CN108695006B - Loading well temperature control cooling system of spent fuel pool of million kilowatt nuclear power plant - Google Patents
Loading well temperature control cooling system of spent fuel pool of million kilowatt nuclear power plant Download PDFInfo
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- CN108695006B CN108695006B CN201810494082.8A CN201810494082A CN108695006B CN 108695006 B CN108695006 B CN 108695006B CN 201810494082 A CN201810494082 A CN 201810494082A CN 108695006 B CN108695006 B CN 108695006B
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
- G21C19/02—Details of handling arrangements
- G21C19/06—Magazines for holding fuel elements or control elements
- G21C19/07—Storage racks; Storage pools
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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 belongs to the technical field of cores of million-kilowatt nuclear power stations, and particularly relates to a loading well temperature control cooling system of a spent fuel pool of a million-kilowatt nuclear power plant, wherein a temperature control device comprises a control execution component and a temperature monitoring component for monitoring the temperature of water in a loading well, and the temperature monitoring component comprises a plurality of temperature sensing elements connected with the control execution component; the cooling device comprises a water suction pump arranged in the loading well and a connecting pipe group connected with the spent fuel pool and the loading well, the water suction pump is connected with the control execution assembly, and when the water temperature rises to a set value, the control execution assembly starts a motor of the water suction pump to pump high-temperature water into the spent fuel pool for cooling; when the water temperature in the loading well is reduced to a set value, the control execution assembly closes the motor of the water suction pump to stop pumping water to the spent fuel pool, so that the adjustment of the water temperature in the loading well is realized, the temperature in the loading well is kept in a stable range, and the purpose of ensuring the safety of the loading well is achieved.
Description
Technical Field
The invention belongs to the technical field of million kilowatt nuclear power stations, and particularly relates to a temperature control cooling system for a loading well of a spent fuel water pool of a million kilowatt nuclear power station.
Background
Spent fuel is a nuclear fuel that has been irradiated with radiation and used, and is produced by a nuclear reactor in a nuclear power plant. Nuclear fuel after nuclear reactor reactions contains a large amount of radioactive elements and therefore has a large amount of radioactivity, which, if not properly disposed of, can seriously affect the environment and the health of the personnel in contact with them. Therefore, spent fuel reacted by a nuclear reactor of a nuclear power plant needs to be stored in a spent fuel pool for several decades until its activity is reduced to a level where a subsequent post-treatment process for the spent fuel can be performed. With the increasing of domestic nuclear power plants and the continuous operation of the nuclear power plants, the spent fuel pool grillwork of most domestic nuclear power plants at present is full, and the existing container can not meet the requirement of spent fuel storage in the nuclear power plants, so the spent fuel pool storage capacity must be enlarged through transformation, and the normal production in the nuclear power plants is ensured.
When the spent fuel pool is expanded, firstly, an old framework in the spent fuel pool needs to be dismantled, and spent fuel in the old framework needs to be transported to the outside for storage before the old framework is dismantled, but the radioactivity of the spent fuel in the old framework is generally not reduced to the radioactivity value required by the transportation and subsequent spent fuel post-treatment process, so that great difficulty is brought to the transportation and storage of the spent fuel.
Therefore, in the process of emptying the spent fuel, the fuel assembly filled with the spent fuel needs to be temporarily stored in the loading well, however, the spent fuel in the fuel assembly still cracks to generate heat to be released into water in the loading well, so that the temperature of the water in the loading well is increased, and after the water temperature is increased to a certain height, the temperature of the water needs to be reduced to ensure the safety of the loading well.
