Cold functional testing has been completed at Unit 6 of the Tianwan nuclear power station in Jiangsu province, eastern China, marking the transfer of the 1,000-MW pressurised water reactor unit from the equipment installation stage to the commissioning stage, China National Nuclear Corporation said.
Cold functional tests are carried out to confirm whether safety systems are properly installed and ready to operate in a cold conditions. They are the first comprehensives tests to check the performance of the entire reactor.
The main purpose of the tests is to verify the leak-tightness of the primary circuit and components such as pressure vessels, pipelines and valves of both the nuclear and conventional islands, and to clean the main circulation pipes.
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