting the throttle valve 16 and the ejector type mixer 12.

Therefore, according to the present embodiment, in addition to the same effects as in the first embodiment, the exhaust pressure at the outlet of the mixed medium turbine 10 is cooled by the refrigerant, so that the back pressure of the mixed medium turbine 10 can be reduced. Therefore, the efficiency of the mixed-medium turbine can be improved, and the effect of improving the power generation efficiency can be achieved.

Third Embodiment (FIG. 4) (corresponding to claim 7) In this embodiment, a heat exchanger is newly installed at the outlet of the mixed medium turbine of the mixed medium power generation system of the first embodiment, similarly to the second embodiment. Then, a refrigerant obtained by adiabatically expanding the high-concentration mixed medium stored in the high-concentration mixed medium liquid storage tank with the newly provided expansion valve is allowed to flow through the heat exchange section of the heat exchanger to cool the heat exchanger. The high-concentration mixed medium vapor is led to a new ejector-type mixer. In addition, the low-concentration mixed-medium liquid stored in the low-concentration mixed-medium storage tank is guided to the ejector-type mixer via the newly-installed throttle valve, and the high-concentration mixed-medium vapor is mixed and absorbed into the newly-installed condenser. The liquid is condensed by cooling with seawater, and the condensed liquid is stored in a medium-concentration mixed-medium storage tank, thereby coping with load fluctuation.

FIG. 4 is a system diagram showing a configuration and a flow of such a near-city nuclear power plant, and mainly describes a mixed-medium power generation plant. The deep underground transport system 118, the heat supply center 107, and the like shown in the first embodiment will be described with reference to FIG.

As shown in FIG. 4, in the plant of the present embodiment, the heat exchanger 34 is provided between the mixed medium turbine 10 and the ejector type mixer 12 of the mixed medium power generation system 7b in the same manner as in the second embodiment. Is installed.

Further, a refrigerant generation system 119 composed of an expansion valve 120, an ejector type mixer 121, a throttle valve 122 and a condenser 23 is newly installed. And
The high-concentration mixed medium liquid storage tank 112 of the deep-depth underground transport system 118 converts the high-concentration mixed medium liquid into the refrigerant generation system 11.
9 to the expansion valve 120, where after adiabatic expansion,
The heat is guided to the heat exchange section of the heat exchanger 34 of the mixed medium power generation system 7b, and after the heat exchange, the heat is guided to the ejector type mixer 121.

Further, the low-concentration mixed-medium liquid is introduced from the low-concentration mixed-medium liquid storage tank 113 of the deep-depth underground transport system 118 to the throttle valve 122, adiabatically expanded, and ejected by the ejector-type mixer 121. After mixing and absorbing
The liquid is condensed by leading the liquid to a liquid condensing device 123 and performing heat exchange using, for example, seawater. The condensed liquid is conveyed to a medium-concentration mixed medium liquid storage tank 114 by a conveying pump 124 and stored.

According to the third embodiment having such a configuration,
The same operation as in the first embodiment is performed, but the following points are different.

That is, during the daytime when power demand is high, the refrigerant is passed through the heat exchange section of the heat exchanger 34 for cooling the exhaust gas of the mixed medium turbine 10 by operating the refrigerant generation system 119,
By lowering the back pressure at the outlet of the mixed-medium turbine 10 and increasing the adiabatic expansion of the mixed-medium vapor by the mixed-medium turbine 10, the conversion of the mixed-medium turbine 10 to mechanical energy is increased, and the power generation amount is increased. Can be used to meet peak power demand.

According to the present embodiment, in addition to the same effects as in the first embodiment, the amount of heat conducted in the structure from the mixed medium turbine 10 to the ejector type mixer 121 is removed by the mixed medium refrigerant. By reducing the pressure at the outlet of the mixed-medium turbine 10, the amount of conversion of the mixed-medium turbine 10 to mechanical energy is increased to increase the amount of power generation, and to cope with peak power during the day. At this time, the high-concentration mixed medium used can contribute to load leveling by using the medium-concentrated mixed medium separated and stored using nuclear energy when nighttime power demand is small. In addition, by sharing pipes laid underground at a large depth to store a high concentration mixed medium, equipment costs can be reduced.

Fourth Embodiment (FIG. 5) (Embodiment 8) In this embodiment, a low-concentration mixing system in which steam discharged from a mixed-medium turbine of the mixed-medium power generation system of the first embodiment is separated by a high-pressure separator. In addition to a configuration in which the medium liquid is absorbed by an ejector-type mixer and guided to a condenser to cool using seawater, air, and river water, it is transported to a concentration difference energy production system over a long distance from a medium concentration mixed medium storage tank. The medium-concentration mixed medium liquid is guided to the heat exchange section of the condenser to be cooled, and the medium-concentration mixed medium is guided to the heat exchanger for cooling the low-concentration mixed medium liquid separated by the high-pressure separator. Is conducted to the medium pressure separator of the concentration difference energy production system, thereby coping with load fluctuation.

FIG. 5 is a system diagram showing a configuration and a flow of such a near-city nuclear power plant, and mainly describes a mixed-medium power generation plant. The deep underground transport system 118, the heat supply center 107, and the like shown in the first embodiment will be described with reference to FIG.

As shown in FIG. 5, in the plant of this embodiment, the pressurizing pump 19 of the concentration difference energy producing system 8 causes the high-pressure separator 9 of the mixed-medium power generation system 7c to have a low-concentration mixed medium outlet side. The pipe 13c connected to the heat exchange section of the heat exchanger 15 has a pipe section that passes through the heat exchange section of the condenser 13 of the mixed-medium power generation system 7c. As a result, the medium-concentration mixed medium liquid stored in the medium-concentration mixed medium liquid storage tank 114 of the deep-depth underground transport system 118 is subjected to heat exchange in the condenser 13 and heated, and is again heated by the heat exchange unit of the heat exchanger 115. , Heat is exchanged and heated, and then guided to the medium-pressure separator 17.

According to the fourth embodiment having such a structure,
The same operation as in the first embodiment is performed, but the following points are different.

That is, in the night when power demand is low, the medium-concentration mixed medium liquid stored in the medium-concentration mixed medium liquid storage tank 114 is exchanged with the low-concentration mixed medium separated by the high-pressure separator 9 by the heat exchanger 15. To separate the high-concentration mixed medium and the low-concentration mixed medium, the ejector-type mixer 12
The heat generated when the high-concentration mixed-medium vapor and the low-concentration mixed-medium liquid are mixed and absorbed is recovered by the condenser 13 and guided to the heat exchange section of the heat exchanger 15 for heating. The amount of heat exchange by seawater performed in the above is performed so as to share the amount of heat that could not be recovered with the medium-concentration mixed medium liquid.

According to the present embodiment, in addition to the same effects as those of the first embodiment, the condenser 13 of the mixed-medium power generation system 7c
By recovering the heat released to seawater with the medium concentration mixed medium liquid for producing the concentration difference energy, the thermal efficiency of the nuclear power plant can be improved, and the heat energy released to the environment without being used The amount can be reduced.

Fifth Embodiment (FIG. 6) (corresponding to claim 9) In this embodiment, a heat exchanger for cooling steam discharged from the mixed medium turbine of the mixed medium power generation system of the fourth embodiment is provided by an ejector. The intermediate concentration mixed medium liquid conveyed over a long distance from the medium concentration mixed medium storage tank is branched and cooled to the concentration difference energy production system used for cooling the condenser, and cooled. It leads to the medium pressure separator of the concentration difference energy production system, and also branches the mixed medium pressurized by the pressurizing pump to this heat exchanger, performs heat exchange, and leads to the heat exchanger of the reactor system. By doing so, it is possible to cope with load fluctuations.

FIG. 6 shows the system configuration of this embodiment.

As shown in FIG. 6, in this embodiment, a heat exchanger 34 is installed between the mixed medium turbine 10 and the ejector type mixer 12 of the mixed medium power generation system 7d, and the cooling in the heat exchanger 34 is performed. As a recording medium, two types of media are used. That is, as the first medium, a medium obtained by branching the flow of the medium-concentration mixed medium cooled by the condenser 13 is used, and the branched medium is guided to the heat exchange section of the heat exchanger 34. The difference energy production system 8 is led to the intermediate pressure separator 17.

The second refrigerant is a pressure pump 1
The flow of the mixed medium pressurized in 4 is branched, and the flow is guided to the heat exchange section of the heat exchanger 34 to perform heat exchange. After the heat exchange, this refrigerant is integrated with natural circulation BWR
It is led to the heat exchanger 5 of the reactor system 1 to perform heat exchange,
Thereafter, the structure is further led to the high-pressure separator 9.

In the present embodiment, in addition to the operation of the fourth embodiment, in the daytime when power demand is high, the mixed medium pressurized by the pressurizing pump 14 is diverted and the heat exchange section of the heat exchanger 34 is guided. Heat exchange is performed, and thereafter, the liquid is guided to the heat exchanger 5 of the nuclear reactor system 1 and heated by the heat exchange, and further guided to the high-pressure separator 9 to be separated into vapor and liquid. The outlet steam of the mixed media turbine 10 is cooled to reduce steam pressure, thereby improving turbine efficiency and increasing power generation, thereby addressing peak power demand.

At night when power demand is small,
The medium-concentration mixed medium liquid stored in the medium-concentration mixed medium liquid storage tank 114 is guided to the heat exchange section of the condenser 13, where it is diverted after heat exchange and guided to the heat exchange section of the heat exchanger 14, Here, the mixture is heated by heat exchange, guided to the medium pressure separator 17, and separated into a high concentration mixed medium and a low concentration mixed medium.