Disclosure of Invention
The invention aims to provide a loading well temperature control cooling system of a spent fuel pool of a million kilowatt nuclear power plant, and aims to solve the technical problem of cooling after the temperature of water in a loading well is raised in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that: a loading well temperature control cooling system of a spent fuel pool of a million kilowatt nuclear power plant comprises:
the temperature control device comprises a control execution assembly and a temperature monitoring assembly for monitoring the water temperature of the loading well, wherein the temperature monitoring assembly comprises a plurality of temperature sensing elements connected with the control execution assembly;
and the cooling device comprises a water suction pump arranged in the loading well and a connecting pipe group connected with the spent fuel pool and the loading well, and the water suction pump is connected with the control execution assembly.
Preferably, the intelligent control system further comprises an indicating device, wherein the indicating device comprises a red light and a green light, and the red light and the green light are both electrically connected with the control execution assembly.
Preferably, the water absorption device further comprises a mounting bracket, wherein the first end of the mounting bracket is hung on the side wall of the spent fuel pool, the second end of the mounting bracket extends into the spent fuel pool, and the water absorption pump is mounted at the second end of the mounting bracket.
Preferably, the mounting bracket is an all stainless steel bracket.
Preferably, the temperature sensing element comprises a thermal resistor and a resistor housing, the thermal resistor is arranged in the resistor housing and electrically connected with the control execution assembly, and the resistor housing is connected to the mounting bracket.
Preferably, the temperature monitoring assembly further comprises a digital display instrument, and the digital display instrument is electrically connected with the thermal resistor.
Preferably, the number of the temperature sensing elements and the number of the digital display instruments are two, and the two digital display instruments are respectively and correspondingly electrically connected with the two thermal resistors one by one.
Preferably, the control device further comprises a panel change-over switch, and the panel change-over switch is electrically connected with the control execution assembly to control the water suction pump to be opened or closed or to be automatically selected.
Preferably, the connecting pipe set comprises at least two pipes, a first end of each pipe is connected with the water outlet of the water suction pump, a second end of each pipe is communicated to a spent fuel pool, and a gate for leading cold water in the spent fuel pool to flow into the loading well is arranged between the spent fuel pool and the loading well.
Preferably, the catheter comprises a first pipe body and a plurality of second pipe bodies, the first pipe body is connected between the water outlet of the water suction pump and the second pipe bodies, and the rest second pipe bodies are sequentially connected in an end-to-end mode.
Preferably, the first pipe body is a metal hose.
Preferably, the temperature sensing elements are located within the loading well, and each of the temperature sensing elements is distributed at a different height of the loading well.
Preferably, it still includes the switch board, the switch board respectively with control executive component, temperature monitoring subassembly and water absorption pump electric connection.
Preferably, the installing support includes hitching piece, connecting piece and installed part, the hitching piece articulate in the top of loading well lateral wall, the one end of connecting piece with the hitching piece is connected, the other end of connecting piece with the installed part is connected, the suction pump install in on the installed part.
Preferably, the hanging piece comprises a vertical part and a transverse part which are connected with each other to form an inverted L shape, the transverse part abuts against the top end of the side wall of the loading well, and the vertical part is fixed on the side wall of the loading well through a fastener.
Preferably, the connecting piece includes parallel arrangement's head rod and second connecting rod, the upper end of head rod with the upper end of second connecting rod all with hang the connecting piece and be connected, the lower extreme of head rod with the lower extreme of second connecting rod all with the installed part is connected.
Preferably, the connecting member further comprises a plurality of cross bars, each of which is connected between the first connecting bar and the second connecting bar and is arranged at equal intervals.
Preferably, the mounting bracket further comprises a sleeve assembly, and the sleeve assembly fixes the upper part of the water suction pump shell on the connecting piece.
Preferably, the mounting part comprises a support frame body and a support rod body connected to the support frame body, and the lower end of the water suction pump is fixedly mounted on the support frame body and the support rod body through fasteners.
Preferably, the mounting bracket further comprises first and second reinforcing rods connected between the connector and the mounting member.
Preferably, the shell of the water suction pump is made of all stainless steel.
