A method for planning the layout of a nuclear island plant, and a nuclear island plant

Abstract

The present invention discloses a layout planning method for a nuclear island plant, including: determining items to be arranged in the nuclear island plant and the layout requirements of each item; dividing the nuclear island plant into a plurality of sub-plants according to the layout requirements of each item; and determining the relative position of each sub-plant according to the interface relationship between each sub-plant. The present invention also discloses a nuclear island plant. The method of the present invention can provide systematic guidance planning for the overall layout of the nuclear island plant and the local layout of each internal plant, greatly improving the rationality and economy of the layout of the nuclear island plant, and is suitable for the layout of nuclear island plants of various types, especially nuclear fission type experimental or commercial nuclear facilities. The nuclear island plant of the present invention has a reasonable layout, small structural redundancy, high coordination of internal functional areas, convenient transportation and passage, small footprint of the radioactive protection area, and low construction investment.

Description

Technical Field

[0001] The invention belongs to the field of nuclear engineering, and in particular relates to a method for planning the layout of a nuclear island plant and a nuclear island plant. Background Art

[0002] Since the 1940s, many countries around the world have built nuclear facilities with different functions and categories. Currently, there are more than 450 commercial nuclear power plants in the world, and nuclear facilities with experimental functions are widely used in major countries around the world. These nuclear facilities are divided into two categories according to the different principles of nuclear reactions: heavy nuclear fission reactors (thermal neutron reactors, fast neutron reactors) and light nuclear fusion reactors. Among them, light nuclear fusion reactors are affected by physical principles and material limitations. Most of the nuclear facilities currently in service are experimental in nature, while heavy nuclear fission technology is relatively mature.

[0003] At present, commercial heavy nuclear fission reactors designed based on the fission principle can be divided into light water reactors, heavy water reactors, gas-cooled reactors, molten salt reactors and other reactor types according to their coolants. On this basis, according to the differences in reactor types, safety system solutions, etc., various reactor types have been derived, such as the AP series pressurized water reactors in the United States, the BN series sodium-cooled fast neutron reactors in Russia, the ACP series pressurized water reactors in China, the M310 / EPR pressurized water reactors in France, the boiling water reactors in Japan, the heavy water reactors in Canada, etc.

[0004] However, although the current nuclear engineering field, especially the design and construction technology of thermal neutron reactors, has been relatively mature, there are still some deficiencies in the layout planning of nuclear island buildings of various existing nuclear facilities:

[0005] (1) The layout of the factory is not reasonable, the coordination of the functional areas within the factory is not high, and transportation and traffic are inconvenient;

[0006] (2) There is a lack of overall consideration for radioactive protection, and the protection area occupies a large area and requires a large investment;

[0007] (3) The factory building structure design is overly redundant and not very economical. Summary of the invention

[0008] The technical problem to be solved by the present invention is to provide a method for nuclear island plant layout planning and a nuclear island plant arranged by adopting the method for nuclear island plant layout planning, the method can provide systematic guidance planning for the nuclear island plant from the overall layout to the local layout of each internal plant, greatly improving the rationality and economy of the nuclear island plant layout, the nuclear island plant arranged by this method has a reasonable layout, small structural redundancy, high coordination of internal functional areas, convenient transportation and passage, small footprint of the radioactive protection area, and low construction investment.

[0009] According to one aspect of the present invention, the present invention provides a method for planning the layout of a nuclear island plant, and its technical solution is as follows:

[0010] A method for nuclear island plant layout planning, comprising:

[0011] S1, determine the items to be arranged in the nuclear island building and the layout requirements of each item;

[0012] S2, divide the nuclear island plant into multiple sub-plants according to the layout requirements of each item;

[0013] S3, determine the relative positions of each branch factory building based on the interface relationship between them.

[0014] Preferably, determining the layout requirements of each item in step S1 includes: determining the layout volume of each item and determining the safety level, earthquake resistance level, and radioactive control requirements of each item.

