CN115478721B - Nuclear island factory building structure is arranged to nuclear power plant list heap - Google Patents

Abstract

The invention discloses a nuclear island factory building structure with single-pile arrangement of a nuclear power plant, which comprises the following components: the reactor factory building, business turn over factory building, safe factory building, auxiliary factory building, fuel factory building, connection factory building, this reactor factory building is located central authorities, business turn over factory building, safe factory building, auxiliary factory building, fuel factory building and connection factory building are around the periphery at the reactor factory building and connect gradually, wholly be the rectangle and arrange, be equipped with spent fuel pond in this fuel factory building, load the well, prepare well and lifting hole, this load well bottom, prepare well bottom and lifting hole bottom all are equipped with the buffer layer that satisfies the 9m requirement of falling of spent fuel container, still be equipped with the transfer platform in the load well. The nuclear island factory building structure is arranged by a single reactor of the nuclear power plant, so that the design difficulty of equipment arrangement, factory building structure and the like is reduced, the purposes of optimizing construction period and saving construction cost can be achieved, and the anti-falling capacity and the running safety and stability of the spent fuel transfer container are ensured.

Description

Nuclear island building structure for single reactor layout of nuclear power plant

Technical Field

The present invention relates to the field of nuclear power plant building structures, and in particular to a nuclear island building structure for a nuclear power plant with a single reactor arrangement.

Background Art

The design results of the nuclear island building structure of a nuclear power plant play a key role in meeting functional requirements and future engineering construction. Million-kilowatt pressurized water reactor nuclear power plants are currently being widely designed and built as the mainstream reactor type in the world. Different types of pressurized water reactors have different layout structures of nuclear island buildings due to their different technical types.

The Hualong One HPR1000 project is a third-generation, million-kilowatt nuclear power technology with completely independent intellectual property rights, jointly developed by CGN and CNNC. The main equipment and configuration adopt a fusion technology solution, but there are certain differences between the two parties in the layout of the nuclear island plant.

As shown in Figure 1, the nuclear island of CGN Hualong One project includes reactor building (BRX), fuel building (BFX), safety building (BSX), auxiliary building (BNX), and waste treatment building (BWX). The layout of the nuclear island building of HPR1000 project is shown in Figure 1. Safety building BSX includes safety building A (BSA), safety building B (BSB) and safety building C (BSC). Safety buildings A, B and C are arranged around the reactor building together with the fuel building in a square layout. The radioactive waste treatment building (BWX) is arranged close to the nuclear auxiliary building.

As shown in Figure 2, the nuclear island of the CNNC Hualong One project includes the reactor building (RX), fuel building (FX), safety building (SL/SR), auxiliary building (NX), nuclear waste building (QX), electrical building (LX), personnel access building (AR), fire pump house (FR) and other supporting buildings. The layout of the nuclear island building is shown in Figure 2. The electrical building is located between the reactor building and the steam turbine building, and is connected to the left and right safety buildings on both sides. The safety building is divided into safety building A column (SL) and safety building B column (SR), and SL and SR are arranged on both sides of the reactor building.

Taking the HPR1000 currently under construction in China as an example, there are the following problems:

1. The project occupies a large area. At present, the nuclear island plant of the HPR1000 project occupies an area of about 16,000-18,500 square meters, which is larger than that of similar foreign units. The implementation requires a large amount of land acquisition and a lot of negative excavation work. At the same time, the large plant area leads to long transportation distances for corresponding pipelines, ventilation, bridges, etc., a large construction workload, and a lack of economic competitiveness;

2. The hoisting height of the spent fuel transport container in the fuel plant exceeds 9m, which exceeds the 9m anti-fall capacity of the container test. Only other temporary solutions can be used, which is extremely inconvenient for operation and maintenance.

Summary of the invention

The technical problem to be solved by the present invention is to provide a nuclear island building structure for a single-reactor arrangement of a nuclear power plant.

