Improvements to the secondary heat transfer circuit to nuclear reactors cooled by liquid sodium

LOCATION IN A TANK PUMP FREE LEVEL IN SECONDARY HEAT TRANSPORT NUCLEAR REACTOR COOLED LIQUID METAL. EC SECONDARY HEAT TRANSPORT SYSTEM IN WHICH THE LIQUID METAL OCCUPIED LOWER THAN WHEN SECONDARY CIRCUIT IS COMPLETED THE LIQUID METAL AND A HIGHER LEVEL WHEN THE SECONDARY CIRCUIT IS EMPTY; WHEEL PUMP IS UP TO END ITS SHAFT INTERMEDIATE LEVEL BETWEEN A LOWER LEVEL AND A LEVEL HIGHER; DRIVING VACUUM PUMP DEBOUCHE BELOW LOWER; THE PUMP IS PROVIDED WITH PROTECTION MEANS WHEN THE LIQUID METAL HOLDS THE LOWER LEVEL TO PREVENT THE PASSAGE OF OVERCOMING THE GAS LIQUID METAL IN FORCEMAIN PUMP defusing RISK THEREOF WHEN STARTING OR VOLUNTARILY unexpectedly AT STOP. APPLICATION TO COMPLETION OF A NUCLEAR REACTOR FAST NEUTRON COOLED LIQUID METAL.