[en] The author introduces the general situation of 72 hours continuous operation trial at rated power on Xi'an Pulsed Reactor (XAPR) steady-state core. The experimental results of environmental irradiation dose testing, measurement of equilibrium Xenon poison and Iodine pit reactivity depth while operating at rated full power are also given. The experimental results show that the main body and process systems of XAPR are working order, and that the synthetic performance has reach the design requirements, and that the fuel temperature has more safety margin