The technical solution adopted by the present invention to solve the technical problem is: construct a nuclear island building structure of a single-reactor nuclear power plant, including: a reactor building, an entrance and exit building, a safety building, an auxiliary building, a fuel building, and a connection building;

The reactor building is located in the center, and the access building, the safety building, the auxiliary building, the fuel building and the connection building surround the periphery of the reactor building and are connected in sequence, forming a square arrangement as a whole;

The fuel plant is provided with a spent fuel pool, a loading well, a preparation well and a lifting hole;

The bottom of the loading well, the bottom of the preparation well and the bottom of the lifting hole are all provided with a shock-absorbing layer that meets the requirement of a 9m drop of the spent fuel container, and a transfer platform is also provided in the loading well.

In some embodiments, the reactor building, the access building, the safety building, the auxiliary building, the fuel building and the connection building are arranged on the same raft foundation.

In some embodiments, the reactor building is a double-layer containment structure, and the reactor building includes an outer containment, an inner containment, and an internal structure.

In some embodiments, the outer containment shell is arranged at the outermost side of the top of the reactor building, the inner containment shell is connected to the outer containment shell through the internal structure, and there is a predetermined gap between the outer containment shell and the inner containment shell.

In some embodiments, the outer containment vessel is designed to withstand impact from large aircraft.

In some embodiments, a passive containment heat conduction system is provided in the reactor building.

In some embodiments, the reactor building is provided with an IRWST water pool, an IVR water pool, an ASP water pool, and a VVP/ARE pipeline;

The VVP/ARE pipelines are centrally arranged in the reactor building.

In some embodiments, the fuel plant is respectively arranged adjacent to the auxiliary plant and the connecting plant, and the fuel plant is also provided with a steam generator sewage discharge system, a nuclear sampling system, a containment annular space ventilation system, and ventilation system equipment and pipelines.

In some embodiments, the spent fuel pool, the loading well, the preparation well, and the lifting hole are arranged on the same straight line.

In some embodiments, the outer wall area of the spent fuel pool is provided with a structure to prevent large aircraft from hitting it.

In some embodiments, the safety factory building includes a first safety factory building and a second safety factory building; the first safety factory building and the second safety factory building are independent of each other;

The outer wall of the first safety building facing away from the entrance and exit building, the outer wall of the second safety building facing away from the reactor building and the outer wall of the auxiliary building facing away from the fuel building are on the same plane.

In some embodiments, the first safety plant is adjacent to the inlet and outlet plant, and the first safety plant is provided with main steam and main water supply pipelines, and the main steam and main water supply pipelines are centrally arranged in the first safety plant;

The second safety factory building is arranged adjacent to the auxiliary factory building.

In some embodiments, the first safety factory building and/or the second safety factory building are equipped with safety facilities and supporting electrical and instrumentation facilities and a main control room.

In some embodiments, the outer wall areas of the first safety factory building and the second safety factory building are both provided with structures to prevent collisions with large aircraft.

In some embodiments, the auxiliary plant is equipped with auxiliary systems and three waste treatment facilities for participating in the operation of the power plant;

The auxiliary system includes centralized sampling equipment and large storage tanks;

The three waste treatment facilities include desalination beds, filters, coolant treatment equipment, degassing equipment and nuclear island waste gas treatment equipment.

In some embodiments, sanitary entrance and exit areas are provided at the ±0.00m level and -4.90m level of the factory entrance and exit, and mechanical pipelines and HVAC units are provided above the ±0.00m level of the factory entrance and exit.

In some embodiments, the nuclear island building structure of the nuclear power plant with a single-reactor arrangement further includes a gantry building respectively arranged adjacent to the entrance and exit building and the connection building.

The implementation of the present invention has the following beneficial effects: the nuclear island building structure of the single-reactor arrangement of the nuclear power plant includes: a reactor building, an access building, a safety building, an auxiliary building, a fuel building, and a connecting building, wherein the reactor building is located in the center, and the access building, the safety building, the auxiliary building, the fuel building, and the connecting building surround the outer periphery of the reactor building and are connected in sequence, and are arranged in a rectangular shape as a whole; a spent fuel pool, a loading well, a preparation well, and a hoisting hole are provided in the fuel building, and a shock-absorbing layer that meets the 9m drop requirement of the spent fuel container is provided at the bottom of the loading well, the bottom of the preparation well, and the bottom of the hoisting hole, and a transfer platform is also provided in the loading well. The nuclear island building structure of the nuclear power plant with a single reactor layout adopts a new type of nuclear island building structure for a nuclear power plant with a single reactor layout to reduce the design difficulty of equipment layout and building structure, so as to achieve the purpose of optimizing construction period and saving construction cost. In addition, the bottom of the loading well, the bottom of the preparation well and the bottom of the lifting hole are all provided with a shock-absorbing layer that meets the 9m drop requirement of the spent fuel container, thus ensuring the anti-fall capability of the spent fuel transfer container and the safe and stable operation.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solution of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

