KR101933397B1 - Flow mixing equipment and reactor with the same - Google Patents

Abstract

The present invention includes a header assembly for mixing a reactor coolant of similar temperature or different temperature supplied from a plurality of steam generators, respectively, to a core, the header assembly being configured to cool the reactor coolant at the same or different temperature An inlet region; An outlet region for discharging said mixed reactor coolant to said core; And a plurality of headers disposed between the inlet region and the outlet region and stacked in an up-down direction to mix reactor coolant introduced through the inlet region, wherein at least one of the plurality of headers has an inlet region or outlet Providing a flow mixing facility that shares a portion of the area.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flow mixing apparatus,

The present invention relates to a flow mixing apparatus for mixing reactor coolants of different temperatures from a plurality of steam generators when they are discharged and supplying the reactor coolant at a relatively uniform temperature to the reactor core, and a reactor having the same.

The reactor is a separate type reactor (eg, domestic pressurized light water reactor) in which main equipment (steam generator, pressurizer, pump impeller, etc.) is installed outside the reactor depending on the installation position of the reactor coolant system main equipment, Modular reactors in which some of the major equipment, such as reactors (eg SMART reactors) and steam generators, are installed modularly outside the reactor vessel.

Generally, steam generators are installed in two or three units outside a reactor vessel in a separate reactor, and eight or more units are installed in a reactor vessel in an integrated reactor. In a modular reactor, a steam generator is connected to a nozzle outside the reactor vessel Respectively.

In addition, an annular space is formed on the side of the reactor vessel in an integrated, modular or separable reactor to recirculate the reactor coolant (primary fluid) discharged from the core to the core, and the annular space of the integral reactor is connected to a separate reactor or a modular reactor And a plurality of steam generators are arranged in the circumferential direction in the annular space formed inside the integral nuclear reactor.

However, multiple steam generators can be supplied with reactor coolant at a non-uniform temperature to the reactor core if performance differences or failures occur due to various causes. In the case of integral reactors or modular reactors, if the flow length from the steam generator to the reactor core is short and the reactor coolant is discharged from the steam generator at uneven temperature, the reactor coolant with a large temperature difference will flow into the reactor core . In particular, when the operation of some steam generators is stopped due to accidents or the performance of some steam generators is significantly deteriorated due to aging, the temperature unevenness of the reactor coolant is inevitably increased.

Therefore, in the case of an integrated reactor or a modular nuclear reactor in which a separate mixing device is not provided at the discharge portion of the steam generator, a reactor core is designed to have a sufficient thermal margin based on the assumption that a reactor coolant of non- There is a disadvantage in terms of economic efficiency and safety of nuclear power plants.

In the nuclear industry, in order to uniformize the core temperature distribution of the integrated reactor, a flow mixed header aggregate is installed at the lower part of the steam generator, the different temperature fluid is introduced into each header, (See the prior art below).

In the conventional flow mixed header aggregate, a plurality of headers are installed for each stage, and a flow direction flowing into the header from the inlet region of the flow mixed header aggregate and a flow direction flowing from the header to the outlet region of the flow mixed header aggregate And the same size of space is allocated to each header, so that the channel area of the header is reduced, so that the channel resistance is increased.

Particularly, when a compact steam generator is applied to make the reactor vessel more compact, a problem that the flow resistance increases more when the annular space of the reactor vessel is small, and thus a compact steam generator is applied There is a limit.

Korean Patent No. 10-0647808 (November 13, 2006)

Kim, Young-In et al., Analysis of Heat Mixing Characteristics of SMART Flow Mixing Header Assembly, Journal of Korea Society of Computational Fluids Engineering, Vol.20, No.1, pp.84-91, 2015. 3

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a flow mixing apparatus capable of solving the problem that the flow path resistance is increased due to a reduction in the flow path area even when the annular space of the reactor vessel is small in an integral or modular reactor, .

In order to accomplish the object of the present invention, a flow mixing apparatus according to the present invention includes a header assembly for mixing a reactor coolant supplied from a plurality of steam generators and discharging the coolant into a core, An inlet region through which the gas flows; An outlet region for discharging said mixed reactor coolant to said core; And a plurality of headers disposed between the inlet region and the outlet region and stacked in an up-down direction to mix reactor coolant introduced through the inlet region, wherein at least one of the plurality of headers has an inlet region or outlet It is possible to share a part of the area.

According to one embodiment of the present invention, the at least one header may share a portion of the entrance area and the exit area.

According to an embodiment of the present invention, the plurality of the headers may be installed inside the reactor vessel, and the first to n-th stage headers (n is a natural number of 2 or more) may be laminated from the upper side to the lower side.

According to one embodiment of the present invention, a part of the first-stage header overlaps with the entrance area and the exit area, and a part of the n-th header may overlap with the entrance area.

According to one embodiment of the present invention, a part of the first-stage header overlaps with the exit area in a vertical direction, and a part of the n-th header may overlap with the entrance area.

According to one embodiment of the present invention, the at least one header may emit the reactor coolant in a different direction than the other header.

According to one embodiment of the present invention, the at least one header may emit the reactor coolant in a vertically downward direction.

According to one embodiment of the present invention, the at least one header may emit the reactor coolant in a horizontal or oblique direction.

According to an embodiment of the present invention, the plurality of steam generators may be disposed along the circumferential direction on the outside of the reactor vessel.

According to an embodiment of the present invention, the reactor coolant supplied from the plurality of steam generators may be introduced into the inlet region through the side of the reactor vessel.

