Cooling parts of a steam generator by feedwater

Claim 1

IN A STEAM GENERATING PLANT: A FEED PIPE, A VALVE IN SAID FEED PIPE FOR REGULATING THE FEEDWATER SUPPLY, A COOLING WATER PIPE, A COOLING DEVICE INTERPOSED IN SAID COOLING WATER PIPE FOR PASSING THE COOLING WATER AS A COOLANT, SAID COOLING WATER PIPE BEING CONNECTD TO SAID FEED PIPE UPSTREAM OF SAID VALVE FOR RECEIVING WATER FROM SAID FEED PIPE AND BEING CONNECTED TO SAID FEED PIPE DOWNSTREAM OF SAID VALVE FOR RETURNING WATER AFTER PASSAGE AS A COOLANT THROUGH SAID COOLING DEVICE TO SAID FEED PIPE, AND REGULATING MEANS CONNECTED TO SAID COOLING WATER PIPE FOR REGULATING THE FLOW OF COOLING WATER THERETHROUGH SAID REGULATING MEANS INCLUDING A FLOW RATE MEASURING DEVICE PLACED IN SAID COOLING WATER PIPE, A THROTTLING DEVICE INTERPOSED IN SAID COOLING WATER PIPE, AND A REGULATOR INCLUDING FLOW RATE SET POINT SETTING MEANS, SAID REGULATOR BEING OPERATIVELY CONNECTED TO SAID FLOW RATE MEASURING DEVICE AND TO SAID THROTTLING DEVICE FOR ACTUATING THE LATTER IN RESPONSE TO THE DIFFERENCE BETWEEN THE COOLING WATER FLOW RATE MEASURED BY THE FORMER AND THE FLOW RATE SET BY SAID SET POINT SETTING MEANS.