ITER related research for 2007


As one of the two major supporting institutions in China to the ITER program, SWIP undertook several ITER agreement tasks. In cooperation with the ITER International Organization,        2007’s research activities were mainly focused on the first wall FW plate fabrication qualification, ITER TBM design, ITER gravitation support, neutron flux monitoring, and divertor magnetic probe. In addition, the conceptual design for the ceramic breeder DEMO power plant HCSB-DEMO has already been carried out.

In the CFS implemented tasks of FW plate fabrication qualification, several mock-ups have been fabricated and tested in 2007 according to the specification of the qualification mock-up. Samples were cut from the mock-ups, used for the measurement of the binding strength of Be/Cu/SS and the defects at the interfaces, the analysis of the interface microstructure and the high heat flux test HHFT properties. The evolution of the CuCrZr alloy properties during the fabrication thermal process was also studied. So far more than 200 MPa has been achieved for the RT shear strength of the Be/Cu joints, while the average strength was more than 150 MPa. The shear fracture always took place at the interface with a flat fracture surface. On the other hand, the ultimate tensile strength of the Cu/SS joints was always more than 220 MPa at RT. This fracture occurred in the Cu alloy, indicating the binding strength is more than the alloy. HHF tests of CN-G01 beryllium and ITER-FW modules made in China were performed in an electron beam facility JUDITH-1 FZJ, Germany by bilateral cooperation between SWIP and FZJ, the aim is to evaluate their heat load assistance capabilities and manufacture technologies and therefore modify their manufacture technologies.  

    The design of Chinese ITER TBM test blanket module is also in progressing. The revision of the HCSB-TBM has been carried out, 3 dimensional structure models have been designed. A new 3-D MCNP module and calculation of 26 HCSB TBM, which had been optimized, have been completed in 2007. Research and development of relevant technology for HCSB TBM, such as tritium exaction, high temperature helium test loop 500 , 10 MPa, structure CLF-1 and tritium breeder materials Li4SiO4 have been performed.

    Besides, structure analysis of the modified ITER gravitation support using finite element model FEM, including maximum static stress, bulking and fatigue calculation, has been carried out. A neutron generator for the calibration of the neutron flux monitoring was designed in detail.