Figure 1 is a schematic diagram of the layout of the nuclear island plant of the CGN Hualong One project;

Figure 2 is a schematic diagram of the layout of the nuclear island plant of the CNNC Hualong One project;

FIG3 is a schematic diagram of a nuclear island plant building structure of a nuclear power plant with a single reactor in some embodiments of the present invention;

FIG4 is a general schematic diagram of a nuclear island building structure of a nuclear power plant with a single reactor arrangement in some embodiments of the present invention.

DETAILED DESCRIPTION

In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third", etc. can explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

Please refer to Figures 3 and 4, which are the nuclear island building structures of a single-reactor nuclear power plant in some embodiments of the present invention, which include: a reactor building 1, an access building 2, a safety building 3, an auxiliary building 4, a fuel building 5, and a connecting building 6. The reactor building 1 is located in the center, and the access building 2, the safety building 3, the auxiliary building 4, the fuel building 5 and the connecting building 6 are surrounded by the periphery of the reactor building 1 and are connected in sequence, and the overall arrangement is rectangular.

Understandably, the nuclear island building structure of the single-reactor layout of the nuclear power plant compresses the nuclear island footprint through an innovative nuclear island building layout structure while meeting the process configuration and safety functions. The nuclear island building structure of the single-reactor layout of the nuclear power plant covers an area of about 12,000 square meters, which reduces the workload of on-site land acquisition and negative excavation, reduces the transportation distances of pipelines, ventilation, and bridges, improves economy, and reduces the design difficulty of equipment layout and building structure, so as to achieve the goals of optimizing construction period and saving construction costs.

In this embodiment, the fuel building 5 is provided with a spent fuel pool 54, a loading well 53, a preparation well 52 and a hoisting hole 51. The bottom of the loading well 53, the bottom of the preparation well 52 and the bottom of the hoisting hole 51 are all provided with a shock-absorbing layer that meets the requirement of a 9m drop of the spent fuel container, and a transfer platform is also provided in the loading well 53. It can be understood that the fuel building 5 is mainly used for the equipment arrangement and operation of the fuel loading and unloading, transportation and storage system. In the fuel building 5 of the nuclear power plant, during the operation of transferring the spent fuel container to the loading well 53 or the preparation well 52, if the spent fuel container falls, a huge impact will be formed on the loading well 53 or the preparation well 52, causing the fuel building 5 to vibrate, which will not only have a very adverse impact on the equipment placed on the fuel building 5, but also affect the stability of the surrounding walls and other structures. The shock-absorbing layer can reduce the impact force of falling and avoid causing strong vibrations, thereby effectively reducing the impact on the main structure of the fuel plant 5 and surrounding equipment, and ensuring the reliable and stable operation of the fuel plant 5. The transfer platform is used as the transfer placement point for the spent fuel container.

Furthermore, the spent fuel pool 54, the loading well 53, the preparation well 52, and the hoisting hole 51 are arranged on the same straight line. The space utilization rate of the fuel plant 5 can be fully and effectively utilized, and it is more conducive to the operation of the spent fuel container. Among them, the outer wall area of the spent fuel pool 54 can also be provided with a structure to prevent large aircraft from hitting, thereby ensuring the safety of the spent fuel pool 54.

