CN114639493A - Water distribution device for passive containment cooling system test equipment - Google Patents
Water distribution device for passive containment cooling system test equipment Download PDFInfo
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- CN114639493A CN114639493A CN202210095941.2A CN202210095941A CN114639493A CN 114639493 A CN114639493 A CN 114639493A CN 202210095941 A CN202210095941 A CN 202210095941A CN 114639493 A CN114639493 A CN 114639493A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 312
- 238000001816 cooling Methods 0.000 title claims abstract description 54
- 238000012360 testing method Methods 0.000 title claims abstract description 41
- 239000000498 cooling water Substances 0.000 claims abstract description 30
- 230000001105 regulatory effect Effects 0.000 claims description 15
- 238000011160 research Methods 0.000 abstract description 6
- 230000035945 sensitivity Effects 0.000 abstract description 4
- 238000005192 partition Methods 0.000 description 10
- 238000011056 performance test Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
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- 239000007921 spray Substances 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C15/00—Cooling arrangements within the pressure vessel containing the core; Selection of specific coolants
- G21C15/18—Emergency cooling arrangements; Removing shut-down heat
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The invention provides a water distribution device for passive containment cooling system test equipment, which comprises a water supply main pipe, a water distribution box, a plurality of guide pipes, a plurality of water distribution pipes and a plurality of weir grooves. The water distribution box limits a first annular water distribution cavity and a plurality of second water distribution cavities distributed along the circumferential direction of the first water distribution cavity, a water outlet of a water supply main pipe is movably arranged along the circumferential direction so as to correspond to the second water distribution cavities one by one, a plurality of second water distribution cavities are respectively corresponding to different combinations and different numbers of water distribution pipes, various water film covering forms can be realized, continuous adjustment can be realized in one test working condition, only one adjusting valve for controlling the flow of the water supply main pipe is needed, a branch adjusting valve is not needed to be arranged, the structure is simple, the economy is good, decoupling control between cooling water flow and water film covering rate can be realized, the control target of constant flow and variable covering rate is realized, and a technical basis is provided for sensitivity test research of the covering rate.
Description
Technical Field
The invention relates to the field of pressurized water reactor passive containment test research, in particular to a water distribution device for passive containment cooling system test equipment.
Background
The passive containment cooling system (PCS) is one of the important proprietary safety systems of passive safety advanced nuclear power plants. The comprehensive performance test of the passive containment cooling system is carried out, and the key link of the development process of reactor type research and development design of the passive safe advanced pressurized water reactor nuclear power station and related containment special design software is developed. Response curves of temperature, pressure and the like of the simulated containment vessel are obtained by establishing steam spraying conditions under different simulated accident conditions and corresponding water film covering conditions (different covering forms and water film covering rates) outside the test shell. Theoretical analysis and test results show that under the same steam blowing condition and other boundary conditions, the influence of the coverage rate and the flow rate of cooling water on the pressure curve and the temperature trend in the containment shell is very obvious. Therefore, the control of the coverage rate and the flow of the simulated out-of-containment cooling water film is one of the important boundary conditions and control targets of the comprehensive performance test of the passive containment cooling system, and is also one of the key points and difficulties of the test. A cooling water loop of a water distribution device for passive containment cooling system test equipment in the related art is complex, more regulating valves are needed, the cost is high, and the economical efficiency is poor.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the embodiment of the invention provides the water distribution device for the passive containment cooling system test equipment, which is low in cost and good in economic performance.
The water distribution device for the passive containment cooling system test equipment provided by the embodiment of the invention comprises a water supply main pipe; the water distribution box is positioned at the top of the containment and defines an annular first water distribution cavity and a plurality of second water distribution cavities distributed along the circumferential direction of the first water distribution cavity, the water outlet of the main water supply pipe is movably arranged along the circumferential direction so as to correspond to the second water distribution cavities one by one, a plurality of water outlets are arranged at the bottom of the first water distribution cavity, the first water distribution cavity is communicated with one of the second water distribution cavities, and the rest of the second water distribution cavities are communicated with at least one guide pipe; the plurality of water distribution pipes are radially distributed by taking the water distribution box as a center, the plurality of water distribution pipes correspond to the plurality of water outlets one by one, and the plurality of guide pipes correspond to at least one part of the plurality of water distribution pipes; a plurality of weir grooves, the weir groove is followed circumference extends, and is a plurality of the weir groove one-to-one sets up the low reaches that are used for distributing cooling water at a plurality of distributive pipes, every the weir groove is provided with along its extending direction interval distribution's a plurality of discharge outlets, cooling water in the weir groove passes through the discharge outlet overflows.
