In October 2020, the company was chosen by the United States Department of Energy as a recipient of a matching grant totaling between $400 million and $4 billion over the next 5 to 7 years for the cost of building a demonstration reactor of their "Natrium" design, which uses liquid sodium as a core coolant (this reduces the cost by having a non-pressurized primary loop). It then transfers that heat to molten salt which can be stored in tanks and used to generate steam for electricity production on demand, enabling the reactor to run continuously at constant power while allowing the electricity generation from the power station to be dispatchable