A test device and method for functional verification of a secondary circuit water supply system of a nuclear power plant

Abstract

A test device and method for functional verification of a secondary water supply system of a nuclear power plant, comprising a deaerator, a feedwater pre-pump inlet isolation valve, a feedwater pre-pump, a main feedwater pump, a standby feedwater pump, a minimum flow recirculation valve, a main feedwater isolation valve, a main feedwater regulating valve, a steam generator, a deaerator liquid level monitoring device and a feedwater flow monitoring device. Each test signal of the secondary water supply system of a nuclear power plant is connected to a simulation modeling server through a DCS cabinet of the secondary water supply system of the nuclear power plant via a PXI data acquisition cabinet. The present invention can realize early verification of the actual function of the secondary water supply system of a nuclear power plant and improve the test efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of secondary water supply systems of nuclear power plants, and in particular relates to a testing device and method for functional verification of secondary water supply systems of nuclear power plants. Background Art

[0002] The secondary feed water system delivers qualified secondary feed water to the steam generator. The feed water absorbs reactor heat to generate steam to drive the steam turbine generator set to convert thermal energy into electrical energy. It is an important part of a nuclear power plant.

[0003] The secondary feedwater system of a nuclear power plant consists of a deaerator, feedwater pre-pump, main feedwater pump, standby feedwater pump, steam generator, pipes and valves. In order to ensure the safe and stable operation of the nuclear power plant, functional verification of the control logic of the secondary feedwater system is crucial.

[0004] In the traditional testing process, testers often modify the logic of the nuclear power plant digital control system (DCS), manually wire the system control cabinet, manually force the signal, and manually read the DCS display status to test. This testing method has at least the following problems: when the operating conditions of the start-stop reactor system are complex and there are many measurements, the above manual testing method has the disadvantages of reading errors and errors in the test results, and the testing efficiency is low; at the same time, the DCS logic needs to be modified during the test to simulate various operating states of the system. Since the start-stop reactor system involves the full process operating conditions of the unit start-up, shutdown and power operation stages, the DCS logic involved is relatively wide. Directly modifying the DCS logic during the test will bring hidden dangers to the subsequent stable operation of the unit. The applicability of the above testing method is poor. Summary of the invention

[0005] In order to overcome the deficiencies of the above-mentioned prior art, the purpose of the present invention is to provide a testing device and method for functional verification of the secondary loop water supply system of a nuclear power plant, which can realize early verification of the actual function of the secondary loop water supply system of a nuclear power plant and improve the testing efficiency.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A test device for functional verification of a secondary circuit water supply system of a nuclear power plant, comprising:

[0008] Deaerator 1, connected to the inlet of feedwater pre-pump inlet isolation valve 2, is used to remove gas from water;

[0009] The water supply pre-pump inlet isolation valve 2, the outlet of which is connected to the inlet of the water supply pre-pump 3, is used to prevent leakage at the inlet of the water supply pre-pump 3;

[0010] The outlet of the water supply front pump 3 is divided into two routes: one route is connected to the inlet of the main water supply pump 4, and the other route is connected to the inlet of the standby water supply pump 5, which is used to increase the pressure entering the main water supply pump 4 and the standby water supply pump 5. The outlets of the main water supply pump 4 and the standby water supply pump 5 are divided into three routes after merging:

[0011] The first path is connected to the inlet of the minimum flow recirculation valve 6, and the outlet of the minimum flow recirculation valve 6 is connected to the inlet of the deaerator 1;

[0012] The second path is connected to the inlet of the main feedwater pump isolation valve 7, the outlet of the main feedwater pump isolation valve 7 is connected to the inlet of the main feedwater regulating valve 8, and the outlet of the main feedwater regulating valve 8 is connected to the inlet of the steam generator 9;

[0013] The third path is connected to the inlet of the water flow measurement device 11;

[0014] The water supply pre-pump inlet isolation valve 2, water supply pre-pump 3, main water supply pump 4, standby water supply pump 5, minimum flow recirculation valve 6, main water supply pump isolation valve 7, main water supply regulating valve 8, deaerator liquid level monitoring device 10, and water supply flow measuring device 11 are respectively connected to the simulation modeling server 14 through the secondary circuit water supply system DCS cabinet 12 and the PXI data acquisition cabinet 13.

[0015] A deaerator liquid level monitoring device 10 is disposed inside the deaerator 1 , and the deaerator liquid level monitoring device 10 is used to monitor the liquid level in the deaerator 1 .

[0016] The secondary circuit water supply system DCS cabinet 12 includes a DCS cabinet body and a deaerator liquid level measurement card 12-1, a minimum flow recirculation valve drive card 12-2, a main water supply pump drive card 12-3, a main water supply regulating valve drive card 12-4, a main water supply isolation valve drive card 12-5, a standby water supply pump drive card 12-6, a water supply pre-pump drive card 12-7, a water supply pre-pump inlet isolation valve drive card 12-8, and a water supply flow measurement device drive card 12-9.

[0017] Among them, the deaerator liquid level measurement card 12-1 is connected to the deaerator liquid level monitoring device 10, the minimum flow recirculation valve drive card 12-2 is connected to the minimum flow recirculation valve 6, the main water supply pump drive card 12-3 is connected to the main water supply pump 4, the main water supply regulating valve drive card 12-4 is connected to the main water supply regulating valve 8, the main water supply isolation valve drive card 12-5 is connected to the main water supply pump isolation valve 7, the standby water supply pump drive card 12-6 is connected to the standby water supply pump 5, the water supply pre-pump drive card 12-7 is connected to the water supply pre-pump 3, the water supply pre-pump inlet isolation valve drive card 12-8 is connected to the water supply pre-pump inlet isolation valve 2, and the water supply flow measurement device drive card 12-9 is connected to the water supply flow measurement device 11.