The water distribution box of the water distribution device for the passive containment cooling system test equipment, provided by the embodiment of the invention, is provided with the plurality of second water distribution cavities, when the comprehensive performance test is carried out on the cooling system, the plurality of second water distribution cavities can respectively correspond to different combinations and different numbers of water distribution pipes, various water film covering forms can be realized, continuous adjustment can be realized in one test working condition, only one adjusting valve for controlling the flow of a main water supply pipe is needed, a branch adjusting valve is not needed, the structure is simple, the economical efficiency is good, decoupling control between the cooling water flow and the water film covering rate can be realized, the control targets of constant flow and variable covering rate are realized, and a technical basis is provided for sensitivity test research of the covering rate.
In some embodiments, the water dispensing device further comprises a rotating shaft and a rotating bracket capable of rotating around the rotating shaft, and the main water supply pipe is arranged on the rotating bracket so that the rotating bracket drives the main water supply pipe to rotate along the circumferential direction.
In some embodiments, the water dispensing apparatus further comprises a drive motor having a drive gear, and the rotatable bracket comprises a driven gear, the drive gear engaging the driven gear to rotate the rotatable bracket.
In some embodiments, a plurality of the second water diversion chambers are arranged around the first water diversion chamber.
In some embodiments, the water distribution apparatus includes a plurality of baffles disposed between two adjacent weir troughs and extending along a surface of the containment vessel to divide the containment vessel surface into a plurality of cooling zones.
In some embodiments, the number of the cooling areas corresponding to each of the second water diversion chambers is different.
In some embodiments, the number of the water distribution pipes is N, where N is a multiple of 8, one of the second water distribution chambers corresponds to N/2 of the water distribution pipes one to one through N/2 of the guide pipes, the other second water distribution chamber corresponds to N/4 of the water distribution pipes one to one through N/4 of the guide pipes, the other second water distribution chamber corresponds to N/8 of the water distribution pipes one to one through N/8 of the guide pipes, and the other second water distribution chamber is communicated with the first water distribution chamber.
In some embodiments, the water dispensing apparatus includes a regulating valve provided on the water supply main for regulating the flow rate of the water supply main.
In some embodiments, a plurality of the weir troughs are connected in sequence to surround the containment vessel for a circle.
In some embodiments, the position of the water outlet of the guide pipe is adjustable so that the guide pipe and the plurality of the distributive pipes can be correspondingly arranged.
Drawings
Figure 1 is a schematic view of a water dispensing apparatus in an embodiment of the present invention.
Figure 2 is a top view of a water dispensing apparatus in an embodiment of the present invention.
Fig. 3 is a partial schematic view of fig. 2.
Fig. 4 is a partial schematic view of fig. 3.
Fig. 5 is a partial schematic view of fig. 4.
Figure 6 is a front view of a water dispensing apparatus in an embodiment of the present invention.
Fig. 7 is a schematic structural view of a weir trough in an embodiment of the invention.
Reference numerals:
the water distribution box comprises a water distribution box 1, a first water distribution cavity 11, a water outlet 111, a second water distribution cavity 12, an inner shell 13, a middle shell 14, an outer shell 15, a partition plate 16, a guide pipe 2, a water distribution pipe 3, a water collection port 31, a weir notch 4, a drainage port 41, a rotating shaft 51, an emptying pipe 511, a rotating support 52, a mounting hole 521, a driving motor 53, a partition plate 6 and a cooling area 61.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The basic structure of the water distribution device for the passive containment cooling system scale-down test stand equipment provided by the invention is described below according to figures 1-7. The water distribution device is used for providing cooling water for the area of the containment except the top for cooling. The water distribution device includes a water supply main (not shown in the drawings), a water distribution box 1, a plurality of guide pipes 2, a plurality of water distribution pipes 3, and a plurality of weir grooves 4.
