A power distribution management method and system for RPE pump pit

Abstract

The present invention provides a power distribution management method and system for an RPE pump pit, which classifies the single pumps in a single-pump pit according to their usage requirements: when the single pump is a single-pump on-demand pump, it needs to be powered on at any time during overhaul; when the single pump is a single-pump delayed pump, it needs to delay power outages during overhauls, and the power supply to the connected distribution board will not be cut off until the water in the pump pit is drained; when the single pump is a single-pump temporary pump, it may need temporary power supply during overhauls; the above-mentioned single pumps are separately managed for power distribution, so that the single pumps under different classifications can all be powered when needed, so as to be used as needed during overhauls. The present invention also manages power distribution for the dual pumps in the dual-pump pit during overhauls, so that at least one of the dual pumps can be powered, and the dual pumps serve as backup for each other. Therefore, the present invention solves the problem of power distribution management of RPE pump pits during overhauls, realizes effective management of the classification of single and dual pumps, and ensures the maintenance safety of equipment in single-pump pits and dual-pump pits during overhauls.

Description

Technical Field

[0001] The present invention relates to the technical field of nuclear power, and in particular to a power distribution management method and system for an RPE pump pit during overhaul. Background Art

[0002] The RPE (nuclear island exhaust and drainage system) pump pit is a critical facility in a nuclear power plant, primarily used to collect and treat wastewater generated by radiation protection equipment and radiation monitoring equipment within the plant. This wastewater may contain radioactive or other hazardous substances and requires treatment before discharge or further processing. The RPE pump pit is typically a deep, wide pit equipped with a pump and piping system to collect wastewater from various equipment and facilities and transport it to the wastewater treatment system for treatment. Wastewater collected in the RPE pump pit must be treated in the wastewater treatment system before discharge or further treatment. The wastewater treatment system typically includes filtration, sedimentation, adsorption, ion exchange, and other processes to remove radioactive and other hazardous substances from the wastewater. As a facility involving radioactive materials, the RPE pump pit is subject to strict compliance with relevant radiation protection standards and safety regulations. Workers require specialized training, the use of appropriate personal protective equipment, and adherence to safe operating procedures. RPE pump pits must be equipped with monitoring and control systems to monitor the radioactivity level and concentration of other hazardous substances in the wastewater in real time and ensure the proper operation of the wastewater treatment system.

[0003] Nuclear power plant equipment maintenance consists of two different types of maintenance: overhaul and routine inspection. The main differences between the two types of maintenance work are as follows: Routine inspection is usually the routine inspection, care, and maintenance of equipment. It is mainly preventive and usually does not involve large-scale repair work; routine inspection is carried out regularly, is relatively short, and is performed while the equipment is in operation, without significantly affecting production. Overhaul mainly involves the comprehensive maintenance and repair of equipment or facilities, which may require the replacement of parts, major modifications, or repair work. It is carried out regularly and takes a long time, which may take several days or even weeks to complete. During this time, the equipment will be shut down for maintenance. Therefore, the main power supply is maintained or shut down, but the RPE pump pit requires continuous power supply during overhaul to maintain normal operation.

[0004] During nuclear power plant overhauls, power distribution management of the RPE pump pit is particularly important to ensure normal operation of the RPE pump pit when the main power supply is cut off. Effective power distribution management can also reduce downtime, improve work efficiency, and shorten the overhaul cycle. Summary of the Invention

[0005] In view of some of the shortcomings of the above-mentioned prior art, the present invention provides a power distribution management method and system for an RPE pump pit, aiming to solve the problem of power distribution for a single pump in a single-pump pit and for two pumps in a dual-pump pit during overhaul. To achieve the above-mentioned and other related objects, the present invention provides a power distribution management method for an RPE pump pit, comprising the following steps:

[0006] S1: Determine whether the pump pit is a single-pump pit or a double-pump pit;

[0007] S2: Determine if it is a single pump pit and determine the type of the single pump in the pit:

[0008] S21, determining that the single pump is a single pump at any time, and switching the power distribution board for the pump to the daily maintenance distribution board;

[0009] S22: Determine that the single pump is a single-pump delay pump, and connect the adjacent distribution boards that supply power to the pump via switches;

[0010] S23, determining that the single pump is a temporary pump, and connecting the power distribution board that supplies power to the pump to the temporary power supply;

[0011] S3: Determine that it is a dual-pump pit, and judge whether the distribution board that supplies power to the dual pumps in the dual-pump pit is connected to two power supply columns. If not, connect the distribution board that supplies power to the dual pumps to the two power supply columns respectively.