According to an embodiment of the present invention, the plurality of steam generators may be arranged in a circumferential direction inside the reactor vessel.

According to one embodiment of the present invention, the inlet region is disposed below the plurality of steam generators, and the reactor coolant may flow into the inlet region from the plurality of steam generators in a downward direction.

According to an embodiment of the present invention, each of the plurality of the headers is formed in an annular structure, and an inlet channel is formed at one side of each of the plurality of the header, Direction.

According to an embodiment of the present invention, a plurality of discharge portions may be disposed on the other side of each of the plurality of the headers at predetermined intervals along the circumferential direction, and the reactor coolant may be sprayed.

According to an embodiment of the present invention, each of the plurality of discharge portions may be formed in a circular or narrow channel shape.

According to an embodiment of the present invention, the plurality of emitters may be disposed in upper and lower rows, and the upper row and the lower row may be arranged in a zigzag form.

According to one embodiment of the present invention, the direction of injection of the fluid injected through the plurality of discharge portions may be in the direction from the outer side of the reactor vessel to the center or from the central portion of the reactor vessel to the outer side.

According to an embodiment of the present invention, a plurality of inlet dividing plates partitioning into a plurality of sections along the circumferential direction of the reactor vessel may be provided in the inlet region so as to be spaced apart from each other.

According to an embodiment of the present invention, a plurality of steam generators may be installed in each of the plurality of zones.

According to one embodiment of the present invention, one header may be allocated to each of the plurality of zones.

According to an embodiment of the present invention, one header may be assigned to each of the plurality of steam generators.

A reactor according to the present invention includes: a reactor vessel having a core inside; A plurality of steam generators installed inside or outside the reactor vessel; And a header assembly installed inside the reactor vessel and mixing the reactor coolant supplied from the plurality of steam generators and discharging the coolant into a reactor core, the header assembly comprising: an inlet region for introducing the reactor coolant; An outlet region for discharging said mixed reactor coolant to said core; And a plurality of headers disposed between the inlet region and the outlet region and stacked in an up-down direction to mix reactor coolant introduced through the inlet region, wherein at least one of the plurality of headers has an inlet region or outlet It is possible to share a part of the area.

According to the flow mixing apparatus of the present invention configured as described above, the following effects are obtained.

First, when a high-temperature or low-temperature fluid having different temperatures is unevenly cooled from a plurality of steam generators, at least a part of the plurality of headers share a flow path with an inlet area or an outlet area, The flow path can have a wider flow path, thereby reducing the overall flow rate and reducing the flow path resistance.

Second, the flow mixing apparatus of the present invention can be applied to a modular reactor in which a steam generator is installed outside a reactor vessel or an integrated reactor in which a steam generator is installed inside a reactor vessel.

Thirdly, as a part of the inlet area or the outlet area of the header assembly is shared with a part of the header, the flow rate of the inlet area or the outlet area is reduced and the flow distance is shortened so that the flow path resistance of the inlet area or the outlet area can be reduced.

Fourth, the reduction of the flow rate, flow velocity, or flow distance reduces the overall flow resistance, thereby alleviating the problem of a large increase in flow resistance even when the annular space of the reactor vessel is small, .

Fifth, by constructing a flow mixing facility with a relatively small flow resistance while maintaining similar mixing performance as a conventional flow mixing facility, it contributes to securing the thermal margin of the reactor core, while reducing the capacity of the reactor coolant pump .

1 is a conceptual diagram showing a modular nuclear reactor to which a flow mixing apparatus according to a first embodiment of the present invention is applied.
Figure 2 is a vertical cross-sectional view of the header assembly in Figure 1;
Figure 3 is an exploded view of the plates D1, D2, D3 showing the emitters of the second and third stage header in Figure 2;
Figure 4 is an exploded view of the plate E showing the inlet channel of the second and third stage header in Figure 2;
5 is a horizontal cross-sectional view of plate B showing the inlet channel and discharge hole of the first stage header in FIG. 2;
6 is a horizontal cross-sectional view of the plate C showing the inlet channel of the fourth-stage header in FIG.
FIG. 7 is a horizontal sectional view showing a cross-section of the second-stage header in FIG. 2. FIG.
8 is a vertical sectional view showing a header assembly according to a second embodiment of the present invention.
FIG. 9 is an exploded view of the plates D1 to D4 showing the discharge ports of the inlet channel, the second-stage to the fourth-stage header of the first-stage header in FIG.
Fig. 10 is an exploded view of a plate E showing the inlet channel of the second and third stage header in Fig. 8;
11 is a horizontal cross-sectional view of plate A showing the inlet holes of the inlet region connected with the discharge portion of the zone-specific steam generator in FIG.
12 is a horizontal cross-sectional view of plates B1, B2 showing the inlet downflow path of the discharge hole and inlet area of the first stage header.
13 is a horizontal cross-sectional view of a plate C showing an inlet channel of the fourth-stage header.
14 is a horizontal sectional view showing a section of the third-stage header in Fig.
15 is a conceptual diagram showing a flow mixing equipment according to a third embodiment of the present invention.
16 is a conceptual diagram showing a flow mixing equipment according to a fourth embodiment of the present invention.
17 is a conceptual diagram showing a flow mixing equipment according to a fifth embodiment of the present invention.
18 is a conceptual diagram showing a flow mixing equipment according to a sixth embodiment of the present invention.
19 is a conceptual diagram showing a flow mixing equipment according to a seventh embodiment of the present invention.

