A primary circuit temperature regulation system and method during cold test of high temperature gas-cooled reactor

Abstract

The present invention discloses a primary-loop temperature regulation system and method during a cold test of a high-temperature gas-cooled reactor. A primary-loop cabin pressure monitoring device and a primary-loop cabin temperature monitoring device are arranged inside the primary-loop cabin, a primary-loop pressure monitoring device is arranged inside the pressure vessel, and a primary-loop temperature monitoring device is arranged inside the steam generator; the primary-loop cabin pressure monitoring device, the primary-loop pressure monitoring device, the charging regulating valve, the compressor, the primary-loop temperature monitoring device, the pressure relief regulating valve, the primary-loop cabin temperature monitoring device and the heating fan are respectively connected to a simulation modeling server via a DCS cabinet and a PXI data acquisition cabinet. The system and method can verify the control logic function of the primary-loop temperature regulation system in advance to ensure the reliability of the overpressure protection function of the high-temperature gas-cooled reactor.

Description

Technical Field

[0001] The invention belongs to the technical field of nuclear power, and relates to a primary circuit temperature regulating system and method during a cold test of a high-temperature gas-cooled reactor. Background Art

[0002] The cold test of the high-temperature gas-cooled reactor is a general term for cold functional tests of related process systems at the pressure increase or decrease stage of the primary circuit pressure boundary, with the primary circuit system pre-service pressure test as the main line. The purpose of the primary circuit pre-service pressure test is to further test the strength performance of each device at the primary circuit pressure boundary and verify that there is no abnormal leakage on each sealing surface; at the same time, the deformation and displacement of the primary circuit pressure vessel under pressure are examined, the effectiveness of the support system is preliminarily judged, and the sealing performance of the pressure boundary under normal temperature air atmosphere is tested.

[0003] The primary pressure boundary involved in the cold test of the high-temperature gas-cooled reactor consists of a pressure vessel, a steam generator shell and a hot gas duct shell. The leakage rate of the primary system meets the design requirements by filling and releasing the pressure inside the pressure boundary. The current test method is to use the diaphragm compressor of the helium supply and storage system as a pressure source to pressurize the compressed air and then inject it into the primary system to increase the pressure, and then check for leaks at each pressure platform; the stability of the pressure regulation is verified during the depressurization process. This test method has at least the following disadvantages: (1) The original test process did not consider the influence of ambient temperature on the leakage rate monitoring calculation value, that is, during the filling and releasing of the primary pressure boundary, the temperature of the compressed air in the primary pressure boundary will change with the pressure, and coupled with the change of the ambient temperature of the primary chamber, the leakage rate of the primary circuit cannot be accurately calculated. It is necessary to design a primary temperature control system to ensure that the ambient temperature of the primary pressure boundary is constant; (2) Since the pressure test under high pressure has a high risk, the high-temperature gas-cooled reactor stipulates that the maximum test pressure during the primary cold test shall not exceed 1.1 times the design pressure. It is necessary to verify the control logic function of the primary temperature control system in advance to ensure the reliability of the overpressure protection function of the high-temperature gas-cooled reactor. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a primary-loop temperature regulation system and method during the cold test of a high-temperature gas-cooled reactor. The system and method can verify the control logic function of the primary-loop temperature regulation system in advance to ensure the reliability of the overpressure protection function of the high-temperature gas-cooled reactor.

[0005] To achieve the above-mentioned purpose, the primary circuit temperature regulation system during the cold test of the high-temperature gas-cooled reactor described in the present invention comprises a simulation modeling server, a PXI data acquisition cabinet and a DCS cabinet; the primary circuit temperature regulation system comprises a pressure vessel, a hot gas duct, a steam generator, a primary circuit cabin, a charging regulating valve, a compressor, a gas storage tank, a pressure relief regulating valve and a heating fan;

[0006] The pressure vessel is connected to the steam generator through a hot gas conduit, the pressure vessel, the hot gas conduit and the steam generator are all located in a primary circuit cabin, the outlet of the gas storage tank is connected to the inlet of the compressor, the outlet of the compressor is connected to the inlet of the pressure charging regulating valve, the outlet of the pressure charging regulating valve is connected to the inlet of the steam generator, the outlet of the steam generator is connected to the inlet of the pressure relief regulating valve, the outlet of the pressure relief regulating valve is connected to the inlet of the gas storage tank, the outlet of the heating fan is connected to the inlet of the primary circuit cabin, and the outlet of the primary circuit cabin is connected to the inlet of the heating fan;

[0007] A first-loop cabin pressure monitoring device and a first-loop cabin temperature monitoring device are arranged inside the first-loop cabin, a first-loop pressure monitoring device is arranged inside the pressure vessel, and a first-loop temperature monitoring device is arranged inside the steam generator;

[0008] The primary circuit cabin pressure monitoring device, the primary circuit pressure monitoring device, the charging regulating valve, the compressor, the primary circuit temperature monitoring device, the pressure relief regulating valve, the primary circuit cabin temperature monitoring device and the heating fan are respectively connected to the simulation modeling server through the DCS cabinet and the PXI data acquisition cabinet;

[0009] The DCS cabinet comprises a DCS cabinet body and a primary circuit cabin pressure measuring card, a primary circuit pressure measuring card, a charging pressure regulating valve driving card, a compressor driving card, a primary circuit temperature measuring card, a pressure relief regulating valve driving card, a primary circuit cabin temperature measuring card and a heating fan driving card arranged in the DCS cabinet body;

[0010] Among them, the primary-circuit cabin pressure measurement card is connected to the primary-circuit cabin pressure monitoring device, the primary-circuit pressure measurement card is connected to the primary-circuit pressure monitoring device, the charging pressure regulating valve drive card is connected to the charging pressure regulating valve, the compressor drive card is connected to the compressor, the primary-circuit temperature measurement card is connected to the primary-circuit temperature monitoring device, the pressure relief regulating valve drive card is connected to the pressure relief regulating valve, the primary-circuit cabin temperature measurement card is connected to the primary-circuit cabin temperature monitoring device, and the heating fan drive card is connected to the heating fan.

