I have heard that the pressure was bled down, so it is or should be near atmospheric pressure. Obviously, the higher the pressure difference you pump against the more power the pump would need. This number relates to a 1 ATM pressure drop.

As an ultimate jury rig, you could use a fire truck to pump these flow rates, as long as the pressure drop was not too severe. You could also put pumps together in series.

Anyway, we need to wish those at the site the best of luck. Hopefully they also managed to get the fuel rods out of the pools and into somewhere else before these things went bonkers.

Nb41