JP5754952B2 - 1/2 primary cooling water system for nuclear power plant and nuclear power plant - Google Patents

Description

  The present invention relates to a primary system facility and a secondary system facility coolant system for a nuclear power plant and a nuclear power plant.

  Nuclear power plants are becoming larger in size in order to accommodate high-power plants. Furthermore, the number of primary system facilities has been increased so that maintenance work can be performed during normal operation.

  Patent Document 1 describes an air conditioning facility for a nuclear power plant including four refrigerators including a spare unit as a cooling water system for the air conditioning facility. This is because three of the four units can be operated to cover the peak load, and in the event of an emergency when one of the refrigerators fails, the spare unit can be operated to provide reliable cooling water supply. is there.

  Patent Document 2 describes an air conditioning method in which cooling water from a common refrigerator is distributed to cooling coils provided for each of a plurality of areas of a nuclear power plant and supplied to each area to cool the supply air. . This is so controlled that the inlet temperature of the cooling water that merges from each area and flows into the refrigerator does not exceed a predetermined set value, and prevents the refrigerator from being overloaded during an overload.

JP 2001-82819 A JP 2002-6075 A

  FIG. 6 is a configuration diagram showing an example of an air conditioning cooling water equipment system in the primary system. The A-system equipment of the primary safety air conditioning cooling water equipment includes an A room air conditioning unit 30, an A room cooling unit 32, an A safety air conditioning cold water pump 33, a safety system air conditioning cold water tank 34, and an evaporator 35. A condenser 36, a SWS (Sea Water System: Reactor Auxiliary Cooling Seawater Equipment) 37, and pipes 38 and 39 are included. In addition, the evaporator 35 and the condenser 36 are a pair and are called a chiller for safety system air conditioning.

  Here, a series of operations of the system A equipment of the primary safety air conditioning cooling water equipment will be described. The cooling water cooled by the evaporator 35 by the refrigerant of the condenser 36 of the A safety system air conditioning chiller is sent by the A safety system air conditioning cold water pump 33 and distributed to each air conditioning device through the pipe line 38. The return cooling water heated by the heat exchange in the A room air conditioning unit 30 and the A room cooling unit 32 is merged into the pipe line 39, returned to the evaporator 35 of the A safety air conditioning chiller, and cooled again. Recirculated. The refrigerant whose temperature is increased by heat exchange in the condenser 36 is cooled by the seawater of the SWS 37. The temperatures of the A room air conditioning unit 30 and the A room cooling unit 32 are controlled by the flow rate of the cooling water. This temperature control is performed by adjusting the flow rate of the cooling water by a valve provided in the pipes 38 and 39. Moreover, the cold water tank 34 for safety system air conditioning is for adjusting the amount of cooling water, and is common to the A and B system facilities.

  B system equipment (portion surrounded by broken line B) similar to the above-described A system facility (portion surrounded by broken line A) constitutes one side of the cooling water facility for primary safety air conditioning. Yes. The pair of C and D system facilities (parts surrounded by broken lines C and D) is configured in the same manner as the pair of A and B system facilities. It is composed. Therefore, the primary safety air conditioning cooling water equipment is constituted by the four A, B, C, and D system equipments.

  Next, the primary non-safety (ordinary) air conditioning cooling water facility (the part surrounded by the broken line E) includes an F cooling unit 41, a G cooling unit 42, an H cooling unit 43, an I cooling unit 44, and an air conditioning unit. The chilled water pump 33, the chilled water tank 34 for air conditioning, the evaporator 35, the condenser 36, the SWS 37, and the pipelines 45, 46, 47 and 48 are configured. As shown in FIG. 6, the cooling water cooled by the safety system air conditioner chillers of the four A, B, C, and D system facilities described above passes through the pipelines 45 and 47 by the respective safety system air conditioner cold water pumps. Water is being sent. The return cooling water whose temperature has been raised by heat exchange in the F to I cooling units 41 to 44 returns to the A to D safety system air-conditioning chiller through the pipes 46 and 48, and is cooled again and recirculated. .