The water distribution box 1 is arranged at the top of the simulated containment, the water distribution box 1 defines a first annular water distribution cavity 11 and a plurality of second water distribution cavities 12, and the plurality of second water distribution cavities 12 are distributed along the circumferential direction of the first water distribution cavity 11. The water outlet of the main water supply pipe is movably arranged along the circumferential direction of the first water diversion cavity 11 so as to correspond to the plurality of second water diversion cavities 12 one by one. The water supply main pipe is used for flowing cooling water into the corresponding second water diversion cavity 12 from the water outlet thereof.
The first water distribution cavity 11 is communicated with one of the second water distribution cavities 12, and a plurality of water outlets 111 are arranged at the bottom of the first water distribution cavity 11. When the second water-dividing cavity 12 communicated with the first water-dividing cavity 11 corresponds to the main water supply pipe, the cooling water enters the annular first water-dividing cavity 11 through the second water-dividing cavity 12 and flows out from the water outlet 111 at the bottom of the first water-dividing cavity 11. The rest of the second water-dividing chambers 12 except the second water-dividing chamber 12 communicated with the first water-dividing chamber 11 are communicated with at least one guide pipe 2, and the cooling water in the second water-dividing chambers 12 flows out through the guide pipes 2 corresponding to the second water-dividing chambers 12.
The plurality of water distribution pipes 3 are radially distributed by taking the water distribution box 1 as a center. As shown in fig. 1, a plurality of distribution pipes 3 are distributed around the distribution box 1 at intervals and extend outward in a radial shape. The plurality of water distribution pipes 3 correspond to the plurality of water outlets 111 one by one, and the cooling water in the first water distribution cavity 11 flows into the water distribution pipes 3 after flowing out from the water outlets 111 at the bottom and flows along the water distribution pipes 3.
The plurality of guide pipes 2 correspond to at least a part of the plurality of knock out pipes 3. The cooling water in the second water diversion chamber 12 flows into the corresponding water diversion pipe 3 through the corresponding guide pipe 2 and flows along the water diversion pipe 3. It should be noted that one water diversion pipe 3 may correspond to a plurality of guide pipes 2; only part of the diversion pipe 3 may correspond to the guide pipe 2, which is not limited in the present application.
The weir grooves 4 extend along the circumferential direction of the first water diversion chamber 11, and the plurality of weir grooves 4 are provided downstream of the plurality of water diversion pipes 3 in a one-to-one correspondence for distributing cooling water. It will be understood that the flow direction of the cooling water in the knock out pipe 3 is a direction away from the knock out box, that is, the downstream end of the knock out pipe 3 is an end thereof away from the knock out pipe 3. As shown in fig. 7, each weir notch 4 is provided with a plurality of drain holes 41 arranged at intervals along the extending direction thereof, and the cooling water in the weir notch 4 uniformly overflows through the drain holes, thereby forming a water film for cooling covering the containment vessel.
The water distribution box of the water distribution device for the passive containment cooling system test equipment, provided by the embodiment of the invention, is provided with the plurality of second water distribution cavities, when the comprehensive performance test is carried out on the cooling system, the plurality of second water distribution cavities can respectively correspond to different combinations and different numbers of water distribution pipes, various water film covering forms can be realized, continuous adjustment can be realized in one test working condition, only one adjusting valve for controlling the flow of a main water supply pipe is needed, a branch adjusting valve is not needed, the structure is simple, the economical efficiency is good, decoupling control between the cooling water flow and the water film covering rate can be realized, the control targets of constant flow and variable covering rate are realized, and a technical basis is provided for sensitivity test research of the covering rate.
One embodiment of the present invention is described in detail below with reference to fig. 1-7.
As shown in fig. 1, the water distribution device comprises a main water supply pipe, a water distribution box 1, a plurality of guide pipes 2, eight water distribution pipes 3, eight weir grooves 4 and eight partition plates 6. The water dispensing device further comprises a regulating valve for regulating the flow rate of said water supply main.
