A method and system for full flow testing of a pressurized water reactor core safety injection system

Abstract

This invention relates to a method and system for a full-flow test of a pressurized water reactor core safety injection system, comprising: step S1, starting a first high-pressure safety injection pump; step S2, during the operation of the first high-pressure safety injection pump, collecting the flow rate of the first high-pressure safety injection pump; step S3, determining whether the flow rate of the first high-pressure safety injection pump is within a preset flow range; step S4, if yes, determining that the first high-pressure safety injection pump is qualified and controlling the first high-pressure safety injection pump to stop; step S5, if no, adjusting the opening of the regulating valve to make the flow rate of the first high-pressure safety injection pump within the preset flow range, and executing step S4 after the flow rate of the first high-pressure safety injection pump is within the preset flow range; step S6, after the first high-pressure safety injection pump stops, continuing the full-flow test. This invention eliminates the need for multiple on-site readings; there is no need to stop the pump to record data during the test; the test qualification can be intuitively determined based on the flow rate; and other pumps can be verified only after the first pump has passed the test.

Description

Technical Field

[0001] This invention relates to the technical field of pressurized water reactors, and more specifically, to a full-flow test method and system for a pressurized water reactor core safety injection system. Background Technology

[0002] To verify the safety performance of the Safety Injection System (RIS) in pressurized water reactor nuclear power plants, system flow tests are typically conducted to ensure that parameters such as system flow and pressure meet design requirements.

[0003] The RIS high-pressure safety injection full-flow test is a periodic test that affects nuclear safety. However, based on feedback from the operational experience of existing pressurized water reactor nuclear power plants, the RIS high-pressure safety injection full-flow test still has some shortcomings.

[0004] The full-flow test for each specific RIS high-pressure safety injection pump (RCV001 / 002 / 003PO) must be conducted individually. This requires multiple people to operate the test, and the procedures are cumbersome, presenting significant uncertainties and difficulties, primarily as follows:

[0005] (1) Due to limitations in test conditions, the pump must be stopped each time to record the reactor pool level n'. If the test result (ΔH, Q) is unqualified, the pump must be restarted to adjust the flow rate, and then stopped again to verify whether the test result is qualified. Since RCV001 / 002 / 003PO is an important nuclear-grade pump, if the test fails and the number of consecutive pump starts exceeds the specification (the maximum number of consecutive pump starts is 6 in cold state and 5 in hot state), the test must be terminated, which greatly increases the test duration. The existing test method has the defect of "not being able to adjust the flow rate without stopping the pump".

[0006] (2) According to the test procedure, when the first pump is tested, the flow rates q1, q2, and q3 of the three injection branch pipes do not meet the acceptance criterion of (A+dA). On-site, the flow rates of the three injection branch pipes need to be adjusted by manually adjusting the opening of the valve. This process is a "blind adjustment," and the flow rate can only be adjusted based on experience and by repeatedly starting and stopping the pump, which is not conducive to the execution of the test. The existing test method has the defect of "not being able to intuitively judge the test results as qualified based on the on-site flow rate."

[0007] (3) During the test, the flow rate of the second and third pumps is not allowed to be adjusted using regulating valves. If the second and third pumps cannot meet the acceptance criteria at the same time, the full flow test of the three pumps will fail and the test will need to be restarted. The existing test method has the defect of "not being able to determine the most reasonable range of total flow rate of the test pumps". Summary of the Invention

[0008] The technical problem to be solved by the present invention is to provide a full-flow test method and system for a pressurized water reactor core safety injection system, addressing the deficiencies of the prior art.

[0009] The technical solution adopted by this invention to solve its technical problem is: constructing a full-flow test method for a pressurized water reactor core safety injection system, comprising:

[0010] Step S1: Start the first high-pressure safety injection pump;

[0011] Step S2: During the operation of the first high-pressure safety injection pump, the flow rate of the first high-pressure safety injection pump is collected;

[0012] Step S3: Determine whether the flow rate of the first high-pressure injection pump is within the preset flow rate range;

[0013] Step S4: If yes, then determine that the first high-pressure safety injection pump is qualified and control the first high-pressure safety injection pump to stop;

[0014] Step S5: If not, adjust the opening of the regulating valve to make the flow rate of the first high-pressure ampoule pump within the preset flow rate range, and execute step S4 after the flow rate of the first high-pressure ampoule pump is within the preset flow rate range.

