Arrangement method for nuclear waste plant of nuclear power plant

Abstract

The invention discloses an arrangement method of a nuclear power plant nuclear waste plant, and relates to the technical field of nuclear power plants. The arrangement method for the nuclear waste plant of the nuclear power plant comprises the following steps: moving a wet waste treatment unit of a waste treatment center into the nuclear waste plant; a deep purification membrane treatment unit is arranged in the nuclear waste plant; devices and equipment of the nuclear waste plant are arranged into a plurality of underground layers and a plurality of ground layers in a layered, blocked and centralized manner. The layout of the nuclear waste plant of the nuclear power plant is improved, the radionuclide concentration emission does not exceed the related standard limit value, and the structural design requirement of the anti-seismic class I can be met. The arrangement design method for the nuclear waste plant of the nuclear power station can meet the requirement of an offshore plant site and can also meet the requirement of a nuclear island plant in a mud flat area, and the arrangement design method can be widely applied to a third-generation nuclear power unit.

Description

Technical Field

[0001] This invention relates to the field of nuclear power plant technology, and in particular to a method for arranging a nuclear waste facility in a nuclear power plant. Background Technology

[0002] The nuclear waste facility on the nuclear island is mainly used for the layout of nuclear waste system equipment and pipelines, as well as the storage, treatment, and loading / unloading of public radioactive waste. The process systems within the facility include liquid waste treatment systems and solid waste treatment systems, as well as dedicated ventilation systems and chilled water units.

[0003] Currently, some nuclear power plants are located in offshore sites and tidal flats. Due to the geological conditions of the nuclear island sites, there are certain problems with the discharge and layout: In order to minimize the impact on the site and the surrounding land environment, the concentration of radionuclides other than tritium and carbon-14 at the discharge outlet of the liquid effluent system should not exceed the limit. At the same time, due to the poor geological conditions of the tidal flats where the sites are located, the waste treatment center can only use pile foundations, and the longest piles can reach seventy or eighty meters, or even longer. However, the structural design of pile foundations exceeding a certain length cannot meet the seismic Class I structural design requirements of the process.

[0004] Therefore, it is essential to design a nuclear island building that can meet the requirements of both near-shore sites and tidal flat areas, so as to realize a layout design method for nuclear waste buildings of nuclear power plants that can be widely used in third-generation nuclear power units. Summary of the Invention

[0005] The main objective of this invention is to provide a method for arranging nuclear waste facilities in nuclear power plants, which aims to meet the needs of both near-shore sites and nuclear island facilities in tidal flat areas, so as to realize a layout design method for nuclear waste facilities in nuclear power plants that can be widely used in third-generation nuclear power units.

[0006] To achieve the above objectives, the present invention proposes a method for arranging a nuclear waste facility in a nuclear power plant, the method comprising the following steps: The wet waste treatment unit of the waste treatment center will be moved into the nuclear waste facility; A deep purification membrane treatment unit is installed in the nuclear waste facility; The facilities and equipment of the nuclear waste plant are arranged in layers, blocks, and in a centralized manner as several underground layers and several above-ground layers.

[0007] Optionally, the step of arranging the devices and equipment of the nuclear waste facility in layers, blocks, and centralized locations as several underground layers and several above-ground layers specifically includes: The nuclear waste facility is constructed from bottom to top as follows: two underground floors, one underground floor, one above-ground floor, two above-ground floors, three above-ground floors, four above-ground floors, five above-ground floors, and six above-ground floors. The wet waste treatment unit includes a waste resin intermediate tank, a waste resin receiving tank, a waste resin metering tank, a conical dryer, a hot oil unit, a condensation system, a high-efficiency filter, and a waste resin flushing tank. The waste resin receiving tank receives waste resin from the plant itself, and the waste resin intermediate tank receives waste resin from other plants. The intermediate tank is connected to the waste resin receiving tank, and a resin transfer pump is installed on the pipeline between them. The waste resin receiving tank is connected to the waste resin metering tank, and a waste resin transfer pump is installed on the pipeline between them. The waste resin metering tank is connected to the conical dryer, and a... The system includes a waste resin metering pump; the conical dryer is circulated with the hot oil unit and achieves drying by circulating hot oil; the conical dryer is connected to the condenser of the condensation system; the condenser is connected to the secondary condenser; the secondary condenser is connected to the high-efficiency filter; the high-efficiency filter is connected to the waste resin receiving tank, the waste resin flushing tank, and the waste resin metering tank; the waste resin flushing tank is connected to the waste resin receiving tank and is adapted to be connected to the plant drainage system; the condensate tank of the condensation system is connected to the conical dryer and is adapted to be connected to the plant drainage system. The deep purification membrane treatment unit includes a deep purification tank, a filter, an ultrafiltration system, an ultrafiltration box, a primary reverse osmosis system, a primary reverse osmosis water tank, a secondary reverse osmosis system, and a monitoring tank, all connected in sequence. The ultrafiltration system, the primary reverse osmosis system, and the secondary reverse osmosis system are all connected to a chemical cleaning platform. The monitoring tank is connected to the flushing ends of the primary and secondary reverse osmosis systems via flushing pipelines, each equipped with a reverse osmosis flushing pump. The monitoring tank is connected to a discharge pipeline, which is equipped with a waste liquid discharge pump. A feed pump is installed on the pipeline between the deep purification tank and the filter. The primary and secondary reverse osmosis systems are connected to a concentrate tank, which is connected to the chemical tank, with a concentrate pump installed on the pipeline between them. The ultrafiltration box is connected to the ultrafiltration system via a backwashing pipeline, which is equipped with an ultrafiltration backwashing pump. A primary reverse osmosis feed pump is installed between the ultrafiltration box and the primary reverse osmosis system. A secondary reverse osmosis feed pump is installed on the pipeline between the primary reverse osmosis water tank and the secondary reverse osmosis system.