The invention has the beneficial effects that: according to the loading well temperature control cooling system of the spent fuel pool of the million kilowatt nuclear power plant, the temperature monitoring component is arranged in the loading well to monitor the temperature of water in the loading well in real time, and when the water temperature rises to a set value, the control execution component starts the motor of the water suction pump to pump high-temperature water into the spent fuel pool for cooling after obtaining the signal; when the water temperature in the loading well is reduced to a set value, the control execution assembly turns off the motor of the water suction pump to stop pumping water to the spent fuel pool after obtaining the signal, so that the adjustment of the water temperature in the loading well is realized, the temperature in the loading well is kept in a stable range, and the purpose of ensuring the safety of the loading well is achieved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a loading well temperature control cooling system of a spent fuel pool of a million kilowatt nuclear power plant provided by an embodiment of the invention;
fig. 2 is a schematic structural diagram of a mounting bracket of a loading well temperature control cooling system of a spent fuel pool of a million kilowatt nuclear power plant according to an embodiment of the present invention;
fig. 3 is a partially enlarged structural diagram of a portion a in fig. 2.
Wherein, in the figures, the respective reference numerals:
10-cooling device 11-water suction pump 12-conduit
20-mounting bracket 21-hanging piece 22-connecting piece
23-mount 24-socket assembly 30-loading well
31-gate 121-first interface 122-second interface
123-clip 211-vertical part 212-horizontal part
221-first connecting rod 222-second connecting rod 223-cross rod
231-support frame body 232-support rod body 241-first arc-shaped sleeving part
242-fixing member 251-first reinforcing bar 252-second reinforcing bar
1231-hook part 1232-hook part 2311-first side part
2312 second side 2313 transverse part 2421 second arc-shaped connecting part
2422-connecting part.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to fig. 1-3 are exemplary and intended to be used to illustrate the invention, but are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present 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 one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in fig. 1 to 3, an embodiment of the present invention provides a temperature control cooling system for a loading well of a spent fuel pool of a million kilowatt nuclear power plant, including:
the temperature control device comprises a control execution assembly and a temperature monitoring assembly for monitoring the water temperature of the loading well 30, wherein the temperature monitoring assembly comprises a plurality of temperature sensing elements connected with the control execution assembly;
and the cooling device comprises a water suction pump 11 arranged in the loading well 30 and a connecting pipe group 12 for connecting the spent fuel pool and the loading well, wherein the water suction pump 11 is connected with the control execution assembly.
Specifically, in the loading well temperature control cooling system of the spent fuel pool of the million kilowatt nuclear power plant of the embodiment of the invention, the temperature monitoring component is arranged in the loading well 30, the thermal resistor in the temperature monitoring component can detect the temperature of water in the loading well 30, when the water temperature rises to a set value, the resistance value of the thermal resistor is gradually increased to a certain value along with the water temperature, the current of the control execution component electrically connected with the thermal resistor is changed therewith, the control execution component starts the motor of the water suction pump 11 to pump high-temperature water into the spent fuel pool after obtaining the signal, and then cold water in the spent fuel pool naturally overflows into the loading well 30 through the gate 31 to be cooled; when the water temperature in the loading well 30 is reduced to a set value, the resistance value of the thermal resistor is gradually reduced to a certain value along with the water temperature, the current of the control execution assembly electrically connected with the thermal resistor changes, the control execution assembly turns off the motor of the water suction pump 11 after receiving the signal to stop pumping water to the spent fuel pool, at the moment, due to the fact that no water flows into the spent fuel pool, cold water stops overflowing naturally into the loading well 30, meanwhile, the balance between the water level in the loading well 30 and the water level in the spent fuel pool is kept, the situation that the water in the loading well 30 is excessively pumped out to cause a safety problem is avoided, the adjustment of the water temperature in the loading well 30 is achieved, the temperature in the loading well 30 is kept in a stable range, and the purpose of ensuring the safety of the loading well 30 is achieved.
