temperature gas-cooled reactor (HTGR) in China. After the commissioning phase, several
safety demonstration tests, focusing on simulating the anticipated transient without scram
(ATWS) scenarios, were successfully performed on this reactor. Among these tests, a
reactivity insertion ATWS test was conducted in November, 2003 by withdrawing a single
control rod with no activation of the reactor shutdown system. This test was carried out at …