[0008] Optionally, the second underground level is at least used to install a ground drainage receiving tank, a waste liquid monitoring tank, a chemical drainage receiving tank, a process drainage receiving tank, a chemical drainage pump, a concentrate pump, a reverse osmosis flushing pump, a waste liquid discharge pump, a process drainage pump, a ground drainage pump, a waste resin flushing tank, a flushing pump, and a gas tank.

[0009] Optionally, the underground floor is at least used to install acid and alkali pumps, concentrate tanks, condensate coolers, sampling rooms, resin intermediate tanks, flushing pumps, and waste resin transfer pumps.

[0010] Optionally, the ground floor is at least used to install an evaporation unit, a concentrate receiving tank, an in-tank drying unit, a concentrate pump and metering tank, a capping machine, a dosage monitoring device, a waste resin receiving tank, a waste resin transfer pump, a conical drying receiver, a dewatering pump, a shielded transfer vehicle, a waste resin transfer control room, and a transfer control room.

[0011] Optionally, the above-ground second floor shall be used to install at least the nuclear waste plant control room, conical dryer, waste resin metering pump, waste resin metering tank, condensate tank, condensate discharge pump, ultrafiltration permeate room, feed tank, deep purification feed pump, first-stage reverse osmosis feed pump, ultrafiltration backwash pump, first-stage reverse osmosis permeate tank, second-stage reverse osmosis feed pump, chemical reagent addition unit room, filter, desalination unit, concentrate tank, and concentrate pump room.

[0012] Optionally, the three floors above ground are used at least for installing instrumentation and control cabinets, a conical dryer maintenance hall, electrical equipment, chemical dosing units, ultrafiltration equipment, reverse osmosis, flocculant injection and sampling rooms.

[0013] Optionally, the above-ground four floors shall be used at least for installing a filter and desalination equipment maintenance and operation hall, a distillate cooler, a blower room, an iodine exhaust fan room, an exhaust fan room, a condenser, a high-efficiency filter, and a chilled water pump room.

[0014] Optionally, the above-ground five floors are at least used for installing a supply air room, an iodine exhaust air room, an exhaust air room, and a condenser room.

[0015] Optionally, the six floors above ground are used to install at least a chiller unit, a pressurized air supply room, an exhaust room, and a fresh air room.

[0016] The present invention has at least the following beneficial effects: According to the safety classification principle, the seismic requirements of waste treatment centers mainly stem from the presence of radioactive storage tanks within the plant, and the radioactive source of these tanks is the wet waste treatment unit within the plant. It can be understood that this invention, by moving the wet waste treatment unit of the waste treatment center into the nuclear waste plant, removes this portion of the high-radioactivity items originally located in the nuclear power plant waste treatment center. This allows the waste treatment center to meet only the length requirements of the pile foundation, thus solving the problem that pile foundation structures exceeding a certain length cannot meet the seismic Class I structural design requirements of the process.

[0017] This invention, by adding a deep purification membrane treatment unit, can ensure that all types of waste liquids meet the emission limit requirements after treatment, satisfy the radionuclide emission requirements of near-shore plant sites, and ensure that the concentration of radionuclides other than tritium and carbon-14 at the liquid effluent system discharge outlet does not exceed the limit, and that the radioactivity indicators at the discharge outlet meet the requirements of relevant standards.

[0018] This invention can meet the requirements of near-shore sites and adapt to the requirements of nuclear island buildings in tidal flat areas, realizing a layout design method for nuclear waste buildings of nuclear power plants that can be widely used in third-generation nuclear power units.