[0015] Preferably, the layout volume of each item is determined according to the size of each item and the space required for operation and maintenance; the safety level, seismic level, and radioactive control requirements of each item are determined according to the functional type of the system to which each item belongs.

[0016] Preferably, in step S2, the nuclear island plant is divided into a plurality of sub-plants, including:

[0017] S201, sorting the layout volumes of the items from large to small, and selecting the large items whose layout volumes are ranked first and whose total layout volumes account for more than 50%-80% of the total layout volume;

[0018] S202, according to the connection relationship between the system to which the large item belongs and the reactor main process system, determine the topological relationship between the systems in the nuclear island plant, record the system directly connected to the reactor main process system as the first-level system, and record the system indirectly connected to the reactor main process system through the first-level system as the second-level system;

[0019] S203, the reactor main process system is divided into a separate sub-plant building, which is called the reactor plant building, and the reactor plant building is arranged in the middle of the nuclear island plant building.

[0020] The remaining sub-buildings are divided according to the radioactive control requirements, layout volume, safety level, and seismic resistance level of each item in the first-level system and the second-level system, and are arranged around the reactor building.

[0021] Preferably, the step S203 divides the remaining sub-plants according to the radioactive control requirements, layout volumes, safety levels, and seismic resistance levels of the items in the first-level system and the second-level system, including:

[0022] S2031, based on the radioactive control requirements of the first-tier system and the second-tier system, the first-tier system is divided into a first supervisory area system and a first control area system, the second-tier system is divided into a second supervisory area system and a second control area system, the first supervisory area system and the second supervisory area system are set up as supervisory areas around the reactor building, and the first control area system and the second control area system are set up as control areas around the reactor building;

[0023] S2032. In the supervision area, a single system in the first supervision area system whose layout volume exceeds 10%-20% of the total layout volume of each item in the nuclear island plant is separately set up in a sub-plant building, which is recorded as the first type of supervision plant. A single system in the first supervision area system whose layout volume does not exceed 10%-20% of the total layout volume of each item in the nuclear island plant is set up in a sub-plant building according to the safety level and seismic level, which is recorded as the second type of supervision plant. A single system in the second supervision area system whose layout volume exceeds 10%-20% of the total layout volume of each item in the nuclear island plant is separately set up in a sub-plant building, which is recorded as the third type of supervision plant. A single system in the second supervision area system whose layout volume does not exceed 10%-20% of the total layout volume of each item in the nuclear island plant is combined and set up in the corresponding type of supervision plant according to the safety level and seismic level. , and / or, within the control area, a single system in the first control area system whose layout volume exceeds 10%-20% of the total layout volume of each item in the nuclear island building is separately set up in a sub-plant building, which is recorded as a first-class control building; a single system in the first control area system whose layout volume does not exceed 10%-20% of the total layout volume of each item in the nuclear island building is set up in a sub-plant building according to the safety level and seismic level, which is recorded as a second-class control building; a single system in the second control area system whose layout volume exceeds 10%-20% of the total layout volume of each item in the nuclear island building is separately set up in a sub-plant building, which is recorded as a third-class control building; a single system in the second control area system whose layout volume does not exceed 10%-20% of the total layout volume of each item in the nuclear island building is combined and set up in a second-class control building of the corresponding level according to the safety level and seismic level.

[0024] Preferably, the safety level is divided into a safety level and a non-safety level, and the earthquake resistance level is divided into an earthquake resistance level and a non-earthquake resistance level;

[0025] Within the scope of the second-class supervision plant, the first supervision area system and the second supervision area system of the safety level and earthquake resistance level are set in one branch plant, and the first supervision area system and the second supervision area system of the non-safety level and non-earthquake resistance level are set in another branch plant;

[0026] Within the scope of the second-class control building, the first control area system and the second control area system of the safety level and earthquake resistance level are set in one branch building, and the first control area system and the second control area system of the non-safety level and non-earthquake resistance level are set in another branch building.