[0015] Step S6: After the first high-pressure injection pump stops, continue to perform the full-flow test.

[0016] In the full-flow test method for the pressurized water reactor core safety injection system described in this invention, the procedure prior to step S2 includes:

[0017] Step S2-01: Adjust the opening of the regulating valve;

[0018] Step S2-02: Collect the flow rate of the first injection branch pipe, the flow rate of the second injection branch pipe, and the flow rate of the third injection branch pipe;

[0019] Step S2-03: Determine whether the flow rates of the first injection branch pipe, the second injection branch pipe, and the third injection branch pipe are within the standard range;

[0020] If so, proceed to step S2-04.

[0021] In the full-flow test method for the pressurized water reactor core safety injection system described in this invention, step S5 includes:

[0022] Step S51: During the process of adjusting the opening of the regulating valve, monitor the flow rate of the first injection branch pipe, the flow rate of the second injection branch pipe, and the flow rate of the third injection branch pipe.

[0023] Step S52: Determine whether the preset conditions are met based on the flow rate of the first injection branch pipe, the flow rate of the second injection branch pipe, and the flow rate of the third injection branch pipe.

[0024] Step S53: If yes, determine that the flow rate of the first high-pressure injection pump is within the preset flow rate range; if no, continue to adjust the regulating valve.

[0025] In the full-flow test method for the pressurized water reactor core safety injection system described in this invention, step S52 includes:

[0026] Obtain the maximum value among the flow rates of the first injection branch pipe, the second injection branch pipe, and the third injection branch pipe;

[0027] Obtain the minimum value among the flow rates of the first injection branch pipe, the second injection branch pipe, and the third injection branch pipe;

[0028] The difference between the maximum value and the minimum value is obtained by subtracting the maximum value from the minimum value.

[0029] When determining the difference, it is necessary to determine whether a preset condition is met.

[0030] If so, then determine that the flow rate of the first high-pressure injection pump is within the preset flow rate range;

[0031] If not, proceed to step S54.

[0032] In the full-flow test method for the pressurized water reactor core safety injection system described in this invention, step S6 includes:

[0033] Step S61: Start the second high-pressure safety injection pump;

[0034] Step S62: During the operation of the second high-pressure safety injection pump, the flow rate of the second high-pressure safety injection pump is collected;

[0035] Step S63: Determine whether the flow rate of the second high-pressure injection pump is within the preset flow rate range;

[0036] Step S64: If yes, then determine that the second high-pressure safety pump is qualified and control the second high-pressure safety pump to stop;

[0037] If not, in step S65, adjust the opening of the regulating valve to make the flow rate of the second high-pressure safety pump within the preset flow rate range, and execute step S64 after the flow rate of the second high-pressure safety pump is within the preset flow rate range.

[0038] In the full-flow test method for the pressurized water reactor core safety injection system described in this invention, step S65 includes:

[0039] Step S651: During the process of adjusting the opening of the regulating valve, monitor the flow rate of the first injection branch pipe, the flow rate of the second injection branch pipe, and the flow rate of the third injection branch pipe.

[0040] Step S652: Determine whether the preset conditions are met based on the flow rate of the first injection branch pipe, the flow rate of the second injection branch pipe, and the flow rate of the third injection branch pipe.

[0041] Step S653: If yes, determine that the flow rate of the second high-pressure injection pump is within the preset flow rate range; if no, continue to adjust the regulating valve.

[0042] In the full-flow test method for the pressurized water reactor core safety injection system described in this invention, the method further includes:

[0043] Step S71: After the second high-pressure safety injection pump stops, start the third high-pressure safety injection pump;

[0044] Step S72: During the operation of the third high-pressure safety injection pump, the flow rate of the third high-pressure safety injection pump is collected;

[0045] Step S73: Determine whether the flow rate of the third high-pressure injection pump is within the preset flow rate range;

[0046] Step S74: If yes, then determine that the third high-pressure safety injection pump is qualified and control the third high-pressure safety injection pump to stop;

[0047] Step S75: If not, adjust the opening of the regulating valve to make the flow rate of the third high-pressure safety pump within the preset flow rate range, and execute step S74 after the flow rate of the third high-pressure safety pump is within the preset flow rate range.