[0011] The PXI data acquisition cabinet includes a data acquisition cabinet body and a primary circuit cabin pressure monitoring A / D conversion card, a primary circuit pressure monitoring A / D conversion card, a charging pressure regulating valve A / D conversion card, a compressor drive A / D conversion card, a primary circuit temperature monitoring A / D conversion card, a pressure relief regulating valve A / D conversion card, a primary circuit cabin temperature monitoring A / D conversion card and a heating fan drive A / D conversion card arranged in the data acquisition cabinet body;

[0012] The simulation modeling server includes a primary circuit cabin pressure measurement simulation module, a primary circuit pressure measurement simulation module, a charging pressure regulating valve simulation module, a compressor simulation module, a primary circuit temperature measurement simulation module, a pressure relief regulating valve simulation module, a primary circuit cabin temperature measurement simulation module and a heating fan simulation module;

[0013] Among them, the first-circuit cabin pressure measurement simulation module is connected to the first-circuit cabin pressure measurement card via the first-circuit cabin pressure monitoring A / D conversion card; the first-circuit pressure measurement simulation module is connected to the first-circuit pressure measurement card via the first-circuit pressure monitoring A / D conversion card; the charging pressure regulating valve simulation module is connected to the charging pressure regulating valve drive card via the charging pressure regulating valve A / D conversion card; the compressor simulation module is connected to the compressor drive card via the compressor drive A / D conversion card; the first-circuit temperature measurement simulation module is connected to the first-circuit temperature measurement card via the first-circuit temperature monitoring A / D conversion card; the pressure relief regulating valve simulation module is connected to the pressure relief regulating valve drive card via the pressure relief regulating valve A / D conversion card; the first-circuit cabin temperature measurement simulation module is connected to the first-circuit cabin temperature measurement card via the first-circuit cabin temperature monitoring A / D conversion card; the heating fan simulation module is connected to the heating fan drive card via the heating fan drive A / D conversion card.

[0014] The primary circuit temperature regulation method during the cold test of a high temperature gas-cooled reactor described in the present invention includes primary circuit pressure charging function verification, primary circuit pressure maintaining function verification and primary circuit overpressure protection function verification.

[0015] The specific process of verifying the primary circuit charging function is as follows:

[0016] A first-loop target pressure is set in a first-loop pressure measurement simulation module. A first-loop pressure signal detected by a first-loop pressure monitoring device is sent to the first-loop pressure measurement simulation module via a first-loop pressure measurement card and a first-loop pressure monitoring A / D conversion card. The first-loop pressure measurement simulation module inputs the received first-loop pressure signal to the compressor simulation module and the charging pressure regulating valve simulation module. The compressor simulation module generates a first control signal according to the first-loop pressure signal and the preset first-loop target pressure. The first control signal is then used to control the compressor via the compressor drive A / D conversion card and the compressor drive card. The action signal fed back by the compressor is input into the compressor simulation module via the compressor drive card and the compressor drive A / D conversion card to test the startup response characteristics of the compressor.

[0017] At the same time, the charging pressure regulating valve simulation module generates a second control signal according to the primary circuit pressure signal and the preset primary circuit target pressure, and then sends the second control signal to the charging pressure regulating valve drive card via the charging pressure regulating valve A / D conversion card to control the opening of the charging pressure regulating valve, so that the charging pressure regulating valve is automatically put into operation and adjusts the charging rate. The pressure increase rate does not exceed 0.01MPa / min, and the primary circuit starts to be pressurized. Then the action signal fed back by the charging pressure regulating valve is input into the charging pressure regulating valve simulation module via the charging pressure regulating valve drive card and the charging pressure regulating valve A / D conversion card in turn to test the opening and dynamic response characteristics of the charging pressure regulating valve.

[0018] The specific process of verifying the primary circuit pressure maintenance function is as follows:

[0019] The primary circuit temperature monitoring device monitors the primary circuit temperature signal in real time, and then inputs the primary circuit temperature signal into the primary circuit temperature measurement simulation module through the primary circuit temperature measurement card and the primary circuit temperature monitoring A / D conversion card in sequence. The primary circuit temperature measurement simulation module calculates the temperature and pressure target values ​​of the primary circuit chamber according to the primary circuit pressure and temperature monitored in real time;

[0020] The primary-loop cabin temperature monitoring device detects the temperature signal of the primary-loop cabin in real time, and transmits the temperature signal of the primary-loop cabin to the primary-loop cabin temperature measurement simulation module in sequence via the primary-loop cabin temperature measurement card and the primary-loop cabin temperature monitoring A / D conversion card; the primary-loop cabin temperature measurement simulation module sends the temperature signal of the primary-loop cabin to the heating fan simulation module, the primary-loop cabin pressure monitoring device detects the pressure signal of the primary-loop cabin in real time, and then transmits it to the primary-loop cabin pressure measurement simulation module via the primary-loop cabin pressure measurement card and the primary-loop cabin pressure monitoring A / D conversion card, and the primary-loop cabin pressure measurement simulation module sends the pressure signal of the primary-loop cabin to the heating fan simulation module;

[0021] The heating fan simulation module generates a third control signal according to the pressure signal of the first-circuit cabin, the temperature signal of the first-circuit cabin, and the calculated temperature and pressure target values ​​of the first-circuit cabin, and sends the third control signal to the heating fan drive card via the heating fan drive A / D conversion card to control the speed of the heating fan, wherein the action signal fed back by the heating fan is sequentially input into the heating fan simulation module via the heating fan drive card and the heating fan drive A / D conversion card to test the start-up response and speed regulation characteristics of the heating fan.

[0022] The specific process of primary circuit overpressure protection function verification is as follows:

[0023] During the primary circuit charging process, when the primary circuit pressure is higher than 10% of the design pressure, the primary circuit pressure signal measured by the primary circuit pressure monitoring device is transmitted to the primary circuit pressure measurement simulation module via the primary circuit pressure measurement card and the primary circuit pressure monitoring A / D conversion card in sequence; the compressor simulation module sends a compressor stop signal, which is then transmitted to the compressor drive card via the compressor drive A / D conversion card to drive the compressor to stop; at the same time, the charging pressure regulating valve simulation module sends a charging pressure regulating valve closing signal, which is then transmitted to the charging pressure regulating valve drive card via the charging pressure regulating valve A / D conversion card to drive the charging pressure regulating valve to close; the pressure relief regulating valve simulation module sends a pressure relief regulating valve full-open signal, which is then transmitted to the pressure relief regulating valve drive card via the pressure relief regulating valve A / D conversion card to drive the pressure relief regulating valve to open quickly;

[0024] The action signal fed back by the compressor is sequentially input into the compressor simulation module through the compressor drive card and the compressor drive A / D conversion card to test the stop response characteristics of the compressor; the action signal fed back by the charging pressure regulating valve is sequentially input into the charging pressure regulating valve simulation module through the charging pressure regulating valve drive card and the charging pressure regulating valve A / D conversion card to test the closing time of the charging pressure regulating valve; the action signal fed back by the pressure relief regulating valve is sequentially input into the pressure relief regulating valve simulation module through the pressure relief regulating valve drive card and the pressure relief regulating valve A / D conversion card to test the opening time of the pressure relief regulating valve;

[0025] When the pressure of a circuit is released to 5% of the design pressure, the pressure relief regulating valve simulation module outputs the automatic adjustment signal of the pressure relief regulating valve, which is then transmitted to the pressure relief regulating valve drive card through the pressure relief regulating valve A / D conversion card to drive the pressure relief regulating valve to gradually close and automatically adjust the pressure of a circuit to the design pressure and maintain pressure stability; the action signal fed back by the pressure relief regulating valve is input into the pressure relief regulating valve simulation module through the pressure relief regulating valve drive card and the pressure relief regulating valve A / D conversion card in turn to test the closing time and dynamic response characteristics of the pressure relief regulating valve.

