The SMR-300 is walk-away safe because the nuclear plant can keep all its nuclear fuel safe, cool and undamaged within the reactor, spent fuel pool and integrated HI-STORM UMAX (Holtec International Storage Module Underground MAXimum Capacity) underground spent fuel storage canisters, for an unlimited time in the case of any unforeseen catastrophic event. The plant operators are not required to take action to ensure cooling occurs. Under extreme environmental events, like the one that occurred at Fukushima, SMR-300 behaves like a simple, large, passively cooled heat exchanger relying on the same safety principles that Holtec International’s spent fuel storage technology employs at over 100 operating nuclear power plants around the world today.