[0018] The PXI data acquisition cabinet 13 includes a data acquisition cabinet body and a deaerator liquid level measurement A / D conversion card 13-1, a minimum flow recirculation valve A / D conversion card 13-2, a main water supply pump A / D conversion card 13-3, a main water supply regulating valve A / D conversion card 13-4, a main water supply isolation valve A / D conversion card 13-5, a standby water supply pump A / D conversion card 13-6, a water supply pre-pump A / D conversion card 13-7, a water supply pre-pump inlet isolation valve A / D conversion card 13-8 and a water supply flow measurement device A / D conversion card 13-9 arranged in the data acquisition cabinet body;

[0019] The simulation modeling server 14 includes a deaerator level measurement simulation module 14-1, a minimum flow recirculation valve simulation module 14-2, a main feed water pump simulation module 14-3, a main feed water regulating valve simulation module 14-4, a main feed water isolation valve simulation module 14-5, a standby feed water pump simulation module 14-6, a feed water pre-pump simulation module 14-7, a feed water pre-pump inlet isolation valve simulation module 14-8 and a feed water flow measurement device simulation module 14-9;

[0020] Wherein, the deaerator liquid level measurement simulation module 14-1 is connected to the deaerator liquid level measurement card 12-1 via the deaerator liquid level measurement A / D conversion card 13-1;

[0021] The minimum flow recirculation valve simulation module 14-2 is connected to the minimum flow recirculation valve driving card 12-2 via the minimum flow recirculation valve A / D conversion card 13-2;

[0022] The main feed water pump simulation module 14-3 is connected to the main feed water pump drive card 12-3 via the main feed water pump A / D conversion card 13-3;

[0023] The main water supply regulating valve simulation module 14-4 is connected to the main water supply regulating valve driving card 12-4 via the main water supply regulating valve A / D conversion card 13-4;

[0024] The main water supply isolation valve simulation module 14-5 is connected to the main water supply isolation valve drive card 12-5 via the main water supply isolation valve A / D conversion card 13-5;

[0025] The standby feed water pump simulation module 14-6 is connected to the standby feed water pump driving card 12-6 via the standby feed water pump A / D conversion card 13-6;

[0026] The water supply pre-pump simulation module 14-7 is connected to the water supply pre-pump driving card 12-7 via the water supply pre-pump A / D conversion card 13-7;

[0027] The water supply pre-pump inlet isolation valve simulation module 14-8 is connected to the water supply pre-pump inlet isolation valve drive card 12-8 via the water supply pre-pump inlet isolation valve A / D conversion card 13-8;

[0028] The water supply flow measurement device simulation module 14-9 is connected to the water supply flow measurement device driving card 12-9 via the water supply flow measurement device A / D conversion card 13-9.

[0029] A method for using a test device for functional verification of a secondary water supply system in a nuclear power plant, the test contents including: (1) feedwater pre-pump start and stop test; (2) main feedwater pump and standby feedwater pump start, stop and switch test; (3) minimum flow recirculation valve functional verification; (4) main feedwater pump isolation valve and main feedwater regulating valve functional verification.

[0030] During the above test process, the controller parameters in the simulation modeling server 14 are repeatedly adjusted until the water supply pre-pump inlet isolation valve 2, the minimum flow recirculation valve 6, the main water supply pump isolation valve 7, and the main water supply regulating valve 8 meet the design functions, and the water supply pre-pump 3, the main water supply pump 4, and the standby water supply pump 5 meet the design functions.

[0031] The specific operation steps of the water supply pre-pump start and stop test are as follows:

[0032] The deaerator liquid level measurement simulation module 14-1 sets the liquid level in the deaerator 1 to be normal, and the liquid level signal output by the deaerator liquid level measurement simulation module 14-1 is transmitted to the deaerator liquid level measurement card 12-1 through the deaerator liquid level measurement A / D conversion card 13-1, and then transmitted to the deaerator liquid level monitoring device 10;

[0033] The simulation modeling server 14 triggers the water supply pre-pump start signal, which is transmitted by the water supply pre-pump simulation module 14-7 to the water supply pre-pump drive card 12-7 through the water supply pre-pump A / D conversion card 13-7 and drives the water supply pre-pump 3 to start, and tests the water supply pre-pump 3 start response characteristic curve; at the same time, the water supply pre-pump inlet isolation valve simulation module 14-8 transmits the signal to the water supply pre-pump inlet isolation valve drive card 12-8 through the water supply pre-pump inlet isolation valve A / D conversion card 13-8 and drives the water supply pre-pump inlet isolation valve 2 to open, and tests the opening time of the water supply pre-pump inlet isolation valve 2;

[0034] The liquid level in the deaerator 1 is set to a low level in the deaerator liquid level measurement simulation module 14-1, and the output low liquid level signal is transmitted to the deaerator liquid level measurement card 12-1 through the deaerator liquid level measurement A / D conversion card 13-1, and then transmitted to the deaerator liquid level monitoring device 10. The signal of the deaerator liquid level monitoring device 10 is transmitted to the DCS cabinet 12 of the secondary water supply system, and the water feed pre-pump driving card 12-7 drives the water feed pre-pump 3 to stop, and the stop response characteristic curve of the water feed pre-pump 3 is tested; at the same time, the water feed pre-pump inlet isolation valve driving card 12-8 drives the water feed pre-pump inlet isolation valve 2 to close, and the closing time of the water feed pre-pump inlet isolation valve 2 is tested;

