High - pressure containment vessel, redundant
passive decay heat removal, and containment heat removal systems.
Water inventory in the reactor pool is large enough to remove
core decay heat from all the NuScale Power Modules for an unlimited period of time without adding water.
I haven't bought any of these, but I do have the Tartelette toasted, which to me seems like an
Urban Decay Heat lite, in a way!
Fuel units must be stored initially in pools at reactor sites for about five years, until
the decay heat drops enough to permit movement into dry cask containers.
But what you have to worry about is
the decay heat that's still in the core — that will last for many days.
«And to keep
that decay heat of the uranium from melting the core, you have to keep water on it.
As a result, if a Fukushima - type incident were to occur, and all power supply is lost, the reactor will automatically shutdown and removal of
the decay heat will occur safely.