[0019] This invention adopts a layered, block-based, and centralized layout method. Under the premise of meeting specifications and functions, it makes reasonable use of resources, considers the rationality of rooms, uses zoning to distinguish functions, meets various constraints, and rationally divides the space. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a schematic flowchart of an embodiment of the layout method for nuclear waste storage facilities in a nuclear power plant according to the present invention. Figure 2 This is a schematic diagram of the structure of a wet waste treatment unit in one embodiment of the nuclear waste building layout method of the nuclear power plant of the present invention; Figure 3 This is a schematic diagram of the structure of a deep purification membrane treatment unit in one embodiment of the nuclear waste plant layout method of the present invention; Figure 4 This is a schematic diagram of the layout of the two underground floors in one embodiment of the nuclear waste disposal facility layout method of the nuclear power plant of the present invention; Figure 5 This is a schematic diagram of the layout of the basement floor in one embodiment of the nuclear waste disposal facility layout method of the nuclear power plant of the present invention; Figure 6 This is a schematic diagram of the layout of the ground floor in one embodiment of the nuclear waste building layout method of the nuclear power plant of the present invention; Figure 7 This is a schematic diagram of a two-story building layout in one embodiment of the nuclear waste disposal facility layout method of the nuclear power plant of the present invention; Figure 8 This is a schematic diagram of the layout of a three-story building above ground in one embodiment of the nuclear waste disposal facility layout method of the nuclear power plant of the present invention; Figure 9 This is a schematic diagram of the layout of a four-story building above ground in one embodiment of the nuclear waste disposal facility layout method of the nuclear power plant of the present invention; Figure 10 This is a schematic diagram of the layout of a five-story building above ground in one embodiment of the nuclear waste disposal facility layout method of the nuclear power plant of the present invention.

[0022] Explanation of icon numbers: 111. Waste resin intermediate tank; 112. Waste resin receiving tank; 113. Waste resin metering tank; 114. Conical dryer; 115. Hot oil unit; 116. High-efficiency filter; 117. Waste resin flushing tank; 118. Condenser; 119. Secondary condenser; 120. Condensate tank; 121. Steel drum; 210. Deep purification tank; 211. Filter; 212. Ultrafiltration system; 213. Ultrafiltration box; 214. First-stage reverse osmosis system; 215. First-stage reverse osmosis water tank; 216. Second-stage reverse osmosis system; 217. Monitoring tank; 218. Chemical cleaning platform; 219. Concentrate tank; 220. Chemical tank; 101. First corridor; 102. First staircase and transition room; 103. Second staircase and transition room; 104. First Pre-storage Tank Unit; 105. Basement Level 2 Lifting Room; 106. Pump Room 1 for Each Processing Unit; 107. Pump Room 2 for Each Processing Unit; 108. First Conical Drying Unit; 201. Second Corridor; 202. Third Staircase and Transition Room; 203. Fourth Staircase and Transition Room; 204. Second Pre-storage Tank Unit; 205. Basement Level 1 Lifting Room; 206. Valve Operation Room 1 for Each Processing Unit; 207. Valve Operation Room 2 for Each Processing Unit; 208. Second Conical Drying Unit; 301. Third Corridor; 302. Fifth Staircase and Transition Room; 303. Sixth Staircase and Transition Room; 304. Radioactive Pipe Room; 305. Basement Level 2 Lifting Room; 306. First Evaporation Unit; 307. In-Barrel Drying Unit; 308. Shielded Transfer Workshop; 309. Third Conical Drying Unit; 310. Waste Resin Transfer Unit; 311. First Vertical Shaft; 401. Fourth Corridor; 402. Seventh Staircase and Transition Room; 403. Eighth Staircase and Transition Room; 404. First Cabinet Room; 405. First Membrane Treatment Unit; 406. Second Evaporation Unit; 407. First Descending Channel Unit; 408. Fourth Conical Drying Unit; 409. Four-Story Above-Ground Hoisting Room; 410. Second Cabinet Room; 411. Second Vertical Shaft; 501. Fifth Corridor; 502. Ninth Staircase and Transition Room; 503. Tenth Staircase and Transition Room; 504. Third Cabinet Room; 505. Second Membrane Treatment Unit; 506. Flocculation Injection Unit; 507. Desalination Unit; 50 8. Second descending channel unit; 509. Valve operation room three for each processing unit; 510. Fifth conical drying unit; 511. Hoisting room on the second floor above ground; 512. Fourth cabinet room; 513. Third vertical shaft; 601. Sixth corridor; 602. Eleventh staircase and transition room; 603. Twelfth staircase and transition room; 604. First ventilation room; 605. First condensing unit; 606. First hall; 607. Sixth conical drying unit; 608. First chilled water unit; 609. Fourth vertical shaft; 701. Seventh corridor; 702. Thirteenth staircase and transition room; 703. Fourteenth staircase and transition room; 704. Second ventilation room; 705. Second condensing unit; 706. Second hall; 707. Corridor;708. Spare Room; 709. Second Chilled Water Unit; 710. Fifth Shaft.

[0023] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0025] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0026] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. The word "and / or" throughout the text means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. The technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0028] This invention proposes a method for arranging nuclear waste facilities in nuclear power plants, which is mainly an improvement made for the site being located in a tidal flat area and the emission requirement of 200 BQ / L specified in GB6249.

[0029] Reference Figures 1 to 3 In one embodiment of the present invention, the method for arranging the nuclear waste building of the nuclear power plant includes the following steps: S10. Move the wet waste treatment unit of the waste treatment center into the nuclear waste facility; S20. Install deep purification membrane treatment units in nuclear waste facilities; S30. The facilities and equipment of the nuclear waste plant shall be arranged in layers, blocks and centralized locations as several underground layers and several above-ground layers.