[0026] The present invention has the following beneficial effects:

[0027] The primary circuit temperature regulation system and method during the cold test of a high-temperature gas-cooled reactor described in the present invention calculates the target temperature and pressure values ​​of the primary circuit cabin according to the real-time monitored primary circuit pressure and temperature during specific operation, dynamically adjusts the primary circuit temperature by adjusting the rotation speed of the heating fan, realizes dynamic and accurate adjustment of the primary circuit cabin ambient temperature, and improves the accuracy of the calculation of the primary circuit leakage rate; during specific operation, the simulation modeling server controls and collects signals with the primary circuit cabin pressure monitoring device, the primary circuit cabin temperature monitoring device, the charging regulating valve, the pressure relief regulating valve, the compressor and the heating fan through the PXI data acquisition cabinet and the DCS cabinet, thereby realizing the early verification of the primary circuit charging, pressure maintaining and overpressure protection functions during the cold test of the high-temperature gas-cooled reactor, exposing and correcting the problems existing in the system logic configuration and the valve dynamic characteristics in advance, and greatly improving the reliability of safe operation during the cold test of the high-temperature gas-cooled reactor. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the present invention.

[0029] Among them, 1 is a pressure vessel, 2 is a hot gas duct, 3 is a steam generator, 4 is a primary circuit cabin, 5 is a charging pressure regulating valve, 6 is a compressor, 7 is a gas storage tank, 8 is a pressure relief regulating valve, 9 is a heating fan, 10 is a primary circuit cabin pressure monitoring device, 11 is a primary circuit pressure monitoring device, 12 is a primary circuit temperature monitoring device, 13 is a primary circuit cabin temperature monitoring device, 14 is a DCS cabinet, 14-1 is a primary circuit cabin pressure measurement card, 14-2 is a primary circuit pressure measurement card, 14-3 is a charging pressure regulating valve drive card, 14-4 is a compressor drive card, 14-5 is a primary circuit temperature measurement card, 14-6 is a pressure relief regulating valve drive card, 14-7 is a primary circuit cabin temperature measurement card, 14-8 is a heating fan drive card, 15 is a PXI data acquisition cabinet, 15-1 is a primary circuit cabin pressure monitoring card, 15-2 is a primary circuit pressure measurement card, 15-3 is a charging pressure regulating valve drive card, 15-4 is a compressor drive card, 15-5 is a primary circuit temperature measurement card, 15-6 is a pressure relief regulating valve drive card, 15-7 is a primary circuit cabin temperature measurement card, 15-8 is a heating fan drive card, 15-1 is a primary circuit cabin pressure monitoring card, 15-2 is a primary circuit cabin ...2 is a primary circuit cabin pressure measurement card, 15-2 is a primary circuit cabin pressure measurement card, / D conversion card, 15-2 is a circuit pressure monitoring A / D conversion card, 15-3 is a charging pressure regulating valve A / D conversion card, 15-4 is a compressor drive A / D conversion card, 15-5 is a circuit temperature monitoring A / D conversion card, 15-6 is a pressure relief regulating valve A / D conversion card, 15-7 is a circuit cabin temperature monitoring A / D conversion card, 15-8 is a heating fan drive A / D conversion card, 16 is a simulation modeling server, 16-1 is a circuit cabin pressure measurement simulation module, 16-2 is a circuit pressure measurement simulation module, 16-3 is a charging pressure regulating valve simulation module, 16-4 is a compressor simulation module, 16-5 is a circuit temperature measurement simulation module, 16-6 is a pressure relief regulating valve simulation module, 16-7 is a circuit cabin temperature measurement simulation module, 16-8 is a heating fan simulation module. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only an embodiment of a part of the present invention, not all embodiments, and is not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concepts disclosed in the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the present invention.

[0031] The accompanying drawings show schematic diagrams of structures according to embodiments disclosed in the present invention. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0032] refer to Figure 1 The primary circuit temperature control system during the cold test of the high temperature gas-cooled reactor of the present invention comprises a simulation modeling server 16, a PXI data acquisition cabinet 15 and a DCS cabinet 14; the primary circuit temperature control system comprises a pressure vessel 1, a hot gas duct 2, a steam generator 3, a primary circuit compartment 4, a charging pressure regulating valve 5, a compressor 6, a gas storage tank 7, a pressure relief regulating valve 8 and a heating fan 9;

[0033] The pressure vessel 1 is connected to the steam generator 3 through the hot air conduit 2. The pressure vessel 1, the hot air conduit 2 and the steam generator 3 are all located in the primary circuit cabin 4. The outlet of the gas storage tank 7 is connected to the inlet of the compressor 6. The outlet of the compressor 6 is connected to the inlet of the charging regulating valve 5. The outlet of the charging regulating valve 5 is connected to the inlet of the steam generator 3. The outlet of the steam generator 3 is connected to the inlet of the pressure relief regulating valve 8. The outlet of the pressure relief regulating valve 8 is connected to the inlet of the gas storage tank 7. The outlet of the heating fan 9 is connected to the inlet of the primary circuit cabin 4. The outlet of the primary circuit cabin 4 is connected to the inlet of the heating fan 9.

[0034] A first-loop compartment pressure monitoring device 10 and a first-loop compartment temperature monitoring device 13 are provided inside the first-loop compartment 4 , a first-loop pressure monitoring device 11 is provided inside the pressure vessel 1 , and a first-loop temperature monitoring device 12 is provided inside the steam generator 3 .

[0035] The first-loop cabin pressure monitoring device 10, the first-loop pressure monitoring device 11, the charging regulating valve 5, the compressor 6, the first-loop temperature monitoring device 12, the pressure relief regulating valve 8, the first-loop cabin temperature monitoring device 13 and the heating fan 9 are respectively connected to the simulation modeling server 16 through the DCS cabinet 14 and the PXI data acquisition cabinet 15.