[0027] Preferably, the determining the relative positions of the sub-factories according to the interface relationships between the sub-factories includes:

[0028] The sum of the unit length values ​​of the connecting pipelines between different branch factories is counted, and the positions between the branch factories are determined according to the size of the sum of the values, wherein the larger the sum of the values ​​of the connecting pipelines, the closer the distance between the branch factories corresponding to them.

[0029] Preferably, the control area is arranged on one side of the reactor building, and is divided into a fuel building, an auxiliary building, a nuclear waste building, and a personnel access building, wherein the fuel building and the auxiliary building are arranged close to the reactor building and are adjacent to each other, the nuclear waste building and the personnel access building are arranged on the periphery of the fuel building and the auxiliary building, and the nuclear waste building is adjacent to the auxiliary building, and the personnel access building is adjacent to the fuel building and the auxiliary building, respectively; the supervision area is arranged on the other side of the reactor building, opposite to the control area, and an electrical building is arranged in the supervision area.

[0030] Preferably, the method further comprises: S4, determining the scale of nuclear island plant.

[0031] Preferably, the scale of the nuclear island plant is determined by multiplying the layout volume of the internal systems of each sub-plant by a layout factor α; and the layout factor α is 2-20.

[0032] According to another aspect of the present invention, the present invention provides a nuclear island plant, and its technical solution is:

[0033] A nuclear island building comprises a reactor building, a control area, and a supervision area, wherein:

[0034] The reactor is located at the center of the nuclear island plant;

[0035] The control area is located on one side of the reactor building, and includes a fuel building, an auxiliary building, a nuclear waste building, and a passage building. The fuel building and the auxiliary building are located near the reactor building and are adjacent to each other. The nuclear waste building and the personnel passage building are located outside the fuel building and the auxiliary building, wherein the nuclear waste building is adjacent to the auxiliary building, and the personnel passage building is adjacent to the fuel building and the auxiliary building respectively.

[0036] The supervision area is arranged at the other side of the reactor building and is opposite to the control area, and an electrical building is arranged in the supervision area.

[0037] The method for planning the layout of nuclear island buildings of the present invention can provide systematic guidance planning for the nuclear island buildings from the overall layout to the local layout of each internal building, greatly improving the rationality and economy of the layout of nuclear island buildings. It is suitable for the layout of nuclear island buildings of various types, especially nuclear fission type experimental or commercial nuclear facilities, and has strong feasibility. Moreover, due to the reasonable layout, it can fundamentally improve the safety of nuclear facilities and enhance the public's acceptance of nuclear safety.

[0038] The nuclear island plant of the present invention has a reasonable layout, small structural redundancy, high coordination of internal functional areas, convenient transportation and passage, small footprint of the radioactive protection area, low construction cost, high economy, and can be applied to various types, especially nuclear fission type experimental or commercial nuclear facilities. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A flowchart of a method for planning the layout of a nuclear island plant in an embodiment of the present invention;

[0040] Figure 2 It is a schematic diagram of the structure of the nuclear island plant in an embodiment of the present invention.

[0041] In the figure: 1. Reactor building; 2. Fuel building; 3. Electrical building; 4. Auxiliary building; 5. Nuclear waste building; 6. Personnel access building. DETAILED DESCRIPTION

[0042] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the protection scope of the present invention.

[0043] In the description of the present invention, it should be noted that the directions or positional relationships indicated by “upper” and the like are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience and simplification of the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0044] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connect", "set", "install", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] Example 1

[0047] like Figure 1 As shown, this embodiment discloses a method for nuclear island plant layout planning, including the following steps S1-S4:

[0048] S1. Determine the items to be arranged in the nuclear island building and the layout requirements of each item.

[0049] Specifically, taking a nuclear facility with nuclear fission reaction as an example, its nuclear island building is mainly used to arrange system items directly related to the realization of nuclear fission, system items directly related to the realization of the three major safety functions of reactivity control / core residual heat extraction / radioactivity containment, and items related to electrical instrumentation and control in the above system items. In order to effectively control radioactive items, it is advisable to minimize the items arranged in the nuclear island building under the premise of reasonable feasibility. However, in actual operation, due to economic considerations, even if some items may not have direct significance for realizing the safety functions of nuclear facilities, they can be considered to be arranged in the nuclear island building during the design process of the nuclear island building of commercial nuclear facilities. By considering the above factors, the items to be arranged in the nuclear island building and the systems to which each item belongs are determined.

