RADIATION PROTECTION ›› 2019, Vol. 39 ›› Issue (6): 510-516.

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Effect of loads on wear performance of graphite pebbles used in HTR-PM high temperature gas cooled reactor

DENG Shaogang, GUO Lixiao, LIANG Yu, ZHANG Yuhang, LIANG Dong, WANG Yongxian   

  1. China Institute for Radiation Protection, Taiyuan 030006
  • Received:2018-06-12 Online:2019-11-20 Published:2020-05-15

Abstract: Wear performance of graphite pebbles used in the HTR-PM high temperature gas cooled reactor at different loads in helium were investigated with a friction and wear tester. Surface and appearance of graphite pebbles were analyzed using a optical microscope. Particle size and pattern of graphite dust were studied using a scanning electron microscope and laser particle analyzer. Results show that in helium atmosphere, the friction coefficient decreases as the load increases. The graphite dust is mainly flaky or flocculent, and has strong adhesiveness. Particle size of the graphite dust increases as the load increases. At different loads, the wear rate of graphite pebbles decreases continuously and eventually goes to a steady value.

Key words: HTR-PM, load, graphite pebble, wear performance

CLC Number: 

  • TL342