[0036] The DCS cabinet 14 includes a DCS cabinet body and a primary circuit cabin pressure measuring card 14-1, a primary circuit pressure measuring card 14-2, a charging pressure regulating valve driving card 14-3, a compressor driving card 14-4, a primary circuit temperature measuring card 14-5, a pressure relief regulating valve driving card 14-6, a primary circuit cabin temperature measuring card 14-7 and a heating fan driving card 14-8 arranged in the DCS cabinet body;

[0037] Among them, the first-circuit cabin pressure measuring card 14-1 is connected to the first-circuit cabin pressure monitoring device 10, the first-circuit pressure measuring card 14-2 is connected to the first-circuit pressure monitoring device 11, the charging pressure regulating valve driving card 14-3 is connected to the charging pressure regulating valve 5, the compressor driving card 14-4 is connected to the compressor 6, the first-circuit temperature measuring card 14-5 is connected to the first-circuit temperature monitoring device 12, the pressure relief regulating valve driving card 14-6 is connected to the pressure relief regulating valve 8, the first-circuit cabin temperature measuring card 14-7 is connected to the first-circuit cabin temperature monitoring device 13, and the heating fan driving card 14-8 is connected to the heating fan 9.

[0038] The PXI data acquisition cabinet 15 includes a data acquisition cabinet body and a primary circuit cabin pressure monitoring A / D conversion card 15-1, a primary circuit pressure monitoring A / D conversion card 15-2, a charging pressure regulating valve A / D conversion card 15-3, a compressor drive A / D conversion card 15-4, a primary circuit temperature monitoring A / D conversion card 15-5, a pressure relief regulating valve A / D conversion card 15-6, a primary circuit cabin temperature monitoring A / D conversion card 15-7 and a heating fan drive A / D conversion card 15-8 arranged in the data acquisition cabinet body;

[0039] The simulation modeling server 16 includes a primary circuit cabin pressure measurement simulation module 16-1, a primary circuit pressure measurement simulation module 16-2, a charging pressure regulating valve simulation module 16-3, a compressor simulation module 16-4, a primary circuit temperature measurement simulation module 16-5, a pressure relief regulating valve simulation module 16-6, a primary circuit cabin temperature measurement simulation module 16-7 and a heating fan simulation module 16-8;

[0040] Among them, the primary-circuit cabin pressure measurement simulation module 16-1 is connected to the primary-circuit cabin pressure measurement card 14-1 via the primary-circuit cabin pressure monitoring A / D conversion card 15-1; the primary-circuit pressure measurement simulation module 16-2 is connected to the primary-circuit pressure measurement card 14-2 via the primary-circuit pressure monitoring A / D conversion card 15-2; the charging pressure regulating valve simulation module 16-3 is connected to the charging pressure regulating valve drive card 14-3 via the charging pressure regulating valve A / D conversion card 15-3; the compressor simulation module 16-4 is connected to the compressor drive card 14-4 via the compressor drive A / D conversion card 15-4; The primary circuit temperature measurement simulation module 16-5 is connected to the primary circuit temperature measurement card 14-5 via the primary circuit temperature monitoring A / D conversion card 15-5; the pressure relief regulating valve simulation module 16-6 is connected to the pressure relief regulating valve drive card 14-6 via the pressure relief regulating valve A / D conversion card 15-6; the primary circuit cabin temperature measurement simulation module 16-7 is connected to the primary circuit cabin temperature measurement card 14-7 via the primary circuit cabin temperature monitoring A / D conversion card 15-7; the heating fan simulation module 16-8 is connected to the heating fan drive card 14-8 via the heating fan drive A / D conversion card 15-8.

[0041] The primary circuit temperature adjustment method during the cold test of a high temperature gas-cooled reactor of the present invention comprises the following steps:

[0042] 1) Verification of primary circuit charging function

[0043] A first-loop target pressure is set in the first-loop pressure measurement simulation module 16-2. The first-loop pressure signal detected by the first-loop pressure monitoring device 11 is sent to the first-loop pressure measurement simulation module 16-2 via the first-loop pressure measurement card 14-2 and the first-loop pressure monitoring A / D conversion card 15-2. The first-loop pressure measurement simulation module 16-2 inputs the received first-loop pressure signal to the compressor simulation module 16-4 and the charging pressure regulating valve simulation module 16-3. The compressor simulation module 16-4 generates a first control signal according to the first-loop pressure signal and the preset first-loop target pressure. Then, the first control signal is used to control the compressor 6 via the compressor drive A / D conversion card 15-4 and the compressor drive card 14-4. The action signal fed back by the compressor 6 is input into the compressor simulation module 16-4 via the compressor drive card 14-4 and the compressor drive A / D conversion card 15-4 to test the startup response characteristics of the compressor 6.

[0044] At the same time, the charging pressure regulating valve simulation module 16-3 generates a second control signal according to the first-circuit pressure signal and the preset first-circuit target pressure, and then sends the second control signal to the charging pressure regulating valve drive card 14-3 via the charging pressure regulating valve A / D conversion card 15-3 to control the opening of the charging pressure regulating valve 5, so that the charging pressure regulating valve 5 is automatically put into operation and adjusts the charging rate. The pressure increase rate does not exceed 0.01MPa / min, and the first circuit starts to be pressurized. Then, the action signal fed back by the charging pressure regulating valve 5 is input into the charging pressure regulating valve simulation module 16-3 via the charging pressure regulating valve drive card 14-3 and the charging pressure regulating valve A / D conversion card 15-3 in turn to test the opening and dynamic response characteristics of the charging pressure regulating valve 5.

[0045] 2) Verification of the primary circuit pressure maintenance function

[0046] The primary circuit temperature monitoring device 12 monitors the primary circuit temperature signal in real time, and then inputs the primary circuit temperature signal into the primary circuit temperature measurement simulation module 16-5 through the primary circuit temperature measurement card 14-5 and the primary circuit temperature monitoring A / D conversion card 15-5 in sequence. The primary circuit temperature measurement simulation module 16-5 calculates the temperature and pressure target values ​​of the primary circuit chamber 4 according to the primary circuit pressure and temperature monitored in real time;