Further, in the grid replacing process, because the mixing between the canning pool and the spent fuel pool is not uniform, and the water temperature at each position in the loading well 30 is not uniform, the water suction pump 11 is required to carry out forced convection on the canning pool and the spent fuel pool so as to maintain the average temperature of the canning pool and the spent fuel pool not to exceed 45 ℃ or 50 ℃.
In this embodiment, million kilowatt level nuclear power plant spent fuel pond's loading well temperature control cooling system still includes indicating device, indicating device includes red light and green light, the red light with the green light all with control executive component electric connection. Specifically, the running state of the motor of the water suction pump 11 is displayed through a red light and a green light, and when the red light is on, the motor is in the running state; when the green light is on, the motor is in a stop state, so that the worker can clearly and clearly connect the state of adjusting the water temperature in the loading well 30.
In this embodiment, the temperature monitoring assembly further includes at least one digital display, and each digital display is electrically connected to each thermal resistor in a one-to-one correspondence manner. Specifically, the digital display instrument can accurately reflect the value of the temperature sensed by the thermal resistor in real time, and a pair of normally open output points and a pair of normally closed output points are provided by the digital display instrument, so that when the displayed value is increased to 45 ℃ or 50 ℃, the normally open output points are opened to control the motor of the water suction pump 11 to be automatically started; when the displayed value is reduced to 40 ℃, the normally closed output point is opened to control the motor of the water suction pump 11 to automatically close.
In this embodiment, the number of the temperature sensing elements and the number of the digital display instruments are two, and the two digital display instruments are respectively and electrically connected with the two thermal resistors in a one-to-one correspondence manner. Specifically, because the water temperature in the loading well 30 is not balanced, in order to ensure that the temperature sensing elements can timely detect the water temperature in the loading well 30, the two temperature sensing elements are respectively arranged near the grid, when one of the two temperature monitoring values is higher than 45 ℃ or 50 ℃, the motor of the water suction pump 11 is automatically started, and when the two temperature monitoring values are lower than 40 ℃, the motor of the water suction pump 11 is automatically stopped.
In this embodiment, the control device further includes a panel switch electrically connected to the control execution module to control the opening or closing or automatic selection of the water suction pump 11. Specifically, the mode of the operation of the motor of the water suction pump 11 is controlled by the panel change-over switch, when a worker needs to manually adjust the temperature of water in the loading well 30 according to actual conditions, the motor of the water suction pump 11 can be manually turned on or turned off by the panel change-over switch, and when the motor of the water suction pump 11 needs to be in an automatic operation mode, the motor is switched by the panel change-over switch.
In this embodiment, as shown in fig. 2, the mounting bracket 20 includes a hanging member 21, a connecting member 22 and a mounting member 23, the hanging member 21 is hung on the top of the side wall of the loading well 30, one end of the connecting member 22 is connected to the hanging member 21, the other end of the connecting member 22 is connected to the mounting member 23, and the water suction pump 11 is mounted on the mounting member 23. Specifically, the water suction pump 11 is arranged in the loading well 30 through the mounting bracket 20 to pump out high-temperature water, and the depth of the mounting bracket 20 extending into the spent fuel pool can be set according to actual needs, so that the water suction pump 11 can be always positioned in the area of the loading well 30 for generating high-temperature water, the purpose of timely and effectively sucking the high-temperature water in the loading well 30 is achieved, and the temperature of the water in the loading well 30 is effectively adjusted.
In this embodiment, as shown in fig. 2, the hanging piece 21 includes a vertical portion 211 and a horizontal portion 212, one end of the horizontal portion 212 is connected to one end of the vertical portion 211, the other end of the horizontal portion 212 is connected to the top end of the connecting piece 22, the horizontal portion 212 abuts against the top end of the sidewall of the loading well 30, the other end of the vertical portion 211 extends vertically downward and is attached to the sidewall of the loading well 30, and the vertical portion 211 is fixedly connected to the sidewall of the loading well 30 through a fastener. Specifically, the upper end of the mounting bracket 20 is hung at the upper end of the side wall of the loading well 30 through a hanging piece 21, wherein the transverse portion 212 abuts on the upper surface of the side wall, the vertical portion 211 is downward fitted with the side wall surface of the loading well 30, and the vertical portion 211 and the side wall surface of the loading well 30 are fixedly connected together through a fastener, so that the mounting bracket 20 can be stably fixed on the side wall of the loading well 30.