[0012] In one embodiment of the present invention, there are 28 single pumps available for pumping at any time in S21, and the daily maintenance distribution board to which the single pumps available for pumping at any time are connected is connected to the overhaul period power supply and the daily power supply through a double-cut power switch.

[0013] In one embodiment of the present invention, in step S21, the power supply for the daily maintenance switchboard is the LKZ switchboard, and the power supply for the LKZ switchboard is the overhaul period power supply, that is, the LKZ switchboard has power during the overhaul period.

[0014] In one embodiment of the present invention, there are 8 single-pump delay pumps in S22, and the adjacent distribution boards connected to the single-pump delay pumps are connected through switches, or each distribution board is connected to the two power supply columns through a double-cut power switch.

[0015] In one embodiment of the present invention, in step S22, the power sources supplying power to the adjacent distribution boards are the two columns of power sources.

[0016] In one embodiment of the present invention, there is one single-pump temporary pump in S23, and the distribution board connected to the single-pump temporary pump is connected to the temporary power supply and the daily power supply through a double-cut power switch.

[0017] In one embodiment of the present invention, the two power supply columns in S3 are power supply columns A and B, and the power supply columns A and B are not powered off at the same time during the overhaul.

[0018] In one embodiment of the present invention, there are 7 dual-pump pits in S3, and two distribution boards of the dual pumps in each dual-pump pit are connected. Each distribution board is connected to two power supplies through a double-cut power switch.

[0019] The present invention also includes a power distribution management system using the above-mentioned power distribution management method, comprising:

[0020] Power supply module, which includes daily power supply, temporary power supply and overhaul power supply; the daily power supply includes two power supply trains, which will not be cut off at the same time during overhaul; the temporary power supply is for temporary power supply, and the overhaul power supply is for powering the equipment during overhaul;

[0021] A judgment module, the judgment module judges the type of the single pump in the single-pump pump pit and the type of power supply for the switchboard of the dual pumps in the dual-pump pump pit;

[0022] Control module, controls whether the single pump and double pump are energized during overhaul.

[0023] In one embodiment of the present invention, the judgment module includes a first judgment module and a second judgment module, the first judgment module judging the type of the single pump of the single-pump pump pit during overhaul, and the second judgment module judging the type of power supply connected to the switchboard of the dual pumps during overhaul;

[0024] The control module includes a first control module and a second control module. The first control module controls the single pump to be powered at all times during the overhaul, extends the shutdown time of the distribution board of the single pump delay pump so that the corresponding single pump pit is drained before the switch is shut down, and controls the temporary pump to be powered; the second control module controls at least one of the dual pumps to be powered during the overhaul.

[0025] The beneficial technical effects of the present invention include at least:

[0026] The power distribution management method and system of the RPE pump pit of the present invention classifies the single pumps in the single pump pit according to their usage requirements: when the single pump is a single pump at any time pump, it needs to be powered at any time during the overhaul (that is, it is in a power supply state); when the single pump is a single pump delay pump, it needs to delay the power outage during the overhaul, and the power will be cut off after the water in the pump pit is drained and the distribution board to which it is connected is drained; the single pump is a single pump temporary pump, which may need temporary power supply during the overhaul; the above-mentioned single pumps are respectively managed for power distribution, so that the single pumps under different classifications can be powered when needed, so as to be used as needed during the overhaul. The present invention also manages the power distribution of the dual pumps in the dual pump pit during the overhaul, so that at least one of the dual pumps can be powered, and the dual pumps serve as backup for each other. Therefore, the present invention solves the problem of power distribution management of the RPE pump pit during the overhaul, realizes effective management of the classification of single pumps and dual pumps, and ensures the maintenance safety of equipment in the single pump pit and the dual pump pit during the overhaul. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A flow chart of a power distribution management method for an RPE pump pit provided in one embodiment of the present invention;

[0028] Figure 2 A schematic diagram of power distribution for a single pump pit in a power distribution management method for an RPE pump pit provided in one embodiment of the present invention;

[0029] Figure 3 A schematic diagram of power distribution for a dual-pump pump pit according to a power distribution management method for an RPE pump pit provided in one embodiment of the present invention;

[0030] Figure 4 This is a system architecture diagram of the power distribution management system for an RPE pump pit provided by one embodiment of the present invention.