[0048] In the full-flow test method for the pressurized water reactor core safety injection system described in this invention, step S75 includes:

[0049] Step S751: During the process of adjusting the opening of the regulating valve, monitor the flow rate of the first injection branch pipe, the flow rate of the second injection branch pipe, and the flow rate of the third injection branch pipe.

[0050] Step S752: Determine whether the preset conditions are met based on the flow rate of the first injection branch pipe, the flow rate of the second injection branch pipe, and the flow rate of the third injection branch pipe.

[0051] Step S753: If yes, then determine that the flow rate of the third high-pressure injection pump is within the preset flow rate range;

[0052] Step S754: If not, continue adjusting the regulating valve.

[0053] The present invention also provides a full-flow test system for a pressurized water reactor core safety injection system, comprising: a first high-pressure safety injection pump, a flow acquisition device for acquiring the flow of the first high-pressure safety injection pump, a regulating valve for adjusting the flow of the branch pipe, and a control unit;

[0054] The control unit is used for:

[0055] Start the first high-pressure safety injection pump;

[0056] During the operation of the first high-pressure safety pump, the flow rate of the first high-pressure safety pump is collected;

[0057] Determine whether the flow rate of the first high-pressure injection pump is within the preset flow rate range;

[0058] If so, the first high-pressure safety pump is deemed qualified and is controlled to stop.

[0059] If not, adjust the opening of the regulating valve to make the flow rate of the first high-pressure ampoule pump within the preset flow rate range, and control the first regulating ampoule pump to stop after the flow rate of the first high-pressure ampoule pump is within the preset flow rate range;

[0060] After the first high-pressure injection pump stops, the full-flow test continues.

[0061] The pressurized water reactor core safety injection system full-flow test system described in this invention also includes: a refueling tank, a second high-pressure safety injection pump, a third high-pressure safety injection pump, a first safety injection branch pipe, a second safety injection branch pipe, a third safety injection branch pipe, and a reactor water pool;

[0062] The input end of the first high-pressure safety injection pump is connected to the refueling box, and the output end of the first high-pressure safety injection pump is connected to the input ends of the first safety injection branch pipe, the second safety injection branch pipe, and the third safety injection branch pipe, respectively. The second high-pressure safety injection pump and the third high-pressure safety injection pump are arranged in parallel with the first high-pressure safety injection pump in sequence. The output ends of the first safety injection branch pipe, the second safety injection branch pipe, and the third safety injection branch pipe are respectively connected to the corresponding input ports of the reactor pool.

[0063] The full-flow test method and system for the pressurized water reactor core safety injection system of the present invention has the following beneficial effects: It includes the following steps: Step S1, starting the first high-pressure safety injection pump; Step S2, during the operation of the first high-pressure safety injection pump, collecting the flow rate of the first high-pressure safety injection pump; Step S3, determining whether the flow rate of the first high-pressure safety injection pump is within a preset flow range; Step S4, if yes, determining that the first high-pressure safety injection pump is qualified and controlling the first high-pressure safety injection pump to stop; Step S5, if no, adjusting the opening of the regulating valve to make the flow rate of the first high-pressure safety injection pump within the preset flow range, and executing Step S4 after the flow rate of the first high-pressure safety injection pump is within the preset flow range; Step S6, after the first high-pressure safety injection pump stops, continuing the full-flow test. The present invention eliminates the need for multiple on-site readings; there is no need to stop the pump to record data during the test; the test qualification can be intuitively determined based on the flow rate; and other pumps can be verified only after the first pump has passed the test. Attached Figure Description

[0064] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0065] Figure 1 This is a schematic flowchart of Embodiment 1 of the pressurized water reactor core safety injection system full-flow test method provided by the present invention;

[0066] Figure 2 This is a schematic flowchart of Embodiment 2 of the full-flow test method for the pressurized water reactor core safety injection system provided by the present invention;

[0067] Figure 3 This is a schematic flowchart of Embodiment 3 of the full-flow test method for the pressurized water reactor core safety injection system provided by the present invention;