The fuel building 5 is respectively arranged adjacent to the auxiliary building 4 and the connecting building 6. In some embodiments, the fuel building 5 may also be provided with a steam generator blowdown system, a nuclear sampling system, a containment annular space ventilation system, and ventilation system equipment and pipelines. It can be understood that the steam generator blowdown system is used to discharge the sewage of the fuel building 5 and purify the sewage to ensure that the content of the relevant corrosion products and soluble impurities is within its water chemical index. The steam generator can also be emptied when the reactor is shut down or the pressure is insufficient. The nuclear sampling system can be an important means to achieve water chemical monitoring. During the normal operation of the nuclear power plant, accidents and post-accident conditions, representative liquid, gas and other samples are collected from various process systems for chemical analysis and radiochemical analysis, monitoring the core activity, monitoring the integrity of the fuel assembly, evaluating the characteristics of the ion exchanger and the filter, monitoring the chemical indexes of each process system and monitoring the leakage of radioactive substances, and proposing countermeasures based on the analysis results. The containment annular space ventilation system can keep the annular space between the double containment shells in a negative pressure state under accident conditions, collect and contain the radioactive substances leaking from the inner containment shell, and filter and discharge them through high-efficiency particle filters and iodine filters, thereby effectively controlling the radioactive release to the environment in accidents and further alleviating the impact of radioactive substances on the environment and the public. The ventilation system equipment and pipelines can discharge the polluted air in the fuel plant 5 directly or after purification to the outside, and then replenish fresh air to keep the indoor air environment in compliance with the requirements of hygiene standards.

Preferably, the reactor building 1, the access building 2, the safety building 3, the auxiliary building 4, the fuel building 5 and the connecting building 6 are arranged on the same raft foundation. It can be understood that the reactor building 1, the access building 2, the safety building 3, the auxiliary building 4, the fuel building 5 and the connecting building 6 share a large reinforced concrete bottom plate, which can make the foundation of the main building of the nuclear island have good integrity and high bending strength, can make full use of the foundation load, adjust the uneven load of the upper structure and the uneven settlement of the foundation, which is beneficial to improve the overall seismic performance of the building, reduce the settlement displacement difference between different buildings in the nuclear island, and reduce the amount of civil engineering.

Among them, the reactor building 1 is a double-layer containment structure, the reactor building 1 includes an outer containment 11, an inner containment 12 and an internal structure 13, the outer containment 11 is arranged at the outermost side of the top of the reactor building 1, the inner containment 12 is connected to the outer containment 11 through the internal structure 13, and there is a predetermined gap between the outer containment 11 and the inner containment 12. It can be understood that a large amount of radioactive substances will be released when an accident occurs in the nuclear power plant reactor. The containment can be used as a nuclear safety barrier to prevent the spread of radioactive substances and pollute the surrounding environment. At the same time, it is often used as the enclosure structure of the reactor building 1 to protect the reactor equipment system from adverse external influences. Further, the inner diameter of the inner containment 12 can be preferably 45.6m, the wall thickness can be 1.3m, and some local areas are thickened. The dome of the inner containment 12 is arc-shaped, and the inner structure 13 is cylindrical. The dome can be directly connected to the inner structure 13. The thickness of the dome is preferably 1.05m. The predetermined gap between the outer containment 11 and the inner containment 12 can be preferably 1.8m. The setting of the double-layer containment structure can effectively reduce the impact of natural disasters such as earthquakes and cyclones and accidents such as internal or external disasters on the reactor building 1. Further, the double-layer containment can be, but is not limited to, a steel containment, a reinforced concrete containment, or a prestressed concrete containment.

In some embodiments, the reactor building 1 may also be provided with a passive containment heat conduction system 14. It is understandable that once a mass-energy release accident occurs in the double-layer containment, the pressure and temperature of the containment will continue to rise, and exceed the set value of the double-layer containment, resulting in damage to the double-layer containment, and a large amount of radioactive substances are released into the environment, causing severe environmental consequences. The passive containment heat conduction system 14 can ensure that the double-layer containment can still be effectively cooled when a serious reactor meltdown occurs in the reactor building 1 and the power is off, and prevent the double-layer containment from being overheated or overpressured.

Furthermore, the reactor building 1 may also be provided with a spray system, which can be used to condense a large amount of steam released during an accident, absorb the most harmful fission gas during a radioactive iodine accident, and flush the radioactive dust in the shell, further improving the safety and operational stability of the reactor building 1.

