The seismic test of the nuclear island explosion-proof wave valve designed and manufactured by Datong Baofu was successful

Recently, the Nuclear Island Explosion Proof Wave Valves (Safety Level LS, Quality Assurance Level QA2, Earthquake Resistance Category 1A) of CNPC Fuqing Nuclear Power Units 5 and 6, which were designed and manufactured by Nantong Datong Baofu, were used in the National Key Experiment for Civil Engineering Disaster Prevention at Tongji University in Shanghai. The chamber was subjected to a seismic test and was successfully completed. The product will enter the formal production stage. Previously, Dunan Environmental has undertaken the design and production tasks of all nuclear-stage chillers and seismic-resistant air-cooled units at Fuqing Nuclear Power Plant. The successful seismic test of the nuclear island explosion-proof wave valve will further lay a good foundation for follow-up projects.
Fuqing Nuclear Power Station Units 5 and 6 are the first demonstration project of China’s own third-generation nuclear power technology “Hualong No. 1”. In July last year, Dunan Environment and China Nuclear Power Engineering Co., Ltd. formally signed a contract, China National Nuclear Corporation ordered the company to use nuclear explosion-proof wave valve equipment for two million-kilowatt nuclear power units of Fuqing Nuclear Power Station No. 5 and No. 6 units. Explosion-proof wave valve equipment is mainly used in all outdoor air inlets of nuclear island ventilation system that need to resist outdoor explosion and tornadoes. When the above-mentioned accidents occur, it can quickly close the isolation, prevent the ventilation system from being subjected to the impact of instantaneous pressure, and ensure the ventilation system piping and The integrity of the equipment.
The response spectrum (RRS) of the nuclear island explosion-proof wave valve that participated in the seismic test was obtained by selecting the damping ratio of 2% of the floor spectrum of the highest installation position of the explosion-proof wave valve in each factory. A total of five SL-1 earthquake assessment tests were conducted and One SL-2 earthquake assessment test. The test proved that the explosion-proof valve structure and working performance remain intact and fully meet the seismic requirements.
Previously, Dunan Environment has successfully won the bid for all nuclear grade chiller units and seismic-resistant air-cooled units for the No. 5 and No. 6 nuclear power plants in the Fuqing Nuclear Power Plant in Fujian Province, including 14 nuclear units, 6 seismic units, and 14 nuclear units. Island chiller and its auxiliary equipment, and signed a supply contract, completed delivery in 2016. In addition to the previously awarded Fuqing Nuclear Power Plant No. 1, No. 2 and No. 3 and No. 4, the Dunan Environment has successfully signed all nuclear-grade chillers and seismic-resistant air-cooled units with the Fuqing Nuclear Power Plant. The Fuqing Nuclear Power Plant project has also become The Dunan Environment followed another major breakthrough after the contracted supply contract for Tianwan Nuclear Power Station.

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