Molten fuel nuclear reactor with neutron reflecting coolant

A molten fuel nuclear reactor comprising:

• a containment vessel and vessel head enclosing a volume;
• a reactor core configured to contain molten fuel salt enclosed within the volume, the reactor core having an upper region and a lower region;
• a neutron reflector within the volume, the neutron reflector configured to contain at least some neutron-reflecting liquid;
• a heat exchanger enclosed within the volume adjacent to a portion of the neutron reflector;
• a molten fuel salt flow path that passes through the reactor core and the heat exchanger wherein the heat exchanger is configured to transfer heat from molten fuel salt passing through the heat exchanger to a primary coolant and further configured to transfer heat from the adjacent neutron reflector to the primary coolant;
• and
• a neutron-reflecting liquid flow path, separate from the molten fuel salt flow path, that passes the at least some neutron-reflecting liquid in the neutron reflector through the portion of the neutron reflector.