Apparatus for controlling a nuclear reactor by absorbent gas and device for its application

Claim 1

APPARATUS FOR CONTROLLING THE ACTIVITY OF A NUCLEAR REACTOR BY REGULATING THE DEGREE OF PRESSURE OF AN ABSORBENT GASEOUS MIXTURE FILLING A LOOP DISPOSED IN THE CORE OF THE REACTOR, COMPRISING: A CLOSED CIRCULATION SYSTEM FILLED WITH SAID ABSORBENT GASEOUS MIXTURE UNDER PRESSURE; MEANS CONNECTED WITH SAID SYSTEM FOR SUPPLYING SAID GASEOUS MIXTURE TO SAID SYSTEM UNDER HIGH PRESSURE; CIRCULATING PUMP MEANS CONNECTED WITH SAID CIRCULATION SYSTEM FOR CIRCULATING SAID ABSORBENT GASEOUS MIXTURE THROUGH SAID SYSTEM; AT LEAST ONE PRESSURE REDUCING, MECHANICAL ELEMENT HAVING A HIGH PRESSURE INLET AND LOW PRESSURE OUTLET MEANS CONNECTED IN SAID CIRCULATION SYSTEM FOR REGULATING THE DEGREE OF PRESSURE OF SAID ABSORBENT GASEOUS MIXTURE IN SAID CIRCULATION SYSTEM DOWNSTREAM OF SAID ELEMENT; SAID HIGH PRESSURE INLET OF SAID PRESSURE REDUCING ELEMENT BEING IN DIRECT COMMUNICATION WITH SAID HIGH PRESSURE SUPPLY; SAID LOW PRESSURE OUTLET MEANS INCLUDING FIRST AND SECOND OUTLETS, SAID FIRST OUTLET BEING CONNECTED TO SAID CIRCULATION SYSTEM; A CLOSED CIRCULATION LOOP DISPOSED IN THE CORE OF SAID REACTOR; AND MEANS CONNECTING SAID CIRCULATION LOOP AND SAID SECOND OUTLET OF SAID PRESSURE REDUCING ELEMENT FOR FILING SAID CIRCULATION LOOP WITH SAID ABSORBENT GASEOUS MIXTURE AT A REGULATED PRESSURE.