The prevention of fatigue damages is a crucial issue for NPPs （nuclear power plants）. The AFC （AR.EVA fatigue concept） provides for a multi-step and mnlti-disciplinary process against fatigue during the design and...The prevention of fatigue damages is a crucial issue for NPPs （nuclear power plants）. The AFC （AR.EVA fatigue concept） provides for a multi-step and mnlti-disciplinary process against fatigue during the design and operating phase of NPPs. The entire process of fatigne design is based on an installed FAMOS （fatigue monitoring system）. In this way, realistic load data are available to manage the component ageing and enable the optimization of operating modes. The measured temperatures are processed via a FFE （fast fatigue evaluation）. Thus, an online fatigue evaluation of the cumulative usage factor is performed after every operational cycle. This procedure gives a first fatigue status of the power plant. Furthermore, a DFC （detailed fatigue calculation） conforming to the code rules is carried out in order to determine the state of the plant at the highest loaded positions. These finite element analyses include determination of thermal transient and subsequent stresses and strains. Fatigue environmental factors are taken into account in these studies.展开更多
The AREVA CRAFT （control room accident filtration system） is a solution that maintains the proper air conditions in the main control room and emergency control facilities by filtering the air and removing noble gase...The AREVA CRAFT （control room accident filtration system） is a solution that maintains the proper air conditions in the main control room and emergency control facilities by filtering the air and removing noble gases in case of a severe accident in a nuclear power plant with increased activity concentration in the plant environment.展开更多
为了实现配电线路故障的快速、有选择性的切除、隔离与恢复,缩小停电面积并减小停电时间,提出一种新型配电线路自动化系统。新系统由断路器、配电线路无通道保护DNCP(distribution line non-communication protection)和备用电源自动投...为了实现配电线路故障的快速、有选择性的切除、隔离与恢复,缩小停电面积并减小停电时间,提出一种新型配电线路自动化系统。新系统由断路器、配电线路无通道保护DNCP(distribution line non-communication protection)和备用电源自动投入单元三部分组成。配电线路发生故障后,故障区段两端的断路器在配电线路无通道保护的作用下动作跳闸,切除故障部分;失去电源的非故障区段在备用电源自动投入单元的控制下,投入备用电源,恢复相应区段的正常供电。新模式切除故障只需要一次断路器动作,一条具有6分段的配电线路最长故障切除时间小于1.1 s,非故障区段失电时间小于1.2 s。展开更多
文摘The prevention of fatigue damages is a crucial issue for NPPs （nuclear power plants）. The AFC （AR.EVA fatigue concept） provides for a multi-step and mnlti-disciplinary process against fatigue during the design and operating phase of NPPs. The entire process of fatigne design is based on an installed FAMOS （fatigue monitoring system）. In this way, realistic load data are available to manage the component ageing and enable the optimization of operating modes. The measured temperatures are processed via a FFE （fast fatigue evaluation）. Thus, an online fatigue evaluation of the cumulative usage factor is performed after every operational cycle. This procedure gives a first fatigue status of the power plant. Furthermore, a DFC （detailed fatigue calculation） conforming to the code rules is carried out in order to determine the state of the plant at the highest loaded positions. These finite element analyses include determination of thermal transient and subsequent stresses and strains. Fatigue environmental factors are taken into account in these studies.
文摘The AREVA CRAFT （control room accident filtration system） is a solution that maintains the proper air conditions in the main control room and emergency control facilities by filtering the air and removing noble gases in case of a severe accident in a nuclear power plant with increased activity concentration in the plant environment.
基金supported by Special Fund of the National Basic Research Program of China(No.2009CB219704)the National High Technology Research and Development Programof China(863 Program)(No.2007AA05Z241)+1 种基金National Natural Science Foundation of China(No.50977061)Natural Science Foundation of Tianjin City(No.08JCYBJC13500)