[0031] Component Symbol Description:

[0032] Double-cut power switch 11, single pump anytime pump 21, single pump delayed pump 22, single pump temporary pump 23, double pump 24, overhaul period power supply 41, temporary power supply 42. DETAILED DESCRIPTION

[0033] The following describes the embodiments of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. The details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other unless they conflict.

[0034] It should be noted that the illustrations provided in the following embodiments are merely schematic illustrations of the basic concept of the present invention. Therefore, the illustrations only show components related to the present invention and are not drawn according to the number, shape, and size of components in actual implementation. In actual implementation, the type, quantity, and proportion of each component may be changed arbitrarily, and the component layout may also be more complex.

[0035] In the following description, numerous details are discussed to provide a more thorough explanation of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring the embodiments of the present invention.

[0036] See Figure 1 The present invention provides a power distribution management method for an RPE pump pit, comprising the following steps:

[0037] S1: Determine whether the pump pit is a single-pump pit or a double-pump pit;

[0038] S2: Determine if it is a single pump pit and determine the type of the single pump in the pit:

[0039] S21, determining that the single pump is a single pump at any time pump 21, switching the power distribution board for it to the daily maintenance distribution board;

[0040] S22, determining that the single pump is a single pump delay pump 22, and connecting the adjacent distribution boards that supply power to the single pump via switches;

[0041] S23, determining that the single pump is a single temporary pump 23, and connecting the power distribution board that supplies power to the single pump to the temporary power supply;

[0042] S3: Determine that it is a dual-pump pit, and judge whether the distribution board that supplies power to the dual pumps 24 in the dual-pump pit is connected to two power supply columns. If not, connect the distribution board that supplies power to the dual pumps 24 to the two power supply columns respectively.

[0043] The above-mentioned power distribution management method for the RPE pump pit classifies and manages the single pump in the single-pump pump pit and the double pumps in the double-pump pump pit. During the overhaul period, it meets the power supply needs of the single pump and the double pump, realizes the drainage of the pump pit, and ensures the maintenance safety of the equipment in the pump pit.

[0044] Specifically, if Figure 1 In the embodiment shown, it is first determined whether it is a single-pump pit. If so, the type of single pump in the single-pump pit is determined. When the single pump is a single-pump on-call pump 21, its distribution board is switched to the daily maintenance board. When the single pump is a single-pump delayed pump 22, its adjacent distribution boards are connected through a switch. When the single pump is a single-pump temporary pump 23, its distribution board is connected to the temporary power supply 42. If it is determined that it is not a single-pump pit, it is determined to be a double-pump pit. Then, it is determined whether the distribution board of the double pump 24 in the double-pump pit is connected to two columns of power supplies. If so, the process ends. If not, the distribution board of the double pump 24 is connected to two columns of power supplies.

[0045] See Figure 2 In one embodiment of the present invention, the two power supply trains are different power supply trains, for example, trains A and B. Trains A and B are not de-energized simultaneously during overhaul. It should be noted that during overhaul, two trains are typically overhauled in parallel, such as trains A and C or trains B and C. Trains A and B are not overhauled simultaneously, i.e., trains A and B are not de-energized simultaneously.

[0046] In one embodiment of the present invention, in step S21, the daily maintenance switchboard is powered by the LKZ switchboard, which is powered by the overhaul power supply 41, meaning the LKZ switchboard remains powered during the overhaul period. In step S22, the adjacent switchboards are powered by two power supply lines (i.e., two different power supply lines). In step S21, there are 28 single-pump on-the-go pumps 21, each connected to the daily maintenance switchboard, which is either LKD, LKG, or LKH. These are connected to two power supply lines, such as the overhaul power supply 41 and the daily power supply, via a double-cut power switch 11. In step S22, there are 8 single-pump delay pumps 22, each connected to adjacent switchboards connected by switches, or each switchboard is connected to two power supply lines, such as line A and line B, via a double-cut power switch 11. The switchboards for the single-pump delay pumps 22 are either LKI or LKR. In step S22, there is one single-pump temporary pump 23. The switchboard connected to this single-pump temporary pump 23 is connected to both the temporary power source 42 and the normal power supply via a double-cut power switch 11. The switchboard for this single-pump temporary pump is an LLV. It is worth noting that the number of single-pump pits, single-pump on-demand pumps 21, single-pump delayed pumps 22, and single-pump temporary pumps 23 can be adjusted based on actual conditions in different embodiments of the present invention.