[0047] The primary-loop cabin temperature monitoring device 13 detects the temperature signal of the primary-loop cabin 4 in real time, and transmits the temperature signal of the primary-loop cabin 4 to the primary-loop cabin temperature measurement simulation module 16-7 via the primary-loop cabin temperature measurement card 14-7 and the primary-loop cabin temperature monitoring A / D conversion card 15-7 in sequence; the primary-loop cabin temperature measurement simulation module 16-7 sends the temperature signal of the primary-loop cabin 4 to the heating fan simulation module 16-8, the primary-loop cabin pressure monitoring device 10 detects the pressure signal of the primary-loop cabin 4 in real time, and then transmits it to the primary-loop cabin pressure measurement simulation module 16-1 via the primary-loop cabin pressure measurement card 14-1 and the primary-loop cabin pressure monitoring A / D conversion card 15-1, and the primary-loop cabin pressure measurement simulation module 16-1 sends the pressure signal of the primary-loop cabin 4 to the heating fan simulation module 16-8;

[0048] The heating fan simulation module 16-8 generates a third control signal according to the pressure signal of the first-circuit cabin 4, the temperature signal of the first-circuit cabin 4, and the calculated temperature and pressure target values ​​of the first-circuit cabin 4, and sends the third control signal to the heating fan drive card 14-8 via the heating fan drive A / D conversion card 15-8 to control the speed of the heating fan 9, wherein the action signal fed back by the heating fan 9 is sequentially input into the heating fan simulation module 16-8 via the heating fan drive card 14-8 and the heating fan drive A / D conversion card 15-8 to test the start-up response and speed regulation characteristics of the heating fan 9.

[0049] 3) Verification of primary circuit overpressure protection function

[0050] During the process of charging a circuit, when the pressure of the circuit is higher than 10% of the design pressure, the pressure signal of the circuit measured by the circuit pressure monitoring device 11 is transmitted to the circuit pressure measurement simulation module 16-2 through the circuit pressure measurement card 14-2 and the circuit pressure monitoring A / D conversion card 15-2; the compressor simulation module 16-4 sends a stop signal of the compressor 6, which is then transmitted to the compressor drive card 14-4 through the compressor drive A / D conversion card 15-4 to drive the compressor 6 to stop; at the same time, the charging pressure regulating valve simulation module 16-3 sends a closing signal of the charging pressure regulating valve 5, which is then transmitted to the charging pressure regulating valve drive card 14-3 through the charging pressure regulating valve A / D conversion card 15-3 to drive the charging pressure regulating valve 5 to close; the pressure relief regulating valve simulation module 16-6 sends a full-open signal of the pressure relief regulating valve 8, which is then transmitted to the pressure relief regulating valve drive card 14-6 through the pressure relief regulating valve A / D conversion card 15-6 to drive the pressure relief regulating valve 8 to open quickly;

[0051] The action signal fed back by the compressor 6 is sequentially input into the compressor simulation module 16-4 via the compressor drive card 14-4 and the compressor drive A / D conversion card 15-4 to test the stop response characteristics of the compressor 6; the action signal fed back by the charging pressure regulating valve 5 is sequentially input into the charging pressure regulating valve simulation module 16-3 via the charging pressure regulating valve drive card 14-3 and the charging pressure regulating valve A / D conversion card 15-3 to test the closing time of the charging pressure regulating valve 5; the action signal fed back by the pressure relief regulating valve 8 is sequentially input into the pressure relief regulating valve simulation module 16-6 via the pressure relief regulating valve drive card 14-6 and the pressure relief regulating valve A / D conversion card 15-6 to test the opening time of the pressure relief regulating valve 8.

[0052] When the pressure in a circuit is released to 5% of the design pressure, the pressure relief regulating valve simulation module 16-6 outputs the automatic adjustment signal of the pressure relief regulating valve 8, which is then transmitted to the pressure relief regulating valve drive card 14-6 via the pressure relief regulating valve A / D conversion card 15-6 to drive the pressure relief regulating valve 8 to gradually close and automatically adjust the pressure in a circuit to the design pressure and maintain pressure stability; the action signal fed back by the pressure relief regulating valve 8 is input into the pressure relief regulating valve simulation module 16-6 via the pressure relief regulating valve drive card 14-6 and the pressure relief regulating valve A / D conversion card 15-6 in turn to test the closing time and dynamic response characteristics of the pressure relief regulating valve 8.

[0053] Embodiment 1

[0054] Taking the 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 electric power is 211MW. The reactor primary loop uses helium as the coolant, with an operating pressure of 7MPa and a design pressure of 8.1MPa. According to the equipment structure of the primary loop of the high-temperature gas-cooled reactor, 6 pressure test platforms of 4%, 10%, 20%, 50%, 70%, and 100% of the primary loop design pressure were set up during the primary loop cold test.

[0055] 1) Verification of primary circuit charging function

[0056] In the first-loop pressure measurement simulation module 16-2, the first-loop target pressure is set to 0.0324MPa. The first-loop pressure signal detected by the first-loop pressure monitoring device 11 is sent to the first-loop pressure measurement simulation module 16-2 via the first-loop pressure measurement card 14-2 and the first-loop pressure monitoring A / D conversion card 15-2. The first-loop pressure measurement simulation module 16-2 inputs the received first-loop pressure signal to the compressor simulation module 16-4 and the charging pressure regulating valve simulation module 16-3. The compressor simulation module 16-4 generates a first control signal according to the first-loop pressure signal and the preset first-loop target pressure, and then sends the first control signal to the compressor drive card 14-4 via the compressor drive A / D conversion card 15-4 to control the compressor 6, wherein the action signal fed back by the compressor 6 is sent to the compressor drive card 14-4 and the compressor The compressor drive A / D conversion card 15-4 is input into the compressor simulation module 16-4 to test the starting response characteristics of the compressor 6; at the same time, the charging pressure regulating valve simulation module 16-3 generates a second control signal according to the first-circuit pressure signal and the preset first-circuit target pressure, and then sends the second control signal to the charging pressure regulating valve 5 through the charging pressure regulating valve A / D conversion card 15-3 and the charging pressure regulating valve drive card 14-3 to control the opening of the charging pressure regulating valve 5, so that the charging pressure regulating valve 5 is automatically put into operation and adjusts the charging rate, and the pressure increase rate does not exceed 0.01MPa / min, and the first circuit starts to be pressurized, and then the action signal fed back by the charging pressure regulating valve 5 is successively input into the charging pressure regulating valve simulation module 16-3 through the charging pressure regulating valve drive card 14-3 and the charging pressure regulating valve A / D conversion card 15-3 to test the opening and dynamic response characteristics of the charging pressure regulating valve 5.