The partition plates 6 are arranged between two adjacent weir grooves 4 and extend along the surface of the simulated containment vessel to divide the surface of the simulated containment vessel into a plurality of cooling zones 61. The cooling water flows downwards along the containment vessel after overflowing from the weir grooves 4, and forms a uniform water film in the corresponding cooling area 61. The partition 6 is used to partition the cooling region 61. Preferably, the baffle 6 equally divides the simulated containment surface into a plurality of cooling zones 61.
As shown in fig. 3 to 5, the water diversion box 1 defines an annular water diversion chamber 11 and four second water diversion chambers 12, and the four second water diversion chambers 12 are arranged around the first water diversion chamber 11. Specifically, as shown in fig. 5, the water distribution box 1 includes an inner shell 13, a middle shell 14, an outer shell 15, and a bottom shell, and the inner shell 13, the middle shell 14, and the outer shell 15 are connected to the top of the bottom shell and extend upward. The inner shell 13, the middle shell 14 and the outer shell 15 are sequentially sleeved from inside to outside and are spaced from each other, a first water distribution cavity 11 is formed between the inner shell 13 and the middle shell 14, a plurality of partition plates 16 are arranged between the outer shell 15 and the middle shell 14 to form four second water distribution cavities 12, and the partition plates 16 are spaced between the adjacent second water distribution cavities 12. The top ends of the first water dividing cavity 11 and the second water dividing cavity 12 are both open. In other embodiments, the top end of the first water diversion chamber 11 can be closed.
It is understood that in other embodiments, the number of the second water diversion cavities 12 may be other, and several second water diversion cavities 12 may be located inside the first water diversion cavity 11 and distributed along the circumference of the first water diversion cavity 11.
In order to enable the water outlet of the water main to be movably arranged in the circumferential direction of the first water distribution chamber 11 so as to be able to correspond to a different second water distribution chamber 12. The water distribution device in this embodiment further includes a rotating shaft 51 and a rotating bracket 52, the rotating bracket 52 can rotate around the rotating shaft 51, the water supply branch pipe is arranged on the rotating bracket 52, and the rotation of the rotating bracket 52 can drive the water supply main pipe to rotate along the circumferential direction of the first water diversion cavity 11. Preferably, the main water supply pipe is a flexible pipe.
Specifically, as shown in fig. 1 and 6, the water distribution device comprises an emptying pipe 511, the emptying pipe 511 is arranged at the top of the safety shell, a rotating shaft 51 is arranged at the top of the emptying pipe 511, and the rotating shaft 51 and a rotating bracket 52 form a rotating pair through a bearing. As shown in fig. 3, the rotating bracket 52 is shaped like a fan, and has a mounting hole 521 for mounting a main water supply pipe. The mounting hole 521 corresponds to a circumference where the second water distribution chamber 12 is located in the up-down direction so that the cooling water can accurately flow into the corresponding second water distribution chamber 12 from the water outlet of the water supply main pipe.
The water dispensing device further comprises a drive motor 53 for driving the rotary bracket 52, the drive motor 53 being provided with a drive gear, the rotary bracket 52 comprising a driven gear, the drive gear engaging the driven gear so as to drive the rotary bracket 52 in rotation. As shown in fig. 6, in the present embodiment, a drive motor 53 is provided on the top of the evacuation pipe 511. The driving motor 53 drives the rotating bracket 52 to rotate, and the rotating bracket 52 drives the water outlet of the main water supply pipe to rotate, so that the water outlet of the main water supply pipe corresponds to the second water diversion cavity 12 respectively.
As shown in fig. 3, eight water outlets 111 are disposed at the bottom of the first water diversion cavity 11, and the eight water outlets 111 are distributed at intervals along the circumference of the first water diversion cavity 11. As shown in FIG. 4, the four second water diversion cavities 12 are numbered 1-4 respectively, and the second water diversion cavities 12-4 are communicated with the first water diversion cavity 11. Optionally, the bottom of the middle shell 14 portion corresponding to the second water distribution cavity 12-4 is provided with a through hole (not shown in the figure), the through hole is communicated with the second water distribution cavity 12-4 and the first water distribution cavity 11, when the water outlet of the main water supply pipe corresponds to the second water distribution cavity 12-4, the cooling water flows into the second water distribution cavity 12-4, then flows into the first water distribution cavity 11 through the through hole, and flows out from the water outlets 111 distributed at the bottom of the first water distribution cavity 11.