[0035] The specific operation steps of starting, stopping and switching the main water supply pump and the standby water supply pump are as follows:

[0036] Initial state: the feedwater pre-pump 3 operates normally, the minimum flow recirculation valve 6 is fully open, and the main feedwater pump isolation valve 7 is fully closed;

[0037] The simulation modeling server 14 triggers the main feed water pump start signal, which is transmitted from the main feed water pump simulation module 14-3 to the main feed water pump drive card 12-3 through the main feed water pump A / D conversion card 13-3 and drives the main feed water pump 4 to start, and tests the start-up response characteristic curve of the main feed water pump 4; at the same time, the minimum flow recirculation valve simulation module 14-2 transmits the signal to the minimum flow recirculation valve drive card 12-2 through the minimum flow recirculation valve A / D conversion card 13-2 and drives the minimum flow recirculation valve 6 to open, and tests the opening time of the minimum flow recirculation valve 6;

[0038] The simulation modeling server 14 triggers the tripping signal of the main feed water pump, which is transmitted from the main feed water pump simulation module 14-3 to the main feed water pump drive card 12-3 through the main feed water pump A / D conversion card 13-3 and drives the main feed water pump 4 to stop, and tests the stop response characteristic curve of the main feed water pump 4; at the same time, the standby feed water pump drive card 12-6 drives the standby feed water pump 5 to start, and tests the start response characteristic curve of the standby feed water pump 5;

[0039] The simulation modeling server 14 triggers the tripping signal of the water supply pre-pump 3, and the water supply pre-pump driving card 12-7 drives the water supply pre-pump 3 to stop, and the stop signal of the water supply pre-pump 3 is transmitted to the water supply pre-pump simulation module 14-7 through the water supply pre-pump A / D conversion card 13-7, and the standby water supply pump simulation module 14-6 in the simulation modeling server 14 receives the tripping signal of the water supply pre-pump 3, which is transmitted to the standby water supply pump driving card 12-6 by the standby water supply pump A / D conversion card 13-6 and drives the standby water supply pump 5 to stop, and the stop response characteristic curve of the standby water supply pump 5 is tested;

[0040] The specific operation steps for the minimum flow recirculation valve function verification are as follows:

[0041] Initial state: the feedwater pre-pump 3 operates normally, the main feedwater pump 4 operates normally, the minimum flow recirculation valve 6 is fully open, and the main feedwater pump isolation valve 7 is fully closed;

[0042] The minimum flow recirculation valve simulation module 14-2 is set that the minimum flow recirculation valve 6 is not fully opened and the opening is less than 90%, which is transmitted by the minimum flow recirculation valve A / D conversion card 13-2 to the minimum flow recirculation valve drive card 12-2 and drives the minimum flow recirculation valve 6 to close to less than 90%; at the same time, when the water supply flow measurement device simulation module 14-9 receives the low water supply flow signal, the main water supply pump simulation module 14-3 in the simulation modeling server 14 receives the minimum flow recirculation valve 6 is not fully opened and the water supply flow is low Signal and triggers the main water supply pump tripping signal, which is transmitted by the main water supply pump simulation module 14-3 to the main water supply pump drive card 12-3 through the main water supply pump A / D conversion card 13-3 and drives the main water supply pump 4 to stop;

[0043] The minimum flow recirculation valve simulation module 14-2 is configured to gradually open the minimum flow recirculation valve 6 to 30%, 50% and 100%, which is transmitted from the minimum flow recirculation valve A / D conversion card 13-2 to the minimum flow recirculation valve drive card 12-2 and drives the minimum flow recirculation valve to open to the corresponding opening, and the opening characteristic curve of the minimum flow recirculation valve 6 is tested;

[0044] The minimum flow recirculation valve simulation module 14-2 is configured to gradually close the minimum flow recirculation valve 6 to 75%, 50% and 0%, which is transmitted from the minimum flow recirculation valve A / D conversion card 13-2 to the minimum flow recirculation valve drive card 12-2 and drives the minimum flow recirculation valve 6 to close to the corresponding opening, and tests the closing characteristic curve of the minimum flow recirculation valve 6;

[0045] The specific operation steps for the function verification of the main feed water pump isolation valve and the main feed water regulating valve are as follows:

[0046] Initial state: feedwater pre-pump 3 operates normally, main feedwater pump 4 operates normally, minimum flow recirculation valve 6 is fully open, main feedwater pump isolation valve 7 and main feedwater regulating valve 8 are fully closed, the liquid level in deaerator 1 is normal, and the feedwater flow is normal;