  As described above, the structure of the cooling water facility for air conditioning in the primary system is a large scale in which the safety system and the non-safety (ordinary) system are integrated, and all the cooling for air conditioning in the primary system building. The water system was installed and the plant system was completed in the primary system building.

  In the above-described configuration of the cooling water facility for air conditioning in Patent Document 1, in order to cope with a large output plant, the facility equipment installation space in the primary building is insufficient due to the increase in the size of the equipment and the increase in the number of equipment. was there.

  Moreover, in the structure of patent document 2, since a pump stopped at the time of a periodic inspection, there was a problem that a cooling water facility could not be secured in a secondary system facility, and a dedicated cooling water facility was required.

  The present invention has been made in view of the above, and secures the equipment installation space of the primary system building, and is a 1 / N of a nuclear power plant that can supply cooling water to the secondary system equipment at the time of periodic inspection. It is an object to provide a secondary cooling water system and a nuclear power plant.

  In order to solve the above-described problems and achieve the object, the nuclear power plant 1/2 water cooling system of the present invention is provided with a reactor cooling system including a reactor housed in a reactor containment vessel. A primary system building, and a secondary system building in which a turbine system that exchanges heat with the reactor cooling system is installed, and the primary system building has a cooling water facility for safety system air conditioning of the primary system equipment In the secondary building, a cooling system for non-safety air conditioning of the primary system is installed.

  According to this configuration, the safety system equipment and the non-safety (ordinary) system equipment can be separated from the primary system equipment, and the safety system equipment is installed in the primary system building and has a low management class. It becomes possible to install safety system equipment in the secondary system building. Thereby, the installation equipment installation space of a primary system building is securable.

  The 1 / 2-order cooling water system for a nuclear power plant according to the present invention further includes a secondary system installed in the secondary system building from a chiller facility of a cooling water system for non-safety air conditioning installed in the secondary system building. It is preferable to supply cooling water to the facility.

  According to this structure, the cooling water which cools the air-conditioning chiller equipment by providing the air-conditioning chiller equipment for the non-safety system equipment in the secondary system building is installed in the same secondary system building. It can be supplied to equipment. Thereby, the secondary system equipment can be operated even during the periodic inspection.

  In the 1/2 secondary cooling water system of the nuclear power plant of the present invention, it is preferable that the chiller equipment for supplying cooling water to the secondary equipment is a cooling tower system.

  According to this structure, the cooling water which cools the air-conditioning chiller equipment by providing the air-conditioning chiller equipment for the non-safety system equipment in the secondary system building is installed in the same secondary system building. It can be supplied to equipment. Thereby, the secondary system equipment can be operated even during the periodic inspection.

  In the 1/2 secondary cooling water system of the nuclear power plant of the present invention, it is preferable that the chiller equipment for supplying cooling water to the secondary equipment is a seawater cooling system.

  According to this configuration, the air-conditioning chiller equipment can be provided in the secondary system building and can be made independent of the primary safety-system air-conditioning cooling water equipment. Thereby, the secondary system equipment can be operated even during the periodic inspection.

  The nuclear power plant 1/2 primary cooling water system of the present invention further includes a reactor auxiliary cooling seawater facility in the secondary building that is independent of the cooling water facility for safety air conditioning of the primary facility. And it is preferable to supply cooling water to the secondary system installation installed in the secondary system building.

  According to this configuration, even if the SWS of the cooling water facility for safety system air conditioning stops during the regular inspection, the chiller facility for air conditioning is provided in the secondary system building so that the chiller facility for air conditioning becomes the primary safety system air conditioning system. It can be made independent of the cooling water facility. Thereby, the secondary system equipment can be operated even during the periodic inspection.

  A nuclear power plant according to the present invention includes the above-described nuclear power plant ½-order cooling water system.