[0068] Figure 4 This is a schematic flowchart of Embodiment 4 of the full-flow test method for the pressurized water reactor core safety injection system provided by the present invention;

[0069] Figure 5 This is a schematic flowchart of Embodiment 5 of the full-flow test method for the pressurized water reactor core safety injection system provided by the present invention;

[0070] Figure 6 This is a schematic flowchart of Embodiment Six of the Pressurized Water Reactor Core Safety Injection System Full Flow Test Method provided by the present invention;

[0071] Figure 7 This is a schematic flowchart of Embodiment 7 of the pressurized water reactor core safety injection system full-flow test method provided by the present invention;

[0072] Figure 8 This is a schematic diagram of the full-flow test principle of the pressurized water reactor core safety injection system provided by the present invention;

[0073] Figure 9 This is a schematic diagram of the optimal pump flow rate range provided by the present invention. Detailed Implementation

[0074] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0075] refer to Figure 8 This is a schematic diagram of the full-flow test of the pressurized water reactor core safety injection system provided by the present invention.

[0076] like Figure 8 As shown, the full-flow test system for the pressurized water reactor core safety injection system includes: a first high-pressure safety injection pump, a flow acquisition device (not shown) for collecting data from the first high-pressure safety injection pump, a regulating valve (not shown) for adjusting the flow in the branch pipe, and a control unit (not shown). Furthermore, the full-flow test system for the pressurized water reactor core safety injection system also includes: a refueling tank, a second high-pressure safety injection pump, a third high-pressure safety injection pump, a first safety injection branch pipe, a second safety injection branch pipe, a third safety injection branch pipe, and a reactor water pool.

[0077] The input end of the first high-pressure safety injection pump is connected to the refueling box, and the output end of the first high-pressure safety injection pump is connected to the input ends of the first, second, and third safety injection branch pipes, respectively. The second and third high-pressure safety injection pumps are connected in parallel with the first high-pressure safety injection pump. The output ends of the first, second, and third safety injection branch pipes are respectively connected to the corresponding input ports of the reactor pool. Figure 9 RCV001PO is the first high-pressure safety injection pump, RCV002PO is the second high-pressure safety injection pump, RCV003PO is the third high-pressure safety injection pump, and RTR001BA is the material changing box.

[0078] like Figure 8 As shown, during the full-flow test, the control unit executes the following steps: starting the first high-pressure safety pump; during the operation of the first high-pressure safety pump, collecting the flow rate of the first high-pressure safety pump; determining whether the flow rate of the first high-pressure safety pump is within the preset flow range; if yes, determining that the first high-pressure safety pump is qualified and controlling the first high-pressure safety pump to stop; if no, adjusting the opening of the regulating valve to make the flow rate of the first high-pressure safety pump within the preset flow range, and controlling the first regulating safety pump to stop after the flow rate of the first high-pressure safety pump is within the preset flow range; after the first high-pressure safety pump stops, continuing to execute the full-flow test.

[0079] For details, please refer to Figure 1 This is a flowchart illustrating an embodiment of the full-flow test method for the pressurized water reactor core safety injection system provided by the present invention.

[0080] like Figure 1 As shown, in this embodiment, the full-flow test method for the pressurized water reactor core safety injection system includes:

[0081] Step S1: Start the first high-pressure injection pump.

[0082] Step S2: During the operation of the first high-pressure safety pump, the flow rate of the first high-pressure safety pump is collected.

[0083] Optionally, in some embodiments, such as Figure 2 As shown, the steps preceding step S2 include:

[0084] Step S2-01: Adjust the opening of the regulating valve.

[0085] Step S2-02: Collect the flow rates of the first injection branch pipe, the second injection branch pipe, and the third injection branch pipe.

[0086] Step S2-03: Determine whether the flow rates of the first injection branch pipe, the second injection branch pipe, and the third injection branch pipe are within the standard range.

[0087] If so, proceed to step S2-04.

[0088] Optionally, in this embodiment of the invention, the standard range is: 48±0.6m 3 / h.

[0089] Specifically, after starting the first high-pressure safety injection pump, the flow rates of the first safety injection branch (q1), the second safety injection branch (q2), and the third safety injection branch (q3) can all be adjusted to 48±0.6m³ by adjusting the opening of the regulating valve on site. 3 / h, and then collect the flow rate of the first high-pressure injection pump.