According to the present embodiment, in addition to the effect of the fourth embodiment, the heat of the steam discharged from the mixed medium turbine 10 of the mixed medium power generation system 7d is reduced.
By recovering with a middle concentration mixed medium liquid for producing the concentration difference energy, the mixed medium turbine outlet back pressure can be reduced, and the turbine efficiency can be improved. At the same time, the overall thermal efficiency of the nuclear power plant system 1 can be improved, and the amount of heat energy released to the environment without being used can be reduced.

Sixth Embodiment (FIG. 7) (corresponding to claim 10) This embodiment is characterized in that the outlet side of the low-concentration mixed medium liquid separated by the high-pressure separator of the mixed medium power generation system of the fifth embodiment is
A pressure reducing valve and an intermediate-pressure separator are inserted between the heat exchanger connected to the high-concentration separator and the high-concentration mixed-media vapor separated by the intermediate-pressure separator is guided to the middle stage of the mixed-medium turbine. is there.

FIG. 7 is a diagram showing a system configuration of the present embodiment.

As shown in FIG. 7, the mixed-medium power generation system 7e according to the present embodiment includes an outlet side of the low-concentration mixed-medium liquid separated by the high-pressure separator 9 and a heat exchanger 15 connected thereto. Between the pressure reducing valve 36 and the intermediate pressure separator 37,
The high-concentration mixed medium vapor separated by the medium-pressure separator 37 is guided to the middle stage of the mixed medium turbine 10.

Then, the low-concentration mixed medium liquid separated by the high-pressure separator 9 is depressurized by the pressure reducing valve 36 and is supplied to the intermediate-pressure separator 37.
And separated into a high-concentration mixed-medium vapor and a low-concentration mixed-medium liquid in the medium-pressure separator 37. The separated high-concentration mixed medium vapor is guided to and driven by the middle stage of the mixed medium turbine 10. Further, the separated low-concentration mixed medium liquid is guided to the heat exchanger 15 and is stored in the medium-concentration mixed medium storage tank 11.
The medium-concentration mixed medium liquid stored in 4 is branched from the medium-concentration mixed medium liquid pressurized by the pressurizing pump 19, or the condensate from the liquid condenser 13 is pressurized by the pressurizing pump 14 and branched. The configuration is such that heat exchange is performed.

According to such a configuration, the following operation is performed in addition to the same operation as the fifth embodiment.

That is, in the daytime when power demand is high, the low-concentration mixed medium liquid separated by the high-pressure separator 9 of the mixed-medium power generation system 35 is guided to the pressure reducing valve 36 to be reduced in pressure. And separated into a high concentration mixed medium vapor and a low concentration mixed medium liquid. The high-concentration mixed-medium vapor is guided to the middle stage of the mixed-medium turbine 10 and driven to generate electric power by a coaxially coupled generator 11. The low-concentration mixed medium liquid is led to the heat exchanger 15 and
The heat exchange is performed with the mixed medium pressurized in step (1), and the mixture is guided to the throttle valve 16. The mixed medium that has exchanged heat in the heat exchanger 15 is guided to the heat exchanger 5 of the nuclear reactor system, heated and guided to the high-pressure separator 9.

At night when power demand is small,
The low-concentration mixed-medium liquid separated by the high-pressure separator 9 of the mixed-medium power generation system 35 is led to the pressure reducing valve 36 to be decompressed.
Subsequently, the mixture is guided to the medium pressure separator 37 and separated into a high concentration mixed medium vapor and a low concentration mixed medium liquid. The high-concentration mixed-medium vapor is guided to the middle stage of the mixed-medium turbine 10 and is driven to generate electric power by a coaxially coupled generator 11. The low-concentration mixed medium liquid was guided to the heat exchanger 15, and the medium-concentration mixed medium liquid stored in the medium-concentration mixed medium storage tank 114 was pressurized by the pressure pump 19, and heat exchange was performed by the condenser 13. thing,
Then, the condensate of the condensate 13 is heat-exchanged with the condensate which is pressurized by the pressurizing pump 14, and is guided to the throttle valve 16. Heat exchanger 1
The medium-concentration mixed medium liquid subjected to the heat exchange in Step 5 is guided to the medium-pressure separator 17 of the concentration difference energy producing system 8, and the condensate of the condensate 13 subjected to heat exchange in the heat exchanger 15 is It is guided to the heat exchanger 5 of the nuclear reactor system, heated and guided to the high-pressure separator 9.

According to this embodiment, in addition to the same effects as in the fifth embodiment, the low-concentration mixed medium liquid separated by the high-pressure separator 9 is further mixed with the high-concentration mixed medium vapor by the medium-pressure separator. The high-concentration mixed-medium vapor is separated into a medium liquid, and the high-concentration mixed-medium vapor is guided to the middle stage of the mixed-medium turbine 10, and is driven to generate electric power by the coaxially-coupled generator 11, thereby generating power in the reactor system 1. The conversion efficiency of heat energy to electric energy can be improved.

Seventh Embodiment (FIG. 8) (corresponding to claim 11) In this embodiment, a high-concentration mixed-medium vapor separated by an intermediate-pressure separator of a mixed-medium power generation system according to a sixth embodiment is used in the middle stage of a mixed-medium turbine. Instead, the high-concentration mixed-medium vapor is condensed by the newly installed condensate, adiabatically expanded by the expansion valve to generate refrigerant, and then passed through the heat exchanger of the heat exchanger at the mixed-medium turbine outlet. The guide is guided to the inlet side of the throttle valve of the mixer.

FIG. 8 shows the system configuration of the present embodiment.

As shown in FIG. 8, the mixed-medium power generation system 7f of the present embodiment is different from the medium-pressure separator 37 in that the piping connected to the middle part of the mixed-medium turbine 10 is replaced by a newly installed condenser 40. And the expansion valve 41, the expansion valve 41 is connected to the heat exchange part of the heat exchanger 34 at the outlet of the mixed medium turbine 10, and the other end is connected to the throttle valve 16 and the ejector type mixer 12 at the connection piping part. It is to be combined with.
Unlike the sixth embodiment, the heat exchanger 34 does not employ the medium-concentration mixed medium pressurized by the pressurizing pump 19 and the heat exchange by pressurized by the pressurizing pump 14 and condensed liquid. The other end of the heat exchange part of the condenser 13 connected to the pressure pump 19 is connected to the heat exchange part of the condenser 40, and the other end is connected to the intermediate pressure separator 17. Further, the pressurizing pump 14 and the condenser 4
The other end is connected to the heat exchange part of the heat exchanger 5 of the reactor system, and the other end is connected to the high pressure separator 9.

According to such a configuration, the following operation is performed in addition to the same operation as the sixth embodiment.

That is, in the daytime when power demand is high, the high-concentration mixed-medium vapor separated by the medium-pressure separator 37 of the mixed-medium power generation system 7 is guided to the condenser 40 and pressurized by the pressurizing pump 14. Heat exchange is performed with the condensed liquid thus obtained, and the liquid is condensed. This condensed liquid is guided to the expansion valve 41 and adiabatically expanded to generate a refrigerant, and the heat exchanger 34 at the outlet of the mixed medium turbine 10 is formed.
The exhaust gas of the mixed medium turbine 10 is cooled by the heat exchange section, and is guided between the throttle valve 16 and the ejector type mixer 12 to be mixed and absorbed. The condensate that has undergone heat exchange in the condensate condenser 40 is led to the heat exchange section of the heat exchanger 5 of the reactor system,
It is heated and guided to the high-pressure separator 9.

In the daytime when power demand is small, the high-concentration mixed medium vapor separated by the medium-pressure separator 37 of the mixed medium power generation system 7 is guided to the condenser 40 and heat exchange is performed in the condenser 13. Heat exchange is performed with the medium-concentration mixed medium liquid, and the liquid is returned. The condensed liquid is guided to the expansion valve 41 to generate a refrigerant by adiabatic expansion. The refrigerant is guided to the heat exchange part of the heat exchanger 34 at the outlet of the mixed medium turbine 10 to cool the mixed medium turbine 10 exhaust gas. It is guided between the valve 16 and the ejector type mixer 12 and mixed and absorbed. The medium-concentration mixed medium liquid having undergone heat exchange in the condenser 40 is guided to the medium-pressure separator 17 of the concentration difference energy production system 8.

In the daytime when power demand is high, the refrigerant is passed through the heat exchange section of the heat exchanger 34 for cooling the exhaust gas of the mixed medium turbine 10 by operating the refrigerant generation system 119, and the back pressure at the outlet of the mixed medium turbine 10 is reduced. To increase the adiabatic expansion of the mixed-medium vapor by the mixed-medium turbine 10, thereby increasing the conversion of the mixed-medium turbine to mechanical energy and increasing the amount of power generation to meet peak power demand.

According to the present embodiment, in addition to the same effects as in the sixth embodiment, the refrigerant is generated by the high-concentration mixed medium vapor separated by the medium pressure separator 37 of the mixed medium power generation system 7f, By cooling the steam discharged from the turbine, the pressure at the outlet of the mixed-medium turbine can be reduced, the amount of mechanical energy recovered by the mixed-medium turbine can be increased, and the power generation efficiency can be improved.

