Nuclear power provided about 70 percent of the electricity for the COP26 meeting in Glasgow on Tuesday, according to data from National Grid’s Carbon Intensity API.

Nuclear output from the Torness and Hunterston B power plants, supported by wind power, gave the southern Scotland region, which includes Glasgow, the lowest carbon electricity in the United Kingdom. Other parts of the country, which lack nuclear and renewable capacity, had to burn coal and gas to meet most of their electricity demand.

The United Kingdom has announced a shortlist of five sites as the potential future home of the U.K. Atomic Energy Authority’s (UKAEA) prototype fusion energy plant, the Spherical Tokamak for Energy Production (STEP). A final decision on the plant’s location is to be made by the U.K.’s secretary of state for business, energy and industrial strategy around the end of 2022.

Only a few of the more than 3,000 radioisotopes that scientists have synthesized in the laboratory are regularly used in diagnostic or therapeutic medicine. One significant barrier to the development of new medical radioisotopes is the difficulty of gaining access to radionuclides during the early stages of development and research. PRISMAP is a new medical radionuclide program designed to streamline that access for medical research in the European Union and the United Kingdom.

Inside a new steel-clad facility nicknamed “The Citadel,” First Light Fusion has installed a 22-meter two-stage gas gun—the third-largest such component in Europe.