[0050] In this embodiment, the systems to which the items arranged in the nuclear island plant mainly belong mainly include:

[0051] ① Nuclear heat transfer system, which is mainly used to realize the reactivity control, core heat removal and radioactive material containment functions under the normal operating conditions of the reactor. Different systems are named according to the nuclear reaction principle and reactor type;

[0052] ② Loading and unloading system, mainly used to realize the storage, temporary storage, detection, transportation of new and spent fuel, core loading and unloading, etc.;

[0053] ③ Special safety facilities are mainly used to achieve the three major safety functions of reactivity control, core residual heat removal and radioactive containment under reactor accident conditions;

[0054] ④ Main and auxiliary systems, mainly used to realize functions such as working fluid purification, chemical reagent addition, working fluid replenishment, volume control, etc., to ensure the normal operation of nuclear heat conduction system, loading and unloading system, and dedicated safety facilities;

[0055] ⑤ Three waste systems, mainly used to realize the reception, treatment and storage of radioactive solid, liquid and gaseous wastes in the nuclear island plant;

[0056] ⑥Electrical instrumentation and control system, which is mainly used to provide necessary information collection and storage, network data transmission, data analysis and diagnosis, operation control and power allocation for various systems in nuclear facilities;

[0057] ⑦ Public systems mainly provide necessary equipment cooling water, chilled water, desalted water, ventilation cooling, air purification, instrument compressed air, public compressed air, hydrogen, nitrogen, helium, etc. for various systems in the nuclear island plant to ensure the normal operation of the above systems;

[0058] ⑧Other systems, such as circulating cooling water systems, domestic sewage treatment plants, thermal machine repair workshops, chlorine production plants, etc., which provide necessary support systems and structures for various process systems within nuclear facilities.

[0059] In some embodiments, determining the layout requirements of each item in each system in step S1 includes: determining the layout volume of each item and determining the safety level, seismic level, and radioactive control requirements of each item.

[0060] Specifically, the layout volume of each item is determined according to its size and the space required for operation and maintenance; the safety level, seismic resistance level, and radioactive control requirements of each item are determined according to the functional type of the system to which each item belongs.

[0061] S2, divide the nuclear island building into multiple sub-buildings according to the layout requirements of each item.

[0062] Specifically, in step S2, the nuclear island plant is divided into a plurality of sub-plants, including:

[0063] S201, sorting the layout volumes of the items from large to small, and selecting the large items whose layout volumes are ranked first and whose total layout volumes account for more than 50%-80% of the total layout volume;

[0064] S202, according to the connection or connectivity relationship between the system to which the large item belongs and the reactor main process system (e.g., reactor coolant system), determine the topological relationship between the systems in the nuclear island building, and define the system hierarchy, record the system directly connected or connected to the reactor main process system as the first-level system, and record the system indirectly connected or connected to the reactor main process system through the first-level system as the second-level system;

[0065] S203, the main process system of the reactor is divided into a separate sub-building, recorded as the reactor building, and the reactor building is arranged in the middle of the nuclear island building. The remaining sub-buildings are divided according to the radioactive control requirements, layout volume, safety level, and seismic resistance level of each item in the first-level system and the second-level system, and the remaining sub-buildings are arranged around the reactor building.