  According to this configuration, the safety system equipment and the non-safety (ordinary) system equipment can be separated from the primary system equipment, and the safety system equipment is installed in the primary system building and has a low management class. By providing the safety system facility in the secondary system building, it is possible to secure the equipment installation space in the primary system building. Thereby, the installation equipment installation space of a primary system building is securable. In addition, the cooling water for cooling the air-conditioning chiller equipment is provided to the secondary-system equipment installed in the same secondary-system building by providing the non-safety-system air-conditioning chiller equipment in the secondary system building. It becomes possible. Thereby, the secondary system equipment can be operated even during the periodic inspection.

  According to the 1 / 2-order cooling water system and nuclear power plant of the nuclear power plant of the present invention, safety system equipment and non-safety (ordinary) system equipment can be separated from the primary system equipment. It is possible to secure the installation equipment installation space of the secondary system building and to supply the cooling water to the secondary system equipment during the periodic inspection.

FIG. 1 is a schematic configuration diagram schematically illustrating a nuclear power plant to which the 1 / 2-order cooling water system according to the first embodiment is applied. FIG. 2 is a configuration diagram of a cooling system for a primary safety air conditioning system according to the first embodiment. FIG. 3 is a configuration diagram of a primary safety air conditioning cooling water facility system according to the first embodiment. FIG. 4 is a configuration diagram of a cooling water facility system for air conditioning in the primary non-safety (ordinary) system according to the first embodiment. FIG. 5 is a configuration diagram of a primary non-safety (usual use) air conditioning cooling water system according to the second embodiment. FIG. 6 is a configuration diagram showing an example of a cooling water equipment system for air conditioning in a conventional primary system.

  Embodiments of a nuclear power plant 1 / 2-order cooling water system and a nuclear power plant according to the present invention will be described below in detail with reference to the drawings. In addition, this invention is not limited by this Example. In addition, constituent elements in the following embodiments include those that can be easily replaced by those skilled in the art or those that are substantially the same.

  FIG. 1 is a schematic configuration diagram schematically illustrating a nuclear power plant to which a 1 / 2-order cooling water system according to Embodiment 1 of the present invention is applied.

  The nuclear reactor 5 of the nuclear power plant 1 to which the first embodiment is applied uses light water as a reactor coolant and a neutron moderator, and uses high-temperature and high-pressure water that does not boil throughout the primary system. It is a pressurized water reactor (PWR) that generates steam by sending heat to a generator and exchanging heat with a secondary coolant, and sends this steam to a turbine generator to generate electricity. The present embodiment is not limited to this PWR, but can be applied to an advanced pressurized water reactor (APWR) improved from this PWR, and includes safety and non-safety facilities. It can also be applied to other power plants.

  A nuclear power plant 1 using a nuclear reactor 5 includes a reactor cooling system 3 including a nuclear reactor 5 installed in a primary system building, and a turbine that exchanges heat with the reactor cooling system 3 installed in a secondary system building. A reactor coolant is circulated in the reactor cooling system 3, and a secondary coolant is circulated in the turbine system 4.

  The reactor cooling system 3 includes a nuclear reactor 5 and a steam generator 7 connected to the nuclear reactor 5 through a cold leg 6a and a hot leg 6b. In addition, a pressurizer 8 is interposed in the hot leg 6b, and a reactor coolant pump 9 is interposed in the cold leg 6a. The reactor 5, the cold leg 6 a, the hot leg 6 b, the steam generator 7, the pressurizer 8, and the reactor coolant pump 9 are accommodated in the reactor containment vessel 10.

  The reactor 5 is a pressurized water reactor as described above, and the inside thereof is filled with a reactor coolant. In the nuclear reactor 5, a large number of fuel assemblies 15 are accommodated, and a large number of control rods 16 for controlling nuclear fuel fission in the fuel rods of the fuel assemblies 15 can be inserted into the fuel assemblies 15. Is provided.

  When the nuclear fuel in the fuel rod of the fuel assembly 15 is fissioned while controlling the fission reaction by the control rod 16, thermal energy is generated by this fission. The generated thermal energy heats the reactor coolant, and the heated reactor coolant is sent to the steam generator 7 via the hot leg 6b. On the other hand, the reactor coolant sent from each steam generator 7 via the cold leg 6 a flows into the reactor 5 and cools the reactor 5.

