The EAHT-A type safe fully automatic water pressure test device for nuclear capacitors is independently developed by our company and applied to the factory water pressure test of pressure vessels used in nuclear power plants. This device fully meets the working conditions requirements of pressure vessel hydrostatic testing for nuclear power plants, including system cleanliness, system material, testing process (boosting, maintaining, and unloading), testing parameters, and other requirements. This water pressure testing device is not only suitable for water pressure testing of pressure vessels used in nuclear power plants, but also for industries such as petroleum, chemical, and aerospace that require strict control of system cleanliness levels, precise control of system pressure accuracy, and pressure rise and fall speed. It is required that the pressure testing device has multiple safety protection measures.

The electrical and instrument control cabinet equipment of the backup diesel generator set in nuclear power plants mainly includes control cabinet, speed cabinet, machine side cabinet, electrical protection cabinet, medium voltage cabinet, and excitation cabinet, and all must meet the design principles of quality assurance level Q2, seismic level I, and design life of 60 years. The equipment adopts the floor response spectrum of the envelope Hualong 1 (Fangchenggang Units 3 and 4) for seismic test identification.

CRDM pressure shell Ω sealing weld field hydraulic test device is independently developed by our company, which is used in the sealing test of nuclear power plant CRDM pressure shell and thermocouple tube seat Ω sealing weld after on-site welding. 

During the test, the upward thrust of the Jack is used to realize the plane seal or cone seal between the pressure-bearing shell of the hydraulic device and the pressure shell of the RPV top cover or the thermocouple pipe seat, and the on-site hydraulic test of the Ω sealing weld of the CRDM pressure shell is realized by pressurizing the airtight space by the high pressure pressing system. 

The test process roughly includes: installation of test equipment, water filling, exhaust, pressure boosting, pressure preservation, pressure reduction, drainage and so on. 

Each RPV top cover has 65 sockets that need to be tested by hydraulic pressure.

HPTS/SG- 1B SG secondary side hydraulic test device is independently developed by our company and is used in the hydraulic test of steam generator in nuclear power plant before the second side service. 

The device circulates the test medium on the secondary side of the steam generator (A desalted water + ammonia + hydrazine, the total volume is about 200m ³), so as to indirectly heat the wall temperature of the steam generator to the test temperature of 30 ℃ ~ 45 ℃. 

Then complete the whole process of pressure boosting (12.8MPa), pressure holding and pressure relief on the secondary side of the steam generator. 

The device fully meets the requirements of the hydraulic test on the secondary side of the installed steam generator in the reactor building, including the requirements of site installation environment, working conditions, interface conditions, test process (water filling, exhaust, heating, pressure rise, pressure preservation, pressure relief), test parameters and so on.