As shown in fig. 3 and 4, the eight water distribution pipes 3 are radially distributed around the water distribution box 1, the top ends of the portions of the water distribution pipes 3 close to the water distribution box 1 are open to form water collection ports 31, the water outlets 111 are opposite to the corresponding water collection ports 31 in the vertical direction, and cooling water flows into the water distribution pipes 3 from the water outlets 111. In the present embodiment, the water collection port 31 has a rectangular shape.
As shown in fig. 4, eight knock out pipes 3 are numbered 1-8, respectively, in a clockwise direction. The second water diversion cavity 12-1 is communicated with four guide pipes 2-1, the four guide pipes 2-1 respectively correspond to the water diversion pipes 3-2, the water diversion pipes 3-4, the water diversion pipes 3-6 and the water diversion pipes 3-8, the water outlets of the guide pipes 2-1 are respectively positioned above the water collection ports 31 of the water diversion pipes 3 corresponding to the guide pipes, and cooling water in the second water diversion cavity 12-1 can respectively flow into the four water diversion pipes 3 through the four guide pipes 2-1. The second water diversion cavity 12-2 is communicated with the guide pipe 2-2, and the water outlet of the guide pipe 2-2 is positioned above the water collecting opening 31 of the water diversion pipe 3-1. The second water diversion cavity 13-3 is communicated with two guide pipes 2-3, and the two guide pipes 2-3 are respectively corresponding to water collecting openings of the water diversion pipes 3-4 and the water diversion pipes 3-5.
In conclusion, the water supply main pipe corresponds to the second water diversion cavity 12-1, so that water film coverage of four cooling areas 61 at intervals can be realized, namely water film coverage of the quadrant 1/2 of the simulated safety casing surface; the water supply main pipe corresponds to the second water diversion cavity 12-2, and water film coverage of the independent cooling area 61 can be realized, namely water film coverage of the quadrant of the simulated containment surface 1/8; the water supply main pipe corresponds to the second water diversion cavity 12-3, and water film covering of two adjacent cooling areas 61 can be realized, namely water film covering of 1/4 quadrants on the surface of the simulated safety shell; the water supply main pipe corresponds to the second water diversion cavity 12-4, and water film covering of the eight cooling areas 61 can be achieved, namely full-covering cooling of the surface of the simulated safety shell is achieved.
Therefore, the embodiment can conveniently realize various water film covering forms of different areas and different coverage rates under the condition of only using one regulating valve (used for regulating the main water supply pipe), and can realize continuous regulation in one test working condition without branch regulation.
It is understood that in other embodiments, the communication mode between the second diversion cavity 12 and the guide pipe 2 and the corresponding mode between the guide pipe 2 and the diversion pipe 3 can also be replaced by other modes, so as to realize other water film covering forms, and the invention is not limited to this.
For example, the number of cooling zones 61 for each second distribution chamber 12 is different. Optionally, it is assumed that the number of the water distribution pipes 3 is N, N is a multiple of 8, one of the second water distribution chambers 12 corresponds to N/2 water distribution pipes 3 one by one through N/2 guide pipes 2, and the water distribution pipes 3 may not be adjacent, another one of the second water distribution chambers 12 corresponds to N/4 water distribution pipes 3 one by one through N/4 guide pipes 2, another one of the second water distribution chambers 12 corresponds to N/8 water distribution pipes 3 one by one through N/8 guide pipes 2, and another one of the second water distribution chambers 12 is communicated with the first water distribution chamber 11.
