Devices for cooling the control rods of nuclear reactors

Claim 1

IN A NUCLEAR REACTOR, A CORE, TUBULAR MEANS FORMING A PLURALITY OF CHANNELS EXTENNDING THROUGH SAID CORE AND EACH HAVING AN INLET END AND AN OUTLET END, MEANS FOR FEEDING A COOLANT FLUID UNDER PRESSURE AT THE INLET END OF EACH OF SAID CHANNELS, EACH OF SAID CHANNELS BEING OF INCREASING CROSS SECTION FROM SAID INLET END TOWARD THE OUTLET END THEREOF, A NEUTRON ABSORBING CONTROL ROD OF UNIFORM CROSS SECTION IN EACH OF SAID CHANNELS COAXIALLY DISPLACEABLE THEREIN, SAID ROD BEING SO DIMENSIONED THAT WHEN IT IS ENGAGED TO THE MINIMUM DEPTH IN THE RESPECTIVE CHANNEL, THE END OF SAID ROD NEAREST TO THE CHANNEL INLE END IS IN THE PORTION OF MINIMUM CROSS SECTION OF THE CHANNEL, WHEREAS WHEN SAID ROD IS ENGAGED TO THE MAXINUM DEPTH IN THE RESPECTIVE CHANNEL SO AS TO BE LOCATED IN SAID CORE, SAID ROD END NEAREST TO THE CHANNEL INLET AND IS IN THE PORTION OF MAXIMUM CROSS SECTION OF SAID CHANNEL AND MEANS FOR ADJUSTABLE POSITIONING EACH OF SAID CONTROL RODS IN ITS RESPECTIVE CHANNEL, WHEREBY THE COOLANT FLOW RATE ALONG EACH OF SAID RODS INCREASES THEN SAID ROD IS INTRODUCED MORE DEEPLY INTO SAID CORE.