Eighth Embodiment (FIG. 9) (corresponding to claim 12) In this embodiment, while the concentration difference energy production system 8 of the first to seventh embodiments is deleted, the reactor system 1 and the mixed medium An intermediate heat circuit 44 is newly provided between the power generation system 7g and the circulation pump 43 and the heat exchanger 42. The mixed medium that has exchanged heat in the heat exchanger 42 of the intermediate heat circuit 44 is guided to the high-pressure separator 9 of the mixed-medium power generation system 7g, where the high-concentration mixed medium vapor and the low-concentration mixed medium liquid are mixed. Is separated into The high-concentration mixed medium vapor is diverted by the branch pipe and guided to the mixed medium turbine 10 and the newly installed condenser 45. In the condenser 45, the high-concentration mixed-medium vapor is condensed to become a high-concentration mixed-medium liquid, and the high-concentration mixed-medium liquid is stored in the high-concentration mixed-medium storage tank of the deep underground transport system 118 shown in FIG. It is led to 112. The high-concentration mixed-medium steam is guided to the mixed-medium turbine 10 to drive it, thereby
After being supplied as power for power generation by 1, it is guided to an ejector-type mixer 12.

On the other hand, the low-concentration mixed medium liquid separated by the high-pressure separator 9 is guided to the heat exchanger 15, diverted after heat exchange, and guided to the throttle valve 16 and the low-concentration mixed medium liquid storage tank 113. . The throttle valve 16 reduces the pressure of the low-concentration mixed-medium liquid, and the reduced-pressure low-concentration mixed-medium liquid is guided to the ejector-type mixer 12 to mix and absorb the high-concentration mixed-medium vapor discharged from the mixed-medium turbine 10. The liquid is guided to a liquid container 13, where the liquid is exchanged with seawater (deep seawater) 103 for heat exchange, and the liquid is returned to the heat exchanger 15 by the pressurizing pump 14. In this case, the medium-density mixed medium storage tank 1
As shown in FIGS. 2 and 9, the medium-concentration mixed medium stored in the pressurized medium 14 is pressurized by the pressurizing pump 117, guided to the pressurizing pump 14 of the mixed-medium power generation system 7 g, and returned from the liquid condensing unit 13. Merge with liquid.

Then, the medium-concentration mixed medium liquid and the condensed liquid pressurized by the pressurizing pump 14 are then separated and condensed into a condensate
And the heat exchanger 15. The medium-concentration mixed medium liquid and the condensate that have been subjected to heat exchange in the condenser 45 and the heat exchanger 15 are led to the heat exchanger 42 of the intermediate heat circuit 44, where they are subjected to heat exchange and then subjected to high-pressure separation. Circulates to vessel 9.

In the eighth embodiment having such a structure, substantially the same operation as that of the above-described first embodiment is performed, but the following points are different.

That is, during the daytime when power demand is high, the mixed medium liquid is pressurized and flows into the heat exchange section of the heat exchanger 42 of the intermediate heat circuit 44. The high-concentration mixed medium vapor thus separated is guided to a 7 g high-pressure separator 9, and the separated high-concentration mixed medium vapor is guided to a mixed medium turbine 10 without branching to the condenser 45 side by operating a valve (not shown). Generator 1 to be combined
1 for power generation. Further, the low-concentration mixed medium liquid separated by the high-pressure separator 9 is guided to the heat exchanger 15, and after the heat exchange, also guided to the throttle valve 16 without branching.

On the other hand, during nighttime when power demand is small,
The mixed medium liquid was pressurized and flowed through the heat exchange section of the heat exchanger 42 of the intermediate heat circuit 44, and the high-temperature heat-exchanged liquid was guided to the high-pressure separator 9 of the mixed medium power generation system 7g and separated. The high-concentration mixed-medium vapor is branched into two, and one is guided to the mixed-medium turbine 10, and the other is guided to the condenser 45. Condenser 4
The high-concentration mixed medium vapor guided to 5 is condensed by heat exchange with the condensed medium from the condensate 13 pressurized by the pressurizing pump 14 and the medium-concentrated mixed medium liquid, and is condensed. It is conveyed to the high concentration mixed medium storage tank 112 of 118. On the other hand, the condensed liquid and the medium-concentration mixed medium liquid that have undergone heat exchange in the condenser 45 are led to the heat exchange section of the heat exchanger 42 of the intermediate heat circuit 44, where they are heated and subjected to high-pressure separation of the mixed medium power generation system 7g. It is led to the vessel 9. The low-concentration mixed medium liquid separated by the high-pressure separator 9 performs heat exchange in the heat exchange section of the heat exchanger 15,
After the effluent, the water is separated, one of which is guided to the ejector-type mixer 12 through the throttle valve 16, and the other of which is guided to the low concentration mixed medium storage tank 113 of the deep underground transportation system 118.
The condensed liquid and the medium-concentration mixed medium liquid that have undergone heat exchange in the heat exchanger 15 are guided to the heat exchange section of the heat exchanger 42, heated and guided to the high-pressure separator 9. Medium concentration mixed medium storage tank 114
The medium-concentration mixed medium and the mixed medium condensed by the condenser 13 are pressurized by the pressurizing pump 14 and guided to the condenser 45 and the heat exchanger of the heat exchanger 15.

That is, according to the eighth embodiment,
The following effects are obtained in addition to the effects similar to those of the above-described first embodiment.

From the operation used to separate all of the heat exchanged in the intermediate heat circuit 44 or all of the heat generated in the nuclear reactor system 1 into a high-concentration mixed medium and a low-concentration mixed medium, a concentration difference energy is generated. The operation can be performed at a free rate, up to the operation of only power generation that does not.

By using an aqueous medium for the intermediate heat circuit 44, the outlet temperature of the core of the reactor system 1 can be increased, and the outlet steam temperature of the heat exchange section of the heat exchanger 5 of the reactor system 1 can be increased. Can be increased, and when a steam turbine is provided in the intermediate heat circuit 44, high power generation efficiency can be obtained.

Ninth Embodiment (FIG. 10)
Response) Figure 10 is a system configuration diagram showing a ninth embodiment of the present invention.

This embodiment is a modification of the eighth embodiment, in which the mixed-medium power generation system 7h
0 is absorbed by the ejector-type mixer 12 in the low-concentration mixed medium liquid separated by the high-pressure separator 9, and is returned to the seawater (deep cold seawater) 103 or the atmosphere by the condenser 13.
Under the configuration of cooling using river water or the like, the medium-concentration mixed medium liquid conveyed from the medium-concentration mixed medium liquid storage tank 114 of the deep underground conveyance system 118 shown in FIG. The mixed medium liquid from the ejector mixer 12 is cooled, and the medium-concentrated mixed medium liquid used for the cooling is supplied to the pressure pump 1.
4 to the entrance side. That is, the heat exchange portion of the condenser 13 of the mixed-medium power generation system 7h is connected to the medium-concentration mixed-medium storage tank 114, and the other end of the heat exchange portion is connected to the inlet side of the pressure pump 14.

In such a configuration, substantially the same operation as in the eighth embodiment is performed, but the following points are different.

That is, at night when power demand is small,
The medium-concentration mixed-medium liquid stored in the medium-concentration mixed-medium storage tank 114 is guided to the heat exchange section of the condenser 13 and the heat-exchanged liquid is guided to the inlet side of the pressure pump 14. The recondensed mixed medium is combined with the pressurized pump 14 and pressurized, then branched and led to the heat exchanger of the recondenser 45 and the heat exchanger 15.

Thus, according to the present embodiment, in addition to the same effects as in the eighth embodiment, the medium-concentration mixed medium liquid storage tank 1
The medium-concentration mixed medium liquid stored in 14 is guided to the heat exchange section of the condenser 13 to perform heat exchange to perform heat recovery.
The amount of heat released to the seawater in the condenser 13 can be reduced, and the effect of being beneficial to global environmental protection is achieved.

Tenth Embodiment (FIG. 11)
A) In the present embodiment, the high-concentration mixed-medium vapor separated by the high-pressure separator of the mixed-medium power generation system in the ninth embodiment is not branched and guided to the condenser, and the exhaust gas of the mixed-medium turbine is condensed. And heat-exchanged the low-concentration mixed medium separated by the high-pressure separator and only transported to the low-concentration mixed-medium storage tank without branching, and cooled with a throttle valve, ejector-type mixer, and seawater The condensate is removed.

That is, in this embodiment, as shown in FIG. 11, the mixed-medium power generation system 7i has a configuration in which the high-concentration mixed-medium steam separated by the high-pressure separator 9 is guided to the mixed-medium turbine 10 without branching. Then, the condensate of the turbine exhaust in the condenser 45 is transferred by the transfer pump 125 to the high-concentration mixed medium liquid storage tank 11 of the deep underground transfer system 118.
2.

Further, the medium obtained by heat-exchanging the measured concentration mixed medium separated by the high-pressure separator 9 in the heat exchanger 15 is conveyed to the low-concentration mixed medium storage tank 113 without branching. In this embodiment, the throttle valve 16, the ejector-type mixer 12, and the liquid condenser 13 cooled with seawater used in the ninth embodiment are omitted. Thus, the medium-concentration mixed medium stored in the medium-concentration mixed-medium storage tank 114 is pressurized by the pressurizing pump 14 and transported to the liquid condensing unit 45 and the heat exchange unit of the heat exchanger 15.

According to such a structure, substantially the same operation as that of the ninth embodiment is performed, but the following points are different.