Further, in order to make the water dispensing device provided in the present embodiment more practical, the position of the water outlet of the guide pipe 2 may be adjusted so that the guide pipe 2 may correspond to the plurality of branched pipes 3, respectively. Optionally, the guide pipe 2 is a hose, and the position of the water outlet of the guide pipe 2 is adjusted to enable the guide pipe to correspond to different water distribution pipes 3 according to working conditions, so that the corresponding mode of the second water distribution cavity 12 and the water distribution pipes 3 is adjustable, and the practicability and operability of the water distribution device are improved.
As shown in fig. 2, eight weir grooves 4 correspond to eight water distribution pipes 3 one by one, and the eight weir grooves 4 are connected in sequence and surround the containment vessel for a circle. In this embodiment, each weir notch 4 is composed of three groove bodies, the groove body section located at the middle part is perpendicular to the corresponding diversion pipe 3, the diversion pipe 3 is connected with the middle part of the groove body section, the inner side of the groove body section is provided with a through hole communicated with the water outlet of the diversion pipe 3, and the groove body sections located at the two ends and the groove body section located at the middle part form an included angle. The adjacent two weir grooves 4 are separated by a partition plate, so that the weir grooves 4 are independent from each other. Alternatively, in other embodiments, the weir trough 4 may be arcuate.
As shown in fig. 7, the outer side wall of the weir trough 4 is provided with a plurality of drainage ports 41 distributed at intervals along the extending direction thereof, and optionally, the drainage ports are V-shaped. The cooling water in the weir troughs 4 overflows through the drain ports 41 to form water films that uniformly cover the corresponding cooling areas 61.
In summary, the passive containment cooling system scaling test facility water distribution device provided by the embodiment of the invention has the following beneficial effects:
1) simple structure
The multiple water film covering forms can be conveniently realized only by one main path regulating valve, continuous regulation can be realized in one test working condition, the requirement of the passive containment cooling system comprehensive performance test is met, a branch path regulating valve is not needed, the structure of a process loop is simpler, and the arrangement of an electric system and an instrument control system of the branch path regulating valve is omitted.
2) Good economical efficiency
The regulating valve is expensive, high in installation difficulty and also needs to be provided with corresponding power supply and control lines. Compared with the prior art, the invention saves a plurality of branch regulating valves, only needs to be additionally provided with a small-power motor and a transmission device and a simple water distribution structure, and has good economical efficiency.
3) The cooling water distribution effect is good
In the embodiment of the invention, 8 distributive pipes are adopted to respectively introduce cooling water into 8 weir grooves, and a plurality of V-shaped small openings are formed on the vertical plate outside the weir grooves. The cooling water slowly flows to the surface of the simulated containment through the V-shaped small opening, and the distribution effect is more uniform and stable.
4) Decoupling control of cooling water flow and water film coverage
The embodiment of the invention can realize various water film covering forms and can realize continuous adjustment in one test working condition. The 8 cooling areas are mutually independent through devices such as a water diversion pipe, a weir groove, a partition plate and the like, decoupling control of cooling water flow and water film coverage can be realized, a control target of constant flow variable coverage is realized, and a technical basis is provided for sensitivity test research of coverage.
The passive safety is an innovative design concept, the passive containment cooling system can realize spray cooling of the pressure vessel only by means of natural force, and the technology can be applied to nuclear power plants and can be widely applied to safety protection of key pressure vessels in other thermal power plants, chemical industries and the like. When the temperature of the key pressure container is increased to cause the internal pressure to be increased, the spraying temperature reduction and depressurization can be carried out through a passive cooling system. The water distribution device provided by the embodiment of the invention can be suitable for a passive containment cooling system scaling test bench taking AP/CAP series as a prototype reactor, or a modified reactor type test bench derived from the passive containment cooling system scaling test bench.
The water distribution device designed by the invention has no direct relation with the size of the pressure container and has strong universality and expansibility, so when a cooling system is designed, the water distribution device provided by the embodiment of the invention can be adopted for experimental research, thereby obtaining an optimal design form.