Hereinafter, a flow mixing apparatus and a reactor including the same according to the present invention will be described in detail with reference to the drawings. The singular expressions include plural expressions unless the context clearly dictates otherwise.

In the following description of the embodiments of the present invention, a detailed description of related arts will be omitted when it is determined that the gist of the embodiments disclosed herein may be obscured.

1 is a conceptual view showing a modular reactor 10 to which a flow mixing apparatus 100 according to a first embodiment of the present invention is applied, FIG. 2 is a vertical sectional view showing a header assembly 100a in FIG. 1, 2 is an exploded view of plates D1, D2 and D3 showing the discharge of the second and third stage header 130 in FIG. 2, and FIG. 4 is an exploded view of the inlet channel 121 of the second and third stage header 130 FIG. 5 is a horizontal sectional view of a plate B showing an inlet channel 111 and a discharge hole of the first-stage header 110 in FIG. 2, and FIG. 6 is a horizontal cross- FIG. 7 is a horizontal sectional view showing a section of the second stage header 120 in FIG. 2. FIG. 7 is a horizontal sectional view of the plate C showing the inlet channel 111 of the second stage header 140.

A core 12 is provided at the lower center of the reactor vessel 11. A fuel rod can be loaded into the core 12 to generate heat by fission.

The reactor coolant is stored inside the reactor vessel 11 and the reactor coolant can be cooled by heat generated in the core 12 as it is circulated inside the reactor vessel 11 by the reactor coolant pump 14.

The reactor coolant pump 14 forcibly circulates the reactor coolant inside the reactor vessel 11. Thereby the high temperature reactor coolant heated in the core 12 rises along the core support barrel 13 and flows along the flow path between the upper guide structure and the core support barrel 13 and the core support barrel 13, (11). ≪ / RTI > The reactor coolant introduced into the space between the core support barrel 13 and the reactor vessel 11 by the power of the reactor coolant pump 14 is supplied to the steam generator 16 to be cooled through heat exchange and then returned to the lower portion of the core 12 And circulated.

The steam generator 16 is disposed at the boundary between the primary system and the secondary system. The steam generator 16 may be installed inside or outside the reactor vessel 11 along a circumferential direction. Fig. 1 shows a modular reactor 10 in which a plurality of steam generators 16 are installed outside the reactor vessel 11. Fig. However, modular or modular reactors are used in various other meanings, but in the present invention, the modular reactor is used in the meaning that the steam generator 16 is connected to the reactor vessel through a nozzle as described above. The plurality of steam generators 16 may be installed outside the reactor vessel 11 higher than the core 12. An inlet pipe 16a is provided above the side surface of the steam generator 16 and an outlet pipe 16b is provided below the side surface of the steam generator 16. The inlet pipe 16a is connected to the inside of the reactor vessel 11 through a nozzle so that the reactor coolant supplied from the reactor coolant pump 14 flows into the steam generator 16 through the inlet pipe 16a . The outlet pipe 16b is connected to the inside of the reactor vessel 11 through a nozzle so that the reactor coolant cooled in the steam generator 16 can be discharged into the reactor vessel 11. [

The steam generator 16 is configured to receive heat from the reactor coolant system by exchanging heat between the hot reactor coolant and the low temperature feedwater. A water supply pipe is connected between the water supply system 17 and the steam generator 16 and an isolation valve 17a is installed in the water supply pipe so that water is supplied from the water supply system 17 to the steam generator 16 ). ≪ / RTI >

The turbine system 18 is a system that generates energy using the steam generated in the steam generator 16. The turbine system 18 comprises a turbine that converts the fluid energy of the steam into mechanical energy and a generator that converts the mechanical energy into electrical energy. A steam pipe is connected between the turbine system 18 and the steam generator 16 and an isolation valve 17a is installed in the steam pipe so that the steam is supplied from the steam generator 16 to the turbine system 18 ). ≪ / RTI >

The side surface of the reactor vessel 11 can be divided into four zones along the circumferential direction, that is, the first zone 11a to the fourth zone 11d. 5, the first zone 11a is a zone located at the upper right of the quadrant (four quadrants divided by the horizontal axis and the vertical axis intersecting each other at right angles), the second zone 11b is located at the upper left corner The third zone 11c is a zone located on the lower left, and the fourth zone 11d is a zone located on the lower right. At least one steam generator 16 per zone may be assigned. A plurality of steam generators 16 may be referred to as one train steam generator 16 when a plurality of steam generators 16 (e.g., two or three) are connected in a bundle. The outlet pipe 16b of the steam generator 16 may be assigned to one zone or one per train.

The flow mixing apparatus 100 of the present invention is configured to mix a reactor coolant of different temperatures from a plurality of steam generators 16 when they are discharged and to supply them to the nuclear reactor core 12 at a relatively uniform temperature, ).

To this end, the header assembly 100a may be provided inside the reactor vessel 11. The header assembly 100a can be disposed in the annular space 15 formed between the core support barrel 13 and the reactor vessel 11. The header assembly 100a may be installed in a reactor coolant flow path connecting the plurality of steam generators 16 and the core 12. [ The outlet pipe 16b of the steam generator 16 is connected to be communicated with the side of the header assembly so that the reactor coolant discharged from the steam generator 16 can be supplied to the outer side of the header assembly 100a.