In this embodiment, the reactor building 1 is also provided with an IRWST pool, an IVR pool, an ASP pool, and a VVP/ARE pipeline. It can be understood that the IRWST pool is located in the reactor building 1. It is under the same operating condition requirements as the double containment. It will not produce passive operating condition deterioration within 24 hours after the internal event occurs. It will recirculate and switch between systems under severe accidents, and provide guarantee for water supply under external hazards. The IVR pool retains the molten material in the pressure vessel to ensure the integrity of the pressure vessel and prevent certain off-pile phenomena that may endanger the integrity of the double containment. The ASP pool is used for accident response of the reactor building 1 to prevent damage to the double containment under accidents. Preferably, the VVP/ARE pipeline is arranged in a centralized manner in the reactor building 1, which can ensure the purity of the gas in the reactor building 1 and the continuous supply of gas, while ensuring the stability of the gas pressure and improving the utilization rate of the gas.

In this embodiment, the safety plant 3 includes a first safety plant 31 and a second safety plant 32; the first safety plant 31 and the second safety plant 32 are independent of each other. The outer walls of the first safety plant 31 and the second safety plant 32 are structures to resist the impact of large aircraft, which can ensure that the first safety plant 31 or the second safety plant 32 will not be lost in the event of an accident, thereby improving the stability and safety of the overall plant operation of the nuclear island. Furthermore, the first safety plant 31 is arranged adjacent to the inlet and outlet plant 2, and the first safety plant 31 is provided with a main steam and main water supply pipeline 311, which is centrally arranged in the first safety plant 31, and the second safety plant 32 is adjacent to the auxiliary plant 4. It can be understood that this centralized arrangement does not require the setting of an external wall concrete pier anti-throwing structure, which saves construction costs and facilitates on-site construction, reducing construction costs.

Further, the first safety plant 31 and/or the second safety plant 32 are provided with safety facilities and supporting electrical and instrumentation facilities and a main control room. It can be understood that the first safety plant 31 and the second safety plant 32 are connected to the electrical equipment of each plant on the nuclear island. The types of safety facilities and supporting electrical and instrumentation facilities and the main control room of the first safety plant 31 or the second safety plant 32 can be adjusted according to the needs of different plants to ensure the normal operation of the nuclear island plant.

Preferably, the outer wall areas of the first safety workshop 31 and the second safety workshop 32 are both provided with structures to prevent large aircraft collisions, thereby ensuring that the first safety workshop 31 and the second safety workshop 32 will not be lost after being hit.

In this embodiment, the auxiliary plant 4 is provided with auxiliary systems and three-waste treatment facilities for participating in the operation of the power plant. It can be understood that the auxiliary plant 4 is arranged close to the fuel plant 5, and the three-waste treatment facilities are arranged in the auxiliary plant 4, and no independent three-waste treatment plant is configured, which reduces the plant area and radioactive waste corridor, effectively improves the utilization rate of the nuclear island space, reduces the overall scale of the nuclear island, and reduces the amount of civil construction, thereby reducing the construction cost of the nuclear island plant structure of the single-reactor arrangement of the nuclear power plant.

Among them, the auxiliary system includes centralized sampling equipment and large storage tanks. The centralized sampling equipment is used to sample and analyze nuclear-related systems. According to the composition and content of radioactive elements in the sample, the radioactive dose level in each system during the operation of the nuclear power plant can be understood, and then the operation of the system can be judged to ensure the normal operation of the unit. The large storage tank is used to store chemical products for use in the nuclear island plant. Furthermore, the three waste treatment facilities include desalination beds, filters, coolant treatment equipment, degassing equipment and nuclear island waste gas treatment equipment. The desalination bed can be used to remove impurity ions in waste water that are easy to cause damage to equipment and devices, and can extend the service life of the equipment. The filter is used to filter impurities in waste water, the coolant treatment equipment is used to treat coolant in waste water, and the degassing equipment and nuclear island waste gas treatment equipment are used to treat and purify the discharged waste gas.

Preferably, the outer wall of the first safety building 31 facing away from the entrance and exit building 2, the outer wall of the second safety building 32 facing away from the reactor building 1 and the outer wall of the auxiliary building 4 facing away from the fuel building 5 are on the same plane. It can be understood that the right side of the nuclear island main building is flush and the lifting radius is small, which is conducive to the implementation of the open-top method for the main equipment and the lifting of the dome and large-volume structural modules. It can meet the construction needs of the nuclear island building structure construction of the nuclear power plant with a single reactor layout, and can include the lifting of the nuclear island main system equipment, nuclear island steel lining modules, domes, outer domes, and ring cranes. The small lifting radius also increases the efficiency of the nuclear island building structure construction of the nuclear power plant with a single reactor layout, and the lifting efficiency is also greatly improved.