[0090] Step S3: Determine whether the flow rate of the first high-pressure injection pump is within the preset flow rate range.

[0091] Optionally, in order to adjust the flow rate without stopping the pump, in this embodiment of the invention, the preset flow rate range is set to 140.9 m³ / s. 3 / h~144.6m 3 / h. Specifically, such as Figure 9 As shown, when the pump flow rate is 140.9 m³ / s... 3 / h~144.6m 3 Between / h, regardless of any value of ΔH (the correction value for the elevation of the refueling tank and the reactor pool) between -6.1m and 16.4m, the pump flow rate Q meets the acceptance criteria, thus achieving the purpose of adjusting the flow rate without stopping the pump.

[0092] Step S4: If yes, then determine that the first high-pressure safety injection pump is qualified and control the first high-pressure safety injection pump to stop.

[0093] If not, in step S5, adjust the opening of the regulating valve to make the flow rate of the first high-pressure ampoule pump within the preset flow rate range, and execute step S4 after the flow rate of the first high-pressure ampoule pump is within the preset flow rate range.

[0094] In some embodiments, such as Figure 3 As shown, step S5 includes:

[0095] Step S51: During the process of adjusting the opening of the regulating valve, monitor the flow rate of the first injection branch pipe, the flow rate of the second injection branch pipe, and the flow rate of the third injection branch pipe.

[0096] Step S52: Determine whether the preset conditions are met based on the flow rates of the first injection branch pipe, the second injection branch pipe, and the third injection branch pipe.

[0097] Optionally, in this embodiment of the invention, step S52 includes: obtaining the maximum value among the flow rates of the first injection branch pipe, the second injection branch pipe, and the third injection branch pipe; obtaining the minimum value among the flow rates of the first injection branch pipe, the second injection branch pipe, and the third injection branch pipe; subtracting the maximum value from the minimum value to obtain the difference between the maximum value and the minimum value; determining whether the difference meets a preset condition; if yes, determining that the flow rate of the first high-pressure injection pump is within the preset flow rate range; if no, executing step S54.

[0098] Optionally, in the embodiments of the invention, the preset condition is: max(q1, q2, q3) - min(q1, q2, q3) ≤ 1.2. Wherein, q1 is the flow rate of the first injection branch pipe, q2 is the flow rate of the second injection branch pipe, and q3 is the flow rate of the third injection branch pipe.

[0099] Specifically, when max(q1, q2, q3) - min(q1, q2, q3) ≤ 1.2, A + dA ≤ 4.5% holds true. Therefore, when adjusting the flow rate on-site via the regulating valve, it is only necessary to consider whether the flow rates of the three injection branch pipes meet the condition max(q1, q2, q3) - min(q1, q2, q3) ≤ 1.2 to determine whether the acceptance criterion A + dA ≤ 4.5% is satisfied. This method avoids "blind adjustment" and saves a significant amount of testing time. Here, A represents the flow rate mismatch value of the three injection branch pipes, and dA represents the instrument measurement error value.

[0100] Step S53: If yes, determine that the flow rate of the first high-pressure injection pump is within the preset flow rate range; if no, continue to adjust the regulating valve.

[0101] Step S6: After the first high-pressure injection pump stops, continue to perform the full-flow test.

[0102] In some embodiments, such as Figure 4 As shown, step S6 includes:

[0103] Step S61: Start the second high-pressure injection pump.

[0104] Step S62: During the operation of the second high-pressure safety pump, the flow rate of the second high-pressure safety pump is collected.

[0105] Step S63: Determine whether the flow rate of the second high-pressure injection pump is within the preset flow rate range.

[0106] Step S64: If yes, then determine that the second high-pressure safety pump is qualified and control the second high-pressure safety pump to stop.

[0107] If not, in step S65, adjust the opening of the regulating valve to make the flow rate of the second high-pressure safety pump within the preset flow rate range, and execute step S64 after the flow rate of the second high-pressure safety pump is within the preset flow rate range.

[0108] In some embodiments, such as Figure 5 As shown, step S65 includes:

[0109] Step S651: During the process of adjusting the opening of the regulating valve, monitor the flow rate of the first injection branch pipe, the flow rate of the second injection branch pipe, and the flow rate of the third injection branch pipe.

