研究性重水反应堆于1983年4月改为UO_2堆芯。UO_2堆芯的工程启动实验只进行了与堆芯变更有关的项目,主要是:1.工艺管流通试验;2.主回路特性试验;3.提升功率及高功率连续考验。一、工艺管流通试验反应堆主回路入堆重水除大部分进入工艺管外,还有一部分重水从工艺管与内壳底部插座之间的缝隙中漏出。漏流率η按设计要求约为6%。随着反应堆运行以及装卸料次数 The research heavy water reactor was changed to a UO 2 core in April 1983. UO_2 core engineering start-up experiments only carried out with the core changes related to the project, mainly: 1. Process tube flow test; 2. Main loop characteristics test; 3. To enhance the power and high power continuous test. First, the process pipe flow test Reactor main circuit into the reactor except for most of the heavy water into the process tube, there are some heavy water from the process tube and the bottom of the inner shell leakage gap between the socket. The leakage rate η according to the design requirements of about 6%. With the reactor running and loading and unloading times