In this embodiment, the entrance and exit building is provided with sanitary entrance and exit areas at 2±0.00m and -4.90m, and mechanical pipelines and HVAC units are provided above the entrance and exit building 2±0.00m. The layout of the building is fully utilized to set sanitary entrance and exit areas, mechanical pipelines and HVAC units, effectively improving the space utilization rate of the nuclear island, making the structural layout of the nuclear island building of the single-reactor arrangement of the nuclear power plant more compact.

Furthermore, a connecting passage connecting the first safety building 31 and the fuel building 5 is provided in the connecting building 6. It can be understood that the connecting passage can be used for the passage of equipment, pipelines, bridges, etc., and can also be used as an escape passage for personnel. By making full use of the space of the connecting building 6 to set up the connecting passage, the construction cost of the nuclear island building structure of the single-reactor arrangement of the nuclear power plant is further reduced.

In this embodiment, the nuclear island building structure of the single-reactor arrangement of the nuclear power plant further includes a gantry building 7 respectively arranged adjacent to the access building 2 and the connection building 6. It can be understood that the gantry building 7 is provided with a gantry, which is a steel structure for hoisting and transporting the core equipment of the nuclear island into the reactor building 1, and is a transportation channel for maintenance equipment during the operation of the reactor building 1, and its use cycle runs through the entire process of construction and operation of the nuclear power plant.

It can be understood that the beneficial effects of the nuclear island plant structure with a single reactor arrangement in the nuclear power plant are:

1. The nuclear island plant structure of the single-reactor arrangement of the nuclear power plant, under the premise of meeting the process configuration and safety functions, can achieve the purpose of optimizing the construction period and saving the construction cost by reducing the land acquisition and negative excavation workload on site and reducing the transportation distance of pipelines, ventilation, bridges, etc. through the innovative nuclear island plant layout structure;

2. The reactor building 1, the access building 2, the safety building 3, the auxiliary building 4, the fuel building 5 and the connection building 6 are arranged on the same raft foundation, which is beneficial to improving the overall seismic performance of the building and reducing the settlement displacement difference between different buildings in the nuclear island;

3. A shock-absorbing layer is set at the bottom of the fuel plant loading well 53 and the preparation well 52, a shock-absorbing layer is set at the bottom of the lifting hole 51, and a transfer platform is set inside the loading well 53, which can fully meet the 9m drop requirement of the spent fuel container from a structural point of view;

4. The main steam and main water supply pipelines 311 are centrally arranged through the first safety powerhouse 31, and there is no need to set up an external wall concrete pier anti-throwing structure, which saves construction costs and facilitates on-site construction;

5. The three waste treatment facilities are arranged in auxiliary plant 4, and no independent three waste treatment plant is configured, which reduces the plant area and radioactive waste corridor;

6. The right side of the main plant of the nuclear island is flat, and the lifting radius is small, which is conducive to the implementation of the open-top method for the main equipment and the lifting of the dome and large-volume structural modules.

It can be understood that the above embodiments only express the preferred implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the scope covered by the claims of the present invention.

Claims (12)

1. A nuclear power plant single-stack arrangement nuclear island plant structure, comprising: a reactor plant (1), an access plant (2), a safety plant (3), an auxiliary plant (4), a fuel plant (5) and a connecting plant (6);

The reactor plant (1) is positioned in the center, the inlet and outlet plant (2), the safety plant (3), the auxiliary plant (4), the fuel plant (5) and the connecting plant (6) are surrounded on the periphery of the reactor plant (1) and are sequentially connected, and the whole reactor plant is arranged in a rectangular shape;

a spent fuel pool (54), a loading well (53), a preparation well (52) and a lifting hole (51) are arranged in the fuel plant (5);

the bottom of the loading well (53), the bottom of the preparation well (52) and the bottom of the lifting hole (51) are respectively provided with a shock absorption layer meeting the falling requirement of the spent fuel container 9m, and a transfer platform is further arranged in the loading well (53);