[0047] The simulation modeling server 14 triggers the water supply signal of the steam generator 9, which is transmitted from the main water supply isolation valve simulation module 14-5 to the main water supply isolation valve drive card 12-5 through the main water supply isolation valve A / D conversion card 13-5 and drives the main water supply pump isolation valve 7 to open, and tests the opening time of the main water supply pump isolation valve 7; the main water supply regulating valve simulation module 14-4 transmits the signal to the main water supply adjustment valve drive card 12-4 through the main water supply regulating valve A / D conversion card 13-4 and drives the main water supply regulating valve 8 to gradually open, and tests the main water supply regulating valve 8 regulation response characteristic curve; at the same time, the minimum flow recirculation valve simulation module 14-2 transmits the signal to the minimum flow recirculation valve drive card 12-2 through the minimum flow recirculation valve A / D conversion card 13-2 and drives the minimum flow recirculation valve 6 to gradually close, and tests the minimum flow recirculation valve 6 regulation response characteristic curve, and the water supply flow measurement device monitors the water supply flow until the steam generator 9 increases from the startup water supply flow to the rated water supply flow;

[0048] During the above test process, the controller parameters in the simulation modeling server 14 are repeatedly adjusted until the water supply pre-pump inlet isolation valve 2, the minimum flow recirculation valve 6, the main water supply pump isolation valve 7, and the main water supply regulating valve 8 meet the design functions, and the water supply pre-pump 3, the main water supply pump 4, and the standby water supply pump 5 meet the design functions.

[0049] Beneficial effects of the present invention:

[0050] The test device and method can realize the logic rehearsal and dynamic test of the secondary water supply system of the nuclear power plant, expose and correct the problems existing in the logic configuration of the emergency shutdown system in advance, and greatly improve the safety and reliability of the secondary water supply system of the nuclear power plant during the operation of the unit. In actual operation, the control ideas of the secondary water supply system of the nuclear power plant can be configured, debugged, tested and optimized, and can communicate with the DCS system in real time, and synchronize the verified and mature control configuration to the DCS system, overcoming the problem that the DCS system does not have the ability to verify its design function by repeatedly modifying the configuration logic. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 It is a structural schematic diagram of the present invention.

[0052] Among them, 1 is the deaerator, 2 is the feed water pre-pump inlet isolation valve, 3 is the feed water pre-pump, 4 is the main feed water pump, 5 is the standby feed water pump, 6 is the minimum flow recirculation valve, 7 is the main feed water pump isolation valve, 8 is the main feed water regulating valve, 9 is the steam generator, 10 is the deaerator level monitoring device, 11 is the feed water flow measurement device, 12 is the DCS cabinet of the secondary circuit water supply system, 12-1 is the deaerator level measurement card, and 12-2 is the minimum flow recirculation valve drive card 12-3 is the main feed water pump drive card, 12-4 is the main feed water regulating valve drive card, 12-5 is the main feed water isolation valve drive card, 12-6 is the standby feed water pump drive card, 12-7 is the feed water front pump drive card, 12-8 is the feed water front pump inlet isolation valve drive card, 12-9 is the feed water flow measurement device drive card; 13 is the PXI data acquisition cabinet, 13-1 is the deaerator liquid level measurement A / D conversion card, 13-2 is the most Small flow recirculation valve A / D conversion card, 13-3 is the main water supply pump A / D conversion card, 13-4 is the main water supply regulating valve A / D conversion card, 13-5 is the main water supply isolation valve A / D conversion card, 13-6 is the standby water supply pump A / D conversion card, 13-7 is the water supply pre-pump A / D conversion card, 13-8 is the water supply pre-pump inlet isolation valve A / D conversion card, 13-9 is the water supply flow measurement device A / D conversion card; 14 is the simulation Modeling server, 14-1 is the deaerator liquid level measurement simulation module, 14-2 is the minimum flow recirculation valve simulation module, 14-3 is the main feed water pump simulation module, 14-4 is the main feed water regulating valve simulation module, 14-5 is the main feed water isolation valve simulation module, 14-6 is the standby feed water pump simulation module, 14-7 is the feed water pre-pump simulation module, 14-8 is the feed water pre-pump inlet isolation valve simulation module, 14-9 is the feed water flow measurement device simulation module. DETAILED DESCRIPTION

[0053] The present invention is further described in detail below in conjunction with embodiments.

[0054] refer to Figure 1 :

[0055] Embodiment 1:

[0056] Taking a 200MW high-temperature gas-cooled reactor unit as an example, two nuclear steam supply systems are connected to a steam turbine to form a nuclear power unit. The thermal power of each nuclear steam supply system is 250MW, the total thermal power is 500MW, and the electrical power is 212MW. The reactor primary loop uses helium as the coolant, with an operating pressure of 7MPa. The reactor secondary loop feed water system pressure is the rated parameter 14.9MPa during the entire operation process, and the steam generator feed water rated flow rate is 345.6t / h.

[0057] The specific working process of the present invention is:

[0058] (1) Start and stop test of water supply pre-pump:

[0059] The deaerator liquid level measurement simulation module 14 - 1 sets the liquid level in the deaerator 1 to be normal (1400-2500 mm), and the output liquid level signal is transmitted to the deaerator liquid level measurement card 12 - 1 through the deaerator liquid level measurement A / D conversion card 13 - 1, and then transmitted to the deaerator liquid level monitoring device 10.

