On March 17, 2017, under the support of the National Science and Technology Major Project of "Large-scale Advanced PWR and HTGR Nuclear Power Station", the hydrostatic test of Reactor Pressure Vessel of CAP1400 Demonstration Project was successfully completed.
The hydrostatic test design pressure of 17.2MPa, the hydrostatic test is divided into pressure vessel body hydrostatic test and internal and external O-ring leak test two stages, the overall hydrostatic test pressure of 21.5MPa, dwell time of 10 minutes, During the pressure drop to 17.2MPa, the inner and outer O-ring leak test, the indicators during the hydraulic test are in line with design requirements, the whole no leakage, sweating and so on.
The hydrostatic test was successfully completed in one go, which indicates that the CAP1400 reactor pressure vessel designed and developed by China has achieved localization and laid a solid foundation for the batch construction of the third generation nuclear power.
Reactor pressure vessel is the core equipment of a nuclear power plant. It is the most important safety barrier that does not contain radioactive substances and can not be replaced within 60 years of life. Its advanced nature is crucial to ensure the safety and reliability of the operation of a nuclear power plant. The reactor pressure vessel independently designed by the State Nuclear Power Shanghai Nuclear Institute independently manufactured by China, using integrated roof and integrated bottom seal, reducing the number of welds, greatly reducing the workload of in-service inspection and improve the nuclear power Plant safety and economy. In addition, the reactor pressure vessel forging diameter size, high performance requirements, the overall weight, is the world's most demanding nuclear-level master one.
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