[0030] In step S10 above, the wet waste treatment unit mainly includes devices or equipment for treating wet waste. The wet waste unit equipment is relatively small and has high requirements for process principles; therefore, this part can be addressed by adding one span to the overall plant building.

[0031] Specifically, such as Figure 2 As shown, the wet waste treatment unit may include a waste resin intermediate tank 111, a waste resin receiving tank 112, a waste resin metering tank 113, a conical dryer 114, a hot oil unit 115, a condensation system, a high-efficiency filter 116, a waste resin flushing tank 117, etc. The waste resin receiving tank 112 is used to receive waste resin from the plant, the waste resin intermediate tank 111 is used to receive waste resin from other plants, the waste resin intermediate tank 111 is connected to the waste resin receiving tank 112 and a resin transfer pump can be installed on the pipeline between the two, the waste resin receiving tank 112 is connected to the waste resin metering tank 113 and a waste resin transfer pump can be installed on the pipeline between the two, and the waste resin metering tank 113 is connected to the conical dryer 114 and a waste resin metering pump can be installed on the pipeline between the two. The conical dryer 114 is circulated with the hot oil unit 115 and achieves drying by circulating hot oil. The conical dryer 114 is connected to the condenser 118 of the condensation system. The condenser 118 is connected to the secondary condenser 119. The secondary condenser 119 is connected to the high-efficiency filter 116. The high-efficiency filter 116 is also connected to the waste resin receiving tank 112, the waste resin flushing tank 117, and the waste resin metering tank 113. The waste resin flushing tank 117 is connected to the waste resin receiving tank 112 and is suitable for connection to the plant drainage system. The condensate tank 120 of the condensation system is connected to the conical dryer 114 and the plant drainage system. A steel drum 121 for receiving materials can be installed below the conical dryer 114.

[0032] In step S20 above, such as Figure 3As shown, the deep purification membrane treatment unit mainly includes a deep purification tank 210, a filter 211, an ultrafiltration system 212, an ultrafiltration box 213, a first-stage reverse osmosis system 214, a first-stage reverse osmosis water tank 215, a second-stage reverse osmosis system 216, and a monitoring tank 217, connected in sequence. The ultrafiltration system 212, the first-stage reverse osmosis system 214, and the second-stage reverse osmosis system 216 are all connected to a chemical cleaning platform 218. The monitoring tank 217 is connected to the flushing ends of the first-stage reverse osmosis system 214 and the second-stage reverse osmosis system 216 via flushing pipelines. A reverse osmosis flushing pump can be installed on the flushing pipelines. The monitoring tank 217 is connected to a discharge pipeline, which can be equipped with a waste liquid discharge pump. A feed pump can be installed on the pipeline between the deep purification tank 210 and the filter 211. The first-stage reverse osmosis system 214 and the second-stage reverse osmosis system 216 are each connected to a concentrate tank 219. The concentrate tank 219 is connected to a chemical tank 220, and a concentrate pump can be installed on the pipeline between the two. The ultrafiltration tank 213 and the ultrafiltration system 212 can be connected via a backwashing pipeline, on which an ultrafiltration backwashing pump can be installed. A primary reverse osmosis feed pump can be installed between the ultrafiltration tank 213 and the primary reverse osmosis system 214. A secondary reverse osmosis feed pump can be installed on the pipeline between the primary reverse osmosis tank 215 and the secondary reverse osmosis system 216.

[0033] The deep purification membrane treatment unit is relatively large and has high requirements for maintenance space, equipment transportation routes and personnel access. In addition, considering fire protection and flood prevention requirements, this part can be addressed by adding one floor to the overall factory building.

[0034] Based on the source term analysis results and existing wastewater treatment methods, in order to ensure that the radioactivity of the treated wastewater is ≤200 Bq / L, a deep purification membrane treatment unit can be added downstream of the desalination unit, evaporation unit and filtration unit. This unit is used to deeply purify various types of wastewater that still do not meet the emission limits after the above treatment. The decontamination factor of this unit is not less than 100.

[0035] The deep purification membrane treatment unit adopts membrane separation method. Membrane separation method has more advantages in terms of treatment efficiency stability (retention rate ≥92%), overall cost and applicable scenarios. It has a greater cost advantage than evaporation concentration method and significantly reduces the amount of solid waste generated compared with ion exchange method.

[0036] In step S30 above, the number of floors in the factory building is affected by many factors, including the factory building structure of the reference project, the overall land use conditions of the project, the number of equipment involved, the layout plan, the equipment transportation route, fire protection, radiation, personnel access and impact analysis, etc., and should also take into account economic efficiency, the results of professional calculations of building structure, etc.

