Sodium deuterium reactor

Claim 1

IN A SODIUM, DEUTERIUM OXIDE REACTOR CONSISTING OF A REACTOR ROOM, A SEALED CALANDRIA SPACED WITHIN SAID REACTOR ROOM CONTAINING SAID DEUTERIUM OXIDE, AN UPPER HEADER ROOM DISPOSED ABOVE SAID REACTOR ROOM, A LOWER HEADER ROOM DISPOSED BELOW SAID REACTOR ROOM, A LEAKAGE SEPARATION AND THERMAL BARRIER SYSTEM FOR SEPARATING SAID SODIUM AND DEUTERIUM OXIDE, COMPRISING: A PLURALITTY OF THIN METAL WALLED FUEL COOLANT TUBES EXTENDING INTO AN THROUGH SAID CALANDRIA PASSING THROUGH SAID UPPER HEADER ROOM TO AND TERMINATING WITHIN SAID LOWER HEADEE ROOM FOR CONVEYING SAID SODIUM IN A MOLTEN CONDITION, MEANS SUSPENDING SAID FUEL-COOLANT TUBES FROM THE TOPS THEREOF TO PERMIT THEIR DOWNWARD THERMAL EXPANSION, FISSIONABLE FUEL ELEMENTS MOUNTED WITHIN AND SUPPORTED BY SAID COOLANT TUBES IN THE PORTION THEREOF ENCLOSED BY SAID CALANDRIA, A BARRIER TUBE FOR EACH SAID FUEL-COOLANT TUBE SURROUNDING SAND SPACED THEREFORM EXTENDING FROM WITHIN SAID UPPER HEADER ROOM TO WITHIN SAID LOWER HEADER ROOM, MEANS FOR SEALING THE ENDS OF EACH SAID BARRIER TUBE TO THE BOTTOM AND TOP WALLS OF SAID UPPER AND LOWER HEADER ROOMS, RESPECTIVELY, THEREBY FORMING AN ANNULAR PASSING WAY BETWEEN EACH SAID FUEL COOLANT AND BARRIER TUBE INTERCONNCTING BOTH SAID HEADER ROOMS, AND A CALANDRIA TUBE SURROUNDING AND SPACED FROM EACH SAID BARRIER TUBE EXTENDING THROUGH SAID CALANDRIA AND SEALED AT THE ENDS THEREOF TO THE WALLS OF SAID CALANDRIA FORMING AN ANNULAR SPACE OPEN TO SAID REACTOR ROOM AND RESILIENTLY SUPPORTED AT THE TOPS THEREOF TO PERMIT THEIR THERMAL EXPANSION UPWARDLY, SAD ANNULAR PASSAGEWAY AND SAID ANNULAR SPACE FORMING SEPARATE BARRIERS TO PREVENT CONTACT OF LEAKING SODIUM WITH LEAKING DEUTERIUM OXIDE AND REDUCE THE TRANSFER OF HEAT FROM THE MOLTEN SODIUM TO THE DEUTERIUM OXIDE.