[0060] The simulation modeling server 14 triggers the water supply pre-pump start signal, which is transmitted by the water supply pre-pump simulation module 14-7 to the water supply pre-pump drive card 12-7 through the water supply pre-pump A / D conversion card 13-7 and drives the water supply pre-pump 3 to start, and tests the water supply pre-pump 3 start response characteristic curve; at the same time, the water supply pre-pump inlet isolation valve simulation module 14-8 transmits the signal to the water supply pre-pump inlet isolation valve drive card 12-8 through the water supply pre-pump inlet isolation valve A / D conversion card 13-8 and drives the water supply pre-pump inlet isolation valve 2 to open, and tests the opening time of the water supply pre-pump inlet isolation valve 2;

[0061] The deaerator liquid level measurement simulation module 14-1 sets the liquid level in the deaerator 1 to be low (<1400mm), and the output low liquid level signal is transmitted to the deaerator liquid level measurement card 12-1 through the deaerator liquid level measurement A / D conversion card 13-1, and then transmitted to the deaerator liquid level monitoring device 10. The signal of the deaerator liquid level monitoring device 10 is transmitted to the secondary water supply system DCS cabinet 12, and the water feed pre-pump driving card 12-7 drives the water feed pre-pump 3 to stop, and the stop response characteristic curve of the water feed pre-pump 3 is tested; at the same time, the water feed pre-pump inlet isolation valve driving card 12-8 drives the water feed pre-pump inlet isolation valve 2 to close, and the closing time of the water feed pre-pump inlet isolation valve 2 is tested.

[0062] (2) Start, stop and switch test of main feed water pump and standby feed water pump;

[0063] Initial state: the water supply pre-pump 3 operates normally, the minimum flow recirculation valve 6 is fully open, and the main water supply pump isolation valve 7 is fully closed.

[0064] The simulation modeling server 14 triggers the main feed water pump start signal, which is transmitted from the main feed water pump simulation module 14-3 to the main feed water pump drive card 12-3 through the main feed water pump A / D conversion card 13-3 and drives the main feed water pump 4 to start, and tests the start-up response characteristic curve of the main feed water pump 4; at the same time, the minimum flow recirculation valve simulation module 14-2 transmits the signal to the minimum flow recirculation valve drive card 12-2 through the minimum flow recirculation valve A / D conversion card 13-2 and drives the minimum flow recirculation valve 6 to open, and tests the opening time of the minimum flow recirculation valve 6;

[0065] The simulation modeling server 14 triggers the tripping signal of the main feed water pump, which is transmitted from the main feed water pump simulation module 14-3 to the main feed water pump drive card 12-3 through the main feed water pump A / D conversion card 13-3 and drives the main feed water pump 4 to stop, and tests the stop response characteristic curve of the main feed water pump 4; at the same time, the standby feed water pump drive card 12-6 drives the standby feed water pump 5 to start, and tests the start response characteristic curve of the standby feed water pump 5;

[0066] The simulation modeling server 14 triggers the tripping signal of the water supply pre-pump 3, and the water supply pre-pump driving card 12-7 drives the water supply pre-pump 3 to stop. The stop signal of the water supply pre-pump 3 is transmitted to the water supply pre-pump simulation module 14-7 through the water supply pre-pump A / D conversion card 13-7. The standby water supply pump simulation module 14-6 in the simulation modeling server 14 receives the tripping signal of the water supply pre-pump 3, which is transmitted to the standby water supply pump driving card 12-6 by the standby water supply pump A / D conversion card 13-6 and drives the standby water supply pump 5 to stop, and the stop response characteristic curve of the standby water supply pump 5 is tested.

[0067] (3) Minimum flow recirculation valve function verification:

[0068] Initial state: the water supply pre-pump 3 operates normally, the main water supply pump 4 operates normally, the minimum flow recirculation valve 6 is fully open, and the main water supply pump isolation valve 7 is fully closed.

[0069] The minimum flow recirculation valve simulation module 14-2 is set to have the minimum flow recirculation valve 6 not fully opened (opening degree < 90%), which is transmitted by the minimum flow recirculation valve A / D conversion card 13-2 to the minimum flow recirculation valve drive card 12-2 and drives the minimum flow recirculation valve 6 to close to below 90%; at the same time, when the water supply flow measurement device simulation module 14-9 receives the water supply flow < 90t / h signal, the main water supply pump simulation module 14-3 in the simulation modeling server 14 receives the minimum flow recirculation valve 6 not fully opened and the water supply flow low signal and triggers the main water supply pump tripping signal, which is transmitted by the main water supply pump simulation module 14-3 to the main water supply pump drive card 12-3 through the main water supply pump A / D conversion card 13-3 and drives the main water supply pump 4 to stop;

[0070] The minimum flow recirculation valve simulation module 14-2 is configured to gradually open the minimum flow recirculation valve 6 to 30%, 50% and 100%, which is transmitted from the minimum flow recirculation valve A / D conversion card 13-2 to the minimum flow recirculation valve drive card 12-2 and drives the minimum flow recirculation valve to open to the corresponding opening, and the opening characteristic curve of the minimum flow recirculation valve 6 is tested;

[0071] The minimum flow recirculation valve simulation module 14-2 sets the minimum flow recirculation valve 6 to gradually close to 75%, 50% and 0%, which is transmitted by the minimum flow recirculation valve A / D conversion card 13-2 to the minimum flow recirculation valve drive card 12-2 and drives the minimum flow recirculation valve 6 to close to the corresponding opening, and the closing characteristic curve of the minimum flow recirculation valve 6 is tested.

[0072] (4) Function verification of main feed water pump isolation valve and main feed water regulating valve:

[0073] Initial state: the feed water pre-pump 3 operates normally, the main feed water pump 4 operates normally, the minimum flow recirculation valve 6 is fully open, the main feed water pump isolation valve 7 and the main feed water regulating valve 8 are fully closed, the liquid level in the deaerator 1 is normal (1400-2500mm), and the feed water flow is normal (>90t / h).