[0066] In some embodiments, the remaining sub-plants are divided according to the radioactive control requirements, layout volumes, safety levels, and seismic resistance levels of the items in the first-level system and the second-level system in step S203, including:

[0067] S2031, according to the radioactive control requirements of the first-level system and the second-level system, the first-level system is divided into a first supervisory area system and a first control area system, the second-level system is divided into a second supervisory area system and a second control area system, the first supervisory area system and the second supervisory area system are arranged as supervisory areas around the reactor building, and the first control area system and the second control area system are arranged as control areas around the reactor building, that is, the nuclear island building can be divided into the reactor building, the supervisory area, and the control area;

[0068] S2032, in the supervision area, a single system in the first supervision area system whose layout volume exceeds 10%-20% (preferably 15%) of the total layout volume of each item in the nuclear island plant (the layout volume of a single system should not exceed 50% of the total layout volume of each item in the nuclear island plant) is separately set up in a sub-plant building, which is recorded as a first-class supervision plant; a single system in the first supervision area system whose layout volume does not exceed 10%-20% (preferably 15%) of the total layout volume of each item in the nuclear island plant is set up in a sub-plant building according to the safety level and seismic level, which is recorded as a second-class supervision plant; a single system in the second supervision area system whose layout volume exceeds 10%-20% (preferably 15%) of the total layout volume of each item in the nuclear island plant is separately set up in a sub-plant building, which is recorded as a third-class supervision plant; a single system in the second supervision area system whose layout volume does not exceed 10%-20% (preferably 15%) of the total layout volume of each item in the nuclear island plant is combined and set up in a second-class supervision plant building of the corresponding level according to the safety level and seismic level , and / or, in the control area, a single system in the first control area system whose layout volume exceeds 10%-20% (preferably 15%) of the total layout volume of each item in the nuclear island plant building (the layout volume of a single system should not exceed 50% of the total layout volume of the first supervision area system) is separately set up in a sub-plant building, which is recorded as a first-class control plant building; a single system in the first control area system whose layout volume does not exceed 10%-20% (preferably 15%) of the total layout volume of each item in the nuclear island plant building is set up in a sub-plant building according to the safety level and seismic level, which is recorded as a second-class control plant building; a single system in the second control area system whose layout volume exceeds 10%-20% (preferably 15%) of the total layout volume of each item in the nuclear island plant building is separately set up in a sub-plant building, which is recorded as a third-class control plant building; a single system in the second control area system whose layout volume does not exceed 10%-20% (preferably 15%) of the total layout volume of each item in the nuclear island plant building is combined and set up in a second-class control plant building of the corresponding level according to the safety level and seismic level.

[0069] Specifically, the safety level can be divided into safety level and non-safety level, and the earthquake resistance level can be divided into earthquake resistance level and non-earthquake resistance level; within the scope of the second-category supervision factory building, the first supervision area system and the second supervision area system of the safety level and the earthquake resistance level are set to a branch factory building, and the first supervision area system and the second supervision area system of the non-safety level and the earthquake resistance level are set to another branch factory building; within the scope of the second-category control factory building, the first control area system and the second control area system of the safety level and the earthquake resistance level are set to a branch factory building, and the first control area system and the second control area system of the non-safety level and the earthquake resistance level are set to another branch factory building.

[0070] S3, determine the relative positions of each branch factory building based on the interface relationship between them.

[0071] Specifically, during the nuclear fission reaction process, the various sub-buildings within the nuclear island plant assume different functions, and there are electrical or mechanical interfaces between the items in the internal systems of different sub-buildings. Only by rationally planning the relative positions of the various sub-buildings within the nuclear island plant can the functions of the major systems within the nuclear island plant be smoothly implemented while meeting the safety requirements of the nuclear island plant. In some embodiments, the relative position of each sub-building is determined according to the interface relationship between each sub-building, which may specifically include: arranging the reactor building in the middle or center of the nuclear island building, arranging the first-level system and the second-level system in the sub-buildings in the supervision area and the control area around the reactor building according to step S2, counting the sum of the unit length values ​​of the connecting pipelines (including process pipelines, cables, ventilation ducts, etc.) between each sub-building, and determining the position between each sub-building according to the sum of the unit length values ​​of the connecting pipelines between each sub-building, wherein the larger the sum of the values ​​of the connecting pipelines, the closer the distance between the corresponding sub-buildings, for example, sub-building A has a connection relationship with sub-buildings B and C, and the sum of the unit length values ​​of the connecting pipelines between A and B is greater than the sum of the unit length values ​​of the connecting pipelines between A and C, then A and B are arranged as close as possible.

