Because your fuel is liquid, and it's combined with your coolant, you could actually just drain the core into what's called a sub-critical setting, basically a tank underneath the reactor that has some neutrons absorbers.
Combustibilul fiind lichid, combinat cu agentul de răcire miezul reactorului se scurge realmente, în ceea ce numim instalație subcritică, de fapt un rezervor sub reactor care conține niște absorbanți de neutroni.