In this embodiment, as shown in fig. 2, the connecting member 22 includes a first connecting rod 221 and a second connecting rod 222 which are arranged in parallel, an upper end of the first connecting rod 221 and an upper end of the second connecting rod 222 are both connected to the hanging member 21, and a lower end of the first connecting rod 221 and a lower end of the second connecting rod 222 are both connected to the mounting member 23. Specifically, the connecting member 22 forms its length direction support by two parallel first connecting rods 221 and second connecting rods 222, and make the first connecting rods 221 and second connecting rods 222 can be attached to the side walls of the loading well 30 as much as possible, because there is an uneven condition on the side walls of the loading well 30, if a long strip plate is used as the connecting member 22, the long strip plate can not be attached to the uneven side walls, therefore, when the suction pump 11 works, the suction pump can cause more large amplitude vibration of the long strip plate due to mechanical vibration of the suction pump 11, causing unstable water absorption, which can not meet the use requirements, and the use of two parallel first connecting rods 221 and second connecting rods 222 to form its length direction support can effectively solve the technical problem, and realize the stable water pumping effect of the suction pump 11.
In this embodiment, as shown in fig. 2, the connecting member 22 further includes a plurality of cross bars 223, and each of the cross bars 223 is connected between the first connecting bar 221 and the second connecting bar 222 and is arranged at equal intervals. Specifically, through set up a plurality of horizontal poles 223 between first connecting rod 221 and second connecting rod 222, and interval evenly distributed between each horizontal pole 223 to strengthen the stability of connecting between first connecting rod 221 and the second connecting rod 222, guarantee that suction pump 11 can work under water firmly, its simple structure simultaneously, not only easily processing, the quality is lighter moreover, easily installation.
In this embodiment, as shown in fig. 2, the mounting bracket 20 further includes a sleeving assembly 24, the sleeving assembly 24 includes a first arc sleeving part 241 and a fixing part 242, the fixing part includes a second arc sleeving part 2421 and a connecting part 2422, the first arc sleeving part 241 and the second arc sleeving part 2421 are oppositely arranged and sleeved on the upper part of the casing of the water suction pump 11, and the connecting part 2422 is connected between the second arc sleeving part 2421 and the lowest cross bar 223. Specifically, the upper portion of the suction pump 11 is fixedly mounted on the cross bar 223 of the mounting bracket 20 through the socket assembly 24, and the lower end of the suction pump 11 is fixedly mounted on the mounting portion of the mounting bracket 20 through the fastening member, so that the suction pump 11 can be stably mounted on the mounting bracket 20, and the housing of the suction pump 11 is kept parallel to the connecting member 22.
In this embodiment, as shown in fig. 2, the mounting member 23 includes a support frame 231 and at least one support rod 232, the support frame 231 includes a first side portion 2311, a second side portion 2312 and a cross portion 2313, one end of the first side portion 2311 and one end of the second side portion 2312 are respectively and vertically connected to the lower end of the first connecting rod 221 and the lower end of the second connecting rod 222, two ends of the cross portion 2313 are connected between the other end of the first side portion 2311 and the other end of the second side portion 2312, each support rod 232 is connected between the first side portion 2311 and the second side portion 2312 in parallel with the cross portion 2313, and the lower end of the suction pump 11 is fixedly mounted on the cross portion 2313 and each support rod 232 by a fastener. Specifically, the mounting part 23 is provided as a hollow bracket, so that the lower end of the water suction pump 11 can be fixed on the mounting part 23 through a fastener, and the water suction port below the water suction pump 11 is not affected to suck water, so that the water suction pump 11 can timely and effectively pump high-temperature water.