[0037] It should be noted that the layout of the nuclear waste treatment plant mainly involves electrical and instrumentation equipment, ventilation systems, process systems, and supporting facilities such as hoisting, personnel access, and equipment transportation routes. Process systems include solid waste resin treatment units, concentrate treatment units, descent channel units, and transport vehicle units; waste liquid treatment systems include evaporation units, ion exchange units, membrane treatment units, desalination pretreatment units, and pre-storage tank units; compressed air systems; chilled water systems; and nuclear island condensate and exhaust systems. Ventilation systems include exhaust systems, fresh air systems, iodine exhaust systems, vertical shafts, pressurized air supply systems, and air supply systems. Electrical and instrumentation equipment includes electrical equipment, instrumentation cabinets, and control rooms. Supporting facilities include hoisting openings, cranes, personnel access and equipment transportation routes, transport and transfer equipment, floodable rooms, retention facilities, fire compartments, and radiation zones.

[0038] According to the safety classification principle, the seismic requirements of waste treatment centers mainly stem from the presence of radioactive storage tanks within the plant, and the radioactive source of these tanks is the wet waste treatment unit within the plant. It can be understood that this invention, by moving the wet waste treatment unit of the waste treatment center into the nuclear waste plant, removes the high-radioactivity items originally located within the nuclear power plant waste treatment center. This allows the waste treatment center to meet only the length requirements of pile foundations, with piles reaching up to 70-80 meters or even longer. This solves the problem that pile foundation structures exceeding a certain length cannot meet the seismic Class I structural design requirements of the process.

[0039] This invention, by adding a deep purification membrane treatment unit, can ensure that various waste liquids meet the emission limits after treatment, satisfy the radionuclide emission requirements of near-shore plant sites, and ensure that the concentration of radionuclides other than tritium and carbon-14 at the liquid effluent system discharge outlet does not exceed the limit. The radioactivity index at the discharge outlet must meet the requirements of relevant standards, and can meet the emission requirements of 200 BQ / L specified in GB 6249 for tidal flat areas.

[0040] This invention can meet the requirements of near-shore sites and adapt to the requirements of nuclear island buildings in tidal flat areas, realizing a layout design method for nuclear waste buildings of nuclear power plants that can be widely used in third-generation nuclear power units.

[0041] This invention adopts a layered, block-based, and centralized layout method. Under the premise of meeting specifications and functions, it makes reasonable use of resources, considers the rationality of rooms, uses zoning to distinguish functions, meets various constraints, and rationally divides the space.

[0042] In one embodiment, reference is made to Figure 1 , Figures 4 to 10 The specific steps of S30, which involve arranging the facilities and equipment of a nuclear waste plant in layers, blocks, and centralized locations as several underground floors and several above-ground floors, are as follows: The nuclear waste facility will be constructed from bottom to top as follows: two underground floors, one underground floor, one above-ground floor, two above-ground floors, three above-ground floors, four above-ground floors, five above-ground floors, and six above-ground floors.

[0043] In this embodiment, the second underground floor is used to install at least the following: a ground drainage receiving tank, a waste liquid monitoring tank, a chemical drainage receiving tank, a process drainage receiving tank, a chemical drainage pump, a concentrate pump, a reverse osmosis flushing pump, a waste liquid discharge pump, a process drainage pump, a ground drainage pump, a waste resin flushing tank, a flushing pump, and a gas tank.

[0044] In terms of specific layout, such as Figure 4 As shown, the second basement level can be divided into a first corridor 101, a first staircase and transition room 102, a second staircase and transition room 103, a first front storage tank unit 104, a hoisting room on the second basement level 105, a pump room 106 for each processing unit, a pump room 2 for each processing unit 107, a first conical drying unit 108, etc.

[0045] In this embodiment, the basement level is used to install at least the acid-base pump, concentrate tank, condensate cooler, sampling room, resin intermediate tank, flushing pump, and waste resin transfer pump.

[0046] In terms of specific layout, such as Figure 5 As shown, the underground floor can be divided into the second corridor 201, the third staircase and transition room 202, the fourth staircase and transition room 203, the second front storage tank unit 204, the underground floor hoisting room 205, the valve operation room of each processing unit 1 206, the valve operation room of each processing unit 207, the second conical drying unit 208, etc.

[0047] In this embodiment, the ground floor is used to install at least the evaporation unit, concentrated liquid receiving tank, in-tank drying unit 307, concentrated liquid pump and metering tank, capping machine, dosage monitoring device, waste resin receiving tank, waste resin transfer pump, conical drying receiver, dewatering pump, shielded transfer vehicle, waste resin transfer control room, and transfer control room. In other words, the main equipment of the wet waste treatment unit can be installed on the ground floor.

[0048] In terms of specific layout, such as Figure 6 As shown, the ground floor can be divided into the third corridor 301, the fifth staircase and transition room 302, the sixth staircase and transition room 303, the radioactive pipe room 304, the underground two-story hoisting room 305, the first evaporation unit 306, the barrel drying unit 307, the shielded transfer workshop 308, the third conical drying unit 309, the waste resin transfer unit 310, the first vertical shaft 311, etc.