That is, the high-concentration mixed-medium vapor separated by the high-pressure separator 9 is guided to the mixed-medium turbine 10, and is driven to generate electric power by the coaxially coupled generator 11.
The exhaust gas is led to the liquid condenser 45 to become liquid concentrated, and is conveyed to the high concentration mixed medium liquid storage tank 112 by the conveyance pump 125. Then, after the low-concentration mixed medium liquid separated by the high-pressure separator 9 is subjected to heat exchange in the heat exchanger 15, it is conveyed to the low-concentration mixed medium storage tank 113, and the medium-concentration mixed medium liquid storage tank 114
The medium-concentration mixed medium liquid stored in the intermediate heat circuit 44 is pressurized by the pressurizing pump 14 and guided to the condenser 45 and the heat exchanging section of the heat exchanger 15 to perform heat exchange. Container 42
, And is heated and circulated to the high-pressure separator 9.

According to the present embodiment, in addition to the same effects as in the ninth embodiment, the heat generated in the reactor system 1 is used to separate the high-concentration mixed medium vapor and the low-concentrated mixed medium liquid, and In order to convert the power generated by driving the turbine with the mixed-medium vapor to a high-concentration mixed-medium liquid, heat recovery is performed by exchanging heat with the medium-concentration mixed-medium liquid that has reached ambient temperature during transport over long distances. By doing so, the concentration difference energy can be efficiently obtained by eliminating waste heat to seawater. Further, since a throttle valve, an ejector type mixer, a condenser for seawater cooling, and the like are eliminated, construction costs can be reduced.

Eleventh Embodiment (FIG. 12)
Response) Figure 12 is a system configuration diagram showing an eleventh embodiment of the present invention.

As shown in FIG. 12, in the present embodiment, the mixed-medium power generation system 7j is
An ejector-type mixer 128 is provided between the high-pressure separator 9 and the liquid condenser 45, and is branched from a pipe connecting the high-pressure separator 9 and the mixed-medium turbine 10. And the condenser 1
26 and the expansion valve 127 are installed, and the ejector-type mixer 1
28 and a pressure pump 1
The medium-concentration mixed medium pressurized at 4 is guided, and the other end is connected to the heat exchange section 42 of the intermediate heat circuit 44.

In such a configuration, the high pressure separator 9
The high-concentration mixed-medium vapor separated in the step is branched and guided to the mixed-medium turbine 10 and the condenser 126. The high-concentration mixed-medium vapor guided to the mixed-medium turbine 10 drives the mixed-medium turbine 10, generates electric power with the exhaust 11 connected coaxially, and is guided to the ejector-type mixer 128. The high-concentration mixed medium vapor led to the condenser 126 is supplied to the pressure pump 14.
The refrigerant is condensed and heat-exchanged with the medium-concentration mixed medium, and the liquid is condensed. The condensed liquid is guided to the expansion valve 127, adiabatically expanded to generate a refrigerant, guided to the ejector type mixer 128, and guided to the ejector mixer 128. The exhausted high-concentration mixed medium vapor is suction-mixed, cooled, and led to the condenser 45. Medium pressure mixed medium storage tank 1
The medium-concentration mixed medium liquid stored in 14 is pressurized by the pressurizing pump 14, branched and led to the heat exchange section of the condenser 126, heat-exchanged and heated by the intermediate heat circuit 44. The heat is guided to the heat exchange section of the exchanger 42, heated and guided to the high-pressure separator 9.

Therefore, according to the present embodiment, the tenth
In addition to the same effects as in the embodiment, by mixing the exhaust gas of the mixed medium turbine with the ejector using the refrigerant, the mixed medium turbine back pressure can be reduced, the mixed medium turbine efficiency can be improved, and the power generation efficiency can be improved. .

Twelfth Embodiment (FIG. 13)
A) In the present embodiment, a pressure reducing valve and a middle valve are provided between the outlet side of the low-concentration mixed medium liquid separated by the high-pressure separator of the mixed medium power generation system in the eighth embodiment and the heat exchanger connected thereto. A high-pressure mixed medium vapor separated by the medium-pressure separator is introduced into the middle stage of the mixed-medium turbine by inserting a high-pressure separator.

FIG. 13 is a system configuration diagram shown in this embodiment.

As shown in FIG. 13, in the present embodiment, the mixed medium power generation system 7k is different from the mixed medium power generation system 7g shown in FIG. The pressure reducing valve 130 and the medium pressure separator 131 are inserted between the outlet side and the heat exchanger 15 connected thereto, and the high-concentration mixed medium vapor separated by the medium pressure separator 131 is mixed with the mixed medium turbine 10. There is a configuration that leads to the middle stage. As a result, the low-concentration mixed medium liquid separated by the high-pressure separator 9 is depressurized by the pressure reducing valve 130 and is supplied to the medium-pressure separator 131.
Is to be led to.

The low-concentration mixed medium liquid guided to the medium-pressure separator 131 is separated into a high-concentration mixed medium vapor and a low-concentration mixed medium liquid, and the high-concentration mixed medium vapor is mixed with the mixed medium turbine 10.
This is driven by being guided to the middle stage. The low-concentration mixed medium liquid is guided to the heat exchanger 15 and the medium-concentration mixed medium liquid stored in the medium-concentration mixed medium storage tank 114 is guided to the inlet side of the pressurizing pump 14 or The condensate is pressurized by the pressurizing pump 14 to exchange heat.

In such a configuration, the same operation as in the eighth embodiment is performed, but differs in the following points.

That is, in the daytime when power demand is high, the low-concentration mixed medium liquid separated by the high-pressure separator 9 of the mixed-medium power generation system 132 is guided to the pressure reducing valve 130 to be reduced in pressure. And separated into a high concentration mixed medium vapor and a low concentration mixed medium liquid. The high-concentration mixed-medium vapor is guided to the middle stage of the mixed-medium turbine 10 and driven to generate electric power by a coaxially coupled generator 11.
The low-concentration mixed medium liquid is guided to the heat exchanger 15, exchanges heat with the condensed liquid pressurized by the pressure pump 14, and is guided to the throttle valve 16. The condensed liquid that has been subjected to heat exchange in the heat exchanger 15 is guided to the heat exchanger 42 of the intermediate heat circuit 44, heated and guided to the high-pressure separator 9.

At night when power demand is small,
The low-concentration mixed medium liquid separated by the high-pressure separator 9 of the mixed-medium power generation system 132 is guided to the pressure reducing valve 130 to be depressurized, and then guided to the medium-pressure separator 131 to be mixed with the high-concentration mixed medium vapor and the low-concentration mixed medium. It is separated into a medium liquid. The high-concentration mixed-medium vapor is guided to and drives the middle stage of the mixed-medium turbine 10, and power is generated by a generator 11 that is coaxially coupled. The low-concentration mixed-medium liquid is guided to the heat exchanger 15 and the medium-concentration mixed-medium liquid stored in the medium-concentration mixed-medium storage tank 114 is guided to the inlet side of the pressure pump 14. The condensed liquid is heat-exchanged with the pressurized liquid by the pressurizing pump 14 and guided to the throttle valve 16. The medium-concentration mixed medium liquid having undergone heat exchange in the heat exchanger 15 and the condensate in the condenser 13 are led to the heat exchanger 42 of the intermediate heat circuit 44 and heated, and then led to the high-pressure separator 9.

According to the present embodiment, in addition to the same effects as in the eighth embodiment, the low-concentration mixed medium liquid separated by the high-pressure separator 9 is further subjected to the high-concentration mixed medium vapor and the low-concentration mixed medium by the medium-pressure separator. The high-concentration mixed-medium vapor is guided to the middle stage of the mixed-medium turbine 10 and is driven to generate electric power by the coaxially-coupled generator 11, thereby generating heat energy generated in the reactor system 1. Can be efficiently converted into electric energy.

Thirteenth Embodiment (FIG. 14)
A) In this embodiment, a pressure reducing valve and a pressure reducing valve are provided between the outlet side of the low-concentration mixed medium liquid separated by the high-pressure separator of the mixed-medium power generation system in the ninth embodiment and the heat exchanger connected thereto. A high-pressure mixed medium vapor separated by the medium-pressure separator is introduced into the middle stage of the mixed-medium turbine by inserting a high-pressure separator.

FIG. 14 is a system configuration diagram shown in this embodiment.

As shown in FIG. 14, in the present embodiment, the mixed medium power generation system 71 is different from the mixed medium power generation system 7g shown in FIG. The pressure reducing valve 130 and the medium pressure separator 131 are inserted between the outlet side and the heat exchanger 15 connected thereto, and the high-concentration mixed medium vapor separated by the medium pressure separator 131 is mixed with the mixed medium turbine 10. There is a configuration that leads to the middle stage. Thereby, the low-concentration mixed medium liquid separated by the high-pressure separator 9 is depressurized by the pressure reducing valve 130 and
1 is led. This medium pressure separator 131
The low-concentration mixed-medium liquid guided to the above is separated into a high-concentration mixed-medium vapor and a low-concentration mixed-medium liquid, and the high-concentration mixed-medium vapor is guided to the middle stage of the mixed-medium turbine 10 to drive it.
The low-concentration mixed-medium liquid is guided to the heat exchanger 15, and the medium-concentration mixed-medium liquid stored in the medium-concentration mixed-medium storage tank 114 is passed through the heat exchange section of the condenser 13, or The condensed liquid of No. 13 is pressurized by the pressurizing pump 14 and is branched to perform heat exchange.

In such a configuration, the same operation as in the ninth embodiment is performed, but differs in the following points.