[0074] The simulation modeling server 14 triggers the water supply signal of the steam generator 9, which is transmitted by the main water supply isolation valve simulation module 14-5 to the main water supply isolation valve drive card 12-5 through the main water supply isolation valve A / D conversion card 13-5, and drives the main water supply pump isolation valve 7 to open, and tests the opening time of the main water supply pump isolation valve 7; the main water supply regulating valve simulation module 14-4 transmits it to the main water supply adjustment valve drive card 12-4 through the main water supply regulating valve A / D conversion card 13-4, and drives the main water supply regulating valve 8 to gradually open, and tests the adjustment response characteristic curve of the main water supply regulating valve 8; at the same time, the minimum flow recirculation valve simulation module 14-2 transmits it to the minimum flow recirculation valve drive card 12-2 through the minimum flow recirculation valve A / D conversion card 13-2, and drives the minimum flow recirculation valve 6 to gradually close, and tests the adjustment response characteristic curve of the minimum flow recirculation valve 6. The feed water flow rate is monitored by the feed water flow rate measuring device until the steam generator 9 increases from the startup feed water flow rate of 129.6 t / h to the rated feed water flow rate of 345.6 t / h.

[0075] During the above test process, the controller parameters in the simulation modeling server 14 are repeatedly adjusted until the water supply pre-pump inlet isolation valve 2, the minimum flow recirculation valve 6, the main water supply pump isolation valve 7, and the main water supply regulating valve 8 meet the design functions, and the water supply pre-pump 3, the main water supply pump 4, and the standby water supply pump 5 meet the design functions.

Claims

1. A test device for functional verification of a secondary water supply system in a nuclear power plant, characterized in that: include: A deaerator (1) is connected to the inlet of the water feed forward pump inlet isolation valve (2) and is used to remove gas from the water; An isolating valve (2) at the inlet of a water supply pre-pump, the outlet of which is connected to the inlet of the water supply pre-pump (3), and is used to prevent leakage at the inlet of the water supply pre-pump (3); The outlet of the water supply pre-pump (3) is divided into two paths: one path is connected to the inlet of the main water supply pump (4), and the other path is connected to the inlet of the standby water supply pump (5), which is used to increase the pressure entering the main water supply pump (4) and the standby water supply pump (5). The outlets of the main water supply pump (4) and the standby water supply pump (5) are divided into three paths after merging: The first path is connected to the inlet of the minimum flow recirculation valve (6), and the outlet of the minimum flow recirculation valve (6) is connected to the inlet of the deaerator (1); The second path is connected to the inlet of the main feed water pump isolation valve (7), the outlet of the main feed water pump isolation valve (7) is connected to the inlet of the main feed water regulating valve (8), and the outlet of the main feed water regulating valve (8) is connected to the inlet of the steam generator (9); The third path is connected to the inlet of the water flow measurement device (11); The water supply pre-pump inlet isolation valve (2), the water supply pre-pump (3), the main water supply pump (4), the standby water supply pump (5), the minimum flow recirculation valve (6), the main water supply pump isolation valve (7), the main water supply regulating valve (8), the deaerator liquid level monitoring device (10), and the water supply flow measurement device (11) are respectively connected to the simulation modeling server (14) through the secondary circuit water supply system DCS cabinet (12) and the PXI data acquisition cabinet (13); A deaerator liquid level monitoring device (10) is provided inside the deaerator (1), and the deaerator liquid level monitoring device (10) is used to monitor the liquid level in the deaerator (1); The secondary circuit water supply system DCS cabinet (12) comprises a DCS cabinet body and a deaerator liquid level measurement card (12-1) arranged in the DCS cabinet body, a minimum flow recirculation valve drive card (12-2), a main water supply pump drive card (12-3), a main water supply regulating valve drive card (12-4), a main water supply isolation valve drive card (12-5), a standby water supply pump drive card (12-6), a water supply pre-pump drive card (12-7), a water supply pre-pump inlet isolation valve drive card (12-8), and a water supply flow measurement device drive card (12-9); The deaerator liquid level measurement card (12-1) is connected to the deaerator liquid level monitoring device (10), the minimum flow recirculation valve drive card (12-2) is connected to the minimum flow recirculation valve (6), the main feed water pump drive card (12-3) is connected to the main feed water pump (4), the main feed water regulating valve drive card (12-4) is connected to the main feed water regulating valve (8), the main feed water isolation valve drive card (12-5) is connected to the main feed water pump isolation valve (7), the standby feed water pump drive card (12-6) is connected to the standby feed water pump (5), the feed water pre-pump drive card (12-7) is connected to the feed water pre-pump (3), the feed water pre-pump inlet isolation valve drive card (12-8) is connected to the feed water pre-pump inlet isolation valve (2), and the feed water flow measurement device drive card (12-9) is connected to the feed water flow measurement device (11).