[0049] In this embodiment, the second floor above ground is used to install at least the nuclear waste plant control room, conical dryer, waste resin metering pump, waste resin metering tank, condensate tank, condensate discharge pump, ultrafiltration permeate room, feed tank, deep purification feed pump, first-stage reverse osmosis feed pump, ultrafiltration backwash pump, first-stage reverse osmosis permeate tank, second-stage reverse osmosis feed pump, chemical reagent addition unit room, filter, desalination unit, concentrate tank, and concentrate pump room. In other words, the main equipment of the deep purification membrane treatment unit can be installed on the second floor above ground.

[0050] In terms of specific layout, such as Figure 7 As shown, the second floor above ground can be divided into the fourth corridor 401, the seventh staircase and transition room 402, the eighth staircase and transition room 403, the first cabinet room 404, the first membrane treatment unit 405, the second evaporation unit 406, the first descending channel unit 407, the fourth conical drying unit 408, the fourth floor hoisting room 409, the second cabinet room 410, and the second shaft 411.

[0051] In this embodiment, the three floors above ground are used for at least the installation of instrumentation and control cabinets, the maintenance hall for the conical dryer, electrical equipment, chemical dosing units, ultrafiltration equipment, reverse osmosis, flocculant injection and sampling rooms.

[0052] In terms of specific layout, such as Figure 8 As shown, the three floors above ground can be divided into the fifth corridor 501, the ninth staircase and transition room 502, the tenth staircase and transition room 503, the third cabinet room 504, the second membrane treatment unit 505, the flocculation injection unit 506, the desalination unit 507, the second descending channel unit 508, the valve operation room of each treatment unit 509, the fifth conical drying unit 510, the hoisting room on the second floor above ground 511, the fourth cabinet room 512, the third shaft 513, etc.

[0053] In this embodiment, the four floors above ground are used to install at least the filter and desalination equipment maintenance and operation hall, distillate cooler, air supply room, iodine exhaust room, exhaust fan room, condenser, high-efficiency filter, and chilled water pump room.

[0054] In terms of specific layout, such as Figure 9 As shown, the four floors above ground can be divided into the sixth corridor 601, the eleventh staircase and transition room 602, the twelfth staircase and transition room 603, the first ventilation room 604, the first condensation unit 605, the first hall 606, the sixth conical drying unit 607, the first chilled water unit 608, the fourth shaft 609, etc.

[0055] In this embodiment, the five floors above ground are used to install at least the air supply room, the iodine exhaust room, the exhaust fan room, and the condenser room.

[0056] In terms of specific layout, such as Figure 10As shown, the four floors above ground can be divided into the seventh corridor 701, the thirteenth staircase and transition room 702, the fourteenth staircase and transition room 703, the second ventilation room 704, the second condensing unit 705, the second hall 706, the passage 707, the spare room 708, the second chilled water unit 709, and the fifth shaft 710, etc.

[0057] In this embodiment, the six floors above ground are used to install at least the chiller unit, the pressurized air supply room, the exhaust room, and the fresh air room.

[0058] This invention provides a layout design method for a nuclear waste facility in a nuclear power plant. The nuclear auxiliary facility is shared by two units, with a design life of 60 years. It adopts a Class I seismic-resistant (enclosing radioactive materials) structure, with a north-south length of 39.70m and an east-west width of 28.00m. It has two underground floors and six floors above ground, with a bottom elevation of -9.00m and a roof elevation of +28.00m. This structure allows for a more rational layout. For valves in the high-radiation zone, radiation zoning is considered, and remote valve rooms, valve compartment rooms, transition rooms, etc. are set up. Flood and retention functions are considered, and thresholds are set up, etc.

[0059] According to the fire compartmentation requirements, a fire door can be installed between the shielded transfer workshop 308 and the passageway.

[0060] First and second stairwells can be set up on both sides of the room, and a transition room for the stairwells can be set up at the entrance to the factory.

[0061] The storage tanks for the pre-storage tank units in the ground drainage receiving tank, process drainage receiving tank, and chemical drainage receiving tank adopt a two-layer through structure. Considering the retention function, a steel platform and ladder are set up at the same location on the first underground floor. Pit pits for receiving the pre-storage tanks can be arranged in the pit pits. The pumps and pipeline valves for the pre-storage tank units are arranged in the process drainage pump room, pipeline valve room, chemical drainage pump room, valve operation room, acid and alkali pump room, and transition room.

[0062] Drying tanks for the concentrate processing unit, dose monitoring devices, automatic capping and sealing devices, salt cake sampling devices, roller conveyors, transfer trolleys, metering tanks, concentrate pumps, shielded door sampling boxes, valves and pipelines, etc. can be installed in the drying room, the room between the concentrate pump and metering tank, the capping machine room, and the dose monitoring room. At the same time, considering radiation zoning, transition rooms can be set up.