[0110] Step S652: Determine whether the preset conditions are met based on the flow rates of the first injection branch pipe, the second injection branch pipe, and the third injection branch pipe.

[0111] Step S653: If yes, determine that the flow rate of the second high-pressure injection pump is within the preset flow rate range; if no, continue to adjust the regulating valve.

[0112] Understandably, in this embodiment of the invention, the same test method as that used for the first high-pressure safety pump is employed when testing the second high-pressure safety pump.

[0113] In some embodiments, such as Figure 6 As shown, the full-flow test method for the pressurized water reactor core safety injection system also includes:

[0114] Step S71: After the second high-pressure safety pump stops, start the third high-pressure safety pump.

[0115] Step S72: During the operation of the third high-pressure safety injection pump, the flow rate of the third high-pressure safety injection pump is collected.

[0116] Step S73: Determine whether the flow rate of the third high-pressure injection pump is within the preset flow rate range.

[0117] Step S74: If yes, then determine that the third high-pressure safety pump is qualified and control the third high-pressure safety pump to stop.

[0118] If not, in step S75, adjust the opening of the regulating valve to make the flow rate of the third high-pressure safety pump within the preset flow range, and execute step S74 after the flow rate of the third high-pressure safety pump is within the preset flow range.

[0119] In some embodiments, such as Figure 7 As shown, step S75 includes:

[0120] Step S751: During the process of adjusting the opening of the regulating valve, monitor the flow rate of the first injection branch pipe, the flow rate of the second injection branch pipe, and the flow rate of the third injection branch pipe.

[0121] Step S752: Determine whether the preset conditions are met based on the flow rates of the first injection branch pipe, the second injection branch pipe, and the third injection branch pipe.

[0122] Step S753: If yes, then determine that the flow rate of the third high-pressure injection pump is within the preset flow rate range.

[0123] Step S754: If not, continue adjusting the regulating valve.

[0124] Similarly, in this embodiment of the invention, after determining that the second high-pressure safety pump is qualified, the third high-pressure safety pump is tested, and the third high-pressure safety pump is tested using the same test method as the first high-pressure safety pump.

[0125] Specifically, based on historical testing methods, the flow rate of the second and third high-pressure safety injection pumps could not be adjusted by operating the regulating valve during testing, resulting in uncontrollable test results for these pumps. Let the flow rates of the three pumps be Q1, Q2, and Q3, respectively. If Q1 > Q2 > Q3, and all pumps meet the acceptance criteria, then the ideal distribution range of Q1, Q2, and Q3 according to the acceptance criteria should be as shown in the attached figure. Figure 9 As shown, during the initial test, the flow rate Q1 of the pump was adjusted to the upper third of the revised acceptance criteria (140.9 m³ / h to 144.6 m³ / h). The flow rate Q2 for the second pump was within the middle third of the revised acceptance criteria, and the flow rate Q3 for the third pump was similarly within the lower third of the revised acceptance criteria. Therefore, the test results for the second and third pumps changed from uncontrollable to indirectly controllable, significantly increasing the probability of a successful test for all three pumps on the first attempt.

[0126] This invention eliminates the need for multiple on-site counters; only the pump flow rate and the flow rates of the three safety injection branch pipes need to be read. Therefore, it significantly reduces on-site operational steps and dramatically improves the first-time success rate of the test. During the test, there is no need to stop the pump to record data. Furthermore, flow rate adjustments are only required during the first high-pressure safety injection pump test. After the first high-pressure safety injection pump test results are satisfactory, the second and third high-pressure safety injection pumps are then tested sequentially.

[0127] The average test duration of this invention is approximately 1 to 1.5 hours, compared to the traditional approach which requires an average of 3 hours per test. This invention can save an average of 1.5 hours or more of the critical path time per unit overhaul. Based on the estimated hourly power generation of each 1,000-kilowatt-class unit, this translates to savings of hundreds of thousands of yuan per unit per year, significantly reducing unit costs. Furthermore, the first-pass yield of this invention is significantly higher than that of traditional tests.