That is, in the daytime when power demand is high, the low-concentration mixed medium liquid separated by the high-pressure separator 9 of the mixed-medium power generation system 132 is led to the pressure reducing valve 130 to be reduced in pressure. And separated into a high concentration mixed medium vapor and a low concentration mixed medium liquid. The high-concentration mixed-medium vapor is guided to the middle stage of the mixed-medium turbine 10 and driven to generate electric power by a coaxially coupled generator 11.
The low-concentration mixed medium liquid is guided to the heat exchanger 15, exchanges heat with the condensed liquid pressurized by the pressure pump 14, and is guided to the throttle valve 16. The condensed liquid that has been subjected to heat exchange in the heat exchanger 15 is guided to the heat exchanger 42 of the intermediate heat circuit 44, heated and guided to the high-pressure separator 9.

At night when power demand is small,
The low-concentration mixed medium liquid separated by the high-pressure separator 9 of the mixed-medium power generation system 132 is guided to the pressure reducing valve 130 to be depressurized, and then guided to the medium-pressure separator 131 to be mixed with the high-concentration mixed medium vapor and the low-concentration mixed medium. It is separated into a medium liquid. The high-concentration mixed-medium vapor is guided to and drives the middle stage of the mixed-medium turbine 10, and power is generated by a generator 11 that is coaxially coupled. The low-concentration mixed-medium liquid is guided to the heat exchanger 15 and the medium-concentration mixed-medium liquid stored in the medium-concentration mixed-medium storage tank 114 is guided to the inlet side of the pressure pump 14. The condensed liquid is heat-exchanged with the pressurized liquid by the pressurizing pump 14 and guided to the throttle valve 16. The medium-concentration mixed medium liquid having undergone heat exchange in the heat exchanger 15 and the condensate in the condenser 13 are led to the heat exchanger 42 of the intermediate heat circuit 44 and heated, and then led to the high-pressure separator 9.

According to this embodiment, in addition to the same effects as in the ninth embodiment, the low-concentration mixed medium liquid separated by the high-pressure separator 9 is further subjected to the high-concentration mixed medium vapor and the low-concentration mixed medium by the medium-pressure separator. The high-concentration mixed-medium vapor is guided to the middle stage of the mixed-medium turbine 10 and is driven to generate electric power by the coaxially-coupled generator 11, thereby generating heat energy generated in the reactor system 1. Can be efficiently converted into electric energy.

Fourteenth Embodiment (FIG. 15)
A) This embodiment is a modification of the thirteenth embodiment.

FIG. 15 is a system configuration diagram showing the present embodiment.

As shown in FIG. 15, in the present embodiment, the mixed-medium power generation system 7m is different from the mixed-medium power generation system 71 shown in FIG. The condensate condenser 45 to be condensed is changed so as to guide the high-concentration mixed medium vapor of the medium-pressure separator 131,
The configuration is such that the connection from the intermediate pressure separator 131 to the mixed medium turbine 10 is eliminated. Then, the high-concentration mixed medium separated by the intermediate-pressure separator 131 is guided to the liquid condensing device 45, condensed, and conveyed to the high-concentration mixed medium liquid storage tank 112. The medium-concentration mixed medium pressurized by the pressurizing pump 14 and the condensed liquid condensed by the liquid condensing device 13 are guided to a heat exchange section of a liquid condensing device 45, where they are exchanged and heated, and are heated.
, And is heated and guided to the high-pressure separator 9.

In such a configuration, the same operation as in the thirteenth embodiment is performed, but differs in the following points.

That is, the low-concentration mixed medium liquid separated by the high-pressure separator 9 of the mixed medium power generation system 48 is supplied to the pressure reducing valve 130.
, The pressure is reduced, and then guided to the medium-pressure separator 131 to be separated into a high concentration mixed medium vapor and a low concentration mixed medium liquid. The high-concentration mixed-medium vapor is guided to the liquid condensing device 45 and returned to the high-concentration mixed-medium liquid storage tank 112. Then, the medium-concentration mixed medium that has been pressurized by the pressurizing pump 14 and has passed through the heat exchange section of the condenser 13 and the condensed liquid that has been condensed by the condenser 13 are led to the heat exchange section of the condenser 45. Then, it is heated by performing heat exchange, guided to the heat exchange section of the heat exchanger 42 of the intermediate heat circuit 44, heated and guided to the high-pressure separator 9.

According to this embodiment, in addition to the same effects as in the thirteenth embodiment, the low-concentration mixed medium liquid separated by the high-pressure separator 9 is further mixed with the high-concentration mixed medium vapor by the medium-pressure separator. The high-concentration mixed-medium vapor is separated and transferred to the high-concentration mixed-medium liquid storage tank 112 to produce concentration difference energy, thereby enabling power generation and heat utilization. Is done.

Fifteenth Embodiment (FIG. 16)
A) In the present embodiment, the condenser for branching and condensing the high-concentration mixed medium vapor of the high-pressure separator in the mixed medium power generation system of the thirteenth embodiment is changed to return the mixed medium turbine exhaust. , Throttle valve, ejector type mixer and seawater cooling condensate.

FIG. 16 is a system configuration diagram shown in this embodiment.

As shown in FIG. 16, in the present embodiment, the mixed medium power generation system 7n is different from the mixed medium power generation system 71 shown in FIG. A condenser 45 for returning the liquid is installed at a position where the exhaust gas from the mixed medium turbine 10 is recovered, and the throttle valve 16, the ejector-type mixer 12, and the seawater cooling condenser 13 are provided.
Has been deleted.

In such a configuration, the same operation as in the thirteenth embodiment is performed, but differs in the following points.

That is, the high-concentration mixed-medium vapor discharged from the mixed-medium turbine 10 of the mixed-medium power generation system 50 is guided to the condenser 45, and the medium-concentration mixed-medium liquid stored in the medium-concentration mixed-medium storage tank 114 is removed. It exchanges heat with the one pressurized by the pressurizing pump 14 to recover the liquid, and the high concentration mixed medium liquid storage tank 1
12 is conveyed. The high-concentration mixed medium liquid guided to the heat exchange section of the condenser 45 performs heat exchange and is heated, and is guided to the heat exchange section of the heat exchanger 42 of the intermediate heat circuit 44, where it is heated and then subjected to high-pressure separation. It is led to 9.

According to the present embodiment, in addition to the same effects as in the thirteenth embodiment, a high-concentration mixed medium obtained by separating the low-concentration mixed medium liquid separated by the high-pressure separator 9 again by the medium-pressure separator 131 is obtained. The medium steam is guided to the middle stage of the mixed-medium turbine 10 to drive it, and the power is generated by the generator 11 which is coaxially coupled. Therefore, the heat energy generated in the nuclear reactor system 1 is more efficiently converted to electricity. Can be converted to

Sixteenth Embodiment (FIG. 17)
A) In the present embodiment, an ejector-type mixer is provided between the mixed-medium turbine and the condenser in the mixed-medium power generation system of the fifteenth embodiment, and a pipe from the high-pressure separator to the mixed-medium turbine is branched. A condenser and an expansion valve are provided, and the expansion valve and the ejector-type mixer are connected.

FIG. 17 is a system configuration diagram shown in this embodiment.

As shown in FIG. 17, in the present embodiment, the mixed medium power generation system 7o is different from the mixed medium power generation system 7n shown in FIG.
An ejector-type mixer 128 is provided between the condenser and the condenser 45, and a pipe from the high-pressure separator 9 to the mixing medium turbine 10 is branched to provide a condenser 126 and an expansion valve 127. . Then, the expansion valve 127 and the ejector-type mixer 128 are connected, and the medium-concentration mixed medium liquid from the medium-concentration mixed medium storage tank 114 is pressurized by the pressurizing pump 14 and led to the heat exchange section of the condenser 126. And the other end to the intermediate heat circuit 44
, And the other end is connected to the high-pressure separator 9.

In such a configuration, the same operation as in the fifteenth embodiment is performed, but differs in the following points.

That is, the high-concentration mixed medium vapor separated by the high-pressure separator 9 is branched and guided to the mixed medium turbine 10 and the condenser 126. The high-concentration mixed-medium vapor guided to the mixed-medium turbine 10 is driven to generate electric power by a coaxially-coupled generator 11, and the exhaust gas is guided to an ejector-type mixer 128. The high-concentration mixed-medium vapor branched to the condenser 126 is cooled by the medium-pressure mixed-medium liquid stored in the medium-concentration mixed-medium liquid storage tank 114 by being pressurized by the pressurizing pump 14, and is condensed. The refrigerant is guided to the expansion valve 127 to perform adiabatic expansion to become a refrigerant, and the ejector-type mixer 128
The high-concentration mixed-medium vapor in the exhaust gas of the mixed-medium turbine 10 is sucked, mixed and cooled, guided to the condenser 45, condensed, and condensed by the transport pump 125.
2 is transferred. Also, the medium concentration mixed medium liquid storage tank 114
The medium-concentration mixed medium liquid stored in the heat exchanger is pressurized by the pressurizing pump 14, guided to the heat exchange section of the condenser 126, and performs heat exchange to the heat exchange section of the heat exchanger 42 of the intermediate heat circuit 44. It is guided and heated and circulated through the high-pressure separator 9.

According to the present embodiment, in addition to the same effects as those of the fifteenth embodiment, the back pressure is reduced by sucking the exhaust gas of the mixed medium turbine 10 by the ejector, and at the same time, the refrigerant enters the exhaust chamber from the outside. By keeping the vapor pressure low by cooling to remove the heat, the efficiency of the mixed-medium turbine can be improved, thereby improving the power generation efficiency.

Seventeenth Embodiment (FIG. 18)
A) In this embodiment, the high-concentration mixed-medium vapor in the mixed-medium power generation system according to the sixteenth embodiment is branched and guided to a condenser, and the high-concentration mixed-medium vapor of the medium-pressure separator is separated into a middle stage of a mixed-medium turbine. Instead of leading to the condenser.