[0047] It should be noted that the above-mentioned letter codes LKZ, LKD, LKG, LKH, LKI and LKR in nuclear power plants represent low-voltage AC power supply 380V systems, while the letter code LLV in nuclear power plants represents low-voltage AC emergency distribution panel 380V systems.

[0048] See Figure 3 In one embodiment of the present invention, there are seven dual-pump pits. The two pumps 24 in the first type of dual-pump pit are each connected to a distribution board. Each distribution board can be connected to two power supply columns (i.e., column A power supply and column B power supply) via a double-cut power switch 11. In this way, each distribution board connected to the two pumps in the dual-pump pit can be powered at any time through the use of the double-cut power switch 11. In the second type of dual-pump pit, the two distribution boards connected to the two pumps 24 are each directly connected to two power supply columns. This allows one of the two distribution boards to remain powered during overhaul. The number of the first type of dual-pump pit and the second type of dual-pump pit can vary according to actual needs. For example, there are five first type dual-pump pits and two second type dual-pump pits. The dual-pump pits in different embodiments of the present invention can also be adjusted according to actual conditions.

[0049] See Figure 4The present invention also provides a power distribution management system that utilizes the above-described RPE pump pit power distribution management method. In one embodiment of the present invention, the power distribution management system includes a power supply module, a determination module, and a control module. The power supply module includes a daily power supply, two power supply trains, a temporary power supply 42, and an overhaul power supply 41. The daily power supply includes two power supply trains, which are not disconnected simultaneously during overhaul. The temporary power supply 42 is a temporary power supply, and the overhaul power supply 41 is a power supply that supplies power to the equipment during overhaul.

[0050] The judgment module includes a first judgment module and a second judgment module, which are used to determine the type of single pump in the single-pump pit and the type of power supply provided to the switchboard of the dual pumps 24 in the dual-pump pit. The control module includes a first control module and a second control module, which respectively control whether the single pump and dual pumps 24 are powered during overhaul. During overhaul, the first judgment module determines the type of single pump in the single-pump pit; during overhaul, the second judgment module determines the type of power supply connected to the switchboard of the dual pumps 24. During overhaul, the first control module controls the power supply of the single-pump standby pump 21, extends the power supply shutdown time of the single-pump delay pump 22, and controls the power supply of the temporary pump 23. During overhaul, the second control module controls the power supply of at least one of the dual pumps 24.

[0051] In summary, the power distribution management method and system of the RPE pump pit of the present invention first classifies the single pumps in the single pump pit into single pump on demand pumps 21, single pump time delay pumps 22 and single pump temporary pumps 23, wherein the single pump on demand pumps 21 need to be powered on at any time during the overhaul; the single pump time delay pumps 22 need to delay the power outage during the overhaul, and the power supply to the switchboard to which they are connected will be cut off before the power supply is cut off; the single pump temporary pumps 23 may need temporary power supply during the overhaul; and then the above-mentioned single pumps are respectively managed for power distribution, the switchboard of the single pump on demand pump 21 is switched to the daily maintenance switchboard, the adjacent switchboards of the single pump time delay pump 22 are connected by switches, and the switchboard of the single pump temporary pump 23 is connected to a temporary power supply, so that the single pumps under different classifications can be powered on when needed, in preparation for use as needed during the overhaul. The present invention also manages power distribution for the dual pumps in the dual pump pit during the overhaul, so that at least one of the dual pumps can be powered, and the dual pumps serve as backup for each other. Therefore, the present invention solves the problem of power distribution management of the RPE pump pit during overhaul, realizes effective management of the classification of single pumps and double pumps, and ensures the maintenance safety of equipment in the single pump pit and the double pump pit during overhaul.

