MMMM a steaming hot mug of Plasma.

   He was intentionally ignorant of what the FOOF would do.  Blind to its ability, once the coolant had been stopped, to burn a hole though the earth and at the same time turn that very same earth into magma.  Hot molten goo that was so credibly reactive it would melt a hole in a metal pipeline and fill it with hot oozing ultra reactive plasma.  The exothermic magma would come in contact with water, and that would empower a secondary reaction, and burn through the pipe destroying a vast length of it.  All this was supposed to happen with out a surface disturbance, and hopefully the destruction of the mostly forgotten unused pipeline would be undiscovered, and in fact be a perfect trial run for the main event.