FIG. 18 is a system configuration diagram shown in this embodiment.

As shown in FIG. 18, in this embodiment, the mixed-medium power generation system 7p branches the high-concentration mixed-medium vapor of the high-pressure separator 9 of the mixed-medium power generation system 7o shown in FIG. And the high-concentration mixed medium vapor of the medium-pressure separator 131 is supplied to the mixed medium turbine 1.
The structure leading to the middle stage of the zero is stopped, and the structure is led to the condenser 126.

In such a configuration, the same operation as in the sixteenth embodiment is performed, but differs in the following points.

That is, the high-concentration mixed medium vapor separated by the high-pressure separator 9 is all used for driving the mixed-medium turbine 10, and the high-concentration mixed medium vapor separated by the medium-pressure separator 131 generates a refrigerant. It is used to cool the exhaust gas of the mixed media turbine 10.

According to the present embodiment, in addition to the same effects as in the sixteenth embodiment, all of the high-concentration mixed medium vapor separated by the high-pressure separator 9 is used for driving the mixed-medium turbine, and the medium-pressure separator 131 The efficiency of the mixed-medium turbine 10 can be improved by generating a refrigerant with the separated high-concentration mixed-medium vapor and using it to cool the exhaust of the mixed-medium turbine.

Eighteenth Embodiment (FIG. 19)
A) Instead of the integrated natural circulation BWR reactor system in the first to seventeenth embodiments, the core, heat exchanger, and circulation pump are integrated, and a circulation path is formed with the boron water pool via the upper and lower density locks. In this way, a PIUS PWR reactor system was installed in a boron water pool, operated under pressure, and in the event of an accident, formed a natural circulation path with the boron water pool via upper and lower density locks to remove heat and applied heat. Things.

FIG. 19 is a system configuration diagram shown in this embodiment.

As shown in FIG. 19, specifically, in this embodiment, the reactor system is a PIUS-type PWR reactor system 1A, and the mixed medium power generation system 7d and the concentration difference energy system 8 shown in FIG. Are connected. The deep underground transportation system 118, the heat supply center 107, and the cooling / heating demand facility 22 shown in FIG. 2 are also applied.

The PIUS type PWR reactor system 1A is
The core 52, the heat exchanger 57, the main circulation pump 56, the lower density lock 53, the upper density lock 60, the pressurizer 61, the reactor pool 55, and the like. The core 52, the heat exchanger 57, the downcomer 58, and the riser 59 are integrally formed, and are fluidly connected to the reactor pool 55 via the lower density lock 53 and the upper density lock 60. Boron is injected into the reactor pool 55.

The components other than the reactor system, such as the mixed medium system 7d, are denoted by the same reference numerals in FIG. 19 as in FIG. 6, and description thereof is omitted.

This embodiment is the same as the above-described sixth embodiment, except for the following points.

That is, the PIUS PWR reactor system 1
In A, during normal operation, the high pressure
The high-temperature hot water rises up the riser 59 and is led to the heat exchanger 57, is led to the heat exchange section by the main circulation pump 56, exchanges heat with the mixed medium, is cooled, and descends the downcomer 58,
It flows into the lower plenum 135 through a flow path around the core 52 and circulates through the opening of the core support plate 4 to the core 52.

When the mixed medium power generation system 7d loses the heat removal function, the main circulation pump 56 is stopped, and the cooling water from the core 52 to the riser 59 has a high density and the density is small. Since the temperature of the water is low and the density is large, the pressure balance of the lower density lock 53 is broken, and the pool water of the reactor pool 55 becomes lower density lock 53.
Through the lower plenum 135 and into the core 52 through the opening of the core support plate 4. The pool water in the reactor pool 55 absorbs neutrons when flowing into the core due to the boron being injected, and shuts down the reactor without the help of control rods. In addition, since the pool water temperature is low, the decay heat of the reactor core 52 is recovered and rises, and a natural circulation reactor that flows out from the upper density lock 60 to the reactor pool 55 is configured.

According to this embodiment, substantially the same effects as those of the above embodiments can be obtained.

Nineteenth Embodiment (FIG. 20)
A) A PIUS BWR reactor system is applied in place of the PIUS PWR reactor system in the eighteenth embodiment. In this reactor system, the heat exchanger and the fluid valve are integrated, installed in the boron water pool so as to form a circulation path with the boron water pool via upper and lower density locks, and operated by boiling in the core In the event of an accident, a natural circulation path is formed with the boron water pool via the fluid valve and the upper and lower density locks to remove heat.

FIG. 20 is a system configuration diagram shown in this embodiment.

As shown in FIG. 20, the PIUS-type BWR reactor system 1B in this embodiment is specifically
It comprises a core 63, a heat exchanger 74, a fluid valve 64, a lower density lock 65, an upper density lock 72, a control rod drive mechanism 67, and boron water 71. Core 63, heat exchanger 7
4, the downcomer 68 and the riser 69 are integrally formed, and the lower density lock 65 and the upper density lock 7
2 and is fluidly coupled to the boron water 71.

Since the configuration other than the reactor system is the same as that of the eighteenth embodiment, the same reference numerals as in FIG. 19 denote the same parts in FIG. 20, and a description thereof will be omitted.

In the present embodiment to which such a PIUS BWR reactor system 1B is applied, during normal operation, high temperature / high pressure steam boiling in the reactor core 63 is supplied to the riser 6
9 and is guided to the heat exchanger 74, exchanges heat with the mixed medium, is cooled and condensed, and descends the downcomer 68,
The core-generated heat is recovered by the natural circulation force flowing into the lower plenum 135 and circulating through the opening of the core support plate 4 to the core 63. Fluid force descending downcomer 68 (F
IVS) Drive the water pump 70 to close the fluid valve 64 to reinforce the function of the lower density lock 65.

When the mixed medium power generation system loses the heat removal function, the water pump by the fluid force descending the downcomer 68 does not work, the fluid valve 64 is opened, and the cooling water from the core 52 to the riser 59 has a high temperature. Therefore, the density of the boron water 71 is low due to the low temperature, and the density is high due to the low temperature. Therefore, the pressure balance of the lower density lock 65 is broken, and the boron water 71 flows into the lower plenum 135 through the lower density lock 65 to support the core. It flows into the core 63 through the opening of the plate 4. When the boron water 71 flows into the reactor core, it absorbs neutrons and shuts down the reactor without the help of control rods.
Since the water temperature of the boron water 71 is low, a natural circulation furnace is configured in which the decay heat of the reactor core 63 is recovered and rises, and flows out of the upper density lock 72 into the boron water 71.

In this embodiment, the eighteenth
An effect similar to that of the embodiment is expected.

Twentieth Embodiment (FIG. 21)
A) In this embodiment, a steam-cooled reactor system is applied as a reactor system. That is, in this reactor system, the reactor core, the steam inlet pipe / inlet structure, and the steam outlet pipe / outlet structure are integrated, and a boron water pool is formed by forming a circulation path with the boron water pool via upper and lower density locks. It is installed inside the reactor and operated by cooling the core with steam, and in the event of an accident, heat is removed by forming a natural water circuit with the boron water pool via a fluid valve and upper and lower density locks.

FIG. 21 is a diagram showing a system configuration according to the present embodiment.

As shown in FIG. 21, the steam-cooled reactor system 1C in the present embodiment is, specifically, a reactor core 76, a control rod guide pipe 78, a shroud 108, a steam outlet pipe 82, a steam inlet pipe 83, It comprises a lower density lock 77, an upper density lock 79, a control rod drive mechanism 80, a reactor pool 134 and the like. The reactor core 76, the steam outlet pipe 82, the steam inlet pipe 83, the shroud 108, and the like are integrally formed, and are fluidly connected to the reactor pool 134 via the lower density lock 77 and the upper density lock 79.

In the present embodiment, a mixed medium system 7i and an intermediate heat circuit 44 which are substantially the same as those of the tenth embodiment are applied. In the intermediate heat circuit 44, a steam turbine 84, a generator 85, An exchanger 86 and a circulation pump 87 are provided. In FIG. 21, the same parts as those in the tenth embodiment are denoted by the same reference numerals as in FIG.

The steam-cooled reactor system 1 of the present embodiment
C, during normal operation, the steam flowing from the steam inlet pipe 83 passes through the peripheral flow path of the core 76 and the lower plenum 13.
5 flows into the core 76 through the opening of the core support plate 4, and is cooled by steam. Steam is the control rod guide tube 7
8, is guided to a steam outlet pipe 82, and subsequently guided to and driven by a steam turbine 84, generates electric power by a coaxially-connected generator 85, and the steam discharged from the steam turbine 84 is converted into heat. The mixture is guided to the exchanger 86, exchanges heat with the mixed medium, is cooled, pressurized by the circulation pump 87, and circulates to the steam inlet pipe 83. Operate while maintaining the steam pressure that maximizes the output.

When the heat removal function of the mixed-medium power generation system is lost, a chain reaction is lost because the steam pressure changes from the operating pressure, and the reactor is shut down. The pressure balance of the lower density lock 77 is lost, and pool water of the reactor pool 134 flows into the reactor core 76 to remove decay heat by natural circulation. Since the chain reaction may start when the pool water enters the reactor core 7, a function such as absorbing neutrons is provided by injecting boron into the pool water.

In this embodiment as well, the first
The same effects as in the ninth and twentieth embodiments are expected.

