China has planned to develop independently the ITER TBM modules for testing during ITER operation period. Although different concepts for ITER TBMs have been proposed by other parties. However, the He-cooled solid bre...China has planned to develop independently the ITER TBM modules for testing during ITER operation period. Although different concepts for ITER TBMs have been proposed by other parties. However, the He-cooled solid breeder blanket （HCSB） with ferritic /martensitic steel （FMs） is still main stream for the fusion DEMO blanket design and has foundation of the world R＆D database. Therefore, a helium-cooled solid pebble bed concept has been adopted, as one of options, in Chinese TBM modules design. Under the cooperation of domestic institutes, the preliminary design and performances analysis as well as a draft design description document （DDD） based on the definition and the strategy of DEMO fusion reactor in China have been carried out recently.展开更多
In ITER test blanket module design, the elucidation of tritium recovery from solid tritium breeding material is one of critical issues and Li2TiO3 is a candidate of tritium breeding materials. In the present study, in...In ITER test blanket module design, the elucidation of tritium recovery from solid tritium breeding material is one of critical issues and Li2TiO3 is a candidate of tritium breeding materials. In the present study, in order to understand tritium behavior in solid breeding material Li2TiO3, the X-ray photoelectron spectroscopy （XPS） and thermal desorption spectroscopy （TDS） experiments are carried out to elucidate the trapping behavior using 3 keV D2^＋ implanted sample. The Ti-2p XPS spectrum shows that a shoulder appeared at the lower energy side as increasing ion fluence, and it was suggested that Ti^3＋ was formed by the reduction of Ti^4＋.展开更多
The China home team is developing an ITER TBM based on a helium-cooled solid breeder （HCSB） DEMO blanket concept . This blanket concept employs high-pressure helium （8 MPa） to cool down the blanket first wall （FW...The China home team is developing an ITER TBM based on a helium-cooled solid breeder （HCSB） DEMO blanket concept . This blanket concept employs high-pressure helium （8 MPa） to cool down the blanket first wall （FW） and side wall （SW） structures and the interior of the blanket module, including the beryllium multiplier pebble beds and the Li4SiO4 breeder pebble beds （enriched lithium-6 of 80%）. The tritium breeder is purged by forced flow low-pressure helium （0.1 MPa） provided by the tritium extraction system （TES）. Low activation ferritic/martensitic steel is selected as the structural material for the TBM.展开更多
In fusion breeders, the flux and energy spectra of neutrons undergo a great change throughout the first wall and blanket. Therefore, to get correct spatial and temporal distributions of radioactive nuclides, a calcula...In fusion breeders, the flux and energy spectra of neutrons undergo a great change throughout the first wall and blanket. Therefore, to get correct spatial and temporal distributions of radioactive nuclides, a calculation method practical for a fission breeder cannot be directly applied in a fusion breeder. As a result, a code FDKR, which is applicable to radioactivity calculations for fusion breeders, has been developed and its corresponding decay chain library has been produced. Radioactivity, afterheat, BHP and WDR calculations have been performed for the FDEB using the code FDKR, and results are given.展开更多
文摘China has planned to develop independently the ITER TBM modules for testing during ITER operation period. Although different concepts for ITER TBMs have been proposed by other parties. However, the He-cooled solid breeder blanket （HCSB） with ferritic /martensitic steel （FMs） is still main stream for the fusion DEMO blanket design and has foundation of the world R＆D database. Therefore, a helium-cooled solid pebble bed concept has been adopted, as one of options, in Chinese TBM modules design. Under the cooperation of domestic institutes, the preliminary design and performances analysis as well as a draft design description document （DDD） based on the definition and the strategy of DEMO fusion reactor in China have been carried out recently.
文摘In ITER test blanket module design, the elucidation of tritium recovery from solid tritium breeding material is one of critical issues and Li2TiO3 is a candidate of tritium breeding materials. In the present study, in order to understand tritium behavior in solid breeding material Li2TiO3, the X-ray photoelectron spectroscopy （XPS） and thermal desorption spectroscopy （TDS） experiments are carried out to elucidate the trapping behavior using 3 keV D2^＋ implanted sample. The Ti-2p XPS spectrum shows that a shoulder appeared at the lower energy side as increasing ion fluence, and it was suggested that Ti^3＋ was formed by the reduction of Ti^4＋.
文摘The China home team is developing an ITER TBM based on a helium-cooled solid breeder （HCSB） DEMO blanket concept . This blanket concept employs high-pressure helium （8 MPa） to cool down the blanket first wall （FW） and side wall （SW） structures and the interior of the blanket module, including the beryllium multiplier pebble beds and the Li4SiO4 breeder pebble beds （enriched lithium-6 of 80%）. The tritium breeder is purged by forced flow low-pressure helium （0.1 MPa） provided by the tritium extraction system （TES）. Low activation ferritic/martensitic steel is selected as the structural material for the TBM.
文摘In fusion breeders, the flux and energy spectra of neutrons undergo a great change throughout the first wall and blanket. Therefore, to get correct spatial and temporal distributions of radioactive nuclides, a calculation method practical for a fission breeder cannot be directly applied in a fusion breeder. As a result, a code FDKR, which is applicable to radioactivity calculations for fusion breeders, has been developed and its corresponding decay chain library has been produced. Radioactivity, afterheat, BHP and WDR calculations have been performed for the FDEB using the code FDKR, and results are given.
