“Radioactive reactor fuel and graphite lay everywhere. Part of the roof had collapsed into Unit 4’s section of the turbine hall, setting turbine 7 on fire and breaking an oil pipe, which spread the fire still further and set the hall’s roof alight. Falling debris had broken the pressure valve on a feed pump, which was gushing out boiling, radioactive water.135 Men and women rushed past chunks of uranium fuel as they battled to contain the blaze, isolate electrical systems, and manually open oil-drain and cooling-water valves. Many of these brave souls later died, unaware they had been running among pieces of reactor fuel. For their part, Akimov and Toptunov stayed at the plant after the morning shift relieved them from duty at 6am, choosing to join the desperate effort to salvage the situation. The pair decided water flow to the reactor must be blocked by a closed valve somewhere, so they went together to the half-destroyed feedwater room, where they opened valves on the two feedwater lines. Next, they moved to another room, where they stood knee-deep in a highly radioactive mixture of fuel and water for hours, turning half-submerged valves by hand until the radiation drained their strength and they were evacuated to Pripyat’s hospital.136 Their noble efforts were in vain. The water lines had been destroyed along with the reactor - they were opening valves to nowhere - yet still the control room operators continued redirecting water towards the reactor even six hours after the explosion.”