Thanks for your reply Mike. We had a recent Black Out on the refinery and we cooled at the end with top wáter. It was the only alternative because the feed line was completely plugged.
The point we were discussing is to have an inmediat source of wáter, such as fire wáter, using the diesel oil driven pump.
I will check the presentation you mention, and I agree that using the cooling water pump discharge could be a good place.