Home / Standards / NB/T 20177-2012 NB/T 20177-2012 Active 压水堆核电厂设备冷却水系统设计准则 Standard Type NB ICS N/A CCS N/A Status Active Issue Date 2012-10-19 Implementation 2013-03-01 Centralized Committee 国家能源局 Issuing Authority 国家能源局