The header assembly 100a may be formed by stacking a plurality of headers in an annular structure. A hollow portion is formed inside the header assembly 100a, and the core supporting barrel 13 may be arranged to penetrate the hollow portion of the header assembly 100a. A core support barrel 13 is disposed between the core 12 and the header assembly 100a and the reactor coolant discharged from the inner side of the header assembly 100a descends along the core support barrel 13, As shown in FIG. The lower end of the core support barrel 13 extends to the lower end of the core 12 and the upper end of the core support barrel 13 can extend to the impeller inlet of the reactor coolant pump 14.

The header assembly 100a includes an entrance area 101, an exit area 103, and first to n-th stage headers. n is a natural number of 2 or more. In this embodiment, the first to fourth header 140 may be used. Further, it is assumed that a steam generator 16 of one train is allocated to one outside of the reactor vessel 11 and a total of four train steam generators 16 are installed in four zones, It is not.

The inlet region 101 is formed on the outer side surface of the header assembly 100a toward the inner side of the reactor vessel 11 and the reactor coolant discharged from the plurality of steam generators 16 flows into the plurality of header Distribution area. The inlet area 101 is in communication with the outlet pipe 16b of the steam generator 16 assigned to each zone. The reactor coolant introduced from the steam generators 16 of the first and second trains may flow into the first and second stage header 120 along the top inlet region 101. In addition, the reactor coolant introduced from the steam generators 16 of the third and fourth trains may flow into the third and fourth stage header 140 along the lower inlet region 101. The inlet region 101 may be partitioned into four zones by a plurality of inlet / outlet plates 102. Each of the plurality of inlet / outlet plates 102 may extend in the vertical direction from the bottom surface of the first stage header 110 to the top surface of the fourth stage header 140, and may be spaced apart from each other along the circumferential direction.

The outlet region 103 is formed on the inner side of the header assembly 100a toward the core support barrel 13 and is an area where the reactor coolant is discharged from each of the plurality of the headers to merge. The outlet region 103 is opened downwardly of the header assembly 100a so that the reactor coolant discharged from each header can be moved downward along the outlet region 103 and transferred to the lower portion of the core 12. [

The first to fourth header units 110, 120, 130 and 140 may be stacked in the vertical direction. The first to fourth header 110, 120, 130 and 140 may be stacked in order from top to bottom. Each of the first to fourth header units 110, 120, 130 and 140 is formed in a ring or a cylindrical shape, and a flow path through which a fluid can flow is formed in the header, thereby guiding the fluid introduced into the header to rotate along the circumferential direction can do. The header may be formed in a rectangular cross-sectional shape. However, the size of each header may be different from each other.

The first-stage header 110 may share a portion of the entrance area 101 and the exit area 103. The first stage header 110 is arranged to cover the top of the inlet area 101 and the outlet area 103 and one side of the first stage header 110 is disposed in contact with the reactor vessel 11, The other side of the header 110 may be disposed in contact with the core support barrel 13. In addition, the outer side and the inner side, which are formed on the outer side and the inner side in the radial direction of the first-stage header 110, respectively, can be arranged to overlap with the entrance area 101 and the exit area 103 in the vertical direction. An inlet channel 111 is formed at the bottom of the outer side of the first stage header 110 so that the reactor coolant flowing into the inlet region 101 can be introduced into the first stage header 110 through the inlet channel 111 . The inlet channel 111 may be formed in an arc shape along one area. A plurality of emission holes 112 may be formed on the bottom of the inner side of the first-stage header 110. The plurality of discharge holes 112 may be spaced apart in a zigzag fashion in two rows along the circumferential direction with a uniform spacing. The discharge holes 112 may be configured to have different sizes depending on positions in order to relatively uniformly distribute the flow rate while reducing the flow path resistance. Although the discharge hole 112 is shown as a circular shape, it is not limited to a circular shape. According to this, the first header induces the fluid flowing through the inlet channel 111 to rotate along the circumferential direction, and the discharge hole 112 can divide the flow rate distribution and discharge the fluid relatively uniformly. Here, the reactor coolant may flow vertically upward into the interior of the first end header 110 through the inlet flow passage 111 and outwardly into the outlet region 103 through the discharge hole 112 .

The second-stage header 120 has a rectangular cross-section whose transverse length is shorter than that of the first-stage header 110 and whose vertical length is longer than that of the first- The second end header 120 may be coupled such that the upper end of the rectangular cross section is in contact with the center of the rectangular cross section of the first end header 110. A plurality of inlet flow passages 121 communicating with the inlet region 101 are formed on one side of the second header 120 and four inlet flow passages 121 are formed in the second region 11b . A plurality of discharge holes 122 communicating with the outlet region 103 may be arranged on the other side of the second-stage header 120 at regular intervals in two rows along the circumferential direction. The plurality of emission holes 122 may be arranged in a zigzag fashion on the upper and lower portions of the second-stage header 120. The reactor coolant flows into the second stage header 120 through the inlet flow passage 121 in the inlet region 101 and rotates in the circumferential direction along the interior of the second stage header 120, A uniform flow distribution can be achieved through the discharge hole 122. [ At this time, the flow direction of the reactor coolant flowing into and out of the second-stage header 120 is radially inward.

The third stage header 130 is laminated on the lower side of the second stage header 120, and the other configuration is the same as or similar to the second stage header 120, and thus a detailed description thereof will be omitted.