Twenty-first Embodiment (FIG. 22)
A) In this embodiment, a fluidized bed reactor system is applied. That is, this reactor system is composed of a particle fuel core,
The primary system pump, primary system circulation structure, and heat exchanger are integrated, and the core is constructed by levitation of the particulate fuel with the primary system fluid, and at the same time, the core is cooled and heat recovery is performed. In this configuration, the pump stops, the floating fuel drops, and each chain reaction stops.

FIG. 22 is a system configuration diagram shown in this embodiment.

As shown in FIG. 22, the fluidized bed reactor system 1D according to the present embodiment comprises a reactor core 89, a heat exchanger 100, a fluidized vessel 90, a fuel drop tube 91, a circulation channel 92, a graphite jacket 93, a hydraulic power plant. It comprises a valve 94, a primary pump 95, a primary water outlet 96, a primary water inlet 97, and the like.

Since the configuration other than the reactor system is the same as that of the nineteenth embodiment, the same reference numerals as in FIG. 20 denote the same parts in FIG. 22, and a description thereof will be omitted.

The fluidized bed reactor system 1D of the present embodiment
Then, during normal operation, water is circulated by the primary pump 95, the particulate fuel is levitated and guided to the fluidized vessel 90, and the core 89
And removes heat generated in the reactor core 89 with circulating water.
The circulating water is guided to the heat exchanger 100 and exchanges heat with the mixed medium to descend the circulation channel 92 to make the primary pump 95
Circulates.

When the power of the primary system pump 95 is lost, the circulating flow is lost and the buoyancy of the particulate fuel is also lost, so that the particulate fuel falls and fits in the fuel drop tube 91. Since the nuclear reaction is designed so that the nuclear reaction continues when the particle fuel floats and is distributed at a constant interval, the nuclear reaction stops when it is contained in the fuel drop tube 91.

In this embodiment as well, the nineteenth embodiment
The same effect as that of the twenty-first embodiment is expected.

[0250]

As described in detail above, according to the present invention, a nuclear reactor system capable of approaching a city, a high-density energy transportation technology at room temperature can be realized, and the above-mentioned problems can be solved. It works.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram showing a first embodiment of an urban proximity nuclear power plant according to the present invention.

FIG. 2 is a configuration diagram showing a portion connected to the system shown in FIG. 1;

FIG. 3 is a system configuration diagram showing a second embodiment of the urban proximity nuclear power plant according to the present invention.

FIG. 4 is a system configuration diagram showing a third embodiment of the close-to-city nuclear power plant according to the present invention.

FIG. 5 is a system configuration diagram showing a fourth embodiment of an urban proximity nuclear power plant according to the present invention.

FIG. 6 is a system configuration diagram showing a fifth embodiment of the urban proximity nuclear power plant according to the present invention.

FIG. 7 is a system configuration diagram showing a sixth embodiment of an urban proximity nuclear power plant according to the present invention.

FIG. 8 is a system configuration diagram showing a seventh embodiment of an urban proximity nuclear power plant according to the present invention.

FIG. 9 is a system configuration diagram showing an eighth embodiment of an urban proximity nuclear power plant according to the present invention.

FIG. 10 shows a ninth embodiment of the close-to-city nuclear power plant according to the present invention.
FIG. 1 is a system configuration diagram showing an embodiment.

FIG. 11 is a diagram showing a first example of the near-urban nuclear power plant according to the present invention.
FIG. 1 is a system configuration diagram showing an embodiment.

FIG. 12 is a diagram showing a first example of the near-city nuclear power plant according to the present invention.
FIG. 1 is a system configuration diagram showing one embodiment.

FIG. 13 is a diagram illustrating a first example of the near-urban nuclear power plant according to the present invention.
FIG. 2 is a system configuration diagram showing a second embodiment.

FIG. 14 is a diagram showing a first example of the near-city nuclear power plant according to the present invention.
FIG. 9 is a system configuration diagram showing a third embodiment.

FIG. 15 is a diagram illustrating a first example of the near-city nuclear power plant according to the present invention.
FIG. 11 is a system configuration diagram showing a fourth embodiment.

FIG. 16 is a diagram showing a first example of the near-city nuclear power plant according to the present invention.
The system configuration figure showing a 5th embodiment.

FIG. 17 is a diagram showing a first example of the near-urban nuclear power plant according to the present invention.
FIG. 14 is a system configuration diagram showing a sixth embodiment.

FIG. 18 is a diagram showing a first example of the close-to-city nuclear power plant according to the present invention.
The system configuration figure showing a 7th embodiment.

FIG. 19 is a diagram showing a first example of the near-city nuclear power plant according to the present invention.
The system configuration figure showing 8 embodiments.

FIG. 20 is a diagram showing a first example of a suburban nuclear power plant according to the present invention.
The system configuration figure showing a 9th embodiment.

FIG. 21 shows a second example of the close-to-city nuclear power plant according to the present invention.
FIG. 1 is a system configuration diagram showing an embodiment.

FIG. 22 shows a second example of the close-to-city nuclear power plant according to the present invention.
FIG. 1 is a system configuration diagram showing one embodiment.

[Explanation of symbols]

1a Reactor pressure vessel 1b Light water 1A PIUS PWR reactor system 1B PIUS BWR reactor system 1C Steam cooled reactor system 1D Fluid bed reactor system 2 Control rod guide tube 3 Fuel assembly 4 Core support plate 5 Heat Exchanger 6 Control rod drive 6a Control rod 7, 7a, 7b, 7c, 7d, 7e, 7f, 7g, 7
h, 7i, 7j, 7k, 7l, 7m, 7n, 7o, 7p
Mixed-medium power generation system 8 Concentration difference energy production system 9 High-pressure separator 10 Mixed-medium turbine 11 Generator 12 Mixer 13 Condenser 14 Pressure pump 15 Heat exchanger 16 Throttle valve 16a Connection pipe 17 Medium-pressure separator 18 Condensate Apparatus 19 Pressurizing pump 19a Piping 20 Refrigerant production system 21 Ice production system 22 Expansion valve 23 Condenser 24 Throttle valve 25 Ejector type mixer 26 Condenser 27 Transport pump 28 Supercooler 29 Ice storage tank 30 Circulation pump 31 Ice Slurry transport pump 32 Expansion valve 34 Heat exchanger 35 Mixed medium power generation system 36 Pressure reducing valve 37 Medium pressure separator 40 Condenser 41 Expansion valve 42 Heat exchanger 43 Circulation pump 44 Intermediate heat circuit 45 Condenser 52 Core 53 Lower density Lock 55 Reactor pool 56 Main circulation pump 57 Heat exchanger 58 Downcomer 5 Riser 60 Upper density lock 61 Pressurizer 63 Core 64 Fluid valve 65 Lower density lock 67 Control rod drive mechanism 68 Downcomer 69 Riser 70 Fluid power (FIVS) water pump 71 Boron water 72 Upper density lock 74 Heat exchanger 76 Core 77 Lower density Lock 78 Control rod guide tube 79 Upper density lock 80 Control rod drive mechanism 82 Steam outlet pipe 83 Steam inlet pipe 84 Steam turbine 85 Generator 86 Heat exchanger 87 Circulation pump 89 Core 90 Fluid container 91 Fuel drop tube 92 Circulation channel 93 Graphite Jacket 94 Hydraulic valve 95 Primary pump 96 Primary water outlet 97 Primary water inlet 100 Heat exchanger 103 Deep seawater 104 Integrated natural circulation BWR reactor system 105 Pump 106 Cooling tower 107 Heat supply center 108 Shula C 109 Shroud support 109a, 110a Opening 110 Partition wall 111 Heat exchanger 112 High concentration mixed medium liquid storage tank 113 Low concentration mixed medium storage tank 114 Medium concentration mixed medium storage tank 115 High concentration mixed medium transport pump 116 Low concentration mixed medium transport Pump 117 Medium-concentration mixed-medium transfer pump 118 Deep underground transfer system 118a Transfer pipe 119 Refrigerant generation system 120 Expansion valve 121 Ejector-type mixer 122 Throttle valve 123 Recoverer 124, 125 Transfer pump 126 Recoverer 127 Expansion valve 128 Ejector Type mixer 130 Pressure reducing valve 131 Medium pressure separator 132 Mixed media power generation system 134 Reactor pool 135 Lower plenum 136 Mixed media steam piping 136a Branch pipe 137 Condenser 138 Expansion valve

Continued on the front page (72) Inventor Yutaka Takeuchi 2-1 Ukishima-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Inside the Toshiba Hamakawasaki Plant (72) Inventor Tatsuo Miyazawa 1-1-1, Shibaura, Minato-ku, Tokyo Co., Ltd. Toshiba head office

Claims (25)