[0063] The following facilities can be installed: flushing pump room, waste resin flushing tank room, valve operation room, waste resin transfer pump room, resin intermediate tank room, flushing pump room, waste resin receiving tank room, waste resin transfer pump room, conical dryer receiving room, dewatering pump room, waste resin transfer control room, transfer control room, pipeline and valve room, waste resin metering tank room, waste resin metering pump room, conical dryer room, condensate tank room, condensate discharge pump room, conical dryer maintenance hall, condenser room, and high-efficiency filter room. These facilities include conical dryers, receiving equipment, maintenance cranes, flushing pumps and tanks, transfer pumps, resin intermediate tanks, dewatering pumps and tanks, condensate pumps and tanks, metering pumps and tanks, and supporting pipelines, valves, and control systems.

[0064] Filters, concentrate tanks and pumps, ultrafiltration permeate pumps and pumps, ultrafiltration backwash pumps, primary reverse osmosis feed pumps, ultrafiltration backwash pumps, deep purification feed pumps, primary reverse osmosis feed pumps, pipeline and valve rooms, concentrate tanks, concentrate pump rooms, reverse osmosis rooms, chemical dosing rooms, and ultrafiltration equipment rooms can be installed. These include primary reverse osmosis units, secondary reverse osmosis units, primary reverse osmosis pumps, secondary reverse osmosis pumps, reverse osmosis backwash pumps, primary reverse osmosis permeate tanks, chemical dosing devices, and valves and pipelines. Considering the retention function of the concentrate tank, ultrafiltration permeate tank, and reverse osmosis tank, thresholds and steel ladders are installed. Fire protection facilities are also installed in the pipelines and valves.

[0065] Pipes connected to the GC ditch (process wastewater pipe gallery) can be installed in the underground pipe room on the second basement level.

[0066] The hoisting room can be equipped with two underground floors of equipment and five above-ground hoisting openings.

[0067] Electrical cabinets, instrumentation cabinets, main and secondary trays, etc., for the electrical and instrumentation control systems of nuclear waste facilities can be installed in electrical rooms, fire alarm cabinet rooms, control rooms, electrical equipment rooms, and instrumentation cabinet rooms.

[0068] Chilled water system chillers, chilled water pumps, and their associated pipes and valves can be installed in the chilled water pump room, pipe room, and roof.

[0069] Compressed air tanks for a compressed air system can be installed in the tank room.

[0070] A descent channel and a transition channel can be set up between the valve room and the descent channel. At the same time, a filter element transfer vehicle is set up in the shielded transfer workshop 308 to receive the filter elements and wet waste from the descent channel.

[0071] Monitoring tanks and discharge pumps for the waste liquid system can be installed in the monitoring tank room, waste liquid discharge pump room, and valve operation room.

[0072] Sampling cabinets can be installed in the sampling room.

[0073] The condensate cooler, evaporator, heater, cyclone separator, and valve pipeline of the evaporation unit can be installed in the condensate cooler room, valve operation room, evaporation unit room, and pipeline valve room.

[0074] Desalination devices and filters can be centrally installed on the three floors above ground, and valves and pipes related to desalination devices and filters can be installed in the pipe and valve room.

[0075] Concentrate tanks, their pipelines, and valves can be installed in the concentrate receiving tank room, pipeline and valve room, and radioactive pipe gallery.

[0076] Ventilation facilities such as exhaust fans, supply fans, and iodine exhaust fans can be installed in the air supply fan room, iodine exhaust fan room, exhaust fan room, pressurization room, and pressurized air supply fan room. At the same time, pressurized air supply shafts, air supply shafts, fresh air shafts, iodine exhaust shafts, and exhaust shafts can be installed in the shaft rooms. Exhaust rooms and fresh air rooms can be installed on the roof.

[0077] This invention is applicable to near-shore sites and some areas with limited geological conditions. Under the premise of meeting specifications and functions, it makes reasonable use of resources, considers the rationality of rooms, adopts functional differentiation, meets various restrictions, and makes reasonable divisions, thereby improving the reliability of nuclear waste facilities. It provides a layout design method for nuclear waste facilities of nuclear power plants that can be widely used in third-generation nuclear power units.

[0078] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A method for arranging a nuclear waste building in a nuclear power plant, characterized in that, The arrangement method includes the following steps: The wet waste treatment unit of the waste treatment center will be moved into the nuclear waste facility; A deep purification membrane treatment unit is installed in the nuclear waste facility; The facilities and equipment of the nuclear waste plant are arranged in layers, blocks, and in a centralized manner as several underground layers and several above-ground layers.

