Room 114/4, the western main circulation pump engine room in Unit 2 at the Chernobyl Nuclear Power Plant. View is to the south, showing all four MCP motors and the overhead crane for servicing them. The reactor vault is to the left. On the floor to the left of the pumps are the throttle valve controls for the main circulation circuit attached to the discharge side of each pump. In normal operation, three of the four pumps would be running and one would be on standby.