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United States Patent Application

View the Complete Application at the US Patent & Trademark Office
A cooling system for a reactor module includes a reactor pressure vessel that houses primary coolant and a steam generator that lowers a temperature of the reactor pressure vessel by transferring heat from the primary coolant to a secondary coolant that circulates through the steam generator. The steam generator releases at least a portion of the secondary coolant as steam. Additionally, the cooling system includes a containment vessel that at least partially surrounds the reactor vessel in a containment region. The containment region is dry during normal operation of the reactor module. A controller introduces a source of water into the containment region in response to a non-emergency shut down of the reactor module. The source of water is located external to the containment vessel, and the water is introduced into the containment region after the steam generator has initially lowered the temperature of the reactor pressure vessel in response to releasing the steam.
KELLER, Michael (Corvallis, OR), SNUGGERUD, Ross (Corvallis, OR), LISZKAI, Tamas (Corvallis, OR)
NuScale Power, LLC (Corvallis OR)
14/ 923,277
October 26, 2015
GOVERNMENT INTEREST [0001] This invention was made with Government support under Contract No. DE-NE0000633 awarded by the Department of Energy. The Government has certain rights in this invention.