Reactor system and control valve

Claim 1

A NEUTRONIC POWER REACTOR SUSTEM HAVING A GAS CIRCULATION SYSTEM INCLUDING A PAIR OF CONCENTRICALLY ARRANGED DUCTS IN FLUID COMMUNICATIONWITH THE REACTOR VESSEL, SAID DUCTS INCLUDING A U-BEND DISPOSED EXTERNALLY OF THE REACTOR VESSEL, SAID REACTOR SYSTEM BEING IN COMBINATION WITH, A VALVE MEANS COMPRISING A STORAGE TANK DISPOSED BELOW THE U-BEND CONTAINING A METAL WHICH BECOMES LIQUID AT A RELATIVELY LOW, PREDETERMINED TEMPERATURE, A SOURCE OF PRESSURE GAS COMMUNIATING WITH AN UPPER PORTION OF SAID TANK, MEANS OPERABLE TO CONTROLLABLY VARY THE PRESSURE OF SAID GAS WITHIN SAID TANK, A PAIR OF CONCENTRIC FEED PIPES EXTENDING FROM A POSITION WITHIN THE LOWER PORTION OF SAID TANK TO SAID U-BEND IN THE CONCENTRIC DUCTS WITH THE INNER FEED PIPE IN FLUID COMMUNICATION WITH THE INNER ONE OF SAID CONCENTRIC DUCTS AND THE OUTER FEED PIPE IN FLUID COMMUNICATION WITHH THE OUTER ONE OF SAID CONCENTRIC DUCTS. MEANS FOR HEATING THE METAL IN SAID TANK TO MAINTAIN SAID METAL IN A LIQUID STATE, HEAT PRODUCING MEANS ASSOCIATED WITH SAID FEED PIPES AND SELECTIVELY OPERABLE TO