Temperature raising system for small modular nuclear power plant and temperature raising method using same

Abstract

The present invention relates to a temperature raising system for a small modular nuclear power plant, comprising: a nuclear reactor assembly unit including a plurality of integrated nuclear reactors; a turbine unit which operates through steam supplied from an operating nuclear reactor being in operation in the reactor assembly unit; and a steam storage unit in which at least part of the steam supplied to the turbine unit is extracted and stored, and which supplies the steam to a starter nuclear reactor requiring to be started in the nuclear reactor assembly unit.

Description

Temperature raising system for a small modular nuclear power plant and temperature raising method using the same

[0001] The present invention relates to a temperature raising system for a small modular nuclear power plant and a temperature raising method using the same.

[0002] In the case of existing large nuclear power plants, the temperature for initial startup of the reactor was raised through heating using a large coolant pump (RCP) within the power plant.

[0003] In the case of nuclear power plants that include small modular reactors, the use of large coolant pumps used in commercial nuclear power plants is not possible due to space constraints, and canned type coolant pumps are generally used.

[0004] However, the canned type coolant pump also has the problem that the coolant pump size must be large in order to raise the temperature to the high temperature atmospheric temperature for the initial start-up of the reactor, which causes a problem that places a great burden on the reactor design.

[0005] The purpose of the present invention is to provide a temperature raising system for a small modular nuclear power plant and a temperature raising method using the same.

[0006] The present invention relates to a temperature raising system for a small modular nuclear power plant, comprising: a reactor assembly including a plurality of integrated reactors; a turbine section that operates using steam supplied from an operating reactor in the reactor assembly; and a steam storage section that extracts and stores at least a portion of the steam supplied to the turbine section and supplies steam to a starting reactor in the reactor assembly that needs to be started.

[0007] When all of the above reactor assemblies are stopped, a steam production unit may be further included to produce steam and supply steam to the steam storage unit.

[0008] The above steam storage unit may be in the form of an elongated tube.

[0009] The present invention relates to a temperature raising method of a small modular nuclear power plant, comprising: a step of storing a portion of steam generated from an operating reactor in operation among a reactor assembly including a plurality of integrated reactors in a steam storage; and a step of supplying at least a portion of the steam stored in the steam storage to a starting reactor that needs to be started.

[0010] The method further comprises a step of supplying steam generated in the operating reactor to a turbine section; and a step of operating the turbine section using the supplied steam; wherein the steam in the steam storage section can be supplied from steam supplied to the turbine section from the operating reactor or from bleed steam generated by the operation of the turbine section.

[0011] The temperature of the starting reactor can be increased for initial startup by supplying steam stored in the above steam storage unit.

[0012] A step of producing steam through a steam production unit; and a step of supplying the steam produced through the steam production unit to the steam storage unit; wherein the production of steam through the steam production unit can be performed when all of the reactor assemblies are stopped.

[0013] The production of steam through the above steam production unit may be generated through a mobile boiler.

[0014] According to the present invention, a temperature raising system for a small modular nuclear power plant and a temperature raising method using the same are provided.

[0015] Figure 1 illustrates a temperature increase system of a small modular nuclear power plant according to one embodiment of the present invention.

[0016] Figure 2 is a flowchart showing a temperature increase method of a small modular nuclear power plant according to one embodiment of the present invention.

[0017] Figure 3 illustrates the operation of a temperature raising system in a temperature raising method of a small modular nuclear power plant according to one embodiment of the present invention.

[0018] Figure 4 is a flowchart showing a temperature raising method of a small modular nuclear power plant according to another embodiment of the present invention.

[0019] Figure 5 illustrates the operation of a temperature raising system in a temperature raising method of a small modular nuclear power plant according to another embodiment of the present invention.

[0020] The present invention will be described in more detail with reference to the drawings below.

[0021] The attached drawings are merely examples intended to more specifically illustrate the technical concepts of the present invention, and therefore, the scope of the present invention is not limited to the attached drawings. Furthermore, the attached drawings may exaggerate the size and spacing of components to illustrate the relationships between components.

[0022] Hereinafter, the “small modular reactor” or “integrated reactor” in the present invention is also called a small modular reactor, and refers to a reactor in which a steam generator and a pressurizer are arranged within the reactor.

[0023] Referring to FIG. 1, a temperature raising system (10, hereinafter referred to as “temperature raising system”) of a small modular nuclear power plant according to one embodiment of the present invention is described.

[0024] Figure 1 illustrates a temperature increase system of a small modular nuclear power plant according to one embodiment of the present invention.