In this embodiment, as shown in fig. 2, the mounting bracket 20 further includes a first reinforcing bar 251 and a second reinforcing bar 252, one end of the first reinforcing bar 251 is connected to the lower portion of the first connecting bar 221, the other end of the first reinforcing bar 251 is connected to the front portion of the first side portion 2311, one end of the second reinforcing bar 252 is connected to the lower portion of the second connecting bar 222, and the other end of the second reinforcing bar 252 is connected to the front portion of the second side portion 2312. Specifically, through the connecting action of the first reinforcing rod 251 and the second reinforcing rod 252, a right triangle is formed among the first connecting rod 221, the first side portion 2311 and the first reinforcing rod 251, and a congruent right triangle is also formed among the same second connecting rod 222, the second side portion 2312 and the second reinforcing rod 252, and by utilizing the characteristics of the triangles, the bilaterally symmetrical right triangles can effectively enhance the stability of the connection between the mounting part 23 and the connecting part 22, so that the mounting bracket 20 can effectively provide a supporting platform for the operation of the suction pump 11, and can resist the mechanical vibration generated when the suction pump 11 operates, thereby preventing the occurrence of safety accidents caused by the dropping of the suction pump 11.
In this embodiment, as shown in fig. 2 to 3, the guide tube 12 includes a first tube and a plurality of second tubes, one end of the first tube is provided with a first interface 121, the other end of the first tube is provided with a second interface 122, one end of each of the second tubes is provided with the second interface 122, the other end of each of the second tubes is provided with a third interface, the first interface 121 and the water outlet of the water suction pump 11 are fixedly connected by a fastening member after being attached to each other, each of the second interfaces 122 is provided with a plurality of clamping members 123, each of the third interfaces is provided with a plurality of clamping interfaces, and the clamping members 123 are clamped in the clamping interfaces. Specifically, the plurality of guide pipes 12 are arranged, and the guide pipes 12 are connected with each other to convey high-temperature water at the water outlet of the water suction pump 11 to the spent fuel pool, wherein the first guide pipe 12 connected with the water suction pump 11 is provided with a first interface 121 which is attached to the water outlet of the water suction pump 11 and fixedly connected together through a fastener, and a sealing ring is arranged at the attachment position of the first interface 121 and the water outlet of the water suction pump 11, so that the first interface 121 and the water outlet of the water suction pump 11 are connected in a sealing manner, and the high-temperature water is prevented from leaking outside to cause potential safety hazards; the guide tube 12 is connected with the guide tube 12 through the second interface 122 and the third interface, the second interface 122 is provided with a clamping member 123, the third interface is correspondingly provided with a clamping interface, and the clamping member 123 is clamped in the clamping interface to clamp the second interface and the third interface together, so that the installation is convenient and the connection is stable.
In this embodiment, as shown in fig. 2 to 3, the clamping member 123 includes a clamping hook portion 1231 and a clamping portion 1232, one end of the clamping portion 1232 is connected to the periphery of the second interface 122, the other end of the clamping portion 1232 is connected to the clamping hook portion 1231, the clamping hook portion 1231 is clamped in the clamping interface. Specifically, the clamping portion 1232 extends the clamping hook portion 1231, so that the clamping hook portion 1231 can be clamped in the clamping port.
In this embodiment, as shown in fig. 3, the number of the clamping members 123 is two, and two of the clamping members 123 are symmetrically distributed on the periphery of the second interface 122, two clamping interfaces are provided on the third interface, and two of the clamping interfaces are symmetrically distributed on the periphery of the third interface. Specifically, the two clamping pieces 123 are symmetrically clamped with the two clamping interfaces, so that the connection between the guide pipe 12 and the guide pipe 12 is more stable and more convenient.