The fourth-stage header 140 may be formed to have a pentagonal cross-sectional shape, and may be stacked on the lower side of the third-stage header 130. The fourth-level header 140 may be configured to share a portion of the entrance area 101. [ The fourth-stage header 140 may be disposed so as to overlap with the entrance area 101 in the vertical direction. An inlet channel 111 communicating with the inlet region 101 is formed on the upper surface of the fourth-stage header 140. The inlet channel 111 may be formed in an arc shape in the third zone 11c (see FIG. 5). The inclined portion 143 is formed so as to be inclined downward so that the width becomes narrower toward the downward direction and the inclined portion 143 is formed in the inclined portion 143 in the exit area 103. [ A plurality of discharge holes 142 communicating with the discharge port 103 are formed. The plurality of discharge holes 142 may be arranged in a zigzag manner in two rows along the circumferential direction with a uniform spacing. Here, the reactor coolant may be discharged in an oblique direction toward the outlet region 103 through the discharge hole 142 of the fourth-stage header 140. According to this, the reactor coolant can reduce the flow resistance at the time of joining in the outlet region 103 through the discharge hole 142, thereby reducing the flow path resistance.

The operation characteristics of the nuclear power plant according to the present embodiment will be described.

When the reactor coolant is introduced into the steam generator 16 of a train whose performance has deteriorated due to various causes, the heat transfer in the steam generator 16 is reduced so that the relatively high temperature reactor coolant is introduced into the outlet pipe 16b.

When the reactor coolant flows into the steam generator 16 of another normal train, the heat transfer occurs normally in the steam generator 16 and the reactor coolant (hereinafter referred to as fluid) at a relatively low temperature as compared with the steam generator 16, And may be discharged to the outlet pipe 16b of the generator 16. [

The high temperature fluid flows into the allocated header 110,120,130,140 and is uniformly distributed along the circumferential direction in the circumferential direction along the internal flow path of the header 110,120,130,140 so that the radius is uniformly distributed through the discharge holes 112,122,132, Direction (horizontal), vertical direction, or oblique direction.

The low-temperature fluid flows into the other headers 110, 120, 130 and 140 and is uniformly distributed along the circumferential direction in the circumferential direction along the internal flow path of the headers 110, 120, 130 and 140. Through the discharge holes 112, 122, May be subdivided and radiated in the radial direction (horizontal), vertical direction, or oblique direction.

The subdivided high temperature or low temperature fluid rapidly lowers along the outlet region 103 while contacting with the low temperature or high temperature fluid which is subdivided and discharged from the other header of the lower portion, the contact area between the two fluids rapidly increases and the mixing efficiency is greatly increased.

The fluid that has passed through the flow mixing apparatus of the present invention is passed through the lower flow path of the outlet region 103 and the lower reactor cavity and a more mixed and relatively uniform temperature fluid is introduced into the core 12 inlet.

Therefore, by sharing some of the headers 110 and 140 with the entrance area 101 or the exit area 103, the header 110 and 140, the entrance area 101 and the exit area 103 can secure a wider flow path , The flow resistance of the flow mixing equipment can be reduced as the flow rate is generally reduced.

It is also possible to reduce the flow rate or the flow distance of the inlet region 101 or the outlet region 103 to reduce the flow resistance of the inlet region 101 or the outlet region 103. [ The decrease in the flow rate, the flow velocity or the flow distance can reduce the overall flow path resistance and alleviate the problem that the flow path resistance increases greatly when the annular space 15 of the reactor vessel 11 is small, Can be overcome.

Further, by reducing the flow resistance relatively while maintaining the mixing performance similar to the conventional flow mixing equipment, it is possible to reduce the capacity of the reactor coolant pump 14 while contributing to securing the thermal margin of the reactor core 12, Can be improved.

8 is a vertical cross-sectional view showing a header assembly 200a according to a second embodiment of the present invention. FIG. 9 is a cross-sectional view of the inlet port 211 of the first-stage header 210, 10 is an exploded view of plates D1, D2, D3 and D4 showing the ejection of the header 220, 230 and 240 and FIG. 10 is a view of the plate E showing the inlet ports 221 and 231 of the second and third header 220, FIG. 11 is a horizontal sectional view of the plate A showing the inlet hole 2011 of the inlet region 201 connected to the discharge portion of the zone-specific steam generator in FIG. 8, and FIG. Is a horizontal sectional view of the plates B1 and B2 showing the discharge hole 212 and the inlet downflow passage 2012 of the inlet area 201 and Fig. 13 is a horizontal sectional view of the plate C (b) showing the inlet flow passage 241 of the fourth- 14 is a horizontal sectional view showing a section of the third-stage header 230 in Fig.

The flow mixing equipment 200 of this embodiment differs from the header assembly 200a of the first embodiment in that it is installed in an integrated reactor.

The plurality of steam generators may be arranged in the reactor vessel 11 along the circumferential direction. The discharge portion of the steam generator may be formed one per zone.

The header assembly 200a is disposed under the plurality of steam generators. The reactor coolant discharged from the plurality of steam generators may be introduced into the upper portion of the header assembly 200a. The header assembly 200a includes an entrance area 201, an exit area 203, and first through fourth ends 210, 220, 230, 240.

The entrance area 201 may be formed on the top and inner sides of the header assembly 200a. A plurality of inlet holes 2011 are formed on the upper surface of the inlet region 201 so as to be spaced apart in the circumferential direction and the outlet tube of the steam generator is connected to be communicated with the plurality of inlet holes 2011, Fluid can be introduced into the inlet region 201. The inlet hole 2011 may be formed in a circular shape.

