CN-122000105-A - Multifunctional test bed and test method for researching performance of primary loop voltage stabilizer of reactor

CN122000105ACN 122000105 ACN122000105 ACN 122000105ACN-122000105-A

Abstract

The invention provides a multifunctional test bed and a test method for researching the performance of a primary loop voltage stabilizer of a reactor. The test bed mainly comprises a water supplementing system, a main loop system, a steam and inert gas pressure stabilizing system and a drainage system. The test bed can be used for simulating a cold starting process of a loop of a traditional reactor, and respectively obtaining the starting characteristics of the steam voltage stabilizer and the inert gas voltage stabilizer serving as time loops, so that the test bed provides a basis for evaluating the performances of different voltage stabilizers.

Inventors

ZENG XIAOBO
ZHOU ZHANMING
TANG YINYUAN
WANG JIANJUN
WANG MENG
HAN XU
CHENG JIE
WU DI

Assignees

哈尔滨工程大学

Dates

Publication Date: 20260508
Application Date: 20260203

Claims (10)

1. The multifunctional test bed for researching the performance of the primary loop voltage stabilizer of the reactor is characterized by comprising a water supplementing system, a main loop system, a steam and inert gas voltage stabilizing system and a drainage system, wherein the drainage system, the steam and inert gas voltage stabilizing system, the main loop system and the water supplementing system are sequentially connected; The water supplementing system consists of a water tank, a water supplementing pump, a flowmeter, a resin deaerator, a connecting pipeline and a valve; the main loop system consists of a pressure vessel simulation body, a main pump, a flowmeter, a connecting pipeline and a valve; The steam and inert gas pressure stabilizing system consists of a steam pressure stabilizer simulator, an inert gas pressure stabilizer simulator, an upper charging pump, a connecting pipeline and a valve; The drainage system consists of a drainage tank, a heat exchanger, a flowmeter, a connecting pipeline and a valve.
2. The multifunctional test bed according to claim 1, wherein the water tank is provided with an electric heater and a heat preservation layer, the connecting pipeline is provided with the electric heater and the heat preservation layer, and the steam voltage stabilizer simulator is provided with the electric heater and the heat preservation layer.
3. The multifunctional test bed of claim 2, wherein the top of the pressure vessel simulation body is provided with an exhaust valve and a safety valve, the bottom of the pressure vessel simulation body is connected with a drainage system through a connecting pipeline, the pressure vessel simulation body is provided with a heat preservation layer, and the pressure vessel simulation body is provided with a temperature measuring point and a pressure measuring point.
4. The multifunctional test bed of claim 3, wherein the top of the steam pressure stabilizer simulator is provided with an exhaust valve and a safety valve, the top of the steam pressure stabilizer simulator is provided with pressure measuring points, the top of the steam pressure stabilizer simulator is provided with temperature measuring points distributed at different positions from top to bottom, and the bottom of the steam pressure stabilizer simulator is connected with a main loop system.
5. The multifunctional test bench according to claim 4, wherein the top of the inert gas pressure stabilizer simulator is provided with an exhaust valve, an inflation valve and a safety valve, the inflation valve is connected with a high-pressure inert gas storage bottle through a connecting pipeline, the valve connected with the high-pressure inert gas storage bottle and the top exhaust valve of the inert gas pressure stabilizer simulator are controlled by a control system, the internal pressure of the inert gas pressure stabilizer simulator can be adjusted, the bottom of the inert gas pressure stabilizer simulator is connected with a drainage system, and the inert gas pressure stabilizer simulator is provided with pressure measuring points and temperature measuring points distributed at different positions from top to bottom.
6. The multifunctional test stand according to claim 5, wherein the drain tank is connected to the main circuit system and the inert gas stabilizer simulator, respectively, and the drain position is controlled by adjusting the valve opening and closing.
7. The multifunctional test stand according to claim 6, wherein the drain tank is communicated with a drain valve at the bottom, a vent valve controlled by a control system is arranged at the top and is communicated with a high-pressure inert gas storage bottle and a vent valve controlled by the control system, and the pressure in the drain tank is regulated by the control system.
8. A test method based on the multifunctional test bed for researching the performance of the reactor-loop voltage stabilizer of any one of claims 1 to 7 is characterized in that the method comprises the steps of heating water in a water tank to a specified temperature by an electric heater in the water tank, and then turning off the electric heater; Opening the top exhaust valve of each simulation body, opening a resin deaerator communication loop to deaerate water filled into the system, starting a water supplementing pump, opening a water supplementing valve in the system to supplement water to the system, and sequentially closing the top exhaust valve after water injection in each simulation body is completed; The control system is used for setting the back pressure of the drain tank, and the control system is used for controlling the air supplementing and pressurizing or the air exhausting and pressure reducing in the drain tank.
9. The method of claim 8, wherein when the steam stabilizer simulator is used for testing, a valve for communicating the inert gas stabilizer simulator with the loop is closed, a main pump is started to start flowing water in the loop, an electric heater in the main loop and the steam stabilizer simulator simulate an electric heater in the main loop are started to proper power, the water in the loop is heated according to a specified rate, and whether the heating rate in the loop is the same as the heating rate in the steam stabilizer simulator is controlled by adjusting the power of the electric heater and the opening and closing of the charging pump; When the specified pressure is reached in the loop, a communication valve of the loop and the drain tank is opened for draining, the opening of the valve can be adjusted according to the drain speed requirement, and the communication valve is closed to finish draining after the valve is reduced to the specified pressure; after the temperature in the steam pressure stabilizer simulation body is raised to a specified temperature, an electric heater in the main loop is turned off, an electric heater in the steam pressure stabilizer is kept on, a system drain valve is turned on, steam is generated in the steam pressure stabilizer simulation body, a steam cavity is started to be established, drainage is turned on at the moment, the temperature is controlled to be maintained above the saturation temperature by adjusting a switch of the electric heater, the pressure is maintained to be near the pressure corresponding to the saturation temperature until the specified liquid level is reached in the steam pressure stabilizer simulation body, the steam cavity is established, and the starting process is completed.
10. The method of claim 8, wherein when the inert gas regulator simulator is used for testing, a valve communicated with the loop by the steam regulator simulator is closed, an inflation valve of the inert gas regulator simulator is opened, a high-pressure inert gas storage bottle is used for pressurizing the system, the back pressure of the pressure release valve is regulated to be a specified pressure by the control system, a system drain valve of the inert gas regulator simulator communicated with the drain tank is opened, drainage and pressurization are simulated in the inert gas regulator, when the water level in the inert gas regulator simulator reaches the specified liquid level, the system drain valve is closed, and inflation pressurization is finished; starting the main pump to enable water in the loop to flow, starting the electric heater in the main loop to proper power, and heating the water in the loop according to a specified rate; when the specified pressure is reached in the loop, a communication valve between the inert gas voltage stabilizer simulator and the loop or a communication valve between the loop and the drain tank is opened for draining, and after the specified pressure is reduced, the communication valve is closed for ending the draining; After the water in the loop and the pressure vessel simulator is heated to the specified temperature, the electric heater in the main loop is turned off, and the starting process is completed.