In this embodiment, the resistor housing is a full stainless steel housing. Specifically, due to the special environment in the spent fuel pool, the material of the resistor shell cannot contain halogen elements and sulfate ions, and the use requirement of radioactive conditions needs to be met during sealing, so the resistor shell is a 304 stainless steel shell.
In this embodiment, the first pipe is a metal hose. Specifically, the end of the conduit 12 connected with the water outlet of the suction pump 11 is provided with a metal hose, so that the conduit 12 can swing in water more flexibly, and continuously adapts to the requirement of pumping water when the depth of the mounting bracket 20 extending into the loading well 30 is adjusted, and the suction pump 11 does not need to be taken out specially to be detached and adjusted, so that the use is convenient and safe.
In this embodiment, the casing of the water suction pump 11 is made of stainless steel. Specifically, due to the special environment in the spent fuel pool, the material of the resistor housing cannot contain halogen elements and sulfate ions, and the housing of the water suction pump 11 is a 304 stainless steel housing when sealed and needs to meet the use requirement of radioactive conditions.
In this embodiment, the mounting bracket 20 is a full stainless steel bracket. Specifically, due to the special environment in the spent fuel pool, the material of the resistor housing cannot contain halogen elements and sulfate ions, and the use requirement of radioactive conditions needs to be met during sealing, so the mounting bracket 20 is a 304 stainless steel bracket.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (18)
1. The utility model provides a loading well temperature control cooling system of million kilowatt level nuclear power plant spent fuel pond which characterized in that: the method comprises the following steps:
the temperature control device comprises a control execution assembly and a temperature monitoring assembly for monitoring the water temperature of the loading well, wherein the temperature monitoring assembly comprises a plurality of temperature sensing elements connected with the control execution assembly;
the cooling device comprises a water suction pump arranged in the loading well and a connecting pipe group for connecting the spent fuel pool and the loading well, and the water suction pump is connected with the control execution assembly; the connecting pipe set comprises at least two pipes, the pipes connect the water outlet of the water suction pump to a spent fuel pool, a gate for enabling cold water in the spent fuel pool to flow into the loading well is arranged between the spent fuel pool and the loading well, and therefore the cold water in the spent fuel pool naturally overflows into the loading well through the gate for cooling;
the installing support, it includes hitching member, connecting piece and installed part, the hitching member articulate in the top of loading well lateral wall, the one end of connecting piece with the hitching member is connected, the other end of connecting piece with the installed part is connected, the suction pump install in on the installed part and be located take out high temperature water in the loading well.
2. The temperature-controlled cooling system for the loading well of the spent fuel pool of the million kilowatt nuclear power plant according to claim 1, is characterized in that: it still includes indicating device, indicating device includes red light and green light, the red light with green light all with control executive component electric connection.
3. The temperature-controlled cooling system for the loading well of the spent fuel pool of the million kilowatt nuclear power plant according to claim 1, is characterized in that: the mounting bracket is a full stainless steel bracket.
4. The temperature-controlled cooling system for the loading well of the spent fuel pool of the million kilowatt nuclear power plant according to claim 1, is characterized in that: the temperature sensing element comprises a thermal resistor and a resistor shell, the thermal resistor is arranged in the resistor shell and electrically connected with the control execution assembly, and the resistor shell is connected to the mounting support.
5. The temperature-controlled cooling system for the loading well of the spent fuel pool of the million kilowatt nuclear power plant according to claim 4, is characterized in that: the temperature monitoring assembly further comprises a digital display instrument, and the digital display instrument is electrically connected with the thermal resistor.
6. The temperature-controlled cooling system for the loading well of the spent fuel pool of the million kilowatt nuclear power plant according to claim 5, is characterized in that: the number of the temperature sensing elements and the number of the digital display instruments are two, and the two digital display instruments are respectively and electrically connected with the two thermal resistors in a one-to-one correspondence mode.
