Modelling of steady state erosion of CFC actively water-cooled mock-up for the ITER divertor

作者：Ogorodnikova O V^*

来源：Journal of Nuclear Materials, 2008, 375(2): 252-258.

DOI：10.1016/j.jnucmat.2008.01.010

Calculations of the physical and chemical erosion of CFC (carbon fibre composite) monoblocks as outer vertical target of the ITER divertor during normal operation regimes have been done. Off-normal events and ELM's are not considered here. For a set of components under thermal and particles loads at glancing incident angle, variations in the material properties and/or assembly of defects could result in different erosion of actively-cooled components and, thus, in temperature instabilities. Operation regimes where the temperature instability takes place are investigated. It is shown that the temperature and erosion instabilities, probably, are not a critical point for the present design of ITER vertical target if a realistic variation of material properties is assumed, namely, the difference in the thermal conductivities of the neighbouring monoblocks is 20% and the maximum allowable size of a defect between CFC armour and cooling tube is +/-90 degrees in circumferential direction from the apex.

• 出版日期2008-4-15
• 单位中国地震局