  The pressurizer 8 interposed in the hot leg 6b suppresses boiling of the reactor coolant by pressurizing the reactor coolant that has become high temperature. Moreover, the steam generator 7 generates steam by evaporating the secondary coolant by exchanging heat with the secondary coolant at a high temperature and high pressure, and at the high temperature and pressure. The furnace coolant is being cooled. The reactor coolant pump 9 circulates the reactor coolant in the reactor cooling system 3, and sends the reactor coolant from the steam generator 7 to the reactor 5 through the cold leg 6 a, and also the reactor coolant. From the nuclear reactor 5 to the steam generator 7 through the hot leg 6b.

  The reactor coolant circulates between the reactor 5 and the steam generator 7. The reactor coolant is light water used as a coolant and a neutron moderator.

  The turbine system 4 connects a turbine 22 connected to each steam generator 7 through a steam pipe 21, a condenser 23 connected to the turbine 22, and the condenser 23 and each steam generator 7. And a water supply pump 24 interposed in the water supply pipe 26. A generator 25 is connected to the turbine 22.

  Here, a series of operations in the turbine system 4 of the nuclear power plant 1 will be described. When steam flows from the steam generator 7 into the turbine 22 via the steam pipe 21, the turbine 22 rotates. When the turbine 22 rotates, the generator 25 connected to the turbine 22 generates power. Thereafter, the steam discharged from the turbine 22 flows into the condenser 23. The condenser 23 has a cooling pipe 27 disposed therein, and one of the cooling pipes 27 is connected to a water intake pipe 28 for supplying cooling water (for example, seawater). A drain pipe 29 for draining the cooling water is connected to. The condenser 23 cools the steam flowing in from the turbine 22 by the cooling pipe 27, thereby returning the steam to a liquid. The secondary coolant that has become liquid is sent to the steam generator 7 through the feed water pipe 26 by the feed water pump 24. The secondary coolant sent to the steam generator 7 becomes steam again by exchanging heat with the reactor coolant in the steam generator 7.

  Next, the primary system equipment in the primary system building of the first embodiment will be described with reference to FIGS.

  FIGS. 2 and 3 are primary safety air conditioning cooling water facility system configuration diagrams according to the first embodiment. FIG. 4 is a configuration diagram of a primary non-safety (ordinary) cooling system for air conditioning according to the first embodiment.

  The nuclear power plant 1 of the first embodiment has a configuration in which the safety system equipment and the non-safety (ordinary) system equipment are separated from the primary system equipment, and the safety system equipment is installed in the primary system building as before, The feature is that non-safety equipment with a low management class is installed in the secondary building. Thereby, it becomes possible to ensure the installation equipment installation space in a primary system building. In addition, the cooling water for cooling the air-conditioning chiller equipment is provided to the secondary-system equipment installed in the same secondary-system building by providing the non-safety-system air-conditioning chiller equipment in the secondary system building. It becomes possible. The cooling method of the air-conditioning chiller facility of the first embodiment is a cooling tower method. Safety-related equipment is equipment installed in the controlled area (exposed to radiation), and non-safety equipment is equipment installed in the non-managed area (not exposed to radiation). Non-safety equipment is also described as regular equipment.

  The primary safety air conditioning cooling water facility 100 according to the first embodiment is composed of a pair of A and B system facilities as shown in FIG. 2 and a pair of C and D system facilities as shown in FIG. Yes. Of the pair of A and B system facilities, the A system facility includes an A room air conditioning unit 50, an A room cooling unit 52, an A safety air conditioning chilled water pump 53, a safety system air conditioning chilled water tank 54, an evaporator 55, and a condenser 56. And SWS (Sea Water System) 57 and pipes 58 and 59. Note that the evaporator 55 and the condenser 56 are called a pair of A safety air conditioning chillers. The B system equipment includes a B room air conditioning unit 60, a B room cooling unit 62, a B safety system air conditioning chilled water pump 63, a safety system air conditioning chilled water tank 54, an evaporator 65, a condenser 66, and a SWS (Sea Water System: nuclear reactor). Auxiliary equipment cooling seawater equipment) 67 and pipes 68 and 69. The air-conditioning cold water tank 54 is common to the A and B system facilities. A pair of the evaporator 65 and the condenser 66 is called a B safety system air-conditioning chiller.

