NbTi Strands Verification for ITER PF CICC Process Qualification of CNDA

11th European Conference on Applied Superconductivity

Liu, F.^1 ; Liu, H.^1 ; Liu, S.^2 ; Liu, B.^1 ; Lei, L.^1 ; Wu, Y.^1

Institute of Plasma Physics, Chinese Academy of Sciences (ASIPP), Hefei, China^1

ITER China, Beijing

100038, China^2

关键词: Cable-in-conduit conductors;    Chinese Academy of Sciences;    International thermonuclear experimental reactor;    Poloidal field conductors;    Residual resistance;    Resistive transition;    Superconducting strands;    Verification tests;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/507/3/032029/pdf
DOI  :  10.1088/1742-6596/507/3/032029

来源: IOP

【 摘 要 】

China is in charge of most of Poloidal Field (PF) conductors production for the International Thermonuclear Experimental Reactor (ITER). The execution for PF conductors shall be in three main phases. According to ITER Procurement Arrangement (PA), the Domestic Agency (DA) shall be required to verify the room and low temperature acceptance tests carried out by the strand suppliers. As the reference laboratory of Chinese DA (CNDA), the superconducting strands test laboratory of Institute of Plasma Physics, Chinese Academy of Sciences (ASIPP) was undertaking the task of strands verification for ITER conductors. The verification test includes: diameter, Nickel plating thickness, copper-to-non-copper volume ratio, twist pitch direction and length, standard critical current (IC) and resistive transition index (n), residual resistance ration (RRR), and hysteresis loss. 48 NbTi strands with 7 billets were supplied for the PF Cable-In-Conduit Conductor (CICC) process qualification. In total, 54 samples were measured. The verification level for PF CICC process qualification was 100%. The test method, facility and results of each item are described in detail in this publication.