An Assessment of the Diablo Canyon Nuclear Plant for Zero-Carbon Electricity, Desalination, and Hydrogen Production
Key study findings:
- Delaying the retirement of Diablo Canyon to 2035 would reduce California power sector carbon emissions by more than 10% from 2017 levels and reduce reliance on gas, save $2.6 Billion in power system costs, and bolster system reliability to mitigate brownouts; if operated to 2045 and beyond, Diablo Canyon could save up to $21 Billion in power system costs and spare 90,000 acres of land from use for energy production, while meeting coastal protection requirements.
- Using Diablo Canyon as a power source for desalination could substantially augment fresh water supplies to the state as a whole and to critically overdrafted basins regions such as the Central Valley, producing fresh water volumes equal to or substantially exceeding those of the proposed Delta Conveyance Project—but at significantly lower investment cost.
- A hydrogen plant connected to Diablo Canyon could produce clean hydrogen to meet growing demand for zero-carbon fuels, at a cost up to 50% less than hydrogen produced from solar and wind power, with a much smaller land footprint.
- Operating Diablo Canyon as a polygeneration facility—with coordinated and varying production of electricity, desalinated water, and clean hydrogen—could provide multiple services to California, including grid reliability as needed, and further increase the value of the Diablo Canyon electricity plant by nearly 50% (and more, if water prices were to substantially increase under conditions of worsening drought).