[0072] In this embodiment, according to the above division method, the nuclear island plant can be divided into a reactor plant, a supervision area, and a control area. Figure 2 As shown:

[0073] The reactor building is arranged at the center of the nuclear island building, and preferably the heat transfer system is arranged in the reactor building;

[0074] The control area is arranged on one side of the reactor building, and is divided into a fuel building, an auxiliary building, a nuclear waste building, and a personnel access building. The fuel building and the auxiliary building are arranged near the reactor building and adjacent to each other. The ② loading and unloading system is arranged in the fuel building, and the ④ main and auxiliary systems, ⑦ public systems, and ⑧ other systems are arranged in the auxiliary building; the nuclear waste building and the personnel access building are arranged outside the fuel building and the auxiliary building, and the nuclear waste building is adjacent to the auxiliary building, and the personnel access building is adjacent to the fuel building and the auxiliary building respectively, and the ⑤ three waste systems are arranged in the nuclear waste building; the supervision area is arranged on the other side of the reactor building and opposite to the control area, and the electrical building is arranged in the supervision area, and the ⑥ electrical instrumentation and control system and ③ dedicated safety facilities are arranged in the electrical building. Of course, the ⑦ public system and ⑧ other systems can also be arranged in the fuel building, not limited to the auxiliary building, and can be adjusted according to actual conditions.

[0075] S4, determine the scale of the nuclear island plant in order to make an economic estimate and complete the detailed design of the interior of each subsequent sub-plant.

[0076] In this embodiment, the scale of the nuclear island plant is determined by multiplying the layout volume of the internal systems of each sub-plant by the layout factor α, and the layout factor α is preferably 2-20.

[0077] The method for planning the layout of the nuclear island plant in this embodiment is described in detail below, specifically as follows:

[0078] Assume that the items to be arranged in a nuclear island building are as shown in Table 1.

[0079] Table 1 Items to be arranged in a nuclear island plant

[0080]

[0081]

[0082] It can be seen from Table 1 that, in descending order of layout volume, the sum of the layout volumes of the fuel operating crane, low-voltage switchboard*10, and process drainage buffer tank or chemical buffer tank (hereinafter taking the process drainage flushing tank as an example) which are ranked at the top is greater than 80% of the total layout volume, that is, the fuel operating crane, the low-voltage switchboard*10, and the process drainage buffer tank or chemical buffer tank are the large items, among which, the system to which the fuel operating crane belongs is the reactor pool and spent fuel pool cooling and treatment system (RFT), the system to which the low-voltage switchboard*10 belongs is the low-voltage alternating current system (ERD), and the system to which the process drainage buffer tank belongs is the waste liquid treatment system (ZLT). According to the connection relationship between RFT, ERD, and ZLT and the reactor main process system, RFT belongs to the first layer. The second system, ERD and ZLT belong to the second-level system, among which: according to the requirements of radioactive control, RFT is located in the first control area system, and its layout volume is 1013, which exceeds 15% of the total layout volume of various items in the nuclear island building, then a separate branch building (fuel building) will be set up for RFT; according to the requirements of radioactive control, ERD belongs to the second supervision area system, and the layout volume of ERD is 370, which exceeds 15% of the total layout volume of various items in the nuclear island building, then a separate branch building (electrical building) will be set up for ERD, and ZLT belongs to the second control area system, and the layout volume of ZLT is 298, which exceeds 15% of the total layout volume of various items in the nuclear island building, then a separate branch building (auxiliary building) will be set up for ZLT.

[0083] In addition, since ZLT collects waste liquid from RFT, assuming that the value of the unit length of the connecting pipeline between the two is about 100, ERD supplies power to all systems in the nuclear island plant, assuming that the value of the unit length of the connecting pipeline (cable) between it and each system is about 30, that is, the value of the unit length of the connecting pipeline between ERD and RFT and ZLT is about 30, then RFT and ZLT should be arranged as close as possible.

