Nuclear boiler
AssigneeCommissariat a l'Energie Atomique
InventorsJean-Louis Andrieu, Yves Bonnet, Michel Viaud
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Abstract
In a pressurized-water reactor (PWR), the top flange of the pressure vessel is penetrated by nozzles connected to vertical primary heat-exchangers which are located outside the vessel and above the level of connection. The heat exchangers and the primary circulating pumps are so arranged as to leave a free and unobstructed area above the reactor closure head, thus facilitating refuelling operations as well as remedial work on both pumps and heat exchangers in the event of a fault condition.
Claims7
A nuclear boiler, comprising a vertical pressure vessel which is provided with a closed bottom and a closure head at the top, a reactor core in the vessel, a heat exchanger through which liquid can be circulated to cool said reactor core, a pump for circulating said liquid located external of the pressure vessel and below the closure head, a flange located on the outer surface of the pressure vessel and in the upper portion thereof above the reactor core for providing a junction and a supporting surface therein to which the heat exchanger is connected, a nozzle in the flange for proving access to the interior of the pressure vessel, the heat exchanger further being located entirely above said nozzle and the input thereto being located below the closure head, first liquid conducting means for connecting the outlet of the reactor core with the inlet of the heat exchanger through said nozzle, second liquid conducting means for connecting the outlet of the heat exchanger with the inlet of the pump, and third liquid conducting means for connecting the outlet of the pump with the inlet of the reactor core.
Dependencies are inferred from the claim text.