  Here, a series of operations of the system A equipment of the primary safety air conditioning cooling water equipment 100 will be described. The cooling water cooled by the evaporator 55 by the refrigerant of the condenser 56 of the A safety system air conditioning chiller is sent by the A safety system air conditioning cold water pump 53 and distributed to each air conditioning device through the pipe 58. The return cooling water heated by the heat exchange in the A room air conditioning unit 50 and the A room cooling unit 52 joins the pipe 59, returns to the evaporator 55 of the A safety air conditioning chiller, and cools again. Recirculated. The refrigerant whose temperature has been raised by heat exchange in the condenser 56 is cooled by the seawater of the SWS 57. The temperatures of the A room air conditioning unit 50 and the A room cooling unit 52 are controlled by the flow rate of the cooling water. This temperature control is performed by adjusting the flow rate of the cooling water using valves provided in the pipes 58 and 59. Moreover, the cold water tank 54 for safety system air conditioning is for adjusting the quantity of cooling water, and is connected to the pipeline 59 and the B system pipeline 69.

  On the other hand, the cooling water cooled by the evaporator 65 by the refrigerant from the condenser 66 of the B safety system air conditioning chiller is sent by the B safety system air conditioning cold water pump 63 and distributed to each air conditioning equipment through the pipe 68. The The return cooling water heated by the heat exchange in the B room air conditioning unit 60 and the B room cooling unit 62 merges into the pipe 69, returns to the evaporator 65 of the B safety system air conditioning chiller, and cools again. Recirculated. The refrigerant whose temperature has been raised by the heat exchange in the condenser 66 is cooled by the seawater of the SWS 67. The temperatures of the B room air conditioning unit 60 and the B room cooling unit 62 are controlled by the flow rate of the cooling water. This temperature control is performed by adjusting the flow rate of the cooling water using valves provided in the pipe lines 68 and 69. Moreover, the cold water tank 54 for safety system air conditioning is for adjusting the quantity of cooling water, and is connected to the pipeline 59 and the B system pipeline 69.

  Since the C and D system equipment shown in FIG. 3 performs the same configuration and operation as the above-described A and B system equipment, only the same parts are denoted by the same reference numerals, and detailed description of each part is omitted.

  Thus, the primary safety air conditioning cooling water facility 100 according to the first embodiment is composed of a pair of A and B system facilities and a pair of C and D system facilities.

  As shown in FIG. 4, the primary non-safety air conditioning cooling water system 200 of the first embodiment includes a radiation control room cooling unit 201, a containment container cooling unit 202, a cooling unit 203, a cooling coil 204, and a regular system air conditioning. Chilled water tank 205, cold water pumps 206, 216, evaporators 207, 217, condensers 208, 218, cooling tower pumps 209, 219, cooling towers 210, 220, water supply lines 230, 231, 232, and return lines 234, 235, and 236. The primary non-safety air conditioning cooling water facility 200 includes a water supply line 240 and a return line 241 for supplying the cooling water cooled by the cooling towers 210 and 220 to the secondary system equipment 250. Note that the evaporators 207 and 217 and the condensers 208 and 218 are each called a common air conditioning chiller.