Description

Multifunctional test bed and test method for researching performance of primary loop voltage stabilizer of reactor Technical Field The invention relates to the technical field of reactor thermal hydraulic power, in particular to a multifunctional test bed and a test method for researching the performance of a primary loop voltage stabilizer of a reactor. Relates to a reactor nuclear power plant steam and inert gas pressure stabilizing system, in particular to a test device for researching the pressure stabilization of the reactor steam and the inert gas. Background In a primary loop system of a pressurized water reactor, a pressure stabilizer is used as a core device for maintaining the pressure stability of the system, and the safe operation of the reactor is ensured by absorbing volume fluctuation caused by the temperature change of a coolant and suppressing pressure transient. The prior engineering application mainly comprises two technical routes of a steam pressure stabilizer and an inert gas pressure stabilizer, wherein the steam pressure stabilizer maintains a saturated steam cavity by utilizing an electric heater and realizes pressure adjustment based on gas-liquid two-phase balance, and the inert gas pressure stabilizer adopts inert gas such as nitrogen as a pressure compensation medium and absorbs fluctuation by means of gas compressibility. The existing research means are mostly aimed at the isolated bench test of single type voltage stabilizer, and especially lack of comprehensive experimental platform capable of evaluating two voltage stabilizers under the same set of comparable conditions, which leads to lack of direct and reliable experimental basis for a reactor designer in the process of model selection. Therefore, it is necessary to develop a multifunctional test bench and a test method, wherein the bench can simulate the main thermal hydraulic process of a loop, and test key performance parameters such as pressure control, dynamic response time, stability margin and the like of the loop under the identical boundary condition and disturbance working condition by accurately controlling and measuring, so as to provide solid experimental data and support for scientific selection of the voltage stabilizer under different application scenes. Disclosure of Invention The invention aims to solve the problems in the prior art, and provides a multifunctional test bench and a test method for researching the performance of a primary loop voltage stabilizer of a reactor aiming at the starting process of a traditional pressurized water reactor nuclear power device. The test bed is a test device for researching the influence of an inert gas voltage stabilizer or a steam voltage stabilizer on the temperature and the pressure in a system in the starting process in the cold starting process of a nuclear reactor. The invention is realized by the following technical scheme, and provides a multifunctional test bed for researching the performance of a primary loop voltage stabilizer of a reactor, which comprises a water supplementing system, a main loop system, a steam and inert gas voltage stabilizing system and a drainage system, wherein the drainage system, the steam and inert gas voltage stabilizing system, the main loop system and the water supplementing system are sequentially connected; The water supplementing system consists of a water tank, a water supplementing pump, a flowmeter, a resin deaerator, a connecting pipeline and a valve; the main loop system consists of a pressure vessel simulation body, a main pump, a flowmeter, a connecting pipeline and a valve; The steam and inert gas pressure stabilizing system consists of a steam pressure stabilizer simulator, an inert gas pressure stabilizer simulator, an upper charging pump, a connecting pipeline and a valve; The drainage system consists of a drainage tank, a heat exchanger, a flowmeter, a connecting pipeline and a valve. Further, the water tank is provided with an electric heater and a heat preservation layer, the connecting pipeline is provided with the electric heater and the heat preservation layer, and the steam voltage stabilizer simulator is provided with the electric heater and the heat preservation layer. Further, the top of the pressure vessel simulation body is provided with an exhaust valve and a safety valve, the bottom of the pressure vessel simulation body is connected with a drainage system through a connecting pipeline, the pressure vessel simulation body is provided with a heat preservation layer, and the pressure vessel simulation body is provided with a temperature measuring point and a pressure measuring point. Further, an exhaust valve and a safety valve are arranged at the top of the steam voltage stabilizer simulator, pressure measuring points are arranged at the top of the steam voltage stabilizer simulator, temperature measuring points distributed at different positions are arranged from top to bottom, and the bottom of the