The inlet region 201 is an area where the fluid introduced from each of the four train steam generators is distributed to each header. The upper entrance area 201a can be divided into four zones by a plurality of inlet / outlet plates 202. In each zone, a plurality of steam generators can be assigned to one batch (TRAIN). The fluid introduced from each train of the steam generator may be introduced from the assigned header. For example, one train may be referred to as a first stage header 210, two trains may be referred to as a second stage header 220, three trains may be referred to as a fourth stage header 240, four trains may be referred to as a third stage header 230, Lt; / RTI > The connection of the train and the header can be selectively combined depending on the characteristics of the reactor and the steam generator. The fluid introduced from the steam generator of one train (zone) may flow into the first stage header 210 from the upper inlet area 201a. The upper inlet region 201a and the lower inlet region 201b may be partitioned by plate B2. A plurality of inlet downflow channels 2012 are formed in the plate B2 along the circumferential direction in the second to fourth zones 11b, 11c and 11d except for the first zone 11a so that the fluid flows into the upper inlet zone 201a, May flow into the lower inlet region 201b through the inlet downflow channel 2012. [ The fluids introduced from the steam generators of the second to fourth trains may flow into the second-stage to fourth-stage header 240 along the lower inlet area 201b.

The exit area 203 may be formed on the outer side of the header assembly 200a. The upper end of the outlet region 203 is blocked by the first end header 210 and the lower end of the outlet region 203 is opened so that the reactor coolant is lowered from the lower portion of the header assembly 200a toward the lower portion of the core 12 can do.

Each of the plurality of headers 210, 220, 230 and 240 is formed in an annular structure, and the fluid introduced into each header is uniformly distributed along the circumferential direction in the circumferential direction along the annular flow path in the header 210, 220, , Vertical, or diagonal directions.

The first-stage header 210 may be formed using a portion of the exit area 203. The first-stage header 210 may be disposed such that the upper portion of the inner surface thereof is inscribed with the outer side surface of the entrance area 201. A portion of the first end header 210 may be disposed radially superimposed on the upper entrance area 201a. A plurality of inlet flow passages 211 may be spaced apart in the circumferential direction on the inner surface of the first end header 210 in contact with one region of the inlet region 201. 9 shows seven entrance flow passages 211 formed on the inner side (plate D1) of the first-stage header 210. In Fig. The inlet flow passage 211 is formed only on the inner side of the first end header 210 facing the first region of the inlet region 201 and the inlet flow passage 211 is not formed on the remaining inner side, The fluid introduced from the generator flows only into the first stage header 210. The flow direction of the fluid flowing into the first-stage header 210 is radially outward. The outer surface of the first-stage header 210 may be disposed in contact with the inner surface of the reactor vessel 11. A plurality of emission holes 212 may be formed in the bottom surface of the first-stage header 210 so as to communicate with the outlet region 203. The plurality of discharge holes 212 may be spaced apart in a zigzag manner in two rows along the circumferential direction at uniform intervals.

The second end header 220 may be disposed below the upper entrance area 201a and the upper side of the outer side may be disposed to be inscribed with the lower inner side surface of the first end header 210. [ That is, the upper portion of the second-stage header 220 may be radially overlapped with the first-end header 210. A plurality of inlet flow passages 221 may be formed in the second area of the inner surface of the second header 220 so as to communicate with the lower inlet area 201b. The inlet channel 221 is formed in a circular shape, but is not limited thereto. A plurality of discharge holes 222 are formed in the upper part of the plate D2 forming the outer surface of the second stage header 220 so as to communicate with the outlet area 203 toward the outlet area 203, Can be spaced apart in a zigzag fashion.

The third-stage header 230 may be disposed at the lower portion of the second-stage header 220 and radially overlap the lower inlet region 201b and the outlet region 203. [ A plurality of inlet flow passages 231 may be formed in the fourth section 11d of the inner side surface of the third-stage header 230 so as to communicate with the lower inlet area 201b. The inlet flow passage 231 is formed in a circular shape, but is not limited thereto. A plurality of discharge holes 232 are formed in a lower portion of the plate D2 forming the outer surface of the third stage header 230 so as to communicate with the outlet region 203 toward the outlet region 203, Can be spaced apart in a zigzag fashion.

The fourth-stage header 240 is disposed under the third-stage header 230, and may be disposed so as to overlap with the lower-entrance area 201b in the vertical direction. The fourth-level header 240 is configured to share a portion of the lower entrance area 201b. The fourth-stage header 240 may have a pentagonal cross-sectional shape. The fourth-stage header 240 may be partitioned by the plate C into a lower entrance area 201b and a third-stage header 230. [ A plurality of inlet flow passages 241 may be formed in the plate C. The plurality of inlet flow passages 241 may be formed in a circular shape and may be formed on a plate C facing the bottom surface of the third zone of the lower inlet area 201b in the vertical direction. The fluid may flow along the lower inlet region 201b and into the interior of the fourth stage header 240 through the inlet flow passage 241 in the third region.

Plates D3 and D4 are disposed on the outer side of the fourth-stage header 240, the plate D3 extends in the vertical direction in the third-stage header 230, and the plate D4 (slope) And may be formed to be downwardly inclined so that the width becomes narrower toward the direction. A plurality of discharge holes 242 may be formed in the plate D4 in a zigzag form in two rows along the circumferential direction. The fluid discharged through the discharge hole 242 may be injected in an oblique direction with respect to the outlet region 203. In this case, the fluid discharged from the fourth-stage header 240 can reduce the flow velocity when the fluid flows down along the outlet region 203, thereby reducing the flow path resistance.