[0128] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0129] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0130] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein can be implemented directly by hardware, a software module executed by a processor, or a combination of both. The software module can be located in random access memory (RAM), main memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.

[0131] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They do not limit the scope of protection of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A method of performing a full flow test of a pressurized water reactor core safety injection system, the method comprising: The method comprises the following steps: S1, starting a first high-pressure injection pump; S2, collecting the flow of the first high-pressure injection pump during the operation of the first high-pressure injection pump; Before the step S2, the method comprises the following steps: S2-01, adjusting the opening of the regulating valve; S2-02, collecting the flow of the first injection branch pipe, the flow of the second injection branch pipe and the flow of the third injection branch pipe; S2-03, judging whether the flow of the first injection branch pipe, the flow of the second injection branch pipe and the flow of the third injection branch pipe are within the standard range; S2-04, if yes, executing the step S2; S3, judging whether the flow of the first high-pressure injection pump is within a preset flow range; The preset flow range is a range in which the flow of the first high-pressure injection pump meets the acceptance criteria when the exchange tank and the reactor pool elevation correction value are any value; S4, if yes, judging that the first high-pressure injection pump is qualified and controlling the first high-pressure injection pump to stop; S5, if no, adjusting the opening of the regulating valve so that the flow of the first high-pressure injection pump is within the preset flow range, and executing the step S4 after the flow of the first high-pressure injection pump is within the preset flow range; 2. The pressurized water reactor core safety injection system full flow test method of claim 1, wherein, The preset flow range is a range in the upper third of the corrected acceptance criteria; The step S5 comprises the following steps: S51, monitoring the flow of the first injection branch pipe, the flow of the second injection branch pipe and the flow of the third injection branch pipe during the adjustment of the opening of the regulating valve; S52, judging whether a preset condition is met according to the flow of the first injection branch pipe, the flow of the second injection branch pipe and the flow of the third injection branch pipe; S53, if yes, judging that the flow of the first high-pressure injection pump is within the preset flow range; if no, continuing to adjust the regulating valve; The step S52 comprises the following steps: obtaining the maximum value of the flow of the first injection branch pipe, the flow of the second injection branch pipe and the flow of the third injection branch pipe; obtaining the minimum value of the flow of the first injection branch pipe, the flow of the second injection branch pipe and the flow of the third injection branch pipe; obtaining the difference between the maximum value and the minimum value by subtracting the minimum value from the maximum value; judging whether the preset condition is met according to the difference; if yes, judging that the flow of the first high-pressure injection pump is within the preset flow range; if no, executing the step S54; S6, continuing to execute the full-flow test after the first high-pressure injection pump stops. The step S6 comprises the following steps: S61, starting a second high-pressure injection pump; S62, collecting the flow of the second high-pressure injection pump during the operation of the second high-pressure injection pump; S63, judging whether the flow of the second high-pressure injection pump is within a preset flow range; S64, if yes, judging that the second high-pressure injection pump is qualified and controlling the second high-pressure injection pump to stop; S65, if no, adjusting the opening of the regulating valve so that the flow of the second high-pressure injection pump is within the preset flow range, and executing the step S64 after the flow of the second high-pressure injection pump is within the preset flow range.

3. The pressurized water reactor core safety injection system full flow test method of claim 2, wherein, The step S65 comprises: Step S651, monitoring the flow of the first injection branch pipe, the flow of the second injection branch pipe and the flow of the third injection branch pipe during the adjustment of the opening of the adjusting valve; Step S652, judging whether the preset condition is met according to the flow of the first injection branch pipe, the flow of the second injection branch pipe and the flow of the third injection branch pipe; Step S653, if yes, judging that the flow of the second high-pressure injection pump is within the preset flow range; if no, continuing to adjust the adjusting valve.

4. The pressurized water reactor core safety injection system full flow test method of claim 2, wherein, The method further comprises: Step S71, starting the third high-pressure injection pump after the second high-pressure injection pump stops; Step S72, collecting the flow of the third high-pressure injection pump during the operation of the third high-pressure injection pump; Step S73, judging whether the flow of the third high-pressure injection pump is within the preset flow range; Step S74, if yes, judging that the third high-pressure injection pump is qualified and controlling the third high-pressure injection pump to stop; Step S75, if no, adjusting the opening of the adjusting valve to make the flow of the third high-pressure injection pump within the preset flow range, and executing step S74 after the flow of the third high-pressure injection pump is within the preset flow range.

