The hydropower installed capacity in China exceeded 100 GW by the end of 2004. With the develop-ment of hydropower construction cause, the contingents of electrical and mechanical installation also grew steadily.The i...The hydropower installed capacity in China exceeded 100 GW by the end of 2004. With the develop-ment of hydropower construction cause, the contingents of electrical and mechanical installation also grew steadily.The installation and debugging techniques made great strides in aspects of different conventional hydrogeneratorsets, reversible pumped-storage units and their rotor spiders, runners, bearings, penstocks as well as controlequipment, such as computerized governors, intelligent monitoring devices. Major technical innovations werebrought about in the electrical and mechanical installation. For an arduous task to construct hydropower projectsof over 50 GW confronts hydropower installation enterprises at the beginning of 21 st century, the installationtechnologies will certainly develop around the projects.展开更多
In order to ensure the highest safety requirements, nuclear power plant structures (the containment structures, the fuel storages and transportation systems) should be assessed against all possible internal and extern...In order to ensure the highest safety requirements, nuclear power plant structures (the containment structures, the fuel storages and transportation systems) should be assessed against all possible internal and external impact threats. The internal impact threats include kinetic missiles generated by the failure of high pressure vessels and pipes, the failure of high speed rotating machineries and accidental drops. The external impact threats may come from airborne missiles, aircraft impact, explosion blast and fragments. The impact effects of these threats on concrete and steel structures in a nuclear power plant are discussed. Methods and procedures for the impact assessment of nuclear power plants are introduced. Recent studies on penetration and perforation mechanics as well as progresses on dynamic properties of concrete-like materials are presented to increase the understanding of the impact effects on concrete containment structures.展开更多
This paper investigates the performance of SAPFs （shunt active power filters） which are introduced in order to address the quality issues in electrified railway supply systems. These filters can be installed at eith...This paper investigates the performance of SAPFs （shunt active power filters） which are introduced in order to address the quality issues in electrified railway supply systems. These filters can be installed at either the S/S （substation） end or at the SP （sectioning post） of the railway feeding power system. In this investigation novel control algorithms, based on the synchronously rotating frame of reference, are proposed for the case when the SAPF is installed at the substation end and its performance is assessed. The effectiveness of the proposed control algorithms are illustrated via Matlab/SimPower computer simulations and validated via comparisons with other publications. This investigation demonstrated that when the SAPF is installed at the substation side, it can effectively compensate for the higher harmonic supply current. In addition, the reactive power demand is fully compensated for, leading to close to unity power factor. However, the voltage drop/sag at the locomotive power supply feed point is only partially compensated for.展开更多
The thesis researches the safety infonnation and control system （SICS） design principle and introduces engineering application in CPR1000 nuclear power station in China. The SICS provides sufficient control and moni...The thesis researches the safety infonnation and control system （SICS） design principle and introduces engineering application in CPR1000 nuclear power station in China. The SICS provides sufficient control and monitoring means to bring and maintain the plant in a safe state as a backup of main computerized control mean （MCM）, in any plant conditions that are probable during a planed or unplanned unavailability of the MCM. The successful engineering applications of SICS in different digital I＆C system platform are introduced in the paper. The thesis gives the research conclusion for new general SICS of digital I＆C system.展开更多
AREVA operates a world-wide unique thermal hydraulic platform to ensure high safety standards in the nuclear industries. This platform is operated as an accredited test and inspection body according to ISO 17025 and 1...AREVA operates a world-wide unique thermal hydraulic platform to ensure high safety standards in the nuclear industries. This platform is operated as an accredited test and inspection body according to ISO 17025 and 17020 to grant a high and independently confmned quality standard. The accreditation also ensures the independency of the organization and confidentiality to the individual stakeholders, for example research centers, utilities, components suppliers, engineering companies and vendors. Especially for nuclear power plants, it is very relevant to consider that reliability depends on the integrity of its components during its life time-from design through construction, operation and maintenance. For example, a typical NPP （nuclear power plant） has 1,000 to 2,000 large valves and 7,500 to 12,500 small valves, of which about 200 to 400 are designated Safety Class 1. The qualification of these Safety Class 1 components is relevant for reactor new builds but also for installed plants. This paper explains newly established qualification tasks, the corresponding testing infrastructure, and the state of the art of testing technology. By way of example, the paper describes the program and possible sequence of qualifying NPP safety-related components.展开更多
Hydropower changes lives in Equatorial GuineaBefore the Djiploho Hydropower Station（DHS）was built,Djiploho was a secluded forest village in Equatorial Guinea.The change has shone a spotlight on the Wele River,now qu...Hydropower changes lives in Equatorial GuineaBefore the Djiploho Hydropower Station（DHS）was built,Djiploho was a secluded forest village in Equatorial Guinea.The change has shone a spotlight on the Wele River,now quite literally the center of power.Liu Bao,chief supervisor of the DHS project,展开更多
The Fourth Nuclear Security Summit—to be held in Washington,D.C.from March31 to April 1—will be of particular importance with regards to the Democratic People’s Republic of Korea’s recent announcement that it will...The Fourth Nuclear Security Summit—to be held in Washington,D.C.from March31 to April 1—will be of particular importance with regards to the Democratic People’s Republic of Korea’s recent announcement that it will conduct a nuclear warhead explosion test and the fifth anniversary of the Fukushima nuclear power plant accident in March.President Xi Jinping will attend the summit and elaborate on the global nuclear security situation and China’s nuclear security concept.展开更多
文摘The hydropower installed capacity in China exceeded 100 GW by the end of 2004. With the develop-ment of hydropower construction cause, the contingents of electrical and mechanical installation also grew steadily.The installation and debugging techniques made great strides in aspects of different conventional hydrogeneratorsets, reversible pumped-storage units and their rotor spiders, runners, bearings, penstocks as well as controlequipment, such as computerized governors, intelligent monitoring devices. Major technical innovations werebrought about in the electrical and mechanical installation. For an arduous task to construct hydropower projectsof over 50 GW confronts hydropower installation enterprises at the beginning of 21 st century, the installationtechnologies will certainly develop around the projects.