[0025] The temperature increase system (10) includes a reactor assembly (100), a turbine section (200), a steam storage section (300), a steam production section (400), a main steam pipe (500), a main feedwater pipe (600), a bleed steam supply pipe (700), an extraction steam supply pipe (800), a storage steam supply pipe (900), and a production steam supply pipe (1000).

[0026] The reactor assembly (100) includes a plurality of integrated reactors (M1, M2). Referring to FIG. 1, in the present invention, the reactor assembly (100) is illustrated as having only integrated reactor modules including a movable reactor (M1) and a starter reactor (M2), but is not limited thereto.

[0027] The turbine section (200) is operated by steam supplied from an operating reactor (M1) among the reactor assembly sections (100).

[0028] The steam storage unit (300) extracts and stores at least a portion of the steam supplied to the turbine unit (200), and supplies steam to the start-up reactor (M2) that requires start-up among the reactor assembly (100).

[0029] The steam storage unit (300) has a long, extended tube shape, but is not limited thereto.

[0030] The steam production unit (400) produces steam and supplies it to the steam storage unit (300) when the entire reactor assembly (100) is stopped.

[0031] The main steam pipe (500) transfers steam discharged from the operating reactor (M1) to the turbine section (200), and the main feedwater pipe (600) transfers cooling water generated by the operation of the turbine section (200) to the operating reactor (M1).

[0032] The extraction steam supply pipe (700) transfers the extraction steam generated by the operation of the turbine section (200) to the steam storage section (300), and the extraction steam supply pipe (800) transfers a portion of the steam extracted from the steam supplied from the turbine section (200) to the steam storage section (300).

[0033] The storage steam supply pipe (900) transfers steam from the steam storage unit (300) to the reactor assembly unit (100), and the production steam supply pipe (1000) transfers steam generated from the steam production unit (400) to the steam storage unit (300).

[0034] (Although not shown) installed on the main steam pipe (500), the main feed water pipe (600), the extraction steam supply pipe (700), the extraction steam supply pipe (800), the storage steam supply pipe (900) and the production steam supply pipe (1000), at least one individual control valve may be further installed to control the amount of steam discharged, and the installation location and number of installations may be changed.

[0035] Referring to FIGS. 2 and 3, a method for increasing the temperature of a small modular nuclear power plant according to an embodiment of the present invention and the operation of a temperature increasing system according to the method are described.

[0036] FIG. 2 is a flowchart showing a temperature raising method of a small modular nuclear power plant according to an embodiment of the present invention, and FIG. 3 shows the operation of a temperature raising system in a temperature raising method of a small modular nuclear power plant according to an embodiment of the present invention.

[0037] Below, among the integral reactors, M1 is described as an operational reactor that is in operation, and M2 is described as a start-up reactor that requires start-up.

[0038] First, steam generated from an operating reactor (M1) among the reactor assembly (100) including multiple integrated reactors is supplied to the turbine section (200). (S100)

[0039] Referring to Fig. 3, steam generated in an operating reactor (M1) is transferred (①) to a turbine section (200) through a main steam pipe (500), and the transferred steam operates the turbine section (200).

[0040] Next, some steam is extracted from the main steam pipe (500), the extracted steam is delivered (②) through the extraction steam supply pipe (800), and the delivered steam is stored in the steam storage unit (300). In addition, the extraction steam generated by the operation of the turbine unit (200) is delivered (③) through the extraction steam supply pipe (700) and stored in the steam storage unit. (S200)

[0041] Extraction steam and purge steam can be performed selectively, and there are multiple operating reactors (M1), and steam can be extracted from some or all of the operating reactors (M1). Although not limited to this, steam extraction is possible from an operating reactor (M1) with a high output.

[0042] Afterwards, the steam stored in the steam storage unit (300) is supplied (④) to the startup reactor (M2) requiring startup through the stored steam supply pipe (900). (S400) As a result, the temperature of the startup reactor is raised.

[0043] Referring to FIGS. 4 and 5, a method for increasing the temperature of a small modular nuclear power plant according to another embodiment of the present invention and the operation of a temperature increasing system according to the method are described.

[0044] FIG. 4 is a flowchart showing a temperature raising method of a small modular nuclear power plant according to another embodiment of the present invention, and FIG. 5 shows the operation of a temperature raising system in a temperature raising method of a small modular nuclear power plant according to another embodiment of the present invention.

[0045] First, the temperature raising method of a small modular nuclear power plant according to another embodiment of the present invention and the operation of the temperature raising system according to the method are performed when all integrated reactors in the reactor assembly (100) in the power plant are stopped.

