Home / Standards / GB/T 40408-2021 GB/T 40408-2021 Active Nuclear grade isostatic graphite for high temperature gas-cooled reactor internals 高温气冷堆堆内构件用核级等静压石墨 Standard Type GBT ICS 29.050 CCS Q53 Status 现行 Issue Date 2021-08-20 Implementation 2022-03-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A