Due to its unique properties, such as favorable neutronic characteristic, low melting point(～125 ?C) and highboiling point (> 1 600 ?C), good natural circulation and chemical inertness with water and air (unlike s...Due to its unique properties, such as favorable neutronic characteristic, low melting point(～125 ?C) and highboiling point (> 1 600 ?C), good natural circulation and chemical inertness with water and air (unlike sodium), etc,lead bismuth eutectic (LBE) has been considered as perspective coolant and spallation target for accelerator drivensystems (ADS)[1;2]. The spallation structural materials of ADS will be long-term irradiated with fast neutrons whilesimultaneous being contact with LBE coolant. In the past few decades, irradiation or LBE corrosion behaviors invarious of materials have been massively investigated for the purpose of developing ADS. However, there are onlya few experiment data on the combined effect of irradiation and LBE corrosion on structural materials due to lackof related experimental setups[3;4]. Such tests are not only essential for ensuring the safety and reliability of ADS,but also necessary for building a database for licensing any materials for use in LBE cooled nuclear systems.展开更多
Due to the excellent neutron physical properties and thermal safety performance,the lead-based fast reactor is adopted as subcritical reactor in the CiADS project.In order to overcome the technical difficulties in the...Due to the excellent neutron physical properties and thermal safety performance,the lead-based fast reactor is adopted as subcritical reactor in the CiADS project.In order to overcome the technical difficulties in the design and manufacture of the main equipments,test the operating characteristics of the main equipments,and study the thermal-hydraulic and safety characteristics of the reactor,the reactor group carried out the research and development of CiADS liquid lead-bismuth cooled fast reactor main equipment prototypes and LFR non-nuclear integrated verification device in 2022.展开更多
Nuclear energy is one of the most promising energy for the future.The disposal of high-level radioactive nuclear waste is a big problem.The nuclear waste problem has restricted the sustainable development of nuclear e...Nuclear energy is one of the most promising energy for the future.The disposal of high-level radioactive nuclear waste is a big problem.The nuclear waste problem has restricted the sustainable development of nuclear energy.Accelerator Driven Systems(ADS)was considered to have a very good potential for safely and efficiently burn MAs.LBE spallation target is one of the potential candidate of the ADS(Accelerator Driven Sub-critical System).The thermohydraulics character of LBE is much different from the traditional reactor coolant,such as water and gas.So we need to develop the LBE technology.展开更多
1.MCNPX target physics computation The purpose of physical check is mainly to check whether the parameters in the XADS reports[1]are reasonable,to give the results and analysis and get the energy distribution of the t...1.MCNPX target physics computation The purpose of physical check is mainly to check whether the parameters in the XADS reports[1]are reasonable,to give the results and analysis and get the energy distribution of the target window and target zone,so as to provide heat source for thermal engineering and structure.According to the reference,the proton beam energy is 600 MeV and the beam current is 6 mA.The footprint of the beam has a circular shape with the radius of 8 cm and the beam intensity following an elliptical radical distribution is given.The thickness of target window and beam tube is 3 mm,and the thickness of structural material is 5 mm,and the spherical radius of target window is 10 cm.Heavy metal material is LBE.All physical check calculations are accomplished by MCNPX2.7.0.The final physical results are showed in Table 1.展开更多
As one of the key equipment of the reactor,the performance of the LBE pump will directly affect the reactor safety.Recently,the LBE pump for the comprehensive test platform has been manufactured.In order to obtain the...As one of the key equipment of the reactor,the performance of the LBE pump will directly affect the reactor safety.Recently,the LBE pump for the comprehensive test platform has been manufactured.In order to obtain the performance data of this pump,calibrate the design value and calculation model,the performance experiment has been conducted under water before the test under LBE.展开更多
文摘Due to its unique properties, such as favorable neutronic characteristic, low melting point(～125 ?C) and highboiling point (> 1 600 ?C), good natural circulation and chemical inertness with water and air (unlike sodium), etc,lead bismuth eutectic (LBE) has been considered as perspective coolant and spallation target for accelerator drivensystems (ADS)[1;2]. The spallation structural materials of ADS will be long-term irradiated with fast neutrons whilesimultaneous being contact with LBE coolant. In the past few decades, irradiation or LBE corrosion behaviors invarious of materials have been massively investigated for the purpose of developing ADS. However, there are onlya few experiment data on the combined effect of irradiation and LBE corrosion on structural materials due to lackof related experimental setups[3;4]. Such tests are not only essential for ensuring the safety and reliability of ADS,but also necessary for building a database for licensing any materials for use in LBE cooled nuclear systems.
文摘Due to the excellent neutron physical properties and thermal safety performance,the lead-based fast reactor is adopted as subcritical reactor in the CiADS project.In order to overcome the technical difficulties in the design and manufacture of the main equipments,test the operating characteristics of the main equipments,and study the thermal-hydraulic and safety characteristics of the reactor,the reactor group carried out the research and development of CiADS liquid lead-bismuth cooled fast reactor main equipment prototypes and LFR non-nuclear integrated verification device in 2022.
文摘Nuclear energy is one of the most promising energy for the future.The disposal of high-level radioactive nuclear waste is a big problem.The nuclear waste problem has restricted the sustainable development of nuclear energy.Accelerator Driven Systems(ADS)was considered to have a very good potential for safely and efficiently burn MAs.LBE spallation target is one of the potential candidate of the ADS(Accelerator Driven Sub-critical System).The thermohydraulics character of LBE is much different from the traditional reactor coolant,such as water and gas.So we need to develop the LBE technology.
文摘1.MCNPX target physics computation The purpose of physical check is mainly to check whether the parameters in the XADS reports[1]are reasonable,to give the results and analysis and get the energy distribution of the target window and target zone,so as to provide heat source for thermal engineering and structure.According to the reference,the proton beam energy is 600 MeV and the beam current is 6 mA.The footprint of the beam has a circular shape with the radius of 8 cm and the beam intensity following an elliptical radical distribution is given.The thickness of target window and beam tube is 3 mm,and the thickness of structural material is 5 mm,and the spherical radius of target window is 10 cm.Heavy metal material is LBE.All physical check calculations are accomplished by MCNPX2.7.0.The final physical results are showed in Table 1.
文摘As one of the key equipment of the reactor,the performance of the LBE pump will directly affect the reactor safety.Recently,the LBE pump for the comprehensive test platform has been manufactured.In order to obtain the performance data of this pump,calibrate the design value and calculation model,the performance experiment has been conducted under water before the test under LBE.