2. A test device for functional verification of a secondary water supply system in a nuclear power plant according to claim 1, characterized in that: The PXI data acquisition cabinet (13) comprises a data acquisition cabinet body and a deaerator liquid level measurement A / D conversion card (13-1), a minimum flow recirculation valve A / D conversion card (13-2), a main water supply pump A / D conversion card (13-3), a main water supply regulating valve A / D conversion card (13-4), a main water supply isolation valve A / D conversion card (13-5), a standby water supply pump A / D conversion card (13-6), a water supply pre-pump A / D conversion card (13-7), a water supply pre-pump inlet isolation valve A / D conversion card (13-8) and a water supply flow measurement device A / D conversion card (13-9) arranged in the data acquisition cabinet body; The simulation modeling server (14) comprises a deaerator liquid level measurement simulation module (14-1), a minimum flow recirculation valve simulation module (14-2), a main feed water pump simulation module (14-3), a main feed water regulating valve simulation module (14-4), a main feed water isolation valve simulation module (14-5), a standby feed water pump simulation module (14-6), a feed water pre-pump simulation module (14-7), a feed water pre-pump inlet isolation valve simulation module (14-8) and a feed water flow measurement device simulation module (14-9); The deaerator liquid level measurement simulation module (14-1) is connected to the deaerator liquid level measurement card (12-1) via the deaerator liquid level measurement A / D conversion card (13-1); the minimum flow recirculation valve simulation module (14-2) is connected to the minimum flow recirculation valve drive card (12-2) via the minimum flow recirculation valve A / D conversion card (13-2); the main feed water pump simulation module (14-3) is connected to the main feed water pump drive card (12-3) via the main feed water pump A / D conversion card (13-3); the main feed water regulating valve simulation module (14-4) is connected to the main feed water regulating valve drive card (12-4) via the main feed water regulating valve A / D conversion card (13-4); the main feed water isolation valve simulation module (14-5) is connected to the main feed water isolation valve A / D conversion card (1 3-5) is connected to the main water supply isolation valve drive card (12-5); the standby water supply pump simulation module (14-6) is connected to the standby water supply pump drive card (12-6) via the standby water supply pump A / D conversion card (13-6); the water supply pre-pump simulation module (14-7) is connected to the water supply pre-pump drive card (12-7) via the water supply pre-pump A / D conversion card (13-7); the water supply pre-pump inlet isolation valve simulation module (14-8) is connected to the water supply pre-pump inlet isolation valve drive card (12-8) via the water supply pre-pump inlet isolation valve A / D conversion card (13-8); the water supply flow measurement device simulation module (14-9) is connected to the water supply flow measurement device drive card (12-9) via the water supply flow measurement device A / D conversion card (13-9).

3. A method for using a test device for functional verification of a secondary circuit water supply system of a nuclear power plant according to any one of claims 1 to 2, characterized in that: The steps include: (1) Start and stop test of water supply pre-pump: (2) Start, stop and switch test of main feed water pump and standby feed water pump; (3) Minimum flow recirculation valve function verification: (4) Function verification of main feed water pump isolation valve and main feed water regulating valve: During the above test process, the controller parameters in the simulation modeling server (14) are repeatedly adjusted until the water supply pre-pump inlet isolation valve (2), the minimum flow recirculation valve (6), the main water supply pump isolation valve (7), and the main water supply regulating valve (8) meet the design functions, and the water supply pre-pump (3), the main water supply pump (4), and the standby water supply pump (5) meet the design functions.

4. A method for using a test device for functional verification of a secondary water supply system in a nuclear power plant according to claim 3, characterized in that: The specific operation steps of the water supply pre-pump start and stop test are as follows: The deaerator liquid level measurement simulation module (14-1) sets the liquid level in the deaerator (1) to be normal, and the liquid level signal output by the deaerator liquid level measurement simulation module (14-1) is transmitted to the deaerator liquid level measurement card component (12-1) through the deaerator liquid level measurement A / D conversion card component (13-1), and then transmitted to the deaerator liquid level monitoring device (10); The simulation modeling server (14) triggers a water supply pre-pump start signal, which is transmitted by the water supply pre-pump simulation module (14-7) to the water supply pre-pump drive card (12-7) through the water supply pre-pump A / D conversion card (13-7) and drives the water supply pre-pump (3) to start, and tests the start response characteristic curve of the water supply pre-pump (3); at the same time, the water supply pre-pump inlet isolation valve simulation module (14-8) transmits the signal to the water supply pre-pump inlet isolation valve drive card (12-8) through the water supply pre-pump inlet isolation valve A / D conversion card (13-8) and drives the water supply pre-pump inlet isolation valve (2) to open, and tests the opening time of the water supply pre-pump inlet isolation valve (2); The deaerator liquid level measurement simulation module (14-1) sets the liquid level in the deaerator (1) as a low liquid level, and the output low liquid level signal is transmitted to the deaerator liquid level measurement card (12-1) through the deaerator liquid level measurement A / D conversion card (13-1), and then transmitted to the deaerator liquid level monitoring device (10). The signal of the deaerator liquid level monitoring device (10) is transmitted to the DCS cabinet (12) of the secondary water supply system, and the water supply pre-pump driving card (12-7) drives the water supply pre-pump (3) to stop, and the stop response characteristic curve of the water supply pre-pump (3) is tested; at the same time, the water supply pre-pump inlet isolation valve driving card (12-8) drives the water supply pre-pump inlet isolation valve (2) to close, and the closing time of the water supply pre-pump inlet isolation valve (2) is tested.