The discharge holes 212, 222, 232 and 242 of the respective headers 210, 220, 230 and 240 are subdivided at uniform intervals along the circumferential direction of the header 210, 220, 230 and 240 and are formed to have a proper flow resistance to achieve a relatively uniform flow distribution.

The flow direction of the fluid flowing into the first end header 210 from the upper inlet region 201a is radially outward and the flow direction of the fluid discharged from the first end header 210 is the downward perpendicular direction.

In the case of the second-stage and third-stage header 230, it can flow in and out in the radial direction.

The fourth-stage header 240 may emit fluid in a radially out-of-diagonal direction. The flow direction of the fluid discharged from the first stage header 210 and the flow direction of the second stage header 220 may be perpendicular to each other to increase the mixing efficiency. In addition, the flow path resistance of the header 210, 220, 230, 240 and the inlet / outlet regions 201, 203 can be increased by reducing the flow path resistance. The other components are the same as or similar to those of the first embodiment, and a detailed description thereof will be omitted.

15 is a conceptual diagram showing a flow mixing facility 300 according to a third embodiment of the present invention.

The flow mixing apparatus 300 of the present embodiment includes a four-stage header assembly 300a installed in the modular reactor 10. In contrast to the first embodiment, the inner side of the first- 303 so as to share the exit area 303 more. At this time, the cross-sectional shape of the first-end header 310 may be "a ". The other components are the same as or similar to those of the first embodiment, and a detailed description thereof will be omitted.

16 is a conceptual diagram showing a flow mixing facility 400 according to a fourth embodiment of the present invention.

The flow mixing equipment 400 of this embodiment includes a four-stage header assembly 400a installed in an integral nuclear reactor, and has the following differences in comparison with the second embodiment.

First, the entrance area 401 and the exit area 403 may be reversed. The inlet region 401 may be disposed on the outer side of the header assembly 400a and the outlet region 403 may be disposed on the inner side of the header assembly 400a.

Second, the first-tier header 410 may be configured to share an entrance area 401 and an exit area 403. In particular, the inner portion of the first-stage header 410 may extend further to the top of the outlet region 403 to share more of the outlet region 403.

Third, the fourth-stage header 440 may extend longer than the slanted portion 443 to increase the diagonal length of the fourth-stage header 440.

Other components are the same as or similar to those of the second embodiment, and therefore, detailed description thereof will be omitted.

17 is a conceptual diagram showing a flow mixing equipment 500 according to a fifth embodiment of the present invention.

The flow mixing equipment 500 of this embodiment includes a two-stage header assembly 500a installed in a modular reactor. The fluid discharged from the plurality of steam generators can be introduced into the side of the flow mixing equipment 500. The first-stage header 510 may be configured to share an entrance area 501 and an exit area 503. The first stage header 510 may be configured such that the inflow of fluid is directed vertically upward and the outflow of fluid is directed downward. The second stage header 520 may be configured such that the inflow and outflow of fluid may be radially inward of the header assembly 500a.

18 is a conceptual diagram showing a flow mixing facility 600 according to a sixth embodiment of the present invention.

The flow mixing plant 600 of this embodiment includes a two-stage header assembly 600a installed in a modular reactor. The first stage header 610 may be configured such that the inflow and outflow of fluid may be radially inward of the header assembly 600a. The second-tier header 620 may be configured to share an entry area. The second-stage header 620 may be configured such that the inflow of the fluid is in the vertical downward direction and the outflow of the fluid is in the inner oblique direction. The other components are the same as or similar to those of the fifth embodiment, and a detailed description thereof will be omitted.

19 is a conceptual diagram showing a flow mixing equipment 700 according to a seventh embodiment of the present invention.

The flow mixing equipment 700 of this embodiment includes a three-stage header assembly 700a installed in a modular reactor. The first stage header 710 may be configured to share an entrance area 701 and an exit area 703.

The second stage header 720 may be configured such that the inflow and outflow of fluid may be radially inward of the header assembly. The third-tier header 730 may be configured to share an entry area. The third stage header 730 may be configured such that the inflow of the fluid is in a vertically downward direction and the outflow of fluid is in an inner oblique direction. The other components are the same as or similar to those of the fifth or sixth embodiment, and a detailed description thereof will be omitted.

In each of the above-described embodiments, the flow mixing equipment is applied to a reactor of either a modular reactor or an integral reactor. However, the present invention can be applied to two furnaces according to the configuration.

It will be apparent to those skilled in the art that various modifications, substitutions and alterations can be made hereto without departing from the spirit and scope of the invention as defined by the appended claims. will be.

10: Modular reactors
11: Reactor vessel
11a: Zone 1
11b: Zone 2
11c: Zone 3
11d: Zone 4
12: Core
13: Core support barrel
14: reactor coolant pump
15: Annular space
16: Steam generator
16a: inlet pipe
16b: outlet pipe
17: Water system
17a: Isolation valve
18: Turbine system
18a: Isolation valve
100, 200, 300, 400, 500, 600, 700:
100a, 200a, 300a, 400a, 500a, 600a, 700a:
101, 201, 301, 401, 501, 601, 701:
201a, 301a, 401a: upper inlet region
201b, 301b, 401b: Lower inlet area
2011: Inflow hole
2012: Down the entrance Euro
102, 202, 302, 402, 502,
103, 203, 303, 403, 503, 603, 703:
110, 210, 310, 410, 510,
111: inlet channel
211: inlet port
112, 212, 312, 412, 512,
120,220,320,420,520,620,720: Second-level header
121,221: Inlet port
122, 222, 322, 422, 522, 622, 722:
130,230,330,430,730: Third-level header
131, 231:
132, 232, 432, 432, 732:
140,240,340,440: Fourth header
141: inlet channel
242: inlet port
142, 242, 342, 442:
143:
A, B, B1, B2, C, D1, D2, D3, D4: plate