7. The temperature-controlled cooling system for the loading well of the spent fuel pool of the million kilowatt nuclear power plant according to claim 1, is characterized in that: the control device also comprises a panel change-over switch which is electrically connected with the control execution assembly to control the water suction pump to be switched on or switched off or to be automatically selected.
8. The temperature-controlled cooling system for the loading well of the spent fuel pool of the million kilowatt nuclear power plant according to claim 1, is characterized in that: the pipe includes first body and a plurality of second body, first body connect in the delivery port of water sucking pump with between the second body, all the other each the second body is in proper order the end to end extend to in the spent fuel pond.
9. The temperature-controlled cooling system for the loading well of the spent fuel pool of the million kilowatt nuclear power plant according to claim 8, is characterized in that: the first pipe body is a metal hose.
10. The temperature-controlled cooling system for the loading well of the spent fuel pool of the million kilowatt nuclear power plant according to claim 1, is characterized in that: the temperature sensing elements are located in the loading well, and the temperature sensing elements are distributed at different heights of the loading well.
11. The temperature-controlled cooling system for the loading well of the spent fuel pool of the million kilowatt nuclear power plant according to claim 1, is characterized in that: the water pump water.
12. The temperature-controlled cooling system for the loading well of the spent fuel pool of the million kilowatt nuclear power plant according to claim 1, is characterized in that: the hanging piece comprises a vertical part and a horizontal part which are connected with each other to form an inverted L shape, the horizontal part is abutted against the top end of the side wall of the loading well, and the vertical part is fixed on the side wall of the loading well through a fastening piece.
13. The temperature-controlled cooling system for the loading well of the spent fuel pool of the million kilowatt nuclear power plant according to claim 1, is characterized in that: the connecting piece includes parallel arrangement's head rod and second connecting rod, the upper end of head rod with the upper end of second connecting rod all with it connects to hang the connecting piece, the lower extreme of head rod with the lower extreme of second connecting rod all with the installed part is connected.
14. The temperature-controlled cooling system for the loading well of the spent fuel pool of the million kilowatt nuclear power plant according to claim 13, is characterized in that: the connecting piece still includes a plurality of horizontal poles, each the horizontal pole all connect in between first connecting rod and the second connecting rod and equidistant arrangement.
15. The temperature-controlled cooling system for the loading well of the spent fuel pool of the million kilowatt nuclear power plant according to claim 1, is characterized in that: the mounting bracket further comprises a sleeving component, and the upper part of the shell of the water suction pump is fixed on the connecting piece through the sleeving component.
16. The temperature-controlled cooling system for the loading well of the spent fuel pool of the million kilowatt nuclear power plant according to claim 1, is characterized in that: the installed part including support the support frame body with connect in support the support body of rod on the frame body, the lower extreme of suction pump passes through fastener fixed mounting support the frame body with on the support body of rod.
17. The temperature-controlled cooling system for the loading well of the spent fuel pool of the million kilowatt nuclear power plant according to claim 1, is characterized in that: the mounting bracket further includes a first reinforcement bar and a second reinforcement bar connected between the connector and the mounting member.
18. The temperature control cooling system for the loading well of the spent fuel pool of the million kilowatt nuclear power plant according to any one of claims 1 to 17, is characterized in that: the shell of the water suction pump is made of all stainless steel.
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| CN201810494082.8A CN108695006B (en) | 2018-05-22 | 2018-05-22 | Loading well temperature control cooling system of spent fuel pool of million kilowatt nuclear power plant |
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| CN201810494082.8A CN108695006B (en) | 2018-05-22 | 2018-05-22 | Loading well temperature control cooling system of spent fuel pool of million kilowatt nuclear power plant |
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| CN108695006B true CN108695006B (en) | 2020-06-05 |
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| CN206789310U (en) * | 2017-03-21 | 2017-12-22 | 广东核电合营有限公司 | Nuclear Power Station's Exhausted Fuels cooling circuit |
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| CN108695006A (en) | 2018-10-23 |
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