[0084] The layout planning method of the nuclear island building of this embodiment can provide systematic guidance planning for the nuclear island building from the overall layout to the local layout of each internal building, greatly improving the rationality and economy of the layout of the nuclear island building. It is suitable for the layout of nuclear island buildings of various types, especially nuclear fission type experimental or commercial nuclear facilities, and has strong feasibility. Moreover, due to the reasonable layout, it can fundamentally improve the safety of nuclear facilities and enhance the public's acceptance of nuclear safety.

[0085] Example 2

[0086] like Figure 2 As shown, this embodiment discloses a nuclear island plant, which is arranged using the layout planning method described in Example 1, and includes a reactor plant, a control area, and a supervision area, wherein:

[0087] The reactor is located in the center of the nuclear island building;

[0088] The control area is located on one side of the reactor building, and includes a fuel building, an auxiliary building, a nuclear waste building, and a access building. The fuel building and the auxiliary building are located close to the reactor building and are adjacent to each other. The nuclear waste building and the personnel access building are located on the periphery of the fuel building and the auxiliary building, among which the nuclear waste building is adjacent to the auxiliary building, and the personnel access building is adjacent to the fuel building and the auxiliary building respectively; the supervision area is located on the other side of the reactor building and opposite to the control area, and an electrical building is set up in the supervision area.

[0089] Specifically, the reactor building is equipped with ① heat transfer system, the fuel building is equipped with ② loading and unloading system, the auxiliary building is equipped with ④ main and auxiliary systems, ⑦ public systems, and ⑧ other systems, the nuclear waste building is equipped with ⑤ three waste systems, and the electrical building is equipped with ⑥ electrical instrumentation and control system and ③ dedicated safety facilities. Of course, the fuel building can also be equipped with ⑦ public systems and ⑧ other systems, that is, ⑦ public systems and ⑧ other systems are not limited to being arranged in the auxiliary building, and can be adjusted according to actual conditions.

[0090] The nuclear island plant of the present invention has a reasonable layout, small structural redundancy, high coordination of internal functional areas, convenient transportation and passage, small footprint of the radioactive protection area, low construction cost, high economy, and can be applied to various types, especially nuclear fission type experimental or commercial nuclear facilities.