[0046] First, steam is produced through the steam production unit (400). (S1000)

[0047] Referring to Figure 5, steam production can utilize steam generated in a steam production facility within a nuclear power plant, or steam generated within the plant can be stored and used as needed. Additionally, steam generated by a mobile boiler can be utilized.

[0048] Next, the steam produced through the steam production unit (400) is supplied to the steam storage unit (300). (S2000)

[0049] At this time, the steam is supplied by transmitting (①) the steam generated through the steam production unit (400) through the production steam supply pipe (1000), and the transmitted steam is stored in the steam storage unit (300) in the form of a long, extended tube.

[0050] Afterwards, the steam stored in the steam storage unit (300) is supplied (②) to the operating reactor (M1) that was stopped through the extraction steam supply pipe (800), and the temperature of the operating reactor (M1) is raised for the first start-up. (S3000)

[0051] Steam generated from an operating reactor (M1) is transferred (③) to a turbine section (200) through a main steam pipe (500), and the transferred steam operates the turbine section (200). (S4000)

[0052] Next, some steam is extracted from the main steam pipe (500), the extracted steam is delivered (④) through the extraction steam supply pipe (800), and the delivered steam is stored in the steam storage unit (300). In addition, the extraction steam generated by the operation of the turbine unit (200) is delivered (⑤) through the extraction steam supply pipe (700) and stored in the steam storage unit (300). (S5000)

[0053] Afterwards, the steam stored in the steam storage unit (300) is supplied (⑥) to the startup reactor (M2) requiring startup through the stored steam supply pipe (900). (S6000) As a result, the temperature of the startup reactor (M2) is increased.

[0054] In the present invention, the temperature increase of the integrated reactor using the temperature increase system (10) is shown to be performed only in the operating reactor (M1) and the start-up reactor (M2), but it is not limited thereto, and the temperature increase of a plurality of integrated reactors (M3, M4, M5, ......) in the reactor assembly (100) is performed simultaneously or sequentially according to the temperature increase method of the present invention.

[0055] The embodiments of the present invention described above and illustrated in the drawings should not be construed as limiting the technical concept of the present invention. The scope of protection of the present invention is limited only by the matters set forth in the claims, and those skilled in the art will be able to make various improvements and modifications to the technical concept of the present invention. Accordingly, such improvements and modifications, as long as they are obvious to those skilled in the art, will fall within the scope of protection of the present invention.

Claims

1. Regarding the temperature increase system of a small modular nuclear power plant, A reactor assembly comprising a plurality of integral reactors; A turbine section that operates through steam supplied from an operating reactor among the above reactor assembly sections; and A temperature raising system for a small modular nuclear power plant, comprising: a steam storage section in which at least a portion of the steam supplied to the turbine section is extracted and stored, and which supplies steam to a start-up reactor among the reactor assembly sections that requires start-up.

2. In paragraph 1, A temperature raising system for a small modular nuclear power plant further comprising a steam production unit that produces steam and supplies steam to the steam storage unit when all of the above reactor assemblies are stopped.

3. In paragraph 1, The above steam storage unit is a temperature raising system of a small modular nuclear power plant in the form of an elongated tube.

4. Regarding a method for increasing the temperature of a small modular nuclear power plant, A step of storing a portion of steam generated from an operating reactor in a steam storage unit among a reactor assembly including a plurality of integral reactors; and A method for temperature elevation of a small modular nuclear power plant, comprising the step of supplying at least a portion of the steam stored in the steam storage to a start-up reactor requiring start-up.

5. In paragraph 4, A step of supplying steam generated in the above-mentioned operating reactor to the turbine section; and further comprising a step of operating the turbine section using the supplied steam; The steam in the above steam storage unit is, A temperature raising method of a small modular nuclear power plant supplied from steam supplied to the turbine section from the above-mentioned operating reactor or from the exhaust steam generated by the operation of the turbine section.

6. In paragraph 5, A temperature raising method for a small modular nuclear power plant, in which temperature raising for initial startup of the starting reactor is performed by supplying steam stored in the above steam storage.

7. In paragraph 4, A step of producing steam through a steam production unit; and It further includes a step of supplying steam produced through the above steam production unit to the above steam storage unit; A method for increasing the temperature of a small modular nuclear power plant, wherein the production of steam through the above steam production unit is performed when the entire reactor assembly is stopped.

8. In paragraph 7, The production of steam through the above steam production unit is A method for increasing the temperature of a small modular nuclear power plant using a mobile boiler.

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