Corresponding test data is also needed to be verified during the development of nuclear power design software. For corresponding containment design and analysis software, in order to verify the program function and performance of the containment cooling system, the support of the single item and comprehensive performance test data results of the containment cooling system is needed, and the test results obtained by performing the performance test by using the water distribution device provided by the embodiment of the invention can provide test data support for the verification of the related containment program.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A water distribution apparatus for passive containment cooling system test equipment, comprising:
a water supply main pipe;
the water distribution box is positioned at the top of the containment and defines an annular first water distribution cavity and a plurality of second water distribution cavities distributed along the circumferential direction of the first water distribution cavity, the water outlet of the main water supply pipe is movably arranged along the circumferential direction so as to correspond to the second water distribution cavities one by one, a plurality of water outlets are arranged at the bottom of the first water distribution cavity, the first water distribution cavity is communicated with one of the second water distribution cavities, and the rest of the second water distribution cavities are communicated with at least one guide pipe;
the plurality of water distribution pipes are radially distributed by taking the water distribution box as a center, the plurality of water distribution pipes correspond to the plurality of water outlets one by one, and the plurality of guide pipes correspond to at least one part of the plurality of water distribution pipes;
a plurality of weir grooves, the weir groove is followed circumference extends, and is a plurality of the weir groove one-to-one sets up the low reaches that are used for distributing cooling water at a plurality of distributive pipes, every the weir groove is provided with along its extending direction interval distribution's a plurality of discharge outlets, cooling water in the weir groove passes through the discharge outlet overflows.
2. The water distribution device for the passive containment cooling system test equipment according to claim 1, further comprising a rotating shaft and a rotating bracket capable of rotating around the rotating shaft, wherein the main water supply pipe is arranged on the rotating bracket so that the rotating bracket drives the main water supply pipe to rotate along the circumferential direction.
3. The water distribution device for the passive containment cooling system test equipment according to claim 2, further comprising a driving motor provided with a driving gear, wherein the rotating bracket comprises a driven gear, and wherein the driving gear is meshed with the driven gear so as to drive the rotating bracket to rotate.
4. The water distribution apparatus for the passive containment cooling system test rig of claim 1, wherein a number of the second diversion chambers are disposed around the first diversion chamber.
5. The water distribution apparatus for the passive containment cooling system test rig according to claim 1, comprising a plurality of baffles disposed between two adjacent weir troughs and extending along a surface of the containment vessel to divide the containment vessel surface into a plurality of cooling zones.
6. The water distribution apparatus for the passive containment cooling system test equipment according to claim 5, wherein the number of the cooling zones corresponding to each of the second water distribution chambers is different.
7. The water distribution device for the passive containment cooling system test equipment according to claim 6, wherein the number of the water distribution pipes is N, N is a multiple of 8, one of the second water distribution chambers corresponds to N/2 of the water distribution pipes one by one through N/2 of the guide pipes, the other second water distribution chamber corresponds to N/4 of the water distribution pipes one by one through N/4 of the guide pipes, the other second water distribution chamber corresponds to N/8 of the water distribution pipes one by one through N/8 of the guide pipes, and the other second water distribution chamber is communicated with the first water distribution chamber.
8. The water distribution device for the passive containment cooling system test equipment according to claim 1, comprising a regulating valve, wherein the regulating valve is arranged on the water supply main pipe and is used for regulating the flow of the water supply main pipe.
9. The water distribution apparatus for passive containment cooling system test equipment according to any one of claims 1 to 8, wherein a plurality of the weir troughs are connected in sequence to encircle the containment for one revolution.
10. The water distribution apparatus for the passive containment cooling system test equipment according to any one of claims 1 to 8, wherein the position of the water outlet of the guide pipe is adjustable so that the guide pipe is arrangeable in correspondence with the plurality of the knock out pipes.
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Cited By (1)
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| CN116631660A (en) * | 2022-10-18 | 2023-08-22 | 国家电投集团科学技术研究院有限公司 | Control method, system and equipment for passive containment water distribution device |
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| CN114639493B (en) | 2023-02-28 |
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Effective date of registration: 20231211 Address after: 102209 Beijing Changping Future Science and Technology City Patentee after: STATE POWER INVESTMENT CORPORATION Research Institute Patentee after: Cpi Nuclear Power Co.,Ltd. Address before: 102209 Beijing Changping Future Science and Technology City Patentee before: STATE POWER INVESTMENT CORPORATION Research Institute |