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.
Fordi ens brændstof er flydende,  og det er kombineret med ens kølevæske, kunne man faktisk bare tømme kernen ned i det der hedder en sub-kritisk indstilling, dybest set en tank under reaktoren der har nogle neutronabsorbere.