Means for terminating nuclear reactions

Claim 1

IN A SYSTEM OF THE CLASS DESCRIBED: MEANS FOR SUSTAINING A NUCLEAR FISSON CHAIN REACTION COMPRISING NEUTRON MODERATOR, COOLANT CONDUITS EXTENDING THERETHROUGH, THERMAL NEUTRON FISSIONABLE MATERIAL IN DIRECT HEAT EXCHANGE RELATIONSHIP WITH SAID CONDUITS. AN INLET HEADER AND, AN OUTLET HEADER CONNECTED TO SOME OF SAID CONDUITS, COOLANT-RETURNING MEANS, HAVING AN UPSTREAM END CONNECTED TO THE OUTLET HEADER, AND A DOWNSTREAM END CONNECTED TO THE INLET HEADER WHEREBY CYCLIC FLOW OF COOLANT IS OBTAINED, A FIRST VALVED MEANS CONNECTING THE INLET ENDS OF THE BALANCE OF SAID CONDUITS TO THE DOWNSTREAM END OF SAID COOLANT-RETURNING MEANS, AND A SECOND VALVED MEANS CONNECTING THE OUTLETS ENDS OF SAID BALANCE OF SAID CONDUITS TO THE UPSTREAM END OF SAID COOLANT-RETURNING MEANS; AND MEANS FOR TERMONATING SAID REACTION COMPRISING A SOURCE OF A REACTION-TERMINATING FLUID, MEANS FOR CONNECTING SAID RESERVOIR TO THE SECOND VALVED MEANS, VOIR FOR SAID REACTION-TERMINATING FLUID, AND MEANS, A RESERCONNECTING SAID RESERVOIR TO THE SECOND VALVED MEANS, THE FIRST AND SECOND VALVED MEANS BEING ADAPTED TO STOP CYCLIC FLOW OF COOLANT THROUGH SAID BALANCE OF SAID COOLANT CONDUITS AND TO PROVIDE FOR FLOW OF THE FLUID FROM THE SOURCE THROUGH SAID BALANCE OF CONDUITS TO RESERVOIR WITHOUT INTRODUCING SAID FLUID INTO THE CYCLED COOLANT.