[0052] The flow charts and block diagrams in the accompanying drawings illustrate the possible implementation architecture, functions and operations of the methods and computer program products according to various embodiments of the present invention. In this regard, each box in the flow chart or block diagram can represent a module, program segment, or a part of code, and the module, program segment, or a part of code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order than that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flow chart, and the combination of the boxes in the block diagram and / or flow chart, can be implemented with a dedicated hardware-based system that performs the specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0053] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A power distribution management method for an RPE pump pit, characterized in that: The following steps are involved: S1: Determine whether the pump pit is a single-pump pit or a double-pump pit; S2: Determine that it is a single-pump pit, and determine the type of the single pump in the single-pump pit: S21, determining that the single pump is a single pump at any time (21), and switching the power distribution board for the single pump to the daily maintenance power distribution board; S22, determining that the single pump is a single pump delay pump (22), and connecting adjacent distribution boards that supply power to the single pump via switches; S23, determining that the single pump is a single temporary pump (23), and connecting the power distribution board that supplies power to the single temporary pump to a temporary power source (42); S3: Determine that it is a dual-pump pit, and judge whether the distribution board that supplies power to the dual pumps (24) in the dual-pump pit is connected to two power supply columns. If the judgment is not, connect the distribution board that supplies power to the dual pumps (24) to the two power supply columns respectively.

2. The power distribution management method according to claim 1, characterized in that: There are 28 single-pump ready pumps (21) in the S21, and the daily maintenance distribution board connected to the single-pump ready pumps (21) is connected to the overhaul power supply (41) and the daily power supply through a double-cut power switch (11).

3. The power distribution management method according to claim 2, characterized in that: In the step S21, the LKZ switchboard is used to power the daily maintenance switchboard, and the power supply for the LKZ switchboard is the overhaul period power supply (41), that is, the LKZ switchboard has power during the overhaul period.

4. The power distribution management method according to claim 1, characterized in that: There are eight single-pump delay pumps (22) in S22, and the adjacent distribution boards connected to the single-pump delay pumps (22) are connected via the switch, or each distribution board is connected to the two power supply columns via the double-cut power switch (11).

5. The power distribution management method according to claim 4, characterized in that: In the step S22, the power supplies for the adjacent distribution boards are the two columns of power supplies.

6. The power distribution management method according to claim 1, characterized in that: There is one single-pump temporary pump (23) in S23, and the distribution board connected to the single-pump temporary pump (23) is connected to the temporary power supply (42) and the daily power supply through a double-cut power switch (11).

7. The power distribution management method according to claim 1, characterized in that: The two power supply columns in S3 are power supply columns A and B, and the power supply columns A and B are not powered off at the same time during the overhaul.

8. The power distribution management method according to claim 7, characterized in that: There are 7 dual-pump pits in S3, and the two distribution boards of the dual pumps (24) in each dual-pump pit are connected. Each distribution board is connected to the two power supply columns through a double-cut power switch (11).

9. A power distribution management system using the power distribution management method according to any one of claims 1 to 8, characterized in that: include: A power supply module, the power supply module includes a daily power supply, a temporary power supply (42) and an overhaul power supply (41); the daily power supply includes two power supply columns, the two power supply columns are not powered off at the same time during the overhaul, the temporary power supply (42) is a temporary power supply, and the overhaul power supply (41) is a power supply for the equipment during the overhaul; a judgment module, the judgment module judging the type of the single pump in the single-pump pump pit and the type of power supply for the switchboard supplying power to the dual pumps (24) in the dual-pump pump pit; A control module controls whether the single pump and the dual pump (24) are powered during overhaul.

10. The power distribution management system according to claim 9, characterized in that: The judgment module includes a first judgment module and a second judgment module, wherein the first judgment module judges the type of the single pump of the single pump pit during overhaul, and the second judgment module judges the type of power supply connected to the switchboard of the dual pump (24) during overhaul; The control module includes a first control module and a second control module. The first control module controls the single pump at any time (21) to be powered during the overhaul, extends the power off time of the switchboard of the single pump delay pump (22) so that the corresponding single pump pit is drained and then shut down, and controls the temporary pump (23) to be powered. The second control module controls at least one of the dual pumps (24) to be powered during the overhaul.

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