Abstract
The Concept of the SEAGUL system (Snow Enhancing Atomic-power Generation UtiLity) is proposed in this paper. Lowering the temperature of sea water used for cooling an atomic-power plant will increase the a efficiency of power generation and add several ten MW additional electric power to the output of a 1356 MW class plant. The system concept is to use a huge amount of seasonal storage snow for cooling water temperature control. In a case study for the Kashiwazaki-Kariwa Nuclear Power Generation Plant, it is estimated that cooling down the sea water from 29 C to 20 C using 80 kt of snow for 3 hours in a day would add 60 MWh of electric power per day. Annually, 3.4 Mt of stored snow will add 1800 MWh of electric power.