  Among the above facilities, the radiation control room cooling unit 201, the containment vessel cooling unit 202, the cooling unit 203, and the cooling coil 204 are installed in the primary system building. The cold water tank 205 for normal air conditioning, the cold water pumps 206, 216, evaporators 207, 217, condensers 208, 218, cooling tower pumps 209, 219, and cooling towers 210, 220 are installed in the secondary system building. Installed. In the first embodiment, since the cooling towers 210 and 220 are installed in the secondary system building independently of the primary safety air conditioning cooling water equipment 100, the cooling towers 210 and 220 are used even during regular inspections. The cooled cooling water can be supplied to the secondary system equipment 250 in the secondary system building. In the primary building, the reactor cooling system 3 including the reactor 5 accommodated in the reactor containment vessel 10, the steam generator 7, and their related equipment are installed. In the secondary building, a turbine system 4 that exchanges heat with the reactor cooling system 3, a condenser 23, a generator 25, and related equipment are installed. In the case of a conventional nuclear power plant, the SWS of the cooling system for the safety system air conditioning stopped during the periodic inspection, and the cooling water could not be secured, but the chiller system for the regular system air conditioning was installed in the secondary system building, The secondary system equipment 250 can be operated even during the periodic inspection by making the regular system air-conditioning chiller system independent of the primary system safety air-conditioning cooling water system 100.

  Here, a series of operations of the primary non-safety cooling water facility 200 for air conditioning will be described. The cooling water cooled by the evaporators 207 and 217 by the condensers 208 and 218 of the ordinary air-conditioning chiller is sent by the ordinary-system air-conditioning chilled water pumps 206 and 216, and then passes through the water-feeding pipes 230 and 231. At 232, they merge and are distributed to each air conditioner. The return cooling water whose temperature has been raised by heat exchange in the cooling units 201, 202, 203 and the cooling coil 204 merges with the return pipe 234, and is then distributed to the return pipes 235 and 236 for normal system air conditioning. Return to the chiller evaporators 207 and 217 for cooling and recirculation. The refrigerant whose temperature has been raised by heat exchange in the condensers 208 and 218 is cooled by the cooling water cooled in the cooling towers 210 and 220. The temperatures of the cooling units 201, 202, 203 and the cooling coil 204 are controlled by the flow rate of the cooling water. This temperature control is performed by adjusting the flow rate of the cooling water using valves provided in the water supply pipes 230, 231, 232 and the return pipes 234, 235, 236. Moreover, the cold water tank 205 for regular system air conditioning is for adjusting the quantity of cooling water, and is connected to the return line 234. In this way, by arranging two regular air-conditioning chillers and supplying the regular air-conditioning cooling water, each air-conditioning device can be operated even when one of the regular air-conditioning chillers is stopped by a periodic inspection or the like. be able to.

  According to the first embodiment, the safety system equipment and the non-safety (ordinary) system equipment are separated from the primary system equipment, and the safety system equipment is installed in the primary system building and has a low management class. By providing the safety system facility in the secondary system building, it is possible to secure the equipment installation space in the primary system building.

  In addition, the cooling water for cooling the air-conditioning chiller equipment is provided to the secondary-system equipment installed in the same secondary-system building by providing the non-safety-system air-conditioning chiller equipment in the secondary system building. Therefore, the secondary system equipment can be operated even during the periodic inspection.

  Since the nuclear power plant to which the 1 / 2-order cooling water system according to the second embodiment is applied is the same as that of the first embodiment, detailed description thereof is omitted. The configuration and operation of the primary safety air conditioning cooling water facility according to the second embodiment are the same as those in the first embodiment, and thus detailed description thereof is omitted. The primary safety air conditioning cooling water facility of the second embodiment is composed of a pair of A and B system facilities and a pair of C and D system facilities.

  The nuclear power plant 1 of the second embodiment has a configuration in which the safety system equipment and the non-safety (ordinary) system equipment are separated from the primary system equipment, and the safety system equipment is installed in the primary system building as before, The feature is that non-safety equipment with a low management class is installed in the secondary building. Thereby, it becomes possible to ensure the installation equipment installation space in a primary system building. In addition, by providing the chiller equipment for air conditioning in the secondary system building, it becomes possible to supply the cooling water for cooling the chiller equipment for air conditioning to the secondary system equipment installed in the same secondary system building. . The first embodiment is different from the first embodiment in that the method for cooling the chiller equipment for air conditioning is the seawater cooling method.

