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. 1â€. 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.
Recently, respiratory diseases have been "stable" in the first place among the patients treated. Professor Tong Zhaohui, deputy director of the Institute of respiratory diseases, Beijing Chaoyang Hospital, said that winter and spring were the high incidence seasons of respiratory diseases such as acute upper respiratory tract infection, influenza and acute pneumonia. The high temperature provided many favorable conditions for many pathogens, and the breathing system was most susceptible to pathogens, so in warm winter, Respiratory infections will increase. In addition, the dry weather brought by warm winter also contributed to the fire.
"It's bad for human health if it doesn't snow." Mei Xue, deputy chief physician of the emergency department of Beijing Chaoyang Hospital, said that the air is dry, and people are prone to dry lips, bleeding nostrils and itchy throat.
Research shows that when the air humidity reaches 45% - 65%, it is conducive to the treatment and rehabilitation of lower respiratory tract diseases. When the air humidity is lower than 40%, the respiratory mucosa of nose and lung will be dehydrated and the elasticity will be reduced, making dust and bacteria easy to adhere to the mucosa, stimulating the throat, causing cough, pneumonia and asthma. Snow can purify the air and eliminate pollution. If it doesn't snow, it is easy to have multiple respiratory diseases such as asthma and pneumonia.
Experts suggest that when you go out in dry days, you must keep warm and pay attention to the temperature difference between indoor and outdoor. The indoor temperature should not be too high. The room temperature should be about 18 ℃ and the relative humidity should be controlled at 30% to 40%. For the elderly with respiratory diseases, it is best to wear masks when going out. In the weather with high air pollution index, outdoor activities should be reduced. It is recommended to breathe with your nose. Your nose can "humidify" the air, so as to purify the air and reduce the invasion of bacteria. Wash your hands more. When you go home from outside, you must wash your hands well with soap. In addition, we should also pay attention to drink more water, strengthen exercise, and ensure adequate sleep and nutrition
Experts suggest that in a dry environment, Aroma Diffuser can be used to alleviate air drying, moisturize the skin and solve the problem of drying
Fuqing Nuclear Power Station Units 5 and 6 are the first demonstration project of China’s own third-generation nuclear power technology “Hualong No. 1â€. 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.
Experts recommend breathing with your nose
Recently, respiratory diseases have been "stable" in the first place among the patients treated. Professor Tong Zhaohui, deputy director of the Institute of respiratory diseases, Beijing Chaoyang Hospital, said that winter and spring were the high incidence seasons of respiratory diseases such as acute upper respiratory tract infection, influenza and acute pneumonia. The high temperature provided many favorable conditions for many pathogens, and the breathing system was most susceptible to pathogens, so in warm winter, Respiratory infections will increase. In addition, the dry weather brought by warm winter also contributed to the fire.
"It's bad for human health if it doesn't snow." Mei Xue, deputy chief physician of the emergency department of Beijing Chaoyang Hospital, said that the air is dry, and people are prone to dry lips, bleeding nostrils and itchy throat.
Research shows that when the air humidity reaches 45% - 65%, it is conducive to the treatment and rehabilitation of lower respiratory tract diseases. When the air humidity is lower than 40%, the respiratory mucosa of nose and lung will be dehydrated and the elasticity will be reduced, making dust and bacteria easy to adhere to the mucosa, stimulating the throat, causing cough, pneumonia and asthma. Snow can purify the air and eliminate pollution. If it doesn't snow, it is easy to have multiple respiratory diseases such as asthma and pneumonia.
Experts suggest that when you go out in dry days, you must keep warm and pay attention to the temperature difference between indoor and outdoor. The indoor temperature should not be too high. The room temperature should be about 18 ℃ and the relative humidity should be controlled at 30% to 40%. For the elderly with respiratory diseases, it is best to wear masks when going out. In the weather with high air pollution index, outdoor activities should be reduced. It is recommended to breathe with your nose. Your nose can "humidify" the air, so as to purify the air and reduce the invasion of bacteria. Wash your hands more. When you go home from outside, you must wash your hands well with soap. In addition, we should also pay attention to drink more water, strengthen exercise, and ensure adequate sleep and nutrition
Experts suggest that in a dry environment, Aroma Diffuser can be used to alleviate air drying, moisturize the skin and solve the problem of drying
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