文摘In order to ensure the highest safety requirements, nuclear power plant structures (the containment structures, the fuel storages and transportation systems) should be assessed against all possible internal and external impact threats. The internal impact threats include kinetic missiles generated by the failure of high pressure vessels and pipes, the failure of high speed rotating machineries and accidental drops. The external impact threats may come from airborne missiles, aircraft impact, explosion blast and fragments. The impact effects of these threats on concrete and steel structures in a nuclear power plant are discussed. Methods and procedures for the impact assessment of nuclear power plants are introduced. Recent studies on penetration and perforation mechanics as well as progresses on dynamic properties of concrete-like materials are presented to increase the understanding of the impact effects on concrete containment structures.
文摘This paper investigates the performance of SAPFs （shunt active power filters） which are introduced in order to address the quality issues in electrified railway supply systems. These filters can be installed at either the S/S （substation） end or at the SP （sectioning post） of the railway feeding power system. In this investigation novel control algorithms, based on the synchronously rotating frame of reference, are proposed for the case when the SAPF is installed at the substation end and its performance is assessed. The effectiveness of the proposed control algorithms are illustrated via Matlab/SimPower computer simulations and validated via comparisons with other publications. This investigation demonstrated that when the SAPF is installed at the substation side, it can effectively compensate for the higher harmonic supply current. In addition, the reactive power demand is fully compensated for, leading to close to unity power factor. However, the voltage drop/sag at the locomotive power supply feed point is only partially compensated for.
文摘The thesis researches the safety infonnation and control system （SICS） design principle and introduces engineering application in CPR1000 nuclear power station in China. The SICS provides sufficient control and monitoring means to bring and maintain the plant in a safe state as a backup of main computerized control mean （MCM）, in any plant conditions that are probable during a planed or unplanned unavailability of the MCM. The successful engineering applications of SICS in different digital I＆C system platform are introduced in the paper. The thesis gives the research conclusion for new general SICS of digital I＆C system.
文摘AREVA operates a world-wide unique thermal hydraulic platform to ensure high safety standards in the nuclear industries. This platform is operated as an accredited test and inspection body according to ISO 17025 and 17020 to grant a high and independently confmned quality standard. The accreditation also ensures the independency of the organization and confidentiality to the individual stakeholders, for example research centers, utilities, components suppliers, engineering companies and vendors. Especially for nuclear power plants, it is very relevant to consider that reliability depends on the integrity of its components during its life time-from design through construction, operation and maintenance. For example, a typical NPP （nuclear power plant） has 1,000 to 2,000 large valves and 7,500 to 12,500 small valves, of which about 200 to 400 are designated Safety Class 1. The qualification of these Safety Class 1 components is relevant for reactor new builds but also for installed plants. This paper explains newly established qualification tasks, the corresponding testing infrastructure, and the state of the art of testing technology. By way of example, the paper describes the program and possible sequence of qualifying NPP safety-related components.
文摘Hydropower changes lives in Equatorial GuineaBefore the Djiploho Hydropower Station（DHS）was built,Djiploho was a secluded forest village in Equatorial Guinea.The change has shone a spotlight on the Wele River,now quite literally the center of power.Liu Bao,chief supervisor of the DHS project,
文摘The Fourth Nuclear Security Summit—to be held in Washington,D.C.from March31 to April 1—will be of particular importance with regards to the Democratic People’s Republic of Korea’s recent announcement that it will conduct a nuclear warhead explosion test and the fifth anniversary of the Fukushima nuclear power plant accident in March.President Xi Jinping will attend the summit and elaborate on the global nuclear security situation and China’s nuclear security concept.