5. The pressurized water reactor core safety injection system full flow test method of claim 4, wherein, The step S75 comprises: Step S751, monitoring the flow of the first injection branch pipe, the flow of the second injection branch pipe and the flow of the third injection branch pipe during the adjustment of the opening of the adjusting valve; Step S752, judging whether the preset condition is met according to the flow of the first injection branch pipe, the flow of the second injection branch pipe and the flow of the third injection branch pipe; Step S753, if yes, judging that the flow of the third high-pressure injection pump is within the preset flow range; Step S754, if no, continuing to adjust the adjusting valve.

6. A pressurized water reactor core safety injection system full flow test system, characterized by, It comprises: A first high-pressure injection pump, a flow collecting device for collecting the flow of the first high-pressure injection pump, an adjusting valve for adjusting the flow of the branch pipe, and a control unit; The control unit is used for: Starting the first high-pressure injection pump; Adjusting the opening of the adjusting valve; collecting the flow of the first injection branch pipe, the flow of the second injection branch pipe and the flow of the third injection branch pipe; judging whether the flow of the first injection branch pipe, the flow of the second injection branch pipe and the flow of the third injection branch pipe are within the standard range; if yes, continuing; Collecting the flow of the first high-pressure injection pump during the operation of the first high-pressure injection pump; The preset flow range is a range in which the flow of the first high-pressure injection pump meets the acceptance criteria after the correction of the level of the refueling tank and the reactor pool; Judging whether the flow of the first high-pressure injection pump is within the preset flow range; If yes, judging that the first high-pressure injection pump is qualified and controlling the first high-pressure injection pump to stop; If no, adjusting the opening of the adjusting valve to make the flow of the first high-pressure injection pump within the preset flow range, and controlling the first adjusting injection pump to stop after the flow of the first high-pressure injection pump is within the preset flow range; the preset flow range is a range within the upper third of the acceptance criteria after the correction. If not, the opening of the adjusting valve is adjusted to make the flow of the first high-pressure injection pump within a preset flow range, and after the flow of the first high-pressure injection pump is within the preset flow range, the first adjusting injection pump is controlled to stop, comprising: During the adjustment of the opening of the adjusting valve, the flow of the first injection branch pipe, the flow of the second injection branch pipe and the flow of the third injection branch pipe are monitored; whether a preset condition is met is judged according to the flow of the first injection branch pipe, the flow of the second injection branch pipe and the flow of the third injection branch pipe; if yes, it is judged that the flow of the first high-pressure injection pump is within the preset flow range; if not, the adjusting valve is continuously adjusted; Whether the preset condition is met according to the flow of the first injection branch pipe, the flow of the second injection branch pipe and the flow of the third injection branch pipe, comprising: obtaining the maximum value of the flow of the first injection branch pipe, the flow of the second injection branch pipe and the flow of the third injection branch pipe; obtaining the minimum value of the flow of the first injection branch pipe, the flow of the second injection branch pipe and the flow of the third injection branch pipe; the difference between the maximum value and the minimum value is obtained; whether the preset condition is met is judged; if yes, it is judged that the flow of the first high-pressure injection pump is within the preset flow range; if not, step S54 is executed; After the first high-pressure injection pump stops, the full-flow test is continuously executed.

7. The pressurized water reactor core safety injection system full flow test system in accordance with claim 6, characterized in that, Further comprising: a refueling tank, a second high-pressure injection pump, a third high-pressure injection pump, a first injection branch pipe, a second injection branch pipe, a third injection branch pipe and a reactor pool; The input end of the first high-pressure injection pump is connected with the refueling tank, the output end of the first high-pressure injection pump is connected with the input end of the first injection branch pipe, the input end of the second injection branch pipe and the input end of the third injection branch pipe respectively, the second high-pressure injection pump and the third high-pressure injection pump are arranged in parallel with the first high-pressure injection pump in sequence; the output end of the first injection branch pipe, the output end of the second injection branch pipe and the output end of the third injection branch pipe are connected with the corresponding input ports of the reactor pool respectively.

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