The Design Of Data Acquisition & Processing System For Nuclear Normal Residual Heat Removal Pump Thermal Shock Test Bench

With the rapid economic development of China, air pollution is becoming more serious, so it is urgent to adjust the energy structure. As a clean and efficient energy, Nuclear power will gradually replace traditional petrochemical energy sources such as coal, petroleum and will become an important part of energy structure in the future. On the basis of introducing and absorbing nuclear power technology AP1000 of Westinghouse in America, the third generation of high power passive nuclear unit CAP1400 nuclear power technology with its independent intellectual property rights has been researched successfully and will be applied to the pressurized water reactor demonstration project of State Nuclear Power Engineering Company.Normal residual heat removal pump(RHR pump) is an important equipment in CAP1400 Nuclear Power Plant Normal Residual Heat Removal System, the main function of this pump is to remove the heat from reactor coolant system during the period of normal shut-down in nuclear power plant. So it is very important for the safe shut-down of nuclear power plant. To ensure safe and reliable operation of the RHR pump in nuclear power plant, it's required to carry out thermal shock test on the sample RHR pump, the specific requirements are: when pump flow rate in 490 m3/h(design condition), pump inlet water temperature should rise from 10? to no less than 177? within 30 seconds and the pump should run continuously for more than 3 hours under this flow rate and temperature.To perform the thermal shock test, it is necessary to prepare a bench for thermal shock test. But there are few domestic manufacturers owning this kind of test bench such as Shenyang Blower and Shanghai Kaiquan. Because of the factors of competition and test costs, it's not practical to outsource the thermal shock test. In view of this situation, this paper carries out research on key technology of thermal shock test data acquisition & processing system for RHR Pump and applies the research results to the transformation of thermal shock test bench then validates through test. Main work as follows:(1) Through comparison and analysis for the existing structures and properties of thermal shock test bench to determine the general test plan for RHR Pump.(2) According to the requirements of parameters for thermal impact test, determining the hardware and performance indicator of data acquisition that needed for the test.(3) Using LabVIEW virtual instrument measurement technology platform to build measuring and control platform among temperature sensor, temperature transmitter, data acquisition cards and computer, forming temperature data acquisition and processing system for thermal shock test.(4) Using LabVIEW virtual instrument measurement technology platform to build measuring and control platform among vibration sensor, data acquisition cards, chassis and computer, forming vibration data acquisition and processing system for thermal shock test.(5) Jointly debugging for the hardware and software in measuring and controlling section, and verifying design by small size test.(6) Actual thermal shock test for RHR Pump, verifying the feasibility and practicability of hardware and software technology for thermal shock test data acquisition and processing system raised by this paper.Based on the specific requirements of RHR Pump and through appropriate transformation for existing hot test bench, this paper has simulated the thermal shock condition of RHR Pump and built related measuring and control platform then record the actual thermal shock working condition and form complete thermal shocktest report to provide the test data for engineering application of RHR Pump.