On April 22 the New Safe Confinement was transferred to trial operation mode. During the trial operation practically all NSC equipment and systems will be operated in the design mode within 72 hours. The goal of the trial operation is to make sure that all equipment and devices are operated in the design mode and perform their functions. In addition, such operation will allow checking the level of ChNPP's personnel qualification gained during the training.
The test subject during the trial operation is the conditional dismantling of SO unstable structures.
The first stage of the trial operation was devoted to the testing of the main cranes system (hereinafter: MCS): movement of carriages from bridge cranes to maintenance garages (northern and southern garages).
During the second testing day the MCS crane run-way beams were inspected and movement of two cranes (western and eastern) over the Shelter Object roof was tested. After that dismantling, lifting and movement to the temporary storage site of a metal truss, established during the Shelter Object stabilization measures, was simulated.