5. The method for using the test device for functional verification of the secondary water supply system of a nuclear power plant according to claim 3, characterized in that: The specific operation steps of starting, stopping and switching the main water supply pump and the standby water supply pump are as follows: Initial state: the feedwater pre-pump (3) operates normally, the minimum flow recirculation valve (6) is fully open, and the main feedwater pump isolation valve (7) is fully closed; The simulation modeling server (14) triggers a main water supply pump start signal, which is transmitted from the main water supply pump simulation module (14-3) to the main water supply pump drive card (12-3) through the main water supply pump A / D conversion card (13-3) and drives the main water supply pump (4) to start, and tests the start response characteristic curve of the main water supply pump (4); at the same time, the minimum flow recirculation valve simulation module (14-2) transmits the signal to the minimum flow recirculation valve drive card (12-2) through the minimum flow recirculation valve A / D conversion card (13-2) and drives the minimum flow recirculation valve (6) to open, and tests the opening time of the minimum flow recirculation valve (6); The simulation modeling server (14) triggers a main water supply pump trip signal, which is transmitted by the main water supply pump simulation module (14-3) to the main water supply pump drive card component (12-3) through the main water supply pump A / D conversion card component (13-3) and drives the main water supply pump (4) to stop, and tests the main water supply pump (4) stop response characteristic curve; at the same time, the standby water supply pump drive card component (12-6) drives the standby water supply pump (5) to start, and tests the standby water supply pump (5) start response characteristic curve; The simulation modeling server (14) triggers a tripping signal of the water supply pre-pump (3), and the water supply pre-pump driving card component (12-7) drives the water supply pre-pump (3) to stop. The water supply pre-pump (3) stop signal is transmitted to the water supply pre-pump simulation module (14-7) through the water supply pre-pump A / D conversion card component (13-7). The standby water supply pump simulation module (14-6) in the simulation modeling server (14) receives the tripping signal of the water supply pre-pump (3), and the standby water supply pump A / D conversion card component (13-6) transmits it to the standby water supply pump driving card component (12-6) and drives the standby water supply pump (5) to stop, and the stop response characteristic curve of the standby water supply pump (5) is tested.

6. The method for using the test device for functional verification of the secondary water supply system of a nuclear power plant according to claim 3, characterized in that: The specific operation steps for the minimum flow recirculation valve function verification are as follows: Initial state: the feedwater pre-pump (3) operates normally, the main feedwater pump (4) operates normally, the minimum flow recirculation valve (6) is fully open, and the main feedwater pump isolation valve (7) is fully closed; The minimum flow recirculation valve simulation module (14-2) is set to a minimum flow recirculation valve (6) that is not fully open and has an opening degree of less than 90%, which is transmitted by the minimum flow recirculation valve A / D conversion card (13-2) to the minimum flow recirculation valve drive card (12-2) and drives the minimum flow recirculation valve (6) to close to less than 90%; at the same time, when the water supply flow measurement device simulation module (14-9) receives a low water supply flow signal, the main water supply pump simulation module (14-3) in the simulation modeling server (14) receives the minimum flow recirculation valve (6) that is not fully open and the low water supply flow signal and triggers a main water supply pump trip signal, which is transmitted by the main water supply pump simulation module (14-3) to the main water supply pump drive card (12-3) through the main water supply pump A / D conversion card (13-3) and drives the main water supply pump (4) to stop; The minimum flow recirculation valve simulation module (14-2) is configured to gradually open the minimum flow recirculation valve (6) to 30%, 50% and 100%, and the minimum flow recirculation valve A / D conversion card (13-2) is transmitted to the minimum flow recirculation valve drive card (12-2) and drives the minimum flow recirculation valve to open to the corresponding opening, thereby testing the opening characteristic curve of the minimum flow recirculation valve (6); The minimum flow recirculation valve simulation module (14-2) is configured to gradually close the minimum flow recirculation valve (6) to 75%, 50% and 0%, which is transmitted by the minimum flow recirculation valve A / D conversion card (13-2) to the minimum flow recirculation valve drive card (12-2) and drives the minimum flow recirculation valve (6) to close to the corresponding opening, thereby testing the closing characteristic curve of the minimum flow recirculation valve (6).

7. A method for using a test device for functional verification of a secondary water supply system in a nuclear power plant according to claim 3, characterized in that: The specific operation steps for the function verification of the main feed water pump isolation valve and the main feed water regulating valve are as follows: Initial state: the feedwater pre-pump (3) operates normally, the main feedwater pump (4) operates normally, the minimum flow recirculation valve (6) is fully open, the main feedwater pump isolation valve (7) and the main feedwater regulating valve (8) are fully closed, the liquid level in the deaerator (1) is normal, and the feedwater flow is normal; The simulation modeling server (14) triggers the steam generator (9) to supply water, which is transmitted from the main water supply isolation valve simulation module (14-5) to the main water supply isolation valve drive card (12-5) through the main water supply isolation valve A / D conversion card (13-5) and drives the main water supply pump isolation valve (7) to open, and tests the opening time of the main water supply pump isolation valve (7); and transmitted from the main water supply regulating valve simulation module (14-4) to the main water supply regulating valve drive card (12-4) through the main water supply regulating valve A / D conversion card (13-4) and drives the main water supply pump isolation valve (7) to open. The regulating valve (8) is gradually opened to test the regulating response characteristic curve of the main feedwater regulating valve (8); at the same time, the minimum flow recirculation valve simulation module (14-2) transmits the information to the minimum flow recirculation valve drive card (12-2) through the minimum flow recirculation valve A / D conversion card (13-2) and drives the minimum flow recirculation valve (6) to be gradually closed to test the regulating response characteristic curve of the minimum flow recirculation valve (6), and the feedwater flow measurement device monitors the feedwater flow until the steam generator (9) increases from the startup feedwater flow to the rated feedwater flow.

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