[0091] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A method for planning the layout of a nuclear island plant, characterized in that: include: S1, determine the items to be arranged in the nuclear island building and the layout requirements of each item; S2, according to the layout requirements of each item, the nuclear island plant is divided into multiple sub-plants, including: S201, sorting the layout volumes of the items from large to small, and selecting the large items whose layout volumes are ranked first and whose total layout volumes account for more than 80% of the total layout volume. S202, according to the connection relationship between the system to which the large item belongs and the reactor main process system, determine the topological relationship between the systems in the nuclear island plant, record the system directly connected to the reactor main process system as the first-level system, and record the system indirectly connected to the reactor main process system through the first-level system as the second-level system, S203, the reactor main process system is divided into a separate sub-building, which is recorded as the reactor building, and the reactor building is arranged in the middle of the nuclear island building. The remaining sub-buildings are divided according to the radioactive control requirements, layout volume, safety level, and seismic level of each item in the first-level system and the second-level system, and the remaining sub-buildings are arranged around the reactor building, wherein the division of the remaining sub-buildings according to the radioactive control requirements, layout volume, safety level, and seismic level of each item in the first-level system and the second-level system specifically includes: S2031, based on the radioactive control requirements of the first-tier system and the second-tier system, the first-tier system is divided into a first supervisory area system and a first control area system, and the second-tier system is divided into a second supervisory area system and a second control area system. The first supervisory area system and the second supervisory area system are set up as supervisory areas around the reactor building, and the first control area system and the second control area system are set up as control areas around the reactor building. S2032, within the supervision area, a single system in the first supervision area system whose layout volume exceeds 15% of the total layout volume of each item in the nuclear island plant is separately set up in a sub-plant building, which is recorded as a first-class supervision plant; a single system in the first supervision area system whose layout volume does not exceed 15% of the total layout volume of each item in the nuclear island plant is set up in a sub-plant building according to the safety level and seismic level, which is recorded as a second-class supervision plant; a single system in the second supervision area system whose layout volume exceeds 15% of the total layout volume of each item in the nuclear island plant is separately set up in a sub-plant building, which is recorded as a third-class supervision plant; a single system in the second supervision area system whose layout volume does not exceed 15% of the total layout volume of each item in the nuclear island plant is combined and set up in a second-class supervision plant building of the corresponding level according to the safety level and seismic level, and / or, In the control area, a single system in the first control area system whose layout volume exceeds 15% of the total layout volume of each item in the nuclear island plant shall be separately set up in a sub-plant building, which shall be recorded as the first type of control plant; a single system in the first control area system whose layout volume does not exceed 15% of the total layout volume of each item in the nuclear island plant shall be set up in a sub-plant building according to the safety level and seismic level, which shall be recorded as the second type of control plant; a single system in the second control area system whose layout volume exceeds 15% of the total layout volume of each item in the nuclear island plant shall be separately set up in a sub-plant building, which shall be recorded as the third type of control plant; a single system in the second control area system whose layout volume does not exceed 15% of the total layout volume of each item in the nuclear island plant shall be combined and set up in the second type of control plant of the corresponding level according to the safety level and seismic level; S3, determine the relative positions of each sub-factory building according to the interface relationship between them, including: Arrange the first-level system and the second-level system in the sub-buildings in the monitoring area and the control area around the reactor building according to step S2, count the sum of the values ​​of the unit lengths of the connecting pipelines between the sub-buildings, and determine the positions of the sub-buildings according to the sum of the values, wherein the larger the sum of the values ​​of the connecting pipelines, the closer the distance between the sub-buildings.

2. The method for nuclear island plant layout planning according to claim 1, characterized in that: Determining the layout requirements of each item in step S1 includes: determining the layout volume of each item and determining the safety level, earthquake resistance level, and radioactive control requirements of each item.

3. The method for nuclear island plant layout planning according to claim 2, characterized in that: Determine the layout volume of each item based on its size and the space required for operation and maintenance; The safety level, seismic resistance level, and radioactive control requirements of each item are determined according to the functional type of the system to which each item belongs.

4. The method for nuclear island plant layout planning according to claim 1, characterized in that: The safety level is divided into safety level and non-safety level, and the earthquake resistance level is divided into earthquake resistance level and non-earthquake resistance level; Within the scope of the second-class supervision plant, the first supervision area system and the second supervision area system of the safety level and earthquake resistance level are set in one branch plant, and the first supervision area system and the second supervision area system of the non-safety level and non-earthquake resistance level are set in another branch plant; Within the scope of the second-class control building, the first control area system and the second control area system of the safety level and earthquake resistance level are set in one branch building, and the first control area system and the second control area system of the non-safety level and non-earthquake resistance level are set in another branch building.

5. The method for nuclear island plant layout planning according to claim 1, characterized in that: The control area is arranged on one side of the reactor building and is divided into the fuel building, auxiliary building, nuclear waste building, and personnel passage building. The fuel plant and auxiliary plant are located close to the reactor building and adjacent to each other. The nuclear waste plant and personnel access plant are arranged outside the fuel plant and auxiliary plant, with the nuclear waste plant adjacent to the auxiliary plant, and the personnel access plant adjacent to the fuel plant and auxiliary plant respectively; The supervision area is arranged on the other side of the reactor building and opposite to the control area, and the electrical plant is arranged in the supervision area.

6. The method for planning the layout of a nuclear island plant according to any one of claims 1 to 5, characterized in that: Also includes: S4, determine the scale of nuclear island plant; The plant scale is determined by multiplying the layout volume of the internal systems of each sub-plant by the layout factor α, and the layout factor α is 2-20.

7. A nuclear island plant, characterized in that: Arranged by the method described in any one of claims 1 to 6.

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