[0057] 2) Verification of the primary circuit pressure maintenance function

[0058] When the primary circuit pressure reaches 0.324MPa, the primary circuit temperature monitoring device 12 monitors the temperature signal of the primary circuit in real time, and then inputs the temperature signal of the primary circuit into the primary circuit temperature measurement simulation module 16-5 through the primary circuit temperature measurement card 14-5 and the primary circuit temperature monitoring A / D conversion card 15-5 in sequence. The simulation modeling server 16 calculates the temperature and pressure target values ​​of the primary circuit chamber 4 according to the real-time monitored primary circuit pressure and temperature, and ensures that the primary circuit temperature is not lower than 20°C during the pressurization process;

[0059] The primary-loop cabin temperature monitoring device 13 detects the temperature signal of the primary-loop cabin 4 in real time, and transmits the temperature signal of the primary-loop cabin 4 to the primary-loop cabin temperature measurement simulation module 16-7 via the primary-loop cabin temperature measurement card 14-7 and the primary-loop cabin temperature monitoring A / D conversion card 15-7 in sequence; the primary-loop cabin temperature measurement simulation module 16-7 sends the temperature signal of the primary-loop cabin 4 to the heating fan simulation module 16-8, the primary-loop cabin pressure monitoring device 10 detects the pressure signal of the primary-loop cabin 4 in real time, and then transmits it to the primary-loop cabin pressure measurement simulation module 16-1 via the primary-loop cabin pressure measurement card 14-1 and the primary-loop cabin pressure monitoring A / D conversion card 15-1, and the primary-loop cabin pressure measurement simulation module 16-1 sends the pressure signal of the primary-loop cabin 4 to the heating fan simulation module 16-8;

[0060] The heating fan simulation module 16-8 generates a third control signal according to the pressure signal of the first-circuit cabin 4, the temperature signal of the first-circuit cabin 4, and the calculated temperature and pressure target values ​​of the first-circuit cabin 4, and sends the third control signal to the heating fan 9 via the heating fan drive A / D conversion card 15-8 and the heating fan drive card 14-8 to control the speed of the heating fan 9, wherein the action signal fed back by the heating fan 9 is sequentially input into the heating fan simulation module 16-8 via the heating fan drive card 14-8 and the heating fan drive A / D conversion card 15-8 to test the start-up response and speed regulation characteristics of the heating fan 9.

[0061] During the pressure maintenance period, the values ​​of each displacement measurement point are recorded, and a judgment is made on the deformation condition of the pressure vessel 1 and the effectiveness of its supporting system. The pressure can be increased only after confirming that there is no leakage in the primary circuit and that there are no abnormalities in the pressure boundary components and their supporting systems. In the primary circuit pressure measurement simulation module 16-2, the primary circuit target pressures are set to 0.81MPa, 1.62MPa, 4.05MPa and 5.67MPa respectively. According to the above steps, the primary circuit pressure is increased to the target pressure and then the pressure is maintained. The above pressure platform test qualification standards are: there is no obvious change in the deformation and displacement of the pressure vessel 1 under pressure, and there is no obvious leakage on the sealing surfaces of the primary circuit.

[0062] In the primary circuit pressure measurement simulation module 16-2, the primary circuit target pressure is set to 8.1 MPa. According to the above steps, the primary circuit pressure is raised to the design pressure and then maintained. After maintaining the pressure for 24 hours, the leakage rate calculation is started. The calculation formula is:

[0063] Fit the test curve according to the following formula and get t i Gas mass fitting value at time (Unit: g):

[0064]

[0065]

[0066]

[0067] Where n is the total number of valid data points, i is the serial number of the valid data point, and Σ indicates that all valid data points are summed.

[0068] The fitting value L of the leakage rate is calculated according to the following formula: am (Unit: %):

[0069]

[0070] The standard deviation is calculated as follows:

[0071]

[0072]

[0073] S A =K[n] 1 / 2

[0074] Then the upper limit value UCL (in %) of the leakage rate at 95% confidence level is:

[0075] D F =n-2

[0076]

[0077] UCL=L am +2400·t 0.95 (S A / B)

[0078] Among them, UCL is the final determined leakage rate value. The qualified standard of leakage rate is: not more than UCL < 0.1% / day.

[0079] 3) Verification of primary circuit overpressure protection function

[0080] During the pressurization process of a circuit, when the pressure of a circuit reaches 8.91 MPa, the pressure signal of the circuit measured by the circuit pressure monitoring device 11 is transmitted to the circuit pressure measurement simulation module 16-2 via the circuit pressure measurement card 14-2 and the circuit pressure monitoring A / D conversion card 15-2; the compressor simulation module 16-4 sends a stop signal of the compressor 6, which is then transmitted to the compressor drive card 14-4 via the compressor drive A / D conversion card 15-4 to drive the compressor 6 to stop; at the same time, the charging pressure regulating valve simulation module 16-3 sends a closing signal of the charging pressure regulating valve 5, which is then transmitted to the charging pressure regulating valve drive card 14-3 via the charging pressure regulating valve A / D conversion card 15-3 to drive the charging pressure regulating valve 5 to close; the pressure relief regulating valve simulation module 16-6 sends a full-open signal of the pressure relief regulating valve 8, which is then transmitted to the pressure relief regulating valve drive card 14-6 via the pressure relief regulating valve A / D conversion card 15-6 to drive the pressure relief regulating valve 8 to open;

[0081] The action signal fed back by the compressor 6 is sequentially input into the compressor simulation module 16-4 via the compressor drive card 14-4 and the compressor drive A / D conversion card 15-4 to test the stop response characteristics of the compressor 6; the action signal fed back by the charging pressure regulating valve 5 is sequentially input into the charging pressure regulating valve simulation module 16-3 via the charging pressure regulating valve drive card 14-3 and the charging pressure regulating valve A / D conversion card 15-3 to test the closing time of the charging pressure regulating valve 5; the action signal fed back by the pressure relief regulating valve 8 is sequentially input into the pressure relief regulating valve simulation module 16-6 via the pressure relief regulating valve drive card 14-6 and the pressure relief regulating valve A / D conversion card 15-6 to test the opening time of the pressure relief regulating valve 8;

[0082] When the pressure in one circuit is released to 8.505MPa, the pressure relief regulating valve simulation module 16-6 generates an automatic adjustment signal for the pressure relief regulating valve 8, which is then transmitted to the pressure relief regulating valve drive card 14-6 via the pressure relief regulating valve A / D conversion card 15-6 to drive the pressure relief regulating valve 8 to gradually close and automatically adjust the pressure in one circuit to 8.1MPa and maintain pressure stability; the action signal fed back by the pressure relief regulating valve 8 is input into the pressure relief regulating valve simulation module 16-6 via the pressure relief regulating valve drive card 14-6 and the pressure relief regulating valve A / D conversion card 15-6 in turn to test the closing time and dynamic response characteristics of the pressure relief regulating valve 8.