2. The method for arranging a nuclear waste building in a nuclear power plant as described in claim 1, characterized in that, The specific steps of arranging the devices and equipment of the nuclear waste plant into several underground floors and several above-ground floors in a layered, block-based, and centralized manner are as follows: The nuclear waste facility is constructed from bottom to top as follows: two underground floors, one underground floor, one above-ground floor, two above-ground floors, three above-ground floors, four above-ground floors, five above-ground floors, and six above-ground floors. The wet waste treatment unit includes a waste resin intermediate tank, a waste resin receiving tank, a waste resin metering tank, a conical dryer, a hot oil unit, a condensation system, a high-efficiency filter, and a waste resin flushing tank. The waste resin receiving tank receives waste resin from the plant itself, and the waste resin intermediate tank receives waste resin from other plants. The intermediate tank is connected to the waste resin receiving tank, and a resin transfer pump is installed on the pipeline between them. The waste resin receiving tank is connected to the waste resin metering tank, and a waste resin transfer pump is installed on the pipeline between them. The waste resin metering tank is connected to the conical dryer, and a... The system includes a waste resin metering pump; the conical dryer is circulated with the hot oil unit and achieves drying by circulating hot oil; the conical dryer is connected to the condenser of the condensation system; the condenser is connected to the secondary condenser; the secondary condenser is connected to the high-efficiency filter; the high-efficiency filter is connected to the waste resin receiving tank, the waste resin flushing tank, and the waste resin metering tank; the waste resin flushing tank is connected to the waste resin receiving tank and is adapted to be connected to the plant drainage system; the condensate tank of the condensation system is connected to the conical dryer and is adapted to be connected to the plant drainage system. The deep purification membrane treatment unit includes a deep purification tank, a filter, an ultrafiltration system, an ultrafiltration box, a primary reverse osmosis system, a primary reverse osmosis water tank, a secondary reverse osmosis system, and a monitoring tank, all connected in sequence. The ultrafiltration system, the primary reverse osmosis system, and the secondary reverse osmosis system are all connected to a chemical cleaning platform. The monitoring tank is connected to the flushing ends of the primary and secondary reverse osmosis systems via flushing pipelines, each equipped with a reverse osmosis flushing pump. The monitoring tank is connected to a discharge pipeline, which is equipped with a waste liquid discharge pump. A feed pump is installed on the pipeline between the deep purification tank and the filter. The primary and secondary reverse osmosis systems are connected to a concentrate tank, which is connected to the chemical tank, with a concentrate pump installed on the pipeline between them. The ultrafiltration box is connected to the ultrafiltration system via a backwashing pipeline, which is equipped with an ultrafiltration backwashing pump. A primary reverse osmosis feed pump is installed between the ultrafiltration box and the primary reverse osmosis system. A secondary reverse osmosis feed pump is installed on the pipeline between the primary reverse osmosis water tank and the secondary reverse osmosis system.

3. The method for arranging a nuclear waste building in a nuclear power plant as described in claim 2, characterized in that, The second underground level shall be used to install at least the following: a ground drainage receiving tank, a waste liquid monitoring tank, a chemical drainage receiving tank, a process drainage receiving tank, a chemical drainage pump, a concentrate pump, a reverse osmosis flushing pump, a waste liquid discharge pump, a process drainage pump, a ground drainage pump, a waste resin flushing tank, a flushing pump, and a gas tank.

4. The method for arranging a nuclear waste building in a nuclear power plant as described in claim 2, characterized in that, The underground floor is at least used to install acid and alkali pumps, concentrate tanks, condensate coolers, sampling rooms, resin intermediate tanks, flushing pumps, and waste resin transfer pumps.

5. The method for arranging a nuclear waste building in a nuclear power plant as described in claim 2, characterized in that, The ground floor shall be used to install at least the following: evaporation unit, concentrate receiving tank, in-tank drying unit, concentrate pump and metering tank, capping machine, dosage monitoring room, waste resin receiving tank, waste resin transfer pump, conical dryer, dewatering pump, shielded transfer vehicle, waste resin transfer control room, and transfer control room.

6. The method for arranging a nuclear waste building in a nuclear power plant as described in claim 2, characterized in that, The above-ground second floor shall be used to install at least the nuclear waste plant control room, conical dryer, waste resin metering pump, waste resin metering tank, condensate tank, condensate discharge pump, ultrafiltration permeate room, feed tank, deep purification feed pump, first-stage reverse osmosis feed pump, ultrafiltration backwash pump, first-stage reverse osmosis permeate tank, second-stage reverse osmosis feed pump, chemical reagent addition unit room, filter, desalinator, concentrate tank, and concentrate pump room.

7. The method for arranging a nuclear waste building in a nuclear power plant as described in claim 2, characterized in that, The three floors above ground shall be used at least for the installation of instrumentation and control cabinets, the maintenance hall for cone dryers, electrical equipment, chemical dosing units, ultrafiltration equipment, reverse osmosis, flocculant injection and sampling rooms.

8. The method for arranging a nuclear waste building in a nuclear power plant as described in claim 2, characterized in that, The four floors above ground shall be used at least for installing a filter and desalination equipment maintenance and operation hall, a distillate cooler, a blower room, an iodine exhaust fan room, an exhaust fan room, a condenser, a high-efficiency filter, and a chilled water pump room.

9. The method for arranging a nuclear waste building in a nuclear power plant as described in claim 2, characterized in that, The five floors above ground shall be used to install at least the air supply room, the iodine exhaust room, the exhaust fan room, and the condenser room.

10. The method for arranging a nuclear waste building in a nuclear power plant as described in claim 2, characterized in that, The six floors above ground shall be used to install at least a chiller unit, a pressurized air supply room, an exhaust room, and a fresh air room.

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