  FIG. 5 is a configuration diagram of a primary non-safety (usual use) air conditioning cooling water system according to the second embodiment.

  As shown in FIG. 5, the primary non-safety air conditioning cooling water facility 300 according to the second embodiment includes a radiation control room cooling unit 301, a containment container cooling unit 302, a cooling unit 303, a cooling coil 304, and a regular system air conditioning. Consists of a cold water tank 305, cold water pumps 306, 316 for evaporators 307, 317, condensers 308, 318, SWS 310, 320, water supply lines 330, 331, 332, and return lines 334, 335, 336 Has been. The evaporators 307 and 317 and the condensers 308 and 318 are each called a common system air-conditioning chiller. Further, the primary non-safety cooling water facility 300 includes a water supply line 340 and a return line 341 for supplying seawater taken by the SWSs 310 and 320 to the secondary system equipment 350.

  Among the above facilities, the radiation control room cooling unit 301, the containment vessel cooling unit 302, the cooling unit 303, and the cooling coil 304 are installed in the primary system building. The normal system air conditioning cold water tank 305, the normal system air conditioning cold water pumps 306 and 316, the evaporators 307 and 317, the condensers 308 and 318, and the SWS 310 and 320 are installed in the secondary system building. In the second embodiment, the SWSs 310 and 320 are installed in the secondary system building independently of the primary safety air conditioning cooling water equipment 100, so that the cooling water of the SWSs 310 and 320 can be used even during regular inspections. Can be supplied to the secondary equipment 350 in the secondary building. In the primary building, the reactor cooling system 3 including the reactor 5 accommodated in the reactor containment vessel 10, the steam generator 7, and their related equipment are installed. In the secondary building, a turbine system 4 that exchanges heat with the reactor cooling system 3, a condenser 23, a generator 25, and related equipment are installed. In the case of a conventional nuclear power plant, the SWS of the cooling system for safety air conditioning stopped during periodic inspection, and cooling water could not be secured. However, a chiller facility for regular system air conditioning was installed in the secondary system building. The secondary system equipment 350 can be operated even during the periodic inspection by making the regular system air-conditioning chiller system independent of the secondary system safety air-conditioning cooling water system 100.

  Here, a series of operations of the primary non-safety cooling water facility 300 for air conditioning will be described. The cooling water cooled by the evaporators 307 and 317 by the refrigerant from the condensers 308 and 318 of the normal air conditioning chiller is sent by the normal air conditioning cold water pumps 306 and 316 and sent through the water supply lines 330 and 331. They merge at the water pipe 332 and are distributed to each air conditioner. The return cooling water whose temperature has been raised by heat exchange in the cooling units 301, 302, 303 and the cooling coil 304 merges with the return pipe 334 and is then distributed to the return pipes 335, 336 for use in the chiller for the normal system air conditioning Are returned to the evaporators 307 and 317 and cooled again and recirculated. The refrigerant whose temperature has been raised by heat exchange in the condensers 308 and 318 is cooled by seawater taken in by the SWSs 310 and 320. The temperatures of the cooling units 301, 302, 303 and the cooling coil 304 are controlled by the flow rate of the cooling water. This temperature control is performed by adjusting the flow rate of the cooling water using valves provided in the water supply pipelines 330, 331, 332 and the return pipelines 334, 335, 336. Moreover, the cold water tank 305 for normal use air conditioning is for adjusting the quantity of cooling water, and is connected to the return line 334. By arranging two regular air-conditioning chillers and supplying cooling air for regular air-conditioning in this way, each air-conditioning device can be operated even if one of the regular air-conditioning chillers is stopped during periodic inspection. Can do.

  According to the second embodiment, the safety system equipment and the non-safety (ordinary) system equipment are separated from the primary system equipment, and the safety system equipment is installed in the primary system building and has a low management class. By providing the safety system facility in the secondary system building, it is possible to secure the equipment installation space in the primary system building.

