Abstract:
SPRR-300 reached first criticality in 1979. The minimalist technical transformation of the reactor had only been done once around the year of 2002. The failure ratio of the reactor goes down year by year. Before 2002, 31 scrams occurred. The reactor resumed normal operation in 2003. In this year, there were 27 scrams. There were 14 scrams in 2004 and 2005. It is a must that the quality of the staff should be enhanced steadily to solve every accident correctly and resolutely.
There were 12 cases in 2003 that the power supplies for ionization chambers gave alarms of lower voltage because the voltage of local power grid was too low. Also in 2003, the second regulate rod system worked abnormal two times. Once in 2004 the drop-fuse of one transformer outside the reactor building struck arc. The reactor was forced to be shut down temporarily. Most of threats to the normal operation come from instability of power grids outside the reactor building. Through maintaining and repairing in accordance with certain cases apart from overhauling at regular intervals for the devices, all systems of the reactor are kept in good condition, which meets the demand to guarantee the safety of the reactor.