Claims (22)

And a header assembly for mixing the reactor coolant supplied from each of the plurality of steam generators and discharging the nuclear coolant into a core,
The header assembly comprising:
An inlet region through which the reactor coolant is introduced;
An outlet region for discharging said mixed reactor coolant to said core;
A plurality of headers disposed between the inlet region and the outlet region and vertically stacked to mix the reactor coolant introduced through the inlet region;
Wherein at least one of the plurality of headers shares a portion of the entry area or the exit area,
The plurality of headers are installed inside the reactor vessel, and are formed by stacking first to n-th stage headers (n is a natural number of 2 or more)
Wherein a portion of the first-stage header overlaps the inlet region and the outlet region in a vertical direction, and a portion of the n-th header overlaps the inlet region. The method according to claim 1,
Said at least one header sharing a portion of said inlet region and said outlet region. delete delete And a header assembly for mixing the reactor coolant supplied from each of the plurality of steam generators and discharging the nuclear coolant into a core,
The header assembly comprising:
An inlet region through which the reactor coolant is introduced;
An outlet region for discharging said mixed reactor coolant to said core;
A plurality of headers disposed between the inlet region and the outlet region and vertically stacked to mix the reactor coolant introduced through the inlet region;
Wherein at least one of the plurality of headers shares a portion of the entry area or the exit area,
The plurality of headers are installed inside the reactor vessel, and are formed by stacking first to n-th stage headers (n is a natural number of 2 or more)
Wherein a portion of the first-stage header overlaps with the outlet region in a vertical direction, and a portion of the n-th header overlaps with the inlet region. The method according to claim 1,
Said at least one header discharging said reactor coolant in a direction different from the other header. The method according to claim 1,
Said at least one header discharging said reactor coolant in a vertically downward direction. The method according to claim 1,
Said at least one header discharging said reactor coolant in a horizontal or oblique direction. The method according to claim 1,
Wherein the plurality of steam generators are arranged along the circumferential direction on the outside of the reactor vessel. 10. The method of claim 9,
Wherein the reactor coolant supplied from the plurality of steam generators flows into the inlet region through the side of the reactor vessel. The method according to claim 1,
Wherein the plurality of steam generators are disposed along the circumferential direction inside the reactor vessel. 12. The method of claim 11,
Wherein said inlet region is disposed below said plurality of steam generators and said reactor coolant is flowed downwardly from said plurality of steam generators into said inlet region. The method according to claim 1,
Wherein each of the plurality of the headers is formed in an annular structure, an inlet channel is formed at one side of each of the plurality of the header, and a fluid introduced into each header through the inlet channel flows along the circumferential direction Flow mixing equipment. 14. The method of claim 13,
Wherein a plurality of discharge portions are disposed on the other side of each of the plurality of the headers at regular intervals along the circumferential direction, and the reactor coolant is sprayed. 15. The method of claim 14,
Wherein each of the plurality of discharge portions is formed in a circular or narrow flow path shape. 15. The method of claim 14,
Wherein the plurality of discharge portions are arranged in upper and lower rows, and the upper row and lower row are arranged in a zigzag form with respect to each other. 15. The method of claim 14,
Wherein the direction of injection of fluid ejected through the plurality of outlets is in the direction from the outer side of the reactor vessel to the center or from the center of the reactor vessel to the outer side of the reactor vessel. And a header assembly for mixing the reactor coolant supplied from each of the plurality of steam generators and discharging the nuclear coolant into a core,
The header assembly comprising:
An inlet region through which the reactor coolant is introduced;
An outlet region for discharging said mixed reactor coolant to said core;
A plurality of headers disposed between the inlet region and the outlet region and vertically stacked to mix the reactor coolant introduced through the inlet region;
Wherein at least one of the plurality of headers shares a portion of the entry area or the exit area,
And a plurality of inlet / outlet plates partitioned into a plurality of sections along the circumferential direction of the reactor vessel are provided in the inlet region so as to be spaced apart from each other. 19. The method of claim 18,
Wherein a plurality of steam generators are installed in each of the plurality of zones. 19. The method of claim 18,
Wherein one header is assigned to each of the plurality of zones. The method according to claim 1,
Wherein one header is assigned to each of the plurality of steam generators. A reactor vessel having a core inside;
A plurality of steam generators installed inside or outside the reactor vessel;
A header assembly installed in the reactor vessel and mixing the reactor coolant supplied from the plurality of steam generators and discharging the reactor coolant into the reactor;
Lt; / RTI >
The header assembly comprising:
An inlet region through which the reactor coolant is introduced;
An outlet region for discharging said mixed reactor coolant to said core;
A plurality of headers disposed between the inlet region and the outlet region and vertically stacked to mix the reactor coolant introduced through the inlet region;
Wherein at least one of the plurality of headers shares a portion of the entry area or the exit area,
The plurality of headers are installed inside the reactor vessel, and are formed by stacking first to n-th stage headers (n is a natural number of 2 or more)
Wherein a portion of the first-stage header overlaps with the entrance region and the exit region in a vertical direction, and a portion of the n-th header overlaps the entrance region.

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