Claims

1. A primary circuit temperature control system for a high temperature gas-cooled reactor during cold test, characterized in that: It comprises a simulation modeling server (16), a PXI data acquisition cabinet (15) and a DCS cabinet (14); the primary circuit temperature control system comprises a pressure vessel (1), a hot air duct (2), a steam generator (3), a primary circuit chamber (4), a charging pressure regulating valve (5), a compressor (6), a gas storage tank (7), a pressure relief regulating valve (8) and a heating fan (9); The pressure vessel (1) is connected to the steam generator (3) via a hot air conduit (2); the pressure vessel (1), the hot air conduit (2) and the steam generator (3) are all located in a primary circuit chamber (4); the outlet of the gas storage tank (7) is connected to the inlet of the compressor (6); the outlet of the compressor (6) is connected to the inlet of the charging regulating valve (5); the outlet of the charging regulating valve (5) is connected to the inlet of the steam generator (3); the outlet of the steam generator (3) is connected to the inlet of the pressure relief regulating valve (8); the outlet of the pressure relief regulating valve (8) is connected to the inlet of the gas storage tank (7); the outlet of the heating fan (9) is connected to the inlet of the primary circuit chamber (4); and the outlet of the primary circuit chamber (4) is connected to the inlet of the heating fan (9); A first-circuit chamber pressure monitoring device (10) and a first-circuit chamber temperature monitoring device (13) are provided inside the first-circuit chamber (4), a first-circuit chamber pressure monitoring device (11) is provided inside the pressure vessel (1), and a first-circuit chamber temperature monitoring device (12) is provided inside the steam generator (3); The primary circuit cabin pressure monitoring device (10), the primary circuit pressure monitoring device (11), the charging pressure regulating valve (5), the compressor (6), the primary circuit temperature monitoring device (12), the pressure relief regulating valve (8), the primary circuit cabin temperature monitoring device (13) and the heating fan (9) are respectively connected to the simulation modeling server (16) via a DCS cabinet (14) and a PXI data acquisition cabinet (15).

2. The primary circuit temperature regulating system during cold test of high temperature gas-cooled reactor according to claim 1, characterized in that: The DCS cabinet (14) comprises a DCS cabinet body and a primary circuit cabin pressure measurement card (14-1), a primary circuit pressure measurement card (14-2), a charging pressure regulating valve drive card (14-3), a compressor drive card (14-4), a primary circuit temperature measurement card (14-5), a pressure relief regulating valve drive card (14-6), a primary circuit cabin temperature measurement card (14-7) and a heating fan drive card (14-8) arranged in the DCS cabinet body; The first-circuit cabin pressure measuring card (14-1) is connected to the first-circuit cabin pressure monitoring device (10), the first-circuit pressure measuring card (14-2) is connected to the first-circuit pressure monitoring device (11), the charging pressure regulating valve driving card (14-3) is connected to the charging pressure regulating valve (5), the compressor driving card (14-4) is connected to the compressor (6), the first-circuit temperature measuring card (14-5) is connected to the first-circuit temperature monitoring device (12), the pressure relief regulating valve driving card (14-6) is connected to the pressure relief regulating valve (8), the first-circuit cabin temperature measuring card (14-7) is connected to the first-circuit cabin temperature monitoring device (13), and the heating fan driving card (14-8) is connected to the heating fan (9).

3. The primary circuit temperature regulating system during cold test of a high temperature gas-cooled reactor according to claim 2, characterized in that: The PXI data acquisition cabinet (15) comprises a data acquisition cabinet body and a primary circuit cabin pressure monitoring A / D conversion card (15-1), a primary circuit pressure monitoring A / D conversion card (15-2), a pressure charging regulating valve A / D conversion card (15-3), a compressor driving A / D conversion card (15-4), a primary circuit temperature monitoring A / D conversion card (15-5), a pressure relief regulating valve A / D conversion card (15-6), a primary circuit cabin temperature monitoring A / D conversion card (15-7) and a heating fan driving A / D conversion card (15-8) arranged in the data acquisition cabinet body; The simulation modeling server (16) comprises a primary circuit cabin pressure measurement simulation module (16-1), a primary circuit pressure measurement simulation module (16-2), a charging pressure regulating valve simulation module (16-3), a compressor simulation module (16-4), a primary circuit temperature measurement simulation module (16-5), a pressure relief regulating valve simulation module (16-6), a primary circuit cabin temperature measurement simulation module (16-7) and a heating fan simulation module (16-8); The primary circuit cabin pressure measurement simulation module (16-1) is connected to the primary circuit cabin pressure measurement card (14-1) via the primary circuit cabin pressure monitoring A / D conversion card (15-1); the primary circuit pressure measurement simulation module (16-2) is connected to the primary circuit pressure measurement card (14-2) via the primary circuit pressure monitoring A / D conversion card (15-2); the charging pressure regulating valve simulation module (16-3) is connected to the charging pressure regulating valve drive card (14-3) via the charging pressure regulating valve A / D conversion card (15-3); the compressor simulation module (16-4) is connected to the compressor drive card (14-4) via the compressor drive A / D conversion card (15-4); The primary circuit temperature measurement simulation module (16-5) is connected to the primary circuit temperature measurement card (14-5) via the primary circuit temperature monitoring A / D conversion card (15-5); the pressure relief regulating valve simulation module (16-6) is connected to the pressure relief regulating valve drive card (14-6) via the pressure relief regulating valve A / D conversion card (15-6); the primary circuit cabin temperature measurement simulation module (16-7) is connected to the primary circuit cabin temperature measurement card (14-7) via the primary circuit cabin temperature monitoring A / D conversion card (15-7); and the heating fan simulation module (16-8) is connected to the heating fan drive card (14-8) via the heating fan drive A / D conversion card (15-8).

4. A method for regulating the primary circuit temperature during a cold test of a high temperature gas-cooled reactor, characterized in that: The primary circuit temperature regulation system during the cold test of the high temperature gas-cooled reactor according to claim 3 includes primary circuit pressurization function verification, primary circuit pressure maintaining function verification and primary circuit overpressure protection function verification.