  In addition, the cooling water for cooling the air-conditioning chiller equipment is provided to the secondary-system equipment installed in the same secondary-system building by providing the non-safety-system air-conditioning chiller equipment in the secondary system building. Therefore, the secondary system equipment can be operated even during the periodic inspection.

  As described above, the 1 / 2-system cooling water system and the nuclear power plant of the nuclear power plant according to the present invention are useful for securing the equipment installation space of the primary system building, and particularly the safety system and the non-power system. It is suitable for a nuclear power plant equipped with safety system facilities when it is necessary to supply cooling water to secondary system facilities during periodic inspections.

DESCRIPTION OF SYMBOLS 1 Nuclear power plant 3 Reactor cooling system 4 Turbine system 5 Reactor 6a Cold leg 6b Hot leg 7 Steam generator 8 Pressurizer 9 Reactor coolant pump 10 Reactor containment vessel 15 Fuel assembly 16 Control rod 22 Turbine 23 Condenser 24 Water supply pump 25 Generator 30 Room A air conditioning unit 33 A Safety system air conditioning cold water pump 35 Evaporator 36 Condenser 37 SWS (Reactor auxiliary cooling seawater equipment)
41 F cooling unit 42 G cooling unit 43 H cooling unit 44 I cooling unit 50 Room A air conditioning unit 53 A Safety system air conditioning chilled water pump 55 Evaporator 56 Condenser 57 SWS (Reactor auxiliary cooling seawater equipment)
58, 59 Pipe line 60, 70, 80 B to D room air conditioning unit 63, 73, 83 B to D cold water pump for safety system air conditioning 65, 75, 85 Evaporator 66, 76, 86 Condenser 67, 77, 87 SWS (Reactor auxiliary cooling seawater equipment)
DESCRIPTION OF SYMBOLS 100 Safety system air-conditioning cooling water equipment 200 Non-safety system air-conditioning cooling water equipment 201 Radiation control room cooling unit 202 Containment container cooling unit 206, 216 Regular system air-conditioning cold water pump 207, 217 Evaporator 208, 218 Condenser 210, 220 Cooling tower 250, 350 Secondary system equipment 300 Non-safety system cooling water equipment 301 Radiation control room cooling unit 302 Containment container cooling unit 306, 316 Common system air conditioning chilled water pump 307, 317 Evaporator 308, 318 Condenser 310, 320 SWS

Claims (5)

A primary building in which a reactor cooling system including a pressurized water reactor contained in a reactor containment vessel is installed;
A secondary system building in which a turbine system for heat exchange with the reactor cooling system is installed,
The primary building is equipped with a cooling water facility for safety air conditioning of the primary system,
In the secondary building, a cooling water facility for non-safety air conditioning of the primary system is installed ,
A nuclear power plant characterized in that cooling water is supplied from a chiller facility of the non-safety air conditioning cooling water facility installed in the secondary system building to a secondary system facility installed in the secondary system building. 1 / 2-order cooling water system. Half order based coolant system of a nuclear power plant according to claim 1, characterized in that said said chiller equipment for supplying cooling water to the secondary-system is a cooling tower system. The said chiller facility which supplies cooling water to the said secondary system equipment is a seawater cooling system, The 1 / 2-system cooling water system of the nuclear power plant of Claim 1 characterized by the above-mentioned. A primary building in which a reactor cooling system including a pressurized water reactor contained in a reactor containment vessel is installed;
A secondary system building in which a turbine system for heat exchange with the reactor cooling system is installed,
The primary building is equipped with a cooling water facility for safety air conditioning of the primary system,
In the secondary system building, an auxiliary reactor cooling seawater facility independent of the safety system air conditioning cooling water facility, which is a non-safety air conditioning cooling water facility of the primary system equipment, is installed,
Supplying cooling water from the reactor auxiliary cooling seawater facility of the non-safety cooling water facility installed in the secondary system building to the secondary system facility installed in the secondary system building. half order based coolant system features and to RuHara child power plant. A nuclear power plant comprising the 1 / 2-order cooling water system according to any one of claims 1 to 4 .

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