IRWST water tanks, IVR water tanks, ASP water tanks and VVP/ARE pipelines ARE also arranged in the reactor factory building (1);

The VVP/ARE pipeline adopts a centralized arrangement mode in the reactor factory building (1);

The safety factory building (3) comprises a first safety factory building (31) and a second safety factory building (32); the first safety factory building (31) and the second safety factory building (32) are mutually independent;

The outer wall of the first safety factory building (31) at the side back to the in-out factory building (2), the outer wall of the second safety factory building (32) at the side back to the reactor factory building (1) and the outer wall of the auxiliary factory building (4) at the side back to the fuel factory building (5) are on the same plane;

The first safety factory building (31) is arranged adjacent to the in-out factory building (2), the first safety factory building (31) is provided with main steam and a main water supply pipeline (311), and the main steam and the main water supply pipeline (311) are arranged in the first safety factory building (31) in a concentrated mode;

The second safety factory building (32) is arranged adjacent to the auxiliary factory building (4);

The first safety factory building (31) and/or the second safety factory building (32) are/is provided with a safety facility and a matched electric and instrument control facility and a main control room;

the auxiliary factory building (4) is provided with an auxiliary system for participating in the operation of the power plant and three-waste treatment facilities;

the auxiliary system comprises centralized sampling equipment and a large storage tank;

The three-waste treatment facilities comprise a desalting bed, a filter, a coolant treatment device, a degassing device and a nuclear island waste gas treatment device.

2. The nuclear power plant single-pile arrangement nuclear island plant structure according to claim 1, characterized in that the reactor plant (1), the access plant (2), the safety plant (3), the auxiliary plant (4), the fuel plant (5) and the connection plant (6) are arranged on the same raft.

3. The nuclear power plant single-stack arrangement nuclear island plant structure according to claim 2, characterized in that the reactor plant (1) is a double containment structure, the reactor plant (1) comprising an outer containment (11), an inner containment (12) and an inner structure (13).

4. A nuclear power plant single-stack arrangement nuclear island plant structure according to claim 3, characterized in that the outer containment (11) is provided at the outermost side of the top end of the reactor plant (1), the inner containment (12) is connected with the outer containment (11) through the inner structure (13), and a predetermined gap exists between the outer containment (11) and the inner containment (12).

5. The nuclear power plant single-stack arrangement nuclear island plant structure of claim 4, wherein the outer containment (11) is designed to resist impacts from large aircraft.

6. A nuclear power plant single-stack arrangement nuclear island plant structure according to claim 3, characterized in that a passive containment heat conduction system (14) is provided in the reactor plant (1).

7. The nuclear power plant single-stack arrangement nuclear island plant structure according to claim 1, characterized in that the fuel plant (5) is arranged adjacent to the auxiliary plant (4) and the connection plant (6), respectively, the fuel plant (5) is further provided with a steam generator blowdown system, a nuclear sampling system and ventilation system equipment and pipes.

8. The nuclear power plant single-stack arrangement nuclear island plant structure according to claim 1, wherein the spent fuel pool (54), the loading well (53), the preparation well (52) and the lifting hole (51) are arranged on the same straight line.

9. The nuclear power plant single stack arrangement nuclear island plant structure of claim 8, wherein the spent fuel pool (54) outer wall area is provided with a large aircraft collision prevention structure.

10. The nuclear power plant single-stack arrangement nuclear island plant structure according to claim 1, wherein the outer wall areas of the first safety plant (31) and the second safety plant (32) are provided with structures for preventing large aircraft from striking.

11. The nuclear power plant single-stack arrangement nuclear island factory building structure according to claim 1, wherein sanitary entrance and exit areas are arranged on a layer (2) ± 0.00m and a layer (4.90 m) of the entrance and exit factory building, and mechanical pipelines and heating and ventilation units are arranged on a layer (2) ± 0.00m or more of the entrance and exit factory building.

12. The nuclear power plant single-stack arrangement nuclear island plant structure according to claim 1, further comprising portal frame plants (7) arranged adjacent to the access plant (2) and the connection plant (6), respectively.