5. The primary circuit temperature adjustment method during cold test of a high temperature gas-cooled reactor according to claim 4, characterized in that: The specific process of verifying the primary circuit charging function is as follows: A first-loop target pressure is set in a first-loop pressure measurement simulation module (16-2); a first-loop pressure signal detected by a first-loop pressure monitoring device (11) is sent to the first-loop pressure measurement simulation module (16-2) via a first-loop pressure measurement card (14-2) and a first-loop pressure monitoring A / D conversion card (15-2); the first-loop pressure measurement simulation module (16-2) inputs the received first-loop pressure signal to a compressor simulation module (16-4) and a charging pressure regulating valve simulation module (16-3); the compressor simulation module (16-4) generates a first control signal according to the first-loop pressure signal and the preset first-loop target pressure; the first control signal is then used to control the compressor (6) via a compressor drive A / D conversion card (15-4) and a compressor drive card (14-4); an action signal fed back by the compressor (6) is input into the compressor simulation module (16-4) via the compressor drive card (14-4) and the compressor drive A / D conversion card (15-4) to test the start-up response characteristics of the compressor (6); At the same time, the charging pressure regulating valve simulation module (16-3) generates a second control signal according to the first-circuit pressure signal and the preset first-circuit target pressure, and then sends the second control signal to the charging pressure regulating valve drive card (14-3) via the charging pressure regulating valve A / D conversion card (15-3) to control the opening of the charging pressure regulating valve (5), so that the charging pressure regulating valve (5) is automatically put into operation and adjusts the charging rate, and the pressure increase rate does not exceed 0.01 MPa / min, and the first circuit starts to be pressurized. Then, the action signal fed back by the charging pressure regulating valve (5) is sequentially input into the charging pressure regulating valve simulation module (16-3) via the charging pressure regulating valve drive card (14-3) and the charging pressure regulating valve A / D conversion card (15-3) to test the opening and dynamic response characteristics of the charging pressure regulating valve (5).

6. The primary circuit temperature adjustment method during cold test of a high temperature gas-cooled reactor according to claim 4, characterized in that: The specific process of verifying the primary circuit pressure maintenance function is as follows: The primary circuit temperature monitoring device (12) monitors the primary circuit temperature signal in real time, and then inputs the primary circuit temperature signal into the primary circuit temperature measurement simulation module (16-5) in sequence through the primary circuit temperature measurement card (14-5) and the primary circuit temperature monitoring A / D conversion card (15-5). The primary circuit temperature measurement simulation module (16-5) calculates the temperature and pressure target values ​​of the primary circuit chamber (4) according to the primary circuit pressure and temperature monitored in real time; The primary circuit cabin temperature monitoring device (13) detects the temperature signal of the primary circuit cabin (4) in real time, and transmits the temperature signal of the primary circuit cabin (4) to the primary circuit cabin temperature measurement simulation module (16-7) in sequence via the primary circuit cabin temperature measurement card (14-7) and the primary circuit cabin temperature monitoring A / D conversion card (15-7); the primary circuit cabin temperature measurement simulation module (16-7) sends the temperature signal of the primary circuit cabin (4) to the heating fan simulation module (16-8); the primary circuit cabin pressure monitoring device (10) detects the pressure signal of the primary circuit cabin (4) in real time, and then transmits the pressure signal to the primary circuit cabin pressure measurement simulation module (16-1) via the primary circuit cabin pressure measurement card (14-1) and the primary circuit cabin pressure monitoring A / D conversion card (15-1); the primary circuit cabin pressure measurement simulation module (16-1) sends the pressure signal of the primary circuit cabin (4) to the heating fan simulation module (16-8); The heating fan simulation module (16-8) generates a third control signal based on the pressure signal of the first-circuit chamber (4), the temperature signal of the first-circuit chamber (4), and the calculated temperature and pressure target values ​​of the first-circuit chamber (4), and sends the third control signal to the heating fan drive card (14-8) via the heating fan drive A / D conversion card (15-8) to control the rotation speed of the heating fan (9), wherein the action signal fed back by the heating fan (9) is sequentially input into the heating fan simulation module (16-8) via the heating fan drive card (14-8) and the heating fan drive A / D conversion card (15-8) to test the start-up response and rotation speed regulation characteristics of the heating fan (9).

7. The primary circuit temperature adjustment method during cold test of a high temperature gas-cooled reactor according to claim 4, characterized in that: The specific process of primary circuit overpressure protection function verification is as follows: During the primary circuit charging process, when the primary circuit pressure is higher than 10% of the design pressure, the primary circuit pressure signal measured by the primary circuit pressure monitoring device (11) is transmitted to the primary circuit pressure measurement simulation module (16-2) via the primary circuit pressure measurement card (14-2) and the primary circuit pressure monitoring A / D conversion card (15-2); the compressor simulation module (16-4) sends a stop signal of the compressor (6), which is then transmitted to the compressor drive card (14-4) via the compressor drive A / D conversion card (15-4) to drive the compressor. The compressor (6) stops; at the same time, the charging pressure regulating valve simulation module (16-3) sends a closing signal of the charging pressure regulating valve (5), which is then transmitted to the charging pressure regulating valve driving card (14-3) via the charging pressure regulating valve A / D conversion card (15-3) to drive the charging pressure regulating valve (5) to close; the pressure relief regulating valve simulation module (16-6) sends a full opening signal of the pressure relief regulating valve (8), which is then transmitted to the pressure relief regulating valve driving card (14-6) via the pressure relief regulating valve A / D conversion card (15-6) to drive the pressure relief regulating valve (8) to open quickly; The action signal fed back by the compressor (6) is sequentially input into the compressor simulation module (16-4) via the compressor drive card component (14-4) and the compressor drive A / D conversion card component (15-4) to test the stop response characteristics of the compressor (6); the action signal fed back by the charging pressure regulating valve (5) is sequentially input into the charging pressure regulating valve simulation module (16-3) via the charging pressure regulating valve drive card component (14-3) and the charging pressure regulating valve A / D conversion card component (15-3) to test the closing time of the charging pressure regulating valve (5); the action signal fed back by the pressure relief regulating valve (8) is sequentially input into the pressure relief regulating valve simulation module (16-6) via the pressure relief regulating valve drive card component (14-6) and the pressure relief regulating valve A / D conversion card component (15-6) to test the opening time of the pressure relief regulating valve (8); When the pressure of a circuit is reduced to 5% of the design pressure, the pressure relief regulating valve simulation module (16-6) outputs an automatic adjustment signal of the pressure relief regulating valve (8), which is then transmitted to the pressure relief regulating valve driving card (14-6) via the pressure relief regulating valve A / D conversion card (15-6) to drive the pressure relief regulating valve (8) to gradually close and automatically adjust the pressure of the circuit to the design pressure and maintain pressure stability; the action signal fed back by the pressure relief regulating valve (8) is sequentially input into the pressure relief regulating valve simulation module (16-6) via the pressure relief regulating valve driving card (14-6) and the pressure relief regulating valve A / D conversion card (15-6) to test the closing time and dynamic response characteristics of the pressure relief regulating valve (8).

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