[Claims] 1. A fuel assembly is installed in a reactor pressure vessel to form a reactor core in which coolant circulates naturally, and a control rod drive mechanism is installed in an upper part of the reactor pressure vessel; An integrated natural circulation BWR reactor system provided with a heat exchanger for exchanging heat between the mixed medium and the heat generated in the core in the upper part of the vessel, and a high-temperature mixed medium from the heat exchanger of the reactor system. Has a high pressure separator to introduce,
The high-concentration mixed medium vapor separated by the high-pressure separator drives the mixed-medium turbine to generate power, while the low-concentration mixed medium liquid separated by the high-pressure separator is subjected to heat exchange with another system medium by a heat exchanger. A mixed-medium power generation system that mixes with the high-concentration mixed-medium vapor that has been subjected to power generation after being subjected to exchange to make a liquid recondensed, and circulates through a heat exchanger of the nuclear reactor system; and a heat exchanger of the mixed-medium power generation system. A medium-concentration mixed medium is applied as another system medium to be heated by the intermediate-pressure separation medium. And a low-concentration mixed medium liquid, and a high-concentration energy transfer system for recovering heat and exchanging heat with the low-concentration mixed medium liquid to extract the energy to the outside. A refrigerant generation system that generates a refrigerant by adiabatically expanding a bodily fluid, wherein production of ice or generation of hot water is enabled using the refrigerant generated by the refrigerant generation system. . 2. The near-city nuclear power plant according to claim 1, wherein a water / ammonia mixed medium is used as a mixed medium used in the mixed-medium power generation system or the concentration difference energy production system. 3. The near-city nuclear power plant according to claim 1, wherein a high-concentration mixed-medium pipe, a medium-concentration mixed-medium pipe, or a low-concentration mixed-medium pipe is provided between the mixed-medium power generation system, the concentration difference energy production system, and the heat supply unit. A nuclear power plant close to the city, characterized in that these pipes have a storage function. 4. The near-city nuclear power plant according to claim 3, wherein the high-concentration mixed medium pipe, the medium-concentration mixed medium pipe or the low-concentration mixed medium pipe is a deep underground pipe. plant. 5. The near-city nuclear power plant according to claim 1, wherein deep cooling seawater is used for cooling the condensate of the mixed-medium power generation system. 6. The close-to-city nuclear power plant according to claim 1, wherein the exhaust gas at the outlet of the mixed-medium turbine of the mixed-medium power generation system is cooled by a refrigerant. 7. The near-urban nuclear power plant according to claim 1, wherein a heat exchanger is installed at an outlet of the mixed-medium turbine of the mixed-medium power generation system, and cooling is performed by flowing a refrigerant through a heat-exchange portion of the heat exchanger. A near-city nuclear power plant, wherein the pressure at the outlet of the mixed-medium turbine is reduced. 8. The near-urban nuclear power plant according to claim 1, wherein heat released by the condensate in the mixed-medium power generation system is recovered by a high-concentration mixed-medium liquid for producing a concentration-difference energy. A nuclear power plant located close to the city. 9. The close-to-urban nuclear power plant according to claim 8, further comprising a heat exchanger for cooling steam discharged from the mixed-medium turbine of the mixed-medium power generation system, and producing heat of the steam into a concentration difference energy. A near-urban nuclear power plant characterized by recovering with a medium-concentration mixed medium liquid for the purpose. 10. The pressure reducing valve and the intermediate pressure separator between the heat exchanger and the outlet of the low concentration mixed medium liquid separated by the high pressure separator of the mixed medium power generation system according to claim 9, A high concentration mixed medium vapor separated by a medium pressure separator is introduced into a middle stage of the mixed medium turbine. 11. The near-urban nuclear power plant according to claim 10, wherein the high-concentration mixed medium vapor separated by the medium-pressure separator of the mixed medium power generation system is guided to a newly installed heat exchanger, and heat exchange is performed by a condenser. The conducted medium-concentration mixed medium liquid is led to this heat exchanger for heat exchange, and the mixed medium pressurized by the pressure pump is also conducted for heat exchange, and mixed by adiabatic expansion with the newly installed expansion valve. Heat exchange is performed by the heat exchanger for cooling the steam discharged from the medium turbine and guided to the ejector-type mixer, and the medium-concentration mixed medium liquid that has been subjected to heat exchange with the high-concentration mixed medium vapor separated by the medium-pressure separator. A near-urban nuclear power plant, which is led to a medium-pressure separator of a concentration difference energy production system. 12. The intermediate heat circuit according to claim 1, wherein a circulating pump and a heat exchanger are provided between the reactor system and the mixed-medium power generation system instead of the concentration difference energy production system. The mixed medium heat-exchanged by the heat exchanger of the intermediate heat circuit is guided to the high-pressure separator, and the high-concentration mixed medium vapor separated by the high-pressure separator is branched and guided to the mixed medium turbine and the condenser. The reconstituted high-concentration mixed-medium liquid is transported to the high-concentration mixed-medium liquid storage tank for a long distance, and the low-concentration mixed-medium liquid separated by the high-pressure separator is subjected to heat exchange. The city is characterized in that the medium-concentration mixed medium liquid conveyed to the medium-concentration mixed medium liquid storage tank is branched into a medium to be conveyed and a medium to be guided to the throttle valve, and is guided to the inlet side of the pressure pump. Proximity nuclear power plant . 13. The near-urban nuclear power plant according to claim 12, wherein the steam discharged from the mixed-medium turbine of the mixed-medium power generation system is absorbed by a low-concentration mixed-medium liquid separated by a high-pressure separator by an ejector-type mixer, A near-urban nuclear power plant, wherein the condensate is cooled by using a medium-concentration mixed medium liquid conveyed from a medium-concentration mixed medium liquid storage tank and guided to the inlet side of a pressure pump. 14. A mixed-medium turbine exhaust system according to claim 13, wherein the high-concentration mixed-medium vapor separated by the high-pressure separator of the mixed-medium power generation system is branched and guided to a condenser. The vapor is led to the condenser, the condensate of the high-concentration mixed medium is transported to the high-concentration mixed-medium storage tank, and the heat exchange of the low-concentration mixed medium separated by the high-pressure separator is not branched. A nuclear power plant close to an urban area characterized by being transported to a low-concentration mixed medium storage tank over a long distance. 15. The near-urban nuclear power plant according to claim 14, wherein an ejector-type mixer is provided between the mixed-medium turbine and the condenser in the mixed-medium power generation system, and a branch pipe for high-concentration mixed-medium vapor of the high-pressure separator. A structure in which a condenser and a throttle valve are installed between the ejector-type mixers, and the newly installed condenser is cooled with a mixed medium pressurized by a pressure pump and led to the heat exchanger of the intermediate heat circuit. A nuclear power plant located close to an urban area. 16. The near-urban nuclear power plant according to claim 12, wherein a pressure reducing valve and a medium pressure separator are inserted between the outlet of the low concentration mixed medium liquid of the high pressure separator of the mixed medium power generation system and the heat exchanger, A near-city nuclear power plant, characterized in that the high-concentration mixed medium vapor separated by the medium pressure separator is guided to the middle stage of the mixed medium turbine. 17. The close-to-urban nuclear power plant according to claim 13, wherein a pressure reducing valve and a medium pressure separator are inserted between the heat exchanger on the outlet side of the low concentration mixed medium liquid of the high pressure separator of the mixed medium power generation system. And a high-concentration mixed medium vapor separated by the medium pressure separator is guided to a middle stage of the mixed medium turbine. 18. The close-to-urban nuclear power plant according to claim 17, wherein a medium-pressure separator is used instead of a condenser for branching and condensing the high-concentration mixed medium vapor separated by the high-pressure separator of the mixed-medium power generation system. A condensate condenser for recondensing the separated high-concentration mixed medium vapor, and the mixed medium liquid condensed by the condensate is guided to a high-concentration mixed medium liquid storage tank; plant. 19. The near-urban nuclear power plant according to claim 17, wherein the mixed-medium turbine exhaust is replaced with a condensate for branching and condensing the high-concentration mixed-medium vapor separated by the high-pressure separator of the mixed-medium power generation system. A near-urban nuclear power plant, which is equipped with a condensate for condensing liquid. 20. The near-urban nuclear power plant according to claim 19, wherein an ejector-type mixer is installed between the mixed-medium turbine of the mixed-medium power generation system and the condenser, and the high-concentration mixed-medium vapor of the high-pressure separator is provided. A condenser and a throttle valve are installed between the branch piping and the ejector type mixer.
A near-city nuclear power plant, characterized in that the newly installed condenser is cooled by a mixed medium pressurized by a pressurizing pump, and the mixed medium is led to a heat exchanger of an intermediate heat circuit. 21. The close-to-urban nuclear power plant according to claim 20, wherein the high-concentration mixed-medium vapor of the medium-pressure separator of the mixed-medium power generation system is connected to a condenser instead of being guided to the middle stage of the mixed-medium turbine. A nuclear power plant located close to the city. 22. The close-to-urban nuclear power plant according to any one of claims 1 to 21, wherein a core, a heat exchanger and a circulation pump are integrated with each other instead of the integrated natural circulation BWR reactor system, A near-city nuclear power plant, wherein a PWR reactor system of a type that is installed in a boron water pool so as to form a circulation path with the boron water pool via a lock and is operated under pressure is applied. 23. The close-to-urban nuclear power plant according to any one of claims 1 to 21, wherein a core, a heat exchanger and a fluid valve are integrated with each other in place of the integrated natural circulation BWR reactor system, A near-urban nuclear power plant characterized by applying a BWR reactor system of a type which is installed in a boron water pool so as to form a circulation path with a boron water pool via a lock and is operated by boiling with reactor water. . 24. The close-to-urban nuclear power plant according to any one of claims 1 to 21, wherein a core, a steam inlet pipe / inlet structure, and a steam outlet pipe / outlet structure are replaced with the integrated natural circulation BWR reactor system. A steam-cooled nuclear reactor system that is integrated and installed in the boron water pool so as to form a circulation path with the boron water pool via the vertical density lock and cools the core with steam to operate A nuclear power plant located close to the city. 25. The close-to-city nuclear power plant according to any one of claims 1 to 21, wherein the integrated natural circulation BWR reactor system is replaced with a particle fuel core, a primary pump, a primary circulation structure, and a heat exchanger. A nuclear power plant close to an urban area characterized by applying a fluidized bed reactor system in which a core is constructed by levitation of particulate fuel with a primary fluid and cooling of the core and heat recovery at the same time .